10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2014

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                      to                     

Commission File Number 0-25756

IBERIABANK Corporation

(Exact name of Registrant as specified in its charter)

Louisiana	72-1280718
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification Number)
200 West Congress Street, Lafayette, Louisiana	70501
(Address of principal executive office)	(Zip Code)

Registrant’s telephone number, including area code: (337) 521-4003

Securities registered pursuant to Section 12(g) of the Act: Not Applicable

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Name of Exchange on which registered
Common Stock (par value $1.00 per share)	The NASDAQ Stock Market, LLC

Indicate by check mark if the Registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Exchange Act of 1934.    Yes  x    No  ¨

Indicate by check mark if the Registrant is not required to file reports pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934.    Yes  ¨    No  x

Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  ¨

Indicate by check mark whether the Registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the Registrant was required to submit and post such files).    Yes  x    No  ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of Registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.  ¨

Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company (as defined in Securities Exchange Act Rule 12b-2).

Large Accelerated Filer  x Accelerated Filer  ¨ Non-accelerated Filer  ¨ Smaller Reporting Company  ¨

Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the Act)    Yes  ¨    No  x

As of June 30, 2014, the last business day of the Registrant’s most recently completed second fiscal quarter, the aggregate market value of the voting shares of common stock held by non-affiliates of the Registrant was approximately $2.2 billion. This figure is based on the closing sale price of $69.19 per share of the Registrant’s common stock on June 30, 2014. For purposes of this calculation, the term “affiliate” refers to all executive officers and directors of the Registrant and all shareholders beneficially owning more than 10% of the Registrant’s common stock.

Number of shares of common stock outstanding as of February 20, 2015: 33,560,780

DOCUMENTS INCORPORATED BY REFERENCE

(1) Portions of the Annual Report to Shareholders for the fiscal year ended December 31, 2014 are incorporated into Part II, Items 5 through 9B of this Form 10-K; (2) portions of the definitive proxy statement for the 2014 Annual Meeting of Shareholders to be filed within 120 days of Registrant’s fiscal year end (the “Proxy Statement”) are incorporated into Part III, Items 10 through 14 of this Form 10-K.

IBERIABANK CORPORATION AND SUBSIDIARIES

TABLE OF CONTENTS

	PART I
Item 1.	Business	1
Item 1A.	Risk Factors	17
Item 1B.	Unresolved Staff Comments	35
Item 2.	Properties	35
Item 3.	Legal Proceedings	35
Item 4.	Mine Safety Disclosures	35
	PART II
Item 5.	Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	37
Item 6.	Selected Financial Data	38
Item 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	38
Item 7A.	Quantitative and Qualitative Disclosures about Market Risk	38
Item 8.	Financial Statements and Supplementary Data	38
Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	39
Item 9A.	Controls and Procedures	39
Item 9B.	Other Information	40
	PART III
Item 10.	Directors, Executive Officers and Corporate Governance	41
Item 11.	Executive Compensation	41
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	41
Item 13.	Certain Relationships and Related Transactions, and Director Independence	41
Item 14.	Principal Accounting Fees and Services	41
	PART IV
Item 15.	Exhibits and Financial Statement Schedules	42
SIGNATURES		47

PART I.

Item 1. Business.

Unless we indicate otherwise, the words “we”, “our”, “us”, “IBKC”, and “Company” refer to IBERIABANK Corporation and its wholly owned subsidiaries.

General

IBERIABANK Corporation, a Louisiana corporation, is a financial holding company with 294 combined locations, including 202 bank branch offices and three loan production offices in Louisiana, Arkansas, Florida, Alabama, Tennessee, and Texas, 23 title insurance offices in Arkansas and Louisiana, and mortgage representatives in 57 locations in 10 states. The Company also has eight wealth management locations in five states and one IBERIA Capital Partners, LLC office in Louisiana. As of December 31, 2014, we had consolidated assets of $15.8 billion, total deposits of $12.5 billion and shareholders’ equity of $1.9 billion.

Our principal executive office is located at 200 West Congress Street, Lafayette, Louisiana, and our telephone number at that office is (337) 521-4003. Our website is located at www.iberiabank.com.

We are the holding company for IBERIABANK, a Louisiana banking corporation headquartered in Lafayette, Louisiana; Lenders Title Company, an Arkansas-chartered title insurance and closing services agency headquartered in Little Rock, Arkansas (“Lenders Title”); IBERIA Capital Partners, LLC, a corporate finance services firm (“ICP”); IB Aircraft Holdings LLC, a holding company for our fractional investment in an aircraft, 1887 Leasing, LLC, a holding company for our investment in a separate aircraft, IBERIA Asset Management, Inc. (“IAM”), which provides wealth management and trust services to high net worth individuals, pension funds, corporations and trusts; and IBERIA CDE L.L.C. (“CDE”), which invests in purchased tax credits.

IBERIABANK offers commercial and retail banking products and services to customers throughout locations in six states. IBERIABANK provides these products and services in Louisiana, Alabama, Florida, Arkansas, Tennessee, and Texas. These products and services include a broad array of commercial, consumer, mortgage, and private banking products and services, cash management, deposit and annuity products and investment brokerage services. Certain of our non-bank subsidiaries engage in financial services-related activities, including brokerage services, sales of variable annuities, life, health, dental and accident insurance products, and wealth management services. Lenders Title offers a full line of title insurance and closing services throughout Arkansas and Louisiana. ICP provides equity research, institutional sales and trading, and corporate finance services. IB Aircraft Holdings, LLC owns a fractional share of an aircraft used by management of the Company and its subsidiaries, and 1887 Leasing, LLC, owns a separate aircraft. IAM provides wealth management and trust services for commercial and private banking clients. CDE is engaged in the purchase of tax credits.

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Subsidiaries

IBERIABANK has six active, wholly-owned non-bank subsidiaries. Information related to the non-bank subsidiaries as of December 31, 2014 is presented in the following table (dollars in millions):

Company	Description	Total Assets		Iberiabank’s Equity Investment
Iberia Financial Services, LLC	Manages the brokerage services offered by IBERIABANK	$	10	$	8
IB SPE Management Inc.	Operates then sells certain foreclosed assets acquired in recent Florida and Alabama acquisitions		37		37
Acadiana Holdings, LLC	Owns and operates a commercial office building that also serves as IBERIABANK’s headquarters		11		10
Iberiabank Mortgage Company	Offers one-to-four family residential mortgage loans		194		72
Iberia Investment Fund I, LLC	Investment fund held for the purpose of funding new market tax credits		133		59
Iberia Investment Fund II, LLC	Investment fund held for the purpose of funding new market tax credits		8		2

Lenders Title provides a full line of title insurance and loan closing services for both residential and commercial customers in locations throughout Arkansas. Lenders Title has three wholly-owned subsidiaries, Asset Exchange, Inc., United Title of Louisiana, Inc. (“United Title”), and American Abstract and Title Company, Inc. (“AAT”). Asset Exchange, Inc. provides qualified intermediary services to facilitate Internal Revenue Code Section 1031 tax deferred exchanges. At December 31, 2014, Lenders Title’s equity investment in Asset Exchange, Inc. was $0.3 million, and Asset Exchange, Inc. had total assets of $0.3 million. United Title and AAT provide a full line of title insurance and loan closing services for both residential and commercial customers in locations throughout Louisiana and Arkansas. At December 31, 2014, Lenders Title’s equity investment in United Title was $8 million, and United Title had total assets of $10 million. Lenders Title’s equity investment in AAT was $5 million and AAT had total assets of $5 million.

ICP, IB Aircraft Holdings, LLC, 1887 Leasing, LLC, IAM, and CDE had total assets of $15 million, $0.2 million, $11 million, $0.7 million, and less than $0.1 million, respectively, at December 31, 2014.

Competition

We face strong competition in attracting deposits, originating loans, and providing title services. Our most direct competition for deposits has historically come from other commercial banks, savings institutions and credit unions located in our market areas, including many large financial institutions that have greater financial and marketing resources available to them. In addition, during times of high interest rates, we have faced significant competition for investors’ funds from short-term money market securities, mutual funds and other corporate and government securities. Our ability to attract and retain customer deposits depends on our ability to generally provide a rate of return, liquidity and risk comparable to that offered by competing investment opportunities.

We experience strong competition for loan originations principally from other commercial banks, savings institutions and mortgage banking companies. We compete for loans principally through the interest rates and loan fees we charge, the efficiency and quality of services we provide borrowers and the convenient locations of our branch office network.

Employees

We had 2,683 full-time employees and 142 part-time employees as of December 31, 2014. None of these employees is represented by a collective bargaining agreement. We believe we enjoy an excellent relationship with our personnel.

Business Combinations

We continually evaluate business combination opportunities and sometimes conduct due diligence activities in connection with them. As a result, business combination discussions and, in some cases, negotiations take place, and transactions involving cash, debt or equity securities can be expected. Any future business combinations or series of business combinations that we might undertake may be material in terms of assets acquired or liabilities assumed.

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Available Information

Our filings with the Securities and Exchange Commission (“SEC”), including annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and all amendments thereto, are available on our website as soon as reasonably practicable after the reports are filed with or furnished to the SEC. Copies can be obtained free of charge in the “Investor Relations” section of our website at www.iberiabank.com. Our SEC filings are also available through the SEC’s website at www.sec.gov. Copies of these filings are also available by writing the Company at the following address:

IBERIABANK Corporation

P.O. Box 52747

Lafayette, Louisiana 70505-2747

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Supervision and Regulation

The banking industry is extensively regulated under both federal and applicable state laws. The following discussion is a summary of certain statutes and regulations applicable to bank and financial holding companies and their subsidiaries and provides specific information relevant to us. Regulation of financial institutions is intended primarily for the protection of depositors, deposit insurance funds and the banking system, and generally is not intended for the protection of shareholders. Proposals are frequently introduced to change federal and state laws and regulations applicable to us. The likelihood and timing of any such changes and the impact such changes might have on us are impossible to determine with any certainty. References to applicable statutes and regulations are brief summaries, do not purport to be complete, and are qualified in their entirety by reference to such statutes and regulations.

General

We are a bank holding company and have elected to be a financial holding company with the Board of Governors of the Federal Reserve System (the “FRB”). We are subject to examination and supervision by the FRB pursuant to the Bank Holding Company Act of 1956, as amended (the “BHCA”), and are required to file reports and other information regarding our business operations and the business operations of our subsidiaries with the FRB.

Generally, the BHCA provides for “umbrella” regulation of financial holding companies by the FRB and functional regulation of holding company subsidiaries by applicable regulatory agencies. The BHCA, however, requires the FRB to examine any subsidiary of a bank holding company, other than a depository institution, engaged in activities permissible for a depository institution. The FRB is also granted the authority, in certain circumstances, to require reports of, and to examine and adopt rules applicable to any holding company subsidiary.

In general, the BHCA and the FRB’s regulations limit the nonbanking activities permissible for bank holding companies to those activities that the FRB has determined to be so closely related to banking or managing or controlling banks to be a proper incident thereto. A bank holding company that elects to be treated as a financial holding company, however, may engage in, and acquire companies engaged in, activities that are considered “financial in nature,” as defined by the Gramm-Leach-Bliley Act and FRB regulations. These activities include, among other things, securities underwriting, dealing and market-making, sponsoring mutual funds and investment companies, insurance underwriting and agency activities, and merchant banking. See “— Financial Holding Company Status” below.

Because we are a public company, we are also subject to regulation by the Securities and Exchange Commission (the “SEC”). The SEC has established three categories of registrants for the purpose of filing periodic and annual reports. Under these regulations, we are considered to be a “large accelerated filer” and, as such, must comply with SEC large accelerated reporting requirements.

As a Louisiana-chartered commercial bank and a member of the Federal Reserve System, IBERIABANK is subject to regulation, supervision and examination by the Office of Financial Institutions of the State of Louisiana (the “OFI”), IBERIABANK’s chartering authority, and the FRB, IBERIABANK’s primary federal regulator. IBERIABANK is also subject to regulation, supervision and examination by the Federal Deposit Insurance Corporation (the “FDIC”). The FDIC insures the deposits of IBERIABANK to the maximum extent permitted by law.

State and federal laws govern the activities in which IBERIABANK may engage, the investments it may make and the aggregate amount of loans that may be granted to one borrower. Various consumer and compliance laws and regulations also affect IBERIABANK’s operations.

The banking industry is affected by the monetary and fiscal policies of the FRB. An important function of the FRB is to regulate the national supply of bank credit to moderate recessions and to curb inflation. Among the instruments of monetary policy used by the FRB to implement its objectives are: open-market operations in U.S. government securities, changes in the discount rate and the federal funds rate (which is the rate banks charge each other for overnight borrowings) and changes in reserve requirements on bank deposits.

In addition to federal and state banking laws and regulations, we and certain of our subsidiaries and affiliates, including those that engage in securities brokerage and insurance activities, are subject to other federal and state laws and regulations, and supervision and examination by other state and federal regulatory agencies, including the Financial Industry Regulatory Authority (“FINRA”), the U.S. Department of Housing and Urban Development (“HUD”), the SEC and various state insurance and securities regulators.

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The Dodd-Frank Act

The Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Dodd-Frank Act”), enacted in 2010, significantly restructured financial regulation in the United States, including through the creation of a new resolution authority, mandating higher capital and liquidity requirements, requiring banks to pay increased fees to regulatory agencies, and through numerous other provisions intended to strengthen the financial services sector.

The implications of the Dodd-Frank Act for the Company’s businesses will depend to a large extent on the manner in which rules adopted pursuant to the Dodd-Frank Act are implemented by the primary U.S. financial regulatory agencies as well as potential changes in market practices and structures in response to the requirements of the Dodd-Frank Act and financial reforms in other jurisdictions.

The Dodd-Frank Act established the Consumer Financial Protection Bureau, or CFPB, which has extensive regulatory and enforcement powers over consumer financial products and services, and the Financial Stability Oversight Council, which has oversight authority for monitoring and regulating systemic risk. In addition, the Dodd-Frank Act altered the authority and duties of the federal banking and securities regulatory agencies, implemented certain corporate governance requirements for all public companies including financial institutions with regard to executive compensation, proxy access by shareholders, and certain whistleblower provisions, and restricted certain proprietary trading and hedge fund and private equity activities of banks and their affiliates. The Dodd-Frank Act also required the issuance of numerous implementing regulations, many of which have not yet been issued.

In January 2013, the CFPB issued final regulations governing mainly consumer mortgage lending. One rule imposes additional requirements on lenders, including rules designed to require lenders to ensure borrowers’ ability to repay their mortgage. The CFPB also finalized a rule on escrow accounts for higher priced mortgage loans and a rule expanding the scope of the high-cost mortgage provision in the Truth in Lending Act. The CFPB also issued final rules implementing provisions of the Dodd-Frank Act that relate to mortgage servicing, which took effect. In addition, the CFPB issued a final appraisal rule under the Equal Credit Opportunity Act and federal agencies issued an interagency rule on appraisals for higher-priced mortgage loans. In November 2013, the CFPB issued a final rule on integrated mortgage disclosures under the Truth in Lending Act and the Real Estate Settlement Procedures Act, compliance with which is required by August 1, 2015. We have evaluated the impact of these mortgage disclosure rules and have determined that significant resources will be required to implement these changes.

In 2013, the CFPB provided guidance on fair lending practices to indirect automobile lenders with recommendations to ensure compliance with fair lending laws.

Recently, banking regulatory agencies have increasingly used a general consumer protection statute to address unethical or otherwise bad business practices that may not necessarily fall directly under the purview of a specific banking or consumer finance law. Prior to the Dodd-Frank Act, there was little formal guidance to provide insight to the parameters for compliance with the “unfair or deceptive acts or practices” (“UDAP”) law. However, the UDAP provisions have been expanded under the Dodd-Frank Act to apply to “unfair, deceptive or abusive acts or practices”, which has been delegated to the CFPB for supervision.

New laws or regulations or changes to existing laws and regulations (including changes in interpretation or enforcement) could materially adversely affect our financial condition or results of operations. Many aspects of the Dodd-Frank Act are subject to further rulemaking and will take effect over several years. The overall financial impact on us and our subsidiaries or the financial services industry generally cannot be anticipated at this time.

The Volcker Rule. On December 10, 2013, the FRB and other federal agencies issued final rules to implement the so-called “Volcker Rule” contained in the Dodd-Frank Act, generally to become effective on July 21, 2015. The Volcker Rule prohibits an insured depository institution and its affiliates (referred to as “banking entities”) from: (i) engaging in “proprietary trading” and (ii) investing in or sponsoring certain types of funds (“covered funds”) subject to certain limited exceptions. These prohibitions impact the ability of U.S. banking entities to provide investment management products and services that are competitive with nonbanking firms generally and with non-U.S. banking organizations in overseas markets. The rule also effectively prohibits short-term trading strategies by any U.S. banking entity if those strategies involve instruments other than those specifically permitted for trading. The level of required compliance activity depends on the size of the banking entity and the extent of its trading, and generally applies only to banking entities with $50 billion or more in total consolidated assets, or those with $50 billion or more in worldwide trading assets and liabilities.

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The final Volcker Rule regulations do provide certain exemptions allowing banking entities to continue underwriting, market-making and hedging activities and trading certain government obligations, as well as various exemptions and exclusions from the definition of “covered funds.”

On January 14, 2014, the five federal agencies approved an interim final rule to permit banking entities to retain interests in certain collateralized debt obligations backed primarily by trust preferred securities from the investment prohibitions of the Volcker Rule. Under the interim final rule, the agencies permit the retention of an interest in or sponsorship of covered funds by banking entities if certain qualifications are met. In addition, the agencies released a non-exclusive list of issuers that meet the requirements of the interim final rule. At December 31, 2014, we did not hold any collateralized debt obligations backed by trust preferred securities for investment purposes.

The Durbin Amendment. The “Durbin Amendment” provisions of the Dodd-Frank Act require the FRB to establish a cap on the rate merchants pay banks for electronic clearing of debit transactions (i.e. the interchange rate). The FRB issued a final rule for establishing standards, including a cap, for debit card interchange fees and prohibiting network exclusivity arrangements and routing restrictions. The final rule established standards for assessing whether debit card interchange fees received by debit card issuers were reasonable and proportional to the costs incurred by issuers for electronic debit transactions. Under the final rule, the maximum permissible interchange fee that an issuer may receive for an electronic debit transaction is the sum of 21 cents per transaction, a 1 cent fraud prevention adjustment, and 5 basis points multiplied by the value of the transaction. As a result of implementing this lower debit card interchange fee structure, our electronic banking income was negatively impacted.

On July 31, 2013, the U.S. District Court for the District of Columbia issued an order granting summary judgment to the plaintiffs in a case challenging certain provisions of the FRB’s final rule under the Durbin Amendment. The Court ruling vacated the provisions of the FRB’s final rule relating to standards for debit card interchange fees and the provision dealing with network non-exclusivity. The Court vacated the rule, but stayed its ruling to provide the FRB an opportunity to replace the invalidated portions. The FRB appealed this decision, and on March 21, 2014, the D.C. Circuit Court of Appeals reversed the District Court’s grant of summary judgment and remanded the case for further proceedings in accordance with its opinion. The merchants filed a petition for writ of certiorari to the U.S. Supreme Court. On January 20, 2015, the U.S. Supreme Court declined to hear an appeal of the Circuit Court reversal, thereby largely upholding the rule.

Holding Company Structure

We have one Louisiana-chartered commercial bank subsidiary, one title insurance company subsidiary, one subsidiary to provide equity research, institutional sales and trading, and corporate financial services, one subsidiary to provide wealth management and trust services, and multiple subsidiaries to operate corporate assets, including our fractional ownership of an aircraft and our investment in purchased tax credits, as well as numerous other non-bank subsidiaries of these first tier subsidiaries. Exhibit 21 of this Report on Form 10-K lists all of our current subsidiaries.

IBERIABANK is subject to affiliate transaction restrictions under federal laws, which limit the transfer of funds by a subsidiary bank or its subsidiaries to its parent corporation or any non-bank subsidiary of its parent corporation, whether in the form of loans, extensions of credit, investments, or asset purchases. Furthermore, such loans and extensions of credit must be secured within specified amounts. In addition, all affiliate transactions must be conducted on terms and under circumstances that are substantially the same as such transactions with unaffiliated entities. Such extensions of credit must be made on substantially the same terms, including interest rates and collateral, as those prevailing at the time for comparable transactions with third parties and must not involve more than the normal risk of repayment or present other unfavorable features. See “Affiliate Transactions” below.

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As a matter of policy, which has been codified by the Dodd-Frank Act, the FRB expects a bank holding company to act as a source of financial and managerial strength to each of its subsidiary banks and to commit resources to support each such subsidiary bank. Under this source of strength doctrine, the FRB may require a bank holding company to make capital injections into a troubled subsidiary bank. The FRB may charge the bank holding company with engaging in unsafe and unsound practices if it fails to commit resources to such a subsidiary bank or if it undertakes actions that the FRB believes might jeopardize its ability to commit resources to such subsidiary bank. A capital injection may be required at times when the holding company does not have the resources to provide it.

In addition, any loans by a holding company to a subsidiary bank are subordinate in right of payment to deposits and to certain other indebtedness of such subsidiary bank. In the event of a bank holding company’s bankruptcy, the bankruptcy trustee will assume any commitment by the holding company to a federal bank regulatory agency to maintain the capital of a subsidiary bank. Moreover, the bankruptcy law provides that claims based on any such commitment will be entitled to a priority of payment over the claims of the institution’s general unsecured creditors, including the holders of its note obligations.

Louisiana law permits the Commissioner of the OFI to require a special assessment of shareholders of a Louisiana-chartered bank whose capital has become impaired to remedy an impairment in such bank’s capital stock. This statute also provides that the Commissioner may suspend a bank’s certificate of authority until the capital is restored. As the sole shareholder of IBERIABANK, we are subject to such statute.

Moreover, the claims of a receiver of an insured depository institution for administrative expenses and the claims of holders of deposit liabilities of such an institution are accorded priority over the claims of general unsecured creditors of such an institution, including the holders of the institution’s note obligations, in the event of liquidation or other resolution of our institution. Claims of a receiver for administrative expenses and claims of holders of deposit liabilities of IBERIABANK, including the FDIC as the insurer of such holders, would receive priority over the holders of notes and other senior debt of IBERIABANK in the event of liquidation or other resolution and over our interests as sole shareholder of IBERIABANK.

Acquisitions. We comply with numerous laws relating to our acquisition activity. Under the BHCA, a bank holding company may not directly or indirectly acquire ownership or control of more than 5% of the voting shares or substantially all of the assets of any bank holding company or bank or merge or consolidate with another bank holding company without the prior approval of the FRB. Current Federal law authorizes interstate acquisitions of banks and bank holding companies without geographic limitation. Furthermore, a bank headquartered in one state is authorized to merge with a bank headquartered in another state, as long as neither of the states have opted out of such interstate merger authority prior to such date, and subject to any state requirement that the target bank shall have been in existence and operating for a minimum period of time, not to exceed five years; and subject to certain deposit market-share limitations. After a bank has established branches in a state through an interstate merger transaction, the bank may establish and acquire additional branches at any location in the state where a bank headquartered in that state could have established or acquired branches under applicable federal or state law.

On October 3, 2014, we entered into an agreement with Florida Bank Group, Inc., a Tampa, Florida-based banking holding company with $524 million in assets, pursuant to which we will acquire Florida Bank Group, Inc., and its commercial bank subsidiary, Florida Bank Group Bank. On October 27, 2014, we entered into an agreement and plan of merger with Old Florida Bancshares, Inc., a bank holding company located in Orlando, Florida with $1.4 billion in assets, pursuant to which we will acquire Old Florida Bancshares, Inc. and its commercial bank subsidiaries, Old Florida Bank and New Traditions Bank. On December 8, 2014, we announced the signing of a definitive agreement with Georgia Commerce Bancshares, Inc., an Atlanta, Georgia-based bank holding company with $1.0 billion in assets, pursuant to which we will acquire Georgia Commerce Bancshares, Inc., and its commercial bank subsidiary, Georgia Commerce Bank.

Safety and Soundness Regulations. The FRB has enforcement powers over bank holding companies and their non-banking subsidiaries. The FRB has authority to prohibit activities that represent unsafe or unsound practices or constitute violations of law, rule, regulation, administrative order or written agreement with a federal regulator. These powers may be exercised through the issuance of cease and desist orders, civil money penalties or other formal or informal actions.

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There also are a number of obligations and restrictions imposed on bank holding companies and their depository institution subsidiaries by federal law and regulatory policy that are designed to reduce potential loss exposure to the depositors of such depository institutions and to the FDIC insurance fund in the event the depository institution is insolvent or is in danger of becoming insolvent. For example, under requirements of the FRB with respect to bank holding company operations, a bank holding company is required to serve as a source of financial strength to its subsidiary depository institutions and to commit financial resources to support such institutions in circumstances where it might not do so otherwise. In addition, the “cross-guarantee” provisions of federal law require insured depository institutions under common control to reimburse the FDIC for any loss suffered or reasonably anticipated by the Deposit Insurance Fund (“DIF”) as a result of the insolvency of commonly controlled insured depository institutions or for any assistance provided by the FDIC to commonly controlled insured depository institutions in danger of failure. The FDIC may decline to enforce the cross-guarantee provision if it determines that a waiver is in the best interests of the DIF. The FDIC’s claim for reimbursement under the cross guarantee provisions is superior to claims of shareholders of the insured depository institution or its holding company, but is subordinate to claims of depositors, secured creditors and nonaffiliated holders of subordinated debt of the commonly controlled insured depository institution.

Banking regulators also have broad enforcement powers over IBERIABANK, including the power to impose fines and other civil and criminal penalties, and to appoint a conservator in order to conserve the assets of any such institution for the benefit of depositors and other creditors.

Dividends. We are a legal entity separate and distinct from our subsidiaries. The majority of our revenue is from dividends paid to us by IBERIABANK. IBERIABANK is subject to federal and state laws and regulations that limit the amount of dividends it can pay. In addition, we and IBERIABANK are subject to various regulatory restrictions relating to the payment of dividends, including requirements to maintain capital at or above regulatory minimums, and to remain “well-capitalized” under the prompt corrective action rules. The FRB has indicated generally that it may be an unsafe or unsound practice for a bank holding company to pay dividends unless the bank holding company’s net income over the preceding year is sufficient to fund the dividends and the expected rate of earnings retention is consistent with the organization’s capital needs, asset quality and overall financial condition.

In addition to the limitations placed on the payment of dividends at the holding company level, there are various legal and regulatory limits on the extent to which IBERIABANK may pay dividends or otherwise supply funds to us. IBERIABANK is subject to laws and regulations of Louisiana, which place certain restrictions on the payment of dividends. Additionally, as a member of the Federal Reserve System, IBERIABANK is subject to regulations of the FRB.

We do not expect that these laws, regulations or policies will materially affect the ability of IBERIABANK to pay dividends. Additional information is provided in Note 25 to the Consolidated Financial Statements incorporated herein by reference.

FDIC Insurance. IBERIABANK pays deposit insurance premiums to the FDIC based on assessment rates established by the FDIC. These rates generally depend upon a combination of regulatory ratings and financial ratios. Regulatory ratings reflect the applicable bank regulatory agency’s evaluation of the financial institution’s capital, asset quality, management, earnings, liquidity and sensitivity to risk, or “CAMELS”. Assessment rates for institutions that are in the lowest risk category currently vary from seven to twenty-four basis points per $100 of insured deposits, and may be increased or decreased by the FDIC on a semi-annual basis. Such base assessment rates are subject to adjustments based upon the institution’s ratio of (i) long-term unsecured debt to its domestic deposits, (ii) secured liabilities to domestic deposits and (iii) brokered deposits to domestic deposits (if greater than 10%). Insurance of deposits may be terminated by the FDIC upon a finding that the institution has engaged in unsafe and unsound practices, is in an unsafe or unsound condition to continue operations, or has violated any applicable law, regulation, rule, order or condition imposed by the FDIC.

In 2011, the FDIC adopted a final rule to revise the deposit insurance assessment system for large institutions: one for most large institutions that have more than $10 billion in assets, and another for “highly complex” institutions that have over $50 billion in assets and are fully owned by a parent with over $500 billion in assets. Each scorecard has a performance score and a loss-severity score that is combined to produce a total score, which is translated into an initial assessment rate. In calculating these scores, the FDIC will continue to utilize the bank’s supervisory CAMELS ratings and will introduce certain new forward-looking financial measures to assess an institution’s ability to withstand asset-related stress and funding-related stress. The rule also eliminates the use of risk categories and long-term debt issuer ratings for calculating risk-based assessments for institutions having more

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than $10 billion in assets. The FDIC is authorized to make discretionary adjustments to the total score based upon significant risk factors that are not adequately captured in the scorecard. The total score will then translate to an initial base assessment rate.

Also in 2011, the deposit insurance assessment base changed from total domestic deposits to the average consolidated total assets of the depository institution minus its average tangible equity, pursuant to a rule issued by the FDIC as required by the Dodd-Frank Act.

Under the Federal Deposit Insurance Act, as amended by the Dodd-Frank Act, a minimum ratio of the DIF’s deposit insurance reserves to estimated insured deposits, or designated reserve ratio (the “DRR”), of 1.15% is applicable prior to September 2020, and 1.35% thereafter. In late 2010, the FDIC issued a final rule setting the DRR at 2%. Because the DRR fell below 1.15% in 2008, and was expected to remain below 1.15%, the FDIC was required to establish and implement a Restoration Plan that would restore the reserve ratio to at least 1.15% within five years. In 2008, the FDIC adopted such a restoration plan (the “Restoration Plan”). In 2009, in light of the extraordinary challenges facing the banking industry, the FDIC amended the Restoration Plan to allow seven years for the reserve ratio to return to 1.15%. In 2009, the FDIC adopted a final rule that imposed a five basis point special assessment on each institution’s assets minus Tier 1 capital (as of June 30, 2009). Such special assessment was collected in 2009. In 2009, the FDIC also passed a final rule extending the term of the Restoration Plan to eight years. Such final rule also included a provision that implements a uniform three basis point increase in assessment rates, effective January 1, 2011, to help ensure that the reserve ratio returns to at least 1.15% within the eight year period called for by the Restoration Plan. In 2010, the FDIC adopted a new restoration plan to ensure the DRR reaches 1.35% by September 2020. The FDIC will, at least semi-annually, update its income and loss projections for the DIF and, if necessary, propose rules to further increase assessment rates. In addition, the FDIC announced in 2010 that it would seek public comment on whether banks with compensation plans that encourage risky behavior should be charged higher deposit assessment rates than such banks would otherwise be charged.

Insurance of deposits may be terminated by the FDIC upon a finding that the institution has engaged in unsafe and unsound practices, is in an unsafe or unsound condition to continue operations, or has violated any applicable law, regulation, rule, order or condition imposed by the FDIC.

In addition, the Deposit Insurance Funds Act of 1996 authorized the Financing Corporation (“FICO”) to impose assessments on applicable deposits in order to service the interest on FICO’s bond obligations from deposit insurance fund assessments. The amount assessed on individual institutions by FICO is in addition to the amount, if any, paid for deposit insurance according to the FDIC’s risk-related assessment rate schedules. The bonds issued by FICO are due to mature in 2017 through 2019. IBERIABANK recognized $1 million of expense related to its FICO assessments in 2014.

We cannot predict whether the FDIC will in the future further increase deposit insurance assessment levels.

Capital Requirements. The FRB has issued risk-based capital ratio and leverage ratio guidelines for bank holding companies and state member banks. The risk-based capital ratio guidelines establish a systematic analytical framework that:

• makes regulatory capital requirements sensitive to differences in risk profiles among banking organizations,

• takes off-balance sheet exposures into explicit account in assessing capital adequacy, and

• minimizes disincentives to holding liquid, low-risk assets.

Under the guidelines and related policies, bank holding companies and state member banks must maintain capital sufficient to meet both a risk-based asset ratio test and a leverage ratio test on a consolidated basis. The risk-based ratio is determined by allocating assets and specified off-balance sheet commitments into four weighted categories, with higher weighting assigned to categories perceived as representing greater risk. The risk-based ratio represents capital divided by total risk weighted assets. The leverage ratio is core capital divided by total assets adjusted as specified in the guidelines.

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Generally, under the applicable guidelines, a financial organization’s capital is divided into two tiers. Organizations that must incorporate market risk exposure into their risk-based capital requirements may also have a third tier of capital in the form of restricted short-term subordinated debt. These tiers are:

• “Tier 1”, or core capital, includes total equity plus qualifying capital securities and minority interests, excluding unrealized gains and losses accumulated in other comprehensive income, and non-qualifying intangible and servicing assets.

• “Tier 2”, or supplementary capital, includes, among other things, cumulative and limited-life preferred stock, mandatory convertible securities, qualifying subordinated debt, and the allowance for credit losses, up to 1.25% of risk-weighted assets.

• “Total capital” is Tier 1 plus Tier 2 capital.

The capital guidelines require that all intangible assets (net of deferred tax), except originated or purchased mortgage-servicing rights, non-mortgage servicing assets, and purchased credit card relationships, be deducted from Tier 1 capital. However, the total amount of these items included in capital cannot exceed 100% of its Tier 1 capital.

Under the risk-based guidelines effective through December 31, 2014, bank holding companies and financial institutions were required to maintain a risk-based ratio of 8%, with 4% being Tier 1 capital.

Under the leverage capital guidelines effective through December 31, 2014, bank holding companies and financial institutions were required to maintain a leverage ratio of at least 3%. The minimum ratio was applicable only to holding companies and financial institutions that meet certain specified criteria, including excellent asset quality, high liquidity, low interest rate risk exposure, and the highest regulatory rating. Bank holding companies and financial institutions not meeting these criteria were required to maintain a minimum Tier 1 leverage ratio of 4%.

The FRB’s capital guidelines also provide that bank holding companies experiencing internal growth or making acquisitions will be expected to maintain strong capital positions substantially above the minimum supervisory levels without significant reliance on intangible assets.

Special minimum capital requirements apply to a bank holding company’s equity investments in non-financial companies. The requirements consist of a series of deductions from Tier 1 capital that increase within a range from 8% to 25% of the adjusted carrying value of the investment.

Failure to meet applicable capital guidelines could subject the bank holding company or financial institution to a variety of enforcement remedies available to the federal regulatory authorities. These include limitations on the ability to pay dividends, the issuance by the regulatory authority of a capital directive to increase capital, and the termination of deposit insurance by the FDIC. In addition, the financial institution could be subject to the measures described below under “Prompt Corrective Action” as applicable to “under-capitalized” institutions.

The FRB’s risk-based capital standards specify that evaluations by the FRB of a bank’s capital adequacy will include an assessment of the exposure to declines in the economic value of the bank’s capital due to changes in interest rates. These federal banking agencies have issued a joint policy statement on interest rate risk describing prudent methods for monitoring such risk that rely principally on internal measures of exposure and active oversight of risk management activities by senior management.

Additional information, including our and IBERIABANK’s compliance with applicable capital adequacy standards at December 31, 2014, is provided in Note 19 to the Consolidated Financial Statements and in “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Capital Resources” in Exhibit 13 to this Form 10-K incorporated herein by reference.

Guidelines Effective January 1, 2015. In July 2013, the FRB and the other federal banking agencies issued final rules which implement in the United States the Basel III regulatory capital reforms from the Basel Committee on Banking Supervision and certain changes required by the Dodd-Frank Act. The Company and IBERIABANK became subject to the new rules on January 1, 2015. Under the final rules, minimum requirements have been increased for both the quality and quantity of capital held by banking organizations. In this respect, the final rules implement strict eligibility criteria for regulatory capital instruments and improve the methodology for calculating risk-weighted assets to enhance risk sensitivity. Among other things, the final rules include a new

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minimum ratio of Common Equity Tier 1 Capital to Risk-Weighted Assets of 4.5%, raise the minimum ratio of Tier 1 Capital to Risk-Weighted Assets from 4% to 6%, and include a minimum leverage ratio of 4% for all banking organizations. Common Equity Tier 1 Capital (CET1) is defined as the sum of common stock and related surplus net of treasury stock, retained earnings, AOCI and qualifying minority interest, less applicable regulatory adjustments and deductions that include AOCI. The final rule also limits a banking organization’s dividends, stock repurchases and other capital distributions, and certain discretionary bonus payments to executive officers, if the bank organization does not hold a “capital conservation buffer” consisting of 2.5% of common equity Tier 1 capital to risk-weighted assets above regulatory minimum risk-based requirements. Among other material changes to the previously effective capital guidelines, the final rules: assign a higher risk weight (150%) to exposures that are more than 90 days past due or are on nonaccrual status and to certain commercial real estate facilities that finance the acquisition, development or construction of real property; require unrealized gains and losses on certain “available-for-sale” securities holdings to be included for purposes of calculating regulatory capital requirements unless a one-time opt out is exercised; establish new limitations on the inclusion in regulatory capital of deferred tax assets and mortgage servicing rights; and expand the recognition of collateral and guarantors in determining risk-weighted assets. See Item 1A. “Risk Factors.”

Liquidity Requirements. Historically, regulation and monitoring of bank and bank holding company liquidity has been addressed as a supervisory matter without required formulaic measures. The Basel III framework requires banks and bank holding companies to measure their liquidity against specific liquidity tests that, although similar in some respects to liquidity measures historically applied by banks and regulators for management and supervisory purposes, going forward such measures will be required by regulation. One test, the liquidity coverage ratio, is designed to ensure that the banking entity maintains an adequate level of unencumbered high-quality liquid assets equal to the entity’s expected net cash outflow for a 30-day time horizon. The other test, the net stable funding ratio, is designed to promote more medium- and long-term funding of the assets and activities of banking entities over a one-year time horizon. These requirements are intended to incent banking entities to increase their holdings of U.S. Treasury securities and other sovereign debt as a component of assets and increase the use of long-term debt as a funding source.

Joint Supervisory Guidance on Stress Testing. In May 2012, the federal banking agencies issued joint supervisory guidance on stress testing. The guidance addresses stress testing in connection with overall risk management, including capital and liquidity planning. The guidance outlines general principles for stress testing, applicable to all FRB-supervised banking organizations with more than $10 billion in total consolidated assets. The guidance highlights the importance of stress testing as an ongoing risk management practice that supports a banking organization’s forward-looking assessment of its risks. It outlines broad principles for a satisfactory stress testing framework and describes the manner in which stress testing should be employed as an integral component of risk management.

As a bank holding company with total consolidated assets in excess of $10 billion, the Dodd-Frank Act requires us to submit a stress test to the FRB that projects our performance in various economic scenarios provided by the FRB. The Dodd-Frank Act stress tests are forward-looking exercises conducted by the FRB and financial companies regulated by the FRB to help ensure institutions have sufficient capital to absorb losses and support operations during adverse economic conditions. We are required to make certain assumptions in modeling future performance and must support these assumptions through statistical analysis and observed market behavior where applicable. The outcome of the FRB’s analysis of our projected performance (to include capital, earnings, and balance sheet changes) will be used in supervision of us and will assist the FRB in assessing our risk profile and capital adequacy. The results of our stress test could hinder our ability to pay quarterly cash dividends to shareholders as has been our practice, and could also impact the FRB’s decisions regarding future acquisitions by us.

Prompt Corrective Action. The Federal Deposit Insurance Corporation Improvement Act of 1991, known as FDICIA, requires federal banking regulatory authorities to take “prompt corrective action” with respect to depository institutions that do not meet minimum capital requirements. For these purposes, FDICIA establishes five capital tiers: “well-capitalized,” “adequately-capitalized,” “under-capitalized,” “significantly under-capitalized,” and “critically under-capitalized.”

Under regulations effective through December 31, 2014, an institution is deemed to be:

• “well-capitalized” if it has a total risk-based capital ratio of 10% or greater, a Tier 1 risk-based capital ratio of 6% or greater, and a Tier 1 leverage ratio of 5% or greater and is not subject to a regulatory order, agreement, or directive to meet and maintain a specific capital level for any capital measure;

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• “adequately-capitalized” if it has a total risk-based capital ratio of 8% or greater, a Tier 1 risk-based capital ratio of 4% or greater, and, generally, a Tier 1 leverage ratio of 4% or greater and the institution does not meet the definition of a “well-capitalized” institution;

• “under-capitalized” if it does not meet one or more of the “adequately-capitalized” tests;

• “significantly under-capitalized” if it has a total risk-based capital ratio that is less than 6%, a Tier 1 risk-based capital ratio that is less than 3%, or a Tier 1 leverage ratio that is less than 3%; and

• “critically under-capitalized” if it has a ratio of tangible equity, as defined in the regulations, to total assets that is equal to or less than 2%.

Throughout 2014, our regulatory capital ratios were in excess of the levels established for “well-capitalized” institutions.

The prompt corrective action rules were amended effective January 1, 2015 to incorporate a Common Equity Tier 1 Capital requirement and to increase the requirements for certain capital categories. In order to be adequately capitalized for purposes of the prompt corrective action rules, a banking organization is now required to have at least an 8% Total Risk-Based Capital Ratio, a 6% Tier 1 Risk-Based Capital Ratio, a 4.5% Common Equity Tier 1 Risk Based Capital Ratio and a 4% Tier 1 Leverage Ratio. To be well-capitalized, a banking organization is required to have at least a 10% Total Risk-Based Capital Ratio, an 8% Tier 1 Risk-Based Capital Ratio, a 6.5% Common Equity Tier 1 Risk Based Capital Ratio and a 5% Tier 1 Leverage Ratio.

FDICIA generally prohibits a depository institution from making any capital distribution, including payment of a cash dividend or paying any management fee to its holding company, if the depository institution would be “under-capitalized” after such payment. “Under-capitalized” institutions are subject to growth limitations and are required by the appropriate federal banking agency to submit a capital restoration plan. If any depository institution subsidiary of a holding company is required to submit a capital restoration plan, the holding company would be required to provide a limited guarantee regarding compliance with the plan as a condition of approval of such plan.

If an “under-capitalized” institution fails to submit an acceptable plan, it is treated as if it is “significantly under-capitalized.” “Significantly under-capitalized” institutions may be subject to a number of requirements and restrictions, including orders to sell sufficient voting stock to become “adequately-capitalized,” requirements to reduce total assets, and cessation of receipt of deposits from correspondent banks.

“Critically under-capitalized” institutions may not, beginning 60 days after becoming “critically under-capitalized,” make any payment of principal or interest on their subordinated debt. In addition, “critically under-capitalized” institutions are subject to appointment of a receiver or conservator within 90 days of becoming so classified.

Under FDICIA, a depository institution that is not “well-capitalized” is generally prohibited from accepting brokered deposits and offering interest rates on deposits higher than the prevailing rate in its market. As previously stated, IBERIABANK is “well-capitalized” and the FDICIA brokered deposit rule did not adversely affect their ability to accept brokered deposits. IBERIABANK had $619 million of such brokered deposits at December 31, 2014.

Financial Holding Company Status. A bank holding company meeting certain requirements may qualify and elect to become a financial holding company, permitting the bank holding company to engage in additional activities that are financial in nature or incidental or complementary to financial activity. Financial holding companies are authorized by the BHCA to engage in a number of financial activities previously impermissible for bank holding companies, including equity securities underwriting, dealing and market making; sponsoring mutual funds and investment companies; insurance underwriting and agency; and merchant banking activities through securities or insurance affiliates; and insurance company portfolio investments. The Act also permits the FRB to authorize additional activities for financial holding companies if they are “financial in nature” or “incidental” to financial activities.

For a bank holding company to be eligible to elect financial holding company status, the holding company must be both “well-capitalized” and “well-managed” under applicable regulatory standards, and all of its subsidiary

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banks also must be “well-capitalized” and “well-managed” and must have received at least a satisfactory rating on such institution’s most recent examination under the Community Reinvestment Act of 1977 (the “CRA”). A financial holding company that continues to meet all of such requirements may engage directly or indirectly in activities considered financial in nature (discussed above), either de novo or by acquisition, as long as it gives the FRB after-the-fact notice of the new activities. If a financial holding company fails to continue to meet any of the prerequisites for financial holding company status after engaging in activities not permissible for bank holding companies that have not elected to be treated as financial holding companies, the company must enter into an agreement with the FRB that it will comply with all applicable capital and management requirements. If the financial holding company does not return to compliance within 180 days, or such longer period as agreed to by the FRB, the FRB may order the company to discontinue existing activities that are not generally permissible for bank holding companies or divest investments in companies engaged in such activities. In addition, if any banking subsidiary of a financial holding company receives a CRA rating of less than satisfactory, the holding company would be prohibited from engaging in any additional activities other than those permissible for bank holding companies that are not financial holding companies.

Affiliate Transactions. IBERIABANK is subject to Regulation W, which comprehensively implements statutory restrictions on transactions between a bank and its affiliates. Regulation W combines the FRB’s interpretations and exemptions relating to Sections 23A and 23B of the Federal Reserve Act. Regulation W and Section 23A place limits on the amount of a bank’s loans or extensions of credit to, investments in, or certain other transactions with affiliates, and on the amount of advances to third parties collateralized by the securities or obligations of affiliates. In general, IBERIABANK’s “affiliates” are IBERIABANK Corporation and our non-bank subsidiaries.

Regulation W and Section 23B prohibit, among other things, a bank from engaging in certain transactions with affiliates unless the transactions are on terms substantially the same, or at least as favorable to the bank, as those prevailing at the time for comparable transactions with non-affiliated companies.

IBERIABANK is also subject to certain restrictions on extensions of credit to executive officers, directors, certain principal shareholders and their related interests. Such extensions of credit must be made on substantially the same terms, including interest rates and collateral, as those prevailing at the time for comparable transactions with third parties and must not involve more than the normal risk of repayment or present other unfavorable features.

Bank Secrecy Act. The Bank Secrecy Act, as amended by the USA Patriot Act of 2001 and its related regulations, requires insured depository institutions, broker-dealers, and certain other financial institutions to have policies, procedures, and controls to detect, prevent, and report money laundering and terrorist financing. The statute and its regulations also provide for information sharing, subject to conditions, between federal law enforcement agencies and financial institutions, as well as among financial institutions, for counter-terrorism purposes. Federal banking regulators are required, when reviewing bank holding company acquisition and bank merger applications, to take into account the effectiveness of the anti-money laundering activities of the applicants.

Consumer Privacy and Other Consumer Protection Laws. We, like all other financial institutions, are required to maintain the privacy of our customers’ non-public, personal information. Such privacy requirements, as established by the Gramm-Leach-Bliley Act of 1999, direct financial institutions to:

• provide notice to our customers regarding privacy policies and practices,

• inform our customers regarding the conditions under which their non-public personal information may be disclosed to non-affiliated third parties, and

• give our customers an option to prevent disclosure of such information to non-affiliated third parties.

Under the Fair and Accurate Credit Transactions Act of 2003, our customers may also opt out of information sharing between and among us and our affiliates. We are also subject, in connection with our lending and leasing activities, to numerous federal and state laws aimed at protecting consumers, including the Home Mortgage Disclosure Act, the Real Estate Settlement Procedures Act, the Equal Credit Opportunity Act, the Truth in Lending Act, and the Fair Credit Reporting Act.

Incentive Compensation. Guidelines adopted by the federal banking agencies prohibit excessive compensation as an unsafe and unsound practice and describe compensation as excessive when the amounts paid are unreasonable or disproportionate to the services performed by an executive officer, employee, director or principal stockholder.

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In 2010, the federal bank regulatory agencies issued guidance on incentive compensation policies (the “Incentive Compensation Guidance”) intended to ensure that the incentive compensation policies of banking organizations do not undermine the safety and soundness of such organizations by encouraging excessive risk-taking. The Incentive Compensation Guidance, which covers all employees that have the ability to materially affect the risk profile of an organization, either individually or as part of a group, is based upon the key principles that a banking organization’s incentive compensation arrangements should (i) provide incentives that do not encourage risk-taking beyond the organization’s ability to effectively identify and manage risks, (ii) be compatible with effective internal controls and risk management, and (iii) be supported by strong corporate governance, including active and effective oversight by the organization’s board of directors. Any deficiencies in compensation practices that are identified may be incorporated into the organization’s supervisory ratings, which can affect its ability to make acquisitions or perform other actions. The Incentive Compensation Guidance provides that enforcement actions may be taken against a banking organization if its incentive compensation arrangements or related risk-management control or governance processes pose a risk to the organization’s safety and soundness and the organization is not taking prompt and effective measures to correct the deficiencies.

The Dodd-Frank Act requires the federal bank regulatory agencies and the SEC to establish joint regulations or guidelines prohibiting incentive-based payment arrangements at specified regulated entities having at least $1 billion in total assets that encourage inappropriate risks by providing an executive officer, employee, director or principal shareholder with excessive compensation, fees, or benefits or that could lead to material financial loss to the entity. In February 2011, the federal banking agencies and the SEC issued for comment a proposed interagency rule that would require the reporting of incentive-based compensation arrangements by a covered financial institution, as well as prohibiting incentive-based compensation arrangements at a covered financial institution when such compensation is excessive, could expose the institution to inappropriate risks, or potentially lead to material financial loss.

The final interagency rules on incentive compensation required under the Dodd-Frank Act have not been finalized. It cannot be determined at this time whether compliance with the requirements of such future rules will adversely affect our and our subsidiaries’ ability to hire, retain and motivate their key employees.

Sarbanes-Oxley Act of 2002. The Sarbanes-Oxley Act of 2002, or the SOX Act, implements a broad range of corporate governance, accounting and disclosure requirements for public companies, and also for their directors and officers. SEC rules adopted to implement the SOX Act requirements require our chief executive and chief financial officer to certify certain financial and other information included in our quarterly and annual reports. The rules also require these officers to certify that they are responsible for establishing, maintaining and regularly evaluating the effectiveness of our financial reporting and disclosure controls and procedures; that they have made certain disclosures to the auditors and to the Audit Committee of the board of directors about our controls and procedures; and that they have included information in their quarterly and annual filings about their evaluation and whether there have been significant changes to the controls and procedures or other factors which would significantly impact these controls subsequent to their evaluation. Section 404 of the SOX Act requires management to undertake an assessment of the adequacy and effectiveness of our internal controls over financial reporting and requires our auditors to attest to and report on the effectiveness of these controls. See Item 9A. – “Controls and Procedures” hereof for our evaluation of disclosure controls and procedures. The certifications required by Sections 302 and 906 of the SOX Act also accompany this Report on Form 10-K.

Other Regulatory Matters. We and our subsidiaries and affiliates are subject to numerous examinations by federal and state banking regulators, as well as the SEC, FINRA, NASDAQ Stock Market, and various state insurance and securities regulators.

Corporate Governance. Information with respect to our corporate governance is available on our web site, www.iberiabank.com, and includes:

• Corporate Governance Guidelines

• Nominating and Corporate Governance Committee Charter

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• Compensation Committee Charter

• Audit Committee Charter

• Board Risk Committee Charter

• Codes of Ethics for directors, officers, and other employees

• Code of Ethics for the Chief Executive Officer and Senior Financial Officers

• Chief Executive Officer and Chief Financial Officer Certifications

We intend to disclose any waiver of or substantial amendment to the Codes of Ethics applicable to directors and executive officers on our web site at www.iberiabank.com.

Federal Taxation

We and our subsidiaries are subject to the generally applicable corporate tax provisions of the Internal Revenue Code (the “Code”), and IBERIABANK is subject to certain additional provisions of the Code that apply to financial institutions. We and our subsidiaries file a consolidated federal income tax return on the basis of a fiscal year ending on December 31.

Retained earnings at December 31, 2014 and 2013 included approximately $22 million accumulated prior to January 1, 1987 for which no provision for federal income taxes has been made. If this portion of retained earnings is used in the future for any purpose other than to absorb bad debts, it will be added to future taxable income.

The deferred tax asset at December 31, 2014 includes $376 million of future tax deductions arising from temporary differences. Included is $161 million related to book deductions for the bad debt reserve that have not been deducted for tax purposes. The deferred tax liability at December 31, 2014 includes approximately $141 million of future book deductions arising from temporary differences.

State Taxation

Louisiana does not permit the filing of consolidated income tax returns. We are subject to the Louisiana Corporation Income Tax based on our separate Louisiana taxable income, as well as a corporate franchise tax. IBERIABANK is not subject to the Louisiana income or franchise taxes. However, IBERIABANK is subject to the Louisiana Shares Tax which is imposed on the assessed value of our stock. The formula for deriving the assessed value is to calculate 15% of the sum of (a) 20% of our capitalized earnings, plus (b) 80% of our taxable shareholders’ equity, and to subtract from that figure 50% of our real and personal property assessment. Various items may also be subtracted in calculating a company’s capitalized earnings. The portion of the Louisiana shares tax expense calculated on our shareholders’ equity is included in noninterest expense, and the portion calculated on our capitalized earnings is included in income tax expense.

With respect to other states in which we operate, Arkansas generally imposes income tax on financial institutions computed at a rate of 6.5% of net earnings. For the purpose of the 6.5% income tax, net earnings are defined as the net income of the financial institution computed in the manner prescribed for computing the net taxable income for federal corporate income tax purposes, adjusted by certain modifications defined by Arkansas law.

Florida generally imposes income tax on financial institutions computed at a rate of 5.5% of net earnings. For the purpose of the 5.5% income tax, net earnings are defined as the net income of the financial institution computed in the manner prescribed for computing the net taxable income for federal corporate income tax purposes, adjusted by certain modifications defined by Florida law.

Alabama generally imposes income tax on financial institutions computed at a rate of 6.5% of net earnings. For the purpose of the 6.5% income tax, net earnings are defined as the net income of the financial institution computed in the manner prescribed for computing the net taxable income for federal corporate income tax purposes, adjusted by certain modifications defined by Alabama law.

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Tennessee generally imposes income tax on financial institutions computed at a rate of 6.5% of net earnings. For the purpose of the 6.5% income tax, net earnings are defined as the net income of the financial institution computed in the manner prescribed for computing the net taxable income for federal corporate income tax purposes, adjusted by certain modifications defined by Tennessee law.

Texas generally imposes a margin tax on financial institutions computed at a rate of 1% of margin, derived from the lowest of three separate calculations that factor gross and net revenue, as well as certain expenses, adjusted by certain modifications defined by Texas law.

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Item 1A. Risk Factors.

There are risks, many beyond our control, which could cause our results to differ significantly from management’s expectations. Some of these risk factors are described below. Any factor described in this report could, by itself or together with one or more other factors, adversely affect our business, results of operations and/or financial condition. Additional risks and uncertainties not currently known to us or that we currently consider to not be material also may materially and adversely affect us. In assessing these risks, you should also refer to other information disclosed in our SEC filings, including the financial statements and notes thereto.

Risks Associated with IBERIABANK Corporation

A return to recessionary conditions could result in increases in our level of non-performing loans and/or reduce demand for our products and services, which would lead to lower revenue, higher loan losses and lower earnings.

Although the general economic environment has shown improved since the end of the economic recession in June 2009, there can be no assurance that improvement will continue. Economic growth has been slow and uneven, unemployment remains high and concerns still exist over the federal deficit and government spending, which have contributed to diminished expectations for the economy. A return of recessionary conditions and/or continued negative developments in the domestic and international credit markets may significantly affect the markets in which we do business, the value of our loans and investments, and our ongoing operations, costs and profitability. Further declines in real estate values and sales volumes and continued high unemployment levels may result in a variety of consequences, including the following:

• increases in loan delinquencies;

• increases in nonperforming and classified assets;

• decreases in demand for our products and services; and

• decreases in the value of collateral securing our loans, especially real estate, which could result in lower recovery amounts on these loans, as well as reduce customers’ borrowing power and our ability to originate future loans.

These negative events may cause us to incur losses and may adversely affect our capital, liquidity, earnings and financial condition.

Our allowance for credit losses may not be sufficient to cover actual credit losses, which could adversely affect our earnings. If our allowance for loan losses is not sufficient to cover actual loan losses, our results of operations will be negatively impacted. Events unforeseen by us could result in higher loan losses impacting our results of operations.

We maintain an allowance for credit losses in an attempt to cover losses inherent in our loan portfolio. Additional loan losses will likely occur in the future and may occur at a rate greater than we have experienced to date.

The determination of the allowance for credit losses, which represents management’s estimate of probable losses inherent in our credit portfolio, involves a high degree of judgment and complexity. Our policy is to establish reserves for estimated losses on delinquent and other problem loans when it is determined that losses are expected to be incurred on such loans. Management’s determination of the adequacy of the allowance is based on various factors, including an evaluation of the portfolio, past loss experience, current economic conditions, the volume and type of lending conducted by us, composition of the portfolio, the amount of our classified assets, seasoning of the loan portfolio, the status of past due principal and interest payments and other relevant factors. Changes in these estimates may have a significant impact on our financial statements. If our assumptions and judgments prove to be incorrect, our current allowance may not be sufficient and adjustments may be necessary to allow for different economic conditions or adverse developments in our loan portfolio. Federal and state regulators also periodically review our allowance for loan losses and may require us to increase our provision for loan losses or recognize further loan charge-offs, based on judgments different than those of our management. Any increase in our allowance for credit losses could have an adverse effect on our operating results and financial condition.

Commercial and commercial real estate loans generally are viewed as having more risk of default than residential real estate loans or other loans or investments. These types of loans also typically are larger than

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residential real estate loans and other consumer loans. Because the loan portfolio contains a significant number of commercial and commercial real estate loans with relatively large balances, the deterioration of a material amount of these loans may cause a significant increase in nonperforming assets. An increase in nonperforming loans could result in a loss of earnings, an increase in the provision for credit losses or an increase in loan charge-offs, which would have an adverse impact on our results of operations and financial condition.

In determining the amount of the allowance for loan losses, we analyze our loss and delinquency experience by loan categories and we consider the effect of existing economic conditions. In addition, we make various assumptions and judgments about the collectability of our loan portfolio, including the creditworthiness of our borrowers and the value of the real estate and other assets serving as collateral for the repayment of many of our loans. If the results of our analyses are incorrect, our allowance for loan losses may not be sufficient to cover losses inherent in our loan portfolio, which would require additions to our allowance and would decrease our net income. Our emphasis on loan growth and on increasing our portfolio of multi-family, commercial business and commercial real estate loans, as well as any future credit deterioration, could also require us to increase our allowance further in the future.

In addition, bank regulators periodically review our allowance for loan losses and may require us to increase our provision for loan losses or recognize further loan charge-offs. Any increase in our allowance for loan losses or loan charge-offs as required by these regulatory authorities may have a material adverse effect on our results of operations and financial condition.

Additionally, changes in market factors, such as interest rates or commodity prices, could lead to increased loan losses. Changes in these and other market factors that could impact our borrowers’ (to include guarantors) abilities to repay can be significantly impacted by these changes. While management monitors these market dynamics carefully, adverse changes to these factors could be unforeseen by management and would result in higher levels of allowance and loan losses.

Adverse economic factors affecting particular industries could have a negative effect on our customers and their ability to make payments to us.

In addition to the geographic concentration of our markets, certain industry-specific economic factors also affect us. For example, approximately 8% of our total loan portfolio at December 31, 2014, was comprised of loans to borrowers in the energy industry, which is historically cyclical and recently has experienced a significant drop in crude oil prices. A severe and prolonged decline in commodity prices would adversely affect that industry and, consequently, may adversely affect our business. A downturn in segments of the commercial and residential real estate industries in our markets due to adverse economic factors affecting particular industries could also have an adverse effect on our customers.

Disruptions in the global financial markets could adversely affect our results of operations and financial condition.

Since mid-2007, global financial markets have suffered substantial disruptions, illiquidity and volatility. These circumstances resulted in significant government assistance to a number of major financial institutions. These events significantly diminished overall confidence in the financial markets and in financial institutions and increased the uncertainty we face in managing our business. If future disruptions in the financial markets or the global or our regional economic environment arise, they could have an adverse effect on our results of operations and financial condition, including our liquidity position, and may affect our ability to access capital.

The Government’s responses to economic conditions may adversely affect our financial performance.

The Federal Reserve Board, or the FRB, in an attempt to help the overall economy, has, among other things, kept interest rates low through its targeted federal funds rate and the purchase of long-term treasury and mortgage-backed securities. In October 2014, the FRB announced that it would end these purchases, but would maintain interest rates at the current low rates for a considerable time. If the FRB increases the federal funds rate, overall interest rates will likely rise, which may negatively impact the housing markets and the U.S. economic recovery. In addition, deflationary pressures, while possibly lowering our operating costs, could have a significant negative effect on our borrowers, especially our business borrowers, and the values of collateral securing loans, which could negatively affect our financial performance.

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The Dodd-Frank Act and related rules and regulations may adversely affect our business, financial condition and results of operations.

The Dodd-Frank Act contains a variety of far-reaching changes and reforms for the financial services industry and directed federal regulatory agencies to study the effects of, and to issue implementing regulations for, these reforms. Many of the provisions of the Dodd-Frank Act could have a direct effect on our performance and, in some cases, impact our ability to conduct business. Examples of these provisions include, but are not limited to:

• Creation of the Financial Stability Oversight Counsel that may recommend to the FRB increasingly strict rules for capital, leverage, liquidity, risk management and other requirements as companies grow in size and complexity;

• Application of the same leverage and risk-based capital requirements that apply to insured depository institutions to most bank holding companies, such as IBERIABANK Corporation;

• Changes to the assessment base used by the FDIC to assess insurance premiums from insured depository institutions and increases to the minimum reserve ratio for the Deposit Insurance Fund (“DIF”), from 1.15% to not less than 1.35%, with provisions to require institutions with total consolidated assets of $10 billion or more, like us, to bear a greater portion of the costs associated with the increasing the DIF’s reserve ratio;

• Repeals of the federal prohibitions on the payment of interest on demand deposits, thereby permitting depository institutions to pay interest on business transaction and other accounts;

• Establishment of the Consumer Financial Protection Bureau, or CFPB, with broad authority to implement and enforce consumer protection regulations, including the authority to prohibit “unfair, deceptive, and abusive practices.” For bank holding companies with $10 billion or more in assets, like IBERIABANK Corporation, the CFPB has the power to examine and enforce compliance with consumer protection laws.

• Implementation of risk retention rules for loans (excluding qualified residential mortgages) that are sold by a bank; and

• Amendment of the Electronic Fund Transfer Act to, among other things, authorize the FRB to issue rules limiting debit-card interchange fees (referred to as the “Durbin Amendment”).

Many of these provisions have already been the subject of proposed and final rulemakings. Many other provisions, however, remain subject to regulatory rulemaking and implementation, the effects of which are not yet known. The provisions of the Dodd-Frank Act and any rules adopted to implement those provisions, as well as any additional legislative or regulatory changes, may impact the profitability of our business activities, may require that we change certain of our business practices, may materially affect our business model or affect retention of key personnel, may require us to raise additional capital and could expose us to additional costs (including increased compliance costs). These and other changes may also require us to invest significant management attention and resources to make any necessary changes and may adversely affect our ability to conduct our business as previously conducted or our financial condition and results of operations.

We are required to submit a stress test under the Dodd Frank Act the results of which could significantly impact our ability to approve declare and pay dividends to shareholders, acquire other financial institutions and/or execute our growth strategy.

The Dodd Frank Act requires us to submit a stress test to the FRB that projects the Company’s performance under various economic scenarios provided by the FRB. We are required to make certain assumptions in modeling future performance and must support these assumptions through statistical analysis and observed market behavior where applicable. The outcome of the FRB’s analysis of the Company’s projected performance (to include capital, earnings, and balance sheet changes) could hinder our ability to pay cash dividends to shareholders as has been the Company’s practice. The results of the stress test could also impact the FRB’s future decision making regarding future acquisitions by the Company.

Our ability to achieve expense reduction and earnings enhancement initiatives may be adversely affected by external factors not within our control.

We continue to assess and implement a number of expense reduction and revenue enhancing initiatives that, are expected to result in estimated annual incremental run-rate benefits. While many of the elements necessary to achieve these initiatives are within our control, others such as interest rates and prevailing economic conditions, which influence expenses and revenues, depend on external factors not within our control, and there can be no assurance that external factors will not materially adversely affect our ability to fully implement and accomplish these initiatives.

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Changes in interest rates and other factors beyond our control may adversely affect our earnings and financial condition, and we may incur losses if we are unable to successfully manage interest rate risk.

Our profitability depends to a large extent on IBERIABANK’s net interest income, which is the difference between income on interest-earning assets, such as loans and investment securities, and expense on interest-bearing liabilities, such as deposits and borrowings. We are unable to predict changes in market interest rates, which are affected by many factors beyond our control, including inflation, recession, unemployment, money supply, competition for loans and deposits, domestic and international events and changes in the United States and other financial markets. Our net interest income may be reduced if more interest-earning assets than interest-bearing liabilities reprice or mature during a period when interest rates are declining, or more interest-bearing liabilities than interest-earning assets reprice or mature during a period when interest rates are rising.

Changes in the difference between short- and long-term interest rates may also harm our business. For example, short-term deposits may be used to fund longer-term loans. When differences between short-term and long-term interest rates shrink or disappear, as is likely in the current low interest rate policy environment, the spread between rates paid on deposits and received on loans could narrow significantly, decreasing our net interest income.

If market interest rates rise rapidly, interest rate adjustment caps may limit increases in interest rates on adjustable rate loans, thereby reducing our net interest income.

We attempt to manage our risk from changes in market interest rates by adjusting the rates, maturity, repricing, and balances of the different types of interest-earning assets and interest-bearing liabilities, but interest rate risk management techniques are not exact. We employ the use of models and modeling techniques to quantify the level of risk to net interest income, which inherently involve the use of judgments and estimates. While we strive to ensure the accuracy of our modeled interest rate risk profile, there are inherent limitations and imprecisions in this determination and actual results will differ. As of December 31, 2014, our interest rate risk model indicated we are fairly balanced over a 12-month time frame. A 100 basis point instantaneous and parallel upward shift in interest rates at December 31, 2014, was estimated to increase net interest income over 12 months by approximately 4.5%. Similarly, a 100 basis point decrease in interest rates was expected to decrease net interest income by 2.0%. At December 31, 2014, approximately 49% of our total loan portfolio had fixed interest rates. Eliminating fixed rate loans that mature within a one-year time frame increases this percentage to 77%. Approximately 61% of our time deposit base will re-price within 12 months from December 31, 2014.

The required accounting treatment of troubled loans we acquired through acquisitions could result in higher net interest margins and interest income in current periods and lower net interest margins and interest income in future periods.

Under U.S. GAAP, we are required to record troubled loans acquired through acquisitions at fair value, which may underestimate the actual performance of such loans. As a result, if these loans outperform our original fair value estimates, the difference between our original estimate and the actual performance of the loan (the “discount”) is accreted into net interest income. Thus, our net interest margins may initially appear higher. We expect the yields on our loans to decline as our acquired loan portfolio pays down or matures, and we expect downward pressure on our interest income to the extent that the runoff on our acquired loan portfolio is not replaced with comparable high-yielding loans. This could result in higher net interest margins and interest income in current periods and lower net interest rate margins and lower interest income in future periods.

We obtain a significant portion of our noninterest revenue through service charges on core deposit accounts. Regulations impacting service charges, changes in customer behavior, and increased competition could reduce our fee income.

A significant portion of our noninterest revenue is derived from service charge income. The largest component of this service charge income is overdraft-related fees. Management anticipates that changes in banking regulations, and in particular the FRB’s rules pertaining to certain overdraft payments on consumer accounts and the FDIC’s Overdraft Payment Programs and Consumer Protection Final Overdraft Payment Supervisory Guidance, will have an adverse impact on our service charge income. Additionally, changes in customer behavior, as well as increased competition from other financial institutions, may result in declines in deposit accounts or in overdraft frequency resulting in a decline in service charge income. A reduction in deposit account fee income could have a material adverse effect on our earnings.

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We earn a significant portion of our noninterest revenue through sales of residential mortgages in the secondary market. We are exposed to counterparty credit, market, repurchase and other risks associated with these activities.

Our noninterest revenue attributable to mortgage banking activities has grown significantly in recent years. The Company is exposed to counterparty credit risk in the normal course of these sales activities as well as market risk when engaging in this activity that is greatly impacted by the amount of liquidity in the secondary markets and changes in interest rates. Additionally, the Company retains repurchase risk associated with sales of these loans that is related to the Company’s residential mortgage loan underwriting and closing practices. Increases in claims under these repurchase or make-whole demands could have a material impact on our ability to continue participating in these types of activities as well as materially impact our financial condition, results of operations, and cash flows.

We may be required to pay significantly higher FDIC deposit insurance premiums or special assessments if the number of bank failures increases, or the cost of resolving failed banks increases, which could adversely affect our earnings.

Market developments have significantly depleted the insurance fund of the FDIC and reduced the ratio of reserves to insured deposits. As a result, we may be required to pay significantly higher premiums or additional special assessments that could adversely affect our earnings. We are generally unable to control the amount of premiums that we are required to pay for FDIC insurance. If there are additional bank or financial institution failures, we may be required to pay even higher FDIC premiums. Any future increases or required prepayments in FDIC insurance premiums may materially adversely affect our results of operations.

The FRB’s repeal of prohibitions against payment of interest on demand deposits may increase competition for such deposits and ultimately increase interest expense.

A major portion of our net income comes from our interest rate spread, which is the difference between the interest rates paid by us on amounts used to fund assets and the interest rates and fees we receive on our interest-earning assets. Our interest-earning assets include outstanding loans extended to our customers and securities held in our investment portfolio. We fund assets using deposits and other borrowings. As of December 31, 2014 we maintained approximately 26% of our deposits as non-interest-bearing.

Banks and thrifts are now permitted to offer interest-bearing demand deposit accounts to commercial customers, which were previously forbidden. The repeal of Regulation Q may cause increased competition from other financial institutions for these deposits. If we decide to pay interest on demand accounts, we would expect our interest expense to increase. Although Regulation Q has been effective for over two years, the impact may not have been realized yet because of the current low interest rate policy environment.

As with other regulated financial institutions, we may become subject to more stringent regulatory capital requirements that limit our operations and potential growth, and which may result in regulatory action.

IBERIABANK Corporation and IBERIABANK are subject to the comprehensive, consolidated supervision and regulation of the FRB, including risk-based and leverage capital requirements. We must maintain certain risk-based and leverage capital ratios as required by our banking regulators, which can change depending on general economic conditions and IBERIABANK Corporation’s particular condition, risk profile, growth plans, and regulatory capital adequacy guidelines. If at any time we fail to meet minimum established capital guidelines and/or other regulatory requirements, our financial condition would be materially and adversely affected.

In July 2013, U.S. banking regulatory agencies, including the FRB, approved a final rule to implement the revised capital adequacy standards of the Basel Committee, or “Basel III”, and to address relevant provisions of the Dodd-Frank Act. We became subject to the new rule on January 1, 2015, and certain provisions of the new rule will be phased in from that date to January 1, 2019.

The final rule:

• Permits banking organizations that had less than $15 billion in total consolidated assets as of December 31, 2009, to include as Tier 1 capital trust preferred securities and cumulative perpetual preferred stock that were issued and included as Tier 1 capital prior to May 19, 2010, subject to a limit of 25% of Tier 1 capital elements, excluding any non-qualifying capital instruments and after all regulatory capital deductions and adjustments have been applied to Tier 1 capital,

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• Requires banking organizations that achieve $15 billion or more in total assets after December 31, 2009 to phase-out of Tier 1 capital trust preferred securities and include these securities as Tier 2 capital;

• Establishes new qualifying criteria for regulatory capital, including new limitations on the inclusion of deferred tax assets and mortgage servicing rights;

• Requires a minimum of ratio of common equity Tier 1, or CET1, capital to risk-weighted assets of 4.5%;

• Increases the minimum Tier 1 capital to risk-weighted assets ratio requirements from 4% to 6%;

• Retains the minimum total capital to risk-weighted assets ratio requirement of 8%;

• Establishes a minimum leverage ratio requirement of 4%;

• Retains the existing regulatory capital framework for 1-4 family residential mortgage exposures;

• Implements a new capital conservation buffer requirement for a banking organization to maintain a CET1 capital ratio more than 2.5% above the minimum CET1 capital, Tier 1 capital and total risk-based capital ratios in order to avoid limitations on capital distributions, including dividend payments, and certain discretionary bonus payments to executive officers. The capital conservation buffer requirement will be phased in beginning on January 1, 2016 at 0.625%, and will be fully phased in at 2.50% by January 1, 2019. A banking organization with a buffer of less than the required amount would be subject to increasingly stringent limitations on such distributions and payments as the buffer approaches zero. The new rule also generally prohibits a banking organization from making such distributions or payments during any quarter if its eligible retained income is negative and its capital conservation buffer ratio was 2.5% or less at the end of the previous quarter. The eligible retained income of a banking organization is defined as its net income for the four calendar quarters preceding the current calendar quarter, based on the organization’s quarterly regulatory reports, net of any distributions and associated tax effects not already reflected in net income;

• Increases capital requirements for past-due loans, high volatility commercial real estate exposures, and certain short-term commitments and securitization exposures;

• Expands the recognition of collateral and guarantors in determining risk-weighted assets; and

• Removes references to credit ratings consistent with the Dodd-Frank Act and establishes due diligence requirements for securitization exposures.

We continue to evaluate the provisions of the final rule and their expected impact on us. Management believes that at December 31, 2014, IBERIABANK Corporation and IBERIABANK would have met all new capital adequacy requirements on a fully phased-in basis if such requirements were then effective. However, there can be no assurances that the Basel III capital rules will not be revised before the effective dates and expiration of the phase-in periods. The final impact of the new capital and liquidity standards on us cannot be determined at this time and depend on a number of factors, including the treatment and implementation by U.S. banking regulators. These new requirements, however, and any other new regulations, could result in lower returns, result in regulatory actions if we were unable to comply with such requirements, and adversely affect our ability to pay dividends or repurchase

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shares, or to raise capital, including in ways that may adversely affect our financial condition or results of operations. Compliance with current or new capital requirements, including leverage ratios, may limit operations that require the intensive use of capital and could adversely affect our ability to expand or maintain present business levels.

Our capital levels are impacted by the regulatory changes associated with Basel III and could necessitate a capital raise that could dilute common shareholders. Our recent growth and financial performance could be negatively impacted in the future if we are unable to execute our growth strategy, which could be constrained by capital.

The Basel III capital rules will negatively impact our Tier 1 capital ratio, as our assets following the anticipated Florida Bank Group, Inc. acquisition will exceed $15 billion. This will trigger the phase out of our Trust Preferred Securities from Tier 1 Capital. Satisfying such new capital standards could materially impact us relative to our smaller peers. While the capital conservation buffer requirement is expressed as a range in the final rule, the appropriate level of such buffer (1) is open to interpretation on an institution-by-institution basis by the U.S. banking regulators and is therefore outside of our control and (2) could adversely impact our ability to deliver historical returns in future periods and may require us to raise additional capital that would dilute common shareholders.

Our ability to achieve growth in income producing assets is significantly impacted by our overall capital levels. Additionally, our current and projected required capital levels are impacted by the balance of risk-weighted asset growth and organic capital generation, which could become disintermediated and cause us to raise capital and dilute common shareholders.

Our recent growth and financial performance will be negatively impacted if we are unable to execute our growth strategy.

Our stated strategy is to grow organically and supplement that growth with select acquisitions. Our success depends primarily on generating loans and deposits of acceptable risk and expense. There can be no assurance that we will be successful in continuing our organic, or internal, growth strategy. Our ability to identify appropriate markets for expansion, recruit and retain qualified personnel, and fund growth at a reasonable cost, depends upon prevailing economic conditions, maintenance of sufficient capital, competitive factors, changes in banking laws, and other factors.

Supplementing our internal growth through acquisitions is an important part of our strategic focus. Since 1995, approximately 65% of our asset growth has been through acquisitions, or external growth. Our acquisition efforts focus on select markets and targeted entities. We operate in markets we consider to be contiguous, or natural extensions, to our current markets. As consolidation of the banking industry continues, the competition for suitable acquisition candidates may increase. We compete with other banking organizations for acquisition opportunities, and many of these competitors have greater financial resources than we do and may be able to pay more for an acquisition than we are able or willing to pay. We also may need additional debt or equity financing in the future to fund acquisitions. We may not be able to obtain additional financing or, if available, it may not be in amounts and on terms acceptable to us. Our issuance of additional equity securities would dilute existing shareholders’ interest in us and may have a dilutive effect on our earnings per share. If we are unable to locate suitable acquisition candidates willing to combine with us on terms acceptable to us, or we are otherwise unable to obtain additional debt or equity financing necessary for us to continue making acquisitions, we would be required to find other methods to grow our business, and we may not grow at the same rate we have grown in the past, or at all.

We cannot be certain as to our ability to manage increased levels of assets and liabilities without increased expenses and higher levels of nonperforming assets. We may be required to make additional investments in equipment and personnel to manage higher asset levels and loan balances, which may adversely affect earnings, shareholder returns, and our efficiency ratio. Increases in operating expenses or nonperforming assets may decrease our earnings and the value of our common stock.

In addition to the normal operating challenges inherent in managing a larger financial institution, each of our acquisitions and potential future acquisitions is subject to appropriate regulatory approval. Our regulators may require that we demonstrate that we have appropriately integrated our prior acquisitions, or any future acquisitions we may do, before permitting us to engage in any future material acquisitions.

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Like most banking organizations, our business is highly susceptible to credit risk.

As a lender, we are exposed to the risk that our customers will be unable to repay their loans according to their terms and that the collateral securing the payment of their loans (if any) may not be sufficient to satisfy defaulted loan obligations. Credit losses could have a material adverse effect on our operating results.

As of December 31, 2014, our total loan portfolio was approximately $11.4 billion, or 73% of total assets. At that date, the major components of our loan portfolio included 68% of commercial loans, both real estate and business, 9% of mortgage loans comprised primarily of residential 1-4 family mortgage loans, and 23% of consumer loans. Our credit risk with respect to our consumer installment and commercial loan portfolios relates principally to the general creditworthiness of individuals and businesses within our local market areas. Our credit risk with respect to our residential and commercial real estate mortgage and construction loan portfolios relates principally to the general creditworthiness of individuals and businesses and the value of real estate serving as security for the repayment of the loans. A related risk in connection with loans secured by commercial real estate is the effect of unknown or unexpected environmental contamination, which could make the real estate effectively unmarketable or otherwise significantly reduce its value as security, or could expose us to remediation liabilities as the lender.

Our loan portfolio has been and will continue to be affected by real estate markets, including the overall level of home sales, which can impact the performance of loans.

Although real estate market fundamentals have generally improved, the aftermath of the housing slowdown continues to impact some of our market areas. We expect the home builder market to continue to be volatile and anticipate continuing pressure on the home builder segment. In addition, many banking institutions, including us, have experienced declines in the performance of other loans, including construction, land development and land loans and commercial loans. We make credit and reserve decisions based on the current conditions of borrowers or projects combined with our expectations for the future. If another slowdown in the housing markets was to occur, we could experience higher charge-offs and delinquencies beyond that which is provided in the allowance for loan losses. As such, our earnings could be adversely affected through higher than anticipated provisions for loan losses.

If we or our subsidiaries were unable to borrow funds through access to capital markets, we may not be able to meet the cash flow requirements of our depositors and borrowers, or the operating cash needs to fund corporate expansion and other corporate activities.

Liquidity is the ability to meet cash flow needs on a timely basis at a reasonable cost. IBERIABANK’s liquidity primarily is used to make loans and leases and to repay deposit liabilities as they become due or are demanded by customers. Liquidity policies and limits are established by our board of directors. Management and the Investment Committee regularly monitor the overall liquidity position of IBERIABANK and IBERIABANK Corporation to ensure that various alternative strategies exist to cover unanticipated events that could affect liquidity. Management and the Investment Committee also establish policies and monitor guidelines to diversify IBERIABANK’s funding sources to avoid concentrations in any one market source. Funding sources include Federal funds purchased, securities sold under repurchase agreements, non-core deposits, and short- and long-term debt. IBERIABANK is also a member of the Federal Home Loan Bank, or FHLB System, which provides funding through advances to members that are collateralized with mortgage-related assets.

We maintain a portfolio of securities that can be used as a secondary source of liquidity. There are other sources of liquidity available to us should they be needed. These sources include sales or securitizations of loans, our ability to acquire additional national market, non-core deposits, additional collateralized borrowings such as FHLB advances, the issuance and sale of debt securities, and the issuance and sale of preferred or common securities in public or private offerings. IBERIABANK also can borrow from the FRB’s discount window.

Amounts available under our existing credit facilities as of December 31, 2014, consist of $2.2 billion in FHLB notes and $155 million in the form of federal funds and other lines of credit.

If we were unable to access any of these funding sources when needed, we might be unable to meet customers’ needs, which could adversely impact our financial condition, results of operations, cash flows, and level of regulatory-qualifying capital. For further discussion, see Note 16 to the consolidated financial statements in this Report.

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Additionally, the Company is often the recipient of dividends from its subsidiaries, including IBERIABANK, and may rely on these dividends as a source of cash flow. The amount of future dividends from IBERIABANK is dependent upon its performance and could be impacted by future unanticipated regulatory limitations. Such events could impact the Company’s ability to issue future dividends and ultimate solvency if other sources of cash flows were not available.

If our investment in the common stock of the Federal Home Loan Bank of Dallas is classified as other-than-temporarily impaired or as permanently impaired, our earnings and stockholders’ equity could decrease.

We hold FHLB stock to qualify for membership in the Federal Home Loan Bank System and to be eligible to borrow funds under the FHLB advance program. The aggregate cost and fair value of our FHLB common stock as of December 31, 2014 was $38 million based on its par value. There is no market for FHLB common stock.

Published reports indicate that certain member banks of the Federal Home Loan Bank System may be subject to accounting rules and asset quality risks that could result in materially lower regulatory capital levels. In an extreme situation, it is possible that the capital of a FHLB could be substantially diminished or reduced to zero. Consequently, we believe that there is a risk that our investment in FHLB common stock could be impaired at some time in the future, and if this occurs, it would cause our earnings and stockholders’ equity to decrease by the after-tax amount of the impairment charge.

Declines in the value of certain investment securities could require write-downs, which would reduce our earnings.

Our securities portfolio includes securities that are subject to declines in value due to negative perceptions about the health of the financial sector in general and the lack of liquidity for securities that are real estate related. A prolonged decline in the value of these or other securities could result in an other-than-temporary impairment write-down, which would reduce our earnings. Additionally, while accumulated other comprehensive income (“AOCI”) is not currently deducted from regulatory capital under the existing regulatory capital framework, the new Basel III rules require that AOCI be included in the computation of capital and related ratios. Currently, we are of a size that enables us to opt-out of including AOCI in the computation of regulatory capital beginning with our Call report for the quarter ending March 31, 2015. To the extent that we do not opt-out, our regulatory capital and related ratios could be subject to market value adjustments of our securities portfolio and any other current or future measurements that GAAP requires or could require be recognized in including AOCI in the capital and related ratio computations.

We face risks related to our operational, technological and organizational infrastructure.

Our ability to grow and compete is dependent on our ability to build or acquire the necessary operational and technological infrastructure and to manage the cost of such expanded infrastructure. Similar to other large corporations, in our case, operational risk can manifest itself in many ways, such as errors related to failed or inadequate processes, faulty or disabled computer systems, fraud by employees or outside persons and exposure to external events. As discussed below, we are dependent on our operational infrastructure to help manage these risks. In addition, we are heavily dependent on the strength and capability of our technology systems, which we use both to interface with our customers and to manage our internal financial and other systems. Our ability to develop and deliver new products that meet the needs of our existing customers and attract new ones depends on the functionality of our technology systems. Additionally, our ability to run its business in compliance with applicable laws and regulations is dependent on these infrastructures.

We continuously monitor our operational and technological capabilities and make modifications and improvements when we believe it will be cost effective to do so. In some instances, we may build and maintain these capabilities internally.

We outsource some of these functions to third parties who may experience errors or disruptions that could adversely impact us and over which we may have limited control.

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The failure of other companies to adequately provide key components of our business infrastructure could adversely affect our operations and revenues.

While we have selected third party vendors carefully and our agreements include requirements regarding the levels of their service quality, we ultimately do not control their actions. Any problems caused by these third parties, including those that result from their failure to provide services for any reason or their poor performance of services, could adversely affect our ability to deliver products and services to our customers and otherwise to conduct our business. Replacing these third party vendors could also entail significant delay and expense.

We also face risk from the integration of new infrastructure platforms and/or new third party providers of such platforms into our existing businesses.

A failure in or an attack on our operational systems or infrastructure, or those of third parties, could impair our liquidity, disrupt our businesses, result in the unauthorized disclosure of confidential information, damage our reputation and cause financial losses.

Our businesses are dependent on their ability to process and monitor, on a daily basis, a large number of transactions, many of which are highly complex, across numerous and diverse markets. These transactions, as well as the information technology services we provide to clients, often must adhere to client-specific guidelines, as well as legal and regulatory standards. Due to the breadth of our client base and our geographical reach, developing and maintaining our operational systems and infrastructure is challenging, particularly as a result of rapidly evolving legal and regulatory requirements and technological shifts. Our financial, accounting, data processing or other operating systems and facilities may fail to operate properly or become disabled as a result of events that are wholly or partially beyond our control, such as a spike in transaction volume, cyber attack or other unforeseen catastrophic events, which may adversely affect our ability to process these transactions or provide the impaired services.

In addition, our operations rely on the secure processing, storage and transmission of confidential and other information on our computer systems and networks. Although we take protective measures to maintain the confidentiality, integrity and availability of our and our clients’ information across all geographic and product lines, and endeavor to modify these protective measures as circumstances warrant, the nature of the threats continues to evolve. As a result, our computer systems, software and networks may be vulnerable to unauthorized access, loss or destruction of data (including confidential client information), account takeovers, unavailability of service, computer viruses or other malicious code, cyber attacks and other events that could have an adverse security impact. Despite the defensive measures we take to manage our internal technological and operational infrastructure, these threats may originate externally from third parties such as foreign governments, organized crime and other hackers, and outsource or infrastructure-support providers and application developers, or may originate internally from within our organization. Given the increasingly high volume of our transactions, certain errors may be repeated or compounded before they can be discovered and rectified.

We also face the risk of operational disruption, failure, termination or capacity constraints of any of the third parties that facilitate our business activities, including exchanges, clearing agents, clearing houses or other financial intermediaries. Such parties could also be the source of an attack on, or breach of, our operational systems, data or infrastructure. In addition, as interconnectivity with our clients grows, we increasingly face the risk of operational failure with respect to our clients’ systems.

If one or more of these cyber incidents occurs, it could potentially jeopardize the confidential, proprietary and other information processed and stored in, and transmitted through, our computer systems and networks, or otherwise cause interruptions or malfunctions in our, as well as our clients’ or other third parties’ operations, which could result in damage to our reputation, substantial costs, regulatory penalties and/or client dissatisfaction or loss. Potential costs of a cyber incident may include, but would not be limited to, remediation costs, increased protection costs, lost revenue from the unauthorized use of proprietary information or the loss of current and/or future customers, and litigation.

We maintain an insurance policy which we believe provides sufficient coverage at a manageable expense for an institution of our size and scope with similar technological systems. However, no assurance can be given that this policy would be sufficient to cover all potential financial losses, damages, penalties, including lost revenues, should we experience any one or more of our or a third party’s systems failing or experiencing attack.

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We assume certain additional risks associated with credit card lending and debit cards.

Primary risks associated with credit card lending include: (i) credit risk – borrower may hold several credit cards from different issuers, pay only minimum monthly payments and become overextended; (ii) transaction risk – credit card operations are highly automated, have a large transaction volume, are vulnerable to unauthorized access and require strong operational controls; (iii) liquidity risk – credit card obligations require available sources to fund unusual commitments; (iv) strategic risk – each new credit card product and service must be properly evaluated before it is offered; (v) reputation risk – poorly underwritten or performing credit card receivables can affect a bank’s reputation as an underwriter; (vi) re-pricing risk – arises from differences between the timing of interest rate changes and the timing of cash flows; and (vii) compliance risk – consumer laws and regulators, including fair lending and other anti-discrimination laws, rules and regulations affect all aspects of credit card lending.

Across the industry, bad debt and fraud losses in credit and debit cards have risen when compared to historical levels. Reasons for increased losses include changes in underwriting standards, mass marketing of cards in a saturated market, consumer bankruptcies and economic factors, as well as evolving schemes to illegally use cards despite risk management practices employed by us and the card industry. We believe that we have established an effective collection process and other internal controls to minimize such losses.

The loss of certain key personnel could negatively affect our operations.

Although we have employed a significant number of additional executive officers and other key personnel, our success continues to depend in large part on the retention of a limited number of key executive management, lending and other banking personnel. We could undergo a difficult transition period if it were to lose the services of any of these individuals. Our success also depends on the experience of our banking facilities’ managers and lending officers and on their relationships with the customers and communities they serve. The loss of these key persons could negatively impact the affected banking operations. The unexpected loss of key senior managers, or the inability to recruit and retain qualified personnel in the future, could have an adverse effect on our business, financial condition, or operating results.

Competition may decrease our growth or profits.

We compete for loans, deposits, title business and investment dollars with other banks and other financial institutions and enterprises, such as securities firms, insurance companies, savings associations, credit unions, mortgage brokers, private lenders and title companies, many of which have substantially greater resources than we do. Credit unions have federal tax exemptions that may allow them to offer lower rates on loans and higher rates on deposits than taxpaying financial institutions such as commercial banks. In addition, non-depository institution competitors are generally not subject to the extensive regulation applicable to institutions, like IBERIABANK, that offer federally insured deposits. Other institutions may have other competitive advantages in particular markets or may be willing to accept lower profit margins on certain products. These differences in resources, regulation, competitive advantages, and business strategy may decrease our net interest margin, may increase our operating costs, and may make it harder for us to compete profitably.

Reputational risk and social factors may impact our results.

Our ability to originate and maintain accounts is highly dependent upon consumer and other external perceptions of our business practices and/or our financial health. Adverse perceptions regarding our business practices and/or our financial health could damage our reputation in both the customer and funding markets, leading to difficulties in generating and maintaining accounts as well as in financing them. Adverse developments with respect to the consumer or other external perceptions regarding the practices of our competitors, or our industry as a whole, may also adversely impact our reputation. In addition, adverse reputational impacts on third parties with whom we have important relationships may also adversely impact our reputation. Adverse impacts on our reputation, or the reputation of our industry, may also result in greater regulatory and/or legislative scrutiny, which may lead to laws or regulations that may change or constrain the manner in which we engage with our customers and the products we offer. Adverse reputational impacts or events may also increase our litigation risk. We carefully monitor internal and external developments for areas of potential reputational risk and have established governance structures to assist in evaluating such risks in our business practices and decisions.

We may be subject to increased litigation which could result in legal liability and damage to our reputation.

IBERIABANK Corporation and IBERIABANK have been named from time to time as defendants in class actions and other litigation relating to our businesses and activities. Litigation may include claims for substantial

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compensatory or punitive damages or claims for indeterminate amounts of damages. We and our subsidiaries are also involved from time to time in other reviews, investigations and proceedings (both formal and informal) by governmental and self-regulatory agencies regarding our business. These matters also could result in adverse judgments, settlements, fines, penalties, injunctions or other relief.

In addition, in recent years, a number of judicial decisions have upheld the right of borrowers to sue lending institutions on the basis of various evolving legal theories, collectively termed “lender liability.” Generally, lender liability is founded on the premise that a lender has either violated a duty, whether implied or contractual, of good faith and fair dealing owed to the borrower or has assumed a degree of control over the borrower resulting in the creation of a fiduciary duty owed to the borrower or its other creditors or shareholders.

Substantial legal liability or significant regulatory action against us, including our subsidiaries, could materially adversely affect our business, financial condition or results of operations, or cause significant harm to our reputation. Additional information relating to litigation is discussed in Note 21 (“Commitments and Contingencies”) to the consolidated financial statements, and in Part I, Item 3 (“Legal Proceedings”) of this Report.

Changes in government regulations and legislation could limit our future performance and growth.

The banking industry is heavily regulated. We are subject to examination, supervision and comprehensive regulation by various federal and state agencies. Our compliance is costly and restricts certain of our activities. Banking regulations are primarily intended to protect the federal deposit insurance fund and depositors, not shareholders. The burdens imposed by federal and state regulations put banks at a competitive disadvantage compared to less regulated competitors, such as finance companies, mortgage banking companies and leasing companies. Changes in the laws, regulations and regulatory practices affecting the banking industry may increase our costs of doing business or otherwise adversely affect us and create competitive advantages for others. Regulations affecting banks and financial services companies undergo continuous change and are subject to interpretation. We cannot predict the ultimate effect of these changes or interpretations, which could have a material adverse effect on our profitability or financial condition. Federal economic and monetary policies may also negatively impact our ability to attract deposits and other funding sources, make loans and investments, and achieve satisfactory interest spreads.

The geographic concentration of our markets makes our business highly susceptible to local economic conditions.

Unlike larger organizations that are more geographically diversified, our offices are primarily concentrated in selected markets in Louisiana, Alabama, Arkansas, Florida, Tennessee and Texas. As a result of this geographic concentration, our financial results depend largely upon economic conditions in these market areas. Deterioration in economic conditions in the markets we serve could result in one or more of the following:

• an increase in loan delinquencies;

• an increase in problem assets and foreclosures;

• a decrease in the demand for our products and services; and

• a decrease in the value of collateral for loans, especially real estate, in turn reducing customers’ borrowing power, the value of assets associated with problem loans and collateral coverage.

Hurricanes or other adverse weather events could negatively affect our local economies or disrupt our operations, which would have an adverse effect on our business or results of operations.

Many of our markets are located in coastal areas and are susceptible to hurricanes and tropical storms. Such weather events can disrupt our operations, result in damage to our properties and negatively affect the local economies in which we operate. We cannot predict whether or to what extent damage that may be caused by future hurricanes or other weather events will affect our operations or the economies in our market areas, but such weather events could result in a decline in loan originations, a decline in the value or destruction of properties securing our loans and an increase in payment delinquencies, foreclosures and loan losses. Our business or results of operations may be adversely affected by these and other negative effects of hurricanes or other significant weather events.

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We face substantial competition and are subject to certain regulatory constraints not applicable to some of our competitors.

We face substantial competition for deposit, and for credit, title and trust relationships, and other financial services and products in the communities we serve. Competing providers include other banks, thrifts and trust companies, insurance companies, mortgage banking operations, credit unions, finance companies, title companies, money market funds and other financial and nonfinancial companies which may offer products functionally equivalent to those offered by us. Competing providers may have greater financial resources than we do and offer services within and outside the market areas we serve. In addition to this challenge of attracting and retaining customers for traditional banking services, our competitors include securities dealers, brokers, mortgage bankers, investment advisors and finance and insurance companies who seek to offer one-stop financial services to their customers that may include services that financial institutions have not been able or allowed to offer to their customers in the past. The increasingly competitive environment is primarily a result of changes in regulation, changes in technology and product delivery systems and the accelerating pace of consolidation among financial service providers. If we are unable to adjust both to increased competition for traditional banking services and changing customer needs and preferences, our financial performance could be adversely affected.

Some of our competitors, including credit unions, are not subject to certain regulatory constraints, such as the Community Reinvestment Act, which, among other things, requires us to implement procedures to make and monitor loans throughout the communities we serve. Complying with these regulatory requirements increases the costs associated with our lending activities, including underwriting expenses, and reduces potential operating profits.

We are exposed to intangible asset risk which could negatively impact our financial results.

In accordance with GAAP, we record assets acquired and liabilities assumed at their fair value, and, as such, acquisitions typically result in recording goodwill. We perform a goodwill evaluation at least annually to test for goodwill impairment. As part of its testing, the Company first assesses qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If the Company determines the fair value of a reporting unit is less than its carrying amount using these qualitative factors, the Company then compares the fair value of goodwill with its carrying amount, and then measures impairment loss by comparing the implied fair value of goodwill with the carrying amount of that goodwill. Adverse conditions in our business climate, including a significant decline in future operating cash flows, a significant change in our stock price or market capitalization, or a deviation from our expected growth rate and performance may significantly affect the fair value of our goodwill and may trigger additional impairment losses, which could be materially adverse to our operating results and financial position.

We completed such an evaluation for the Company during the fourth quarter of 2014 and concluded that an impairment charge was not necessary for the year ended December 31, 2014. We cannot provide assurance, however, that we will not be required to take an impairment charge in the future. Any impairment charge has an adverse effect on our shareholders’ equity and financial results and could cause a decline in our stock price.

Our reported financial results depend on our management’s selection of accounting methods and certain assumptions and estimates, and there may be changes in accounting policies or accounting standards that could adversely affect our financial condition and results of operations.

Our accounting policies and assumptions are fundamental to our reported financial condition and results of operations. Our management must exercise judgment in selecting and applying many of these accounting policies and methods so they comply with generally accepted accounting principles and reflect management’s judgment of the most appropriate manner to report our financial condition and results. Our management must also exercise judgment in selecting assumptions and estimates inherent in deriving certain financial statement line items. In some cases, management must select the accounting policy, method, assumption and/or estimate to apply from two or more alternatives, any of which may be reasonable under the circumstances, yet may result in our reporting materially different results than would have been reported under a different alternative.

From time to time the Financial Accounting Standards Board and the SEC change the financial accounting and reporting standards that govern the form and content of our external financial statements. Recently, FASB has proposed new accounting standards related to fair value accounting and accounting for leases that could materially change our financial statements in the future. In addition, accounting standard setters and those who interpret the accounting standards (such as the FASB, SEC, banking regulators and our independent registered auditors) may change or even reverse their previous interpretations or positions on how these standards should be applied. Changes in financial accounting and reporting standards and changes in current interpretations may be beyond our control, can be hard to predict and could materially impact how we report our financial results and condition. In certain cases, we could be required to apply a new or revised standard retroactively or apply an existing standard differently (also retroactively) which may result in it restating prior period financial statements in material amounts.

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Risks Related Bank Acquisitions and FDIC-assisted Transactions

Acquisition opportunities may not become available, and increased competition could make it more difficult for us to bid on transactions on terms we consider to be acceptable.

A part of our business strategy is to pursue acquisitions, which may include failing banks that are placed into FDIC receivership. The availability of acquisition candidates that meet our strategic objectives can fluctuate, and current institutions for sale in the market may not meet our strategic objectives. Such circumstances would limit our ability to supplement our growth through acquisitions.

Different from non-FDIC assisted transactions, failed bank transactions typically include loss share arrangements with the FDIC that limit our downside risk on the purchased loan portfolio and, apart from our assumption of deposit liabilities, we have significant discretion as to the non-deposit liabilities that we assume. The terms of loss sharing arrangements may change, making FDIC-assisted transactions less attractive to us. In addition, assets purchased from the FDIC are marked to their fair value and in many cases there is little or no addition to goodwill arising from an FDIC-assisted transaction. The number of FDIC failed bank resolutions has decreased significantly over previous years, and consequently, the bidding process for failing banks has become more competitive. The increased competition for such banks has made it more difficult for us to bid on terms we consider acceptable.

The success of bank acquisitions (which include FDIC-assisted transactions) will depend on a number of uncertain factors.

The success of our other bank acquisitions depends on a number of factors, including, without limitation:

• our ability to integrate the businesses acquired into IBERIABANK’s current operations;

• our ability to limit the outflow of deposits held by our new customers in the acquired businesses and to successfully retain and manage interest-earning assets (i.e., loans) acquired;

• our ability to attract new deposits and to generate new interest-earning assets in the geographic areas previously served by the acquired businesses;

• our ability to effectively compete in new markets in which we did not previously have a presence;

• our success in deploying the cash acquired in these transactions into assets bearing sufficiently high yields without incurring unacceptable credit or interest rate risk;

• our ability to control the incremental non-interest expense from the acquired businesses in a manner that enables us to maintain a favorable overall efficiency ratio;

• our ability to retain and attract the appropriate personnel to staff and maintain the acquired businesses; and

• our ability to earn acceptable levels of interest and non-interest income, including fee income, from the acquired businesses.

In any acquisition involving a financial institution, particularly one involving the transfer of a large number of bank branches and/or customers, there may be business and service changes and disruptions that result in the loss of customers or cause customers to close their accounts and move their business to competing financial institutions. Integration of such acquired businesses is an operation of substantial size and expense, and may be impacted by general market and economic conditions or government actions affecting the financial industry generally. Integration efforts also are likely to divert our management’s attention and resources. No assurance can be given that we will be able to integrate these acquired businesses successfully, and the integration process could result in the loss of key employees, the disruption of ongoing business, or inconsistencies in standards, controls, procedures and policies that adversely affect our ability to maintain relationships with clients, customers, depositors and employees or to achieve the anticipated benefits of bank acquisitions. We may also encounter unexpected difficulties or costs during the integration that could adversely affect our earnings and financial condition, perhaps materially.

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Additionally, no assurance can be given that the operation of acquired businesses will not adversely affect our existing profitability, that we will be able to achieve results in the future similar to those achieved by our existing banking business, that we will be able to compete effectively in the market areas currently served by the acquired businesses , or that we will be able to manage any growth resulting from bank acquisitions effectively.

Our ability to grow acquired businesses following these transactions depends in part on our ability to retain certain key branch personnel we expect to hire and/or retain in connection with these transactions. We believe that the ties these employees have in the local banking markets previously served by their acquired businesses are vital to our ability to maintain our relationships with existing customers and to generate new business in these markets. Our failure to hire or retain these employees could adversely affect the success of these transactions and our future growth.

The modeled returns of bank acquisitions will depend on a number of uncertain factors, and actual results could differ materially from our expectations.

We undertake a process in performing due diligence on bank acquisition targets. While this process attempts to be comprehensive, factors can arise that were not discovered or anticipated by us in this exercise. Additionally, our modeled returns are based on a variety of assumptions to include synergies, cost savings, credit losses, growth, and the fair value of assets, liabilities and contracts acquired. To the extent such factors arise or actual results differ from our assumptions, our actual shareholder returns on any given bank acquisition could differ materially from our modeled expectations.

Our indemnification assets are highly dependent upon the resolution of covered assets within the coverage period (as outlined in the loss share agreements with the FDIC) and could become impaired if events outside of our control prohibit us from collecting from the FDIC.

Our loss share agreements represented $70 million on our consolidated balance sheet as of December 31, 2014. Of this amount, $20 million is collectible from the FDIC, and $1 million is collectible from transactions on other real estate owned. For certain covered assets, loss share coverage expired as of January 1, 2015. To the extent that loss share coverage ends prior to triggering events on covered assets that would enable the Company to collect these amounts from the FDIC or OREO transactions, future impairments would be required.

The Company is subject to the interpretations of the loss share agreement by the FDIC to include the timing and amount of loss that may be claimed on a particular covered asset. To the extent the FDIC develops new or different interpretations of the loss share agreements, our indemnification assets could become impaired or the Company may be required to remit claims previously received back to the FDIC.

Failure to comply with the terms and conditions of our loss share agreements with the FDIC may result in significant losses.

Our failure to comply with the terms and conditions of our loss share agreements or to service properly the loans and OREO under the requirements of the loss share agreements may cause undervalued loans or pools of loans to lose eligibility for loss share payments from the FDIC. This could result in material losses that are not currently anticipated.

We are subject to the interpretations of the loss share agreement by the FDIC to include the timing and amount of loss that may be claimed on a particular covered asset. To the extent the FDIC develops new or different interpretations of the terms and conditions loss share agreements, our indemnification assets could become impaired or we could be required to remit payments for claims previously received back to the FDIC.

Changes in national and local economic conditions could lead to changes in the expectations of the amount and timing of losses and higher loan charge-offs in connection with bank acquisition transactions. Some or all of such losses and charge-offs in FDIC-assisted transactions may not be supported by the related loss sharing agreements with the FDIC.

We have acquired significant loan portfolios through bank acquisitions and FDIC-assisted transactions. Although these loan portfolios were initially accounted for at fair value, there is no assurance that the loans we acquired will not become impaired in the future, which may result in additional charge-offs. The fluctuations in national, regional and local economic conditions, including those related to local residential, commercial real estate

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and construction markets, may increase the level of charge-offs that we make to our loan portfolio, and, consequently, reduce our net income, and may also increase the level of charge-offs on our loan portfolio that we have acquired in our acquisitions and correspondingly reduce our net income. These fluctuations are not predictable, cannot be controlled and may have a material adverse impact on our operations and financial condition even if other favorable events occur.

Although in our FDIC-assisted transactions we have entered into loss sharing agreements with the FDIC which provide that a significant portion of losses related to specified loan portfolios that we have acquired in connection with the FDIC-assisted transactions will be borne by the FDIC, we are not fully protected for all losses resulting from charge-offs with respect to those specified loan portfolios. The loss sharing agreements have limited terms; therefore, any charge-off of related losses we experience after the term of the loss sharing agreements will not be reimbursed by the FDIC and will negatively impact our net income. Additionally, the terms of the agreements require us to remit to the FDIC recoveries on prior loss claims which could impact our net income. The loss sharing agreements also impose standard requirements on us which must be satisfied in order to retain loss share protections.

Deposit and loan run-off rates could exceed the rates we have projected in connection with our planning for the FDIC-assisted transactions and other bank acquisitions and the integration of the acquired branches.

Deposit run-off could be higher than our assumptions. As part of acquisition transactions, it is necessary for us to convert customer loan and deposit data from the failed banks’ data processing systems to our data processing system. Delays or errors in the conversion process could adversely affect customer relationships, increase run-off of deposit and loan customers and result in unexpected charges and costs. Similarly, run-off could increase if we are not able to service in a cost-effective manner particular loan or deposit products with special features previously offered by the failed or target banks. Any increase in run-off rates could adversely affect our ability to stimulate growth in such acquired branches, our liquidity, and our results of operations.

Risks About Our Common Stock

We cannot guarantee that we will pay dividends to shareholders in the future.

Cash available to pay dividends to our shareholders is derived primarily, if not entirely, from dividends paid to us from IBERIABANK. The ability of IBERIABANK to pay dividends to us, as well as our ability to pay dividends to its shareholders, are limited by regulatory and legal restrictions and the need to maintain sufficient consolidated capital. We may also decide to limit the payment of dividends even when we have the legal ability to pay them in order to retain earnings for use in our business. Further, any lenders making loans to us may impose financial covenants that may be more restrictive than regulatory requirements with respect to the payment of dividends. For instance, we are prohibited from paying dividends on our common stock if the required payments on our subordinated debentures have not been made. There can be no assurance of whether or when we may pay dividends in the future.

The trading history of our common stock is characterized by modest trading volume.

Our common stock trades on NASDAQ Global Select Market. During 2014, the average daily trading volume of our common stock was approximately 171,800 shares. We cannot predict the extent to which investor interest in us will lead to a more active trading market in our common stock or how much more liquid that market might become. A public trading market having the desired characteristics of depth, liquidity and orderliness depends upon the presence in the marketplace of willing buyers and sellers of our common stock at any given time, which presence is dependent upon the individual decisions of investors, over which we have no control.

The value of your investment may be subject to sudden decreases due to the volatility of the price of our common stock.

The market price of our common stock may be highly volatile and subject to wide fluctuations in response to numerous factors, including, but not limited to, the factors discussed in other risk factors and the following:

• actual or anticipated fluctuations in operating results;

• changes in interest rates;

• changes in the legal or regulatory environment in which we operate;

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• press releases, announcements or publicity relating to us or our competitors or relating to trends in our industry;

• changes in expectations as to our future financial performance, including financial estimates or recommendations by securities analysts and investors;

• future sales of our common stock;

• changes in economic conditions in our marketplace, general conditions in the U.S. economy, financial markets or the banking industry; and

• other developments affecting our competitors or us.

These factors may adversely affect the trading price of our common stock, regardless of our actual operating performance, and could prevent our shareholders from selling common stock at or above the public offering price. In addition, the stock markets, from time to time, experience extreme price and volume fluctuations that may be unrelated or disproportionate to the operating performance of companies. These broad fluctuations may adversely affect the market price of our common stock, regardless of our trading performance.

In the past, shareholders often have brought securities class action litigation against a company following periods of volatility in the market price of their securities. We may be the target of similar litigation in the future, which could result in substantial costs and divert management’s attention and resources.

Sales of a significant number of shares of our common stock in the public markets, or the perception of such sales, could depress the market price of our common stock.

Sales of a substantial number of shares of our common stock in the public markets and the availability of those shares for sale could adversely affect the market price of our common stock. In addition, future issuances of equity securities, including pursuant to the exercise of outstanding stock options, could dilute the interests of our existing shareholders, and could cause the market price of our common stock to decline. We may issue such additional equity or convertible securities to raise additional capital. The issuance of any additional shares of common or preferred stock or convertible securities could be substantially dilutive to holders of our common stock. Moreover, to the extent that we issue restricted stock units, phantom shares, stock appreciation rights, options or warrants to purchase our common stock in the future and those stock appreciation rights, options or warrants are exercised or as the restricted stock units vest, our shareholders may experience further dilution. Holders of our shares of common stock have no preemptive rights that entitle holders to purchase their pro rata share of any offering of shares of any class or series and, therefore, such sales or offerings could result in increased dilution to our shareholders. We cannot predict the effect that future sales of our common stock would have on the market price of our common stock.

We may issue debt and equity securities or securities convertible into equity securities, any of which may be senior to our common stock as to distributions and in liquidation, which could negatively affect the value of our common stock.

In the future, we may attempt to increase our capital resources by entering into debt or debt-like financing that is unsecured or secured by all or up to all of our assets, or by issuing additional debt or equity securities, which could include issuances of secured or unsecured commercial paper, medium-term notes, senior notes, subordinated notes, preferred stock or securities convertible into or exchangeable for equity securities. In the event of our liquidation, our lenders and holders of our debt and preferred securities would receive a distribution of our available assets before distributions to the holders of our common stock. Because our decision to incur debt and issue securities in our future offerings will depend on market conditions and other factors beyond our control, we cannot predict or estimate the amount, timing or nature of our future offerings and debt financings. Further, market conditions could require us to accept less favorable terms for the issuance of our securities in the future.

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Our management has broad discretion over the use of proceeds from debt and/or equity offerings.

Our management has significant flexibility in applying the proceeds that we receive from equity offerings. Although we have indicated our intent to use the proceeds from recent offerings for general corporate purposes, including future acquisitions, our working capital needs, and our investments in our subsidiaries, our management retains significant discretion with respect to uses of proceeds. The proceeds of our offerings may be used in a manner that does not generate a favorable return for us. We may use the proceeds to fund future acquisitions of other businesses. In addition, if we use the funds to acquire other businesses, there can be no assurance that any business we acquire would be successfully integrated into our operations or otherwise perform as expected.

We may issue additional securities, which could dilute your ownership percentage.

In many situations, our board of directors has the authority, without any vote of our shareholders, to issue shares of our authorized but unissued stock, including shares authorized and unissued under our stock option plans. In the future, we may issue additional securities, through public or private offerings, to raise additional capital or finance acquisitions. Moreover, to the extent we issue restricted stock units, stock appreciation rights, options or warrants to purchase our common stock in the future and those stock appreciation rights, options or warrants are exercised or as the restricted stock units vest, our shareholders may experience further dilution. Any such issuance would dilute the ownership of current holders of our common stock.

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Item 1B. Unresolved Staff Comments.

None.

Item 2. Properties.

As of December 31, 2014, we operated 280 combined offices, including 188 bank branch offices and four loan production offices in Louisiana, Arkansas, Alabama, Florida, Texas, and Tennessee, 23 title insurance offices in Arkansas and Louisiana, mortgage representatives in 57 locations in 10 states, and eight wealth management locations in five states, and one IBERIA Capital Partners, L.L.C. office in Louisiana. Office locations are either owned or leased. For offices in premises leased by us or our subsidiaries, rent expense totaled $11 million in 2014. During 2014, we and our subsidiaries received $2 million in rental income for space leased to others. At December 31, 2014, there were no significant encumbrances on the offices, equipment and other operational facilities owned by us and our subsidiaries.

Additional information on our premises is provided in Note 10 to the Consolidated Financial Statements incorporated herein by reference.

Item 3. Legal Proceedings.

The nature of the business of IBKC’s banking and other subsidiaries ordinarily results in a certain amount of claims, litigation, investigations and legal and administrative cases and proceedings, all of which are considered incidental to the normal conduct of business. Some of these claims are against entities or assets of which IBKC is a successor or acquired in business acquisitions, and certain of these claims will be covered by loss sharing agreements with the FDIC. For additional information, see Note 8 to the Consolidated Financial Statements. IBKC believes it has meritorious defenses to the claims asserted against it in its currently outstanding legal proceedings and, with respect to such legal proceedings, intends to continue to defend itself vigorously, litigating or settling cases according to management’s judgment as to what is in the best interest of IBKC and its shareholders.

IBKC assesses its liabilities and contingencies in connection with outstanding legal proceedings utilizing the latest information available. Where it is probable that IBKC will incur a loss and the amount of the loss can be reasonably estimated, IBKC records a liability in its consolidated financial statements. These legal reserves may be increased or decreased to reflect any relevant developments on a quarterly basis. Where a loss is not probable or the amount of loss is not estimable, IBKC does not accrue legal reserves. While the outcome of legal proceedings is inherently uncertain, based on information currently available, advice of counsel and available insurance coverage, IBKC’s management believes that it has established adequate legal reserves. Any liabilities arising from pending legal proceedings are not expected to have a material adverse effect on IBKC’s consolidated financial position, consolidated results of operations or consolidated cash flows. However, in the event of unexpected future developments, it is possible that the ultimate resolution of these matters, if unfavorable, may be material to IBKC’s consolidated financial position, consolidated results of operations or consolidated cash flows.

Item 4. Mine Safety Disclosures

Not applicable.

Executive Officers of the Registrant

Set forth below is information with respect to the executive officers of IBERIABANK Corporation and principal occupations and positions held for periods including the last five years.

DARYL G. BYRD, age 60, has served as our President since 1999 and as Chief Executive Officer since 2000. He also serves as President and Chief Executive Officer of IBERIABANK.

ANTHONY J. RESTEL, age 45, has served as Senior Executive Vice President and Chief Financial Officer since 2005. Mr. Restel was hired as Vice President and Treasurer in 2001 and previously served as Chief Credit Officer of IBERIABANK.

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MICHAEL J. BROWN, age 51, has served as Senior Executive Vice President since 2001. In September 2009, Mr. Brown was appointed Vice-Chairman and Chief Operating Officer. Mr. Brown is responsible for management of all of our banking markets.

JEFFERSON G. PARKER, age 62, serves as our Vice-Chairman and Managing Director of Brokerage, Trust, and Wealth Management. He has served as our Vice-Chairman since September 2009. Before his employment with the Company, Mr. Parker was a member of our Board of Directors since 2001. Prior to joining IBERIABANK, he served as President of Howard Weil, Inc., an energy research and investment banking boutique serving institutional investors.

JOHN R. DAVIS, age 54, has served as Senior Executive Vice President – Mergers and Acquisitions and Investor Relations since 2001. He also serves as Director of Financial Strategy and Mortgage.

ELIZABETH A. ARDOIN, age 46, joined the Company in 2002 as Senior Vice President and Director of Communications. In 2005, she was promoted to Executive Vice President continuing to serve in the same capacity for the organization. She has been Senior Executive Vice President, Director of Communications, Facilities and Human Resources since February 2013. Ms. Ardoin also serves as a director of the New Orleans Branch of the Federal Reserve Bank of Atlanta.

J. RANDOLPH BRYAN, age 47, has served as Executive Vice President and Chief Risk Officer since July 2012. Mr. Bryan previously served as Director of Strategic Initiatives and M&A prior to becoming Chief Risk Officer. Prior to joining the Company, Mr. Bryan served as Chief Operating Officer for First Southern Bancorp in Boca Raton, Florida. Prior to his experience at First Southern Bancorp, the majority of Mr. Bryan’s banking career was spent at Capital One/Hibernia National Bank, where he held a number of different leadership roles over a 13-year period, including responsibility for Capital One’s Banking Sales Arena, which included marketing and delivery channel management, national direct banking, customer experience, corporate communications, and public relations.

ROBERT M. KOTTLER, age 56, has served as Executive Vice President and Director of Retail and Small Business since his appointment in 2011. Prior to joining the Company, Mr. Kottler previously worked for Capital One Bank as Executive Vice President for Small Business Banking, and prior to its merger with Capital One Financial Corporation in 2005, served Hibernia Corporation as its Senior Executive Vice President and Chief Sales Support Officer.

H. SPURGEON MACKIE, JR., age 64, has served as Executive Vice President and Chief Credit Officer since 2013. Mr. Mackie previously served as Executive Credit Officer since his appointment in 2011. Prior to joining the Company, Mr. Mackie, Jr. previously served as Executive Director of the Community Foundation of Gaston County, Inc. Prior to that role, he worked for First Union/Wachovia in numerous capacities for 32 years, including Area President, Chief Credit Officer for Interstate Banking, and Chief Risk Officer for the General Bank, among others.

ROBERT B. WORLEY, JR., age 55, has served as Executive Vice President, General Counsel and Corporate Counsel since his appointment in 2011. Before joining the Company, Mr. Worley practiced law in New Orleans with the Jones Walker law firm, where he was a partner, and had served as the Chairman of the firm’s Professional Employment Committee, was a partner in the firm and also served on the firm’s Board of Directors. Before that, Mr. Worley was a shareholder (partner) in the Kullman firm, a law firm in New Orleans. He has practiced law for 28 years.

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PART II.

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

Stock Performance Graph

The following graph and table, which were prepared by SNL Financial LC (“SNL”), compares the cumulative total return on our Common Stock over a measurement period beginning December 31, 2009 with (i) the cumulative total return on the stocks included in the National Association of Securities Dealers, Inc. Automated Quotation (“NASDAQ”) Composite Index and (ii) the cumulative total return on the stocks included in the SNL > $10 Billion Bank Index. All of these cumulative returns are computed assuming the quarterly reinvestment of dividends paid during the applicable period.

	Period Ending
Index	12/31/09		12/31/10		12/31/11		12/31/12		12/31/13		12/31/14
IBERIABANK Corporation		100.00		112.65		96.39		98.70		129.48		136.34
NASDAQ Composite		100.00		118.15		117.22		138.02		193.47		222.16
SNL Bank > $10B		100.00		112.14		85.36		116.28		158.68		178.40

The stock performance graph assumes $100.00 was invested December 31, 2009. The stock price performance included in this graph is not necessarily indicative of future stock price performance.

Additional information required herein is incorporated by reference to “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and “Corporate Information Data” in Exhibit 13 hereto.

Share Repurchases

Share repurchases may be made from time to time, on the open market or in privately negotiated transactions, at the discretion of the management of the Company, after the Board of Directors authorizes a

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repurchase program. The approved share repurchase program does not obligate the Company to repurchase any dollar amount or number of shares, and the program may be extended, modified, suspended, or discontinued at any time. Stock repurchases generally are affected through open market purchases, and may be made through unsolicited negotiated transactions. The timing of these repurchases will depend on market conditions and other requirements.

In August of 2011, the Board of Directors authorized the repurchase of up to 900,000 shares of common stock, and in October authorized the repurchase of an additional 900,000 shares of common stock.

There were no stock repurchases in 2014. 46,692 shares remain available for purchase pursuant to publically announced plans.

Restrictions on Dividends

Holders of the Company’s common stock are only entitled to receive such dividends as the Board of Directors may declare out of funds legally available for such payments. Furthermore, holders of the common stock are subject to priority dividend rights of any holders of preferred stock then outstanding. At December 31, 2014, no shares of preferred stock were issued and outstanding.

In addition, the terms of the Company’s outstanding junior subordinated debt securities prohibit it from declaring or paying any dividends or distributions on outstanding capital stock, or purchasing, acquiring, or making a liquidation payment on such stock, if the Company has elected to defer interest payments on such debt.

For additional information, see Notes 16 and 25 of the Notes to the Consolidated Financial Statements.

Item 6. Selected Financial Data.

The information required herein is incorporated by reference to “Selected Consolidated Financial and Other Data” in Exhibit 13 hereto.

Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

The information required herein is incorporated by reference to “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in Exhibit 13 hereto.

Item 7A. Quantitative and Qualitative Disclosures about Market Risk.

The information required herein is incorporated by reference to “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in Exhibit 13 hereto.

Item 8. Financial Statements and Supplementary Data.

The information required herein is incorporated by reference to “IBERIABANK Corporation and Subsidiaries Consolidated Financial Statements” in Exhibit 13 hereto.

38

Item 9. Changes in and Disagreements With Accountants on Accounting and Financial Disclosure.

None.

Item 9A. Controls and Procedures.

Evaluation of Disclosure Controls and Procedures

As required by Rule 13a-15 under the Securities Exchange Act of 1934 (the “Exchange Act”), we performed an evaluation of the effectiveness of our disclosure controls and procedures as of December 31, 2014. The evaluation was carried out under the supervision, and with the participation of, the Chief Executive Officer (“CEO”) and Chief Financial Officer (“CFO”). Based on that evaluation, the CEO and CFO have concluded that our disclosure controls and procedures were effective as of the end of the period covered by this Report. Management’s Annual Report on Internal Control over Financial Reporting, and the attestation report of the independent registered public accounting firm, are included in Exhibit 13 and are incorporated by reference herein.

Changes in Internal Control over Financial Reporting

Except for the remediation of the material weakness discussed below, there were no significant changes in our internal control over financial reporting during the fourth quarter of 2014 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Material Weakness Related to Mortgage Income

We identified a material weakness in our internal control over financial reporting related to the accounting for our mortgage banking operations. This material weakness resulted from the operational ineffectiveness of reconciliation and review controls specifically associated with our accounting for the fair value of mortgage loans held for sale and related forward sales contracts.

This material weakness resulted in erroneous accounting entries recorded in the second and third quarters of 2014. These errors overstated non-interest income in the consolidated statement of comprehensive income by $4.2 million in the second quarter of 2014 and understated non-interest income by $1.5 million in the third quarter of 2014. In this Form 10-K, we have revised our unaudited quarterly financial data for the quarterly periods ended June 30, 2014 and September 30, 2014. For further information see Note 28 – Quarterly Results of Operations and Selected Cash Flow Data (Unaudited) to the consolidated financial statements. These adjustments had no impact on the financial results in the fourth quarter of 2014 or the full year 2014.

In connection with this material weakness, we re-evaluated our disclosure controls and procedures as of June 30, 2014 and September 30, 2014. Based on this reevaluation, and solely as a result of this material weakness, the Company’s CEO and CFO have concluded that the disclosure controls and procedures were not effective as of June 30, 2014 or September 30, 2014.

Remediation of Material Weakness in Internal Control

A number of remedial actions were taken to address the material weakness, which included:

• An assessment of the competency of those responsible for performing the control procedures;

• Increasing the level of precision in the controls currently in place; and

• Implementing additional mitigating and compensating controls to reduce the risk that an error could occur in the future.

We have completed the process of implementing the aforementioned enhancements and believe that we have fully remediated the material weakness in our internal control over financial reporting with respect to the appropriate accounting for the fair value of mortgage loans held for sale and forward sales contracts as of December 31, 2014.

39

Management Report on Internal Control over Financial Reporting

The management of IBERIABANK Corporation (the “Company”) is responsible for establishing and maintaining effective internal control over financial reporting. The Company’s internal control system was designed to provide reasonable assurance to the Company’s management and Board of Directors regarding the preparation and fair presentation of the Company’s financial statements for external purposes in accordance with U.S. generally accepted accounting principles. Internal control over financial reporting includes self-monitoring mechanisms, and actions are taken to correct deficiencies as they are identified.

All internal control systems, no matter how well designed, have inherent limitations and may not prevent or detect misstatements in the Company’s financial statements, including the possibility of circumvention or overriding of controls. Therefore, even those systems determined to be effective can provide only reasonable assurance with respect to financial statement preparation and presentation. Projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of a change in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

The Company’s management assessed the effectiveness of the Company’s internal control over financial reporting as of December 31, 2014. In making this assessment, it used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in Internal Control—Integrated Framework (2013 Framework). Based on its assessment, management believes that, as of December 31, 2014, the Company’s internal control over financial reporting is effective based on those criteria.

The effectiveness of our internal control over financial reporting as of December 31, 2014 was audited by Ernst & Young LLP, an independent registered public accounting firm, as stated in their report appearing in Exhibit 13 to this Form 10-K.

Item 9B. Other Information.

None.

40

PART III.

Item 10. Directors, Executive Officers and Corporate Governance.

Information concerning the Registrant’s executive officers is contained in Part I of this Form 10-K. Other information required herein, including information on directors, the audit committee, and the audit committee financial expert is incorporated by reference to the Proxy Statement.

Item 11. Executive Compensation.

The information required herein is incorporated by reference to the Proxy Statement.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.

The information required herein is incorporated by reference to the Proxy Statement.

Item 13. Certain Relationships and Related Transactions, and Director Independence.

The information required herein is incorporated by reference to the Proxy Statement.

Item 14. Principal Accounting Fees and Services.

The information required herein is incorporated by reference to the Proxy Statement.

41

PART IV.

Item 15. Exhibits and Financial Statement Schedules.

(a) Documents Filed as Part of this Report.

(1) The following financial statements are incorporated by reference from Item 8 hereof (see Exhibit No. 13):

Consolidated Balance Sheets as of December 31, 2014 and 2013

Consolidated Statements of Comprehensive Income for the Years Ended December 31, 2014, 2013, and 2012

Consolidated Statements of Shareholders’ Equity for the Years Ended December 31, 2014, 2013, and 2012

Consolidated Statements of Cash Flows for the Years Ended December 31, 2014, 2013, and 2012

Notes to Consolidated Financial Statements

(2) All schedules for which provision is made in the applicable accounting regulation of the SEC are omitted because of the absence of conditions under which they are required or because the required information is included in the consolidated financial statements and related notes thereto.

(3) The following exhibits are filed as part of this Form 10-K, and this list includes the Exhibit Index.

Exhibit Index

Exhibit No. 2.1	Agreement and Plan of Merger, dated as of October 2, 2014, by and between the Registrant and Florida Bank Group, Inc. – incorporated herein by reference to Exhibit 2.1 to the Registrant’s Current Report on Form 8-K, dated October 2, 2014.
Exhibit No 2.2	Agreement and Plan of Merger, dated as of October 26, 2014, by and between the Registrant and Old Florida Bancshares, Inc. – incorporated herein by reference to Exhibit 2.1 to the Registrant’s Current Report on Form 8-K, dated October 26, 2014.
Exhibit No. 2.3	Agreement and Plan of Merger, dated as of December 7, 2014 by and between the Registrant and Georgia Commerce Bancshares, Inc. – incorporated herein by reference to Exhibit 2.1 to the Registrant’s Current Report on Form 8-K, dated December 7, 2014.
Exhibit No. 2.4	Agreement and Plan of Merger, dated as of February 10, 2014, by and between the Registrant and First Private Holdings, Inc. – incorporated herein by reference to Exhibit 2.1 to the Registrant’s Current Report on Form 8-K, dated February 10, 2014.
Exhibit No. 2.5	Agreement and Plan of Merger, dated as of January 12, 2014, between the Registrant and Teche Holding Company – incorporated herein by reference to Exhibit 2.1 to the Registrant’s Current Report on Form 8-K, dated January 12, 2014.
Exhibit No. 2.6	Purchase and Assumption Agreement dated as of August 21, 2009, by and among the Federal Deposit Insurance Corporation, Receiver of CapitalSouth Bank, IBERIABANK, and the Federal Deposit Insurance Corporation – incorporated herein by reference to Exhibit 2.1 to the Registrant’s Current Report on Form 8-K dated August 21, 2009.
Exhibit No. 2.7	Purchase and Assumption Agreement dated as of November 13, 2009, by and among the Federal Deposit Insurance Corporation, Receiver of Orion Bank, IBERIABANK, and the Federal Deposit Insurance Corporation – incorporated herein by reference to Exhibit 2.1 to the Registrant’s Current Report on Form 8-K dated November 13, 2009.
Exhibit No. 2.8	Purchase and Assumption Agreement dated as of November 13, 2009, by and among the Federal Deposit Insurance Corporation, Receiver of Century Bank, A Federal Savings Bank, IBERIABANK, and the Federal Deposit Insurance Corporation – incorporated herein by reference to Exhibit 2.2 to the Registrant’s Current Report on Form 8-K dated November 13, 2009.
Exhibit No. 3.1	Articles of Incorporation, as amended – incorporated herein by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K filed on February 2, 2015.
Exhibit No. 3.2	Bylaws of the Company, as amended – incorporated herein by reference to Exhibit 3.1 to Registrant’s Current Report on Form 8-K dated March 25, 2013.
Exhibit No. 4.1	Stock Certificate – incorporated herein by reference to Registration Statement on Form S-8 (File No. 33-93210).

42

Exhibit No. 4.2	Junior Subordinated Indenture between the Registrant and Wilmington Trust Company, dated September 20, 2004 – incorporated herein by reference to Exhibit 4 to Registrant’s Current Report on Form 8-K dated September 20, 2004.
Exhibit No. 4.3	Junior Subordinated Indenture between the Registrant and Wilmington Trust Company, dated October 31, 2006 – incorporated herein by reference to Exhibit 4.1 to the Registrant’s Current Report on Form 8-K dated October 31, 2006.
Exhibit No. 4.4	Junior Subordinated Indenture between the Registrant and Wilmington Trust Company, dated June 21, 2007 – incorporated herein by reference to Exhibit 4.1 to the Registrant’s Current Report on Form 8-K dated June 21, 2007.
Exhibit No. 4.5	Junior Subordinated Indenture between the Registrant and U.S. Bank National Association, dated November 9, 2007 – incorporated herein by reference to Exhibit 4.1 to the Registrant’s Current Report on Form 8-K dated November 9, 2007.
Exhibit No. 4.6	Junior Subordinated Indenture between the Registrant and U.S. Bank National Association, dated November 9, 2007 – incorporated herein by reference to Exhibit 4.2 to the Registrant’s Current Report on Form 8-K dated November 9, 2007.
Exhibit No. 4.7	Subordinated Capital Note, Series 2008-1, dated as of July 21, 2008, between IBERIABANK and SunTrust Bank- incorporated herein by reference to Exhibit 4.1 to the Registrant’s Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2008.
Exhibit No. 4.8	Indenture, dated as of March 28, 2008, between IBERIABANK Corporation and Wells Fargo Bank, National Association, as trustee, with respect to IBERIABANK Statutory Trust VIII – incorporated herein by reference to Exhibit 4.1 to the Registrant’s Current Report on Form 8-K dated March 28, 2008.
Exhibit No. 10.1	Retirement Savings Plan – incorporated herein by reference to Exhibit 10.1 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2005.
Exhibit No. 10.2	Employment Agreement with Daryl G. Byrd, as amended and restated – incorporated herein by reference to Exhibit 10.4 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2001.
Exhibit No. 10.3	Indemnification Agreements with Daryl G. Byrd and Michael J. Brown – incorporated herein by reference to Exhibit 10.5 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 1999.
Exhibit No. 10.4	Severance Agreements with Michael J. Brown and John R. Davis – incorporated herein by reference to Exhibit 10.6 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2000.
Exhibit No. 10.5	Severance Agreement with George J. Becker, III – incorporated herein by reference to Exhibit 10.7 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2000.
Exhibit No. 10.6	Severance Agreement with Anthony J. Restel – incorporated herein by reference to Exhibit 10.1 to the Registrant’s Quarterly Report on Form 10-Q for the fiscal quarter ended March 31, 2005.
Exhibit No. 10.7	1996 Stock Option Plan – incorporated herein by reference to Exhibit 10.1 to Registration Statement on Form S-8 (File No. 333-28859).
Exhibit No. 10.8	1999 Stock Option Plan – incorporated herein by reference to the Registrant’s definitive proxy statement dated March 19, 1999.
Exhibit No. 10.9	Recognition and Retention Plan – incorporated herein by reference to the Registrant’s definitive proxy statement dated April 16, 1996.
Exhibit No. 10.10	Supplemental Stock Option Plan – incorporated herein by reference to Exhibit 10.10 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 1999.
Exhibit No. 10.11	2001 Incentive Compensation Plan, as amended – incorporated herein by reference to the Registrant’s definitive proxy statement dated April 2, 2003.
Exhibit No. 10.12	2005 Stock Incentive Plan, as amended – incorporated herein by reference to Exhibit 10.1 to the Registrant’s Quarterly Report on Form 10-Q for the fiscal quarter ended March 31, 2009.
Exhibit No. 10.13	Purchase Agreement, dated as of June 17, 2003, among IBERIABANK Corporation, IBERIABANK Statutory Trust II and Trapeza CDO III, LLC – incorporated herein by reference to Exhibit 10.1 to the Registrant’s Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2003.
Exhibit No. 10.14	Placement Agreement among the Registrant, IBERIABANK Statutory Trust III and SunTrust Capital Markets, Inc., dated as of September 20, 2004 – incorporated herein by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K dated September 20, 2004.
Exhibit No. 10.15	Guarantee Agreement between the Registrant and Wilmington Trust Company, dated as of September 20, 2004 – incorporated herein by reference to Exhibit 10.7 to the Registrant’s Current Report on Form 8-K dated September 20, 2004.

43

Exhibit No. 10.16	Form of Restricted Stock Award Agreement under the ISB Supplemental Stock Option Plan – incorporated herein by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K dated August 15, 2005.
Exhibit No. 10.17	Form of Acknowledgement regarding acceleration of unvested stock options granted by the Registrant – incorporated herein by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K dated December 30, 2005.
Exhibit No. 10.18	Form of Restricted Stock Agreement under the IBERIABANK Corporation 2001 Incentive Compensation Plan – incorporated herein by reference to Exhibit 10.18 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2005.
Exhibit No. 10.19	Form of Incentive Stock Option Agreement under the IBERIABANK Corporation 2001 Incentive Compensation Plan – incorporated herein by reference to Exhibit 10.19 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2005.
Exhibit No. 10.20	Form of Restricted Stock Agreement under the IBERIABANK Corporation 2005 Stock Incentive Plan – incorporated herein by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K dated May 17, 2006.
Exhibit No. 10.21	Form of Stock Option Agreement under the IBERIABANK Corporation 2005 Stock Incentive Plan – incorporated herein by reference to Exhibit 10.2 to the Registrant’s Current Report on Form 8-K dated May 17, 2006.
Exhibit No. 10.22	Amended and Restated Trust Agreement, dated as of October 31, 2006, among the Registrant, as depositor, Wilmington Trust Company, as Delaware trustee, Wilmington Trust Company, as property trustee, and the administrators named therein – incorporated herein by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K dated October 31, 2006.
Exhibit No. 10.23	Guarantee Agreement, dated as of October 31, 2006, between the Registrant and Wilmington Trust Company – incorporated herein by reference to Exhibit 10.2 to the Registrant’s Current Report on Form 8-K dated October 31, 2006.
Exhibit No. 10.24	Amended and Restated Trust Agreement, dated as of June 21, 2007, among the Registrant, as sponsor, Wilmington Trust Company, as Delaware trustee, Wilmington Trust Company, as institutional trustee, and the administrators named therein – incorporated herein by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K dated June 21, 2007.
Exhibit No. 10.25	Guarantee Agreement, dated as of June 21, 2007, between the Registrant and Wilmington Trust Company – incorporated herein by reference to Exhibit 10.2 to the Registrant’s Current Report on Form 8-K dated June 21, 2007.
Exhibit No. 10.26	Amended and Restated Trust Agreement, dated as of November 9, 2007, among the Registrant, as sponsor, U.S. Bank National Association, as institutional trustee and the administrators named therein – incorporated herein by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K dated November 9, 2007.
Exhibit No. 10.27	Guarantee Agreement, dated as of November 9, 2007, between the Registrant and U.S. Bank National Association – incorporated herein by reference to Exhibit 10.2 to the Registrant’s Current Report on Form 8-K dated November 9, 2007.
Exhibit No. 10.28	Amended and Restated Trust Agreement, dated as of November 9, 2007, among the Registrant, as sponsor, U.S. Bank National Association, as institutional trustee and the administrators named therein – incorporated herein by reference to Exhibit 10.3 to the Registrant’s Current Report on Form 8-K dated November 9, 2007.
Exhibit No. 10.29	Guarantee Agreement, dated as of November 9, 2007, between the Registrant and U.S. Bank National Association – incorporated herein by reference to Exhibit 10.4 to the Registrant’s Current Report on Form 8-K dated November 9, 2007.
Exhibit No. 10.30	IBERIABANK Corporation Deferred Compensation Plan – incorporated herein by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K dated December 17, 2007.
Exhibit No. 10.31	Form of Phantom Stock Award Agreement – incorporated herein by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K dated November 17, 2008.
Exhibit No. 10.32	Form of Restricted Stock Agreement under the IBERIABANK Corporation 2008 Stock Incentive Plan – incorporated herein by reference to Exhibit 10.1 to the Registrant’s Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2008.
Exhibit No 10.33	Form of Stock Option Agreement under the IBERIABANK Corporation 2008 Stock Incentive Plan – incorporated herein by reference to Exhibit 10.2 to the Registrant’s Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2008.
Exhibit No. 10.34	Subordinated Capital Note Purchase/ Loan Agreement dated as of July 21, 2008, by and between IBERIABANK and SunTrust Bank – incorporated herein by reference to Exhibit 10.3 to the Registrant’s Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2008.

44

Exhibit No. 10.35	IBERIABANK Corporation 2008 Stock Incentive Plan – incorporated herein by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K dated April 29, 2008.
Exhibit No. 10.36	Amended and Restated Declaration of Trust, dated as of March 28, 2008, among IBERIABANK Corporation, as sponsor, Wells Fargo Bank, National Association, as institutional trustee, and the administrators named therein, with respect to IBERIABANK Statutory Trust VIII – incorporated herein by reference to the Registrant’s Current Report on Form 8-K dated March 28, 2008.
Exhibit No. 10.42	Guarantee Agreement, dated as of March 28, 2008, between IBERIABANK Corporation, as guarantor, and Wells Fargo Bank, National Association, as trustee, with respect to IBERIABANK Statutory Trust VIII – incorporated herein by reference to the Registrant’s Current Report on Form 8-K dated March 28, 2008.
Exhibit No. 10.37	Change in Control Severance Agreement with James B. Gburek dated September 21, 2009 – incorporated herein by reference to Exhibit 10.5 to the Registrant’s Quarterly Report on Form 10-Q for the fiscal quarter ended September 30, 2009.
Exhibit No. 10.38	IBERIABANK Corporation 2009 Phantom Stock Plan – incorporated herein by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K dated September 29, 2009.
Exhibit No. 10.39	Form of IBERIABANK Corporation Phantom Stock Unit Agreement – incorporated herein by reference to Exhibit 10.2 to the Registrant’s Current Report on Form 8-K dated September 29, 2009.
Exhibit No. 10.40	Form of Termination of Letter Agreement, executed by each of Messrs. Daryl G. Byrd, Anthony J. Restel, Michael J. Brown, and John R. Davis, dated March 31, 2009 – incorporated herein by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K dated March 31, 2009, as amended.
Exhibit No. 10.41	Employment Letter with Jefferson G. Parker dated September 17, 2009 – incorporated herein by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K dated September 17, 2009.
Exhibit No. 10.42	Change in Control Severance Agreement with Jefferson G. Parker dated September 17, 2009 – incorporated herein by reference to Exhibit 10.2 to the Registrant’s Current Report on Form 8-K dated September 17, 2009.
Exhibit No. 10.43	2010 Stock Incentive Plan, as amended – incorporated herein by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K dated January 18, 2010.
Exhibit No. 10.44	Form of Restricted Stock Agreement under the IBERIABANK Corporation 2010 Stock Incentive Plan – incorporated herein by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K dated May 4, 2010.
Exhibit No. 10.45	Form of Stock Option Agreement under the IBERIABANK Corporation 2010 Stock Incentive Plan – incorporated herein by reference to Exhibit 10.2 to the Registrant’s Current Report on Form 8-K dated May 4, 2010.
Exhibit No. 10.46	IBERIABANK Corporation Amended and Restated 2010 Stock Incentive Plan – incorporated herein by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K dated May 6, 2011.
Exhibit No. 10.47	Form of IBERIABANK Corporation Restricted Stock Agreement under the IBERIABANK Corporation 2010 Stock Incentive Plan – incorporated herein by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K dated May 6, 2013.
Exhibit No. 10.48	Change in Control Severance Agreement with Michael S. Price dated June 18, 2012 – incorporated herein by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K dated June 18, 2012.
Exhibit No. 10.49	IBERIABANK Corporation 2014 Phantom Stock Plan – incorporated herein by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K dated February 17, 2014.
Exhibit No. 10.50	Form of IBERIABANK Corporation Phantom Stock Unit Agreement – incorporated herein by reference to Exhibit 10.2 to the Registrant’s Current Report on Form 8-K dated February 17, 2014.
Exhibit No. 10.51	Form of IBERIABANK Corporation Performance Unit Agreement – incorporated herein by reference to Exhibit 10.51 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2013.
Exhibit No. 10.52	Form of IBERIABANK Corporation Restricted Share Unit Agreement (Performance Contingent Award) – incorporated herein by reference to Exhibit 10.52 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2013.
Exhibit No. 10.53	Form of IBERIABANK Corporation Restricted Stock Agreement – incorporated herein by reference to Exhibit 10.53 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2013.
Exhibit No. 10.54	Form of IBERIABANK Corporation Stock Option Agreement – incorporated herein by reference to Exhibit 10.54 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2013.
Exhibit No. 10.55	Form of Change in Control Severance Agreement – incorporated herein by reference to Exhibit 10.1 to the Registrant’s Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2010.
Exhibit No. 12	Statements: Computations of Ratios.
Exhibit No. 13	Annual Report to Shareholders – Portions of Annual Report to Shareholders for the year ended December 31, 2014, which are expressly incorporated herein by reference.

45

Exhibit No. 21	Subsidiaries of the Registrant.
Exhibit No. 23.1	Consent of Ernst & Young LLP
Exhibit No. 31.1	Certification of principal executive officer pursuant to Exchange Act Rule 13a-14(a) or 15d-14(a).
Exhibit No. 31.2	Certification of principal financial officer pursuant to Exchange Act Rule 13a-14(a) or 15d-14(a).
Exhibit No. 32.1	Certification of principal executive officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
Exhibit No. 32.2	Certification of principal financial officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
Exhibit No. 99.1	Purchase and Assumption Agreement dated as of July 23, 2010, by and among the Federal Deposit Insurance Corporation, Receiver of Sterling Bank, Lantana, Florida, IBERIABANK, and the Federal Deposit Insurance Corporation – incorporated herein by reference to Exhibit 99.2 to the Registrant’s Current Report on Form 8-K/A dated August 2, 2010.
Exhibit No. 99.2	Corporate Governance Guidelines, as amended – incorporated herein by reference to Exhibit 99.1 to the Registrant’s Current Report on Form 8-K dated January 27, 2012.
Exhibit No. 101.INS	XBRL Instance Document.
Exhibit No. 101.SCH	XBRL Taxonomy Extension Schema.
Exhibit No. 101.CAL	XBRL Taxonomy Extension Calculation Linkbase.
Exhibit No. 101.DEF	XBRL Taxonomy Extension Definition Linkbase.
Exhibit No. 101.LAB	XBRL Taxonomy Extension Label Linkbase.
Exhibit No. 101.PRE	XBRL Taxonomy Extension Presentation Linkbase.

46

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	IBERIABANK CORPORATION
Date: March 2, 2015	By:	/s/ Daryl G. Byrd
		President/CEO and Director

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated.

Name	Title	Date
/s/ Daryl G. Byrd	President, Chief Executive Officer and Director	March 2, 2015
Daryl G. Byrd
/s/ John R. Davis	Senior Executive Vice President-Mergers and Acquisitions and Investor Relations, Director of Financial Strategy and Mortgage	March 2, 2015
John R. Davis
/s/ Anthony J. Restel	Senior Executive Vice President and Chief Financial Officer	March 2, 2015
Anthony J. Restel
/s/ M. Scott Price	Senior Vice President, Corporate Controller and Chief Accounting Officer	March 2, 2015
M. Scott Price
/s/ Elaine D. Abell	Director	March 2, 2015
Elaine D. Abell
/s/ Harry V. Barton, Jr.	Director and Audit Committee Chairman	March 2, 2015
Harry V. Barton, Jr.
/s/ Ernest P. Breaux, Jr.	Director	March 2, 2015
Ernest P. Breaux, Jr.
/s/ John N. Casbon	Director	March 2, 2015
John N. Casbon
/s/ Angus R. Cooper, II	Director	March 2, 2015
Angus R. Cooper, II
/s/ William H. Fenstermaker	Chairman of the Board	March 2, 2015
William H. Fenstermaker
/s/ John E. Koerner, III	Director and Audit Committee Member	March 2, 2015
John E. Koerner, III
/s/ O. Miles Pollard, Jr.	Director and Audit Committee Member	March 2, 2015
O. Miles Pollard, Jr.
/s/ E. Stewart Shea III	Director	March 2, 2015
E. Stewart Shea III
/s/ David H. Welch	Director	March 2, 2015
David H. Welch

47

EX-12

EXHIBIT 12

STATEMENTS: COMPUTATION OF RATIOS

The following is a computation of Non-GAAP financial ratios:

	Years Ended December 31,
(dollars in thousands)	2014			2013			2012			2011			2010
Net Interest Income	$	460,111		$	390,244		$	381,750		$	338,258		$	281,627
Effect of Tax Benefit on Interest Income		8,609			9,452			9,659			8,178			7,778
Net Interest Income (TE) (1)		468,720			399,696			391,409			346,436			289,405
Non-interest Income		173,628			168,958			175,997			131,859			133,890
Effect of Tax Benefit on Noninterest Income		2,947			1,964			1,981			1,775			1,669
Non-interest Income (TE) (1)		176,575			170,922			177,978			133,634			135,559
Total Revenues (TE) (1)	$	645,295		$	570,618		$	569,387		$	480,070		$	424,964
Total Non-interest Expense	$	474,479		$	473,085		$	432,185		$	373,731		$	304,249
Less Intangible Amortization Expense		(5,807	)		(4,720	)		(5,150	)		(5,121	)		(4,935	)
Tangible Operating Expense (2)	$	468,672		$	468,365		$	427,035		$	368,610		$	299,314
Net income	$	105,450		$	65,103		$	76,395		$	53,538		$	48,826
Effect of Intangible Amortization, net of tax		3,775			3,068			3,348			3,328			3,208
Cash earnings	$	109,225		$	68,171		$	79,743		$	56,866		$	52,034
Net Income per Common Share- Diluted	$	3.30		$	2.20		$	2.59		$	1.87		$	1.88
Effect of Intangible Amortizaton per diluted share, net of tax		0.12			0.10			0.11			0.11			0.13
Cash Earnings per Share- Diluted	$	3.42		$	2.30		$	2.70		$	1.98		$	2.01
Return on Average Common Equity		6.17	%		4.26	%		5.05	%		3.77	%		3.91	%
Effect of Intangibles (2)		2.88			1.94			2.16			1.53			1.36
Return on Average Tangible Common Equity (2)		9.05	%		6.20	%		7.21	%		5.30	%		5.27	%
Efficiency Ratio		74.9	%		84.6	%		77.5	%		79.5	%		73.2	%
Effect of Tax Benefit Related to Tax Exempt Income		(1.4	)		(1.7	)		(1.6	)		(1.7	)		(1.6	)
Efficiency Ratio (TE) (1)		73.5	%		82.9	%		75.9			77.8	%		71.6	%
Effect of Amortization of Intangibles		(0.9	)		(0.8	)		(1.0	)		(1.1	)		(1.2	)
Tangible Efficiency Ratio (TE) (1) (2)		72.6	%		82.1	%		74.9	%		76.7	%		70.4	%

⁽¹⁾ Fully taxable equivalent (TE) calculations include the tax benefit associated with related income sources that are tax-exempt using a marginal tax rate of 35%.

⁽²⁾  Tangible calculations eliminate the effect of goodwill and acquisition related intangible assets and the corresponding amortization expense on a tax-effected basis where applicable.

STATEMENTS: COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

	Years Ended December 31,
(dollars in thousands)	2014		2013		2012		2011		2010
Net income	$	105,450	$	65,103	$	76,395	$	53,538	$	48,826
Income tax expense		34,750		15,869		28,496		16,981		19,991
Income before income tax expense	$	140,200	$	80,972	$	104,891	$	70,519	$	68,817
Fixed charges
Interest on short-term and other borrowings	$	11,614	$	11,107	$	14,086	$	11,515	$	18,987
Fixed charges excluding interest on deposits		11,614		11,107		14,086		11,515		18,987
Interest on deposits		33,090		35,846		49,364		70,554		95,757
Fixed charges including interest on deposits	$	44,704	$	46,953	$	63,450	$	82,069	$	114,744
Preferred stock dividends		—		—		—		—		—
Fixed charges including preferred stock dividends	$	44,704	$	46,953	$	63,450	$	82,069	$	114,744
Earnings for ratio computations (1)
Excluding interest on deposits	$	151,814	$	92,079	$	118,977	$	82,034	$	87,804
Including interest on deposits	$	184,904	$	127,925	$	168,341	$	152,588	$	183,561
Ratio of earnings to fixed charges (2)
Excluding interest on deposits		13.07		8.29		8.45		7.12		4.62
Including interest on deposits		4.14		2.72		2.65		1.86		1.60
Ratio of earnings to fixed charges and preferred dividends (2)
Excluding interest on deposits		13.07		8.29		8.45		7.12		4.62
Including interest on deposits		4.14		2.72		2.65		1.86		1.60

⁽¹⁾ Earnings are the sum of income before income tax expense and fixed charges.

⁽²⁾  For the purposes of calculating the ratio of earning to fixed charges, fixed charges are the sum of interest and debt expenses, excluding interest on deposits, and, in the second alternative, fixed charges are the sum of interest and debt expenses including interest on deposits.

EX-13

Exhibit 13

This Annual Report, including the Financial Review and the Financial Statements and related Notes, contains forward-looking statements, which may include forecasts of our financial results and condition, expectations for our operations and business, and our assumptions for those forecasts and expectations. Do not unduly rely on forward-looking statements. Actual results may differ materially from our forward-looking statements due to several factors. Factors that could cause our actual results to differ materially from our forward-looking statements are described in this Report, including in the “Forward-Looking Statements” and “Risk Factors” sections, and in the “Regulation and Supervision” section of our Annual Report on Form 10-K for the year ended December 31, 2014 (“2014 Form 10-K”).

When we refer to “the Company,” “we,” “our” or “us” in this Report, we mean IBERIABANK Corporation and Subsidiaries (consolidated). When we refer to the “Parent,” we mean IBERIABANK Corporation. See the Glossary of Acronyms at the end of this Report for terms used throughout this Report.

To the extent that statements in this Report relate to future plans, objectives, financial results or performance of the Company, these statements are deemed to be forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Such statements, which are based on management’s current information, estimates and assumptions and the current economic environment, are generally identified by use of the words “may”, “plan”, “believe”, “expect”, “intend”, “will”, “should”, “continue”, “potential”, “anticipate”, “estimate”, “predict”, “project” or similar expressions, or the negative of these terms or other comparable terminology, including statements related to the expected timing of the closing of proposed mergers, the expected returns and other benefits of the proposed mergers to shareholders, expected improvement in operating efficiency resulting from the mergers, estimated expense reductions, the impact on and timing of the recovery of the impact on tangible book value, and the effect of the mergers on the Company’s capital ratios. The Company’s actual strategies and results in future periods may differ materially from those currently expected due to various risks and uncertainties.

Actual results could differ materially because of factors such as the level of market volatility, our ability to execute our growth strategy, including the availability of future bank acquisition opportunities, unanticipated losses related to the integration of, and refinements to purchase accounting adjustments for, acquired businesses and assets and assumed liabilities in these transactions, adjustments of fair values of acquired assets and assumed liabilities and of deferred taxes in acquisitions, actual results deviating from the Company’s current estimates and assumptions of timing and amounts of cash flows, credit risk of our customers, effects of the on-going correction in residential real estate prices and reduced levels of home sales, our ability to satisfy new capital and liquidity standards such as those imposed by the Dodd-Frank Act and those adopted by the Basel Committee and federal banking regulators, sufficiency of our allowance for loan losses, changes in interest rates, access to funding sources, reliance on the services of executive management, competition for loans, deposits and investment dollars, reputational risk and social factors, changes in government regulations and legislation, increases in FDIC insurance assessments, geographic concentration of our markets and economic conditions in these markets, rapid changes in the financial services industry, dependence on our operational, technological, and organizational systems or infrastructure and those of third-party providers of those services, hurricanes and other adverse weather events, the modest trading volume of our common stock, and valuation of intangible assets. Those and other factors that may cause actual results to differ materially from these forward-looking statements are discussed in the Company’s Annual Report on Form 10-K and other filings with the Securities and Exchange Commission (the “SEC”), available at the SEC’s website, http://www.sec.gov, and the Company’s website, http://www.iberiabank.com, under the heading “Investor Information.” All information in this discussion is as of the date of this Report. The Company undertakes no duty to update any forward-looking statement to conform the statement to actual results or changes in the Company’s expectations.

Included in this discussion and analysis are descriptions of the composition, performance, and credit quality of the Company’s loan portfolio. The Company has two primary descriptions of loans that are used to categorize the portfolio into its distinct risks and rewards to the consolidated financial statements: legacy loans and acquired loans. The accounting for acquired loans can differ materially from that of legacy loans. Additionally, certain acquired loans were acquired with loss protection provided by the FDIC, and the risks of the loans and foreclosed real estate acquired are significantly different from those assets not similarly covered by loss share agreements. Accordingly, the Company reports acquired loans subject to the loss share agreements as covered loans.

1

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

EXECUTIVE OVERVIEW

The Company is a $15.8 billion bank holding company primarily concentrated in commercial banking in the southeastern United States. We are shareholder- and client-focused, expect high performance from our associates, believe in a strong sense of community and strive to make the Company a great place to work. The Company strives to improve long-term shareholder returns by setting challenging financial goals and executing on these goals in consideration of the current and anticipated operating and regulatory environments. Management believes that improvement in core earnings drives shareholder value, and the Company has adopted a mission statement that is designed to provide guidance for our management, associates and Board of Directors regarding the sense of purpose and direction of the Company.

In 2014, the Board of Directors set long-term, strategic goals for executive management. Key long-term financial goals through 2016 and beyond are as follows:

• Return on Average Tangible Equity of 13% to 17%

• Tangible Efficiency Ratio of 60% or less

• Asset Quality in the top 10% of our peers

• Double-digit percentage growth in fully-diluted operating EPS

The Company also continues to focus on improving operating efficiency and profitability, as executive compensation programs were redesigned to align with strategic goals, profitability focus, and creation of shareholder value. The Company’s short-term incentive programs place greater emphasis on pre-established performance objectives (as opposed to discretionary objectives), while long-term incentive programs place greater emphasis on performance-based metrics (as opposed to time-based metrics).

Highlights of the Company’s operating performance in 2014 include:

• Continued improvement in operating efficiency through increased net revenues and reduced operating expenses:

• Non-acquisition-related cost-save initiatives were implemented over the last two years, resulting in annualized benefits of an estimated $11 million in 2014 and $24 million in 2013.

• Operating leverage improved as a result of organic revenue growth, driven by new and existing clients and their demand for loans and deposits.

• Acquisitions also contributed to the Company’s improvement in operating leverage, as the Company realized cost-saving opportunities on the acquired companies’ expense base through operational synergies while maintaining the acquirees’ net revenues.

2

TABLE 1—SELECTED FINANCIAL INFORMATION

	Years Ended December 31
(Dollars in thousands)	2014			2013			2012			2011			2010
Key Ratios
Efficiency Ratio		74.87	%		84.60	%		77.49	%		79.50	%		73.22	%
Tangible operating efficiency ratio (TE) (Non-GAAP)		72.63	%		82.08	%		74.91	%		76.71	%		70.43	%
Return on average assets		0.72	%		0.50	%		0.63	%		0.49	%		0.47	%
Return on average assets, operating basis (Non-GAAP)		0.81	%		0.71	%		0.67	%		0.61	%		0.50	%
Net interest margin (TE)		3.51	%		3.38	%		3.58	%		3.51	%		3.05	%
Non-interest income	$	173,628		$	168,958		$	175,997		$	131,859		$	133,890
Non-interest income, operating (Non-GAAP)		170,871			166,624			170,026			128,384			124,679
Non-interest expense		474,479			473,085			432,185			373,731			304,249
Non-interest expense, operating (Non-GAAP)		445,959			428,543			418,174			350,269			290,183

• The Company diversified its geographic presence through acquisitions and product mix growth by deepening relationships with commercial clients:

• The Company expanded its presence into Dallas, Texas through the acquisition of First Private and announced two acquisitions in Florida, which will continue to result in a more geographically diverse company. In 2014, the Company also diversified its growth in product mix and fortified its franchises in Louisiana (Teche) and Memphis (Trust One) through separate acquisitions. Additional information on these and other acquisitions is included in the “Acquisition Activity” section below.

• Beginning in 2012 and continuing into 2014, the Company began diversifying its product set, including expanding its operations across the U.S. Gulf Coast region. Over that time period, the Company’s efforts expanded its presence from Texas to Florida, including expanding into the Dallas, Texas market, and enhancing its presence in South Louisiana, South Florida, and Memphis, Tennessee. The Company has also diversified its product growth over the past year with additional investments in its retail and small business loan portfolios. This diversification of loan growth between commercial, retail, and small business loans has helped to limit the Company’s exposure to concentrations in certain markets, industries, and customers.

• The Company experienced loan and deposit growth from multiple markets and products:

• For the year, legacy loans grew 17%, while the mix of legacy loans moved to 72% commercial, 22% consumer, and 6% mortgage. Of the $1.4 billion in legacy loan growth, 70%, or $961 million, was a result of commercial loan growth, including $232 million in small business growth, while $419 million was from the Company’s consumer and mortgage loan portfolios. Of the Company’s 21 primary markets, 18 experienced loan growth during the year, led by Houston, New Orleans, Acadiana and Dallas.

• Total deposits grew $1.8 billion, or 17%, during 2014, with $619 million, or 24%, growth in non-interest bearing deposits. Non-interest bearing deposits increased to 26% of total deposits at December 31, 2014, up from 24% at December 31, 2013. Of the Company’s 21 primary markets, 17 had deposit growth in 2014, led by Acadiana, Houston, Memphis, Dallas, and Huntsville.

3

• The Company’s overall asset quality improved, continuing a multi-year trend, despite general economic conditions and a decrease in energy commodity prices toward the end of 2014:

• Over the past five years, nonperforming assets in the Company’s legacy loan portfolio have decreased from 1.14% to 0.37% of total legacy loans, while total nonperforming assets have decreased 50 basis points to 0.41% of total assets over the same period.

During 2014, the Company continued to execute its business model successfully, as evidenced by solid organic loan growth during the year, despite the challenges of the current operating environment, which include the ever-changing regulatory environment, increased competition, and continued interest rate pressure.

Acquisition Activity

Over the past 15 years, the Company’s growth has included growth from targeted acquisitions the Company determined would provide additional value to existing shareholders and be a strong strategic fit with the Company. The following diagram shows the Company’s growth in total assets (dollars are in billions) since its inception.

4

From 2009 through 2014, the Company completed the following acquisitions, presented with selected assets and liabilities acquired and intangible assets created for each acquisition:

TABLE 2—SUMMARY OF ACQUISITION ACTIVITY FROM 2009 TO 2014

(Dollars in millions)			Total
Acquisition	Acquisition Date		Tangible Assets Acquired		Total Loans Acquired		Total Deposits Acquired		Goodwill		Other Intangible Assets
CapitalSouth Bank		2009	$	610.7	$	363.1	$	517.9	$	—	$	0.4
Orion Bank		2009		2,377.3		961.1		1,883.1		—		10.4
Century Bank, FSB		2009		812.0		417.6		615.8		—		2.2
Sterling Bank		2010		305.5		151.3		287.0		7.1		1.6
OMNI BANCSHARES, Inc.		2011		680.7		441.4		635.6		63.8		0.8
Cameron Bancshares, Inc.		2011		685.0		382.1		567.3		71.4		5.2
Florida Trust Company		2011		—		—		—		0.1		1.3
Florida Gulf Bancorp, Inc.		2012		307.3		215.8		286.0		32.4		—
Trust One Bank - Memphis Operations		2014		181.9		86.5		191.3		8.6		2.6
Teche Holding Company		2014		870.1		700.5		639.6		80.4		7.4
First Private Holdings, Inc.		2014		351.4		299.3		312.3		26.3		0.5
Total Acquisitions, 2009-2014			$	7,181.9	$	4,018.7	$	5,935.9	$	290.1	$	32.4

In addition, during 2014, the Company’s subsidiary, LTC, acquired certain assets from The Title Company, LLC, a title office in Baton Rouge, Louisiana, and Louisiana Abstract and Title, LLC, a title office in Shreveport, Louisiana. These two acquisitions were immaterial and the assets recognized were primarily from goodwill and additional intangible assets.

During the fourth quarter of 2014, the Company also announced three additional acquisitions that are expected to close in 2015. The Company announced the signing of a definitive agreement to acquire Florida Bank Group, which will expand the Company’s presence to the Tampa, Florida MSA and extend it into Tallahassee and Jacksonville, Florida. Additionally, the Company signed a definitive agreement to acquire Old Florida, which will expand the Company’s presence into the Orlando, Florida MSA.

Lastly, the Company signed a definitive agreement to acquire Georgia Commerce, which will expand the Company’s presence into the Atlanta, Georgia MSA. With the completion of the Georgia Commerce acquisition, the Company will serve all five of the largest MSAs in the southeastern United States and have a meaningful presence in 10 of the 20 largest MSAs in the region. The Florida Bank Group, Old Florida, and Georgia Commerce acquisitions are subject to customary closing conditions, including the receipt of required regulatory approvals and the approval of the acquired companies’ shareholders.

5

The Company believes these acquisitions, as well as a continued focus on high quality organic growth, improvements in operating efficiency, and development of fee-based businesses, will allow the Company to achieve its long-term objectives into 2015 and continue to improve long-term shareholder value.

6

FINANCIAL OVERVIEW

Selected consolidated financial and other data for the past five years is shown in the following tables.

TABLE 3—SELECTED CONSOLIDATED FINANCIAL AND OTHER DATA⁽¹⁾

	Years Ended December 31
											2014 vs. 2013
(Dollars in thousands, except per share data)	2014		2013		2012		2011		2010		$ Change			% Change
Income Statement Data
Interest income	$	504,815	$	437,197	$	445,200	$	420,327	$	396,371	$	67,618			15	%
Interest expense		44,704		46,953		63,450		82,069		114,744		(2,249	)		(5	)
Net interest income		460,111		390,244		381,750		338,258		281,627		69,867			18
Provision for loan losses		19,060		5,145		20,671		25,867		42,451		13,915			270
Net interest income after provision for loan losses		441,051		385,099		361,079		312,391		239,176		55,952			15
Non-interest income		173,628		168,958		175,997		131,859		133,890		4,670			3
Non-interest expense		474,479		473,085		432,185		373,731		304,249		1,394			0
Income before income taxes		140,200		80,972		104,891		70,519		68,817		59,228			73
Income taxes		34,750		15,869		28,496		16,981		19,991		18,881			119
Net income		105,450		65,103		76,395		53,538		48,826		40,347			62
Earnings per share – basic		3.32		2.20		2.59		1.88		1.90		1.12			51
Earnings per share – diluted		3.30		2.20		2.59		1.87		1.88		1.10			50
Cash dividends per share		1.36		1.36		1.36		1.36		1.36		—			—

	As of December 31
(Dollars in thousands, except per share data)											2014 vs. 2013
	2014		2013		2012		2011		2010		$ Change		% Change
Balance Sheet Data
Total assets	$	15,758,605	$	13,365,550	$	13,129,678	$	11,757,928	$	10,026,766	$	2,393,055		18	%
Cash and cash equivalents		548,095		391,396		970,977		573,296		337,778		156,699		40
Loans, net of unearned income		11,441,044		9,492,019		8,498,580		7,388,037		6,035,332		1,949,025		21
Investment securities		2,275,813		2,090,906		1,950,066		1,997,969		2,019,814		184,908		9
Goodwill and other intangible assets, net		548,130		425,442		429,584		401,888		263,925		122,688		29
Deposits		12,520,525		10,737,000		10,748,277		9,289,013		7,915,106		1,783,526		17
Borrowings		1,248,996		961,043		726,422		848,276		652,579		287,953		30
Shareholders’ equity		1,852,849		1,530,979		1,529,868		1,482,661		1,303,457		321,869		21
Book value per share (2)		55.39		51.40		51.88		50.48		48.50		3.99		8
Tangible book value per share (2) (4)		39.11		37.17		37.34		36.80		38.68		1.94		5

7

	As of and For the Years Ended December 31
	2014			2013			2012			2011			2010
Key Ratios (3)
Return on average assets		0.72	%		0.50	%		0.63	%		0.49	%		0.47	%
Return on average common equity		6.17			4.26			5.05			3.77			3.91
Return on average tangible common equity (4)		9.05			6.20			7.21			5.30			5.27
Equity to assets at end of period		11.76			11.45			11.65			12.61			13.00
Earning assets to interest-bearing liabilities at end of period		135.15			132.74			127.62			121.74			119.27
Interest rate spread (5)		3.40			3.26			3.43			3.34			2.84
Net interest margin (TE) (5) (6)		3.51			3.38			3.58			3.51			3.05
Non-interest expense to average assets		3.24			3.64			3.57			3.43			2.95
Efficiency ratio (7)		74.87			84.60			77.49			79.50			73.22
Tangible efficiency ratio (TE) (Non-GAAP) (6) (7)		72.63			82.08			74.91			76.71			70.43
Common stock dividend payout ratio		42.03			62.11			52.50			73.61			74.75
Asset Quality Data (Legacy)
Nonperforming assets to total assets at end of period (8)		0.41	%		0.61	%		0.69	%		0.86	%		0.91	%
Allowance for credit losses to nonperforming loans at end of period (8)		246.26			175.35			150.57			132.98			122.59
Allowance for credit losses to total loans at end of period		0.91			0.95			1.10			1.40			1.40
Consolidated Capital Ratios
Tier 1 leverage capital ratio		9.36	%		9.70	%		9.70	%		10.45	%		11.24	%
Tier 1 risk-based capital ratio		11.18			11.57			12.92			14.94			18.48
Total risk-based capital ratio		12.31			12.82			14.19			16.20			19.74

⁽¹⁾ 2010 Balance Sheet, Income Statement, and Asset Quality Data, as well as Key Ratios and Consolidated Capital Ratios, are impacted by the Company’s acquisition of Sterling on July 23, 2010. 2011 data is impacted by the Company’s acquisitions of OMNI and Cameron on May 31, 2011 and FTC on June 14, 2011. 2012 data is impacted by the Company’s acquisition of Florida Gulf on July 31, 2012. 2014 data is impacted by the Company’s acquisitions of certain assets and liabilities of the Trust One - Memphis on January 17, 2014, Teche on May 31, 2014, and First Private on June 30, 2014.

⁽²⁾  Shares used for book value purposes are net of shares held in treasury at the end of the period.

⁽³⁾  With the exception of end-of-period ratios, all ratios are based on average daily balances during the respective periods.

⁽⁴⁾  Tangible calculations eliminate the effect of goodwill and acquisition-related intangible assets and the corresponding amortization expense on a tax-effected basis where applicable.

⁽⁵⁾  Interest rate spread represents the difference between the weighted average yield on earning assets and the weighted average cost of interest-bearing liabilities. Net interest margin represents net interest income as a percentage of average net earning assets.

⁽⁶⁾  Fully taxable equivalent (TE) calculations include the tax benefit associated with related income sources that are tax-exempt using a marginal tax rate of 35%.

⁽⁷⁾  The efficiency ratio represents noninterest expense as a percentage of total revenues. Total revenues are the sum of net interest income and noninterest income.

⁽⁸⁾  Nonperforming loans consist of nonaccruing loans and loans 90 days or more past due. Nonperforming assets consist of nonperforming loans and repossessed assets.

8

The Company’s net income available to common shareholders for the year ended December 31, 2014 totaled $105 million, or $3.30 per diluted share, compared to $65 million, or $2.20 per diluted share, for 2013. On an operating basis (non-GAAP), per share earnings were $3.73 per share, up $0.61 from the $3.12 in operating earnings per share in 2013. Key components of the Company’s 2014 performance are summarized below.

• Net interest income increased $70 million, or 18%, in 2014 when compared to 2013, a result of a $68 million, or 15%, increase in interest income and a $2 million decrease in interest expense. Interest income was positively affected by a $1.5 billion increase in average earning assets, due to both the addition of acquired earning assets in the current year and the organic growth in loans since December 31, 2013, and a seven basis point increase in the yield on earning assets. Compared to 2013, the Company’s net interest margin ratio on a tax-equivalent basis increased 13 basis points to 3.51% from 3.38% due to changes in the volume and mix of the Company’s assets and liabilities as well as rate decreases driven by federal funds, Treasury, and other Company borrowing rate decreases during 2014.

• The Company recorded a provision for loan losses of $19 million in 2014, $14 million higher than the provision recorded in 2013. The provision was impacted by loan growth during the period, but was tempered by an overall improvement in the Company’s asset quality, especially in its legacy portfolio. The improvement in asset quality from December 31, 2013 has offset the need for a higher allowance for loan losses as a result of loan growth in 2014. As of December 31, 2014, the allowance for loan losses as a percent of total loans was 1.14% compared to 1.51% at December 31, 2013.

• Non-interest income increased $5 million, or 3%, when compared to 2013, a result of a $7 million increase in service charges, a $3 million increase in ATM/debit card fee income, $4 million in income from BOLI, and a $2 million increase in broker commissions. These increases were partially offset by a $12 million decrease in mortgage income from 2013.

• From 2013 to 2014, non-interest expense increased $1 million, or less than 1%, while operating non-interest expenses increased $17 million, or 4%. The increase in operating non-interest expense was attributable primarily to the Company’s growth over the past twelve months, including higher salary and employee benefit costs of $14 million and increased occupancy and equipment and other branch expenses resulting from the Company’s expanded footprint.

• The Company paid a quarterly cash dividend of $0.34 per common share in each quarter of 2014, resulting in dividends of $1.36 for the year-to-date period. These amounts were consistent with the dividends paid in 2013 and 2012.

• Total assets at December 31, 2014 were $15.8 billion, up $2.4 billion, or 18%, from December 31, 2013. Legacy loan growth of $1.4 billion across many of the Company’s markets, net increases to acquired loans of $844 million, and $185 million in additional investment securities drove the increase in total assets. Offsetting these increases were decreases in covered assets and the receivables associated with the indemnification agreements with the FDIC. Due to the amortization and impairment of the FDIC loss share receivables, as well as cash receipts from the FDIC, the balances decreased $93 million, or 57%, since December 31, 2013, and covered loans decreased $275 million since the end of 2013.

• Total loans net of unearned income at December 31, 2014 were $11.4 billion, an increase of $1.9 billion, or 21%, from December 31, 2013. As noted above, loan growth during 2014 was driven by a 25% increase in non-covered loans. Covered loans decreased 38% from December 31, 2013, as covered loans were paid down or charged-off and submitted for reimbursement and the loss share coverage period for certain non-single family covered loans expired.

• Total customer deposits increased $1.8 billion, or 17%, to $12.5 billion at December 31, 2014. Non-interest-bearing deposits increased $619 million, or 24%, while interest-bearing deposits increased $1.2 billion, or 14%. Although deposit competition remained intense, the Company was able to generate growth across many of its deposit products.

• Shareholders’ equity increased $322 million, or 21% from year-end 2013. The increase was primarily driven by 3.3 million common shares issued in the Teche and First Private acquisitions, which resulted in additional equity of $215 million, as well as undistributed net income of $61 million and a $24 million increase in accumulated other comprehensive income (net of tax), a result of the change in the unrealized gain in the Company’s available for sale investment portfolio at the end of 2014.

The discussion and analysis included herein contains financial information determined by methods other than in accordance with GAAP. The Company’s management uses these non-GAAP financial measures in their analysis of the Company’s performance. These measures typically adjust GAAP performance measures to exclude the effects of the amortization of intangibles and include the tax benefit associated with revenue items that are tax-exempt, as well as adjust income available to common shareholders for certain significant activities or transactions that, in management’s opinion can distort period-to-period comparisons of the Company’s performance. Since the presentation of these GAAP performance measures and their impact differ between companies, management believes presentations of these non-GAAP financial measures provide useful supplemental information that is essential to a proper understanding of the operating results of the Company’s core businesses. These non-GAAP disclosures should not be viewed as a substitute for operating results determined in accordance with GAAP, nor are they necessarily comparable to non-GAAP performance measures that may be presented by other companies. Reconciliations of GAAP to non-GAAP disclosures are included in the table below.

9

TABLE 4—RECONCILIATIONS OF NON-GAAP FINANCIAL MEASURES

	2014									2013									2012
(Dollars in thousands, except per share amounts)	Pre-tax			After-tax			Per share (1)			Pre-tax			After-tax			Per share (1)			Pre-tax			After-tax			Per share (1)
Net income (loss) (GAAP)	$	140,200		$	105,450		$	3.30		$	80,972		$	65,103		$	2.20		$	104,891		$	76,395		$	2.59
Non-interest and other expense adjustments:
Merger-related expenses		15,093			10,104			0.32			783			509			0.02			5,123			3,330			0.10
Severance expenses		6,951			4,518			0.14			2,538			1,649			0.05			2,355			1,530			0.05
(Gain) Loss on sale of long-lived assets, net of impairment		7,073			4,597			0.14			37,183			24,169			0.81			2,902			1,886			0.05
Debt prepayment		—			—			—			2,307			1,500			0.05			—			—			—
(Reversal of) Provision for FDIC clawback liability		(797	)		(518	)		(0.02	)		797			518			0.02			—			—			—
Other non-operating non-interest expense		200			130			0.01			934			607			0.01			3,631			2,360			0.08
Income tax benefits		—			(2,959	)		(0.09	)		—			—			—			—			—			—
Total non-operating expenses		28,520			15,872			0.50			44,542			28,952			0.97			14,011			9,106			0.28
Non-interest income adjustments:
(Gain) loss on sale of investments, net		(773	)		(502	)		(0.01	)		(2,334	)		(1,517	)		(0.05	)		(3,775	)		(2,453	)		(0.08	)
Other non-interest income		(1,984	)		(1,817	)		(0.06	)		—			—			—			(2,196	)		(1,427	)		(0.05	)
Total non-operating income		(2,757	)		(2,319	)		(0.07	)		(2,334	)		(1,517	)		(0.05	)		(5,971	)		(3,880	)		(0.13	)
Operating earnings (non-GAAP)		165,963			119,003			3.73			123,180			92,538			3.12			112,931			81,621			2.74
Provision for (Reversal of) covered and acquired loan losses		6,018			3,912			0.12			(786	)		(511	)		(0.02	)		16,867			10,964			0.37
Other provision for loan losses		13,042			8,477			0.27			5,932			3,856			0.13			3,804			2,472			0.08
Pre-provision operating earnings (non-GAAP)	$	185,023		$	131,392		$	4.12		$	128,326		$	95,883		$	3.23		$	133,602		$	95,057		$	3.19

(1) Diluted per share amounts may not appear to foot due to rounding.

(2) After-tax amounts computed using a marginal tax rate of 35%.

10

(Dollars in thousands)	2014			2013			2012
Net interest income (GAAP)	$	460,111		$	390,244		$	381,750
Add: Effect of tax benefit on interest income		8,609			9,452			9,659
Net interest income (TE) (Non-GAAP)	$	468,720		$	399,696		$	391,409
Non-interest income (GAAP)	$	173,628		$	168,958		$	175,997
Add: Effect of tax benefit on non-interest income		2,947			1,964			1,981
Non-interest income (TE) (Non-GAAP)	$	176,575		$	170,922		$	177,978
Non-interest expense (GAAP)	$	474,479		$	473,085		$	432,185
Less: Intangible amortization expense		5,807			4,720			5,150
Tangible non-interest expense (Non-GAAP)	$	468,672		$	468,365		$	427,035
Net income (GAAP)	$	105,450		$	65,103		$	76,395
Add: Effect of intangible amortization, net of tax		3,775			3,068			3,348
Cash earnings (Non-GAAP)	$	109,225		$	68,171		$	79,743
Total assets (GAAP)	$	15,758,605		$	13,365,550		$	13,129,678
Less: Intangible assets, net		548,130			425,442			429,584
Total tangible assets (Non-GAAP)	$	15,210,475		$	12,940,108		$	12,700,094
Average assets (Non-GAAP)	$	14,632,685		$	13,003,988		$	12,096,972
Less: Average intangible assets, net		501,770			427,485			407,672
Total average tangible assets (Non-GAAP)	$	14,130,915		$	12,576,503		$	11,689,300
Total shareholders’ equity (GAAP)	$	1,852,849		$	1,530,979		$	1,529,868
Less: intangible assets, net		548,130			425,442			429,584
Total tangible shareholders’ equity (Non-GAAP)	$	1,304,719		$	1,105,537		$	1,100,284
Average shareholders’ equity (Non-GAAP)	$	1,708,051		$	1,527,193		$	1,513,517
Less: Average intangible assets, net		501,770			427,485			407,672
Average tangible shareholders’ equity (Non-GAAP)	$	1,206,281		$	1,099,708		$	1,105,845
Return on average equity (GAAP)		6.17	%		4.26	%		5.05	%
Add: Effect of intangibles		2.87			1.94			2.16
Return on average tangible common equity (Non-GAAP)		9.04	%		6.20	%		7.21	%
Efficiency ratio (GAAP)		74.9	%		84.6	%		77.5	%
Less: Effect of tax benefit related to tax-exempt income		1.4			1.7			1.6
Efficiency ratio (TE) (Non-GAAP)		73.5			82.9			75.9
Less: Effect of amortization of intangibles		0.9			0.8			1.0
Tangible efficiency ratio (TE) (Non-GAAP)		72.6	%		82.1	%		74.9	%
Cash Yield:
Earning assets average balance (GAAP)	$	13,235,541		$	11,735,392		$	10,832,415
Add: Adjustments		36,620			(51,008	)		(108,256	)
Earning assets average balance, as adjusted (Non-GAAP)	$	13,272,161		$	11,684,384		$	10,724,159
Net interest income (GAAP)	$	460,111		$	390,244		$	381,750
Add: Adjustments		(12,371	)		(11,092	)		(44,498	)
Net interest income, as adjusted (Non-GAAP)	$	447,740		$	379,152		$	337,252
Yield, as reported		3.51	%		3.38	%		3.56	%
Add: Adjustments		(0.10	)		(0.08	)		(0.37	)
Yield, as adjusted (Non-GAAP)		3.41	%		3.30	%		3.19	%

11

APPLICATION OF CRITICAL ACCOUNTING POLICIES AND ESTIMATES

In preparing financial reports, management is required to apply significant judgment to various accounting, reporting and disclosure matters. Management must use assumptions and estimates to apply these principles where actual measurement is not possible or practical. The accounting principles and methods used by the Company conform with accounting principles generally accepted in the United States and general bank accounting practices. Estimates and assumptions most significant to the Company relate primarily to the calculation of the allowance for credit losses, the accounting for acquired loans and the related FDIC loss share receivable on covered loans, and the valuation of goodwill, intangible assets and other purchase accounting adjustments. These significant estimates and assumptions are summarized in the following discussion and are further analyzed in the footnotes to the consolidated financial statements.

Allowance for Credit Losses (“Legacy ACL”)

The determination of the overall allowance for credit losses has two components, the allowance for legacy credit losses and the allowance for acquired credit losses. The allowance for acquired impaired credit losses is calculated as described in the “Accounting for Acquired Loans and the Allowance for Acquired Impaired Loans” section below. The Legacy ACL, which represents management’s estimate of probable losses inherent in the Company’s legacy loan portfolio, excluding acquired loans, involves a high degree of judgment and complexity. The Company’s policy is to establish reserves through provisions for credit losses on the consolidated statements of comprehensive income for estimated losses on delinquent and other problem loans when it is determined that losses are expected to be incurred on such loans. Management’s determination of the appropriateness of the Legacy ACL is based on various factors requiring judgments and estimates, including management’s evaluation of the credit quality of the portfolio (determined through the assignment of risk ratings, assessments of past due status and scores from credit agencies), past loss experience, current economic conditions, the volume and type of lending conducted by the Company, composition of the portfolio, the amount of the Company’s classified assets, seasoning of the loan portfolio, the status of past due principal and interest payments, and other relevant factors. Two areas in which management exercises judgment are the assessments of risk ratings on the Company’s commercial loan portfolio and the application of qualitative adjustments to the quantitative measurements across all portfolios. Other changes in estimates included in the estimation of the allowance for credit losses may also have a significant impact on the consolidated financial statements. For further discussion of the allowance for credit losses, see the Asset Quality and Allowance for Credit Losses sections of this analysis and Note 1 and Note 7 of the footnotes to the consolidated financial statements.

Accounting for Acquired Loans and the Allowance for Acquired Impaired Loans

The Company accounts for its acquisitions under ASC Topic No. 805, Business Combinations, which requires the use of the acquisition method of accounting. All identifiable assets acquired, including loans, are recorded at fair value. No allowance for credit losses related to the acquired loans is recorded on the acquisition date, as the fair value of the loans acquired incorporates assumptions regarding credit risk. Loans acquired are recorded on the acquisition date at fair value in accordance with the fair value methodology prescribed in ASC Topic No. 820, Fair Value Measurement, and in the case of covered loans excludes the shared-loss agreements with the FDIC. These fair value estimates associated with acquired loans include estimates related to market interest rates and undiscounted projections of future cash flows that incorporate expectations of prepayments and the amount and timing of principal, interest and other cash flows, as well as any shortfalls thereof.

Acquired loans are evaluated at acquisition and classified as purchased impaired (“acquired impaired”) or purchased non-impaired (“acquired non-impaired”). Acquired impaired loans exhibit (in management’s judgment) credit deterioration since origination to the extent that it is expected at the time of acquisition that the Company will be unable to collect all contractually required payments and include all covered loans. All other acquired loans are classified as acquired non-impaired.

Over the life of the acquired impaired loans, the Company continues to estimate the amount and timing of cash flows expected to be collected on individual loans or on pools of loans sharing common risk characteristics. These expected cash flow estimates are updated for new information on a quarterly basis. Once cash flow estimates are updated, the Company evaluates whether the present value of these cash flows, determined using effective interest rates, have decreased and if so, recognizes provisions for credit losses in its consolidated statement of comprehensive income. For any increases in cash flows expected to be collected, the Company adjusts the amount of accretable yield recognized on a prospective basis over the respective loan’s or pool’s remaining life.

The allowance for credit losses for acquired non-impaired loans is calculated similarly to the Legacy ACL.

Because the FDIC reimburses the Company for losses on certain covered loans acquired in 2009 and 2010, indemnification assets were recorded at fair value as of the acquisition dates. The initial values of the indemnification assets were based on estimated cash flows to be received over the expected life of the acquired assets, not to exceed the term of the indemnification agreements. The loss sharing term of the Company’s commercial and single family residential indemnification agreements are five years and ten years, respectively, from the date of acquisition.

12

Because the indemnification assets are measured on the same basis as the indemnified loans, subject to contractual and collectability limitations, the indemnification assets are impacted by changes in expected cash flows on covered assets. Increases in credit losses expected to occur within the loss share term are recorded as current period increases to the allowance for credit losses and increase the amount collectible from the FDIC by the applicable loss share percentage. Decreases in credit losses expected to occur within the loss share term reduce the amount collectible from the FDIC and increase the amount collectible from customers in the form of prospective accretion. Increases in the portion of indemnification asset collectible from customers are amortized to income. Periodic amortization represents the amount that is expected to result in symmetrical recognition of pool-level accretion and amortization over the shorter of 1) the life of the loans or 2) the life of the shared loss agreement.

The Company assesses the indemnification assets for collectability at the acquisition level based on three sources: 1) the FDIC, 2) OREO transactions, and 3) customers. Amounts collectible from the FDIC through loss reimbursements are comprised of losses currently expected within the loss share term. For certain covered assets, loss share coverage expires in the next 12 months. At December 31, 2014, the indemnification asset includes $20 million and $1 million related to these assets that are expected to be collected from the FDIC and OREO transactions, respectively. A current period impairment would be recorded to the extent that events or circumstances indicate that losses previously expected to occur within the loss share term are expected to occur subsequent to loss share termination. Amounts collectible through expected gains on the sale of OREO are written-up or impaired each period based on the best available information.

Loss assumptions used to measure the basis of the indemnified loans are consistent with the loss assumptions used to measure the indemnification assets.

A claim receivable is established within “Other assets” on the Company’s consolidated balance sheets when a loss is incurred and the indemnification asset is reduced when cash is received from the FDIC.

If expected loss severities for all acquired impaired loans were to increase by 10%, the Company would recognize a gross increase to the provision for credit losses of $3 million, which would be offset by a decrease of $1 million in the FDIC loss share receivable. Similarly, if expected loss severities for all acquired impaired loans were to decrease by 10%, the Company would recognize a gross decrease to the provision for credit losses of $1 million, which would be offset by an increase of $0.2 million in the FDIC loss share receivable.

For further discussion of the Company’s acquisition and loan accounting, see Note 1 and Note 7 of the footnotes to the consolidated financial statements.

Valuation of Goodwill, Intangible Assets and Other Purchase Accounting Adjustments

The Company accounts for acquisitions in accordance with ASC Topic No. 805, which requires the use of the acquisition method of accounting for business combinations. Under this method, the Company is required to record the assets acquired, including identified intangible assets, and liabilities assumed, at their fair value, which in many instances involves estimates based on third party valuations, such as appraisals, or internal valuations based on discounted cash flow analyses or other valuation techniques. The determination of the useful lives of intangible assets is subjective, as is the appropriate amortization period for such intangible assets. In addition, business combinations typically result in recording goodwill.

The Company performs a goodwill evaluation at least annually. As part of its testing, the Company first assesses qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If the results of the qualitative assessment indicate impairment, the Company determines the fair value of a reporting unit relative to its carrying amount to determine whether quantitative factors of impairment are present. When the Company determines that the fair value of the reporting unit is below its carrying amount, the Company determines the fair value of the reporting unit’s assets and liabilities, considering deferred taxes, and then measures impairment loss by comparing the implied fair value of goodwill with the carrying amount of that goodwill. Based on management’s assessment of the qualitative factors in its goodwill impairment test of its IBERIABANK Reporting Unit, the Company concluded that the fair value of the Company’s reporting unit was more likely than not above its carrying amount and accordingly did not recognize impairment in its tests of goodwill at October 1, 2014. Based on the testing performed in 2013 and 2014, management concluded that for the IBERIABANK, IMC, and LTC Reporting Units, respectively, goodwill was not impaired as of those dates. For additional information on goodwill and intangible assets, see Note 1 and Note 11 of the footnotes to the consolidated financial statements.

13

FINANCIAL CONDITION

EARNING ASSETS

Interest income associated with earning assets is the Company’s primary source of income. Earning assets are composed of interest-earning or dividend-earning assets, including loans, securities, short-term investments and loans held for sale. As a result of both acquired assets and organic growth, earning assets increased $2.2 billion, or 18%, during 2014. Earning assets averaged $13.2 billion during 2014, a $1.5 billion, or 13%, increase when compared to 2013. Major components of earnings assets at December 31 are shown in the following table:

TABLE 5—EARNING ASSETS COMPOSITION

(Dollars in thousands)	2014		2013		Increase (Decrease)
Legacy Loans
Commercial Loans	$	7,002,198	$	6,040,955	$	961,243		16	%
Mortgage Loans		527,694		414,372		113,322		27
Consumer Loans		2,138,822		1,832,994		305,828		17
Total Legacy Loans		9,668,714		8,288,321		1,380,393		17
Acquired Loans (Non-covered)		1,327,786		483,905		843,881		174
Covered Loans		444,544		719,793		(275,249	)	(38	)
Total Loans, Net of Unearned Income		11,441,044		9,492,019		1,949,025		21
FDIC Loss Share Receivables		69,627		162,312		(92,685	)	(57	)
Total Loans and FDIC Loss Share Receivables		11,510,671		9,654,331		1,856,340		19
Investment Securities		2,275,813		2,090,906		184,907		9
Other Earning Assets		515,715		338,351		177,364		52
Total Earning Assets	$	14,302,199	$	12,083,588	$	2,218,611		18	%

14

The year-end mix of earning assets is shown in the following charts.

15

The following discussion highlights the Company’s major categories of earning assets.

Loans

The Company’s total loan portfolio increased $1.9 billion, or 21%, to $11.4 billion at December 31, 2014, which was driven by non-covered loan growth of $2.2 billion during the year, but was offset by a $275 million, or 38%, decrease in covered loans. By loan type, the increase was primarily from commercial loan growth of $951 million and consumer loan growth of $505 million during 2014, 14% and 25% higher, respectively, than at the end of 2013.

The major categories of loans outstanding at December 31, 2014 and 2013 are presented in the following tables, segregated into covered, acquired non-covered and legacy loans.

TABLE 6—SUMMARY OF LOANS

	December 31, 2014
(Dollars in thousands)	Commercial				Residential Mortgage				Consumer and Other
	Real Estate		Business		1 - 4 Family		Construction		Indirect automobile		Home Equity		Credit Card		Other		Total
Covered	$	189,126	$	31,260	$	128,024	$	—	$	—	$	92,430	$	648	$	3,056	$	444,544
Acquired Non-Covered		497,949		93,549		424,579		—		392		217,699		—		93,618		1,327,786
Total Acquired		687,075		124,809		552,603		—		392		310,129		648		96,674		1,772,330
Legacy		3,718,058		3,284,140		495,638		32,056		396,766		1,290,976		72,745		378,335		9,668,714
Total loans	$	4,405,133	$	3,408,949	$	1,048,241	$	32,056	$	397,158	$	1,601,105	$	73,393	$	475,009	$	11,441,044
	December 31, 2013
	Commercial				Residential Mortgage				Consumer and Other
	Real Estate		Business		1 - 4 Family		Construction		Indirect automobile		Home Equity		Credit Card		Other		Total
Covered	$	387,332	$	37,025	$	154,025	$	—	$	—	$	137,122	$	679	$	3,610	$	719,793
Acquired Non-Covered		345,069		53,037		18,135		—		1,853		53,443		—		12,368		483,905
Total Acquired		732,401		90,062		172,160		—		1,853		190,565		679		15,978		1,203,698
Legacy		3,134,904		2,906,051		404,922		9,450		373,383		1,101,227		63,642		294,742		8,288,321
Total Loans	$	3,867,305	$	2,996,113	$	577,082	$	9,450	$	375,236	$	1,291,792	$	64,321	$	310,720	$	9,492,019

16

Loan Portfolio Components

The Company believes its loan portfolio is well diversified by product and geography throughout its footprint. The year-end loan portfolio is segregated into various components and markets in the following charts.

17

The Company’s loan to deposit ratio at December 31, 2014 and 2013 was 91.4% and 88.4%, respectively. The percentage of fixed rate loans to total loans decreased from 50% at the end of 2013 to 49% at December 31, 2014. The table below sets forth the composition of the loan portfolio at December 31, followed by a discussion of activity by major loan type.

TABLE 7—TOTAL LOANS BY LOAN TYPE

(Dollars in thousands)	2014				2013				2012				2011				2010
Commercial loans:
Real estate	$	4,405,133	39	%	$	3,867,305	41	%	$	3,631,543	43	%	$	3,363,891	46	%	$	2,647,107	44	%
Business		3,408,949	30			2,996,113	31			2,537,718	30			2,005,234	27			1,515,856	25
Total commercial loans		7,814,082	69			6,863,418	72			6,169,261	73			5,369,125	73			4,162,963	69
Mortgage loans:
Residential 1-4 family		1,048,241	9			577,082	6			471,183	5			522,357	7			616,550	10
Construction/owner-occupied		32,056	—			9,450	—			6,021	—			16,143	—			14,822	—
Total mortgage loans		1,080,297	9			586,532	6			477,204	5			538,500	7			631,372	10
Consumer loans:
Home equity		1,601,105	14			1,291,792	14			1,251,125	15			1,019,110	14			834,840	14
Indirect automobile		397,158	3			375,236	4			327,985	4			261,896	3			255,322	4
Other		548,402	5			375,041	4			273,005	3			199,406	3			150,835	3
Total consumer loans		2,546,665	22			2,042,069	22			1,852,115	22			1,480,412	20			1,240,997	21
Total loans	$	11,441,044	100	%	$	9,492,019	100	%	$	8,498,580	100	%	$	7,388,037	100	%	$	6,035,332	100	%

Commercial Loans

Total commercial loans increased $951 million, or 14%, from December 31, 2013, with $1.2 billion, or 18%, in non-covered loan growth and a decrease in covered commercial loans of $204 million, or 48%. During 2014, the Company’s non-covered acquired commercial loans increased $193 million on a net basis (acquired commercial loans from Teche, First Private and Trust One-Memphis were offset partially by loan payments and charge-offs), while legacy commercial loan growth during 2014 totaled $961 million. The Company continued to attract and retain commercial customers in 2014 as commercial loans were 69% of the total loan portfolio at December 31, 2014. Unfunded commitments on commercial loans were $2.8 billion at December 31, 2014, an increase of $158 million, or 6%, when compared to the end of the prior year.

Commercial real estate loans include loans to commercial customers for long-term financing of land and buildings or for land development or construction of a building. These loans are repaid from revenues generated from the business of the borrower. Commercial real estate loans increased $538 million, or 14%, during the year, driven by an increase in non-covered commercial real estate loans of $736 million, or 21%. At December 31, 2014, commercial real estate loans totaled $4.4 billion, or 39% of the total loan portfolio, compared to 41% at December 31, 2013. The Company’s underwriting standards generally provide for loan terms of three to five years, with amortization schedules of generally no more than twenty years. Low loan-to-value ratios are maintained and usually limited to no more than 80% at the time of origination. In addition, the Company obtains personal guarantees of the principals as additional security for most commercial real estate loans.

Commercial business loans represent loans to commercial customers to finance general working capital needs, equipment purchases and other projects where repayment is derived from cash flows resulting from business operations. The Company originates commercial business loans on a secured and, to a lesser extent, unsecured basis. The Company’s commercial business loans may be term loans or revolving lines of credit. Term loans are generally structured with terms of no more than three to five years, with amortization schedules of generally no more than seven years. Commercial business term loans are generally secured by equipment, machinery or other corporate assets. The Company also provides for revolving lines of credit generally structured as advances upon perfected security interests in accounts receivable and inventory. Revolving lines of credit generally have annual maturities. The Company obtains personal guarantees of the principals as additional security for most commercial business loans. As of December 31, 2014, commercial loans not secured by real estate totaled $3.4 billion, or 30% of the total loan portfolio. This represents a $413 million, or 14%, increase from December 31, 2013.

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The following table details the Company’s commercial loans by state.

TABLE 8—COMMERCIAL LOANS BY STATE

(Dollars in thousands)	Louisiana		Florida		Alabama		Texas		Arkansas		Other		Total
December 31, 2014
Covered	$	—	$	220,386	$	—	$	—	$	—	$	—	$	220,386
Non-Covered Acquired		351,148		128,582		33,845		52,438		—		25,485		591,498
Legacy		3,015,447		342,246		901,705		1,633,162		676,691		432,947		7,002,198
Total commercial loans	$	3,366,595	$	691,214	$	935,550	$	1,685,600	$	676,691	$	458,432	$	7,814,082
December 31, 2013
Covered	$	—	$	363,372	$	60,985	$	—	$	—	$	—	$	424,357
Non-Covered Acquired		284,572		113,534		—		—		—		—		398,106
Legacy		2,751,426		222,324		795,759		1,310,352		634,071		327,023		6,040,955
Total commercial loans	$	3,035,998	$	699,230	$	856,744	$	1,310,352	$	634,071	$	327,023	$	6,863,418

Energy-related Loans

The Company’s loan portfolio includes energy-related loans totaling $881 million outstanding at December 31, 2014, or 8% of total loans, compared to $764 million at December 31, 2013, an increase of $117 million, or 15%. At December 31, 2014, exploration and production (“E&P”) loans accounted for 52% of energy-related loans and 56% of energy-related commitments. Midstream companies accounted for 17% of both energy-related loans and commitments, while service company loans totaled 31% of energy-related loans and 27% of energy commitments.

As a result of the significant decline in energy commodity prices toward the end of 2014, the Company continues to assess its exposure to the energy industry and continues to take steps to identify the risk the decline in energy prices has on both the asset quality of its energy lending portfolio, as well as the asset quality of the Company’s clients in its markets with higher exposure to these declines, including Houston, Texas, Southwest Louisiana, and Acadiana.

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Generally, service companies are the most affected by fluctuations in commodity prices, while midstream companies are least affected. Based on the composition of its portfolio at December 31, 2014, the Company believes most of its exposure is in areas of lower credit risk. The Company believes it has generally lent to borrowers in the energy industry that are neither heavily leveraged nor lack either liquidity or guarantor support. Further, the Company’s borrowers participate in a broadly diversified set of basins and a variety of oil and gas related activities.

The Company will continue to monitor its exposure to change in energy commodity prices and manage its risks throughout 2015.

Mortgage Loans

Residential mortgage loans consist of loans to consumers to finance a primary residence. The vast majority of the residential mortgage loan portfolio is comprised of 1-4 family mortgage loans secured by properties located in its market areas and originated under terms and documentation that permit their sale in the secondary market. Larger mortgage loans of current and prospective private banking clients are generally retained to enhance relationships, but also tend to be more profitable due to the expected shorter durations and relatively lower servicing costs associated with loans of this size. The Company does not originate or hold high loan-to-value, negative amortization, option ARM, or other exotic mortgage loans in its portfolio. In the third quarter of 2012, the Company began to invest in loans that would be considered subprime (e.g., loans with a FICO score of less than 620) in order to ensure compliance with relevant regulations. The Company expects to continue to invest in subprime loans through additional secondary market purchases, as well as direct originations, in 2015, albeit up to a limited amount. The Company did not make a significant investment in subprime loans in 2014. At December 31, 2014, the Company had $119 million in subprime mortgage loans.

The Company continues to sell the majority of conforming mortgage loan originations in the secondary market rather than assume the interest rate risk associated with these longer term assets. Upon the sale, the Company retains servicing on a limited portion of these loans. Total residential mortgage loans increased $494 million, or 84% compared to December 31, 2013, the result of private banking originations and acquired mortgage loans. Offsetting these purchases were decreases in the Company’s covered mortgage loans of $26 million as existing loans were paid down.

Consumer and Credit Card Loans

The Company offers consumer loans in order to provide a full range of retail financial services to its customers. The Company originates substantially all of its consumer loans in its primary market areas. At December 31, 2014, $2.5 billion, or 22%, of the total loan portfolio was comprised of consumer loans, compared to $2.0 billion, or 22%, at the end of 2013. Total consumer loans increased $505 million from December 31, 2013, with 34% of the growth ($173 million) from personal loans (including credit card loans), and the remaining growth split between indirect automobile loans ($22 million) and home equity loans and lines of credit ($309 million). Of the $505 million increase from December 31, 2013, $306 million, or 61%, was a result of legacy consumer loan growth.

Consistent with 2013, home equity loans comprised the largest component of the consumer loan portfolio at December 31, 2014. Home equity lending allows borrowers to borrow against the equity in their home and is secured by a first or second mortgage on the borrower’s residence. Real estate market values at the time the loan is secured affect the amount of credit extended. Changes in these values may impact the extent of potential losses. The balance of home equity loans increased $309 million during the year to $1.6 billion at December 31, 2014. The Company’s sales and marketing efforts in 2014 have also contributed to the growth in non-covered home equity loans since December 31, 2013. Unfunded commitments related to home equity loans and lines were $694 million at December 31, 2014, an increase of $180 million versus the prior year. The Company has approximately $566 million of loans with junior liens where the Company does not hold or service the respective loan holding senior lien. The Company believes it has addressed the risks associated with these loans in its allowance for credit losses.

Indirect automobile loans comprised the second largest component of the Company’s consumer loan portfolio. Independent automobile dealerships originate these loans based upon the Company’s credit decisioning. The Company relies on the dealerships, in part, for loan qualifying information. To that extent, there is risk inherent in the Company’s indirect automobile loan portfolio associated with fraud or negligence by the automobile dealership. In January 2015, the Company announced it will exit the indirect automobile lending business. The Company concluded compliance risk associated with these loans had become unbalanced relative to potential returns generated by the business on a risk-adjusted basis. At December 31, 2014, indirect automobile loans totaled $397 million, or 3% of the total loan portfolio. Based on current amortization rates and expected maturities, the vast majority of these loans will be exited within four years.

The Company’s credit card loans totaled $73 million at December 31, 2014, a 14% increase from the end of 2013. The increase in credit card loans was the result of an increase in usage by customers at the end of the year. Year-to-date average credit card balances have increased from $55.4 million in 2013 to $66.4 million in 2014, a 20% increase.

The remainder of the consumer loan portfolio at December 31, 2014 consisted of direct automobile loans and other personal loans, and comprised 4% of the overall loan portfolio. Loans of this nature are vulnerable to unemployment and other consumer economic measures. At the end of 2014, the Company’s direct automobile loans totaled $150 million, a $57 million increase over December 31, 2013, and the Company’s other personal consumer loans were $325 million, a $107 million, or 49%, increase from December 31, 2013, primarily a result of installment loans and personal lines of credit.

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In order to assess the risk characteristics of the loan portfolio, the Company considers the current U.S. economic environment and that of its primary market areas as well as risk factors listed above within the major categories of loans.

Additional information on the Company’s consumer loan portfolio is presented in the following tables. For the purposes of Table 10, unscoreable consumer loans have been included with loans with FICO scores below 660. FICO scores reflect information available as of the dates indicated.

TABLE 9—CONSUMER LOANS BY STATE

(Dollars in thousands)	Louisiana		Florida		Alabama		Texas		Arkansas		Other		Total
December 31, 2014
Covered	$	—	$	90,908	$	5,226	$	—	$	—	$	—	$	96,134
Non-Covered Acquired		186,147		30,671		830		75,473		—		18,588		311,709
Legacy		924,255		146,979		229,290		84,087		224,605		529,606		2,138,822
Total consumer loans	$	1,110,402	$	268,558	$	235,346	$	159,560	$	224,605	$	548,194	$	2,546,665
December 31, 2013
Covered	$	—	$	132,174	$	9,237	$	—	$	—	$	—	$	141,411
Non-Covered Acquired		43,564		24,100		—		—		—		—		67,664
Legacy		793,250		76,941		197,104		65,574		205,585		494,540		1,832,994
Total consumer loans	$	836,814	$	233,215	$	206,341	$	65,574	$	205,585	$	494,540	$	2,042,069

TABLE 10—CONSUMER LOANS BY FICO SCORE

(Dollars in thousands)	Below 660		660-720		Above 720		Discount			Total
December 31, 2014
Covered	$	43,005	$	23,496	$	50,522	$	(20,889	)	$	96,134
Non-Covered Acquired		55,757		70,672		197,956		(12,676	)		311,709
Legacy		405,243		538,361		1,195,218		—			2,138,822
Total consumer loans	$	504,005	$	632,529	$	1,443,696	$	(33,565	)	$	2,546,665
December 31, 2013
Covered	$	68,333	$	35,628	$	76,500	$	(39,050	)	$	141,411
Non-Covered Acquired		22,449		18,664		33,655		(7,104	)		67,664
Legacy		322,694		466,263		1,044,037		—			1,832,994
Total consumer loans	$	413,476	$	520,555	$	1,154,192	$	(46,154	)	$	2,042,069

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Loan Maturities

The following table sets forth the scheduled contractual maturities of the Company’s total loan portfolio at December 31, 2014, unadjusted for scheduled principal reductions, prepayments or repricing opportunities. Demand loans, loans having no stated schedule of repayments and no stated maturity, and overdraft loans are reported as due in one year or less. The average life of a loan may be substantially less than the contractual terms because of prepayments. As a result, scheduled contractual amortization of loans is not reflective of the expected term of the Company’s loan portfolio. Of the loans with maturities greater than one year, approximately 77% of the balance of these loans bears a fixed rate of interest.

TABLE 11—LOAN MATURITIES BY LOAN TYPE

(Dollars in thousands)	One Year or Less		One Through Five Years		After Five Years		Total
Commercial - Real estate	$	1,798,438	$	1,761,015	$	845,680	$	4,405,133
Commercial - Business		1,601,011		1,411,574		396,364		3,408,949
Mortgage - Residential 1-4 family		169,998		224,143		654,100		1,048,241
Mortgage - Construction		4,158		6,741		21,157		32,056
Consumer		1,202,141		529,839		814,685		2,546,665
Total	$	4,775,746	$	3,933,312	$	2,731,986	$	11,441,044

Mortgage Loans Held for Sale

Loans held for sale increased $12 million, or 9%, to $140 million at December 31, 2014. In 2014, the Company originated $1.7 billion in mortgage loans, offset by sales of $1.6 billion.

Loans held for sale have primarily been fixed-rate single-family residential mortgage loans under contracts to be sold in the secondary market. In most cases, loans in this category are sold within thirty days of closing. Buyers generally have recourse to return a purchased loan to the Company under limited circumstances. Recourse conditions may include fraud in the origination, breach of representations or warranties, and documentation deficiencies. At December 31, 2014, mortgage loans held for sale subject to repurchase were immaterial. The Company has recorded a reserve of $1 million for potential repurchases at December 31, 2014. An insignificant number of loans have been returned to the Company.

Asset Quality

The Company’s transition over time to a commercial bank brings the potential for increased risks in the form of potentially higher levels of charge-offs and nonperforming assets, as well as increased rewards in the form of potentially increased levels of shareholder returns. As the risks within the loan portfolio have evolved, management has responded by tightening underwriting guidelines and procedures, implementing more conservative loan charge-off and nonaccrual guidelines, revising loan policies and developing an internal loan review function. As a result of management’s enhancements to underwriting loan risk/return dynamics, the credit quality of the loan portfolio has remained favorable when compared to peers. Management believes that it has demonstrated proficiency in managing credit risk through timely identification of significant problem loans, prompt corrective action, and transparent disclosure. Overall asset quality improved during 2014, primarily as a result of decreases in the number and amount of past due loans and nonperforming assets. Consistent with prior years, the assets and liabilities purchased and assumed through the Company’s four failed bank acquisitions continue to have a disproportionate impact on overall asset quality. The Company continues to closely monitor the risk-adjusted level of return within the loan portfolio.

Written underwriting standards established by management and approved by the Board of Directors govern the lending activities of the Company. The commercial credit department, in conjunction with senior lending personnel, underwrites all commercial business and commercial real estate loans. The Company provides centralized underwriting of all residential mortgage, construction and consumer loans. Established loan origination procedures require appropriate documentation, including financial data and credit reports. For loans secured by real property, the Company generally requires property appraisals, title insurance or a title opinion, hazard insurance, and flood insurance, where appropriate.

Loan payment performance is monitored and late charges are assessed on past due accounts. A centralized department administers delinquent loans. Every effort is made to minimize any potential loss, including instituting legal proceedings as necessary. Commercial loans are periodically reviewed through a loan review process to provide an independent assessment of a loan’s risks. All other loans are also subject to loan reviews through a periodic sampling process. The Company exercises significant judgment in determining the risk classification of its commercial loans.

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The Company utilizes an asset risk classification system in accordance with guidelines established by the FRB as part of its efforts to monitor commercial asset quality. In connection with their examinations of insured institutions, both federal and state examiners also have the authority to identify problem assets and, if appropriate, reclassify them. There are three classifications for problem assets: “substandard,” “doubtful” and “loss”, all of which are considered adverse classifications. Substandard assets have one or more defined weaknesses and are characterized by the distinct possibility that the Company will sustain some loss if the weaknesses are not corrected. Doubtful assets have the weaknesses of substandard assets with the additional characteristic that the weaknesses make collection or liquidation in full questionable, and there is a high probability of loss based on currently existing facts, conditions and values. An asset classified as loss is considered not collectable and of such little value that continuance as an asset of the Company is not warranted. Commercial loans with adverse classifications are reviewed by the Board Risk Committee of the Board of Directors periodically. Loans are placed on nonaccrual status when they are 90 days or more past due unless, in the judgment of management, the probability of timely collection of interest is deemed to be sufficient to warrant further accrual. When a loan is placed on nonaccrual status, the accrual of interest income ceases and accrued but unpaid interest attributable to the current year is reversed against interest income. Accrued interest receivable attributable to the prior year is recorded as a charge-off to the allowance for credit losses.

Real estate acquired by the Company through foreclosure or by deed-in-lieu of foreclosure is classified as OREO, and is recorded at the lesser of the related loan balance (the pro-rata carrying value for acquired loans) or estimated fair value less estimated costs to sell.

Under GAAP, certain loan modifications or restructurings are designated as TDRs. In general, the modification or restructuring of a debt constitutes a TDR if the Company, for economic or legal reasons related to the borrower’s financial difficulties, grants a concession to the borrower that the Company would not otherwise consider under current market conditions.

Non-performing Assets

The Company defines non-performing assets as non-accrual loans, accruing loans more than 90 days past due, OREO and foreclosed property. Management continually monitors loans and transfers loans to non-accrual status when warranted.

Covered loans represent loans acquired through failed bank acquisitions and continue to be covered by loss sharing agreements with the FDIC, whereby the FDIC reimburses the Company for the majority of the losses incurred during the loss share claim period. In addition to covered loans, the Company also accounts for loans formerly covered by loss sharing agreements with the FDIC, other loans acquired with deteriorated credit quality, as well as all loans acquired with significant discounts that did not exhibit deteriorated credit quality at acquisition, in accordance with ASC Topic 310-30. Collectively, all loans accounted for under ASC 310-30 are referred to as purchased impaired loans. Application of ASC Topic 310-30 results in significant accounting differences, compared to loans originated or acquired by the Company that are not accounted for under ASC 310-30. At acquisition, purchased impaired loans were individually evaluated and assigned to loan pools based on common risk characteristics, which included loan performance at the time of acquisition, loan type based on regulatory reporting guidelines, and/or the nature of collateral. The acquisition date fair values of each pool were estimated based on the expected cash flows of the underlying loans. Certain loan level information, including outstanding principal balance, maturity, term to re-price (if a variable rate loan), and interest rate were used to estimate the expected cash flows for each loan pool. ASC 310-30 does not permit carry over or recognition of an allowance for credit losses at acquisition. Credit quality deterioration, also referred to as credit losses, evident at acquisition with individual loans was reflected in the acquisition date fair value through the reduction of cash flows expected to be received over the life of loans. A provision for credit losses is recognized and an allowance for credit losses is recorded subsequent to acquisition to the extent that re-estimated expected losses exceed losses estimated at acquisition. Purchased impaired loans were considered to be performing as of the acquisition date regardless of their past due status based on their contractual terms. In accordance with regulatory reporting guidelines, purchased impaired loans that are contractually past due are reported as past due and accruing based on the number of days past due.

Due to the significant difference in accounting for covered loans and the related FDIC loss sharing agreements, as well as non-covered acquired loans accounted for as purchased impaired loans, and given the significant amount of acquired impaired loans that are past due but still accruing, the Company believes inclusion of these loans in certain asset quality ratios that reflect nonperforming assets in the numerator or denominator (or both) results in significant distortion to these ratios. In addition, because loan level charge-offs related to purchased impaired loans are not recognized in the financial statements until the cumulative amounts exceed the original loss projections on a pool basis, the net charge-off ratio for acquired loans is not consistent with the net charge-off ratio for other loan portfolios. The inclusion of these loans in certain asset quality ratios could result in a lack of comparability across quarters or years, and could impact comparability with other portfolios that were not impacted by purchased impaired loan accounting. The Company believes that the presentation of certain asset quality measures excluding either covered loans or all purchased impaired loans, as indicated below, and related amounts from both the numerator and denominator provides better perspective into underlying trends related to the quality of its loan portfolio. Accordingly, the asset quality measures in the tables below present asset quality information excluding either covered loans or all purchased impaired loans, as indicated within each table, and related amounts.

Non-performing assets excluding acquired loans decreased $16 million, or 22%, compared to December 31, 2013, as non-accrual loans decreased $9 million, OREO decreased $7 million, and accruing loans 90 days or more past due decreased less than $1 million. Including TDRs that are in compliance with their modified terms, total non-performing assets and TDRs decreased $16.0 million over the past twelve months.

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The following table sets forth the composition of the Company’s legacy nonperforming assets, including accruing loans past due 90 or more days and TDRs, as of December 31.

TABLE 12—NONPERFORMING ASSETS AND TROUBLED DEBT RESTRUCTURINGS

(LEGACY)

																2014 vs. 2013
(Dollars in thousands)	2014			2013			2012			2011			2010			$ Change			% Change
Non-accrual loans:
Commercial	$	9,980		$	24,471		$	32,313		$	42,655		$	35,457		$	(14,491	)		(59	)%
Residential mortgage		14,363			10,237			8,367			4,910			5,917			4,126			40
Consumer		10,627			8,979			7,237			6,889			8,122			1,648			18
Total non-accrual loans		34,970			43,687			47,917			54,454			49,496			(8,717	)		(20	)
Accruing loans 90 days or more past due		754			1,075			1,371			1,841			1,455			(321	)		(30	)
Total non-performing loans		35,724			44,762			49,288			56,295			50,951			(9,038	)		(20	)
OREO and foreclosed property		21,243			28,272			26,380			21,382			18,496			(7,029	)		(25	)
Total non-performing assets		56,967			73,034			75,668			77,677			69,447			(16,067	)		(22	)
Troubled debt restructuring in compliance with modified terms		1,430			1,376			2,354			55			14,968			54			4
Total non-performing assets and troubled debt restructurings	$	58,397		$	74,410		$	78,022		$	77,732		$	84,415		$	(16,013	)		(22	)
Non-performing loans to total loans		0.37	%		0.54	%		0.73	%		1.05	%		1.14	%
Non-performing assets to total assets		0.41	%		0.61	%		0.69	%		0.86	%		0.91	%
Non-performing assets and troubled debt restructurings to total assets		0.42	%		0.62	%		0.71	%		0.86	%		1.10	%
Allowance for credit losses to non-performing loans		246.26	%		175.35	%		150.57	%		132.98	%		122.59	%
Allowance for credit losses to total loans		0.91	%		0.95	%		1.10	%		1.40	%		1.40	%

⁽¹⁾  Non-performing loans and assets include accruing loans 90 days or more past due.

⁽²⁾  OREO and foreclosed property at December 31, 2014 and 2013 include $11.6 million and $9.2 million, respectively, of former bank properties held for development or resale.

⁽³⁾  Troubled debt restructurings in compliance with modified terms for December 31, 2014 and 2013 do not include $2.2 million and $18.5 million, respectively, in troubled debt restructurings included in total non-accrual loans above.

⁽⁴⁾  Total loans, total non-performing loans, and total assets exclude loans and assets covered by FDIC loss share agreements and acquired loans discussed below.

⁽⁵⁾  The allowance for credit losses excludes the portion of the allowance related to covered loans and acquired non-covered loans discussed below.

Non-performing loans were 0.37% of total legacy loans at December 31, 2014, 17 basis points lower than at December 31, 2013. If covered loans and acquired loans accounted for in pools that meet non-performing criteria are included, non-performing loans were 1.50% of total loans at December 31, 2014 and 2.87% at December 31, 2013. The allowance for credit losses as a percentage of non-performing loans was 246.26% at December 31, 2014 and 175.35% at December 31, 2013. Including covered loans and pooled loans, the allowance for loan losses as a percentage of total loans was 1.14% at December 31, 2014 and 1.51% at December 31, 2013.

Non-performing assets as a percentage of total assets have remained at relatively low levels. Legacy nonperforming assets were 0.41% of total legacy assets at December 31, 2014, 20 basis points below December 31, 2013. Consistent with the overall improvement in asset quality, the Company’s reserve for credit losses as a percentage of loans decreased four basis points from 2013 to 0.91% at December 31, 2014.

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Loans defined as TDRs not included in non-performing assets were $1 million at the end of 2014 and 2013. Legacy TDRs totaled $4 million at December 31, 2014, $16 million, or 82%, lower than at December 31, 2013, driven primarily from the payoff of one relationship during 2014, which totaled $10 million at December 31, 2013. There were no additions to legacy TDRs during 2014.

The Company had gross charge-offs on legacy loans of $11 million during the year ended December 31, 2014. Offsetting these charge-offs were recoveries of $6 million. As a result, net charge-offs on legacy loans during 2014 were $5 million, or 0.06% of average loans, as compared to net charge-offs of $4 million, or 0.05%, for 2013.

At December 31, 2014, excluding loans covered by the FDIC loss share agreements (see “Covered Loans” below), the Company had $123 million of assets classified as substandard, $3 million of assets classified as doubtful, and no assets classified as loss (before the application of loan discounts to acquired loans). Accordingly, the aggregate of the Company’s classified assets was 0.79% of total assets, 1.09% of total loans, and 1.14% of non-covered loans. At December 31, 2013, classified assets totaled $148 million, or 1.11% of total assets, 1.57% of total loans, and 1.70% of non-covered loans. The decrease in classified assets is consistent with the overall improvement in asset quality since December 31, 2013. As with non-classified assets, a reserve for credit losses has been recorded for all substandard loans at December 31, 2014 according to the Company’s allowance policy.

In addition to the problem loans described above, excluding covered loans, there were $83 million of loans classified as special mention at December 31, 2014, which in management’s opinion were subject to potential future rating downgrades. Special mention loans are defined as loans where known information about possible credit problems of the borrowers causes management to have some doubt as to the ability of these borrowers to comply with the present loan repayment terms, which may result in future disclosure of these loans as nonperforming. Special mention loans increased $16 million, or 24%, from December 31, 2013, and is attributable to both loan growth and a movement of loans from substandard to special mention, as special mention loans were 0.76% of total non-covered loans at both December 31, 2014 and 2013.

As noted above, the asset quality of the Company’s energy-related loan portfolio may be impacted by a sustained decline in commodity prices. At December 31, 2014, however, only $35,000 in energy-related loans, or less than 1%, was rated as substandard. There were no energy-related credits rated as either doubtful or special mention.

Past Due Loans

Past due status is based on the contractual terms of loans. The majority of the Company’s non-covered portfolio exhibited an improvement in past due status from the end of the previous year.

At December 31, 2014, total non-covered loans past due were 1.18% of total loans, a decrease of seven basis points from December 31, 2013. Including covered loans, loans past due 30 days or more were 1.92% of total loans before discount adjustments at December 31, 2014 and 3.24% at December 31, 2013. Past due non-covered loans (including nonaccrual loans) increased $21 million, or 19%, from December 31, 2013, and can be attributed to a higher level of loans past due less than 60 days. Additional information on non-covered past due loans is presented in the following table.

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TABLE 13—PAST DUE NON-COVERED LOAN SEGREGATION

	December 31, 2014
	Legacy					Acquired					Total Non-covered
(Dollars in thousands)	Amount		% of Outstanding Balance			Amount		% of Outstanding Balance			Amount		% of Outstanding Balance
Accruing loans:
30-59 days past due	$	23,365		0.24	%	$	11,537		0.83	%	$	34,902		0.32	%
60-89 days past due		6,202		0.06			3,848		0.28			10,050		0.09
90-119 days past due		738		0.01			567		0.04			1,305		0.01
120 days past due or more		16		—			19		—			35		—
		30,321		0.31			15,971		1.15			46,292		0.42
Non-accrual loans (1)		34,970		0.36			48,885		3.51			83,855		0.76
	$	65,291		0.67	%	$	64,856		4.66	%	$	130,147		1.18	%

	December 31, 2013
	Legacy					Acquired					Total Non-Covered
(Dollars in thousands)	Amount		% of Outstanding Balance			Amount		% of Outstanding Balance			Amount		% of Outstanding Balance
Accruing loans:
30-59 days past due	$	13,426		0.16	%	$	3,251		0.67	%	$	16,677		0.19	%
60-89 days past due		7,965		0.10			2,580		0.53			10,545		0.12
90-119 days past due		108		—			103		0.02			211		—
120 days past due or more		967		0.01			437		0.09			1,404		0.02
		22,466		0.27			6,371		1.32			28,837		0.33
Non-accrual loans (1)		43,687		0.53			36,725		7.59			80,412		0.92
	$	66,153		0.80	%	$	43,096		8.91	%	$	109,249		1.25	%

⁽¹⁾  The acquired loans balance represents the outstanding balance of loans that would otherwise meet the Company’s definition of nonaccrual loans.

The $18 million increase in loans past due 30-59 days is a result of a limited number of commercial loans that moved to past due at December 31, 2014. Three commercial loans accounted for $11 million, or 31%, of total non-covered loans past due less than 60 days, and 47% of legacy loans past due less than 60 days. Subsequent to year-end 2014, these three commercial loans were current and no longer past due. Accruing loans past due more than 60 days decreased $1 million from December 31, 2013 to December 31, 2014, and were 0.10% of total non-covered loans, a decrease of four basis points from December 31, 2013. Despite a $3 million, or 4%, increase in total non-accrual non-covered loans, non-accrual loans as a percent of total non-covered loans decreased 16 basis points to 0.76% at December 31, 2014.

Legacy loans past due decreased $1 million, or 1%, from December 31, 2013, which represented a decrease of 13 basis points of the total outstanding legacy loan balance. Legacy non-accrual loans as a percentage of total outstanding legacy loans decreased 17 basis points, while accruing loans past due increased four basis points to 0.31% of total legacy loans. Legacy commercial non-accrual loans decreased $14 million, or 59%, while legacy mortgage non-accrual loans increased $4 million and legacy consumer non-accrual loans increased $2 million since December 31, 2013. The increase in mortgage and consumer non-accrual loans was a result of the placement of past due consumer loans on non-accrual status during 2014 in response to their continued past due status. Legacy consumer non-accrual loans were 0.50% of legacy consumer loans at December 31, 2014 and 0.49% at December 31, 2013.

In the non-covered commercial loan portfolio, total accruing loans past due increased $2 million, or 13%, from December 31, 2013 and was a result of the limited number of larger commercial loans noted above. Total non-covered mortgage loans past due increased $2 million during 2014, with 88% due less than 90 days and 31% past due less than 60 days. At December 31, 2013, those percentages were 64.6% and 36.5%, respectively. Management is continually monitoring the past due status of these mortgage loans for indicators of overall asset quality issues.

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Covered Loans

The loans and foreclosed real estate that were acquired in the CSB, Orion, Century, and Sterling acquisitions in 2009 and 2010 are covered by loss share agreements between the FDIC and IBERIABANK, which afford IBERIABANK loss protection. As a result of the loss protection provided by the FDIC, the risk of loss on the acquired loans and foreclosed real estate can be significantly different from those assets not covered under the loss share agreements.

As described above, covered assets were recorded at their acquisition date fair values.

Although covered loans are not included in the Company’s nonperforming assets, in accordance with bank regulatory reporting standards, both acquired loans considered impaired at the time of acquisition and those performing at the time of acquisition that meet the Company’s definition of a nonperforming loan at each balance sheet date are discussed below. Included in the discussion are all covered loans that are contractually past due based on the number of days past due. Certain measures of the asset quality of covered loans are discussed below. Loan balances are reported before consideration of applied loan discounts, as these discounts were recorded based on the estimated cash flow of the total loan pool and not on a specific loan basis. The loss share agreements with the FDIC limit the Company’s exposure to loss during the loss claim period to no more than 20% of incurred losses for all covered loans and as little as 5% of incurred losses for certain loans. Therefore, balances discussed below are for general comparative purposes only and do not represent the Company’s risk of loss on covered assets.

TABLE 14—PAST DUE COVERED LOAN SEGREGATION

	December 31, 2014					December 31, 2013
(Dollars in thousands)	Amount		% of Outstanding Balance			Amount		% of Outstanding Balance
Accruing loans:
30-59 days past due	$	3,277		0.63	%	$	8,474		1.01	%
60-89 days past due		2,912		0.56			5,222		0.62
90-119 days past due		368		0.07			579		0.07
120 days past due or more		—		—			—		—
Total accruing loans		6,557		1.27			14,275		1.70
Non-accrual loans (1)		85,831		16.61			190,016		22.68
Total past due loans	$	92,388		17.88	%	$	204,291		24.38	%

⁽¹⁾  The covered loans balance represents the outstanding balance of loans that would otherwise meet the Company’s definition of non-accrual loans.

Covered loans past due at December 31, 2014 totaled $92 million before discounts, a decrease of $112 million, or 55%, from December 31, 2013. The decrease is consistent with not only the overall decrease in the covered loan portfolio, but also with the steady improvement in asset quality in the covered loan portfolio over time. Past due covered loans at the end of 2014 included $86 million in loans that would otherwise meet the Company’s definition of nonaccrual loans and $6 million in accruing loans past due of which 94% were past due less than 90 days. The indemnification agreements on covered assets include a provision for recapture of a portion of interest if the interest is included in total losses on the covered asset.

Of the $112 million decrease in covered loans past due, loans past due 30 to 89 days decreased $8 million, or 55%, while nonperforming loans (defined as accruing loans greater than 90 days past due and loans that meet the definition of nonaccrual loans) decreased $104 million, or 55%. These decreases were primarily a result of loan payments during the current year, but also include the movement of certain non-single family loans to non-covered acquired loans after the expiration of their loss sharing agreements in 2014.

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Of the $445 million in covered assets at December 31, 2014, $184 million lost loss share coverage as of January 1, 2015, while another $26 million will lose loss share coverage by December 31, 2015. The following table provides additional information on the covered assets losing loss share coverage as of January 1, 2015. When the coverage period ends, these assets will be included in asset quality information presented in Table 13 above as part of the non-covered acquired loans.

TABLE 15—COVERED ASSETS BY LOSS SHARE COVERAGE PERIOD

	Covered Assets
	Non-Single Family Residential Loans (Losing Loss Share Coverage as of January 1, 2015)			Non-Single Family Residential Loans (Losing Loss Share Coverage within 12 months)			Single Family Residential Loans (Losing Loss Share Coverage 10 years from Date of Acquisition)
(Dollars in thousands)
Loans, net	$	174,711		$	22,485		$	247,348
Other real estate owned		9,596			3,639			10,461
Allowance for loan losses		(29,771	)		(1,710	)		(13,283	)
Non-accrual loans	$	36,755		$	2,939		$	46,137
Foreclosed assets		825			—			—
Other real estate owned		8,771			3,639			10,462
Accruing loans more than 90 days past due		—			—			368
Nonperforming assets	$	46,351		$	6,578		$	56,967
Total past due loans	$	40,629		$	2,966		$	48,793
NPAs/(Loans + OREO)		25.15	%		25.18	%		22.10	%
(Past Dues & Nonaccruals)/Loans		23.25	%		13.19	%		19.73	%

Allowance for Credit Losses

The allowance for credit losses represents management’s best estimate of probable credit losses inherent at the balance sheet date. Determination of the allowance for credit losses involves a high degree of complexity and requires significant judgment. Several factors are taken into consideration in the determination of the overall allowance for credit losses, including a qualitative component. These factors include, but are not limited to, the overall risk profiles of the loan portfolios, net charge-off experience, the extent of impaired loans, the level of nonaccrual loans, the level of 90 days past due loans and the overall percentage level of the allowance. The Company also considers overall asset quality trends, changes in lending and risk management practices and procedures, trends in the nature and volume of the loan portfolio, including the existence and effect of any portfolio concentrations, changes in experience and depth of lending staff, the Company’s legal, regulatory and competitive environment, national and regional economic trends, and data availability and applicability that might impact the portfolio. See the “Application of Critical Accounting Policies and Estimates” section for more information.

During 2014, the Company did not substantively change any material aspect of its overall approach in the determination of the allowance for credit losses and there have been no material changes in assumptions or estimation techniques as compared to December 31, 2013. However, during the third quarter of 2013, the Company modified its methodology for estimating its allowance for credit losses on its legacy loan portfolio to incorporate practices, processes, and methodologies consistent with the guidance provided in the FRB’s inter-agency policy statement 2006 SR 06-17. The methodology was modified to segregate the RULC, previously included in the Company’s allowance for loan losses, into a separate liability on the Company’s consolidated balance sheets, and to enhance the previous methodology around loss migration.

Certain inherent, but unconfirmed losses are probable within the loan portfolio. The Company’s current methodology for determining the level of losses is based on historical loss rates, current credit grades, specific allocation and other qualitative adjustments. In a stable or deteriorating credit environment, heavy reliance on historical loss rates and the credit grade rating process results in model-derived required reserves that tend to slightly lag behind portfolio deterioration. Similar lags can occur in an improving credit environment whereby required reserves can lag slightly behind portfolio improvement. Given these model limitations, qualitative adjustment factors may be incremental or decremental to the quantitative model results.

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The manner in which the allowance for credit losses is determined is based on the accounting method applied to the underlying loans. The Company delineates between loans accounted for under the contractual yield method, primarily legacy loans, and loans accounted for as purchased impaired loans.

Legacy Loans

Legacy loans represent loans accounted for under the contractual yield method. The Company’s legacy loans include loans originated by the Company. See the “Application of Critical Accounting Policies and Estimates” section for more information.

Acquired Loans

Acquired loans, which include covered loans and certain non-covered loans, represent loans acquired by the Company that are accounted for in accordance with ASC 310-30. See the discussion above, as well as the “Application of Critical Accounting Policies and Estimates” for more information.

Loans acquired in business combinations were recorded at their acquisition date fair values, which were based on expected cash flows and included estimates of expected future credit losses. If the Company determines that losses arose after the acquisition date, the additional losses will be reflected as a provision for credit losses.

At December 31, 2014, the Company had an allowance for credit losses of $45 million to reserve for probable losses currently in the covered loan portfolio and $9 million to reserve for probable losses currently in the acquired loan portfolio that have arisen after the losses estimated at the respective acquisition dates. Based on facts and circumstances available, management of the Company believes that the allowance for credit losses was appropriate at December 31, 2014 to cover probable losses in the Company’s loan portfolio. However, future adjustments to the allowance may be necessary, and the results of operations could be adversely affected, if circumstances differ substantially from the assumptions used by management in determining the allowance for credit losses.

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The following tables set forth the activity in the Company’s allowance for credit losses.

TABLE 16—SUMMARY OF ACTIVITY IN THE ALLOWANCE FOR CREDIT LOSSES

(Dollars in thousands)	2014			2013			2012			2011			2010
Balance at beginning of period	$	143,074		$	251,603		$	193,761		$	136,100		$	55,768
Transfer of balance to OREO		(7,323	)		(28,126	)		(27,169	)		(17,143	)		—
Transfer of balance to the reserve for unfunded commitments		—			(9,828	)		—			—			—
Provision charged to operations		19,060			5,145			20,671			25,867			42,451
(Reversal of) Provision recorded through the FDIC loss share receivable		(4,260	)		(56,085	)		84,085			57,121			64,922
Charge-offs:
Commercial		(16,215	)		(19,220	)		(16,747	)		(9,200	)		(23,634	)
Residential Mortgage		(811	)		(518	)		(2,376	)		(244	)		(1,068	)
Consumer		(9,829	)		(6,743	)		(5,937	)		(6,715	)		(9,156	)
		(26,855	)		(26,481	)		(25,060	)		(16,159	)		(33,858	)
Recoveries:
Commercial		3,107			3,745			3,293			5,516			4,863
Residential Mortgage		248			765			38			170			77
Consumer		3,080			2,336			1,984			2,289			1,877
		6,435			6,846			5,315			7,975			6,817
Net charge-offs		(20,420	)		(19,635	)		(19,745	)		(8,184	)		(27,041	)
Allowance for loan losses at end of period		130,131			143,074			251,603			193,761			136,100
Balance at beginning of period		11,147			—			—			—			—
Transfer of balance from the allowance for loan losses		—			9,828			—			—			—
Provision for unfunded lending commitments		654			1,319			—			—			—
Reserve for unfunded lending commitments		11,801			11,147			—			—			—
Allowance for credit losses at end of period	$	141,932		$	154,221		$	251,603		$	193,761		$	136,100
Allowance for loan losses to nonperforming assets (1) (2)		129.39	%		87.54	%		88.3	%		96.4	%		89.9	%
Allowance for loan losses to total loans at end of period (2)		0.78			0.82			1.12			1.24			1.40
Net charge-offs to average loans (3)		0.07			0.05			0.07			0.13			0.47

⁽¹⁾ Nonperforming assets include accruing loans 90 days or more past due.

⁽²⁾  The allowance for loan losses in the calculation does not include either the allowance attributable to covered assets or covered loans.

⁽³⁾  Net charge-offs exclude charge-offs and recoveries on covered loans and average loans exclude covered loans.

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TABLE 17—ALLOCATION OF THE ALLOWANCE FOR CREDIT LOSSES

	2014						2013						2012						2011						2010
	Reserve %			% of Loans			Reserve %			% of Loans			Reserve %			% of Loans			Reserve %			% of Loans			Reserve %			% of Loans
Commercial		70	%		69	%		69	%		72	%		71	%		73	%		73	%		73	%		59	%		69	%
Mortgage		7			9			10			6			10			5			11			7			22			10
Consumer		23			22			21			22			19			22			16			20			19			21
Total allowance for credit losses		100	%		100	%		100	%		100	%		100	%		100	%		100	%		100	%		100	%		100	%

The allowance for credit losses was $142 million at December 31, 2014, or 1.24% of total loans, $12 million lower than at December 31, 2013. The allowance for credit losses as a percentage of loans was 1.62% at December 31, 2013.

The decrease in the allowance was primarily related to a decrease in reserves on the covered portfolio. The allowance for credit losses on the covered portion of the loan portfolio decreased $26 million primarily due to a change in expected cash flows on certain of the acquired loan pools during 2014. The reserve was adjusted during 2014 to cover the expected losses in these pools.

The allowance for credit losses on the legacy portfolio increased $9 million, or 12%, since December 31, 2013, primarily a result of $1.4 billion in legacy loan growth in 2014. The overall improvement in legacy asset quality over the past 12 months, evidenced by continued lower levels of past due loans, partially offset the additional allowance needed to reserve for legacy loan growth.

The non-covered acquired allowance for credit losses includes a reserve of $9 million for losses probable in those portfolios at December 31, 2014 above estimated expected credit losses at acquisition.

At December 31, 2014 and 2013, the allowance for loan losses covered nonperforming legacy loans 2.1 times and 1.5 times, respectively. Including acquired non-covered loans, the allowance for loan losses covered 66% of total past due and nonaccrual loans at both December 31, 2014 and 2013.

FDIC Loss Share Receivable

As part of the FDIC-assisted acquisitions in 2009 and 2010, the Company recorded a receivable from the FDIC, which represented the fair value of the expected reimbursable losses covered by the loss share agreements as of the acquisition dates. The FDIC loss share receivable decreased $93 million, or 57%, during 2014 due to amortization of $75 million, OREO cash flow improvements of $12 million, impairment due to expected OREO sales moving outside the loss share term of $5 million, and impairment recorded through the loan loss provision due to changes in the timing of estimated cash flows on covered loans of $4 million, which were partially offset by $3 million in net recoveries. See Note 8 to the consolidated financial statements for discussion of the reimbursable loss periods of the loss share agreements.

Based on improving economic trends, their impact on the amount and timing of expected future cash flows, and delays in the foreclosure process, the Company concluded that certain expected losses are probable of not being collected from the FDIC or the customer because such projected losses are anticipated to occur beyond the reimbursable periods of the loss share agreements. In both 2014 and 2013, management concluded that an impairment charge should be recognized in the consolidated financial statements. Therefore, the Company recognized a valuation allowance against the indemnification assets in the amount of $5 million in 2014 and $32 million in 2013 through a charge to net income.

Of the FDIC loss share receivables balance of $70 million at December 31, 2014, approximately $20 million is expected to be collected from the FDIC, $49 million, which represents improvements in cash flows expected to be collected from customers, is expected to be amortized over time, and less than $1 million is expected to be collected in conjunction with OREO transactions. For certain covered assets, loss share coverage expired on January 1, 2015. At December 31, 2014, the FDIC loss share receivables did not include any amounts related to these assets that are expected to be collected from the FDIC or OREO transactions. To the extent that loss share coverage ends prior to triggering events on covered assets that would enable the Company to collect these amounts from the FDIC or OREO transactions, future impairments would be required.

The Company may owe consideration previously received under indemnification agreements to the FDIC under the “clawback” provisions in three of these agreements. The clawback provisions generally stipulate that in the event of not meeting certain thresholds of loss, the Company is required to pay the FDIC a percentage as defined in the respective agreements. Cumulative losses to date under two of these agreements have exceeded the calculated loss amounts, which would result in clawback if not incurred. Previously, the sum of the historical and remaining projected losses under the remaining agreement was in excess of the clawback amount stated in that

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agreement. For the third agreement, the Company recorded a $0.8 million liability at December 31, 2013 to reserve for the amount of clawback consideration due to the FDIC based on cumulative losses to date. During 2014, based on its estimate of projected net losses, the Company concluded the clawback payment was no longer probable, and reversed the accrued liability through a reduction of non-interest expense in its consolidated statements of comprehensive income for the year ended December 31, 2014. Although no liability for clawback is recorded at December 31, 2014, the future performance of the remaining covered assets (namely improvements in the forms of recoveries and/or reduced losses) for each of the three agreements beyond each agreement’s respective collection period could require the Company to be subject to the clawback provisions for that agreement.

Refer to the “Other Assets” discussion below for additional amounts due from the FDIC related to loss share agreements.

Investment Securities

Investment securities increased by $185 million, or 9%, to $2.3 billion over the past year due to both acquired investment securities and open-market security purchases. Investment securities decreased to 14% of total assets at December 31, 2014 from 16% at December 31, 2013. Investment securities were 15% of average earnings assets in the current year and 16% in 2013. The following table shows the carrying values of securities by category as of December 31 for the years indicated.

TABLE 18—CARRYING VALUE OF SECURITIES

(Dollars in thousands)	2014				2013				2012				2011				2010
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	315,553	14	%	$	395,561	19	%	$	285,724	15	%	$	342,488	17	%	$	422,800	21	%
Obligations of state and political subdivisions		90,190	4			107,479	5			127,075	7			143,805	7			40,169	2
Mortgage-backed securities		1,751,615	77			1,432,278	68			1,330,656	68			1,317,374	66			1,263,869	63
Other securities		1,495	—			1,479	—			1,549	—			1,538	—			2,956	—
		2,158,853	95			1,936,797	92			1,745,004	90			1,805,205	90			1,729,794	86
Securities held to maturity:
U.S. Government-sponsored enterprise obligations		10,000	—			34,478	2			69,949	4			85,172	4			180,479	9
Obligations of state and political subdivisions		77,597	4			84,290	4			88,909	4			81,053	4			75,768	4
Mortgage-backed securities		29,363	1			35,341	2			46,204	2			26,539	2			33,773	1
		116,960	5			154,109	8			205,062	10			192,764	10			290,020	14
	$	2,275,813	100	%	$	2,090,906	100	%	$	1,950,066	100	%	$	1,997,969	100	%	$	2,019,814	100	%

All of the Company’s mortgage-backed securities are agency securities. The Company does not hold any Fannie Mae or Freddie Mac preferred stock, corporate equity, collateralized debt obligations, collateralized loan obligations, or structured investment vehicles, nor does it hold any private label collateralized mortgage obligations, sub-prime, Alt-A, or second lien elements in its investment portfolio. At December 31, 2014, the Company’s investment portfolio did not contain any securities that are directly backed by subprime or Alt-A mortgages.

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The following table summarizes activity in the Company’s investment securities portfolio during 2014 and 2013. There were no transfers of securities between investment categories during 2014.

TABLE 19—INVESTMENT PORTFOLIO ACTIVITY

(Dollars in thousands)	Available for Sale						Held to Maturity
	2014			2013			2014			2013
Balance at beginning of period	$	1,936,797		$	1,745,004		$	154,109		$	205,062
Purchases		703,179			1,026,290			—			5,901
Acquisitions		44,386			—			—			—
Sales, net of gains		(60,931	)		(42,400	)		—			—
Principal maturities, prepayments and calls, net of gains		(488,699	)		(709,977	)		(36,180	)		(55,649	)
Amortization of premiums and accretion of discounts		(12,827	)		(17,748	)		(969	)		(1,205	)
Unrealized gains (losses)		36,948			(64,372	)		—			—
Balance at end of period	$	2,158,853		$	1,936,797		$	116,960		$	154,109

Funds generated as a result of sales and prepayments are used to fund loan growth and purchase other securities. The Company continues to monitor market conditions and take advantage of market opportunities with appropriate risk and return elements.

The Company assesses the nature of the losses in its investment portfolio periodically to determine if there are losses that are deemed other-than-temporary. In its analysis of these securities, management considers numerous factors to determine whether there are instances where the amortized cost basis of the debt securities would not be fully recoverable, including, the length of time and extent to which the fair value of the securities was less than their amortized cost, whether adverse conditions were present in the operations, geographic area, or industry of the issuer, the payment structure of the security, including scheduled interest and principal payments, changes to the rating of the security by a rating agency, and subsequent recoveries or additional declines in fair value after the balance sheet date.

Management believes it has considered these factors, as well as all relevant information available, when determining the expected future cash flows of the securities in question. Based on its analysis, the Company concluded no declines in the market value of the Company’s investment securities are deemed to be other-than-temporary at December 31, 2014 and 2013. Note 5 to the consolidated financial statements provides further information on the Company’s investment securities.

Short-term Investments

Short-term investments result from excess funds invested overnight in interest-bearing deposit accounts at the FRB and the FHLB of Dallas. These balances fluctuate daily depending on the funding needs of the Company and earn interest at the current FHLB and Federal Reserve discount rate. The balance in interest-bearing deposits at other institutions of $296 million at December 31, 2014 increased $143 million, or 94%, from December 31, 2013. The primary cause was the Company’s increase in deposits over the past 12 months, offset partially from the use of available cash to purchase higher-yielding investment securities, fund loan growth, and pay down its long-term debt, all in an attempt to improve its net interest margin. The Company’s cash activity is further discussed in the “Liquidity” section below.

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Other Assets

The following table details other asset balances as of December 31:

TABLE 20—OTHER ASSETS COMPOSITION

											2014 vs. 2013
(Dollars in thousands)	2014		2013		2012		2011		2010		$ Change			% Change
Other Earning Assets
FHLB and FRB stock	$	74,130	$	53,773	$	46,216	$	60,155	$	57,280	$	20,357			38	%
Fed funds sold and financing transactions		—		—		4,875		—		9,038		—			—
Other interest-earning assets (1)		5,412		3,412		3,412		3,412		3,358		2,000			59
Total other earning assets		79,542		57,185		54,503		63,567		69,676		22,357			39
Non-Earning Assets
Premises and equipment		307,159		287,510		303,523		285,607		208,403		19,649			7
Bank-owned life insurance		122,573		104,203		100,556		96,876		72,536		18,370			18
Goodwill		517,526		401,872		401,872		369,811		234,228		115,654			29
Core deposit intangibles		19,595		14,622		19,122		24,021		22,975		4,973			34
Title plant and other intangible assets		7,511		7,439		7,660		7,911		6,722		72			1
Accrued interest receivable		37,696		32,143		32,183		36,006		34,250		5,553			17
Other real estate owned		53,947		99,173		121,536		125,046		69,218		(45,226	)		(46	)
Derivative market value		32,903		30,076		42,119		33,026		37,320		2,827			9
Investment in tax credit entities		139,326		132,487		137,508		120,247		114,751		6,839			5
Other non-earning assets		96,307		76,839		50,532		85,412		89,088		19,468			25
Total non-earning assets		1,334,543		1,186,364		1,216,611		1,183,963		889,491		148,179			12
Total other assets	$	1,414,085	$	1,243,549	$	1,271,114	$	1,247,530	$	959,167	$	170,536			14	%

⁽¹⁾ Other interest-earning assets are composed primarily of trust preferred common securities.

The $20 million increase in FHLB and FRB stock was the result of $9 million in acquired stock, as well as $11 million in net stock purchases during 2014.

Fed funds sold and financing transactions represent short-term excess liquidity, and the balance varies based on the daily liquidity requirements needed by the Company and its subsidiaries for loan growth and other operating activities. There were no fed funds sold or financing transactions at December 31, 2014 or 2013.

Premises and equipment increased $20 million as a result of $24 million in acquired property and equipment from Teche, First Private, and Trust One-Memphis. Current period depreciation expense recorded on the assets in service and former bank properties moved to OREO partially offset the acquired premises and equipment.

Bank-owned life insurance increased $18 million as a result of $15 million in acquired policies from Teche and income earned on the outstanding policies during the year.

Core deposit intangibles increased $5 million during the current year, the result of an additional $11 million in core deposit intangibles recorded as part of the Trust One-Memphis, Teche and First Private acquisitions, which was partially offset by amortization expense recorded during 2014.

Other real estate includes all real estate, other than bank premises used in bank operations, which is owned or controlled by the Company, including real estate acquired in settlement of loans and former bank premises no longer used. The $45 million decrease in OREO from December 31, 2013 was a result of the sale of OREO properties. Covered OREO properties at December 31, 2014 were $24 million, 62% lower than at the end of 2013. Non-covered OREO decreased $7 million, or 19%, and was primarily a result of the sales of non-covered OREO properties during 2014 outpacing increases from the acquisition of $2 million from Teche and Trust One-Memphis and the movement of $9 million in former bank properties to OREO.

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The increase in the market value of the Company’s derivatives was the result of both the change in value of existing derivatives from December 31, 2013 and an increase in derivative activity.

Investments in tax credit entities increased $7 million as a result of additional low-income housing tax credit investments totaling $10 million in 2014, partially offset by the amortization of tax credits as they are recognized in the Company’s income tax provision calculation.

The $20 million increase in other non-earning assets since December 31, 2013 was primarily the result of a $16 million increase in the Company’s net tax accounts as a result of excess tax payments made, as well as additional deferred tax assets arising from acquisitions. Also affecting other assets was a $3 million increase in deferred compensation assets held that are related to current year employee compensation deferrals.

FUNDING SOURCES

Deposits obtained from clients in its primary market areas are the Company’s principal source of funds for use in lending and other business purposes. The Company attracts local deposit accounts by offering a wide variety of products, competitive interest rates and convenient branch office locations and service hours. Increasing core deposits through acquisitions and the development of client relationships is a continuing focus of the Company. Short-term and long-term borrowings have become an important funding source as the Company has grown. Other funding sources include subordinated debt and shareholders’ equity. Refer to the “Liquidity” section below for further discussion of the Company’s funding sources. The following discussion highlights the major changes in the mix of deposits and other funding sources during 2014.

Deposits

The Company’s ability to attract and retain customer deposits is critical to the Company’s continued success. During 2014, total deposits increased $1.8 billion, or 17%, totaling $12.5 billion at December 31, 2014. On average, total deposits increased $936 million, or 9%, from 2013. Total non-interest-bearing deposits increased $619 million, or 24%, and interest-bearing deposits increased $1.2 billion, or 14%, from December 31, 2013. Acquired deposits of $1.1 billion from Teche, First Private, and Trust One-Memphis accounted for the majority of the increase from year-end, while $640 million, or 36% of the total growth from December 31, 2013, was a result of organic deposit growth.

The following table and chart set forth the composition of the Company’s deposits as of December 31:

TABLE 21—DEPOSIT COMPOSITION BY PRODUCT

																					2014 vs. 2013
(Dollars in thousands)	2014				2013				2012				2011				2010				$ Change		% Change
Non-interest-bearing deposits	$	3,195,430	26	%	$	2,575,939	24	%	$	1,967,662	18	%	$	1,485,058	16	%	$	878,768	11	%	$	619,491		24	%
NOW accounts		2,462,841	20			2,283,491	22			2,523,252	24			1,876,797	20			1,281,825	16			179,350		8	%
Money market accounts		4,168,504	33			3,779,581	35			3,738,480	35			3,049,151	33			2,660,702	34			388,923		10	%
Savings accounts		577,513	4			387,397	3			364,703	3			332,351	3			249,412	3			190,116		49	%
Certificates of deposit		2,116,237	17			1,710,592	16			2,154,180	20			2,545,656	28			2,844,399	36			405,645		24	%
Total deposits	$	12,520,525	100	%	$	10,737,000	100	%	$	10,748,277	100	%	$	9,289,013	100	%	$	7,915,106	100	%	$	1,783,525		17	%

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From a product perspective, interest-bearing core deposits increased $758 million, while time deposits increased $406 million. Certificates of deposit in denominations of $100,000 and over increased $174 million, or 19%, to $1.1 billion at December 31, 2014.

From a market perspective, total deposit growth was seen primarily in the Houston, Acadiana, Huntsville, and Birmingham markets. Houston’s customer deposits increased $126 million, or 14%, during 2014, while total deposits in the Acadiana market increased $148 million, or 7%, since the end of 2013. Huntsville, Alabama had year-to-date customer deposit growth of $58 million, or 92%. The Birmingham market had total customer deposit growth of $54 million, or 12%. Total deposit growth was offset, however, by deposit runoff in the Sarasota, Florida market ($39 million) and Southeast Florida ($17 million).

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The following table details large-denomination certificates of deposit by remaining maturity dates at December 31.

TABLE 22—REMAINING MATURITIES OF CDS $100,000 AND OVER

(Dollars in thousands)	2014				2013				2012				2011				2010
3 months or less	$	204,041	19	%	$	256,931	28	%	$	265,558	23	%	$	316,771	23	%	$	361,761	24	%
3 – 12 months		547,876	51			452,005	50			572,734	50			731,996	53			764,771	51
12 – 36 months		274,038	25			157,430	17			227,072	20			213,865	16			305,257	20
More than 36 months		54,844	5			39,976	5			81,151	7			114,999	8			82,245	5
Total CDs $100,000 and over	$	1,080,799	100	%	$	906,342	100	%	$	1,146,515	100	%	$	1,377,631	100	%	$	1,514,034	100	%

Short-term Borrowings

The Company may obtain advances from the FHLB of Dallas based upon its ownership of FHLB stock and certain pledges of its real estate loans and investment securities, provided certain standards related to the Company’s creditworthiness have been met. These advances are made pursuant to several credit programs, each of which has its own interest rate and range of maturities. The level of short-term borrowings can fluctuate significantly on a daily basis depending on funding needs and the source of funds chosen to satisfy those needs.

The Company also enters into repurchase agreements to facilitate customer transactions that are accounted for as secured borrowings. These transactions typically involve the receipt of deposits from customers that the Company collateralizes with its investment portfolio and have rates ranging from 0.09% to 0.80%. The following table details the average and ending balances of repurchase transactions as of and for the years ending December 31:

TABLE 23—REPURCHASE TRANSACTIONS

(Dollars in thousands)	2014		2013
Average balance	$	282,596	$	290,209
Ending balance		242,742		305,344

Total short-term borrowings increased $165 million, or 24%, from December 31, 2013, to $846 million at the end of 2014, a result of both acquired short-term borrowings from Teche and First Private and an additional $228 million in advances outstanding which were originated by the Company. The Company borrowed these funds in order to manage its liquidity as it funded loan growth in 2014. On an average basis, short-term borrowings increased $479 million, or 158%, from 2013. The increase in the average outstanding balance was largely due to the FHLB advances outstanding at December 31, 2014, as management’s decision has typically been to use available cash to reduce higher-cost funding sources and to fund loan growth.

Total short-term borrowings were 6% of total liabilities and 68% of total borrowings at December 31, 2014 compared to 6% and 71%, respectively, at December 31, 2013. On an average basis, short-term borrowings were 6% of total liabilities and 70% of total borrowings in 2014, compared to 3% and 49%, respectively, during 2013.

The weighted average rate paid on short-term borrowings was 0.17% during 2014, up one basis point compared to 0.16% in 2013.

For additional information on the Company’s short-term borrowings, see Note 15 of the consolidated financial statements.

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Long-term Debt

The Company’s long-term borrowings increased $123 million, or 44%, from December 31, 2013, a result of acquired Teche and First Private debt, offset partially by the scheduled repayment of a portion of the Company’s long-term FHLB advances during 2014. The Company also chose to enter into some long-term debt positions during 2014 to help manage the Bank’s interest rate risk position.

On average, long-term debt increased to $335 million in 2014, $18 million, or 6%, higher than for the twelve months of 2013. Average long-term debt was 3% of total liabilities during the current year, consistent with the average during 2013. On a period-end basis, long-term debt was 3% of total liabilities at December 31, 2014, an increase from 2% of total liabilities at December 31, 2013.

Long-term debt at December 31, 2014 included $211 million in fixed-rate advances from the FHLB of Dallas that cannot be prepaid without incurring substantial penalties. The remaining debt consisted of $112 million of the Company’s junior subordinated deferrable interest debentures, and $81 million in notes payable on investments in new market tax credit entities. The debentures are issued to statutory trusts that were funded by the issuance of floating rate capital securities of the trusts and qualify as Tier 1 Capital for regulatory purposes. Interest is payable quarterly and may be deferred at any time at the election of the Company for up to 20 consecutive quarterly periods. During any deferral period, the Company is subject to certain restrictions, including being prohibited from declaring dividends to its common shareholders. The securities are redeemable by the Company in whole or in part after five years, or earlier under certain circumstances. For additional information, see Note 16 of the consolidated financial statements.

CAPITAL RESOURCES

Federal regulations impose minimum regulatory capital requirements on all institutions with deposits insured by the FDIC. The FRB imposes similar capital regulations on bank holding companies. Compliance with bank and bank holding company regulatory capital requirements, which include leverage and risk-based capital guidelines, are monitored by the Company on an ongoing basis. Under the risk-based capital method, a risk weight is assigned to balance sheet and off-balance sheet items based on regulatory guidelines. At December 31, 2014 and 2013, the Company exceeded all required regulatory capital ratios, and the Company’s regulatory capital ratios and those of IBERIABANK were also in excess of the levels established for “well-capitalized” institutions, as shown in the following table and chart.

TABLE 24—REGULATORY CAPITAL RATIOS

Ratio	Entity	Well- Capitalized Minimums			December 31, 2014			December 31, 2013
					Actual			Actual
Tier 1 Leverage	IBERIABANK Corporation		5.00	%		9.36	%		9.70	%
	IBERIABANK		5.00			8.44			8.46
Tier 1 risk-based capital	IBERIABANK Corporation		6.00			11.18			11.57
	IBERIABANK		6.00			10.08			10.08
Total risk-based capital	IBERIABANK Corporation		10.00			12.31			12.82
	IBERIABANK		10.00			11.21			11.33

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The decrease in IBERIABANK Corporation’s risk-based capital ratio from December 31, 2013 was primarily the result of the Company’s acquisitions of Teche and First Private, as well as the deployment of excess liquidity into loans and other investments that carried a higher risk rating. Also affecting capital ratios at December 31, 2014 was a decrease in covered assets, which typically are assigned a lower risk rating.

At both December 31, 2014 and 2013, $109 million of the Company’s junior subordinated debt was included as Tier 1 capital in the Company’s risk-based capital ratios above. Due to the Company’s acquisitions of Teche and First Private during the second quarter of 2014, the Company will begin to phase out its junior subordinated debt from Tier 1 capital. Effective January 1, 2015, 50% of the Company’s junior subordinated debt will be excluded from Tier 1 capital. The remaining 50% will be excluded effective January 1, 2016. Once excluded from Tier 1 capital, the Company’s junior subordinated debt will be included as Tier 2 capital, a component of total risk-based capital above. Although the phase-out of the Company’s junior subordinated debt is not expected to impact its total risk-based capital ratio, the Company estimates that the phase-out would have lowered its consolidated Tier 1 leverage ratio and Tier 1 risk-based capital ratio at December 31, 2014 by 36 basis points and 54 basis points, respectively.

By the end of 2015, the Company’s loss-share protection on certain acquired non-single family loans associated with its FDIC-assisted transactions will expire, which will increase the risk weighting associated with these assets, generally from a weighting of 20% to 100%. The effect of this increase in risk weighting would have decreased the Company’s consolidated total risk-based capital ratio at December 31, 2014 by 12 basis points.

Although the impact of the phase-out of junior subordinated debt and the expiration of loss share coverage is expected to decrease certain capital ratios, the Company does not expect these events to impact its ability to meet minimum capital ratios to designate the Company or IBERIABANK as “well capitalized”.

Regulatory Developments

In July 2013, the U.S. banking regulatory agencies, including the FRB, approved a final rule to implement the revised capital adequacy standards of the BCBS or Basel III, and to address relevant provisions of the Dodd-Frank Act. The Company and IBERIABANK became subject to the new rules on January 1, 2015. Certain provisions of the new rules will be phased in from that date to January 1, 2019.

The final rules:

• Permit banking organizations that had less than $15 billion in total consolidated assets as of December 31, 2009, to include as Tier 1 capital trust preferred securities and cumulative perpetual preferred stock that were issued and included as Tier 1 capital prior to May 19, 2010, subject to a limit of 25% of Tier 1 capital elements, excluding any non-qualifying capital instruments and after all regulatory capital deductions and adjustments have been applied to Tier 1 capital,

• Establish new qualifying criteria for regulatory capital, including new limitations on the inclusion of deferred tax assets and mortgage servicing rights,

• Require a minimum ratio of common equity Tier 1, or CET1, capital to risk-weighted assets of 4.5%,

• Increase the minimum Tier 1 capital to risk-weighted assets ratio requirements from 4% to 6%,

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• Retain the minimum total capital to risk-weighted assets ratio requirement of 8%,

• Establish a minimum leverage ratio requirement of 4%,

• Retain the existing regulatory capital framework for 1-4 family residential mortgage exposures,

• Implement a new capital conservation buffer requirement for a banking organization to maintain a CET1 capital ratio more than 2.5% above the minimum CET1 capital, Tier 1 capital and total risk-based capital ratios in order to avoid limitations on capital distributions, including dividend payments, and certain discretionary bonus payments to executive officers. The capital conservation buffer requirement will be phased in beginning on January 1, 2016 at 0.625%, and will be fully phased in at 2.50% by January 1, 2019. A banking organization with a buffer of less than the required amount would be subject to increasingly stringent limitations on such distributions and payments as the buffer approaches zero. The new rule also generally prohibits a banking organization from making such distributions or payments during any quarter if its eligible retained income is negative and its capital conservation buffer ratio was 2.5% or less at the end of the previous quarter. The eligible retained income of a banking organization is defined as its net income for the four calendar quarters preceding the current calendar quarter, based on the organization’s quarterly regulatory reports, net of any distributions and associated tax effects not already reflected in net income,

• Increase capital requirements for past-due loans, high volatility commercial real estate exposures, and certain short-term commitments and securitization exposures,

• Expand the recognition of collateral and guarantors in determining risk-weighted assets, and

• Remove references to credit ratings consistent with the Dodd-Frank Act and establish due diligence requirements for securitization exposures.

Management continues to evaluate the provisions of the final rules and their expected impact on the Company and IBERIABANK. Management believes that at December 31, 2014, the Company and IBERIABANK would have met all new capital adequacy requirements on a fully phased-in basis if such requirements were then effective. There can be no assurances that the Basel III capital rules will not be revised before the effective date and expiration of the phase-in periods.

RESULTS OF OPERATIONS

The Company reported income available to common shareholders of $105 million, $65 million, and $76 million for the years ended December 31, 2014, 2013, and 2012, respectively. EPS on a diluted basis were $3.30 for 2014, $2.20 for 2013, and $2.59 for 2012.

In 2014, net interest income increased $70 million, or 18%, over 2013, as interest income increased $68 million, or 15%, and interest expense decreased $2 million, or 5%. Net interest income increased both as a result of an increase in the average earning asset yield and a decrease in the cost of interest-bearing liabilities. Additional customer loan volume in 2014 also contributed to the improvement in interest income from 2013. Income available to common shareholders was negatively impacted by a $14 million increase in the provision for loan losses, but was positively impacted by a $5 million increase in non-interest income, the drivers of which are discussed below in the “Non-interest Income” section of the discussion.

Income tax expense increased $19 million primarily due to higher income in 2014 when compared to 2013. During 2014, the Company also realized $3 million in tax benefits as a result of amending previously filed tax returns for federal and state tax credits not previously claimed.

The following discussion provides additional information on the Company’s operating results for the years ended December 31, 2014, 2013, and 2012, segregated by major income statement caption.

Net Interest Income

Net interest income is the difference between interest realized on earning assets and interest paid on interest-bearing liabilities and is also the driver of core earnings. As such, it is subject to constant scrutiny by management. The rate of return and relative risk associated with earning assets are weighed to determine the appropriateness and mix of earning assets. Additionally, the need for lower cost funding sources is weighed against relationships with clients and future growth opportunities. The Company’s net interest spread, which is the difference between the yields earned on average earning assets and the rates paid on average interest-bearing liabilities, was 3.40%, 3.26%, and 3.43%, during the years ended December 31, 2014, 2013, and 2012, respectively. The Company’s net interest margin on a taxable equivalent (“TE”) basis, which is net interest income (TE) as a percentage of average earning assets, was 3.51%, 3.38%, and 3.58%, respectively, for the same periods.

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The following table sets forth information regarding (i) the total dollar amount of interest income from earning assets and the resultant average yields; (ii) the total dollar amount of interest expense on interest-bearing liabilities and the resultant average rates; (iii) net interest income; (iv) net interest spread; and (v) net interest margin. Information is based on average daily balances during the indicated periods. Investment security market value adjustments and trade-date accounting adjustments are not considered to be earning assets and, as such, the net effect is included in non-earning assets.

TABLE 25—AVERAGE BALANCES, NET INTEREST INCOME AND INTEREST YIELDS / RATES

	2014									2013									2012
(Dollars in thousands)	Average Balance			Interest Income/ Expense			Yield/ Rate			Average Balance			Interest Income/ Expense			Yield/ Rate			Average Balance			Interest Income/ Expense			Yield/ Rate
Earning Assets:
Loans receivable:
Commercial loans	$	7,284,247		$	359,801			4.95	%	$	6,386,364		$	350,451			5.50	%	$	5,703,163		$	373,497			6.54	%
Mortgage loans		869,510			44,563			5.13	%		520,872			30,598			5.87	%		442,088			33,247			7.52	%
Consumer and other loans		2,310,339			122,342			5.30	%		1,954,766			107,887			5.52	%		1,700,427			107,192			6.30	%
Total loans (1) (2)		10,464,096			526,706			5.04	%		8,862,002			488,936			5.53	%		7,845,678			513,936			6.54	%
Loans held for sale		130,425			5,153			3.95	%		144,961			5,108			3.52	%		162,053			5,318			3.28	%
Investment securities		2,148,963			44,677			2.23	%		2,081,523			38,230			2.01	%		1,959,754			41,265			2.31	%
FDIC loss share receivable		120,567			(74,617	)		-61.04	%		266,856			(97,849	)		-36.16	%		485,270			(118,100	)		-23.94	%
Other earning assets		371,490			2,896			0.78	%		380,050			2,772			0.73	%		379,660			2,781			0.73	%
Total earning assets		13,235,541			504,815			3.85	%		11,735,392			437,197			3.78	%		10,832,415			445,200			4.16	%
Allowance for loan losses		(134,830	)								(184,217	)								(184,127	)
Nonearning assets		1,531,974									1,452,813									1,448,684
Total assets	$	14,632,685								$	13,003,988								$	12,096,972
Interest-bearing liabilities
Deposits:
NOW accounts	$	2,240,137			6,006			0.27	%	$	2,337,831			7,557			0.32	%	$	2,035,544			7,475			0.37	%
Savings and money market accounts		4,616,026			12,802			0.28	%		4,207,343			11,685			0.28	%		3,661,697			17,034			0.47	%
Certificates of deposit		1,889,858			14,282			0.76	%		1,964,702			16,604			0.85	%		2,302,081			24,855			1.08	%
Total interest-bearing deposits		8,746,021			33,090			0.38	%		8,509,876			35,846			0.42	%		7,999,322			49,364			0.62	%
Short-term borrowings		782,033			1,364			0.17	%		303,352			490			0.16	%		284,201			650			0.22	%
Long-term debt		335,211			10,250			3.02	%		316,775			10,617			3.31	%		431,133			13,436			3.07	%
Total interest-bearing liabilities		9,863,265			44,704			0.45	%		9,130,003			46,953			0.51	%		8,714,656			63,450			0.73	%
Noninterest-bearing demand deposits		2,916,509									2,216,959									1,718,849
Noninterest-bearing liabilities		144,861									129,833									149,950
Total liabilities		12,924,635									11,476,795									10,583,455
Shareholders’ equity		1,708,050									1,527,193									1,513,517
Total liabilities and shareholders’ equity	$	14,632,685								$	13,003,988								$	12,096,972
Net earning assets	$	3,372,276								$	2,605,389								$	2,117,759
Net interest spread				$	460,111			3.40	%				$	390,244			3.26	%				$	381,750			3.43	%
Net interest income (TE) / Net interest margin (TE)				$	468,720			3.51	%				$	399,696			3.38	%				$	391,409			3.58	%

(1) Total loans include nonaccrual loans for all periods presented.

(2) Interest income includes loan fees of $2 million, $3 million and $3 million for the years ended December 31, 2014, 2013 and 2012, respectively.

(3) Taxable equivalent yields are calculated using a marginal tax rate of 35%.

Net interest income increased $70 million to $460 million in 2014 when compared to 2013. The improvement in net interest income was the result of a $1.5 billion increase in average earning assets and a seven basis point improvement in earning asset yield, as well as a six basis point decrease in the average cost of interest-bearing liabilities. These improvements were offset by a $733 million, or 8%, increase in the average balance of interest-bearing liabilities. The average balance sheet growth over the past twelve months is primarily a result of growth in both earning assets and deposits.

Average loans made up 79% and 76% of average earning assets in 2014 and 2013, respectively. Average loans increased $1.6 billion, or 18%, from 2013 to 2014 as a result of loan growth in the non-covered loan portfolio. Investment securities made up 16% of average earning assets during the current year, compared to 18% during the same period of 2013.

Average interest-bearing deposits made up 89% of average interest-bearing liabilities during 2014, down from 93% during the twelve months of 2013. Average short-term borrowings and long-term debt made up 8% and 3% of average interest-bearing liabilities, respectively, in 2014, respectively, compared to 3% for both during 2013.

The seven basis point increase in yield on total earning assets between 2014 and 2013 was driven by higher yields on the Company’s investment portfolio, held for sale loans, and other earnings assets, but was partially offset by a two basis point decrease in loan yield, net of amortization of the Company’s FDIC loss share receivable (that results in a negative yield for this asset). As expected cash flow on the covered loan and OREO portfolios increases, the carrying value of the FDIC loss share receivable decreases, with the difference recorded as an adjustment to earnings.

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The following table sets forth information regarding average loan balances and average yields, segregated into the covered and non-covered portfolio, for the periods indicated. Information on the Company’s covered loan portfolio is presented both with and without the yield on the FDIC loss share receivable.

TABLE 26—AVERAGE LOAN BALANCE AND YIELDS

	Years Ended December 31
	2014					2013					2012
(Dollars in thousands)	Average Balance		Average Yield			Average Balance		Average Yield			Average Balance		Average Yield
Legacy loans	$	8,860,141		4.00	%	$	7,532,732		4.12	%	$	6,011,544		4.35	%
Acquired loans		1,020,134		6.98			425,830		8.09			639,940		6.36
Non-covered loans		9,880,275		4.31			7,958,562		4.41			6,651,484		4.63
Covered loans		583,821		16.50			903,440		15.34			1,194,194		17.22
FDIC loss share receivables		120,567		(61.04	)		266,856		(36.16	)		485,270		(23.94	)
Covered loans, net of FDIC loss share receivables		704,388		3.23			1,170,296		3.59			1,679,464		5.32
Total loans and FDIC loss share receivables	$	10,584,663		4.29	%	$	9,128,858		4.31	%	$	8,330,948		4.77	%

The following table displays the dollar amount of changes in interest income and interest expense for major components of earning assets and interest-bearing liabilities. The table distinguishes between (i) changes attributable to volume (changes in average volume between periods times the average yield/rate for the two periods), (ii) changes attributable to rate (changes in average rate between periods times the average volume for the two periods), and (iii) total increase (decrease). Changes attributable to both volume and rate are allocated ratably between the volume and rate categories.

TABLE 27—SUMMARY OF CHANGES IN NET INTEREST INCOME

	2014/2013									2013/2012
	Change Attributable To									Change Attributable To
(Dollars in thousands)	Volume			Rate			Net Increase (Decrease)			Volume			Rate			Net Increase (Decrease)
Earning assets:
Loans receivable:
Commercial loans (TE)	$	48,269		$	(38,919	)	$	9,350		$	41,070		$	(64,116	)	$	(23,046	)
Mortgage loans		18,286			(4,321	)		13,965			5,344			(7,993	)		(2,649	)
Consumer and other loans		18,566			(4,111	)		14,455			13,828			(13,133	)		695
Loans held for sale		(540	)		585			45			(585	)		375			(210	)
Investment securities (TE)		773			5,674			6,447			1,926			(4,961	)		(3,035	)
FDIC loss share receivable		70,004			(46,772	)		23,232			66,141			(45,890	)		20,251
Other earning assets		767			(643	)		124			(392	)		383			(9	)
Net change in income on earning assets		156,125			(88,507	)		67,618			127,332			(135,335	)		(8,003	)
Interest-bearing liabilities:
Deposits:
NOW accounts		(305	)		(1,246	)		(1,551	)		1,037			(955	)		82
Savings and money market accounts		1,821			(704	)		1,117			1,875			(7,224	)		(5,349	)
Certificates of deposit		(615	)		(1,707	)		(2,322	)		(3,324	)		(4,927	)		(8,251	)
Borrowings		1,523			(1,016	)		507			(3,756	)		777			(2,979	)
Net change in expense on interest-bearing liabilities		2,424			(4,673	)		(2,249	)		(4,168	)		(12,329	)		(16,497	)
Change in net interest spread	$	153,701		$	(83,834	)	$	69,867		$	131,500		$	(123,006	)	$	8,494

Interest income includes income earned on interest-earning assets as well as applicable loan fees earned. Interest income that would have been earned on nonaccrual loans had they been on accrual status is not included in the data reported above.

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For the year ended December 31, 2014, earning asset volume, both for acquired earnings assets and organic growth, drove the $68 million increase in interest income. Average loan balances increased $1.6 billion, 18%, over 2013 and can be attributed to the non-covered loan growth, as well as loans acquired from Trust One, Teche, and First Private. Covered loan yields, net of amortization, decreased 36 basis points during the current year. Interest income was also impacted in the current year by a ten basis point decrease in the yield on the Company’s non-covered loan portfolio.

In addition to loan volume increases, interest income growth was also a result of both a 22 basis point increase in the yield on investment securities and an increase in average investment securities of $67 million, or 3%, between 2013 and 2014.

Driven by a decrease of six basis points in the rate paid on interest-bearing liabilities during the current year, interest expense decreased $2 million, or 5%, from 2013. Despite an increase of $236 million in average interest-bearing deposits (a result of both acquired deposits and organic deposit growth), interest expense on deposits decreased 8%, or $3 million, from 2013, as the average rate paid on these deposits decreased to 0.38% for the twelve months of 2014, a four basis point decline. Higher-yielding time deposits across many markets either matured or were repriced during 2014, driving the expense and rate decreases. Interest expense on the Company’s short-term and long-term borrowings, however, increased from 2013, due to a $479 million increase in average short-term borrowings and an $18 million increase in average long-term borrowings offset by a 29 basis point decrease in the rate paid on long-term debt.

Between 2012 and 2013, the decrease in yield on total earning assets was driven by lower yields on the Company’s loan and investment security portfolios, as well as a higher rate of amortization of the Company’s FDIC loss share receivable.

For the year ended December 31, 2013, the decrease in the rates earned on the Company’s assets drove the $8 million decrease in interest income, but average balance increases in the largest components of earning assets partially offset these rate decreases. Average loan balances increased $1.0 billion, or 13%, over 2012 and was attributable to the non-covered loan growth since December 31, 2012. Covered loan yields net of amortization decreased 173 basis points during 2013. Interest income was also impacted by a decrease in the yield on the Company’s non-covered loan portfolio from 2012 to 2013 of 22 basis points to 4.41%. The total yield of the loan portfolio when including the loss share receivable was 4.31% in 2013, 46 basis points lower than in 2012, which offset the income earned on loan volume increases over 2012.

Interest income between 2012 and 2013 was also impacted by a 30 basis point decrease in the yield on investment securities. Average year-to-date investment securities increased $122 million between 2012 and 2013, partially offsetting the effect the yield decline had on interest income.

Interest expense in 2013 decreased $16 million, or 26%, from 2012. Despite an increase of $511 million in average interest-bearing deposits, interest expense on deposits decreased 27%, or $14 million, from 2012, as the average rate paid on these deposits decreased to 0.42% for the twelve months of 2013, a 20 basis point decline from 2012. Similar to 2014, higher-yielding time deposits across many markets either matured or were repriced during 2013, driving the expense and rate decreases. In 2013, interest expense on the Company’s short-term borrowings and long-term debt also decreased from 2012. Short term borrowings increased $19 million on average, offset by a six basis point decline in the rate paid. Average long-term debt decreased $114 million, however, the rate paid increased by 24 basis points.

Provision for Loan Losses

Management of the Company assesses the allowance for credit losses monthly and will make provisions for credit losses as deemed appropriate in order to maintain the appropriateness of the allowance for credit losses. Increases in the allowance for credit losses are achieved through provisions for credit losses that are charged against income. Adjustments to the allowance may also result from credit quality changes associated with acquired loans.

On a consolidated basis, the Company recorded a provision for loan losses of $19 million for the year ended December 31, 2014, a $14 million increase from the provision recorded for the same period of 2013. The Company also recorded a provision for unfunded lending commitments of $1 million during the current year, included in “Credit and other loan-related expense” in the Company’s consolidated statement of comprehensive income. As a result, the Company’s total provision for credit losses was $20 million in 2014, $13 million, or 205%, above the provision recorded in 2013. The Company’s total provision for 2014 included provision for changes in expected cash flows on the acquired loan portfolios (covered and non-covered) of $5 million and a $14 million provision recorded on legacy loans, based primarily on loan growth. The total provision was limited in 2014 by an improvement in legacy portfolio asset quality over the past 12 months, as demonstrated by a decrease in non-accrual loans and low multi-year net charge-off trends relative to historical periods.

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Total non-covered loans past due, including nonaccrual loans, totaled $130 million at December 31, 2014, or 118 basis points of non-covered loans, a decrease of seven basis points from December 31, 2013. On the same basis, legacy loans past due were 0.67% of total legacy loans at December 31, 2014, an improvement of 13 basis points from December 31, 2013.

Net charge-offs on the legacy portfolio were $5 million year-to-date, for a net charge-off percentage of 0.06%, relatively flat with 2013. The net charge-offs in 2014 were a result of $11 million in charge-offs and $6 million in recoveries.

The Company believes the allowance was appropriate at December 31, 2014 and 2013 to cover probable losses in the loan portfolio. The allowance for loan losses as a percentage of outstanding loans, net of unearned income, decreased 37 basis points from 1.51% at December 31, 2013 to 1.14% at December 31, 2014.

The allowance for loan losses for the legacy portfolio was 0.79% of legacy loans at December 31, 2014 and 0.81% at December 31, 2013. On the same basis, the Company’s allowance for loan losses to total nonperforming legacy loans at December 31, 2014 was 213% compared to 150% at 2013.

Non-interest Income

The Company’s operating results for the year ended December 31, 2014 included non-interest income of $174 million compared to $169 million and $176 million for the same periods of 2013 and 2012, respectively. The increase in non-interest income from 2013 was primarily a result of an increase in service charges on deposit accounts, ATM/debit card fee income, BOLI income and broker commissions. Non-interest income growth has been a management focus in response to a challenging interest rate environment. As a result, the Company has continued to increase its investments in its wealth management, trust, and brokerage businesses in order to improve its non-interest income. Non-interest income as a percentage of total gross revenue (defined as total interest and non-interest income) in 2014 was 26% compared to 28% of total gross revenue in the prior year. Excluding mortgage income, other non-interest income for the year ended December 31, 2014 increased to 18% of total gross revenue from 17% for the same period of 2013.

The following table illustrates the primary components of non-interest income.

TABLE 28—NON-INTEREST INCOME

							2014 vs. 2013						2013 vs. 2012
(Dollars in thousands)	2014		2013		2012		$ Change			% Change			$ Change			% Change
Service charges on deposit accounts	$	35,573	$	28,871	$	26,852	$	6,702			23	%	$	2,019			8	%
Mortgage income		51,797		64,197		78,053		(12,400	)		(19	)		(13,856	)		(18	)
Title revenue		20,492		20,526		20,987		(34	)		—			(461	)		(2	)
ATM/debit card fee income		12,023		9,510		8,978		2,513			26			532			6
Income from bank-owned life insurance		5,473		3,647		3,680		1,826			50			(33	)		(1	)
Gain on sale of available for sale investments		771		2,277		3,739		(1,506	)		(66	)		(1,462	)		(39	)
Broker commission income		18,783		16,333		13,446		2,450			15			2,887			21
Trust income		6,019		5,536		4,330		483			9			1,206			28
Credit card income		9,718		6,298		4,833		3,420			54			1,465			30
Other income		12,979		11,763		11,099		1,216			10			664			6
	$	173,628	$	168,958	$	175,997	$	4,670			3	%	$	(7,040	)		(4	)%

Service charges on deposit accounts increased $7 million in 2014 over the prior year and $2 million between 2012 and 2013 due primarily to an increase in service charge fees and NSF charges. Customers increased as a result of the Trust One, Teche and First Private acquisitions in 2014.

In 2014, IMC sales volume slowed, which resulted in a $12 million decrease in mortgage income from the twelve months ended December 31, 2013. Sales proceeds decreased $604 million, or 26%, while derivative valuation adjustments were $6 million lower than the year ended December 31, 2013. Between 2013 and 2012, the volume of sales decreased $68 million, or 3%, along with lower margins on those sales of mortgage loans.

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Other fluctuations in non-interest income included increases from ATM/debit card fee income, brokerage commissions, BOLI income and credit card income offset partially by a decrease in the gain on available for sale investments.

Non-interest Expense

The Company’s results for 2014 included non-interest expenses of $474 million, which were $1 million higher than non-interest expenses in 2013. Ongoing attention to expense control is part of the Company’s corporate culture. However, the Company’s continued focus on growth through acquisitions, product expansion, and operational investments have caused related increases in several components of non-interest expense. The Company currently operates 280 combined offices, an increase of 13 offices from December 31, 2013 after adjusting for closed or consolidated branches and offices.

In the current year, the increase in non-interest expenses over 2013 was primarily a result of direct merger-related expenses and expense increases as a result of the Company’s three acquisitions in 2014. Excluding merger-related and other non-operating expenses (see Table 4), non-interest expense would have increased $17 million, or 4%, an increase more representative of the Company’s growth over the past 12 months. For the year, the Company’s efficiency ratio was 74.9%, but excluding non-operating income and expenses, the Company’s operating efficiency ratio would have been 69.4%, compared to 74.6% in 2013.

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The following table illustrates the primary components of non-interest expense.

TABLE 29—NON-INTEREST EXPENSE

							2014 vs. 2013						2013 vs. 2012
(Dollars in thousands)	2014		2013		2012		$ Change			% Change			$ Change			% Change
Salaries and employee benefits	$	259,086	$	244,981	$	233,777	$	14,105			6	%	$	11,204			5	%
Net occupancy and equipment		59,571		58,037		54,672		1,534			3			3,365			6
Communication and delivery		12,029		12,024		12,671		5			—			(647	)		(5	)
Marketing and business development		11,707		10,143		12,546		1,564			15			(2,403	)		(19	)
Data processing		27,249		17,853		15,590		9,396			53			2,263			15
Amortization of acquisition intangibles		5,807		4,720		5,150		1,087			23			(430	)		(8	)
Professional services		18,975		18,217		21,095		758			4			(2,878	)		(14	)
Costs of OREO, net		2,748		1,943		6,352		805			41			(4,409	)		(69	)
Credit and other loan-related expense		13,692		15,931		18,095		(2,239	)		(14	)		(2,164	)		(12	)
Insurance		14,359		11,272		10,771		3,087			27			501			5
Travel and entertainment		9,033		8,126		9,563		907			11			(1,437	)		(15	)
Impairment of FDIC loss share receivables and other long-lived assets		6,437		37,893		2,902		(31,456	)		(83	)		34,991			1,206
Other expenses		33,786		31,945		29,001		1,841			6			2,944			10
	$	474,479	$	473,085	$	432,185	$	1,394			—	%	$	40,900			9	%

Salaries and employee benefits increased $14 million in 2014 when compared to 2013, primarily the result of increased staffing due to the growth of the Company, specifically from the three completed acquisitions during the year. The Company had 2,757 full-time equivalent employees at the end of 2014, an increase of 181, or 7%, from the end of 2013. During 2013, the Company increased revenue-producing positions both at IBERIABANK and at its mortgage origination subsidiary. Expenses for 2013 include the full year impact of personnel from Florida Gulf and the Company’s new branches for a portion of the year. Full-time equivalent employees decreased to 2,576 at the end of 2013, despite the $11 million increase between periods.

Net occupancy and equipment expenses were up $2 million from 2013, primarily due to merger-related expenses in 2014, as the Company incurred lease termination, signage, and other expenses directly related to the Company’s three acquisitions in the current year. Occupancy and equipment expenses also include repairs and maintenance on branches, utilities, rentals and property taxes. Repairs and maintenance expenses decreased $1 million in the current year, but were partially offset by a slight increase in net rental expense.

Between 2012 and 2013, occupancy and equipment expenses increased $3 million, or 6%, primarily from an increase in depreciation expense, the result of additional branches opened and the Florida Gulf branches, but also included accelerated depreciation on the Company’s branches that were closed in 2013. Repairs and maintenance expenses increased $3 million between periods, but were offset by a decrease in net rental expense, the result of $2 million in lower equipment rental expenses.

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Due to the growth of the Company over the past 12 months, professional services expense in 2014 was $1 million higher than in 2013. The continued expansion of the size and breadth of the Company’s operations has typically required additional expenditures for legal services, consulting engagements, exam and supervisory review, and audit services. In 2014, the Company incurred $3 million in merger-related professional services expense, including legal, audit, and consulting expenses. Excluding merger-related expenses, total professional services would have decreased $2 million, or 12%, as consulting expenses decreased $ 2 million, or 34%, from 2013. The Company engaged consultants in 2013 and 2012 to address risk mitigation and improve the operational efficiency of the Company in an effort to improve various Company and business-line specific processes. The Company began to see the benefits of these improvements in 2013 and 2014 and expects to see additional improvements in future periods.

Professional services expense in 2013 was $3 million lower than in 2012. Legal expenses decreased $2 million between periods, driven by lower settlement and litigation expenses and a reduction in merger-related expenses, while consulting and other professional services decreased $1 million.

Insurance expenses increased $3 million from 2013 to 2014, which was a result of higher deposit insurance in the current period. The increase in deposit insurance was a result of a larger deposit base through organic growth and acquired deposits, as total average deposits increased 9% in 2014. From 2012 to 2013, insurance expenses increased $1 million, also a result of additional deposit insurance costs as the Company’s average deposit base grew 10%.

Other non-interest expenses in 2014 included increases in almost all other categories when compared to 2013, which is consistent with growth in the Company’s customer base and footprint.

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Income Taxes

For the years ended December 31, 2014, 2013, and 2012, the Company recorded income tax expense of $35 million, $16 million, and $28 million, respectively, which resulted in an effective income tax rate of 24.8% in 2014, 19.6% in 2013, and 27.2% in 2012.

The difference between the effective tax rate and the statutory federal and state tax rates primarily relates to items that are non-taxable or non-deductible, primarily the effect of tax-exempt income, the non-deductibility of a portion of the amortization recorded on acquisition intangibles, and various tax credits. In the current year, the benefits of tax-exempt income and tax credits on the Company’s effective tax rate were more than offset by a $59 million increase in income before income tax expense.

LIQUIDITY AND OTHER OFF-BALANCE SHEET ACTIVITIES

Liquidity refers to the Company’s ability to generate sufficient cash flows to support its operations and to meet its obligations, including the withdrawal of deposits by customers, commitments to originate loans, and its ability to repay its borrowings and other liabilities. Liquidity risk is the risk to earnings or capital resulting from the Company’s inability to fulfill its obligations as they become due. Liquidity risk also develops from the Company’s failure to timely recognize or address changes in market conditions that affect the ability to liquidate assets in a timely manner or to obtain adequate funding to continue to operate on a profitable basis.

The primary sources of funds for the Company are deposits and borrowings. Other sources of funds include repayments and maturities of loans and investment securities, securities sold under agreements to repurchase, and, to a lesser extent, off-balance sheet borrowing needs. Certificates of deposit scheduled to mature in one year or less at December 31, 2014 totaled $1.3 billion. Based on past experience, management believes that a significant portion of maturing deposits will remain with the Company. Additionally, the majority of the investment securities portfolio is classified as available-for-sale, which provides the ability to liquidate unencumbered securities as needed. Of the $2.3 billion in the investment securities portfolio, $894.1 million is unencumbered and $1.4 billion has been pledged to support repurchase transactions, public funds deposits and certain long-term borrowings. Due to the relatively short implied duration of the investment securities portfolio, the Company has historically experienced significant cash inflows on a regular basis. Securities cash flows are highly dependent on prepayment speeds and could change materially as economic or market conditions change. See Notes 14, 15 and 16 to the consolidated financial statements for additional discussion related to the Company’s funding requirements.

Scheduled cash flows from the amortization and maturities of loans and securities are relatively predictable sources of funds. Conversely, deposit flows, prepayments of loan and investment securities, and draws on customer letters and lines of credit are greatly influenced by general interest rates, economic conditions, competition, and customer demand. The FHLB of Dallas provides an additional source of liquidity to make funds available for general requirements and also to assist with the variability of less predictable funding sources. At December 31, 2014, the Company had $814 million of outstanding FHLB advances, $603 million of which was short-term and $211 million was long-term. Additional FHLB advances available at December 31, 2014 amounted to $2.8 billion. At December 31, 2014, the Company also had a $25 million one-year line of credit available with an unaffiliated bank. The Company and IBERIABANK also have various funding arrangements with commercial banks providing up to $130 million in the form of federal funds and other lines of credit. At December 31, 2014, there were no balances outstanding on these lines and all of the funding was available to the Company.

Liquidity management is both a daily and long-term function of business management. The Company manages its liquidity with the objective of maintaining sufficient funds to respond to the predicted needs of depositors and borrowers and to take advantage of investments in earning assets and other earnings enhancement opportunities. Excess liquidity is generally invested in short-term investments such as overnight deposits. On a longer-term basis, the Company maintains a strategy of investing in various lending and investment security products. The Company uses its sources of funds primarily to fund loan commitments and meet its ongoing commitments associated with its operations. Based on its available cash at December 31, 2014 and current deposit modeling, the Company believes it has adequate liquidity to fund ongoing operations. The Company has adequate availability of funds from deposits, borrowings, repayments and maturities of loans and investment securities to provide the Company additional working capital if needed.

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In the normal course of business, the Company is a party to a number of activities that contain credit, market and operational risk that are not reflected in whole or in part in the Company’s consolidated financial statements. Such activities include traditional off-balance sheet credit-related financial instruments, commitments under operating leases, and long-term debt. The Company provides customers with off-balance sheet credit support through loan commitments, lines of credit, and standby letters of credit. Many of the commitments are expected to expire unused or be only partially used; therefore, the total amount of commitments does not necessarily represent future cash requirements. Based on its available liquidity and available borrowing capacity, the Company anticipates it will continue to have sufficient funds to meet its current commitments. At December 31, 2014, the Company’s unfunded loan commitments outstanding totaled $161 million. At the same date, unused lines of credit, including credit card lines, amounted to $4.0 billion, as shown in the following table.

TABLE 30—COMMITMENT EXPIRATION PER PERIOD

(Dollars in thousands)	Less than 1 year		1—3 Years		3—5 Years		Over 5 Years		Total
Unused lines of credit	$	1,983,620	$	1,002,707	$	886,545	$	135,082	$	4,007,954
Unfunded loan commitments		161,350		—		—		—		161,350
Standby letters of credit		95,434		19,909		19,232		307		134,882
	$	2,240,404	$	1,022,616	$	905,777	$	135,389	$	4,304,186

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The Company has entered into a number of long-term arrangements to support the ongoing activities of the Company. The required payments under such leasing and other debt commitments at December 31, 2014 are shown in the following table.

TABLE 31—CONTRACTUAL OBLIGATIONS AND OTHER DEBT COMMITMENTS

(Dollars in thousands)	2015		2016		2017		2018		2019		2020 and After		Total
Operating leases	$	11,541	$	9,878	$	8,153	$	7,333	$	6,214	$	31,860	$	74,979
Certificates of deposit		1,297,125		493,944		171,884		57,580		49,967		45,737		2,116,237
Short-term borrowings		845,742		—		—		—		—		—		845,742
Long-term debt		6,941		41,916		101,321		20,741		8,696		223,639		403,254
	$	2,161,349	$	545,738	$	281,358	$	85,654	$	64,877	$	301,236	$	3,440,212

ASSET/LIABILITY MANAGEMENT, MARKET RISK AND COUNTERPARTY CREDIT RISK

The principal objective of the Company’s asset and liability management function is to evaluate the interest rate risk included in certain balance sheet accounts, determine the appropriate level of risk given the Company’s business focus, operating environment, capital and liquidity requirements and performance objectives, establish prudent asset concentration guidelines and manage the risk consistent with Board approved guidelines. Through such management, the Company seeks to reduce the vulnerability of its operations to changes in interest rates. The Company’s actions in this regard are taken under the guidance of the Asset and Liability Committee. The Asset and Liability Committee normally meets monthly to review, among other things, the sensitivity of the Company’s assets and liabilities to interest rate changes, local and national market conditions and interest rates. In connection therewith, the Asset and Liability Committee generally reviews the Company’s liquidity, cash flow needs, maturities of investments, deposits, borrowings and capital position.

The objective of interest rate risk management is to control the effects that interest rate fluctuations have on net interest income and on the net present value of the Company’s earning assets and interest-bearing liabilities. Management and the Board are responsible for managing interest rate risk and employing risk management policies that monitor and limit this exposure. Interest rate risk is measured using net interest income simulation and asset/liability net present value sensitivity analyses. The Company uses financial modeling to measure the impact of changes in interest rates on the net interest margin and predict market risk. Estimates are based upon numerous assumptions including the nature and timing of interest rate levels including yield curve shape, prepayments on loans and securities, deposit decay rates, pricing decisions on loans and deposits, reinvestment/replacement of asset and liability cash flows and others. These analyses provide a range of potential impacts on net interest income and portfolio equity caused by interest rate movements.

Included in the modeling are instantaneous parallel rate shift scenarios, which are utilized to establish exposure limits. These scenarios are known as “rate shocks” because all rates are modeled to change instantaneously by the indicated shock amount, rather than a gradual rate shift over a period of time that has traditionally been more realistic.

The Company’s interest rate risk model indicated that the Company was asset sensitive in terms of interest rate sensitivity. Based on the Company’s interest rate risk model at December 31, 2014, the table below illustrates the impact of an immediate and sustained 100 and 200 basis point increase or decrease in interest rates on net interest income.

TABLE 32—CHANGE IN NET INTEREST INCOME FROM INTEREST RATE CHANGES

Shift in Interest Rates (in bps)	% Change in Projected Net Interest Income
+ 200	9.1%
+ 100	4.5%
- 100	(2.0)%
- 200	(4.2)%

The influence of using the forward curve as of December 31, 2014 as a basis for projecting the interest rate environment would approximate a 1.1% increase in net interest income. The computations of interest rate risk shown above do not necessarily include certain actions that management may undertake to manage this risk in response to anticipated changes in interest rates and other factors.

The interest rate environment is primarily a function of the monetary policy of the FRB. The principal tools of the FRB for implementing monetary policy are open market operations, or the purchases and sales of U.S. Treasury and federal agency securities, as well as the

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establishment of a short-term target rate. The FRB’s objective for open market operations has varied over the years, but the focus has gradually shifted toward attaining a specified level of the federal funds rate to achieve the long-run goals of price stability and sustainable economic growth. The federal funds rate is the basis for overnight funding and drives the short end of the yield curve. Longer maturities are influenced by the market’s expectations for economic growth and inflation, but can also be influenced by FRB purchases and sales and expectations of monetary policy going forward. In response to growing concerns about the banking industry and customer liquidity, the federal funds rate decreased to a new all-time low of 0.25% at the end of 2008. The federal funds rate has remained at 0.25% throughout 2014 and may remain at that rate through at least 2015. The Company’s commercial loan portfolio is also impacted by fluctuations in the level of the LIBOR, as a large portion of this portfolio reprices based on this index. The decrease in the federal funds, LIBOR, and U.S. Treasury rates have resulted in compressed net interest margin for the Company, as assets have repriced more quickly than the Company’s liabilities. Although management believes that the Company is not significantly affected by changes in interest rates over an extended period of time, any continued flattening of the yield curve will exert downward pressure on the net interest margin and net interest income. The table below presents the Company’s anticipated repricing of loans and investment securities over the next four quarters.

TABLE 33—REPRICING OF CERTAIN EARNING ASSETS

(Dollars in thousands)	1Q 2015		2Q 2015		3Q 2015		4Q 2015		Total less than one year
Investment securities	$	68,525	$	78,497	$	76,702	$	76,364	$	300,088
Covered loans		190,224		64,152		43,210		53,817		351,403
Non-covered loans:
Fixed rate loans		328,512		301,310		307,608		281,710		1,219,140
Variable rate loans		5,140,420		47,941		33,869		34,881		5,257,111
Total non-covered loans		5,468,932		349,251		341,477		316,591		6,476,251
Total loans		5,659,156		413,403		384,687		370,408		6,827,654
	$	5,727,681	$	491,900	$	461,389	$	446,772	$	7,127,742

Note: Amounts exclude the repricing of assets from prior periods, as well as nonaccrual loans and market value adjustments.

As part of its asset/liability management strategy, the Company has emphasized the origination of commercial and consumer loans, which typically have shorter terms than residential mortgage loans as well as adjustable or variable rates of interest. The majority of fixed-rate, long-term residential loans are sold in the secondary market to avoid assumption of the interest rate risk associated with longer duration assets in the current low rate environment. As of December 31, 2014, $5.8 billion, or 51%, of the Company’s total loan portfolio had adjustable interest rates. IBERIABANK had no significant concentration to any single borrower or industry segment at December 31, 2014.

The Company’s strategy with respect to liabilities in recent periods has been to emphasize transaction accounts, particularly non-interest or low interest-bearing transaction accounts, which are significantly less sensitive to changes in interest rates. At December 31, 2014, 83% of the Company’s deposits were in transaction and limited-transaction accounts, compared to 84% at December 31, 2013. Non-interest-bearing transaction accounts were 26% of total deposits at December 31, 2013, compared to 24% of total deposits at December 31, 2013.

Much of the liquidity increase experienced in the past several years has been due to a significant increase in non-interest-bearing demand deposits. The behavior of non-interest-bearing deposits and other types of demand deposits is one of the most important assumptions used in determining the interest rate and liquidity risk positions. A loss of these deposits in the future would reduce the asset sensitivity of the Company’s balance sheet as interest-bearing funds would most likely be increased to offset the loss of this favorable funding source.

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The table below presents the Company’s anticipated repricing of liabilities over the next four quarters.

TABLE 34—REPRICING OF LIABILITIES

(Dollars in thousands)	1Q 2015		2Q 2015		3Q 2015		4Q 2015		Total less than one year
Time deposits	$	674,633		362,422		320,690		264,776	$	1,622,521
Short-term borrowings		525,742		290,000		20,000		10,000		845,742
Long-term debt		122,296		10,519		3,675		2,279		138,769
	$	1,322,671	$	662,941	$	344,365	$	277,055	$	2,607,032

Note: Amounts exclude the repricing of liabilities from prior periods.

As part of an overall interest rate risk management strategy, derivative instruments may also be used as an efficient way to modify the repricing or maturity characteristics of on-balance sheet assets and liabilities. Management may from time to time engage in interest rate swaps to effectively manage interest rate risk. The interest rate swaps of the Company would modify net interest sensitivity to levels deemed appropriate.

IMPACT OF INFLATION AND CHANGING PRICES

The consolidated financial statements and related financial data presented herein have been prepared in accordance with generally accepted accounting principles, which generally require the measurement of financial position and operating results in terms of historical dollars, without considering changes in relative purchasing power over time due to inflation. Unlike most industrial companies, the majority of the Company’s assets and liabilities are monetary in nature. As a result, interest rates generally have a more significant impact on the Company’s performance than does the effect of inflation. Although fluctuations in interest rates are neither completely predictable nor controllable, the Company regularly monitors its interest rate position and oversees its financial risk management by establishing policies and operating limits. Interest rates do not necessarily move in the same direction or in the same magnitude as the prices of goods and services, since such prices are affected by inflation to a larger extent than interest rates. Although not as critical to the banking industry as to other industries, inflationary factors may have some impact on the Company’s growth, earnings, total assets and capital levels. Management does not expect inflation to be a significant factor in 2015.

52

Glossary of Defined Terms

Term	Definition
ACL	Allowance for credit losses
Acquired loans	Loans acquired in a business combination
AFS	Available-for-sale securities
ALLL	Allowance for loan and lease losses
AOCI	Accumulated other comprehensive income (loss)
ASC	Accounting Standards Codification
ASU	Accounting Standards Update
Basel III	Global regulatory standards on bank capital adequacy and liquidity published by the BCBS
BCBS	Basel Committee on Banking Supervision
CDE	IBERIA CDE, LLC
CSB	CapitalSouth Bank
Company	IBERIABANK Corporation and Subsidiaries
Covered Loans	Acquired loans with loss protection provided by the FDIC
Dodd-Frank Act	Dodd-Frank Wall Street Reform and Consumer Protection Act
EPS	Earnings per common share
FASB	Financial Accounting Standards Board
FDIC	Federal Deposit Insurance Corporation
First Private	First Private Holdings, Inc
FHLB	Federal Home Loan Bank
Florida Bank Group	Florida Bank Group, Inc
FRB	Board of Governors of the Federal Reserve System
GAAP	Accounting principles generally accepted in the United States of America
Georgia Commerce	Georgia Commerce Bancshares, Inc.
GSE	Government-sponsored enterprises
HTM	Held-to-maturity
IAM	IBERIA Asset Management, Inc.
ICP	IBERIA Capital Partners, LLC
IMC	IBERIABANK Mortgage Company
Legacy loans	Loans that were originated directly by the Company
LIBOR	London Interbank Borrowing Offered Rate
LIHTC	Low-income housing tax credit
LTC	Lenders Title Company
MSA	Metropolitan statistical area
Old Florida	Old Florida Bancshares, Inc.
OREO	Other real estate owned
Parent	IBERIABANK Corporation
RRP	Recognition and Retention Plan
RULC	Reserve for unfunded lending commitments
SEC	Securities and Exchange Commission
Teche	Teche Holding Company
TDR	Troubled debt restructuring
Trust One-Memphis	Trust One Bank (Memphis Operations)
U.S.	United States of America

53

MANAGEMENT REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING

To the Board of Directors of

IBERIABANK Corporation

The management of IBERIABANK Corporation (the “Company”) is responsible for establishing and maintaining effective internal control over financial reporting. The Company’s internal control system was designed to provide reasonable assurance to the Company’s management and Board of Directors regarding the preparation and fair presentation of the Company’s financial statements for external purposes in accordance with U.S. generally accepted accounting principles. Internal control over financial reporting includes self-monitoring mechanisms, and actions are taken to correct deficiencies as they are identified.

All internal control systems, no matter how well designed, have inherent limitations and may not prevent or detect misstatements in the Company’s financial statements, including the possibility of circumvention or overriding of controls. Therefore, even those systems determined to be effective can provide only reasonable assurance with respect to financial statement preparation and presentation. Projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of a change in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

The Company’s management assessed the effectiveness of the Company’s internal control over financial reporting as of December 31, 2014. In making this assessment, it used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in Internal Control—Integrated Framework (2013 Framework). Based on its assessment, management believes that, as of December 31, 2014, the Company’s internal control over financial reporting is effective based on those criteria.

The Company’s independent registered public accounting firm has also issued an attestation report on the effectiveness of the Company’s internal control over financial reporting as of December 31, 2014.

/s/ Daryl G. Byrd	/s/ Anthony J. Restel
Daryl G. Byrd	Anthony J. Restel
President and Chief Executive Officer	Senior Executive Vice President and Chief Financial Officer

54

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors and Shareholders

IBERIABANK Corporation

We have audited IBERIABANK Corporation and subsidiaries’ internal control over financial reporting as of December 31, 2014, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the COSO criteria). IBERIABANK Corporation’s management is responsible for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management Report on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

In our opinion, IBERIABANK Corporation maintained, in all material respects, effective internal control over financial reporting as of December 31, 2014, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheets of IBERIABANK Corporation and subsidiaries as of December 31, 2014 and 2013, and the related consolidated statements of comprehensive income, shareholders’ equity, and cash flows for each of the three years in the period ended December 31, 2014 and our report dated March 2, 2015, expressed an unqualified opinion thereon.

/s/ Ernst & Young LLP

New Orleans, Louisiana

March 2, 2015

55

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors and Shareholders

IBERIABANK Corporation

We have audited the accompanying consolidated balance sheets of IBERIABANK Corporation as of December 31, 2014 and 2013, and the related consolidated statements of comprehensive income, shareholders’ equity, and cash flows for each of the three years in the period ended December 31, 2014. These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on these financial statements based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in all material respects, the consolidated financial position of IBERIABANK Corporation at December 31, 2014 and 2013, and the consolidated results of its operations and its cash flows for each of the three years in the period ended December 31, 2014 in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), IBERIABANK Corporation’s internal control over financial reporting as of December 31, 2014, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) and our report dated March 2, 2015, expressed an unqualified opinion thereon.

/s/ Ernst & Young LLP

New Orleans, Louisiana

March 2, 2015

56

IBERIABANK CORPORATION AND SUBSIDIARIES

Consolidated Balance Sheets

	December 31
(Dollars in thousands, except share data)	2014			2013
Assets
Cash and due from banks	$	251,994		$	238,672
Interest-bearing deposits in banks		296,101			152,724
Total cash and cash equivalents		548,095			391,396
Securities available for sale, at fair value		2,158,853			1,936,797
Securities held to maturity (fair values of $119,481 and $152,566, respectively)		116,960			154,109
Mortgage loans held for sale ($139,950 and $97,273 recorded at fair value, respectively)		140,072			128,442
Loans covered by loss share agreements		444,544			719,793
Non-covered loans, net of unearned income		10,996,500			8,772,226
Total loans, net of unearned income		11,441,044			9,492,019
Allowance for loan losses		(130,131	)		(143,074	)
Loans, net		11,310,913			9,348,945
FDIC loss share receivables		69,627			162,312
Premises and equipment, net		307,159			287,510
Goodwill		517,526			401,872
Other assets		589,400			554,167
Total Assets	$	15,758,605		$	13,365,550
Liabilities
Deposits:
Non-interest-bearing	$	3,195,430		$	2,575,939
Interest-bearing		9,325,095			8,161,061
Total deposits		12,520,525			10,737,000
Short-term borrowings		845,742			680,344
Long-term debt		403,254			280,699
Other liabilities		136,235			136,528
Total Liabilities		13,905,756			11,834,571
Shareholders’ Equity
Preferred stock, $1 par value - 5,000,000 shares authorized		—			—
Common stock, $1 par value - 50,000,000 shares authorized; 35,262,901 and 31,917,385 shares issued, respectively		35,263			31,917
Additional paid-in capital		1,398,633			1,178,284
Retained earnings		497,274			436,141
Accumulated other comprehensive income (loss)		7,525			(16,491	)
Treasury stock at cost - 1,809,497 and 2,130,841 shares, respectively		(85,846	)		(98,872	)
Total Shareholders’ Equity		1,852,849			1,530,979
Total Liabilities and Shareholders’ Equity	$	15,758,605		$	13,365,550

The accompanying Notes are an integral part of these Consolidated Financial Statements.

57

IBERIABANK CORPORATION AND SUBSIDIARIES

Consolidated Statements of Comprehensive Income

	Years Ended December 31
(Dollars in thousands, except per share data)	2014			2013			2012
Interest and Dividend Income
Loans, including fees	$	526,706		$	488,936		$	513,936
Mortgage loans held for sale, including fees		5,153			5,108			5,318
Investment securities:
Taxable interest		38,815			31,562			33,890
Tax-exempt interest		5,862			6,668			7,375
Amortization of FDIC loss share receivable		(74,617	)		(97,849	)		(118,100	)
Other		2,896			2,772			2,781
Total interest and dividend income		504,815			437,197			445,200
Interest Expense
Deposits:
NOW and MMDA		18,483			18,933			23,936
Savings		325			309			573
Time deposits		14,282			16,604			24,855
Short-term borrowings		1,364			490			650
Long-term debt		10,250			10,617			13,436
Total interest expense		44,704			46,953			63,450
Net interest income		460,111			390,244			381,750
Provision for loan losses		19,060			5,145			20,671
Net interest income after provision for loan losses		441,051			385,099			361,079
Non-interest Income
Service charges on deposit accounts		35,573			28,871			26,852
Mortgage income		51,797			64,197			78,053
Title revenue		20,492			20,526			20,987
ATM/debit card fee income		12,023			9,510			8,978
Income from bank owned life insurance		5,473			3,647			3,680
Gain on sale of available for sale investments		771			2,277			3,739
Derivative losses reclassified from other comprehensive income		—			(391	)		(1,618	)
Broker commissions		18,783			16,333			13,446
Other income		28,716			23,988			21,880
Total non-interest income		173,628			168,958			175,997
Non-interest Expense
Salaries and employee benefits		259,086			244,981			233,777
Net occupancy and equipment		59,571			58,037			54,672
Impairment of FDIC loss share receivables and other long-lived assets		6,437			37,893			2,902
Communication and delivery		12,029			12,024			12,671
Marketing and business development		11,707			10,143			12,546
Data processing		27,249			17,853			15,590
Amortization of acquisition intangibles		5,807			4,720			5,150
Professional services		18,975			18,217			21,095
Costs of OREO property, net		2,748			1,943			6,352
Credit and other loan related expense		13,692			15,931			18,095
Insurance		14,359			11,272			10,771
Travel and entertainment		9,033			8,126			9,563
Other expenses		33,786			31,945			29,001
Total non-interest expense		474,479			473,085			432,185
Income before income tax expense		140,200			80,972			104,891
Income tax expense		34,750			15,869			28,496
Net Income		105,450			65,103			76,395
Income Available to Common Shareholders - Basic	$	105,450		$	65,103		$	76,395
Earnings Allocated to Unvested Restricted Stock		(1,685	)		(1,209	)		(1,437	)
Earnings Available to Common Shareholders - Diluted		103,765			63,894			74,958
Earnings per common share - Basic	$	3.32		$	2.20		$	2.59
Earnings per common share - Diluted		3.30			2.20			2.59
Cash dividends declared per common share		1.36			1.36			1.36
Other comprehensive income (loss)
Unrealized gains on securities:
Unrealized holding gains (losses) arising during the period	$	37,719		$	(62,095	)	$	2,174
Reclassification adjustment for gains included in net income		(771	)		(2,277	)		(3,739	)
Unrealized gain (loss) on securities, before tax		36,948			(64,372	)		(1,565	)
Fair value of derivative instruments designated as cash flow hedges:
Change in fair value of derivative instruments designated as cash flow hedges during the period		—			953			(22	)
Reclassification adjustment for losses included in net income		—			391			1,618
Fair value of derivative instruments designated as cash flow hedges, before tax		—			1,344			1,596
Other comprehensive income (loss), before tax		36,948			(63,028	)		31
Income tax expense (benefit) related to items of other comprehensive (loss) income		12,932			(22,060	)		11
Other comprehensive income (loss), net of tax		24,016			(40,968	)		20
Comprehensive income	$	129,466		$	24,135		$	76,415

The accompanying Notes are an integral part of these Consolidated Financial Statements.

58

IBERIABANK CORPORATION AND SUBSIDIARIES

Consolidated Statements of Shareholders’ Equity

					Additional Paid-In Capital			Retained Earnings			Accumulated Other Comprehensive Income (Loss)
	Common Stock													Treasury Stock
(Dollars in thousands, except share and per share data)	Shares		Amount											Shares			Amount			Total
Balance, December 31, 2011		31,163,070	$	31,163	$	1,135,880		$	375,184		$	24,457			1,789,165		$	(84,023	)		1,482,661
Net income		—		—		—			76,395			—			—			—			76,395
Other comprehensive income		—		—		—			—			20			—			—			20
Cash dividends declared, $1.36 per share		—		—		—			(40,107	)		—			—			—			(40,107	)
Reissuance of treasury stock under incentive plans, net of shares surrendered in payment, including tax benefit		—		—		(354	)		—			—			(51,328	)		2,576			2,222
Common stock issued for acquisitions		754,315		754		38,449			—			—			—			—			39,203
Treasury stock issued for recognition and retention plans		—		—		(7,702	)		—			—			(163,505	)		7,702			—
Share-based compensation cost		—		—		9,907			—			—			—			—			9,907
Treasury stock acquired at cost		—		—		—			—			—			853,308			(40,433	)		(40,433	)
Balance, December 31, 2012		31,917,385	$	31,917	$	1,176,180		$	411,472		$	24,477			2,427,640		$	(114,178	)	$	1,529,868
Net income		—		—		—			65,103			—			—			—			65,103
Other comprehensive loss		—		—		—			—			(40,968	)		—			—			(40,968	)
Cash dividends declared, $1.36 per share		—		—		—			(40,434	)		—			—			—			(40,434	)
Reissuance of treasury stock under incentive plans, net of shares surrendered in payment, including tax benefit		—		—		(607	)		—			—			(147,392	)		7,314			6,707
Treasury stock issued for recognition and retention plans		—		—		(7,992	)		—			—			(149,407	)		7,992			—
Share-based compensation cost		—		—		10,703			—			—			—			—			10,703
Balance, December 31, 2013		31,917,385	$	31,917	$	1,178,284		$	436,141		$	(16,491	)		2,130,841		$	(98,872	)	$	1,530,979
Net income		—		—		—			105,450			—			—			—			105,450
Other comprehensive income		—		—		—			—			24,016			—			—			24,016
Cash dividends declared, $1.36 per share		—		—		—			(44,317	)		—			—			—			(44,317	)
Reissuance of treasury stock under incentive plans, net of shares surrendered in payment, including tax benefit		—		—		3,242			—			—			(190,443	)		6,829			10,071
Common stock issued for acquisitions		3,345,516		3,346		211,319			—			—			—			—			214,665
Treasury stock issued for recognition and retention plans		—		—		(6,197	)		—			—			(130,901	)		6,197			—
Share-based compensation cost		—		—		11,985			—			—			—			—			11,985
Balance, December 31, 2014		35,262,901	$	35,263	$	1,398,633		$	497,274		$	7,525			1,809,497		$	(85,846	)	$	1,852,849

The accompanying Notes are an integral part of these Consolidated Financial Statements.

59

IBERIABANK CORPORATION AND SUBSIDIARIES

Consolidated Statements of Cash Flows

	Years Ended December 31
(Dollars in thousands)	2014			2013			2012
Cash Flows from Operating Activities
Net income	$	105,450		$	65,103		$	76,395
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization, and accretion		15,791			25,388			21,685
Amortization of purchase accounting adjustments, net		7,536			(5,965	)		(47,383	)
Provision for loan losses		19,060			5,145			20,671
Share-based equity compensation expense		11,985			10,703			9,907
(Gain) Loss on sale of assets, net		(14	)		(251	)		(42	)
Gain on sale of available for sale investments		(771	)		(2,277	)		(3,739	)
Gain on sale of OREO, net		(4,221	)		(6,022	)		(4,985	)
Loss on abandonment of fixed assets		—			4,941			2,743
Impairment of FDIC loss share receivables		5,121			31,813			—
Amortization of premium/discount on investments		13,793			18,953			21,013
Derivative losses (gains) on swaps		1			(209	)		1
Benefit for deferred income taxes		(24,955	)		(35,943	)		(7,527	)
Originations of mortgage loans held for sale		(1,675,538	)		(2,116,460	)		(2,432,367	)
Proceeds from sales of mortgage loans held for sale		1,716,565			2,320,885			2,388,716
Gain on sale of mortgage loans held for sale, net		(59,156	)		(65,393	)		(70,811	)
Tax benefit associated with share-based payment arrangements		(2,105	)		(886	)		(1,221	)
Decrease (Increase) in other assets		11,702			(17,534	)		7,437
Other operating activities, net		(20,881	)		77,792			7,319
Net Cash Provided by (Used in) Operating Activities		119,363			309,783			(12,188	)
Cash Flows from Investing Activities
Proceeds from sales of securities available for sale		61,702			44,677			154,222
Proceeds from maturities, prepayments and calls of securities available for sale		488,699			709,977			880,425
Purchases of securities available for sale		(703,179	)		(1,026,290	)		(935,164	)
Proceeds from maturities, prepayments and calls of securities held to maturity		36,182			55,706			43,535
Purchases of securities held to maturity		—			(5,901	)		(57,075	)
Reimbursement of recoverable covered asset losses (to) from the FDIC		5,734			68,233			157,694
Increase in loans receivable, net		(824,437	)		(1,030,545	)		(870,577	)
Proceeds from sale of premises and equipment		5,129			8,714			1,274
Purchases of premises and equipment		(29,841	)		(16,941	)		(32,825	)
Proceeds from disposition of real estate owned		84,429			116,612			109,067
Cash paid for additional investment in tax credit entities		(13,191	)		(2,213	)		(21,368	)
Cash received in excess of cash paid for acquisition		188,803			—			32,425
Other investing activities, net		(12,785	)		(2,636	)		10,691
Net Cash Used in Investing Activities		(712,755	)		(1,080,607	)		(527,676	)
Cash Flows from Financing Activities
Increase (decrease) in deposits, net of deposits acquired		641,026			(10,689	)		1,174,829
Net change in short-term borrowings, net of borrowings acquired		110,298			377,299			(102,320	)
Proceeds from long-term debt		54,637			2,867			24,086
Repayments of long-term debt		(22,871	)		(144,609	)		(80,770	)
Dividends paid to shareholders		(43,070	)		(40,332	)		(40,069	)
Proceeds from sale of treasury stock for stock options exercised		11,693			8,101			2,813
Payments to repurchase common stock		(3,727	)		(2,280	)		(42,245	)
Tax benefit associated with share-based payment arrangements		2,105			886			1,221
Net Cash Provided by Financing Activities		750,091			191,243			937,545
Net Increase (Decrease) In Cash and Cash Equivalents		156,699			(579,581	)		397,681
Cash and Cash Equivalents at Beginning of Period		391,396			970,977			573,296
Cash and Cash Equivalents at End of Period	$	548,095		$	391,396		$	970,977
Supplemental Schedule of Noncash Activities
Acquisition of real estate in settlement of loans	$	27,050		$	93,040		$	99,134
Common stock issued in acquisition	$	214,665		$	—		$	39,203
Transfers of property into Other Real Estate	$	37,273		$	93,040		$	106,427
Supplemental Disclosures
Cash paid for:
Interest on deposits and borrowings	$	43,210		$	47,466		$	63,984
Income taxes, net	$	52,094		$	29,063		$	15,957

The accompanying Notes are an integral part of these Consolidated Financial Statements.

60

IBERIABANK CORPORATION AND SUBSIDIARIES

Notes to Consolidated Financial Statements

NOTE 1 – SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

PRINCIPLES OF CONSOLIDATION

The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries, IBERIABANK, Lenders Title Company (“LTC”), IBERIA Capital Partners L.L.C. (“ICP”), IB Aircraft Holdings, LLC, 1887 Leasing LLC, IBERIA Asset Management, Inc. (“IAM”), and IBERIA CDE, L.L.C. (“CDE”). All significant intercompany balances and transactions have been eliminated in consolidation. All normal, recurring adjustments which, in the opinion of management, are necessary for a fair presentation of the financial statements have been included. Certain amounts reported in prior periods have been reclassified to conform to the current period presentation.

NATURE OF OPERATIONS

The Company offers commercial and retail banking products and services to customers throughout locations in six states through IBERIABANK. The Company also operates mortgage production offices in twelve states through IBERIABANK Mortgage Company (“IMC”), and offers a full line of title insurance and closing services throughout Arkansas and Louisiana through LTC and its subsidiaries. ICP provides equity research, institutional sales and trading, and corporate finance services. 1887 Leasing LLC owns an aircraft used by management of the Company, and IB Aircraft Holdings, LLC owns a fractional share of a separate aircraft also used by management. IAM provides wealth management and trust services for commercial and private banking clients. CDE is engaged in the purchase of tax credits.

USE OF ESTIMATES

The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates. Material estimates that are susceptible to significant change in the near term are the allowance for credit losses, valuation of and accounting for loans covered by loss sharing arrangements with the FDIC and the related loss share receivables, and determination of fair values of assets acquired in acquisitions.

CONCENTRATION OF CREDIT RISKS

Most of the Company’s business activity is with customers located within the States of Louisiana, Florida, Arkansas, Alabama, Texas, and Tennessee. The Company’s lending activity is concentrated in its market areas in those states. The Company has emphasized originations of commercial loans and private banking loans, defined as loans to larger consumer clients. Repayments on loans are expected to come from cash flows of the borrower and/or guarantor. Losses on secured loans are limited by the value of the collateral upon default of the borrowers. The Company does not have any significant concentrations to any one industry or customer.

CASH AND CASH EQUIVALENTS

For purposes of presentation in the consolidated statements of cash flows, cash and cash equivalents are defined as cash, interest-bearing deposits and non-interest-bearing demand deposits at other financial institutions with original maturities less than three months. IBERIABANK may be required to maintain average balances on hand or with the Federal Reserve Bank to meet regulatory reserve and clearing requirements. At December 31, 2014 and 2013, the required reserve balances were $17.4 million and $6.7 million, respectively. IBERIABANK had enough cash deposited with the Federal Reserve at December 31, 2014 and 2013 to cover the required reserve balance.

INVESTMENT SECURITIES

Debt securities that management has the ability and intent to hold to maturity are classified as held to maturity and carried at cost, adjusted for amortization of premiums and accretion of discounts using methods approximating the interest method. Securities not classified as held to maturity or trading, including equity securities with readily determinable fair values, are classified as available for sale and recorded at fair value, with unrealized gains and losses excluded from earnings and reported in other comprehensive income. Declines in the value of individual held to maturity and available for sale securities below their cost that are other than temporary are included in earnings as realized losses. In estimating other than temporary impairment losses, management considers 1) the length of time and the extent to which the fair value has been less than cost, 2) the financial condition and near-term prospects of the issuer, 3) the intent and ability of the Company to retain its investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value, and 4) for debt securities, the recovery of contractual principal and interest. Gains or losses on securities sold are recorded on the trade date, using the specific identification method.

LOANS HELD FOR SALE

Loans held for sale primarily consist of fixed rate single-family residential mortgage loans originated and under contract to be sold in the secondary market. Mortgage loans originated and held for sale are recorded at fair value under the fair value option, unless otherwise noted. Any other loans held for sale are carried at the lower of cost or estimated fair value. For mortgage loans for which the Company has elected the fair value option, gains and losses are included in mortgage income. For any other loans held for sale, net unrealized losses, if any, are recognized through a valuation allowance that is recorded as a charge to income. See Note 23 for further discussion of the determination of fair value for loans held for sale. In most cases, loans in this category are sold within thirty days and are generally sold with the mortgage servicing rights released. Buyers generally have recourse to return a purchased loan to the Company under limited circumstances. Recourse conditions may include early payment default, breach of representations or warranties, and documentation deficiencies. During 2014 and 2013, an insignificant number of loans were returned to the Company. At December 31, 2014, mortgage loans held for sale subject to repurchase were immaterial.

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LOANS, EXCLUDING ACQUIRED LOANS (“LEGACY LOANS”)

The Company grants mortgage, commercial and consumer loans to customers. Except for loans acquired, loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are stated at the unpaid principal balances, less the allowance for credit losses and net deferred loan origination fees and unearned discounts.

Interest income on loans is accrued over the term of the loans based on the principal balance outstanding. Loan origination fees, net of certain direct origination costs, are deferred and recognized as an adjustment of the related loan yield, using the effective interest method.

The accrual of interest on loans is discontinued at the time the loan is 90 days delinquent unless the credit is well-secured and in process of collection. Mortgage, credit card and other personal loans are typically charged down to net collateral value, less cost to sell, no later than 180 days past due. Past due status is based on the contractual terms of loans. In all cases, loans are placed on nonaccrual status or charged off at an earlier date if collection of principal or interest is considered doubtful.

The Company’s covered loan portfolio and non-covered loan portfolio, which is delineated between a) legacy loans and b) acquired loans, are disaggregated into portfolio segments for purposes of determining the allowance for credit losses. The Company’s portfolio segments include commercial, mortgage, and consumer. The Company further disaggregates each commercial, mortgage, and consumer portfolio segment into classes for purposes of monitoring and assessing credit quality based on certain risk characteristics. Classes within the commercial loan portfolio segment include commercial real estate construction, commercial real estate – other, and commercial business. Classes within the mortgage portfolio segment include mortgage – prime and mortgage – subprime. Classes within the consumer portfolio segment include home equity, indirect auto, credit card, and consumer – other.

Credit Quality

The Company utilizes an asset risk classification system in accordance with guidelines established by the Federal Reserve Board as part of its efforts to monitor commercial asset quality. “Special mention” loans are defined as loans where known information about possible credit problems of the borrower cause management to have some doubt as to the ability of these borrowers to comply with the present loan repayment terms and which may result in future disclosure of these loans as nonperforming. For assets with identified credit issues, the Company has two primary classifications for problem assets: “substandard” and “doubtful.” Substandard assets have one or more defined weaknesses and are characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. Doubtful assets have the weaknesses of substandard assets with the additional characteristic that the weaknesses make collection or liquidation in full satisfaction of the loan balance outstanding questionable, which makes probability of loss based on currently existing facts, conditions and values higher. Loans classified as “Pass” do not meet the criteria set forth for special mention, substandard, or doubtful classification and are not considered criticized. Asset risk classifications are periodically reviewed and changed if, in the opinion of management, the risk profile of the customer has changed since the last review of the loan relationship.

A loan is considered impaired when, based on current information and events, it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Impairment losses are measured on a loan by loan basis for commercial and certain consumer loans based on either the present value of expected future cash flows discounted at the loan’s effective interest rate, the loan’s observable market price, or the fair value of the collateral if the loan is collateral dependent.

In general, all interest accrued but not collected for loans that are placed on nonaccrual status or charged off is reversed against interest income. The interest on these loans is accounted for on the cash-basis method or cost-recovery method, until the loans qualify for a return to accrual status. Loans are returned to accrual status when all principal and interest amounts contractually due are brought current and future payments are reasonably assured.

Troubled Debt Restructurings

During the course of its lending operations, the Company periodically grants concessions to its customers in an attempt to protect as much of its investment as possible and minimize risk of loss. These concessions may include restructuring the terms of a customer loan to alleviate the burden of the customer’s near-term cash requirements. In order to be considered a troubled debt restructuring (“TDR”), the Company must conclude that the restructuring constitutes a concession and the customer is experiencing financial difficulties. The Company defines a concession to the customer as a modification of existing terms for economic or legal reasons that it would otherwise not consider. The concession is either granted through an agreement with the customer or is imposed by a court or law. Concessions include modifying original loan terms to reduce or defer cash payments required as part of the loan agreement, including but not limited to:

• a reduction of the stated interest rate for the remaining original life of the debt,

• extension of the maturity date or dates at a stated interest rate lower than the current market rate for new debt with similar risk characteristics,

• reduction of the face amount or maturity amount of the debt as stated in the agreement, or

• reduction of accrued interest receivable on the debt.

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In its determination of whether the customer is experiencing financial difficulties, the Company considers numerous indicators, including, but not limited to:

• whether the customer is currently in default on its existing loan, or is in an economic position where it is probable the customer will be in default on its loan in the foreseeable future without a modification,

• whether the customer has declared or is in the process of declaring bankruptcy,

• whether there is substantial doubt about the customer’s ability to continue as a going concern,

• whether, based on its projections of the customer’s current capabilities, the Company believes the customer’s future cash flows will be insufficient to service the debt, including interest, in accordance with the contractual terms of the existing agreement for the foreseeable future, and

• whether, without modification, the customer cannot obtain sufficient funds from other sources at an effective interest rate equal to the current market rate for similar debt for a nontroubled debtor.

If the Company concludes that both a concession has been granted and the concession was granted to a customer experiencing financial difficulties, the Company identifies the loan as a TDR. For purposes of the determination of an allowance for credit losses for TDRs, the Company considers a loss probable on the loan, which is reviewed for specific impairment in accordance with the Company’s allowance for loan loss methodology. If it is determined that losses are probable on such TDRs, either because of delinquency or other credit quality indicator, the Company establishes specific reserves for these loans.

ACQUIRED LOANS

The Company accounts for its business combinations under the acquisition method, where all identifiable assets acquired, including loans, are recorded at fair value. Acquired loans are recorded at fair value in accordance with the fair value methodology consistent with the exit price concept. Credit risk assumptions and any resulting credit discounts are included in the determination of fair value. Therefore, an allowance for credit losses is not recorded at the acquisition date. The determination of fair value includes estimates related to discount rates, expected prepayments and the amount and timing of undiscounted expected principal, interest and other cash flows.

Acquired loans are evaluated at acquisition and classified as purchased impaired (“acquired impaired”) or purchased non-impaired (“acquired non-impaired”). Purchased impaired loans reflect credit deterioration since origination to the extent that it is probable at the time of acquisition that the Company will be unable to collect all contractually required payments. At the time of acquisition, purchased impaired loans are accounted for individually or aggregated into loan pools with similar characteristics, which include:

• whether the loan is performing according to contractual terms at the time of acquisition,

• the loan type based on regulatory reporting guidelines, namely whether the loan was a mortgage, consumer, or commercial loan

• the nature of collateral,

• the interest rate type, whether fixed or variable rate, and

• the loan payment type, primarily whether the loan is amortizing or interest-only.

From these pools, the Company uses certain loan information, including outstanding principal balance, estimated expected losses, weighted average maturity, weighted average term to re-price (if a variable rate loan), weighted average margin, and weighted average interest rate to estimate the expected cash flow for each loan pool.

For purchased impaired loans, expected cash flows at the acquisition date in excess of the fair value of loans are recorded as interest income over the life of the loans using a level yield method if the timing and amount of future cash flows is reasonably estimable. For purchased non-impaired loans, the difference between the fair value and unpaid principal balance of the loan at acquisition, referred to as a purchase premium or purchase discount, is amortized or accreted to income over the estimated life of the loans using a method that approximates the interest method.

Subsequent to acquisition, the Company performs cash flow re-estimations at least quarterly for each purchased impaired loan and/or loan pool. Increases in estimated cash flows above those expected at acquisition are recognized on a prospective basis as interest income over the remaining life of the pool. Decreases in expected cash flows subsequent to acquisition result in recognition of a provision for credit loss.

Purchased impaired loans are placed on nonaccrual status when the Company cannot reasonably estimate cash flows on a loan or loan pool.

FDIC LOSS SHARE RECEIVABLE

Because the FDIC reimburses the Company for losses on certain loans acquired in 2009 and 2010, indemnification assets were recorded at fair value as of the acquisition dates. The initial values of the indemnification assets were based on estimated cash flows to be received over the expected life of the acquired assets, not to exceed the term of the indemnification agreements. The loss sharing terms of the Company’s commercial and single family residential indemnification agreements are five years and ten years, respectively, from the date of acquisition. The CSB reimbursable loss period ended as of October 1, 2014 for all covered assets excluding single family residential assets. The CSB reimbursable loss period for single family residential assets will end during the third quarter of 2019. The Century and Orion reimbursable loss periods ended as of January 1, 2015 for all covered assets excluding single family residential assets and will end during the fourth quarter of 2019 for single family residential assets. The Sterling reimbursable loss period ends during the third quarter of 2015 for all covered assets excluding single family residential assets and during the third quarter of 2020 for single family residential assets. Assets are covered through expiration of the loss share term, at which point such assets are considered non-covered.

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Because the indemnification assets are measured on the same basis as the indemnified (“covered”) loans, subject to contractual and collectability limitations, the indemnification assets are impacted by changes in expected cash flows on covered assets. Increases in credit losses expected to occur within the loss share term are recorded as current period increases to the allowance for credit losses and increase the amount collectible from the FDIC by the applicable loss share percentage. Decreases in credit losses expected to occur within the loss share term reduce the amount collectible from the FDIC and increase the amount collectible from customers in the form of prospective accretion on loans. Increases in the portion of indemnification asset collectible from customers are amortized to income. Periodic amortization represents the amount that is expected to result in symmetrical recognition of pool-level accretion and amortization over the shorter of 1) the life of the loan or 2) the life of the shared loss agreement.

The Company assesses the indemnification assets for collectibility at the acquisition level based on three sources: 1) the FDIC, 2) OREO transactions, and 3) customers. Amounts collectible from the FDIC through loss reimbursements are comprised of losses currently expected within the loss share term. A current period impairment would be recorded to the extent that events or circumstances indicate that losses previously expected to occur within the loss share term are expected to occur subsequent to loss share termination. Amounts collectible through expected gains on the sale of OREO are written-up or impaired each period based on the best available information.

Loss assumptions used to measure the basis of the indemnified loans are consistent with the loss assumptions used to measure the indemnification assets.

The indemnification asset is reduced when cash is received from the FDIC.

ALLOWANCE FOR CREDIT LOSSES

The manner in which the allowance for credit losses is determined is based on the accounting method applied to the underlying loans. The Company delineates between loans accounted for under the contractual yield method, primarily legacy loans, and loans accounted for as purchased impaired loans, primarily acquired loans.

Legacy Loans

Legacy loans represent loans accounted for under the contractual yield method. The Company’s legacy loans include loans originated by the Company and acquired loans that are not accounted for as acquired credit impaired loans.

The Legacy ACL represents management’s best estimate of probable credit losses inherent at the balance sheet date. Determination of the Legacy ACL involves a high degree of complexity and requires significant judgment. Several factors are taken into consideration in the determination of the overall Legacy ACL, including a qualitative component. These factors include, but are not limited to, the overall risk profiles of the loan portfolios, net charge-off experience, the extent of impaired loans, the level of nonaccrual loans, the level of 90 days past due loans and the overall percentage level of the allowance. The Company also considers overall asset quality trends, changes in lending and risk management practices and procedures, trends in the nature and volume of the loan portfolio, including the existence and effect of any portfolio concentrations, changes in experience and depth of lending staff, the Company’s legal, regulatory and competitive environment, national and regional economic trends, and data availability and applicability that might impact the portfolio. See the “Application of Critical Accounting Policies and Estimates” section for more information.

During 2014, the Company did not substantively change any material aspect of its overall approach in the determination of the allowance for credit losses and there have been no material changes in assumptions or estimation techniques as compared to December 31, 2013. However, during the third quarter of 2013, the Company modified its methodology for estimating its allowance for credit losses on its non-covered, non-acquired loan portfolio to incorporate practices, processes, and methodologies consistent with the guidance provided in the FRB’s inter-agency policy statement 2006 SR 06-17. The methodology was modified to segregate the reserve for unfunded lending commitments (“RULC”), previously included in the Company’s allowance for loan losses, into a separate liability on the Company’s consolidated balance sheet, and to enhance the previous methodology around loss migration.

Certain inherent, but unconfirmed losses are probable within the loan portfolio. The Company’s current methodology for determining the level of losses is based on historical loss rates, current credit grades, specific allocation and other qualitative adjustments. In a stable or deteriorating credit environment, heavy reliance on historical loss rates and the credit grade rating process results in model-derived required reserves that tend to slightly lag behind portfolio deterioration. Similar lags can occur in an improving credit environment whereby required reserves can lag slightly behind portfolio improvement. Given these model limitations, qualitative adjustment factors may be incremental or decremental to the quantitative model results.

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Acquired Impaired Loans

Acquired impaired loans, which include covered loans and certain non-covered loans, represent loans acquired by the Company that are accounted for in accordance with ASC Topic 310-30.

Loans acquired in business combinations were recorded at their acquisition date fair values, which were based on expected cash flows and included estimates of expected future credit losses. Under current accounting principles, information regarding the Company’s estimates of loan fair values may be adjusted for a period of up to one year as the Company continues to refine its estimate of expected future cash flows in the acquired portfolio. If the Company discovers that it has materially underestimated the credit losses expected in the loan portfolio based on information available at the acquisition date within the purchase accounting period, it will retroactively reduce or eliminate the gain and/or increase goodwill recorded on the acquisition. If the Company determines that losses arose after the acquisition date, the additional losses will be reflected as a provision for credit losses.

At December 31, 2014, the Company had an allowance for credit losses of $45 million to reserve for expected losses currently in the covered loan portfolio and $9 million to reserve for probable losses currently in the acquired impaired loan portfolio that have arisen after the losses were estimated at the respective acquisition dates. Based on facts and circumstances available, management of the Company believes that the acquired impaired allowance for credit losses was appropriate at December 31, 2014. However, future adjustments to the allowance may be necessary, and the results of operations could be adversely affected, if circumstances differ substantially from the assumptions used by management in determining the allowance for credit losses.

OFF-BALANCE SHEET CREDIT-RELATED FINANCIAL INSTRUMENTS

The Company accounts for its guarantees in accordance with the provisions of ASC Topic 460. In the ordinary course of business, the Company has entered into commitments to extend credit, including commitments under commercial construction arrangements, commercial and home equity lines of credit, credit card arrangements, commercial letters of credit and standby letters of credit. Such financial instruments are recorded when they are funded.

DERIVATIVE FINANCIAL INSTRUMENTS

The Company enters into derivative financial instruments to manage interest rate risk, asset sensitivity, and other exposures such as liquidity and credit risk. The primary types of derivatives used by the Company include interest rate swap agreements, interest rate lock commitments, forward sales commitments, and written and purchased options. All derivative instruments are recognized on the consolidated balance sheets as other assets or other liabilities at fair value, as required by ASC Topic 815.

As part of its activities to manage interest rate risk (i.e., the exposure to the variability of future cash flows or other forecasted transactions due to fluctuating market rates), the Company enters into interest rate contracts, which typically include interest rate swap agreements. The Company primarily utilizes these instruments, which the Company designates as cash flow hedges, to convert a portion of its variable-rate loans or debt to a fixed rate. In addition to using interest rate swap agreements to manage interest rate risk, the Company also enters into derivative instruments to help its commercial customers manage their exposure to interest rate fluctuations or other customers to facilitate business transactions. To mitigate the market risk associated with these customer contracts, the Company enters into offsetting derivative contract positions. The Company manages its credit risk, or potential risk of default by its commercial customers, through credit limit approval and monitoring procedures.

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Interest rate swap agreements

Interest rate swaps are agreements to exchange interest payments based upon notional amounts. The exchange of payments typically involves paying a fixed rate and receiving a variable rate or vice versa.

Interest rate lock commitments

The Company enters into commitments to originate mortgage loans intended for sale whereby the interest rate on the prospective loan is determined prior to funding (“rate lock”). A rate lock is given to a borrower, subject to conditional performance obligations, for a specified period of time that typically does not exceed 60 days. Rate lock commitments on mortgage loans that are intended to be sold are considered to be derivatives. Accordingly, such commitments are recorded at fair value as derivative assets or liabilities, with changes in fair value recorded in mortgage income on the consolidated statements of comprehensive income.

Forward sales commitments

The Company uses forward sales commitments to protect the value of its rate locks and mortgage loans held for sale from changes in interest rates and pricing between the origination of the rate lock and sale of these loans, as changes in interest rates have the potential to cause a decline in value of rate locks and mortgage loans included in the held for sale portfolio. These commitments are considered to be derivatives and are recorded at fair value as derivative assets or liabilities, with changes in fair value recorded in mortgage income on the consolidated statements of comprehensive income.

Equity-indexed certificates of deposit

IBERIABANK offers its customers a certificate of deposit that provides the purchaser a guaranteed return of principal at maturity plus potential return, which allows IBERIABANK to identify a known cost of funds. The rate of return is based on the performance of a basket of publically traded stocks that represent a variety of industry segments. Because it is based on an equity index, the rate of return represents an embedded derivative that is not clearly and closely related to the host instrument and is to be accounted for separately. Accordingly, the certificate of deposit is separated into two components: a zero coupon certificate of deposit (the host instrument) and a written option purchased by the depositor (an embedded derivative). The discount on the zero coupon deposit is amortized over the life of the deposit, and the written option is carried at fair value on the Company’s consolidated balance sheets, with changes in fair value recorded through earnings. IBERIABANK offsets the risks of the written option by purchasing an option with terms that mirror the written option and that is also carried at fair value on the Company’s consolidated balance sheets.

Derivatives Designated in Hedging Relationships

For cash flow hedges, the effective portion of the gain or loss related to the derivative instrument is initially reported as a component of other comprehensive income and subsequently reclassified into earnings when the forecasted transaction affects earnings or when the hedge is terminated. The ineffective portion of the gain or loss is reported in earnings immediately. In applying hedge accounting for derivatives, the Company establishes and documents a method for assessing the effectiveness of the hedging derivative and a measurement approach for determining the ineffective aspect of the hedge upon the inception of the hedge.

At December 31, 2014, there were no hedging relationships designated for hedge accounting purposes.

Derivatives Not Designated in Hedging Relationships

For derivative instruments that are not designated as hedging instruments, changes in the fair value of the derivatives are recognized in earnings immediately.

PREMISES AND EQUIPMENT

Land is carried at cost. Buildings, furniture, fixtures, and equipment are carried at cost, less accumulated depreciation computed on a straight line basis over the estimated useful lives of 10 to 40 years for buildings and 3 to 15 years for furniture, fixtures and equipment. Capitalized leasehold improvements are amortized over the length of the initial lease agreement or their useful life, whichever is shorter.

OTHER REAL ESTATE

Other real estate includes all real estate, other than bank premises used in bank operations, owned or controlled by the Company, including real estate acquired in settlement of loans. Properties are recorded at the balance of the loan (which is the pro-rata carrying value of loans accounted for in accordance with ASC Topic 310-30) or at estimated fair value less estimated selling costs, whichever is less, at the date acquired. Subsequent to foreclosure, management periodically performs valuations and the assets are carried at the lower of cost or fair value less estimated selling costs. Revenue and expenses from operations, gain or loss on sale and changes in the valuation allowance are included in net expenses from foreclosed assets.

GOODWILL AND OTHER INTANGIBLE ASSETS

Goodwill

Goodwill is accounted for in accordance with ASC Topic 350, and accordingly is not amortized but is evaluated at least annually for impairment. As part of its testing, the Company first assesses qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If the results of the qualitative assessment indicate impairment, the Company determines the fair value of a reporting unit relative to its carrying amount to determine whether quantitative indicators of impairment are

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present. When the Company determines that the fair value of the reporting unit is below its carrying amount, the Company determines the fair value of the reporting unit’s assets and liabilities, considering deferred taxes, and then measures impairment loss by comparing the implied fair value of goodwill with the carrying amount of that goodwill.

Title Plant

The Company records its title plant assets in accordance with ASC Topic 950. Under ASC Topic 950, costs incurred to construct a title plant, including the costs incurred to obtain, organize, and summarize historical information, are capitalized until the title plant can be used to perform title searches. Purchased title plant, including a purchased undivided interest in title plant, is recorded at cost at the date of acquisition. For title plant acquired separately or as part of a company acquisition, cost is measured as the fair value of the consideration given. Capitalized costs of title plant are not depreciated or charged to income unless circumstances indicate that the carrying amount of the title plant has been impaired. Impairment identifiers include a change in legal requirements or statutory practices, identification of obsolescence, and abandonment of the title plant, among other identifiers.

Intangible assets subject to amortization

The Company’s acquired intangible assets that are subject to amortization include core deposit intangibles, amortized on a straight line or accelerated basis, and a customer relationship intangible asset, amortized on an accelerated basis over average lives not to exceed 10 years.

TRANSFERS OF FINANCIAL ASSETS

Transfers of financial assets are accounted for as sales when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when 1) the assets have been isolated from the Company, 2) the transferee obtains the right, free of conditions that constrain it from taking advantage of that right, to pledge or exchange the transferred assets, and 3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity. Should the transfer not meet these three criteria, the transaction is treated as a secured financing.

INCOME TAXES

The Company and all subsidiaries file a consolidated federal income tax return on a calendar year basis. The Company files income tax returns in the U.S. federal jurisdiction and various state jurisdictions through IBERIABANK, IMC, LTC and their subsidiaries. In lieu of Louisiana state income tax, IBERIABANK is subject to the Louisiana bank shares tax, a portion of which is included in both non-interest expense and income tax expense in the Company’s consolidated statements of comprehensive income. With few exceptions, the Company is no longer subject to U.S. federal, state or local income tax examinations for years before 2011.

Deferred income tax assets and liabilities are determined using the liability (or balance sheet) method. Under this method, the net deferred tax asset or liability is determined based on the tax effects of the temporary differences between the book and tax bases of the various balance sheet assets and liabilities and gives current recognition to changes in tax rates and laws. The measurement of deferred tax assets is reduced, if necessary, by the amount of any tax benefits that, based on available evidence, are not expected to be realized.

The Company recognizes interest and penalties accrued related to unrecognized tax benefits, if applicable, in non-interest expense.

STOCK COMPENSATION PLANS

The Company issues stock options and restricted stock under various plans to directors, officers and other key employees. The Company accounts for its stock compensation plans in accordance with ASC Topics 718 and 505. Under those provisions, the Company has adopted a fair value based method of accounting for employee stock compensation plans, whereby compensation cost is measured at the grant date based on the value of the award and is recognized on a straight-line basis over the service period, which is usually the vesting period, taking into account retirement eligibility. For service awards with graded vesting, the Company recognizes compensation cost on a straight-line basis. As a result, compensation expense relating to stock options and restricted stock is reflected in net income as part of “Salaries and employee benefits” on the consolidated statements of comprehensive income for employees and “Professional services” for non-employee directors. The Company’s practice has been to grant options at no less than the fair market value of the stock at the grant date.

EARNINGS PER COMMON SHARE

Basic earnings per share represents income available to common shareholders divided by the weighted average number of common shares outstanding during the period. Diluted earnings per share reflect additional common shares that would have been outstanding if dilutive potential common shares, in the form of stock options, had been issued, as well as any adjustment to income that would result from the assumed issuance. Participating common shares issued by the Company relate to unvested outstanding restricted stock awards, the earnings allocated to which are used in determining income available to common shareholders under the two-class method. The two-class method allocates earnings for the period between common shareholders and other participating securities holders. The participating awards receiving dividends will be allocated the same amount of income as if they were outstanding shares.

TREASURY STOCK

The purchase of the Company’s common stock is recorded at cost. At the date of retirement or subsequent reissuance, treasury stock is reduced by the cost of such stock with differences recorded in additional paid-in capital or retained earnings, as applicable.

As of December 31, 2014, 1,809,497 shares of the Company’s common stock were classified as treasury stock in the consolidated financial statements. Effective January 1, 2015, companies incorporated in Louisiana became subject to the Louisiana Business Corporation Act (which replaced the Louisiana Business Corporation Law). Provisions of the Louisiana Business Corporation Act eliminate the concept of treasury stock and provide that shares reacquired by a company are to be treated as authorized but unissued shares. As a result of this change in law, for the consolidated financial statements beginning with the quarterly period ended March 31, 2015, the Company will begin to classify shares previously classified as treasury stock as a reduction to issued shares of common stock, and, accordingly, will adjust the stated value of common stock and paid in capital.

COMPREHENSIVE INCOME

Accounting principles generally require that recognized revenue, expenses, gains and losses be included in net income. Although certain changes in assets and liabilities, such as unrealized gains and losses on available for sale securities and cash flow hedges, are reported as a separate component of the shareholders’ equity section of the consolidated balance sheets, such items, along with net income, are components of comprehensive income.

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FAIR VALUE MEASUREMENTS

The Company estimates fair value based on the assumptions market participants would use when selling an asset or transferring a liability and characterizes such measurements within the fair value hierarchy based on the inputs used to develop those assumptions and measure fair value. The hierarchy requires the Company to maximize the use of observable inputs and minimize the use of unobservable inputs. The three levels of inputs used to measure fair value are as follows:

• Level 1 - Quoted prices in active markets for identical assets or liabilities.

• Level 2 - Observable inputs other than quoted prices included in Level 1, such as quoted prices for similar assets and liabilities in active markets; quoted prices for identical or similar assets and liabilities in markets that are not active; or other inputs that are observable or can be corroborated by observable market data.

• Level 3 - Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. This includes certain pricing models, discounted cash flow methodologies and similar techniques that use significant unobservable inputs.

A description of the valuation methodologies used for instruments measured at fair value follows, as well as the classification of such instruments within the valuation hierarchy.

Investment securities

Securities are classified within Level 1 where quoted market prices are available in an active market. Inputs include securities that have quoted prices in active markets for identical assets. If quoted market prices are unavailable, fair value is estimated using quoted prices of securities with similar characteristics, at which point the securities would be classified within Level 2 of the hierarchy.

Mortgage loans held for sale

Mortgage loans originated and held for sale are recorded at fair value under the fair value option, unless otherwise noted. When determining the fair value of loans held for sale, the Company obtains quotes or bids on these loans directly from the purchasing financial institutions (Level 2).

Impaired loans

Loans are measured for impairment using the methods permitted by ASC Topic 310. Fair value measurements are used in determining impairment using either the loan’s observable market price (Level 1), if available, or the fair value of the collateral if the loan is collateral dependent (Level 2). Measuring the impairment of loans using the present value of expected future cash flows, discounted at the loan’s effective interest rate, is not considered a fair value measurement. Fair value of the collateral is determined by appraisals or independent valuation.

Other real estate owned (OREO)

Fair values of OREO at December 31, 2014 are determined by sales agreement or appraisal, and costs to sell are based on estimation per the terms and conditions of the sales agreement or amounts commonly used in real estate transactions. Inputs include appraisal values on the properties or recent sales activity for similar assets in the property’s market, and thus OREO measured at fair value would be classified within Level 2 of the hierarchy. The Company included property write-downs of $3.8 million, $4.8 million, and $6.4 million in earnings as part of “Costs of OREO property, net” on the consolidated statements of comprehensive income for the years ended December 31, 2014, 2013, and 2012, respectively.

Derivative financial instruments

The Company enters into commitments to originate loans whereby the interest rate on the prospective loan is determined prior to funding. Rate locks on mortgage loans that are intended to be sold are considered to be derivatives. The Company offers its customers a certificate of deposit that provides the purchaser a guaranteed return of principal at maturity plus potential return, which allows the Company to identify a known cost of funds. The rate of return is based on an equity index, and as such represents an embedded derivative. Fair value of interest rate swaps, interest rate locks, forward sales commitments, and equity-linked written and purchased options are estimated using prices of financial instruments with similar characteristics, and thus are classified within Level 2 of the fair value hierarchy.

NOTE 2 – RECENT ACCOUNTING PRONOUNCEMENTS

ASU No. 2014-01

In January 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-01, Investments – Equity Method and Joint Ventures, in order to provide guidance on accounting for investments in flow-through limited liability entities that manage or invest in affordable housing projects that qualify for low-income housing tax credits (“LIHTC”). Through the Company’s investments in these entities, the Company receives tax credits and/or tax deductions from operating losses, which are allowable on the Company’s filed income tax returns over a 10-year period, subject to recapture over a 15-year period beginning with the first year the tax credits are earned.

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Under current U.S. generally accepted accounting principles (“U.S. GAAP”), the Company may elect to account for the investments using the effective yield method if certain conditions are met, and if they are not met, the investments are accounted for under either the equity method or the cost method. The Company currently accounts for its investments under the equity method. The provisions of ASU No. 2014-01 permit the Company to make an accounting policy election to account for its investments in LIHTC entities using the proportional amortization method if certain conditions are met. Under the proportional amortization method, the Company would amortize the initial cost of the investment in proportion to the tax credits and other tax benefits received and recognize the net investment performance in the Company’s consolidated statements of comprehensive income as a component of income tax expense or benefit. ASU No. 2014-01 would also require the Company to disclose information that enables users of the consolidated financial statements to understand the nature of the Company’s investments, the measurement of these investments, and their effect on the Company’s financial position and results of operations.

ASU No. 2014-01 is effective beginning with the Company’s first quarter ending March 31, 2015. When adopted, the provisions of ASU No. 2014-01 would be applied retrospectively to all financial statement periods presented. The Company is currently assessing the effect of the change, but does not anticipate that a change would be material to the financial condition, results of operations, or liquidity of the Company. The expanded disclosures required by ASU No. 2014-01 will be incorporated in the Company’s future consolidated financial statements upon adoption.

ASU No. 2014-04

In January 2014, the FASB issued ASU No. 2014-04, Receivables-Troubled Debt Restructurings by Creditors: Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans Upon Foreclosure, in order to clarify when a creditor should reclassify mortgage loans collateralized by residential real estate from their loan portfolio to other real estate owned (“OREO”) upon foreclosure. ASU No. 2014-04 clarifies that an in-substance repossession or foreclosure has occurred when either the creditor obtains legal title to the property or the borrower conveys all interest in the property to the creditor to satisfy the loan through completion of a deed in-lieu-of foreclosure or similar legal agreement. Additionally, ASU No. 2014-04 requires the Company to disclose both the amount of foreclosed residential real estate property held and the investment in consumer mortgage loans collateralized by residential real estate that are in the process of foreclosure.

ASU No. 2014-04 is effective beginning with the Company’s first quarter ending March 31, 2015. When adopting the provisions of ASU No. 2014-04, the Company could apply the provisions using either a prospective transition method or a modified retrospective method. The Company is currently assessing the effect that the adoption would have on its consolidated financial statements, but does not anticipate that adoption would materially affect the Company’s financial condition, results of operations, or liquidity. The expanded disclosures required by this ASU will be incorporated in the Company’s future consolidated financial statements upon adoption.

ASU No. 2014-09

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, which implements a common revenue standard and clarifies the principles used for recognizing revenue. The amendments in the ASU clarify that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. As part of that principle, the entity should identify the contract(s) with the customer, identify the performance obligation(s) of the contract, determine the transaction price, allocate that transaction price to the performance obligation(s) of the contract, and then recognize revenue when or as the entity satisfies the performance

obligation(s).

ASU No. 2014-09 is effective beginning with the Company’s first quarter ending March 31, 2017. The Company is currently assessing the effect, but does not expect that such adoption will have a significant impact on the Company’s consolidated financial statements.

ASU No. 2014-11

In June 2014, the FASB issued ASU No. 2014-11, Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosure, which will implement two accounting changes.

ASU No. 2014-11 changes the accounting for repurchase-to-maturity transactions to secured borrowing accounting. For repurchase financing arrangements, ASU No. 2014-11 requires separate accounting for a transfer of a financial asset executed contemporaneously with a repurchase agreement with the same counterparty, which will result in secured borrowing accounting for the repurchase agreement. The amendments in ASU No. 2014-11 also require certain disclosures for transfers of financial assets and repurchase agreements.

ASU No. 2014-11 is effective beginning with the Company’s first quarter ending March 31, 2015. Early adoption is not permitted. Changes will be applied as a cumulative-effect adjustment to retained earnings at the beginning of the adoption period. The disclosures of certain transactions accounted for as a sale is required to be presented beginning with the Company’s first quarter ending March 31, 2015. The company is currently assessing the effect, but does not expect that such adoption will have a significant impact on the Company’s consolidated financial statements.

ASU No. 2014-14

In August 2014, the FASB issued ASU No. 2014-14, Receivables - Troubled Debt Restructurings by Creditors: Classification of Certain

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Government-Guaranteed Mortgage Loans Upon Foreclosure, in order to clarify how creditors classify government-guaranteed mortgage loans upon foreclosure, including loans guaranteed by the Federal Housing Administration (“FHA”) of the U.S. Department of Housing and Urban Development and the U.S. Department of Veteran Affairs (“VA”).

ASU No. 2014-14 clarifies that a mortgage loan should be derecognized and that a separate other receivable be recognized upon foreclosure in creditor financial statements if 1) the loan has a government guarantee that is not separable from the loan before foreclosure, 2) at the time of foreclosure the creditor has the intent to convey the real estate property to the guarantor and make a claim on the guarantee, and 3) at the time of foreclosure, any amount of the claim that is determined on the basis of the fair value of the real estate is fixed. Upon foreclosure, the separate other receivable should be measured based on the amount of the loan balance, including principal and interest, expected to be recovered from the guarantor.

ASU No. 2014-14 is effective beginning with the Company’s first quarter ending March 31, 2015, using either a prospective transition method (application of the amendments of the ASU to foreclosures occurring after the adoption date) or modified retrospective transition method (by means of a cumulative-effect adjustment through a reclassification to a separate other receivable). The Company is currently assessing the effect but does not expect that such adoption will have a significant impact on the Company’s consolidated financial statements.

ASU No. 2014-15

In August 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements – Going Concern: Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern, which requires management to evaluate whether there are conditions or events that raise substantial doubt about an entity’s ability to continue as a going concern and to provide related footnote disclosures. ASU No. 2014-15 will require management to perform a going concern evaluation similar to the auditor’s evaluation required by standards issued by the Public Company Accounting Oversight Board (“PCAOB”) and American Institute of Public Accountants (“AICPA”).

ASU No. 2014-15 is effective for annual periods ending after December 15, 2016 and for annual and interim periods thereafter. Early application is permitted. The Company does not expect that such adoption will have a significant impact on the Company’s consolidated financial statements.

ASU No. 2014-16

In November 2014, the FASB issued ASU No. 2014-16, Derivatives and Hedging: Determining Whether the Host Contract in a Hybrid Financial Instrument Issued in the Form of a Share Is More Akin to Debt or to Equity, which requires management to assess each existing hybrid financial instrument issued in the form of a share to determine whether any of those hybrid financial instruments contain one or more embedded derivative features. The guidance clarifies that an entity should consider the economic characteristics and risks of the entire hybrid financial instrument, including the embedded derivative being evaluated for bifurcation, in evaluating the nature of the host contract.

ASU No. 2014-16 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. Early adoption, including adoption in an interim period, is permitted. If an entity early adopts the amendments in an interim period, any adjustment shall be reflected as of the beginning of the fiscal year that includes that interim period. The Company does not expect that such adoption will have a significant impact on the Company’s consolidated financial statements.

ASU No. 2014-17

In November 2014, the FASB issued ASU No. 2014-17, Business Combinations: Pushdown Accounting, which provides an acquired entity guidance on whether and at what threshold it can apply pushdown accounting in its separate financial statements upon occurrence of an event in which an acquirer obtains control of the acquired entity. If an acquired entity elects the option to apply pushdown accounting in its separate financial statements, it should disclose information in the current reporting period that enables the users of financial statements to evaluate the effect of pushdown accounting.

ASU No. 2014-17 became effective on November 18, 2014. After the effective date, an acquired entity can make an election to apply the guidance to future change-in control events or to its most recent change-in-control event. If the financial statements for the period in which the most recent change-in-control event occurred have already been issued or made available to be issued, the application of ASU No. 2014-17 would be a change in accounting principle. Adoption will not have a significant impact on the Company’s consolidated financial statements.

NOTE 3 –EARNINGS PER SHARE

Share-based payment awards that entitle holders to receive non-forfeitable dividends before vesting are considered participating securities and thus included in the calculation of basic earnings per share under the two-class method.

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The following table presents the calculation of basic and diluted earnings per share for the periods indicated.

	For the Years Ended December 31
(In thousands, except per share data)	2014			2013			2012
Income available to common shareholders	$	105,450		$	65,103		$	76,395
Earnings to unvested restricted stock		(1,652	)		(1,206	)		(1,443	)
Earnings to common shareholders - basic		103,798			63,897			74,952
Earnings reallocated to unvested restricted stock		(33	)		(3	)		6
Earnings to common shareholders - diluted	$	103,765		$	63,894		$	74,958
Weighted average shares outstanding - basic		31,307			29,052			28,901
Potential common shares		126			53			57
Weighted average shares outstanding - diluted		31,433			29,105			28,958
Weighted average shares outstanding - unvested restricted stock		518			553			553
Earnings per common share - basic	$	3.32		$	2.20		$	2.59
Earnings per common share - diluted		3.30			2.20			2.59
Earnings per unvested restricted stock share - basic		3.19			2.18			2.61
Earnings per unvested restricted stock share - diluted		3.13			2.18			2.60

Additional information on the Company’s basic earnings per common share is shown in the following table.

	For the Years Ended December 31
(Dollars in thousands, except per share data)	2014		2013		2012
Distributed earnings to common shareholders	$	43,623	$	39,685	$	39,349
Undistributed earnings to common shareholders		60,175		24,212		35,603
Total earnings to common shareholders	$	103,798	$	63,897	$	74,952
Distributed earnings to unvested restricted stock	$	694	$	749	$	758
Undistributed earnings to unvested restricted stock		958		457		685
Total earnings allocated to unvested restricted stock	$	1,652	$	1,206	$	1,443
Distributed earnings per common share	$	1.40	$	1.37	$	1.36
Undistributed earnings per common share		1.92		0.83		1.23
Total earnings per common share	$	3.32	$	2.20	$	2.59
Distributed earnings per unvested restricted stock share	$	1.34	$	1.35	$	1.37
Undistributed earnings per unvested restricted stock share		1.85		0.83		1.24
Total earnings per unvested restricted stock share	$	3.19	$	2.18	$	2.61

For the years ended December 31, 2014, 2013, and 2012, the calculations for basic shares outstanding exclude the weighted average shares owned by the Recognition and Retention Plan (“RRP”) of 625,555, 642,008, and 612,097, respectively, and are adjusted for the weighted average shares in treasury stock of 1,879,440, 2,223,306, and 1,964,825, respectively.

The effects from the assumed exercises of 13,101, 483,696, and 752,188 stock options were not included in the computation of diluted earnings per share for years ended December 31, 2014, 2013, and 2012, respectively, because such amounts would have had an antidilutive effect on earnings per common share.

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NOTE 4 –ACQUISITION AND DISPOSITION ACTIVITY

Completed Acquisitions

Acquisition of Certain Assets and Liabilities of Trust One Bank

On January 17, 2014, IBERIABANK acquired certain assets and assumed certain liabilities of the Memphis, Tennessee operations of Trust One Bank, a division of Synovus Bank. Under terms of the agreement, IBERIABANK received $91.6 million in cash to acquire four Trust One-Memphis branches in the Memphis, Tennessee market, which resulted in goodwill of $8.6 million. With this acquisition, IBERIABANK expanded its presence in the Memphis, Tennessee MSA through the addition of four branches and an experienced in-market team that enhances IBERIABANK’s ability to compete in that market.

Acquisition of Teche Holding Company

On May 31, 2014, the Company acquired Teche, the holding company of Teche Federal Bank, a New Iberia, Louisiana-based commercial bank servicing south Louisiana. Under terms of the agreement, for each share of Teche stock outstanding, Teche shareholders received 1.162 shares of the Company’s common stock, as well as a cash payment for any fractional share and unexercised options to purchase Teche common stock. The Company acquired all of the outstanding common stock of the former Teche shareholders for total consideration of $156.7 million, which resulted in goodwill of $80.4 million, as shown in the table below. With this acquisition, IBERIABANK expanded its presence in the Acadiana region of Louisiana through the addition of 20 branches and an experienced in-market team that enhances IBERIABANK’s ability to compete in that market. The Company projects cost savings will be recognized in future periods through the elimination of redundant operations. The following summarizes consideration paid and a preliminary allocation of purchase price to net assets acquired.

(Dollars in thousands)	Number of Shares		Amount
Equity consideration
Common stock issued		2,498,007	$	156,026
Total equity consideration				156,026
Non-Equity consideration
Cash				714
Total consideration paid				156,740
Fair value of net assets assumed including identifiable intangible assets				76,311
Goodwill			$	80,429

Acquisition of First Private Holdings, Inc.

On June 30, 2014, the Company acquired First Private, the holding company of First Private Bank of Texas, a Dallas, Texas-based commercial bank with four branch locations, including two mobile branches. Under terms of the agreement, for each share of First Private stock outstanding, First Private shareholders received 0.27 of a share of the Company’s common stock, as well as a cash payment for any fractional share. The Company acquired all of the outstanding common stock of the former First Private shareholders for total consideration of $58.6 million, which resulted in goodwill of $26.3 million, as shown in the table below. With this acquisition, IBERIABANK expanded its presence into the Dallas, Texas MSA through the addition of branches and an experienced in-market team. The Company projects cost savings will be recognized in future periods through the elimination of redundant operations. The following summarizes consideration paid and a preliminary allocation of purchase price to net assets acquired.

(Dollars in thousands)	Number of Shares		Amount
Equity consideration
Common stock issued		847,509	$	58,639
Total equity consideration				58,639
Non-Equity consideration
Cash				1
Total consideration paid				58,640
Fair value of net assets assumed including identifiable intangible assets				32,387
Goodwill			$	26,253

The Company accounted for the aforementioned business combinations under the acquisition method in accordance with ASC Topic 805. Accordingly, the purchase price is allocated to the fair value of the assets acquired and liabilities assumed as of the date of acquisition. The following purchase price allocations on these acquisitions are preliminary and will be finalized upon the receipt of final valuations on certain assets and liabilities. Upon receipt of final fair value estimates, which must be within one year of the acquisition dates, the Company will make any final adjustments to the purchase price allocation and retrospectively adjust any goodwill recorded. Material adjustments to acquisition date

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estimated fair values would be recorded in the period in which the acquisition occurred, and as a result, previously reported results are subject to change. Information regarding the Company’s loan discount and related deferred tax asset, core deposit intangible asset and related deferred tax liability, as well as income taxes payable and the related deferred tax balances recorded in the acquisitions may be adjusted as the Company refines its estimates. Determining the fair value of assets and liabilities, particularly illiquid assets and liabilities, is a complicated process involving significant judgment regarding estimates and assumptions used to calculate estimated fair value. Fair value adjustments based on updated estimates could materially affect the goodwill recorded on the acquisition. The Company may incur losses on the acquired loans that are materially different from losses the Company originally projected.

The acquired assets and liabilities, as well as the preliminary adjustments to record the assets and liabilities at their estimated fair values, are presented in the following tables.

Trust One- Memphis	As Acquired		Preliminary Fair Value Adjustments			As recorded by IBERIABANK
(Dollars in thousands)
Assets
Cash and cash equivalents	$	92,060	$	—		$	92,060
Loans		88,179		(1,726	) (1)		86,453
Other real estate owned		1,325		—			1,325
Core deposit intangible		—		2,597	(2)		2,597
Other assets		368		—			368
Total Assets	$	181,932	$	871		$	182,803
Liabilities
Interest-bearing deposits	$	164,942	$	—		$	164,942
Non-interest-bearing deposits		26,373		—			26,373
Deferred tax liability		—		—			—
Other liabilities		84		—			84
Total Liabilities	$	191,399	$	—		$	191,399

Explanation of certain fair value adjustments:

⁽¹⁾  The amount represents the adjustment of the book value of Trust One-Memphis loans to their estimated fair value based on current interest rates and expected cash flows, which includes estimates of expected credit losses inherent in the portfolio.

⁽²⁾  The amount represents the fair value of the core deposit intangible asset created in the acquisition.

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Teche	As Acquired		Preliminary Fair Value Adjustments			As recorded by IBERIABANK
(Dollars in thousands)
Assets
Cash and cash equivalents	$	71,611	$	—		$	71,611
Investment securities		24,077		1,092	(1)		25,169
Loans		716,327		(15,869	) (2)		700,458
Other real estate owned		329		(153	) (3)		176
Core deposit intangible		—		7,440	(4)		7,440
Deferred tax asset		1,057		4,835	(5)		5,892
Other assets		56,730		(5,653	) (6)		51,077
Total Assets	$	870,131	$	(8,308	)	$	861,823
Liabilities
Interest-bearing deposits	$	520,446	$	902	(7)	$	521,348
Non-interest-bearing deposits		118,256		—			118,256
Borrowings		134,228		6,304	(8)		140,532
Other liabilities		5,376		—			5,376
Total Liabilities	$	778,306	$	7,206		$	785,512

Explanation of certain fair value adjustments:

⁽¹⁾  The amount represents the adjustment of the book value of Teche’s investments to their estimated fair value based on fair values on the date of acquisition.

⁽²⁾  The amount represents the adjustment of the book value of Teche loans to their estimated fair value based on current interest rates and expected cash flows, which includes estimates of expected credit losses inherent in the portfolio.

⁽³⁾  The amount represents the adjustment to the book value of Teche’s OREO to their estimated fair value on the date of acquisition.

⁽⁴⁾  The amount represents the fair value of the core deposit intangible asset created in the acquisition.

⁽⁵⁾  The amount represents the deferred tax asset recognized on the fair value adjustment of Teche acquired assets and assumed liabilities.

⁽⁶⁾  The amount represents the adjustment of the book value of Teche’s property, equipment, and other assets to their estimated fair value at the acquisition date based on their appraised value, as well as the fair value of mortgage servicing rights created in the acquisition.

⁽⁷⁾  The adjustment is necessary because the weighted average interest rate of Teche’s deposits exceeded the cost of similar funding at the time of acquisition. The fair value adjustment will be amortized to reduce future interest expense over the life of the portfolio, which is estimated at 85 months.

⁽⁸⁾  The adjustment represents the adjustment of the book value of Teche’s borrowings to their estimated fair value based on current interest rates and the credit characteristics inherent in the liability.

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First Private	As Acquired		Preliminary Fair Value Adjustments			As recorded by IBERIABANK
(Dollars in thousands)
Assets
Cash and cash equivalents	$	26,621	$	—		$	26,621
Investment securities		18,920		297	(1)		19,217
Loans		300,177		(910	) (2)		299,267
Other real estate owned		—		—			—
Core deposit intangible		—		506	(3)		506
Deferred tax asset		530		122	(4)		652
Other assets		5,148		—			5,148
Total Assets	$	351,396	$	15		$	351,411
Liabilities
Interest-bearing deposits	$	261,713	$	220	(5)	$	261,933
Non-interest-bearing deposits		50,334		—			50,334
Borrowings		6,451		—			6,451
Other liabilities		306		—			306
Total Liabilities	$	318,804	$	220		$	319,024

Explanation of certain fair value adjustments:

⁽¹⁾  The amount represents the adjustment of the book value of First Private’s investments to their estimated fair value based on fair values on the date of acquisition.

⁽²⁾  The amount represents the adjustment of the book value of First Private loans to their estimated fair value based on current interest rates and expected cash flows, which includes estimates of expected credit losses inherent in the portfolio.

⁽³⁾  The amount represents the fair value of the core deposit intangible asset created in the acquisition.

⁽⁴⁾  The amount represents the deferred tax asset recognized on the fair value adjustment of First Private acquired assets and assumed liabilities.

⁽⁵⁾  The adjustment is necessary because the weighted average interest rate of First Private’s deposits exceeded the cost of similar funding at the time of acquisition. The fair value adjustment will be amortized to reduce future interest expense over the life of the portfolio, which is estimated at 39 months.

Acquisitions of LTC

On February 24, 2014, the Company’s subsidiary, LTC, acquired The Title Company, LLC. Under terms of the agreement, LTC paid $0.4 million in cash to acquire a title office in Baton Rouge, Louisiana, which resulted in goodwill of $0.2 million.

On May 1, 2014, LTC acquired Louisiana Abstract and Title, LLC. Under terms of the agreement, LTC paid $0.2 million in cash to acquire a title office in Shreveport, Louisiana, which resulted in goodwill of $0.2 million. In addition, the agreement provides for potential additional cash consideration based on earnings over a four-year period after the acquisition.

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The acquisitions were accounted for under the acquisition method of accounting in accordance with ASC Topic 805. Purchased assets were recorded at their acquisition date fair values. Identifiable intangible assets were recorded at fair value. Because the consideration paid, including contingent consideration, was greater than the fair value of the acquired net assets, the Company recorded goodwill as part of the acquisitions. The goodwill recognized was the result of LTC’s expanded presence into the Baton Rouge and Shreveport Louisiana MSAs and experienced in-market teams that enhance its ability to compete in those markets. As part of the acquisitions, LTC also acquired or created the following other assets:

(Dollars in thousands)	The Title Company LLC		Louisiana Abstract and Title LLC
Goodwill	$	221	$	155
Non-compete agreement		63		100
Title plant		14		9
Other intangible assets		75		130
Other assets		3		6
Total Assets	$	376	$	400

Pending Acquisitions

Acquisition of Florida Bank Group, Inc.

During the fourth quarter of 2014, the Company announced the signing of a definitive agreement pursuant to which IBERIABANK will acquire Florida Bank Group, Inc. (“Florida Bank Group”). The proposed acquisition of Florida Bank Group has been approved by the Board of Directors of each company, Florida Bank Group’s shareholders, and the Company’s regulators, and closed on February 28, 2015.

Under the terms of the agreement, Florida Bank Group shareholders will receive a combination of cash and shares of the Company’s common stock. Florida Bank Group shareholders will receive cash equal to $7.81 per share of then outstanding Florida Bank Group common stock, including shares of preferred stock that will convert to common shares in the acquisition. Each Florida Bank Group common share will be exchanged for 0.149 share of the Company’s common stock. All unexercised Florida Bank Group stock options, whether or not vested, will be cashed out.

Acquisition of Old Florida Bancshares, Inc.

During the fourth quarter of 2014, the Company announced the signing of a definitive agreement pursuant to which IBERIABANK will acquire Old Florida Bancshares, Inc. (“Old Florida”), holding company of Old Florida Bank and New Traditions Bank. The proposed acquisition has been approved by the Board of Directors of each company, Old Florida’s shareholders, and the Company’s regulators, and is expected to close on March 31, 2015.

Under the terms of the agreement, Old Florida shareholders will receive 0.34 share of the Company’s common stock for each of the Old Florida common stock shares outstanding, subject to certain market price adjustments provided for in the agreement. All unexercised Old Florida stock options, whether or not vested, will be cashed out.

Acquisition of Georgia Commerce Bancshares, Inc.

During the fourth quarter of 2014, the Company announced the signing of a definitive agreement pursuant to which IBERIABANK will acquire Georgia Commerce Bancshares, Inc. (“Georgia Commerce”), holding company of Georgia Commerce Bank. The proposed acquisition has been approved by the Board of Directors of each company and the Company’s regulators and is expected to close in the first half of 2015, subject to customary closing conditions, including the receipt of the approval of Georgia Commerce’s shareholders.

Supplemental unaudited pro forma information

The following unaudited pro forma information for the year ended December 31, 2013 reflects the Company’s estimated consolidated results of operations as if the acquisitions of Trust One-Memphis, Teche, and First Private occurred at January 1, 2013, unadjusted for potential cost savings and preliminary purchase price adjustments.

(Dollars in thousands, except per share data)	2013		2012
Interest and non-interest income	$	669,607	$	687,279
Net income		74,624		86,473
Earnings per share - basic		2.26		2.63
Earnings per share - diluted		2.26		2.63

The Company’s consolidated financial statements as of and for the year ended December 31, 2014 include the operating results of the acquired assets and assumed liabilities for the days subsequent to the respective acquisition dates. Due to the system conversion of the acquired entities throughout the current year and subsequent integration of the operating activities of the acquired branches into existing Company markets, historical reporting for the former Trust One-Memphis, Teche, and First Private branches is impracticable and thus disclosure of the revenue from the assets acquired and income before income taxes is impracticable for the period subsequent to acquisition.

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Under the terms of the agreement, Georgia Commerce shareholders will receive 0.6134 share of the Company’s common stock for each of the Georgia Commerce common stock shares outstanding, subject to certain market price adjustments provided for in the agreement. All unexercised Georgia Commerce stock options, whether or not vested, will be cashed out.

Branch Dispositions

In 2012, the Company closed ten branches as part of its ongoing business strategy, which includes a periodic review of its branch network to maximize shareholder return. In 2013, the Company closed or consolidated an additional 14 branches. As part of these branch closures, the Company incurred various disposal costs during the years ended December 31, 2013 and 2012, including personnel termination costs, contract termination costs, and fixed asset disposals. The following table shows the costs the Company incurred that are included in its consolidated statements of comprehensive income for the years indicated. Costs associated with branch dispositions for the year ended December 31, 2014 were immaterial.

	For the Years Ended December 31
(Dollars in thousands)	2013		2012
Employee termination	$	299	$	477
Accelerated depreciation		1,033		576
Contract termination		659		20
Impairment		4,941		2,743
	$	6,932	$	3,816

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NOTE 5 – INVESTMENT SECURITIES

The amortized cost and fair values of investment securities, with gross unrealized gains and losses, consist of the following:

	December 31, 2014
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	317,386	$	1,700	$	(3,533	)	$	315,553
Obligations of state and political obligations		86,513		3,679		(2	)		90,190
Mortgage-backed securities		1,741,917		16,882		(7,184	)		1,751,615
Other securities		1,460		35		—			1,495
Total securities available for sale	$	2,147,276	$	22,296	$	(10,719	)	$	2,158,853
Securities held to maturity:
U.S. Government-sponsored enterprise obligations	$	10,000	$	88	$	—		$	10,088
Obligations of state and political obligations		77,597		3,153		(145	)		80,605
Mortgage-backed securities		29,363		151		(726	)		28,788
Total securities held to maturity	$	116,960	$	3,392	$	(871	)	$	119,481
	December 31, 2013
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	406,092	$	1,382	$	(11,913	)	$	395,561
Obligations of state and political obligations		105,300		2,435		(256	)		107,479
Mortgage-backed securities		1,450,194		10,031		(27,947	)		1,432,278
Other securities		1,460		19		—			1,479
Total securities available for sale	$	1,963,046	$	13,867	$	(40,116	)	$	1,936,797
Securities held to maturity:
U.S. Government-sponsored enterprise obligations	$	34,478	$	484	$	—		$	34,962
Obligations of state and political obligations		84,290		1,463		(1,624	)		84,129
Mortgage-backed securities		35,341		258		(2,124	)		33,475
Total securities held to maturity	$	154,109	$	2,205	$	(3,748	)	$	152,566

At December 31, 2014, the Company’s exposure to two investment security issuers individually exceeded 10% of shareholders’ equity:

(Dollars in thousands)	Amortized Cost		Market Value
Federal National Mortgage Association (Fannie Mae)	$	1,220,841	$	1,226,654
Federal Home Loan Mortgage Corporation (Freddie Mac)		707,592		706,514
	$	1,928,433	$	1,933,168

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Securities with carrying values of $1.4 billion and $1.5 billion were pledged to secure public deposits and other borrowings at December 31, 2014 and 2013, respectively.

Information pertaining to securities with gross unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous loss position, is as follows:

	December 31, 2014
	Less Than Twelve Months					Over Twelve Months					Total
	Gross			Estimated		Gross			Estimated		Gross			Estimated
	Unrealized			Fair		Unrealized			Fair		Unrealized			Fair
(Dollars in thousands)	Losses			Value		Losses			Value		Losses			Value
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	—		$	—	$	(3,533	)	$	240,498	$	(3,533	)	$	240,498
Obligations of state and political obligations		(2	)		185		—			—		(2	)		185
Mortgage-backed securities		(1,189	)		304,686		(5,995	)		294,549		(7,184	)		599,235
Total securities available for sale	$	(1,191	)	$	304,871	$	(9,528	)	$	535,047	$	(10,719	)	$	839,918
Securities held to maturity:
Obligations of state and political obligations	$	(9	)	$	2,287	$	(136	)	$	8,590	$	(145	)	$	10,877
Mortgage-backed securities		—			—		(726	)		20,812		(726	)		20,812
Total securities held to maturity	$	(9	)	$	2,287	$	(862	)	$	29,402	$	(871	)	$	31,689
	December 31, 2013
	Less Than Twelve Months					Over Twelve Months					Total
	Gross			Estimated		Gross			Estimated		Gross			Estimated
	Unrealized			Fair		Unrealized			Fair		Unrealized			Fair
(Dollars in thousands)	Losses			Value		Losses			Value		Losses			Value
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	(11,764	)	$	298,515	$	(149	)	$	5,515	$	(11,913	)	$	304,030
Obligations of state and political obligations		(30	)		2,415		(226	)		1,047		(256	)		3,462
Mortgage-backed securities		(23,749	)		864,899		(4,198	)		81,870		(27,947	)		946,769
Total securities available for sale	$	(35,543	)	$	1,165,829	$	(4,573	)	$	88,432	$	(40,116	)	$	1,254,261
Securities held to maturity:
Obligations of state and political obligations	$	(1,181	)	$	29,355	$	(443	)	$	6,240	$	(1,624	)	$	35,595
Mortgage-backed securities		(952	)		12,913		(1,172	)		11,616		(2,124	)		24,529
Total securities held to maturity	$	(2,133	)	$	42,268	$	(1,615	)	$	17,856	$	(3,748	)	$	60,124

The Company assessed the nature of the losses in its portfolio as of December 31, 2014 and 2013 to determine if there are losses that should be deemed other-than-temporary. In its analysis of these securities, management considered numerous factors to determine whether there were instances where the amortized cost basis of the debt securities would not be fully recoverable, including, but not limited to:

• The length of time and extent to which the estimated fair value of the securities was less than their amortized cost,

• Whether adverse conditions were present in the operations, geographic area, or industry of the issuer,

• The payment structure of the security, including scheduled interest and principal payments, including the issuer’s failures to make scheduled payments, if any, and the likelihood of failure to make scheduled payments in the future,

• Changes to the rating of the security by a rating agency, and

• Subsequent recoveries or additional declines in fair value after the balance sheet date.

Management believes it has considered these factors, as well as all relevant information available, when determining the expected future cash flows of the securities in question. Except for the particular municipal bond discussed below, in each instance, management has

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determined the cost basis of the securities would be fully recoverable. Management also has the intent to hold debt securities until their maturity or anticipated recovery if the security is classified as available for sale. In addition, management does not believe the Company will be required to sell debt securities before the anticipated recovery of the amortized cost basis of the security.

At December 31, 2014, 112 debt securities had unrealized losses of 1.31% of the securities’ amortized cost basis. At December 31, 2013, 207 debt securities had unrealized losses of 3.23% of the securities’ amortized cost basis. The unrealized losses for each of the securities related to market interest rate changes. Additional information on securities that have been in a continuous loss position for over twelve months at December 31 is presented in the following table.

(Dollars in thousands)	2014		2013
Number of securities
Issued by Fannie Mae, Freddie Mac, or Ginnie Mae		66		20
Issued by political subdivisions		5		5
		71		25
Amortized Cost Basis
Issued by Fannie Mae, Freddie Mac, or Ginnie Mae	$	566,113	$	104,520
Issued by political subdivisions		8,727		7,956
	$	574,840	$	112,476
Unrealized Loss
Issued by Fannie Mae, Freddie Mac, or Ginnie Mae	$	10,254	$	5,519
Issued by political subdivisions		136		669
	$	10,390	$	6,188

The Fannie Mae, Freddie Mac, and Ginnie Mae securities are rated AA+ by S&P and Aaa by Moodys. Five of the securities in a continuous loss position for over twelve months were issued by political subdivisions. The securities issued by political subdivisions have credit ratings by S&P ranging from A+ to AAA and credit ratings from Moody’s ranging from A2 to Aaa.

Prior to 2012, management assessed the operating environment of a bond issuer as adverse and concluded that the Company had one unrated revenue municipal bond that warranted an other-than-temporary impairment charge. The specific impairment was related to the loss of the contracted revenue source required for bond repayment. The Company determined the impairment charge using observable market data for similar assets, including third party valuation of the security, as well as information from unobservable inputs, including its best estimate of the recoverability of the amortized cost of the security as outlined above. The Company recorded total impairment of 50% of the par value of the bond and provided a fair value of the bond that was consistent with current market pricing. During the third quarter of 2014, the Company sold the municipal bond and recorded a gain of $0.6 million in the Company’s consolidated statements of comprehensive income for the year ended December 31, 2014. The following table reflects activity during the years ended December 31, 2014, 2013, and 2012 related to credit losses on the other-than-temporarily impaired investment security where a portion of the unrealized loss was recognized in comprehensive income.

(Dollars in thousands)	2014			2013			2012
Balance at beginning of period	$	(1,273	)	$	(1,273	)	$	(1,273	)
Credit losses on securities not previously considered other-than-temporarily impaired		—			—			—
Credit losses on securities for which OTTI was previously recognized		—			—			—
Reduction for securities sold/settled during the period		1,273			—			—
Balance at end of period	$	—		$	(1,273	)	$	(1,273	)

As a result of the Company’s analysis, no declines in the estimated fair value of the Company’s investment securities were deemed to be other-than-temporary at December 31, 2014 or 2013.

The amortized cost and estimated fair value of investment securities by maturity at December 31, 2014 are shown in the following table. Securities are classified according to their contractual maturities without consideration of principal amortization, potential prepayments or call options. Accordingly, actual maturities may differ from contractual maturities. Weighted average yields are calculated on the basis of the yield to maturity based on the amortized cost of each security.

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	Securities Available for Sale							Securities Held to Maturity
(Dollars in thousands)	Weighted Average Yield			Amortized Cost		Estimated Fair Value		Weighted Average Yield			Amortized Cost		Estimated Fair Value
Within one year or less		1.54	%	$	14,643	$	14,764		2.65	%	$	10,000	$	10,088
One through five years		1.73			241,231		241,796		2.78			13,858		14,191
After five through ten years		2.15			425,233		429,973		3.10			20,945		21,729
Over ten years		2.20			1,466,169		1,472,320		2.86			72,157		73,473
		2.13	%	$	2,147,276	$	2,158,853		2.87	%	$	116,960	$	119,481

The following is a summary of realized gains and losses from the sale of securities classified as available for sale. Gains or losses on securities sold are recorded on the trade date, using the specific identification method.

	Years Ended December 31
(Dollars in thousands)	2014			2013			2012
Realized gains	$	863		$	2,387		$	3,754
Realized losses		(92	)		(110	)		(15	)
	$	771		$	2,277		$	3,739

In addition to the gains above, the Company realized certain immaterial gains on calls of held to maturity securities.

Other Equity Securities

The Company included the following securities in “Other assets” on the consolidated balance sheets at December 31:

(Dollars in thousands)	2014		2013
Federal Home Loan Bank (FHLB) stock	$	38,476	$	24,369
Federal Reserve Bank (FRB) stock		34,348		28,098
Other investments		1,306		1,306
	$	74,130	$	53,773

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NOTE 6 – LOANS

Loans consist of the following, segregated into non-covered and covered loans, for the periods indicated:

	December 31, 2014
	Non-covered loans
(Dollars in thousands)	Legacy Loans		Acquired Loans		Covered Loans(1)		Total
Commercial loans:
Real estate	$	3,718,058	$	497,949	$	189,126	$	4,405,133
Business		3,284,140		93,549		31,260		3,408,949
		7,002,198		591,498		220,386		7,814,082
Residential mortgage loans:
Residential 1-4 family		495,638		424,579		128,024		1,048,241
Construction / Owner Occupied		32,056		—		—		32,056
		527,694		424,579		128,024		1,080,297
Consumer and other loans:
Home equity		1,290,976		217,699		92,430		1,601,105
Indirect automobile		396,766		392		—		397,158
Other		451,080		93,618		3,704		548,402
		2,138,822		311,709		96,134		2,546,665
Total	$	9,668,714	$	1,327,786	$	444,544	$	11,441,044
	December 31, 2013
	Non-covered loans
(Dollars in thousands)	Legacy Loans		Acquired Loans		Covered Loans		Total
Commercial loans:
Real estate	$	3,134,904	$	345,069	$	387,332	$	3,867,305
Business		2,906,051		53,037		37,025		2,996,113
		6,040,955		398,106		424,357		6,863,418
Residential mortgage loans:
Residential 1-4 family		404,922		18,135		154,025		577,082
Construction / Owner Occupied		9,450		—		—		9,450
		414,372		18,135		154,025		586,532
Consumer and other loans:
Home equity		1,101,227		53,443		137,122		1,291,792
Indirect automobile		373,383		1,853		—		375,236
Other		358,384		12,368		4,289		375,041
		1,832,994		67,664		141,411		2,042,069
Total	$	8,288,321	$	483,905	$	719,793	$	9,492,019

(1) Included as covered loans at December 31, 2014 is $174.7 million of assets whose reimbursable loss periods ended as of January 1, 2015.

In 2009, the Company acquired substantially all of the assets and liabilities of CapitalSouth Bank (“CSB”), and certain assets, deposits, and other liabilities of Orion Bank (“Orion”) and Century Bank (“Century”). In 2010, the Company acquired certain assets and assumed certain deposits and other liabilities of Sterling Bank (“Sterling”). Substantially all of the loans and foreclosed real estate that were acquired in these transactions are covered by loss sharing agreements between the FDIC and IBERIABANK, which afford IBERIABANK loss protection. Refer to Note 8 for additional information regarding the Company’s loss sharing agreements.

Because of the loss protection provided by the FDIC, the risks associated with CSB, Orion, Century, and Sterling covered loans and foreclosed real estate are significantly different from those assets not covered under the loss share agreements. Accordingly, the Company presents loans currently indemnified as “covered loans” and loans that are not currently indemnified as “non-covered loans.”

Deferred loan origination fees were $20.6 million and $18.6 million and deferred loan expenses were $9.4 million and $7.6 million at December 31, 2014 and 2013, respectively. In addition to loans issued in the normal course of business, the Company considers overdrafts on customer deposit accounts to be loans and reclassifies these overdrafts as loans in its consolidated balance sheets. At December 31, 2014 and 2013, overdrafts of $5.6 million and $3.1 million, respectively, have been reclassified to loans.

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Loans with carrying values of $3.1 billion and $2.3 billion were pledged to secure public deposits and other borrowings at December 31, 2014 and 2013, respectively.

Non-covered Loans

The following tables provide an analysis of the aging of non-covered loans as of December 31, 2014 and 2013. Because of the difference in accounting for acquired loans, the tables below further segregate the Company’s non-covered loans between legacy loans and acquired loans. For purposes of the following tables, subprime mortgage loans are defined as the Company’s mortgage loans that have borrower FICO scores that are less than 620 at the time of origination or were purchased outside of a business combination.

	December 31, 2014
	Legacy loans
	Past Due (1)								Current		Total Legacy Loans, Net of Unearned Income		Recorded Investment > 90 days and Accruing
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total
Commercial real estate - Construction	$	507	$	—	$	69	$	576	$	483,663	$	484,239	$	—
Commercial real estate - Other		11,799		148		6,883		18,830		3,214,989		3,233,819		—
Commercial business		1,589		1,860		3,228		6,677		3,277,463		3,284,140		200
Residential mortgage - Prime		1,389		2,616		11,305		15,310		392,900		408,210		538
Residential mortgage - Subprime		—		—		3,595		3,595		115,889		119,484		—
Consumer - Home equity		4,096		595		7,420		12,111		1,278,865		1,290,976		16
Consumer - Indirect automobile		2,447		396		1,419		4,262		392,504		396,766		—
Consumer - Credit card		253		163		1,032		1,448		71,297		72,745		—
Consumer - Other		1,285		424		773		2,482		375,853		378,335		—
Total	$	23,365	$	6,202	$	35,724	$	65,291	$	9,603,423	$	9,668,714	$	754
	December 31, 2013
	Legacy loans
	Past Due (1)								Current		Total Legacy Loans, Net of Unearned Income		Recorded Investment > 90 days and Accruing
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total
Commercial real estate - Construction	$	—	$	—	$	1,803	$	1,803	$	381,292	$	383,095	$	—
Commercial real estate - Other		6,098		5,630		7,650		19,378		2,732,431		2,751,809		2
Commercial business		2,117		423		15,020		17,560		2,888,491		2,906,051		—
Residential mortgage - Prime		1,104		852		9,684		11,640		286,167		297,807		1,073
Residential mortgage - Subprime		—		—		1,626		1,626		114,939		116,565		—
Consumer - Home equity		1,956		569		6,808		9,333		1,091,894		1,101,227		—
Consumer - Indirect automobile		1,427		293		1,275		2,995		370,388		373,383		—
Consumer - Credit card		266		92		411		769		62,873		63,642		—
Consumer - Other		458		106		485		1,049		293,693		294,742		—
Total	$	13,426	$	7,965	$	44,762	$	66,153	$	8,222,168	$	8,288,321	$	1,075

⁽¹⁾  Past due loans greater than 90 days include all loans on nonaccrual status, regardless of past due status, as of the period indicated. Nonaccrual loans are presented separately in the “Nonaccrual Loans” section below.

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	December 31, 2014
	Non-covered acquired loans
	Past Due (1)								Current		Discount/ Premium			Total Non-covered Acquired Loans, Net of Unearned Income		Recorded Investment > 90 days and Accruing
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total
Commercial real estate - Construction	$	2,740	$	57	$	1,284	$	4,081	$	26,667	$	(1,170	)	$	29,578	$	1,284
Commercial real estate - Other		4,419		840		26,480		31,739		475,751		(39,119	)		468,371		26,376
Commercial business		2,106		70		1,635		3,811		94,962		(5,224	)		93,549		1,635
Residential mortgage - Prime		152		2,367		9,339		11,858		418,552		(5,831	)		424,579		8,087
Consumer - Home equity		649		385		8,774		9,808		216,310		(8,419	)		217,699		8,383
Consumer - Indirect automobile		13		17		9		39		393		(40	)		392		9
Consumer - Other		1,458		113		1,949		3,520		94,315		(4,217	)		93,618		1,829
Total	$	11,537	$	3,849	$	49,470	$	64,856	$	1,326,950	$	(64,020	)	$	1,327,786	$	47,603
	December 31, 2013
	Non-covered acquired loans
	Past Due (1)								Current		Discount/ Premium			Total Non-covered Acquired Loans, Net of Unearned Income		Recorded Investment > 90 days and Accruing
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total
Commercial real estate - Construction	$	388	$	—	$	2,542	$	2,930	$	19,833	$	(2,532	)	$	20,231	$	2,542
Commercial real estate - Other		1,798		1,963		27,967		31,728		345,286		(52,176	)		324,838		27,967
Commercial business		544		—		1,218		1,762		54,189		(2,914	)		53,037		1,218
Residential mortgage - Prime		—		—		226		226		18,796		(887	)		18,135		226
Consumer - Home equity		313		516		4,242		5,071		53,995		(5,623	)		53,443		4,242
Consumer - Indirect automobile		33		—		95		128		1,725		—			1,853		95
Consumer - Other		175		101		975		1,251		12,598		(1,481	)		12,368		975
Total	$	3,251	$	2,580	$	37,265	$	43,096	$	506,422	$	(65,613	)	$	483,905	$	37,265

⁽¹⁾  Past due information presents acquired loans at the gross loan balance, prior to application of discounts.

Non-accrual Loans

The following table provides the recorded investment of legacy loans on non-accrual status at December 31:

(Dollars in thousands)	2014		2013
Commercial real estate - Construction	$	69	$	1,803
Commercial real estate - Other		6,883		7,648
Commercial business		3,028		15,020
Residential mortgage - Prime		10,767		8,611
Residential mortgage - Subprime		3,595		1,626
Consumer - Home equity		7,404		6,808
Consumer - Indirect automobile		1,419		1,275
Consumer - Credit card		1,032		411
Consumer - Other		773		485
Total	$	34,970	$	43,687

The amount of interest income that would have been recorded in 2014, 2013 and 2012 if total nonaccrual loans had been current in accordance with their contractual terms was approximately $1.8 million, $2.9 million and $3.2 million respectively.

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Covered Loans

The carrying amount of the acquired covered loans at December 31, 2014 and 2013 consisted of loans determined to be impaired at the acquisition date, which are accounted for in accordance with ASC Topic 310-30, and loans that were considered to be performing at the acquisition date, accounted for by analogy to ASC Topic 310-30, as detailed in the following tables.

	December 31, 2014
(Dollars in thousands)	Acquired Impaired Loans		Acquired Performing Loans		Total Covered Loans
Commercial loans:
Real estate	$	1,253	$	187,873	$	189,126
Business		—		31,260		31,260
		1,253		219,133		220,386
Residential mortgage loans:
Residential 1-4 family		22,918		105,106		128,024
Construction / Owner Occupied		—		—		—
		22,918		105,106		128,024
Consumer and other loans:
Home equity		12,872		79,558		92,430
Indirect automobile		—		—		—
Other		489		3,215		3,704
		13,361		82,773		96,134
Total	$	37,532	$	407,012	$	444,544
	December 31, 2013
(Dollars in thousands)	Acquired Impaired Loans		Acquired Performing Loans		Total Covered Loans
Commercial loans:
Real estate	$	14,904	$	372,428	$	387,332
Business		—		37,025		37,025
		14,904		409,453		424,357
Residential mortgage loans:
Residential 1-4 family		28,223		125,802		154,025
Construction / Owner Occupied		—		—		—
		28,223		125,802		154,025
Consumer and other loans:
Home equity		21,768		115,354		137,122
Indirect automobile		—		—		—
Other		1,182		3,107		4,289
		22,950		118,461		141,411
Total	$	66,077	$	653,716	$	719,793

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Loans Acquired

As discussed in Note 4, during 2014, the Company acquired loans of $86.5 million from Trust One-Memphis, $700.5 million from Teche, and $299.3 million from First Private. Of the total $1.1 billion of loans acquired in 2014, $1.0 billion were determined to have no evidence of deteriorated credit quality and are accounted for under ASC Topics 310-10 and 310-20. The remaining $66.7 million were determined to have deteriorated credit quality under ASC Topic 310-30. The tables below show the balances acquired during 2014 for these two subsections of the portfolio as of the acquisition date.

(Dollars in thousands)
Contractually required principal and interest at acquisition	$	1,224,635
Expected losses and foregone interest		(20,790	)
Cash flows expected to be collected at acquisition		1,203,845
Fair value of acquired loans at acquisition	$	1,014,903

(Dollars in thousands)	Acquired Impaired Loans			Acquired Performing Impaired Loans			Total Acquired Loans
Contractually required principal and interest at acquisition	$	71,871		$	15,130		$	87,001
Nonaccretable difference (expected losses and foregone interest)		(6,117	)		(361	)		(6,478	)
Cash flows expected to be collected at acquisition		65,754			14,769			80,523
Accretable yield		(12,312	)		(1,536	)		(13,848	)
Basis in acquired loans at acquisition	$	53,442		$	13,233		$	66,675

The following is a summary of changes in the accretable difference for loans accounted for under ASC 310-30 of acquired impaired loans during the years ended December 31:

	2014
(Dollars in thousands)	Acquired Impaired Loans			Acquired Performing Impaired Loans			Total Acquired Loans
Balance at beginning of period	$	78,349		$	276,543		$	354,892
Acquisition		12,312			1,536			13,848
Transfers from nonaccretable difference to accretable yield		4,405			21,439			25,844
Accretion		(15,095	)		(88,138	)		(103,233	)
Changes in expected cash flows not affecting nonaccretable differences (1)		(5,722	)		2,022			(3,700	)
Balance at end of period	$	74,249		$	213,402		$	287,651
	2013
	Acquired Impaired Loans			Acquired Performing Impaired Loans			Total Acquired Loans
Balance at beginning of period	$	76,623		$	279,770		$	356,393
Transfers from nonaccretable difference to accretable yield		7,849			42,894			50,743
Accretion		(16,273	)		(163,183	)		(179,456	)
Changes in expected cash flows not affecting nonaccretable differences (1)		10,150			117,062			127,212
Balance at end of period	$	78,349		$	276,543		$	354,892
	2012
	Acquired Impaired Loans			Acquired Performing Impaired Loans			Total Acquired Loans
Balance at beginning of period	$	83,834		$	386,977		$	470,811
Acquisition		1,190			22,899			24,089
Transfers from nonaccretable difference to accretable yield		(11,816	)		(47,842	)		(59,658	)
Accretion		(30,417	)		(218,892	)		(249,309	)
Changes in expected cash flows not affecting nonaccretable differences (1)		33,832			136,628			170,460
Balance at end of period	$	76,623		$	279,770		$	356,393

⁽¹⁾ Includes changes in cash flows expected to be collected due to the impact of changes in actual or expected timing of liquidation events, modifications, changes in interest rates and changes in prepayment assumptions.

86

Troubled Debt Restructurings

Information about the Company’s TDRs at December 31, 2014 and 2013 is presented in the following tables. The Company excludes as TDRs modifications of loans that are accounted for within a pool under ASC Topic 310-30, which include the covered loans above, as well as certain acquired loans. Accordingly, such modifications do not result in the removal of those loans from the pool, even if the modification of those loans would otherwise be considered a TDR. As a result, all covered and certain acquired loans that would otherwise meet the criteria for classification as a TDR are excluded from the tables below.

	December 31, 2014								December 31, 2013
	Accruing Loans								Accruing Loans
(Dollars in thousands)	Current		Past Due > 30 days		Nonaccrual TDRs		Total TDRs		Current		Past Due > 30 days		Nonaccrual TDRs		Total TDRs
Commercial real estate - Construction	$	—	$	—	$	—	$	—	$	—		—		—		—
Commercial real estate - Other		355		—		—		355		400		—		4,452		4,852
Commercial business		1,075		—		1,971		3,046		976		—		13,791		14,767
Residential mortgage - Prime		—		—		—		—		—		—		—		—
Residential mortgage - Subprime		—		—		—		—		—		—		—		—
Consumer - Home equity		—		—		238		238		—		—		258		258
Consumer - Indirect automobile		—		—		—		—		—		—		—		—
Consumer - Credit card		—		—		—		—		—		—		—		—
Consumer - Other		—		—		—		—		—		—		—		—
Total	$	1,430	$	—	$	2,209	$	3,639	$	1,376	$	—	$	18,501	$	19,877

At December 31, 2014, there were no TDRs that occurred during the current year through modification of the original loan terms. TDRs totaling $14.6 million occurred during the year ending December 31, 2013. The following table provides information on how the TDRs were modified during years ended December 31:

(Dollars in thousands)	2014		2013
Extended maturities	$	—	$	—
Interest rate adjustment		—		—
Maturity and interest rate adjustment		—		—
Movement to or extension of interest-rate only payments		—		—
Forbearance		—		12,975
Other concession(s) (1)		—		1,587
Total	$	—	$	14,562

⁽¹⁾ Other concessions include concessions or a combination of concessions that do not consist of maturity extensions, interest rate adjustments, forbearance or covenant modifications.

The Company had no commercial real estate, residential mortgage or consumer TDRs that were added during the years ended December 31, 2014 and 2013. Information about the Company’s TDRs occurring in these periods is presented in the following table.

	December 31, 2014						December 31, 2013
(In thousands, except number of loans)	Number of Loans		Pre-modification Outstanding Recorded Investment		Post-modification Outstanding Recorded Investment (1)		Number of Loans		Pre-modification Outstanding Recorded Investment		Post-modification Outstanding Recorded Investment (1)
Commercial business		—		—		—		9		14,835		12,429
Total		—	$	—	$	—		9	$	14,835	$	12,429

⁽¹⁾ Recorded investment includes any allowance for credit losses recorded on the TDRs at the dates indicated.

Information detailing non-covered TDRs that subsequently defaulted during the previous twelve months is presented in the following table. The Company has defined a default as any loan with a loan payment that is currently past due greater than 30 days, or was past due greater than 30 days at any point during the previous twelve months, or since the date of modification, whichever is shorter.

87

	December 31, 2014				December 31, 2013
(In thousands, except number of loans)	Number of Loans		Recorded Investment		Number of Loans		Recorded Investment
Commercial real estate		30	$	—		35	$	4,452
Commercial business		9		1,600		17		12,808
Residential mortgage - Prime		—		—		—		—
Consumer - Home Equity		—		—		1		45
Consumer - Indirect automobile		—		—		—		—
Consumer - Credit card		—		—		—		—
Consumer - Other		1		—		1		—
Total		40	$	1,600		54	$	17,305

88

NOTE 7 – ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY

Allowance for Credit Losses Activity

A summary of changes in the allowance for credit losses for the covered loan and non-covered loan portfolios for the years ended December 31 is as follows:

	2014
	Non-covered loans
(Dollars in thousands)	Legacy Loans			Acquired Loans			Covered Loans			Total
Allowance for credit losses
Balance at beginning of period	$	67,342		$	4,557		$	71,175		$	143,074
(Reversal of) Provision for loan losses before benefit attributable to FDIC loss share agreements		14,274			(1,546	)		2,072			14,800
Adjustment attributable to FDIC loss share arrangements		—			—			4,260			4,260
Net (reversal of) provision for loan losses		14,274			(1,546	)		6,332			19,060
Adjustment attributable to FDIC loss share arrangements		—			—			(4,260	)		(4,260	)
Transfer of balance to OREO		—			(933	)		(6,390	)		(7,323	)
Transfer of balance to non-covered		—			8,661			(8,661	)		—
Loans charged-off		(11,312	)		(2,073	)		(13,470	)		(26,855	)
Recoveries		5,870			527			38			6,435
Balance at end of period	$	76,174		$	9,193		$	44,764		$	130,131
Reserve for unfunded lending commitments
Balance, beginning of period	$	11,147		$	—		$	—		$	11,147
Provision for unfunded lending commitments		654			—			—			654
Balance at end of period	$	11,801		$	—		$	—		$	11,801
	2013
	Non-covered loans
	Legacy Loans			Acquired Loans			Covered Loans			Total
Allowance for loan losses
Balance at beginning of period	$	74,211		$	8,816		$	168,576		$	251,603
(Reversal of) Provision for loan losses before adjustment attributable to FDIC loss share agreements		6,828			(3,158	)		(54,610	)		(50,940	)
Adjustment attributable to FDIC loss share arrangements		—			—			56,085			56,085
Net (reversal of) provision for loan losses		6,828			(3,158	)		1,475			5,145
Adjustment attributable to FDIC loss share arrangements		—			—			(56,085	)		(56,085	)
Transfer of balance to OREO		—			(1,085	)		(27,041	)		(28,126	)
Transfer of balance to the RULC		(9,828	)		—			—			(9,828	)
Loans charged-off		(10,686	)		(31	)		(15,764	)		(26,481	)
Recoveries		6,817			15			14			6,846
Balance at end of period		67,342			4,557		$	71,175		$	143,074
Reserve for unfunded lending commitments
Balance, beginning of period		—			—			—			—
Transfer of balance from the allowance for loan losses		9,828			—			—			9,828
Provision for unfunded lending commitments		1,319			—			—			1,319
Balance at end of period	$	11,147		$	—		$	—		$	11,147

89

	2012
	Non-covered loans
	Legacy Loans			Acquired Loans			Covered Loans			Total
Allowance for loan losses
Balance at beginning of period	$	74,861		$	—		$	118,900		$	193,761
Provision for loan losses before adjustment attributable to FDIC loss share agreements		3,804			9,799			91,153			104,756
Adjustment attributable to FDIC loss share arrangements		—			—			(84,085	)		(84,085	)
Net provision for loan losses		3,804			9,799			7,068			20,671
Adjustment attributable to FDIC loss share arrangements		—			—			84,085			84,085
Transfer of balance to OREO		—			(826	)		(26,343	)		(27,169	)
Loans charged-off		(9,728	)		(179	)		(15,153	)		(25,060	)
Recoveries		5,274			22			19			5,315
Balance at end of period	$	74,211		$	8,816		$	168,576		$	251,603

A summary of changes in the allowance for credit losses for non-covered loans, by loan portfolio type, for the years ended December 31 is as follows:

	2014
(Dollars in thousands)	Commercial Real Estate			Commercial Business			Residential Mortgage			Consumer			Total
Allowance for loan losses
Balance at beginning of period	$	26,590		$	28,515		$	2,546		$	14,248		$	71,899
(Reversal of) Provision for loan losses		(295	)		4,302			694			8,027			12,728
Transfer of balance to OREO		—			(868	)		—			(65	)		(933	)
Transfer of balance to non-covered		6,009			1,699			—			953			8,661
Loans charged off		(2,247	)		(1,659	)		(613	)		(8,866	)		(13,385	)
Recoveries		2,964			105			248			3,080			6,397
Balance at end of period	$	33,021		$	32,094		$	2,875		$	17,377		$	85,367
Reserve for unfunded commitments
Balance at beginning of period	$	3,089		$	4,839		$	72		$	3,147		$	11,147
(Reversal of) Provision for unfunded commitments		350			421			96			(213	)		654
Balance at end of period	$	3,439		$	5,260		$	168		$	2,934		$	11,801
Allowance on loans individually evaluated for impairment	$	20		$	407		$	—		$	3		$	430
Allowance on loans collectively evaluated for impairment		33,001			31,687			2,875			17,374			84,939
Loans, net of unearned income:
Balance at end of period	$	4,216,007		$	3,377,689		$	952,273		$	2,450,531		$	10,996,500
Balance at end of period individually evaluated for impairment		7,013			3,988			—			699			11,700
Balance at end of period collectively evaluated for impairment		4,186,968			3,369,982			936,604			2,438,569			10,932,123
Balance at end of period acquired with deteriorated credit quality		22,026			3,719			15,669			11,263			52,677

90

	2013
	Commercial			Commercial			Residential
(Dollars in thousands)	Real Estate			Business			Mortgage			Consumer			Total
Allowance for credit losses
Balance at beginning of period	$	38,264		$	28,721		$	2,125		$	13,917		$	83,027
(Reversal of) Provision for loan losses		(8,830	)		3,543			860			8,097			3,670
Transfer of balance to OREO		(319	)		(113	)		(646	)		(7	)		(1,085	)
Transfer of balance to the RULC		(2,939	)		(3,497	)		(40	)		(3,352	)		(9,828	)
Loans charged off		(2,940	)		(516	)		(518	)		(6,743	)		(10,717	)
Recoveries		3,354			377			765			2,336			6,832
Balance at end of period	$	26,590		$	28,515		$	2,546		$	14,248		$	71,899
Reserve for unfunded commitments
Balance at beginning of period	$	—		$	—		$	—		$	—		$	—
Transfer of balance from the allowance for loan losses		2,939			3,497			40			3,352			9,828
Provision for unfunded commitments		150			1,342			32			(205	)		1,319
Balance at end of period	$	3,089		$	4,839		$	72		$	3,147		$	11,147
Allowance on loans individually evaluated for impairment	$	8		$	841		$	180		$	—		$	1,029
Allowance on loans collectively evaluated for impairment		26,582			27,674			2,366			14,248			70,870
Loans, net of unearned income:
Balance at end of period	$	3,479,973		$	2,959,088		$	432,507		$	1,900,658		$	8,772,226
Balance at end of period individually evaluated for impairment		8,705			15,812			1,407			258			26,182
Balance at end of period collectively evaluated for impairment		3,459,028			2,943,246			430,974			1,899,013			8,732,261
Balance at end of period acquired with deteriorated credit quality		12,240			30			126			1,387			13,783
	2012
	Commercial			Commercial			Residential
(Dollars in thousands)	Real estate			Business			Mortgage			Consumer			Total
Allowance for credit losses
Balance at beginning of period	$	35,604		$	25,705		$	897		$	12,655		$	74,861
(Reversal of) Provision for loan losses		1,786			4,021			2,578			5,218			13,603
Transfer of balance to OREO		(292	)		—			(525	)		(9	)		(826	)
Loans charged off		(2,000	)		(1,116	)		(863	)		(5,928	)		(9,907	)
Recoveries		3,166			111			38			1,981			5,296
Balance at end of period	$	38,264		$	28,721		$	2,125		$	13,917		$	83,027
Allowance on loans individually evaluated for impairment	$	226		$	449		$	163		$	42		$	880
Allowance on loans collectively evaluated for impairment		38,038			28,272			1,962			13,875			82,147
Loans, net of unearned income:
Balance at end of period	$	2,990,700		$	2,450,667		$	290,040		$	1,674,417		$	7,405,824
Balance at end of period individually evaluated for impairment		28,052			4,401			1,703			315			34,471
Balance at end of period collectively evaluated for impairment		2,906,792			2,442,796			288,007			1,669,067			7,306,662
Balance at end of period acquired with deteriorated credit quality		55,856			3,470			330			5,035			64,691

91

A summary of changes in the allowance for credit losses for covered loans, by loan portfolio type, for the years ended December 31 is as follows:

	2014
(Dollars in thousands)	Commercial Real Estate			Commercial Business			Residential Mortgage			Consumer			Total
Allowance for loan losses
Balance at beginning of period	$	38,772		$	5,380		$	10,889		$	16,134		$	71,175
(Reversal of) Provision for loan losses		3,058			399			1,168			1,707			6,332
(Decrease) Increase in FDIC loss share receivable		227			509			(3,854	)		(1,142	)		(4,260	)
Transfer of balance to OREO		(1,897	)		(1,162	)		(1,719	)		(1,612	)		(6,390	)
Transfer of balance to non-covered		(6,009	)		(1,699	)		—			(953	)		(8,661	)
Loans charged off		(10,117	)		(2,192	)		(198	)		(963	)		(13,470	)
Recoveries		38			—			—			—			38
Balance at end of period	$	24,072		$	1,235		$	6,286		$	13,171		$	44,764
Allowance on loans individually evaluated for impairment	$	—		$	—		$	—		$	—		$	—
Allowance on loans collectively evaluated for impairment		24,072			1,235			6,286			13,171			44,764
Loans, net of unearned income:
Balance at end of period	$	189,126		$	31,260		$	128,024		$	96,134		$	444,544
Balance at end of period individually evaluated for impairment		—			—			—			—			—
Balance at end of period collectively evaluated for impairment		187,873			31,260			105,106			82,773			407,012
Balance at end of period acquired with deteriorated credit quality		1,253			—			22,918			13,361			37,532
	2013
(Dollars in thousands)	Commercial Real Estate			Commercial Business			Residential Mortgage			Consumer			Total
Allowance for credit losses
Balance at beginning of period	$	100,871		$	11,375		$	22,566		$	33,764		$	168,576
(Reversal of) Provision for loan losses		1,523			(649	)		286			315			1,475
(Decrease) Increase in FDIC loss share receivable		(28,238	)		(5,032	)		(4,896	)		(17,919	)		(56,085	)
Transfer of balance to OREO		(19,634	)		(314	)		(7,067	)		(26	)		(27,041	)
Loans charged off		(15,764	)		—			—			—			(15,764	)
Recoveries		14			—			—			—			14
Balance at end of period	$	38,772		$	5,380		$	10,889		$	16,134		$	71,175
Allowance on loans individually evaluated for impairment	$	—		$	—		$	—		$	—		$	—
Allowance on loans collectively evaluated for impairment		38,772			5,380			10,889			16,134			71,175
Loans, net of unearned income:
Balance at end of period	$	387,332		$	37,025		$	154,025		$	141,411		$	719,793
Balance at end of period individually evaluated for impairment		—			—			—			—			—
Balance at end of period collectively evaluated for impairment		372,428			37,025			125,802			118,461			653,716
Balance at end of period acquired with deteriorated credit quality		14,904			—			28,223			22,950			66,077

92

	2012
(Dollars in thousands)	Commercial Real estate			Commercial business			Residential Mortgage			Consumer			Total
Allowance for credit losses
Balance at beginning of period	$	69,175		$	9,788		$	21,184		$	18,753		$	118,900
(Reversal of) Provision for loan losses		4,970			964			323			811			7,068
(Decrease) Increase in FDIC loss share receivable		51,543			3,616			13,895			15,031			84,085
Transfer of balance to OREO		(11,202	)		(2,993	)		(11,323	)		(825	)		(26,343	)
Loans charged off		(13,631	)		—			(1,513	)		(9	)		(15,153	)
Recoveries		16			—			—			3			19
Balance at end of period	$	100,871		$	11,375		$	22,566		$	33,764		$	168,576
Allowance on loans individually evaluated for impairment	$	—		$	—		$	—		$	—		$	—
Allowance on loans collectively evaluated for impairment		100,871			11,375			22,566			33,764			168,576
Loans, net of unearned income:
Balance at end of period	$	640,843		$	87,051		$	187,164		$	177,698		$	1,092,756
Balance at end of period individually evaluated for impairment		—			—			—			—			—
Balance at end of period collectively evaluated for impairment		473,101			84,294			166,932			154,784			879,111
Balance at end of period acquired with deteriorated credit quality		167,742			2,757			20,232			22,914			213,645

Credit Quality

The Company’s investment in non-covered loans by credit quality indicator is presented in the following tables. Because of the difference in accounting for acquired loans, the tables below further segregate the Company’s non-covered loans between legacy loans and acquired loans. Loan premiums/discounts in the tables below represent the adjustment of non-covered acquired loans to fair value at the acquisition date, as adjusted for income accretion and changes in cash flow estimates in subsequent periods. Asset risk classifications for commercial loans reflect the classification as of December 31, 2014 and 2013, respectively. Credit quality information in the tables below includes loans acquired at the gross loan balance, prior to the application of premiums/discounts, at December 31, 2014 and 2013.

	Legacy loans
	December 31, 2014										December 31, 2013
(Dollars in thousands)	Pass		Special Mention		Sub- standard		Doubtful		Total		Pass		Special Mention		Sub- standard		Doubtful		Total
Commercial real estate - Construction	$	483,930	$	240	$	69	$	—	$	484,239	$	370,824	$	9,309	$	2,962	$	—	$	383,095
Commercial real estate - Other		3,161,593		49,847		22,217		162		3,233,819		2,694,161		27,227		30,308		113		2,751,809
Commercial business		3,245,912		7,330		28,965		1,933		3,284,140		2,866,794		6,164		32,167		926		2,906,051
Total	$	6,891,435	$	57,417	$	51,251	$	2,095	$	7,002,198	$	5,931,779	$	42,700	$	65,437	$	1,039	$	6,040,955

	Legacy loans
	December 31, 2014						December 31, 2013
(Dollars in thousands)	Current		30+ Days Past Due		Total		Current		30+ Days Past Due		Total
Residential mortgage - Prime	$	392,900	$	15,310	$	408,210	$	286,167	$	11,640	$	297,807
Residential mortgage - Subprime		115,889		3,595		119,484		114,939		1,626		116,565
Consumer - Home equity		1,278,865		12,111		1,290,976		1,091,894		9,333		1,101,227
Consumer - Indirect automobile		392,504		4,262		396,766		370,388		2,995		373,383
Consumer - Credit card		71,297		1,448		72,745		62,873		769		63,642
Consumer - Other		375,853		2,482		378,335		293,693		1,049		294,742
Total	$	2,627,308	$	39,208	$	2,666,516	$	2,219,954	$	27,412	$	2,247,366

93

	Non-covered acquired loans
	December 31, 2014													December 31, 2013
(Dollars in thousands)	Pass		Special Mention		Substandard		Doubtful		Discount			Total		Pass		Special Mention		Substandard		Doubtful		Discount			Total
Commercial real estate - Construction	$	24,118	$	2,006	$	4,624	$	—	$	(1,170	)	$	29,578	$	21,244	$	—	$	1,519	$	—	$	(2,532	)	$	20,231
Commercial real estate - Other		445,557		12,794		49,139		—		(39,119	)		468,371		350,412		5,096		21,413		93		(52,176	)		324,838
Commercial business		91,837		1,861		4,818		257		(5,224	)		93,549		53,533		517		1,901		—		(2,914	)		53,037
Total	$	561,512	$	16,661	$	58,581	$	257	$	(45,513	)	$	591,498	$	425,189	$	5,613	$	24,833	$	93	$	(57,622	)	$	398,106

	Non-covered acquired loans
	December 31, 2014									December 31, 2013
(Dollars in thousands)	Current		30+ Days Past Due		Premium (discount)			Total		Current		30+ Days Past Due		Premium (discount)			Total
Residential mortgage - Prime	$	418,552	$	11,858	$	(5,831	)	$	424,579	$	18,796	$	226	$	(887	)	$	18,135
Consumer - Home equity		216,310		9,808		(8,419	)		217,699		53,995		5,071		(5,623	)		53,443
Consumer - Indirect automobile		393		39		(40	)		392		1,725		128		—			1,853
Consumer - Other		94,315		3,520		(4,217	)		93,618		12,598		1,251		(1,481	)		12,368
Total	$	729,570	$	25,225	$	(18,507	)	$	736,288	$	87,114	$	6,676	$	(7,991	)	$	85,799

The Company’s investment in covered loans by credit quality indicator is presented in the following table. Loan premiums/discounts in the tables below represent the adjustment of covered loans to net book value before allowance at the reporting date.

	Covered loans
	December 31, 2014											December 31, 2013
(Dollars in thousands)	Pass		Special Mention		Substandard		Doubtful		Total			Pass		Special Mention		Substandard		Doubtful		Total
Commercial real estate - Construction	$	34,731	$	1,928	$	8,008	$	—	$	44,667		$	42,886	$	7,401	$	23,891	$	497	$	74,675
Commercial real estate - Other		87,509		20,422		51,252		—		159,183			148,579		49,699		144,680		3,267		346,225
Commercial business		23,380		395		9,275		—		33,050			30,710		780		14,556		984		47,030
	$	145,620	$	22,745	$	68,535	$	—	$	236,900		$	222,175	$	57,880	$	183,127	$	4,748	$	467,930
Discount										(16,514	)										(43,573	)
Total									$	220,386										$	424,357

	Covered loans
	December 31, 2014									December 31, 2013
(Dollars in thousands)	Current		30+ Days Past Due		Premium (discount)			Total		Current		30+ Days Past Due		Premium (discount)			Total
Residential prime	$	140,628	$	22,058	$	(34,662	)	$	128,024	$	158,710	$	30,814	$	(35,499	)	$	154,025
Consumer - Home equity		99,478		16,542		(23,590	)		92,430		143,236		35,811		(41,925	)		137,122
Consumer - Credit card		614		34		—			648		648		31		—			679
Consumer - Other		337		18		2,701			3,056		591		144		2,875			3,610
Total	$	241,057	$	38,652	$	(55,551	)	$	224,158	$	303,185	$	66,800	$	(74,549	)	$	295,436

94

Legacy Impaired Loans

Information on the Company’s investment in legacy impaired loans is presented in the following tables as of and for the periods indicated.

	December 31, 2014
(Dollars in thousands)	Recorded Investment		Unpaid Principal Balance		Related Allowance			Average Recorded Investment		Interest Income Recognized
With no related allowance recorded:
Commercial real estate	$	6,680	$	6,680	$	—		$	6,703	$	132
Commercial business		2,483		2,483		—			2,873		57
Consumer - Home equity		682		682		—			696		19
With an allowance recorded:
Commercial real estate		1,068		1,093		(25	)		1,158		39
Commercial business		1,212		1,620		(408	)		2,117		23
Residential mortgage - Prime		10,532		10,768		(236	)		10,577		11
Residential mortgage - Subprime		3,579		3,595		(16	)		3,686		99
Consumer - Home equity		7,121		7,165		(44	)		7,544		43
Consumer - Indirect automobile		1,410		1,419		(9	)		2,016		51
Consumer - Credit card		1,012		1,032		(20	)		797		—
Consumer - Other		781		790		(9	)		1,009		39
Total	$	36,560	$	37,327	$	(767	)	$	39,176	$	513
Total commercial loans	$	11,443	$	11,876	$	(433	)	$	12,851	$	251
Total mortgage loans		14,111		14,363		(252	)		14,263		110
Total consumer loans		11,006		11,088		(82	)		12,062		152

	December 31, 2013
(Dollars in thousands)	Recorded Investment		Unpaid Principal Balance		Related Allowance			Average Recorded Investment		Interest Income Recognized
With no related allowance recorded:
Commercial real estate	$	8,567	$	8,567	$	—		$	10,443	$	43
Commercial business		13,256		13,256		—			11,074		170
Consumer - Home equity		258		258		—			281		1
With an allowance recorded:
Commercial real estate		1,268		1,284		(16	)		4,414		8
Commercial business		1,927		2,770		(843	)		2,892		100
Residential mortgage - Prime		9,791		10,019		(228	)		8,096		98
Residential mortgage - Subprime		1,617		1,626		(9	)		1,579		—
Consumer - Home equity		6,506		6,550		(44	)		7,593		93
Consumer - Indirect automobile		1,267		1,275		(8	)		2,090		55
Consumer - Credit card		404		411		(7	)		418		—
Consumer - Other		481		485		(4	)		765		19
Total	$	45,342	$	46,501	$	(1,159	)	$	49,645	$	587
Total commercial loans	$	25,018	$	25,877	$	(859	)	$	28,823	$	321
Total mortgage loans		11,408		11,645		(237	)		9,675		98
Total consumer loans		8,916		8,979		(63	)		11,147		168

As of December 31, 2014 and 2013, the Company was not committed to lend additional funds to any customer whose loan was classified as impaired or as a troubled debt restructuring.

95

NOTE 8 – LOSS SHARING AGREEMENTS AND FDIC LOSS SHARE RECEIVABLE

Loss Sharing Agreements

In 2009, the Company acquired substantially all of the assets and liabilities of CSB, and certain assets and assumed certain deposits and other liabilities of Orion and Century. In 2010, the Company acquired certain assets, deposits, and other liabilities of Sterling. Excluding consumer loans acquired from Sterling, the loans and foreclosed real estate that were acquired in these transactions are covered by loss share agreements between the FDIC and IBERIABANK, which afford IBERIABANK loss protection.

During the reimbursable loss periods, the FDIC will cover 80% of covered loan and foreclosed real estate losses up to certain thresholds for all four acquisitions, and 95% of losses that exceed contractual thresholds for CSB, Orion, and Century. The CSB reimbursable loss period ended as of October 1, 2014 for all covered assets excluding single family residential assets. The CSB reimbursable loss period for single family residential assets will end during the third quarter of 2019. The Century and Orion reimbursable loss periods ended as of January 1, 2015 for all covered assets excluding single family residential assets and will end during the fourth quarter of 2019 for single family residential assets. The Sterling reimbursable loss period ends during the third quarter of 2015 for all covered assets excluding single family residential assets and will end during the third quarter of 2020 for single family residential assets. To the extent that loss share coverage ends prior to triggering events on covered assets that would enable the Company to collect these amounts from the FDIC, future impairments may be required.

In addition, all covered assets, excluding single family residential assets, have a three year recovery period, which begins upon expiration of the reimbursable loss period. During the recovery periods, the Company must reimburse the FDIC for its share of any recovered losses, net of certain expenses, consistent with the covered loss reimbursement rates in effect during the recovery periods.

The Orion, Century, and Sterling loss share agreements include “clawback” provisions. The clawback provisions require the Company to make payments to the FDIC to the extent that specified cumulative loss floors are not met. For each of the three loss share agreements that contain clawback provisions, cumulative losses have exceeded the cumulative loss floors that would trigger a clawback payment. Previously, the sum of the historical and remaining projected losses and recoveries under one agreement was less than the clawback threshold stated in that agreement. The Company had $0.8 million recorded at December 31, 2013, to reserve for the amount of clawback consideration due to the FDIC based on projected net losses. As of December 31, 2014, projected net losses indicate that a clawback payment is no longer probable. Accordingly, the reserve balance was reversed in 2014 through a reduction of expense in the Company’s consolidated statement of comprehensive income for the year ended December 31, 2014. Improvement in the performance of covered assets in excess of current expectations, particularly in regard to improvements in recoveries and/or reduced losses, through expiration of the recovery periods could result in reduced levels of cumulative losses that trigger the clawback provisions within any or all of the applicable loss share agreements.

FDIC loss share receivables

The Company recorded indemnification assets in the form of FDIC loss share receivables as of the acquisition date of each of the four banks covered by loss share agreements. At acquisition, the indemnification assets represented the fair value of the expected cash flows to be received from the FDIC under the loss share agreements. Subsequent to acquisition, the FDIC loss share receivables are updated to reflect changes in actual and expected amounts collectible adjusted for amortization.

The following is a summary of FDIC loss share receivables year-to-date activity:

	December 31
(Dollars in thousands)	2014			2013
Balance at beginning of period	$	162,312		$	423,069
Change due to (reversal of) loan loss provision recorded on FDIC covered loans		(4,260	)		(56,085	)
Amortization		(74,617	)		(97,849	)
Recoveries payable (submission of reimbursable losses) to the FDIC		3,282			(52,586	)
Impairment		(5,121	)		(31,813	)
Changes due to a change in cash flow assumptions on OREO and other changes		(11,969	)		(22,424	)
Balance at end of period	$	69,627		$	162,312

Impairment of FDIC loss share receivables

Based on improving economic trends, their impact on the amount and timing of expected future cash flows, and delays in the foreclosure process, during the loss share receivable collectibility assessment completed for the year ended December 31, 2014, the Company concluded that certain expected losses were probable of not being collected from either the FDIC or the customer because such projected losses were no longer expected to occur or were expected to occur beyond the reimbursable loss periods specified within the loss share agreements. Management deemed an impairment charge necessary for the year ended December 31, 2014 for $5.1 million attributable to losses on OREO transactions that moved beyond the loss share term.

On April 10, 2013, management concluded that an impairment charge of $31.8 million was required and was recognized in the Company’s consolidated financial statements during the three-month period ended March 31, 2013.

FDIC loss share receivables collectability assessment

The Company assesses the FDIC loss share receivables for collectibility on a quarterly basis. Based on the collectability analysis completed for the year ended December 31, 2014, the Company concluded that the $69.6 million FDIC loss share receivable is fully collectible as of December 31, 2014.

96

NOTE 9 –TRANSFERS AND SERVICING OF FINANCIAL ASSETS (INCLUDING MORTGAGE BANKING ACTIVITY)

Commercial Banking Activity

The unpaid principal balances of loans serviced for others were $533.8 million and $345.0 million at December 31, 2014 and 2013, respectively. Custodial escrow balances maintained in connection with the foregoing portfolio of loans serviced for others, and included in demand deposits, were immaterial at December 31, 2014 and 2013.

Mortgage Banking Activity

IBERIABANK through its subsidiary, IMC, originates mortgage loans for sale into the secondary market. The loans originated primarily consist of residential first mortgages that conform to standards established by the GSEs, but can also consist of junior lien loans secured by residential property. These sales are primarily to private companies that are unaffiliated with the GSEs on a servicing released basis. Changes to the carrying amount of mortgage loans held for sale at December 31 are presented in the following table.

(Dollars in thousands)	2014			2013			2012
Balance at beginning of period	$	128,442		$	267,475		$	153,013
Originations and Purchases		1,675,538			2,116,460			2,432,367
Sales, net of gains		(1,657,409	)		(2,255,493	)		(2,317,905	)
Other		(6,499	)		—			—
Balance at end of period	$	140,072		$	128,442		$	267,475

The following table details the components of mortgage income for the years ended December 31:

(Dollars in thousands)	2014			2013			2012
Fair value changes of derivatives and mortgage loans held for sale:
Mortgage loans held for sale and derivatives	$	631		$	(4,822	)	$	6,772
Derivative settlements		(8,743	)		3,100			—
Gains on sales		59,156			65,393			70,811
Servicing and other income, net		753			526			470
	$	51,797		$	64,197		$	78,053

Mortgage Servicing Rights

Mortgage servicing rights are recorded at the lower of cost or market in “Other assets” on the consolidated balance sheets and are amortized over the remaining servicing life of the loans, with consideration given to prepayment assumptions. Mortgage servicing rights had the following carrying values as of December 31:

	2014							2013
	Gross		Accumulated			Net		Gross		Accumulated			Net
(Dollars in thousands)	Carrying Amount		Amortization			Carrying Amount		Carrying Amount		Amortization			Carrying Amount
Mortgage servicing rights	$	4,751	$	(1,253	)	$	3,498	$	2,146	$	(638	)	$	1,508

97

The related amortization expense of mortgage servicing rights is as follows:

(Dollars in thousands)	Amount
Aggregate amortization expense for the years ended December 31:
2012	$	225
2013		480
2014		759
Estimated amortization expense for the years ended December 31:
2015	$	1,550
2016		697
2017		531
2018		371
2019		230
2020 and thereafter		119

NOTE 10 – PREMISES AND EQUIPMENT

Premises and equipment consisted of the following at December 31:

(Dollars in thousands)	2014			2013
Land	$	75,916		$	77,113
Buildings		232,727			217,469
Furniture, fixtures and equipment		128,388			110,663
Total premises and equipment		437,031			405,245
Accumulated depreciation		(129,872	)		(117,735	)
Total premises and equipment, net	$	307,159		$	287,510

Depreciation expense was $19.4 million, $19.6 million, and $18.3 million, for the years ended December 31, 2014, 2013, and 2012, respectively.

The Company actively engages in leasing office space available in buildings it owns. Leases have different terms ranging from monthly rental to five-year leases. For the year ended December 31, 2014, income from these leases averaged $0.1 million per month. Total lease income for the years ended December 31, 2014, 2013, and 2012 was $1.6 million, $1.5 million, and $1.6 million, respectively. Income from leases is reported as a reduction in occupancy and equipment expense. The total allocated cost of the portion of the buildings held for lease at December 31, 2014 and 2013 was $7.6 million and $9.5 million, respectively, with related accumulated depreciation of $2.4 million and $3.0 million, respectively.

The Company leases certain branch and corporate offices, land and ATM facilities through non-cancelable operating leases with terms that range from one to 50 years, with renewal options thereafter. Certain of the leases have escalation clauses and renewal options ranging from monthly renewal to 50 years. Rent expense for the years ended December 31, 2014, 2013, and 2012 totaled $10.7 million, $11.4 million, and $10.6 million, respectively.

98

Minimum future annual rent commitments under lease agreements for the periods indicated are as follows:

(Dollars in thousands)
2015	$	11,541
2016		9,878
2017		8,153
2018		7,333
2019		6,214
2020 and thereafter		31,860
	$	74,979

NOTE 11 – GOODWILL AND OTHER ACQUIRED INTANGIBLE ASSETS

Goodwill

Changes to the carrying amount of goodwill by reporting unit for the years ended December 31, 2014 and 2013 are provided in the following table.

(Dollars in thousands)	IBERIABANK		IMC		LTC		Total
Balance, December 31, 2012	$	373,905	$	23,178	$	4,789	$	401,872
Goodwill acquired during the year		—		—		—		—
Balance, December 31, 2013		373,905	$	23,178	$	4,789		401,872
Goodwill acquired during the year		115,278		—		376		115,654
Balance, December 31, 2014	$	489,183	$	23,178	$	5,165	$	517,526

The goodwill acquired in 2014 was a result of the Trust One-Memphis, Teche, First Private, The Title Company, LLC and Louisiana Abstract and Title, LLC acquisitions. See Note 4 for further information.

The Company performed the required annual goodwill impairment test as of October 1, 2014. The Company’s annual impairment test did not indicate impairment in any of the Company’s reporting units as of the testing date. Subsequent to the testing date, management has evaluated the events and changes that could indicate that goodwill might be impaired and concluded that a subsequent test is not required.

Prior to 2012, the Company recognized goodwill impairment of $9.7 million at the Company’s LTC reporting unit based on a decrease in operating revenue and income, which resulted in the conclusion that the fair value of LTC may have been reduced below its carrying amount.

Title Plant

The Company held title plant assets recorded in “Other assets” on the consolidated balance sheets totaling $6.7 million at both December 31, 2014 and 2013, respectively. No events or changes in circumstances occurred during 2014 or 2013 to suggest the carrying value of the title plant was not recoverable.

Intangible assets subject to amortization

Definite-lived intangible assets had the following carrying values included in “Other assets” on the Company’s consolidated balance sheets as of December 31:

	2014							2013
(Dollars in thousands)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Core deposit intangibles	$	55,949	$	(36,354	)	$	19,595	$	45,406	$	(30,784	)	$	14,622
Customer relationship intangible asset		1,348		(822	)		526		1,348		(631	)		717
Non-compete agreement		163		(82	)		81		—		—			—
Other intangible assets		205		(46	)		159		—		—			—
Total	$	57,665	$	(37,304	)	$	20,361	$	46,754	$	(31,415	)	$	15,339

99

The related amortization expense of intangible assets is as follows:

(Dollars in thousands)	Amount
Aggregate amortization expense for the years ended December 31:
2012	$	5,150
2013		4,720
2014		5,807
Estimated amortization expense for the years ended December 31:
2015	$	5,646
2016		5,187
2017		3,586
2018		2,597
2019		1,877
2020 and thereafter		1,468

NOTE 12 – OTHER REAL ESTATE OWNED

Other real estate owned is included in Other assets on the Company’s consolidated balance sheets. Other real estate owned, segregated into non-covered and covered properties, consists of the following at December 31 for the periods indicated. For further discussion of loss share coverage periods applicable to the covered foreclosed assets, see Note 8 to these consolidated financial statements.

	2014						2013
(Dollars in thousands)	Non-covered		Covered (1)		Total		Non-covered		Covered		Total
Real estate owned acquired by foreclosure	$	18,614	$	22,872	$	41,486	$	28,072	$	60,474	$	88,546
Real estate acquired for development or resale		11,556		—		11,556		9,206		—		9,206
Other foreclosed property		81		824		905		93		1,328		1,421
Total	$	30,251	$	23,696	$	53,947	$	37,371	$	61,802	$	99,173

⁽¹⁾ Included in covered OREO at December 31, 2014 is $9.6 million of assets whose reimbursable loss periods ended as of January 1, 2015.

During the second quarter of 2013, the Company announced plans to close ten branches as part of its business strategy. In addition, during the second quarter of 2014, the Company closed nine branches as part of its acquisition of Teche. The Company notified customers of these branch closings and received the required regulatory approvals to proceed with closure. The Company reviewed the carrying amount of the owned properties and concluded carrying amounts exceeded the fair value of certain branches at that date. Fair value of the branches was based on a third-party broker opinion of value using both a comparable sales and cash flow approach. The Company did not modify the third-party pricing information for unobservable inputs. As a result, the Company recorded impairment losses in other non-interest expense in its consolidated statements of comprehensive income for the years ended December 31, 2014 and 2013. After the impairment losses, the carrying value of the branches was $3.0 million and $5.1 million at December 31, 2014 and 2013, respectively, and is included in OREO (as real estate acquired for development or resale) on the Company’s consolidated balance sheets.

100

NOTE 13 –DERIVATIVE INSTRUMENTS AND OTHER HEDGING ACTIVITIES

Information pertaining to outstanding derivative instruments is as follows:

	Balance Sheet	Asset Derivatives Fair Value				Balance Sheet	Liability Derivatives Fair Value
(Dollars in thousands)	Location	December 31, 2014		December 31, 2013		Location	December 31, 2014		December 31, 2013
Derivatives not designated as hedging instruments under ASC Topic 815:
Interest rate contracts	Other assets	$	15,434	$	10,621	Other liabilities	$	15,434	$	10,620
Forward sales contracts	Other assets		25		1,468	Other liabilities		2,556		287
Written and purchased options	Other assets		17,444		17,987	Other liabilities		13,364		15,828
Total		$	32,903	$	30,076		$	31,354	$	26,735
		Asset Derivatives Notional Amount					Liability Derivatives Notional Amount
(Dollars in thousands)		December 31, 2014		December 31, 2013			December 31, 2014		December 31, 2013
Derivatives not designated as hedging instruments under ASC Topic 815:
Interest rate contracts		$	444,703	$	380,303		$	444,703	$	380,303
Forward sales contracts			15,897		192,876			391,992		45,091
Written and purchased options			362,580		295,425			225,741		199,061
Total		$	823,180	$	868,604		$	1,062,436	$	624,455

The Company is party to collateral agreements with certain derivative counterparties. Such agreements require that the Company maintain collateral based on the fair values of individual derivative transactions. In the event of default by the Company, the counterparty would be entitled to the collateral.

101

At December 31, 2014 and 2013, the Company was required to post $11.5 million and $5.0 million, respectively, in cash as collateral for its derivative transactions, which are included in interest-bearing deposits in banks on the Company’s consolidated balance sheets. The Company does not anticipate additional assets will be required to be posted as collateral, nor does it believe additional assets would be required to settle its derivative instruments immediately if contingent features were triggered at December 31, 2014. The Company’s master netting agreements represent written, legally enforceable bilateral agreements that (1) create a single legal obligation for all individual transactions covered by the master agreement and (2) in the event of default, provide the non-defaulting counterparty the right to accelerate, terminate, and close-out on a net basis all transactions under the agreement and to promptly liquidate or set-off collateral posted by the defaulting counterparty. As permitted by U.S. GAAP, the Company does not offset fair value amounts recognized for the right to reclaim cash collateral or the obligation to return cash collateral against recognized fair value amounts of derivatives executed with the same counterparty under a master netting agreement. The following table reconciles the gross amounts presented in the consolidated balance sheets to the net amounts that would result in the event of offset.

	December 31, 2014
(Dollars in thousands) Derivatives subject to master netting arrangements	Gross Amounts		Gross Amounts Not Offset
	Presented in the		in the Balance Sheet
	Balance Sheet		Derivatives		Collateral (1)			Net
Derivative assets
Interest rate contracts designated as hedging instruments	$	—	$	—	$	—		$	—
Interest rate contracts not designated as hedging instruments		15,411		—		—			15,411
Written and purchased options		13,387		—		—			13,387
Total derivative assets subject to master netting arrangements	$	28,798	$	—	$	—		$	28,798
Derivative liabilities
Interest rate contracts designated as hedging instruments	$	—	$	—	$	—		$	—
Interest rate contracts not designated as hedging instruments		15,411		—		(3,735	)		11,676
Total derivative liabilities subject to master netting arrangements	$	15,411	$	—	$	(3,735	)	$	11,676

⁽¹⁾  Consists of cash collateral recorded at cost, which approximates fair value, and investment securities.

	December 31, 2013
(Dollars in thousands) Derivatives subject to master netting arrangements	Gross Amounts		Gross Amounts Not Offset
	Presented in the		in the Balance Sheet
	Balance Sheet		Derivatives		Collateral (1)			Net
Derivative assets
Interest rate contracts designated as hedging instruments	$	—	$	—	$	—		$	—
Interest rate contracts not designated as hedging instruments		10,621		—		—			10,621
Written and purchased options		15,801		—		—			15,801
Total derivative assets subject to master netting arrangements	$	26,422	$	—	$	—		$	26,422
Derivative liabilities
Interest rate contracts designated as hedging instruments	$	—	$	—	$	—		$	—
Interest rate contracts not designated as hedging instruments		10,620		—		(5,419	)		5,201
Total derivative liabilities subject to master netting arrangements	$	10,620	$	—	$	(5,419	)	$	5,201

⁽¹⁾  Consists of cash collateral recorded at cost, which approximates fair value, and investment securities.

During the years ended December 31, 2014 and 2013, the Company has not reclassified into earnings any gain or loss as a result of the discontinuance of cash flow hedges because it was probable the original forecasted transaction would not occur by the end of the originally specified term.

At December 31, 2014, the fair value of derivatives that will mature within the next twelve months is $0.4 million. The Company does not expect to reclassify any amount from accumulated other comprehensive income into interest income over the next twelve months for derivatives that will be settled.

102

At December 31, 2014 and 2013, and for years then ended, information pertaining to the effect of the hedging instruments on the consolidated financial statements is as follows:

(Dollars in thousands)	Amount of Gain (Loss) Recognized in OCI net of taxes (Effective Portion)				Location of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective  Portion)					Location of Gain (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing	Amount of Gain (Loss) Recognized in Income on Derivative (Ineffective Portion  and Amount Excluded from Effectiveness Testing)
	As of December 31					For the Years Ended December 31
	2014		2013			2014		2013				2014			2013
Derivatives in ASC Topic 815 Cash Flow Hedging Relationships
Interest rate contracts	$	—	$	—	Other income (expense)	$	—	$	(392	)	Other income (expense)	$	(1	)	$	1
Total	$	—	$	—		$	—	$	(392	)		$	(1	)	$	1

(Dollars in thousands)
	Location of Gain (Loss) Recognized in Income on Derivatives	Amount of Gain (Loss) Recognized in Income on Derivatives
		2014			2013
Derivatives Not Designated as Hedging Instruments under ASC Topic 815
Interest rate contracts	Other income (expense)	$	2,513		$	2,991
Forward sales contracts	Mortgage Income		(3,225	)		(1,716	)
Written and purchased options	Mortgage Income		(5,739	)		(3,032	)
Total		$	(6,451	)	$	(1,757	)

At December 31, additional information pertaining to outstanding interest rate swap agreements not designated as hedging instruments is as follows:

(Dollars in thousands)	2014			2013
Weighted average pay rate		2.9	%		3.0	%
Weighted average receive rate		0.4	%		0.2	%
Weighted average maturity in years		7.7	yrs		7.6	yrs
Unrealized gain (loss) relating to interest rate swaps	$	—		$	—

NOTE 14 – DEPOSITS

Deposits at December 31 are summarized as follows:

(Dollars in thousands)	2014		2013
Non-interest-bearing deposits	$	3,195,430	$	2,575,939
Negotiable order of withdrawal (NOW)		2,462,841		2,283,491
Money market deposits accounts (MMDA)		4,168,504		3,779,581
Savings deposits		577,513		387,397
Certificates of deposit and other time deposits		2,116,237		1,710,592
	$	12,520,525	$	10,737,000

Total time deposits summarized by denomination at December 31 are as follows:

(Dollars in thousands)	2014		2013
Time deposits less than $100,000	$	1,035,438	$	804,250
Time deposits greater than $100,000		1,080,799		906,342
	$	2,116,237	$	1,710,592

103

A schedule of maturities of all certificates of deposit as of December 31, 2014 is as follows:

(Dollars in thousands)
Years ending December 31
2015	$	1,297,125
2016		493,944
2017		171,884
2018		57,580
2019		49,967
2020 and thereafter		45,737
	$	2,116,237

NOTE 15 – SHORT-TERM BORROWINGS

Short-term borrowings at December 31 are summarized as follows:

(Dollars in thousands)	2014		2013
Federal Home Loan Bank advances	$	603,000	$	375,000
Securities sold under agreements to repurchase		242,742		305,344
	$	845,742	$	680,344

Securities sold under agreements to repurchase, which are classified as secured borrowings, generally mature daily and are reflected at the amount of cash received in connection with the transaction. The Company may be required to provide additional collateral based on the fair value of the underlying securities.

Additional information on the Company’s short-term borrowings for the years indicated is as follows:

(Dollars in thousands)	2014			2013			2012
Outstanding at December 31	$	845,742		$	680,344		$	303,045
Maximum month-end outstanding balance		1,034,741			680,344			640,768
Average daily outstanding balance		782,033			303,352			284,201
Average rate during the year		0.17	%		0.16	%		0.22	%
Average rate at year end		0.18	%		0.15	%		0.22	%

104

NOTE 16 – LONG-TERM DEBT

Long-term debt at December 31 is summarized as follows:

(Dollars in thousands)
	2014		2013
IBERIABANK:
Federal Home Loan Bank notes, 0.724% to 7.040%	$	210,549	$	92,267
Notes payable - Investment fund contribution, 7 to 40 year term, 0.50% to 5.00% fixed		80,843		76,570
		291,392		168,837
IBERIABANK Corporation (junior subordinated debt):
Statutory Trust I, 3 month LIBOR (1), plus 3.25%		10,310		10,310
Statutory Trust II, 3 month LIBOR (1), plus 3.15%		10,310		10,310
Statutory Trust III, 3 month LIBOR (1), plus 2.00%		10,310		10,310
Statutory Trust IV, 3 month LIBOR (1), plus 1.60%		15,464		15,464
American Horizons Statutory Trust I, 3 month LIBOR (1), plus 3.15%		6,186		6,186
Statutory Trust V, 3 month LIBOR (1), plus 1.435%		10,310		10,310
Statutory Trust VI, 3 month LIBOR (1), plus 2.75%		12,372		12,372
Statutory Trust VII, 3 month LIBOR (1), plus 2.54%		13,403		13,403
Statutory Trust VIII, 3 month LIBOR (1), plus 3.50%		7,217		7,217
OMNI Trust I, 3 month LIBOR (1), plus 3.30%		8,248		8,248
OMNI Trust II, 3 month LIBOR (1), plus 2.79%		7,732		7,732
		111,862		111,862
	$	403,254	$	280,699

⁽¹⁾ The interest rate on the Company’s long-term debt indexed to LIBOR is based on the 3-month LIBOR rate. The 3-month LIBOR rate was 0.26% and 0.25% at December 31, 2014 and 2013, respectively.

Outstanding FHLB advances are amortized over periods ranging from 2 to 20 years, and have a balloon feature at maturity. Advances are collateralized by a blanket pledge of eligible loans, subject to contractual adjustments which reduce the borrowing base, as well as a secondary pledge of FHLB stock and FHLB demand deposits, the amount of which can exceed the amounts borrowed based on contractually required adjustments. Total additional advances available from the FHLB at December 31, 2014 were $2.8 billion under the blanket floating lien and an additional $736.3 million with a pledge of investment securities. The weighted average advance rate was 3.24% and 3.95% at December 31, 2014 and 2013, respectively.

The Company has various funding arrangements with commercial banks providing up to $155.0 million in the form of federal funds and other lines of credit. At December 31, 2014, there were no balances outstanding on these lines and all of the funding was available to the Company.

Junior subordinated debt consists of a total of $111.9 million in Junior Subordinated Deferrable Interest Debentures of the Company issued to statutory trusts that were funded by the issuance of floating rate capital securities of the trusts. Issuances of $10.3 million each were completed in November 2002, June 2003, September 2004, and June 2007 and an issuance of $15.5 million was completed in October 2006. The issue of $6.2 million completed in March 2003 was assumed in the American Horizons acquisition. The Company issued $25.8 million in November 2007 and $7.2 million in March 2008 to provide funding for various business activities, primarily loan growth. Issuances of $8.2 million and $7.7 million were assumed in the OMNI acquisition during 2011.

The terms of the junior subordinated debt are 30 years, and they are callable at par by the Company any time after 5 years. Interest is payable quarterly and may be deferred at any time at the election of the Company for up to 20 consecutive quarterly periods. During a deferral period, the Company is subject to certain restrictions, including being prohibited from declaring and paying dividends to its common shareholders.

As of December 31, 2014, the junior subordinated debt qualifies as Tier 1 capital for regulatory purposes.

105

Advances and long-term debt at December 31, 2014 have maturities or call dates in future years as follows:

(Dollars in thousands)
2015	$	6,941
2016		41,916
2017		101,321
2018		20,741
2019		8,696
2020 and thereafter		223,639
	$	403,254

NOTE 17 – INCOME TAXES

The provision for income tax expense consists of the following for the years ended December 31:

(Dollars in thousands)	2014			2013			2012
Current expense	$	69,612		$	62,468		$	44,125
Deferred benefit		(24,955	)		(35,943	)		(7,527	)
Tax credits		(12,012	)		(11,690	)		(8,756	)
Tax benefits attributable to items charged to equity and goodwill		2,105			1,034			654
	$	34,750		$	15,869		$	28,496

There was a balance receivable of $2 million and a balance payable of $8 million for federal and state income taxes at December 31, 2014 and 2013, respectively. The provision for federal income taxes differs from the amount computed by applying the federal income tax statutory rate of 35 percent on income before income tax expense as indicated in the following analysis for the years ended December 31:

(Dollars in thousands)	2014			2013			2012
Federal tax based on statutory rate	$	49,070		$	28,340		$	36,712
Increase (decrease) resulting from:
Effect of tax-exempt income		(7,064	)		(7,282	)		(7,558	)
Interest and other nondeductible expenses		2,642			2,007			1,847
State taxes, net of federal Benefit		2,531			3,237			4,938
Tax credits		(12,012	)		(11,690	)		(8,756	)
Other		(417	)		1,257			1,313
	$	34,750		$	15,869		$	28,496
Effective tax rate		24.8	%		19.6	%		27.2	%

The composition of other items resulting in a net tax benefit of $0.4 million for the year ending December 31, 2014 arose principally from an increase of $3.2 million for basis reductions associated with federal tax credits, offset by $3.6 million of other discrete items, including BOLI death benefits and prior year provision-to-return adjustments.

106

The net deferred tax asset at December 31 is as follows:

(Dollars in thousands)
	2014			2013
Deferred tax asset:
NOL carryforward	$	978		$	1,001
Allowance for credit losses		59,267			85,101
Deferred compensation		6,631			6,315
Basis difference in acquired assets		53,202			70,136
Unrealized loss on available for sale investments		—			8,880
OREO		9,845			31,943
Other		13,530			19,509
		143,453			222,885
Deferred tax liability:
Basis difference in acquired assets		(53,940	)		(130,426	)
Gain on acquisition		(2,426	)		(17,693	)
FHLB stock		(85	)		(36	)
Premises and equipment		(9,652	)		(10,209	)
Acquisition intangibles		(12,151	)		(12,113	)
Deferred loan costs		(3,771	)		(2,915	)
Unrealized gain on available for sale investments		(4,052	)		—
Investments acquired		(570	)		(235	)
Swap gain		(75	)		(75	)
Other		(12,908	)		(11,089	)
		(99,630	)		(184,791	)
Net deferred tax asset	$	43,823		$	38,094

The Company determined that the net deferred tax asset is more likely than not to be realized based on an assessment of all available positive and negative evidence and therefore no valuation allowance has been recorded as of December 31, 2014 or 2013.

Retained earnings at December 31, 2014 and 2013 included approximately $21.9 million accumulated prior to January 1, 1987 for which no provision for federal income taxes has been made. If this portion of retained earnings is used in the future for any purpose other than to absorb bad debts, it will be added to future taxable income.

The Company does not believe it has any unrecognized tax benefits included in its consolidated financial statements. The Company has not had any settlements in the current period with taxing authorities, nor has it recognized tax benefits as a result of a lapse of the applicable statute of limitations.

During the years ended December 31, 2014, 2013, and 2012, the Company did not recognize any interest or penalties in its consolidated financial statements, nor has it recorded a liability for interest or penalty payments.

107

NOTE 18 – SHAREHOLDERS’ EQUITY AND OTHER COMPREHENSIVE INCOME (LOSS)

Other Comprehensive Income

The following is a summary of the tax effects of each component of other comprehensive income for the years ended December 31:

	2014
(Dollars in thousands)	Before Tax			Tax Expense			Net-of-Tax Amount
Unrealized gain on securities:
Unrealized holding gains arising during the period	$	37,719		$	(13,202	)	$	24,517
Reclassification adjustment for gains included in net income		(771	)		270			(501	)
Net unrealized gains		36,948			(12,932	)		24,016
Fair value of derivative instruments designated as cash flow hedges
Change in fair value of derivative instruments designated as cash flow hedges during the period	$	—		$	—		$	—
Reclassification adjustment for losses included in net income		—			—			—
Fair value of derivative instruments designated as cash flow hedges		—			—			—
Total other comprehensive income	$	36,948		$	(12,932	)	$	24,016
	2013
(Dollars in thousands)	Before Tax			Tax Benefit			Net-of-Tax Amount
Unrealized loss on securities:
Unrealized holding losses arising during the period	$	(62,095	)	$	21,733		$	(40,362	)
Reclassification adjustment for gains included in net income		(2,277	)		797			(1,480	)
Net unrealized losses		(64,372	)		22,530			(41,842	)
Fair value of derivative instruments designated as cash flow hedges
Change in fair value of derivative instruments designated as cash flow hedges during the period	$	953		$	(333	)	$	620
Reclassification adjustment for losses included in net income		391			(137	)		254
Fair value of derivative instruments designated as cash flow hedges		1,344			(470	)		874
Total other comprehensive loss	$	(63,028	)	$	22,060		$	(40,968	)
	2012
(Dollars in thousands)	Before Tax			Tax Expense			Net-of-Tax Amount
Unrealized loss on securities:
Unrealized holding gains arising during the period	$	2,174		$	(761	)	$	1,413
Reclassification adjustment for gains included in net income		(3,739	)		1,308			(2,431	)
Net unrealized losses		(1,565	)		547			(1,018	)
Fair value of derivative instruments designated as cash flow hedges
Change in fair value of derivative instruments designated as cash flow hedges during the period	$	(22	)	$	8		$	(14	)
Reclassification adjustment for losses included in net income		1,618			(566	)		1,052
Fair value of derivative instruments designated as cash flow hedges		1,596			(558	)		1,038
Total other comprehensive income	$	31		$	(11	)	$	20

108

NOTE 19 – CAPITAL REQUIREMENTS AND OTHER REGULATORY MATTERS

The Company and IBERIABANK are subject to various regulatory capital requirements administered by the federal and state banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s consolidated financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and IBERIABANK, as applicable, must meet specific capital guidelines that involve quantitative measures of their assets, liabilities and certain off-balance sheet items as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors.

Quantitative measures established by regulation to ensure capital adequacy require the Company and IBERIABANK to maintain minimum amounts and ratios of total and Tier 1 capital to risk-weighted assets and of Tier 1 capital to average assets. Management believes, as of December 31, 2014 and 2013, that the Company and IBERIABANK met all capital adequacy requirements to which they are subject.

As of December 31, 2014, the most recent notification from the FDIC categorized IBERIABANK as well capitalized under the regulatory framework for prompt corrective action (the prompt corrective action requirements are not applicable to the Company). To be categorized as well capitalized, an institution must maintain minimum total risk-based, Tier 1 risk-based and Tier 1 leverage ratios as set forth in the following table. There are no conditions or events since the notification that management believes have changed that categorization. The Company’s and IBERIABANK’s actual capital amounts and ratios as of December 31 are presented in the following table.

(Dollars in thousands)	2014
	Minimum					Well Capitalized					Actual
	Amount		Ratio			Amount		Ratio			Amount		Ratio
Tier 1 Leverage
Consolidated	$	602,387		4.00	%	$	N/A		N/A	%	$	1,408,842		9.36	%
IBERIABANK		600,149		4.00			750,186		5.00			1,266,241		8.44
Tier 1 risk-based capital
Consolidated	$	504,114		4.00	%	$	N/A		N/A	%	$	1,408,842		11.18	%
IBERIABANK		502,421		4.00			753,631		6.00			1,266,241		10.08
Total risk-based capital
Consolidated	$	1,008,227		8.00	%	$	N/A		N/A	%	$	1,550,789		12.31	%
IBERIABANK		1,004,841		8.00			1,256,052		10.00			1,408,188		11.21
	2013
	Minimum					Well Capitalized					Actual
	Amount		Ratio			Amount		Ratio			Amount		Ratio
Tier 1 Leverage
Consolidated	$	507,760		4.00	%	$	N/A		N/A	%	$	1,231,886		9.70	%
IBERIABANK		505,723		4.00			632,154		5.00			1,069,783		8.46
Tier 1 risk-based capital
Consolidated	$	426,002		4.00	%	$	N/A		N/A	%	$	1,231,886		11.57	%
IBERIABANK		424,578		4.00			636,868		6.00			1,069,783		10.08
Total risk-based capital
Consolidated	$	852,005		8.00	%	$	N/A		N/A	%	$	1,365,280		12.82	%
IBERIABANK		849,157		8.00			1,061,446		10.00			1,202,738		11.33

109

NOTE 20 – SHARE-BASED COMPENSATION

The Company has various types of share-based compensation plans. These plans are administered by the Compensation Committee of the Board of Directors, which selects persons eligible to receive awards and determines the number of shares and/or options subject to each award, the terms, conditions and other provisions of the awards. During the years ended December 31, 2014 and 2013, the Company did not have any equity awards that were settled in cash.

Stock option awards

The Company issues stock options under various plans to directors, officers and other key employees. The option exercise price cannot be less than the fair value of the underlying common stock as of the date of the option grant and the maximum option term cannot exceed ten years. The stock options granted were issued with vesting periods ranging from one-and-a half to seven years. At December 31, 2014, future option or restricted stock awards of 1,038,945 shares could be made under approved incentive compensation plans.

The following table represents the compensation expense that is included in non-interest expense and related income tax benefits in the accompanying consolidated statements of comprehensive income related to stock options for the years ended December 31:

(Dollars in thousands, except per share data)	2014		2013		2012
Compensation expense related to stock options	$	2,053	$	2,110	$	1,873
Income tax benefit related to stock options		719		739		656
Impact on basic earnings per share		0.04		0.05		0.04
Impact on diluted earnings per share		0.04		0.05		0.04
Proceeds from the exercise of stock options	$	11,693	$	8,101	$	2,813
Excess tax benefits related to the exercise of stock options		2,105		886		1,221

The Company uses the Black-Scholes option pricing model to estimate the fair value of stock option awards. The following weighted-average assumptions were used for option awards issued during the years ended December 31:

	2014			2013			2012
Expected dividends		2.1	%		2.6	%		2.7	%
Expected volatility		35.8	%		34.8	%		40.1	%
Risk-free interest rate		2.3	%		1.7	%		0.8	%
Expected term (in years)		7.5			8.6			5.00
Weighted-average grant-date fair value	$	21.26		$	15.37		$	14.50

The assumptions above are based on multiple factors, including historical stock option exercise patterns and post-vesting employment termination behaviors, expected future exercise patterns and the expected volatility of the Company’s stock price.

At December 31, 2014, there was $3.2 million of unrecognized compensation cost related to stock options that is expected to be recognized over a weighted-average period of 5.1 years.

110

The following table represents the activity related to stock options during the periods indicated.

	Number of shares			Weighted Average Exercise Price		Aggregate Intrinsic Value (Dollars in thousands)		Weighted Average Remaining Contract Life (in years)
Outstanding options, December 31, 2011		1,097,620		$	50.14
Granted		230,665			51.69
Issued in connection with acquisition		32,863			41.30
Exercised		(92,092	)		30.43	$	1,765
Forfeited or expired		(32,981	)		56.79
Outstanding options, December 31, 2012		1,236,075		$	51.48
Granted		75,722			52.36
Exercised		(200,748	)		40.35		2,740
Forfeited or expired		(38,220	)		55.87
Outstanding options, December 31, 2013		1,072,829		$	53.47
Granted		77,434			65.31
Exercised		(267,421	)		48.57		4,612
Forfeited or expired		(15,160	)		60.38
Outstanding options, December 31, 2014		867,682		$	55.92		8,220		5.1
Exercisable options, December 31, 2012		792,444			50.05
Exercisable options, December 31, 2013		707,934			53.54
Exercisable options, December 31, 2014		562,752			55.92	$	5,449		3.7

The following table presents weighted average remaining life as of December 31, 2014 for options outstanding within the stated exercise prices:

	Options Outstanding						Options Exercisable
Exercise Price Range Per Share	Number of Options		Weighted Average Exercise Price		Weighted Average Remaining Life		Number of Options		Weighted Average Exercise Price
$34.33 to $51.69		182,416	$	49.24		4.3 Years		118,312	$	48.53
$51.70 to $52.35		111,197		52.33		7.1 Years		43,156		52.33
$52.36 to $54.68		146,995		53.43		6.5 Years		90,146		54.10
$54.69 to $57.60		142,360		56.52		3.7 Years		120,873		56.68
$57.61 to $59.83		105,666		58.38		1.5 Years		105,666		58.38
$59.84 to $111.71		179,048		65.06		6.7 Years		84,599		65.89
Total options		867,682	$	55.92		5.1 Years		562,752	$	55.92

Restricted stock awards

The Company issues restricted stock under various plans for certain officers and directors. The 2005, 2008, and 2010 Incentive Plans allow grants of restricted stock. The plans allow for the issuance of restricted stock awards that may not be sold or otherwise transferred until certain restrictions have lapsed. The holders of the restricted stock receive dividends and have the right to vote the shares. The fair value of the restricted stock shares awarded under these plans is recorded as unearned share-based compensation, a contra-equity account. The unearned compensation related to these awards is amortized to compensation expense over the vesting period (generally three to seven years). The total share-based compensation expense for these awards is determined based on the market price of the Company’s common stock at the date of grant applied to the total number of shares granted and is amortized over the vesting period. As of December 31, 2014 and 2013, unearned share-based compensation associated with these awards totaled $19.8 million and $21.1 million, respectively.

The following table represents the compensation expense that was included in non-interest expense in the accompanying consolidated statements of comprehensive income related to restricted stock grants for the years ended December 31:

(Dollars in thousands)	2014		2013		2012
Compensation expense related to restricted stock	$	9,932	$	8,593	$	8,035

111

The following table represents unvested restricted stock award activity for the years ended December 31:

	2014			2013			2012
Balance at beginning of period		523,756			538,202			512,112
Granted		149,072			167,095			176,669
Forfeited		(167,550	)		(28,713	)		(13,164	)
Earned and issued		(18,171	)		(152,828	)		(137,415	)
Balance at end of period		487,107			523,756			538,202

Phantom stock awards

As part of the IBKC Phantom Award Plan, the 2009 Phantom Stock Plan, and the 2014 Phantom Stock Plan, the Company issues phantom stock awards to certain key officers and employees. The award is subject to a vesting period of five to seven years and is paid out in cash upon vesting. The amount paid per vesting period is calculated as the number of vested “share equivalents” multiplied by the closing market price of a share of the Company’s common stock on the vesting date. Share equivalents are calculated on the date of grant as the total award’s dollar value divided by the closing market price of a share of the Company’s common stock on the grant date. Award recipients are also entitled to a “dividend equivalent” on each unvested share equivalent held by the award recipient. A dividend equivalent is a dollar amount equal to the cash dividends that the participant would have been entitled to receive if the participant’s share equivalents were issued in shares of common stock. Dividend equivalents will be deemed to be reinvested as share equivalents that will vest and be paid out on the same date as the underlying share equivalents on which the dividend equivalents were paid. The number of share equivalents acquired with a dividend equivalent is determined by dividing the aggregate of dividend equivalents paid on the unvested share equivalents by the closing price of a share of the Company’s common stock on the dividend payment date.

The following table indicates compensation expense recorded for phantom stock based on the number of share equivalents vested at December 31 of the periods indicated and the current market price of the Company’s stock at that time.

(Dollars in thousands)	2014		2013		2012
Compensation expense related to phantom stock	$	5,496	$	4,855	$	2,185

The following table represents phantom stock award activity during the periods indicated.

	Number of share equivalents			Dividend equivalents			Total share equivalents			Value of share equivalents (1)
Balance, December 31, 2011		232,921			8,942			241,863		$	11,924,000
Granted		119,038			9,152			128,190			6,297,000
Forfeited share equivalents		(10,949	)		(367	)		(11,316	)		556,000
Vested share equivalents		(22,281	)		(1,692	)		(23,973	)		1,180,000
Balance, December 31, 2012		318,729			16,035			334,764		$	16,444,000
Granted		169,662			11,189			180,851			11,366,000
Forfeited share equivalents		(18,975	)		(785	)		(19,760	)		1,242,000
Vested share equivalents		(52,178	)		(4,088	)		(56,266	)		2,922,000
Balance, December 31, 2013		417,238			22,351			439,589		$	27,628,000
Granted		118,859			9,566			128,425			8,328,000
Forfeited share equivalents		(19,736	)		(1,754	)		(21,490	)		1,394,000
Vested share equivalents		(75,331	)		(7,515	)		(82,846	)		5,512,000
Balance, December 31, 2014		441,030			22,648			463,678		$	30,070,000

⁽¹⁾  Except for share equivalents at the beginning of each period, which are based on the value at that time, and vested share payments, which are based on the cash paid at the time of vesting, the value of share equivalents is calculated based on the market price of the Company’s stock at the end of the respective periods. The market price of the Company’s stock was $64.85, $62.85 and $49.12 on December 31, 2014, 2013 and 2012, respectively.

Restricted Share Units

In 2014, the Company issued shares of restricted share units to some of the executive officers. Restricted share units vest after the end of a three-year performance period, based on satisfaction of the performance conditions set forth in the restricted share unit agreement. Recipients do not possess voting or investment power over the common stock underlying such units until vesting. The value of these restricted share units is the same as the value of the corresponding number of shares of common stock.

Performance Units

In 2014, the Company issued shares of performance units to some of the executive officers. Performance units vest after the end of a three-year performance period, based on satisfaction of the performance conditions set forth in the performance unit agreement. Performance units are tied to the value of shares of the Company’s common stock, are payable in cash, and vest in increments of one-third per year after attainment of one or more performance measures. The value of performance unit is the same as the value of the corresponding number of shares of common stock.

401(k) defined contribution plan

The Company has a 401(k) Profit Sharing Plan covering substantially all of its employees. Annual employer contributions to the plan are set by the Board of Directors. The Company made contributions of $1.5 million, $1.3 million, and $1.3 million for the years ended December 31, 2014, 2013, and 2012, respectively. The Plan provides, among other things, that participants in the Plan be able to direct the investment of their account balances within the Profit Sharing Plan into alternative investment funds. Participant deferrals under the salary reduction election may be matched by the employer based on a percentage to be determined annually by the employer.

112

NOTE 21 – COMMITMENTS AND CONTINGENCIES

Off-balance sheet commitments

The Company is party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments of the Company to extend credit and standby letters of credit to or on behalf of particular customers. Such commitments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the consolidated balance sheets. The credit policies used for these commitments are consistent with those used for on-balance sheet instruments. The Company’s exposure to credit loss in the event of nonperformance by its customers under such commitments or standby letters of credit represents the contractual amount of the financial instruments as indicated in the table below. At December 31, 2014 and 2013, the fair value of guarantees under commercial and standby letters of credit was $1.3 million and $1.1 million, respectively. This fair value amount represents the unamortized fee associated with these guarantees and is included in “Other liabilities” on the consolidated balance sheets of the Company. This fair value will decrease as the existing commercial and standby letters of credit approach their expiration dates.

At December 31, the Company had the following financial instruments outstanding, whose contract amounts represent credit risk:

(Dollars in thousands)	2014		2013
Commitments to grant loans	$	161,350	$	221,627
Unfunded commitments under lines of credit		4,007,954		3,326,448
Commercial and standby letters of credit		134,882		105,026
Reserve for unfunded lending commitments		11,801		11,147

Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to be drawn upon, the total commitment amounts generally represent future cash requirements. The Company evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral, if any, is based on management’s credit evaluation of the counterparty.

Unfunded commitments under commercial lines-of-credit, revolving credit lines and overdraft protection agreements are commitments for possible future extensions of credit to existing customers. Many of these types of commitments do not contain a specified maturity date and may not be drawn upon to the total extent to which the Company is committed. See Note 7 for additional discussion related to the Company’s unfunded lending commitments.

Commercial and standby letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. These guarantees are primarily issued to support public and private borrowing arrangements, including commercial paper issuance, bond financing, and similar transactions. The credit risk involved in issuing letters or credit is essentially the same as that involved in extending loan facilities to customers and as such, are collateralized when necessary, generally in the form of marketable securities and cash equivalents.

Legal proceedings

The nature of the business of the Company’s banking and other subsidiaries ordinarily results in a certain amount of claims, litigation, investigations and legal and administrative cases and proceedings, all of which are considered incidental to the normal conduct of business. Some of these claims are against entities or assets of which the Company is a successor or acquired in business acquisitions, and certain of these claims will be covered by loss sharing agreements with the FDIC. The Company has asserted defenses to these litigations and, with respect to such legal proceedings, intends to continue to defend itself vigorously, litigating or settling cases according to management’s judgment as to what is in the best interest of the Company and its shareholders.

The Company assesses its liabilities and contingencies in connection with outstanding legal proceedings utilizing the latest information available. Where it is probable that the Company will incur a loss and the amount of the loss can be reasonably estimated, the Company records a liability in its consolidated financial statements. These legal reserves may be increased or decreased to reflect any relevant developments on a quarterly basis. Where a loss is not probable or the amount of loss is not estimable, the Company does not accrue legal reserves. While the outcome of legal proceedings is inherently uncertain, based on information currently available, advice of counsel and available insurance coverage, the Company’s management believes that it has established appropriate legal reserves. Any liabilities arising from pending legal proceedings are not expected to have a material adverse effect on the Company’s consolidated financial position, consolidated results of operations or consolidated cash flows. However, in the event of unexpected future developments, it is possible that the ultimate resolution of these matters, if unfavorable, may be material to the Company’s consolidated financial position, consolidated results of operations or consolidated cash flows.

As of the date of this filing, the Company believes the amount of losses associated with legal proceedings that it is reasonably possible to incur above amounts already accrued is immaterial.

113

NOTE 22 – RELATED PARTY TRANSACTIONS

In the ordinary course of business, the Company has granted loans to executive officers and directors and their affiliates amounting to $0.1 million and $0.1 million at December 31, 2014 and 2013, respectively. During the years ended December 31, 2014, 2013, and 2012, total principal additions were $60,000, $41,000, and $252,000, respectively. Total principal payments were $0.1 million, $0.7 million, and $0.9 million for the years ended December 31, 2014, 2013, and 2012, respectively. Unfunded commitments to executive officers and directors and their affiliates totaled $30,000 and $37,000 at December 31, 2014 and 2013, respectively. None of the related party loans were classified as nonaccrual, past due, restructured or potential problem loans at December 31, 2014 or 2013.

Deposits from related parties held by the Company through IBERIABANK at December 31, 2014 and 2013 amounted to $3.0 million and $5.9 million, respectively.

NOTE 23 – FAIR VALUE MEASUREMENTS

Fair value option

The Company may elect the fair value option, which permits the Company to choose to measure eligible financial assets and liabilities at fair value at specified election dates and recognize prospective changes in unrealized gains and losses on items for which the fair value option has been elected in earnings at each reporting date.

Beginning in 2013, the Company elected the fair value option for certain originated residential mortgage loans held for sale, which allows for a more effective offset of the changes in fair values of the loans and the derivative instruments used to hedge them without the burden of complying with the requirements for hedge accounting.

The following table summarizes the difference between the aggregate fair value and the aggregate unpaid principal balance for mortgage loans held for sale measured at fair value:

	December 31, 2014						December 31, 2013
(Dollars in thousands)	Aggregate Fair Value		Aggregate Unpaid Principal		Aggregate Fair Value Less Unpaid Principal		Aggregate Fair Value		Aggregate Unpaid Principal		Aggregate Fair Value Less Unpaid Principal
Mortgage loans held for sale, at fair value	$	139,950	$	134,639	$	5,311	$	97,273	$	96,875	$	398

Interest income on mortgage loans held for sale is recognized based on contractual rates and is reflected in interest income on loans held for sale in the consolidated statements of comprehensive income. Net losses resulting from the change in fair value of these loans that were recorded in mortgage income in the consolidated statement of comprehensive income for the year ended December 31, 2014 totaled $3.5 million, while net gains resulting from the change in fair value of these loans were $0.4 million for year ended December 31, 2013. There were no net gains or losses recorded in mortgage income for the year ended December 31, 2012 resulting from the change in fair value of loans accounted for under the fair value option. The changes in fair value are mostly offset by economic hedging activities, with an immaterial portion of these changes attributable to changes in instrument-specific credit risk.

114

Items measured at fair value on a recurring basis

The Company has segregated all financial assets and liabilities that are measured at fair value on a recurring basis into the most appropriate level within the fair value hierarchy based on the inputs used to estimate the fair value at the measurement date in the tables below.

(Dollars in thousands)	December 31, 2014
	Level 1		Level 2		Level 3		Total
Assets
Available for sale securities	$	—	$	2,158,853	$	—	$	2,158,853
Mortgage loans held for sale		—		139,950		—		139,950
Derivative instruments		—		32,903		—		32,903
Total	$	—	$	2,331,706	$	—	$	2,331,706
Liabilities
Derivative instruments		—		31,354		—		31,354
Total	$	—	$	31,354	$	—	$	31,354
	December 31, 2013
	Level 1		Level 2		Level3		Total
Assets
Available for sale securities	$	15,496	$	1,921,301	$	—	$	1,936,797
Mortgage loans held for sale		—		97,273		—		97,273
Derivative instruments		—		30,076		—		30,076
Total	$	15,496	$	2,048,650	$	—	$	2,064,146
Liabilities
Derivative instruments		—		26,735		—		26,735
Total	$	—	$	26,735	$	—	$	26,735

During 2014, available for sale securities with a market value of $14.4 million were transferred from the Level 1 to Level 2 fair value category in the table above. The security was issued by Freddie Mac and was included in the Level 1 category at December 31, 2013 based on a recent trade price in the open market.

Gains and losses (realized and unrealized) included in earnings (or accumulated other comprehensive income) during 2014 related to assets and liabilities measured at fair value on a recurring basis are reported in non-interest income or other comprehensive income as follows:

(Dollars in thousands)	Noninterest income			Other comprehensive income
Total gains (losses) included in earnings	$	(7,348	)	$	—
Change in unrealized gains (losses) relating to assets still held at December 31, 2014		—			24,016

115

Items measured at fair value on a non-recurring basis

The Company has segregated all financial assets and liabilities that are measured at fair value on a non-recurring basis into the most appropriate level within the fair value hierarchy based on the inputs used to determine the fair value at the measurement date in the tables below.

(Dollars in thousands)	December 31, 2014
	Level 1		Level 2		Level 3		Total
Assets
Loans	$	—	$	4,864	$	—	$	4,864
OREO		—		1,483		—		1,483
Total	$	—	$	6,347	$	—	$	6,347
(Dollars in thousands)	December 31, 2013
	Level 1		Level 2		Level 3		Total
Assets
Loans	$	—	$	3,070	$	—	$	3,070
Mortgage loans held for sale		—		11,876		—		11,876
OREO		—		14,598		—		14,598
Total	$	—	$	29,544	$	—	$	29,544

The tables above exclude the initial measurement of assets and liabilities that were acquired as part of the acquisitions completed in 2011 through 2014. These assets and liabilities were recorded at their fair value upon acquisition in accordance with U.S. GAAP and were not re-measured during the periods presented unless specifically required by U.S. GAAP. Acquisition date fair values represent either Level 2 fair value measurements (investment securities, OREO, property, equipment, and debt) or Level 3 fair value measurements (loans, deposits, and core deposit intangible asset).

The Company did not record any liabilities at fair value for which measurement of the fair value was made on a nonrecurring basis during the years ended December 31, 2014, 2013 and 2012.

NOTE 24 – FAIR VALUE OF FINANCIAL INSTRUMENTS

The estimated fair value of a financial instrument is the current amount that would be exchanged between willing parties, other than in a forced liquidation. Fair value is best determined based upon quoted market prices. However, in many instances, there are no quoted market prices for the Company’s various financial instruments. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. Accordingly, the fair value estimates may not be realized in an immediate settlement of the instrument. ASC Topic 825 excludes certain financial instruments and all non-financial instruments from its disclosure requirements. Accordingly, the aggregate fair value amounts presented may not necessarily represent the underlying fair value of the Company.

The following methods and assumptions were used to estimate the fair value of each class of financial instruments for which it is practicable to estimate that value. Refer to Note 1 to these consolidated financial statements for the methods and assumptions used to measure the fair value of investment securities and derivative instruments.

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Cash and cash equivalents

The carrying amounts of cash and cash equivalents approximate their fair value.

Loans

The fair values of non-covered mortgage loans are estimated based on present values using entry-value rates (the interest rate that would be charged for a similar loan to a borrower with similar risk at the indicated balance sheet date) at December 31, 2014 and 2013, weighted for varying maturity dates. Other non-covered loans are valued based on present values using entry-value interest rates at December 31, 2014 and 2013 applicable to each category of loans, which would be classified within Level 3 of the hierarchy. Fair values of mortgage loans held for sale are based on commitments on hand from investors or prevailing market prices, a Level 2 measurement. Covered loans are measured using projections of expected cash flows, exclusive of the shared-loss agreements with the FDIC. Fair value of the covered loans included in the table below reflects the current fair value of these loans, which is based on an updated estimate of the projected cash flow as of the dates indicated. The fair value associated with the loans includes estimates related to expected prepayments and the amount and timing of undiscounted expected principal, interest and other cash flows, which also would be classified within Level 3 of the hierarchy.

Accrued Interest Receivable and Accrued Interest Payable

The carrying amount of accrued interest approximates fair value because of the short maturity of these financial instruments.

FDIC Loss Share Receivable

The fair value is determined using projected cash flows from loss sharing agreements based on expected reimbursements for losses at the applicable loss sharing percentages based on the terms of the loss share agreements. Cash flows are discounted to reflect the timing and receipt of the loss sharing reimbursements from the FDIC. The fair value of the Company’s FDIC loss share receivable would be categorized within Level 3 of the hierarchy.

Deposits

The fair values of NOW accounts, money market deposits and savings accounts are the amounts payable on demand at the reporting date. Certificates of deposit were valued using a discounted cash flow model based on the weighted-average rate at December 31, 2014 and 2013 for deposits with similar remaining maturities. The fair value of the Company’s deposits would therefore be categorized within Level 3 of the fair value hierarchy.

Short-term borrowings

The carrying amounts of short-term borrowings maturing within ninety days approximate their fair values.

Long-term debt

The fair values of long-term debt are estimated using discounted cash flow analyses based on the Company’s current incremental borrowing rates for similar types of borrowing arrangements. The fair value of the Company’s long-term debt would therefore be categorized within Level 3 of the fair value hierarchy.

Off-balance sheet items

The Company has outstanding commitments to extend credit and standby letters of credit. These off-balance sheet financial instruments are generally exercisable at the market rate prevailing at the date the underlying transaction will be completed. At December 31, 2014 and 2013, the fair value of guarantees under commercial and standby letters of credit was immaterial.

The estimated fair values and carrying amounts of the Company’s financial instruments are as follows:

	December 31, 2014				December 31, 2013
(Dollars in thousands)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Financial Assets
Cash and cash equivalents	$	548,095	$	548,095	$	391,396	$	391,396
Investment securities		2,275,813		2,278,334		2,090,906		2,089,363
Loans and loans held for sale, net of unearned income		11,581,116		11,605,446		9,620,461		9,724,432
FDIC loss share receivable		69,627		19,606		162,312		21,918
Derivative instruments		32,903		32,903		30,076		30,076
Accrued interest receivable		37,696		37,696		32,143		32,143
Financial Liabilities
Deposits	$	12,520,525	$	12,298,017	$	10,737,000	$	10,226,573
Short-term borrowings		845,742		845,742		680,344		680,344
Long-term debt		403,254		376,139		280,699		235,503
Derivative instruments		31,354		31,354		26,735		26,735
Accrued interest payable		8,258		8,258		6,102		6,102

117

The fair value estimates presented herein are based upon pertinent information available to management as of December 31, 2014 and 2013. Although management is not aware of any factors that would significantly affect the estimated fair value amounts, such amounts have not been comprehensively revalued for purposes of these financial statements since that date and, therefore, current estimates of fair value may differ significantly from the amounts presented herein.

NOTE 25 – RESTRICTIONS ON DIVIDENDS, LOANS AND ADVANCES

IBERIABANK is restricted under applicable laws in the payment of dividends to an amount equal to current year earnings plus undistributed earnings for the immediately preceding year, unless prior permission is received from the Commissioner of Financial Institutions for the State of Louisiana. Dividends payable by IBERIABANK in 2015 without permission will be limited to 2015 earnings plus an additional $108.4 million.

Funds available for loans or advances by IBERIABANK to the Company amounted to $140.8 million. In addition, any dividends that may be paid by IBERIABANK to the Company would be prohibited if the effect thereof would cause IBERIABANK’s capital to be reduced below applicable minimum capital requirements.

During any deferral period under the Company’s junior subordinated debt, the Company would be prohibited from declaring and paying dividends to common shareholders. See Note 16 to the consolidated financial statements for additional information.

NOTE 26 – BUSINESS SEGMENTS

Each of the Company’s reportable operating segments is a business unit that serves the specific needs of the Company’s customers based on the products and services it offers. The reportable segments are based upon those revenue-producing components for which separate financial information is produced internally and are subject to evaluation by the chief operating decision maker in deciding how to allocate resources to segments. The Company reports the results of its operations through three business segments: IBERIABANK, IMC, and LTC.

The IBERIABANK segment represents the Company’s commercial and retail banking functions including its lending, investment, and deposit activities. IBERIABANK also includes the Company’s wealth management, capital markets, and other corporate functions that are not specifically related to a strategic business unit. The IMC segment represents the Company’s origination, funding and subsequent sale of one-to-four family residential mortgage loans. The LTC segment represents the Company’s title insurance and loan closing services. Certain expenses not directly attributable to a specific reportable segment are allocated to segments based on pre-determined means that reflect utilization.

Also within IBERIABANK are certain reconciling items in order to translate reportable segment results into consolidated results. The following tables present certain information regarding our operations by reportable segment, including a reconciliation of segment results to reported consolidated results for the periods presented. Reconciling items between segment results and reported results include:

• Elimination of interest income and interest expense representing interest earned by IBERIABANK on interest-bearing checking accounts held by related companies, as well as the elimination of the related deposit balances at the IBERIABANK segment;

• Elimination of investment in subsidiary balances on certain operating segments included in total and average segment assets; and

• Elimination of intercompany due to and due from balances on certain operating segments that are included in total and average segment assets.

IBERIABANK is considered a reportable segment based on the quantitative thresholds specified within ASC Topic 280, Segment Reporting (“ASC 280”). The Company’s wealth management, capital markets and trust operating segments are aggregated within the IBERIABANK reportable operating segment because they do not meet the thresholds specified by ASC 280 and based on the qualitative factors presented within ASC 280. The Company’s IMC and LTC segments do not meet the quantitative thresholds specified by ASC 280, but are reported because management believes information about those segments is useful to users of the financial statements.

118

(Dollars in thousands)	Year Ended December 31, 2014
	IBERIABANK			IMC			LTC			Consolidated
Interest income	$	498,820		$	5,992		$	3		$	504,815
Interest expense		42,983			1,721			—			44,704
Net interest income		455,837			4,271			3			460,111
Provision for loan losses		18,966			94			—			19,060
Mortgage income		71			51,726			—			51,797
Title income		—			—			20,492			20,492
Other non-interest income		101,401			(61	)		(1	)		101,339
Core deposit intangible amortization		5,569			—			—			5,569
Allocated expenses		(11,602	)		8,203			3,399			—
Other non-interest expenses		407,461			44,761			16,688			468,910
Income before income taxes		136,915			2,878			407			140,200
Income tax provision		33,419			1,148			183			34,750
Net income	$	103,496		$	1,730		$	224		$	105,450
Total loans and loans held for sale, net of unearned income	$	11,415,973		$	165,143		$	—		$	11,581,116
Total assets		15,538,432			194,156			26,017			15,758,605
Total deposits		12,515,329			5,196			—			12,520,525
Average assets		14,431,459			176,003			25,223			14,632,685
(Dollars in thousands)	Year Ended December 31, 2013
	IBERIABANK			IMC			LTC			Consolidated
Interest income	$	431,418		$	5,747		$	32		$	437,197
Interest expense		45,150			1,803			—			46,953
Net interest income		386,268			3,944			32			390,244
Provision for loan losses		5,123			22			—			5,145
Mortgage income		2			64,195			—			64,197
Title income		—			—			20,526			20,526
Other non-interest income		84,243			(10	)		2			84,235
Core deposit intangible amortization		4,499			—			—			4,499
Allocated expenses		(7,453	)		5,417			2,036			—
Other non-interest expenses		402,170			49,723			16,693			468,586
Income before income taxes		66,174			12,967			1,831			80,972
Income tax provision		10,035			5,093			741			15,869
Net income	$	56,139		$	7,874		$	1,090		$	65,103
Total loans and loans held for sale, net of unearned income	$	9,472,908		$	147,553		$	—		$	9,620,461
Total assets		13,167,162			173,131			25,257			13,365,550
Total deposits		10,734,030			2,970			—			10,737,000
Average assets		12,794,997			183,513			25,478			13,003,988

119

(Dollars in thousands)	Year Ended December 31, 2012
	IBERIABANK			IMC			LTC		Consolidated
Interest income	$	439,245		$	5,858		$	97	$	445,200
Interest expense		61,349			2,101			—		63,450
Net interest income		377,896			3,757			97		381,750
Provision for loan losses		20,550			121			—		20,671
Mortgage income		6			78,047			—		78,053
Title income		—			—			20,987		20,987
Other non-interest income		76,967			(10	)		—		76,957
Core deposit intangible amortization		4,900			—			—		4,900
Allocated expenses		(3,282	)		2,340			942		—
Other non-interest expenses		361,428			49,084			16,773		427,285
Income before income taxes		71,273			30,249			3,369		104,891
Income tax provision		15,192			11,871			1,433		28,496
Net income	$	56,081		$	18,378		$	1,936	$	76,395
Total loans and loans held for sale, net of unearned income	$	8,485,363		$	280,692		$	—	$	8,766,055
Total assets		12,796,811			308,152			24,715		13,129,678
Total deposits		10,745,528			2,749			—		10,748,277
Average assets		11,879,761			194,832			22,379		12,096,972

NOTE 27 – CONDENSED PARENT COMPANY ONLY FINANCIAL STATEMENTS

Condensed financial statements of IBERIABANK Corporation (parent company only) are shown below. The parent company has no significant operating activities.

Condensed Balance Sheets

(Dollars in thousands)	December 31
	2014		2013
Assets
Cash in bank	$	36,064	$	98,108
Investment in subsidiaries		1,842,120		1,487,337
Other assets		119,494		80,528
	$	1,997,678	$	1,665,973
Liabilities and Shareholders’ Equity
Liabilities	$	144,829	$	134,994
Shareholders’ Equity		1,852,849		1,530,979
	$	1,997,678	$	1,665,973

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Condensed Statements of Income

(Dollars in thousands)	Year Ended December 31
	2014			2013			2012
Operating income
Dividends from bank subsidiary	$	—		$	49,000		$	70,000
Dividends from non-bank subsidiaries		—			1,511			—
Reimbursement of management expenses		46,433			34,474			94,053
Other income		437			869			(836	)
Total operating income		46,870			85,854			163,217
Operating expenses
Interest expense		3,224			3,232			3,427
Salaries and employee benefits expense		31,981			29,159			76,527
Other expenses		14,576			13,676			47,309
Total operating expenses		49,781			46,067			127,263
Income (loss) before income tax benefit and increase in equity in undistributed earnings of subsidiaries		(2,911	)		39,787			35,954
Income tax benefit		(518	)		(2,808	)		(11,842	)
Income (loss) before equity in undistributed earnings of subsidiaries		(2,393	)		42,595			47,796
Equity in undistributed earnings of subsidiaries		107,843			22,508			28,599
Net income	$	105,450		$	65,103		$	76,395

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Condensed Statements of Cash Flows

(Dollars in thousands)	Year Ended December 31
	2014			2013			2012
Cash Flow from Operating Activities
Net income	$	105,450		$	65,103		$	76,395
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		595			2,035			4,926
Net income of subsidiaries		(107,843	)		(73,019	)		(98,599	)
Noncash compensation expense		11,984			10,704			9,907
Loss on sale of assets		—			—			7
Derivative losses on swaps		—			—			2
Tax benefit associated with share-based payment arrangements		(2,105	)		(886	)		(1,221	)
Other, net		(27,273	)		7,574			(10,557	)
Net Cash (Used in) Provided by Operating Activities		(19,192	)		11,511			(19,140	)
Cash Flow from Investing Activities
Cash received in excess of cash paid in acquisition		4,783			—			1,272
Proceeds from sale of premises and equipment		—			11,751			5
Purchases of premises and equipment		(36	)		(5,247	)		(4,173	)
Capital contributed to subsidiary		(14,600	)		—			(2,000	)
Dividends received from subsidiaries		—			50,511			70,000
Acquisition		—			—			—
Net Cash Provided by (Used in) Investing Activities		(9,853	)		57,015			65,104
Cash Flow from Financing Activities
Repayments of long-term debt		—			—			(2,867	)
Dividends paid to shareholders		(43,070	)		(40,332	)		(40,069	)
Proceeds from sale of treasury stock for stock options exercised		11,693			8,101			2,813
Payments to repurchase common stock		(3,727	)		(2,280	)		(42,245	)
Common stock issued		—			—			—
Costs of issuance of common stock		—			—			—
Tax benefit associated with share-based payment arrangements		2,105			886			1,221
Net Cash Used In Financing Activities		(32,999	)		(33,625	)		(81,147	)
Net (Decrease) Increase in Cash and Cash Equivalents		(62,044	)		34,901			(35,183	)
Cash and Cash Equivalents at Beginning of Period		98,108			63,207			98,390
Cash and Cash Equivalents at End of Period	$	36,064		$	98,108		$	63,207

122

NOTE 28 – QUARTERLY RESULTS OF OPERATIONS AND SELECTED CASH FLOW DATA (UNAUDITED)

	2014
(Dollars in thousands, except per share data)	Fourth Quarter			Third Quarter			Second Quarter			First Quarter
Total interest income	$	137,276		$	133,793		$	119,514		$	114,232
Total interest expense		12,596			12,042			10,241			9,824
Net interest income		124,680			121,751			109,273			104,408
Provision for loan losses		6,495			5,714			4,748			2,103
Net interest income after provision for loan losses		118,185			116,037			104,525			102,305
Gain on sale of investments, net		164			582			8			19
Other noninterest income		46,908			46,530			43,753			35,662
Noninterest expense		119,382			120,360			127,309			107,428
Income before income taxes		45,875			42,789			20,977			30,558
Income tax expense		9,939			11,897			4,750			8,163
Net income	$	35,936		$	30,892		$	16,227		$	22,395
Preferred stock dividends		—			—			—			—
Income available to common shareholders		35,936			30,892			16,227			22,395
Earnings allocated to unvested restricted stock		(530	)		(465	)		(258	)		(405	)
Earnings available to common shareholders - Diluted	$	35,406		$	30,427		$	15,969		$	21,990
Earnings per share - Basic	$	1.08		$	0.93		$	0.53		$	0.75
Earnings per share - Diluted		1.07			0.92			0.53			0.75
Cash dividends declared per common share		0.34			0.34			0.34			0.34
	2013
	Fourth Quarter			Third Quarter			Second Quarter			First Quarter
Total interest income	$	114,092		$	108,512		$	108,177		$	106,416
Total interest expense		10,654			11,060			11,695			13,545
Net interest income		103,438			97,452			96,482			92,871
(Reversal of) Provision for loan losses		4,700			2,014			1,807			(3,377	)
Net interest income after (reversal of) provision for loan losses		98,738			95,438			94,675			96,248
Gain (loss) on sale of investments, net		19			13			(57	)		2,359
Other noninterest income		38,696			43,250			42,546			42,132
Noninterest expense		102,674			108,152			117,361			144,898
Income (loss) before income taxes		34,779			30,549			19,803			(4,159	)
Income tax expense (benefit)		9,175			7,357			4,213			(4,876	)
Net income	$	25,604		$	23,192		$	15,590		$	717
Preferred stock dividends		—			—			—			—
Income available to common shareholders		25,604			23,192			15,590			717
Earnings allocated to unvested restricted stock		(456	)		(425	)		(293	)		(20	)
Earnings available to common shareholders - Diluted	$	25,148		$	22,767		$	15,297		$	697
Earnings per share - Basic	$	0.86		$	0.78		$	0.53		$	0.02
Earnings per share - Diluted		0.86			0.78			0.53			0.02
Cash dividends declared per common share		0.34			0.34			0.34			0.34

The Company has corrected its historical consolidated quarterly statements of comprehensive income for the three-month periods ended June 30, 2014 and September 30, 2014 for the impact of errors in its mortgage banking operation and purchase accounting adjustments. The correction of these errors reduces mortgage income in the consolidated statements of comprehensive income by $4.2 million in the second quarter of 2014 and increases mortgage income by $1.5 million in the third quarter of 2014. The correction did not have an effect on the Company’s consolidated statements of comprehensive income for the year ended December 31, 2014. The error was identified through the operation of the Company’s internal controls over financial reporting. The Company implemented changes to internal processes to reduce the likelihood of similar errors occurring in future periods.

The following table presents the effect this error correction and purchase accounting adjustments had on the reported consolidated statements of comprehensive income for the periods indicated:

			Adjustment
(Dollars in thousand, except per share data)	As Previously Reported		Error Correction			Purchase Accounting			As Adjusted
Three Months Ended June 30, 2014
Net interest income	$	108,979	$	—		$	294		$	109,273
Non-interest income		47,963		(4,189	)		(13	)		43,761
Non-interest expense		127,375		(170	)		104			127,309
Income tax expense		6,271		(1,656	)		135			4,750
Net income		18,548		(2,363	)		42			16,227
Earnings per share - basic		0.60		(0.07	)		—			0.53
Earnings per share - diluted		0.60		(0.07	)		—			0.53
Three Months Ended September 30, 2014
Net interest income	$	121,041	$	—		$	710		$	121,751
Non-interest income		45,663		1,487			(38	)		47,112
Non-interest expense		120,060		170			130			120,360
Income tax expense		11,186		521			190			11,897
Net income		29,744		796			352			30,892
Earnings per share - basic		0.89		0.03			0.01			0.93
Earnings per share - diluted		0.89		0.02			0.01			0.92

123

Corporate Information

Corporate Headquarters

IBERIABANK Corporation

200 West Congress Street

Lafayette, LA 70501

337.521.4012

Corporate Mailing Address

P.O. Box 52747

Lafayette, LA 70505-2747

Annual Meeting

IBERIABANK Corporation Annual Meeting of Shareholders will be held on Tuesday, May 5, 2015 at 4:00 p.m., local time, at the Windsor Court Hotel, located at 300 Gravier Street, New Orleans, Louisiana.

Shareholder Assistance

Shareholders requesting a change of address, records or information about the Dividend Reinvestment Plan, or lost certificates should contact:

Investor Relations

Computershare

PO Box 30170

College Station, TX 77842-3170

800.368.5948

www.computershare.com/investor

For Information

Copies of the Company’s Annual Report on Form 10-K including financial statements and financial statement schedules, will be furnished to Shareholders without cost by sending a written request to Robert B. Worley, Jr., Secretary, IBERIABANK Corporation, 601 Poydras St., 21st Floor, New Orleans, Louisiana 70130. This and other information regarding IBERIABANK Corporation and its subsidiaries may be accessed from our web sites. In addition, shareholders may contact:

Daryl G. Byrd, President and CEO

337.521.4003

John R. Davis, Senior Executive Vice President

337.521.4005

Internet Addresses

www.iberiabank.com

www.iberiabankmortgage.com

www.lenderstitle.com

www.utla.com

www.iberiabankcreditcards.com

Stock Information

	MARKET PRICE						DIVIDENDS DECLARED
2014	HIGH		LOW		CLOSING
First Quarter	$	72.41	$	60.96	$	70.15	$	0.34
Second Quarter	$	71.94	$	59.20	$	69.19	$	0.34
Third Quarter	$	70.58	$	62.40	$	62.51	$	0.34
Fourth Quarter	$	70.00	$	60.53	$	64.85	$	0.34
	MARKET PRICE						DIVIDENDS DECLARED
2013	HIGH		LOW		CLOSING
First Quarter	$	52.78	$	48.73	$	50.02	$	0.34
Second Quarter	$	54.27	$	44.91	$	53.61	$	0.34
Third Quarter	$	59.81	$	51.54	$	51.91	$	0.34
Fourth Quarter	$	63.98	$	51.55	$	62.85	$	0.34

At February 19, 2015, IBERIABANK Corporation had approximately 2,286 shareholders of record.

Securities Listing

IBERIABANK Corporation’s common stock trades on the NASDAQ Global Select Market under the symbol “IBKC.” In local and national newspapers, the Company is listed under “IBERIABANK.”

Dividend Restrictions

The majority of the Company’s revenue is from dividends declared and paid to the Company by its subsidiary, IBERIABANK, which is subject to laws and regulations that limit the amount of dividends and other distributions it can pay. In addition, the Company and IBERIABANK are required to maintain capital at or above regulatory minimums and to remain “well-capitalized” under prompt corrective action regulations. The declaration and payment of dividends on the Company’s capital stock also is subject to contractual restrictions. See Note 16- Long-Term Debt, Note 19- Capital Requirements and Other Regulatory Matters and Note 25- Restrictions on Dividends, Loans and Advances to the Consolidated Financial Statements and Management’s Discussion and Analysis of Financial Condition and Results of Operations - Long-term Debt.

Dividend Investment Plan

IBERIABANK Corporation shareholders may take advantage of our Dividend Reinvestment Plan. This program provides a convenient, economical way for shareholders to increase their holdings of the Company’s common stock. The shareholder pays no brokerage commissions or service charges while participating in the plan. A nominal fee is charged at the time that an individual terminates plan participation. This plan does not currently offer participants the ability to purchase additional shares with optional cash payments.

To enroll in the IBERIABANK Corporation Dividend Reinvestment Plan, shareholders must complete an enrollment form. A summary of the plan and enrollment forms are available from the Register and Transfer Company at the address provided under Shareholder Assistance.

124

EX-21

EXHIBIT 21

SUBSIDIARIES OF THE REGISTRANT

IBERIABANK Corporation, a Louisiana corporation, is a bank holding company that has elected to become a financial holding company. The table below sets forth all of IBERIABANK Corporation’s subsidiaries as to state or jurisdiction of organization. All of the subsidiaries listed below are included in the consolidated financial statements, and no separate financial statements are submitted for any subsidiary.

Subsidiary	State or Jurisdiction of Organization
IBERIABANK	Louisiana
Acadiana Holdings, L.L.C.	Louisiana
CB Florida CRE Holdings, LLC	Florida
CB Florida RRE Holdings, LLC	Florida
CSB Alabama CRE Holdings, LLC	Alabama
CSB Alabama Sunhill Villas Holding, LLC	Alabama
CSB Alabama RRE Holdings, LLC	Alabama
CSB Florida CRE Holdings, LLC	Florida
CSB Florida Overlook Holdings, LLC	Florida
CSB Florida RRE Holdings, LLC	Florida
Finesco, LLC	Louisiana
IB SPE Management, Inc.	Louisiana
IBERIABANK Insurance Services, LLC	Louisiana
IBERIABANK Mortgage Company	Arkansas
Iberia Financial Services, L.L.C.	Louisiana
Iberia Investment Fund I, LLC	Louisiana
Iberia Investment Fund II, LLC	Louisiana
Jefferson Insurance Corporation	Louisiana
Laguna Vista, LLC	Florida
Lee Cape, LLC	Florida
North River Holdings, Inc.	Florida
OB Boatman 1 LLC	Florida
OB Boatman 2 LLC	Florida
OB Capri LLC	Florida
OB Copperhead LLC	Florida
OB Creekside LLC	Florida
OB Florida CRE Holdings, LLC	Florida
OB Florida RRE Holdings, LLC	Florida
OB FHB LLC	Florida
OB Fralin LLC	Florida
OB Keys LLC	Florida
OB Manatee Forest LLC	Florida
OB Marathon LLC	Florida
OB Marco Isle LLC	Florida
OB Meadows Terrace LLC	Florida

OB Naples LLC	Florida
OB NP LLC	Florida
OB RFB LLC	Florida
OB Waterford LLC	Florida
SB Florida CRE Holdings, LLC	Florida
SB Florida RRE Holdings, LLC	Florida
Security Mutual Financial Services, Inc.	Alabama
Lenders Title Company	Arkansas
Asset Exchange, Inc.	Arkansas
United Title of Louisiana, Inc.	Louisiana
United Title of Alabama, Inc.	Alabama
American Abstract and Title Company, Inc.	Arkansas
1887 Leasing, LLC	Louisiana
IB Aircraft Holdings, LLC	Louisiana
IBERIA Capital Partners L.L.C.	Louisiana
IBERIA CDE, L.L.C.	Louisiana
IBERIA Asset Management, Inc.	Louisiana

EX-23.1

EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the following Registration Statements:

Registration Statement (Form S-8 No. 333-135359) pertaining to the IBERIABANK Corporation Retirement Savings Plan;

Registration Statement (Form S-8 No. 333-28859) pertaining to the IBERIABANK Corporation 1996 Stock Option Plan;

Registration Statement (Form S-8 No. 333-64402) pertaining to the IBERIABANK Corporation 2001 Incentive Compensation Plan;

Registration Statement (Form S-8 No. 333-117356) pertaining to the IBERIABANK Corporation Stock Purchase Warrants;

Registration Statement (Form S-8 No. 333-130273) pertaining to the IBERIABANK Corporation 2005 Stock Incentive Plan;

Registration Statement (Form S-8 No. 333-79811) pertaining to the IBERIABANK Corporation Retirement Savings Plan;

Registration Statement (Form S-8 No. 333-81315) pertaining to the IBERIABANK Corporation 1999 Stock Option Plan;

Registration Statement (Form S-8 No. 333-41970) pertaining to the IBERIABANK Corporation Supplemental Stock Option Plan;

Registration Statement (Form S-8 No. 333-148635) pertaining to the IBERIABANK Corporation Deferred Compensation Plan;

Registration Statement (Form S-8 No. 333-151754) pertaining to the IBERIABANK Corporation 2008 Incentive Compensation Plan;

Registration Statement (Form S-8 No. 333-165877) pertaining to the IBERIABANK Corporation 2010 Stock Incentive Plan;

Registration Statement (Form S-3 No. 333-179885) of IBERIABANK Corporation;

Registration Statement (Form S-8 No. 333-174717) pertaining to the IBERIABANK Corporation 2010 Stock Incentive Plan;

Registration Statement (Form S-8 No. 333-174719) pertaining to the OMNI BANCSHARES, Inc. Amended and Restated Performance and Equity Incentive Plan of IBERIABANK Corporation;

Registration Statement (Form S-8 No. 333-184943) pertaining to the IBERIABANK Corporation Deferred Compensation Plan;

Registration Statement (Form S-8 No. 333-183220) pertaining to the Florida Gulf Bancorp, Inc. Officers’ and Employees’ Stock Option Plan of IBERIABANK Corporation;

Registration Statement (Form S-8 No. 333-198041) pertaining to the IBERIABANK Corporation Amended and Restated 2010 Stock Incentive Plan; and

Registration Statement (Form S-8 No. 333-198040) pertaining to the IBERIABANK Corporation Retirement Savings Plan;

of our reports dated March 2, 2015, with respect to the consolidated financial statements of IBERIABANK Corporation and subsidiaries, and the effectiveness of internal control over financial reporting of IBERIABANK Corporation and subsidiaries included in this Annual Report (Form 10-K) for the year ended December 31, 2014.

/s/ Ernst & Young LLP

New Orleans, Louisiana

March 2, 2015

EX-31.1

EXHIBIT 31.1

CERTIFICATIONS

SECTION 302 CERTIFICATION OF THE CHIEF EXECUTIVE OFFICER

I, Daryl G. Byrd, President and Chief Executive Officer of IBERIABANK Corporation, certify that:

1. I have reviewed this annual report on Form 10-K of IBERIABANK Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the Registrant as of, and for, the periods presented in this report;

4. The Registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the Registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the Registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the Registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the Registrant’s internal control over financial reporting that occurred during the Registrant’s most recent fiscal quarter (the Registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the Registrant’s internal control over financial reporting; and

5. The Registrant’s other certifying officers and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the Registrant’s auditors and the audit committee of the Registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the Registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the Registrant’s internal control over financial reporting.

Date: March 2, 2015	/s/ Daryl G. Byrd
	Daryl G. Byrd
	President and Chief Executive Officer

EX-31.2

EXHIBIT 31.2

SECTION 302 CERTIFICATION OF CHIEF FINANCIAL OFFICER

I, Anthony J. Restel, Senior Executive Vice President and Chief Financial Officer of IBERIABANK Corporation, certify that:

1. I have reviewed this annual report on Form 10-K of IBERIABANK Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the Registrant as of, and for, the periods presented in this report;

4. The Registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the Registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the Registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the Registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the Registrant’s internal control over financial reporting that occurred during the Registrant’s most recent fiscal quarter (the Registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the Registrant’s internal control over financial reporting; and

5. The Registrant’s other certifying officers and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the Registrant’s auditors and the audit committee of the Registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the Registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the Registrant’s internal control over financial reporting.

Date: March 2, 2015	/s/ Anthony J. Restel
	Anthony J. Restel
	Senior Executive Vice President and Chief Financial Officer

EX-32.1

EXHIBIT 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of IBERIABANK Corporation (the “Company”) on Form 10-K for the fiscal year ended December 31, 2014 (the “Report”), I, Daryl G. Byrd, President and Chief Executive Officer of the Company, certify that:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company as of and for the periods covered in the Report.

/s/ Daryl G. Byrd

Daryl G. Byrd

President and Chief Executive Officer

Date: March 2, 2015

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request. The information furnished herein shall not be deemed to be filed for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933.

EX-32.2

EXHIBIT 32.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of IBERIABANK Corporation (the “Company”) on Form 10-K for the fiscal year ended December 31, 2014 (the “Report”), I, Anthony J. Restel, Senior Executive Vice President and Chief Financial Officer of the Company, certify that:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company as of and for the periods covered in the Report.

/s/ Anthony J. Restel

Anthony J. Restel

Senior Executive Vice President and Chief Financial Officer

Date: March 2, 2015

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request. The information furnished herein shall not be deemed to be filed for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933.

XML

Investment Securities (Tables)

12 Months Ended

Dec. 31, 2014

Investments, Debt and Equity Securities [Abstract]

Schedule of Amortized Cost and Fair Values of Investment Securities, with Gross Unrealized Gains and Losses

The amortized cost and fair values of investment securities, with gross unrealized gains and losses, consist of the following:

	December 31, 2014
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	317,386	$	1,700	$	(3,533	)	$	315,553
Obligations of state and political obligations		86,513		3,679		(2	)		90,190
Mortgage-backed securities		1,741,917		16,882		(7,184	)		1,751,615
Other securities		1,460		35		—			1,495
Total securities available for sale	$	2,147,276	$	22,296	$	(10,719	)	$	2,158,853
Securities held to maturity:
U.S. Government-sponsored enterprise obligations	$	10,000	$	88	$	—		$	10,088
Obligations of state and political obligations		77,597		3,153		(145	)		80,605
Mortgage-backed securities		29,363		151		(726	)		28,788
Total securities held to maturity	$	116,960	$	3,392	$	(871	)	$	119,481
	December 31, 2013
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	406,092	$	1,382	$	(11,913	)	$	395,561
Obligations of state and political obligations		105,300		2,435		(256	)		107,479
Mortgage-backed securities		1,450,194		10,031		(27,947	)		1,432,278
Other securities		1,460		19		—			1,479
Total securities available for sale	$	1,963,046	$	13,867	$	(40,116	)	$	1,936,797
Securities held to maturity:
U.S. Government-sponsored enterprise obligations	$	34,478	$	484	$	—		$	34,962
Obligations of state and political obligations		84,290		1,463		(1,624	)		84,129
Mortgage-backed securities		35,341		258		(2,124	)		33,475
Total securities held to maturity	$	154,109	$	2,205	$	(3,748	)	$	152,566

Schedule of Exposure to Investment Security Issuers Exceed Ten Percentage of Shareholders' Equity

At December 31, 2014, the Company’s exposure to two investment security issuers individually exceeded 10% of shareholders’ equity:

(Dollars in thousands)	Amortized Cost		Market Value
Federal National Mortgage Association (Fannie Mae)	$	1,220,841	$	1,226,654
Federal Home Loan Mortgage Corporation (Freddie Mac)		707,592		706,514
	$	1,928,433	$	1,933,168

Schedule of Securities with Gross Unrealized Losses Aggregated by Investment Category

Information pertaining to securities with gross unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous loss position, is as follows:

	December 31, 2014
	Less Than Twelve Months					Over Twelve Months					Total
	Gross			Estimated		Gross			Estimated		Gross			Estimated
	Unrealized			Fair		Unrealized			Fair		Unrealized			Fair
(Dollars in thousands)	Losses			Value		Losses			Value		Losses			Value
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	—		$	—	$	(3,533	)	$	240,498	$	(3,533	)	$	240,498
Obligations of state and political obligations		(2	)		185		—			—		(2	)		185
Mortgage-backed securities		(1,189	)		304,686		(5,995	)		294,549		(7,184	)		599,235
Total securities available for sale	$	(1,191	)	$	304,871	$	(9,528	)	$	535,047	$	(10,719	)	$	839,918
Securities held to maturity:
Obligations of state and political obligations	$	(9	)	$	2,287	$	(136	)	$	8,590	$	(145	)	$	10,877
Mortgage-backed securities		—			—		(726	)		20,812		(726	)		20,812
Total securities held to maturity	$	(9	)	$	2,287	$	(862	)	$	29,402	$	(871	)	$	31,689
	December 31, 2013
	Less Than Twelve Months					Over Twelve Months					Total
	Gross			Estimated		Gross			Estimated		Gross			Estimated
	Unrealized			Fair		Unrealized			Fair		Unrealized			Fair
(Dollars in thousands)	Losses			Value		Losses			Value		Losses			Value
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	(11,764	)	$	298,515	$	(149	)	$	5,515	$	(11,913	)	$	304,030
Obligations of state and political obligations		(30	)		2,415		(226	)		1,047		(256	)		3,462
Mortgage-backed securities		(23,749	)		864,899		(4,198	)		81,870		(27,947	)		946,769
Total securities available for sale	$	(35,543	)	$	1,165,829	$	(4,573	)	$	88,432	$	(40,116	)	$	1,254,261
Securities held to maturity:
Obligations of state and political obligations	$	(1,181	)	$	29,355	$	(443	)	$	6,240	$	(1,624	)	$	35,595
Mortgage-backed securities		(952	)		12,913		(1,172	)		11,616		(2,124	)		24,529
Total securities held to maturity	$	(2,133	)	$	42,268	$	(1,615	)	$	17,856	$	(3,748	)	$	60,124

Additional Information on Securities in a Continuous Loss Position

Additional information on securities that have been in a continuous loss position for over twelve months at December 31 is presented in the following table.

(Dollars in thousands)	2014		2013
Number of securities
Issued by Fannie Mae, Freddie Mac, or Ginnie Mae		66		20
Issued by political subdivisions		5		5
		71		25
Amortized Cost Basis
Issued by Fannie Mae, Freddie Mac, or Ginnie Mae	$	566,113	$	104,520
Issued by political subdivisions		8,727		7,956
	$	574,840	$	112,476
Unrealized Loss
Issued by Fannie Mae, Freddie Mac, or Ginnie Mae	$	10,254	$	5,519
Issued by political subdivisions		136		669
	$	10,390	$	6,188

Schedule of Other-Than-Temporarily Impaired Investment Security Portion of Unrealized Loss Recognized in Other Comprehensive Income

The following table reflects activity during the years ended December 31, 2014, 2013, and 2012 related to credit losses on the other-than-temporarily impaired investment security where a portion of the unrealized loss was recognized in comprehensive income.

(Dollars in thousands)	2014			2013			2012
Balance at beginning of period	$	(1,273	)	$	(1,273	)	$	(1,273	)
Credit losses on securities not previously considered other-than-temporarily impaired		—			—			—
Credit losses on securities for which OTTI was previously recognized		—			—			—
Reduction for securities sold/settled during the period		1,273			—			—
Balance at end of period	$	—		$	(1,273	)	$	(1,273	)

Schedule of Amortized Cost and Estimated Fair Value of Investment Securities by Maturity

The amortized cost and estimated fair value of investment securities by maturity at December 31, 2014 are shown in the following table. Securities are classified according to their contractual maturities without consideration of principal amortization, potential prepayments or call options. Accordingly, actual maturities may differ from contractual maturities. Weighted average yields are calculated on the basis of the yield to maturity based on the amortized cost of each security.

	Securities Available for Sale							Securities Held to Maturity
(Dollars in thousands)	Weighted Average Yield			Amortized Cost		Estimated Fair Value		Weighted Average Yield			Amortized Cost		Estimated Fair Value
Within one year or less		1.54	%	$	14,643	$	14,764		2.65	%	$	10,000	$	10,088
One through five years		1.73			241,231		241,796		2.78			13,858		14,191
After five through ten years		2.15			425,233		429,973		3.10			20,945		21,729
Over ten years		2.20			1,466,169		1,472,320		2.86			72,157		73,473
		2.13	%	$	2,147,276	$	2,158,853		2.87	%	$	116,960	$	119,481

Schedule of Realized Gains and Losses from Sale of Securities Classified as Available for Sale

The following is a summary of realized gains and losses from the sale of securities classified as available for sale. Gains or losses on securities sold are recorded on the trade date, using the specific identification method.

	Years Ended December 31
(Dollars in thousands)	2014			2013			2012
Realized gains	$	863		$	2,387		$	3,754
Realized losses		(92	)		(110	)		(15	)
	$	771		$	2,277		$	3,739

Schedule of Securities in Other Assets on Company's Consolidated Balance Sheets

The Company included the following securities in “Other assets” on the consolidated balance sheets at December 31:

(Dollars in thousands)	2014		2013
Federal Home Loan Bank (FHLB) stock	$	38,476	$	24,369
Federal Reserve Bank (FRB) stock		34,348		28,098
Other investments		1,306		1,306
	$	74,130	$	53,773

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Share-Based Compensation - Unvested Restricted Stock Award Activity (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Balance at beginning of period	523,756	538,202	512,112
Granted	149,072	167,095	176,669
Forfeited	(167,550)	(28,713)	(13,164)
Earned and issued	(18,171)	(152,828)	(137,415)
Balance at end of period	487,107	523,756	538,202

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Goodwill and Other Acquired Intangible Assets - Schedule of Amortization Expense of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]
Aggregate amortization expense	$ 5,807	$ 4,720	$ 5,150
2015	5,646
2016	5,187
2017	3,586
2018	2,597
2019	1,877
2020 and thereafter	$ 1,468

XML

Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2014

Compensation Expense Included in Non-Interest Expense and Related Income Tax Benefits

The following table represents the compensation expense that is included in non-interest expense and related income tax benefits in the accompanying consolidated statements of comprehensive income related to stock options for the years ended December 31:

(Dollars in thousands, except per share data)	2014		2013		2012
Compensation expense related to stock options	$	2,053	$	2,110	$	1,873
Income tax benefit related to stock options		719		739		656
Impact on basic earnings per share		0.04		0.05		0.04
Impact on diluted earnings per share		0.04		0.05		0.04
Proceeds from the exercise of stock options	$	11,693	$	8,101	$	2,813
Excess tax benefits related to the exercise of stock options		2,105		886		1,221

Estimate Fair Value of Share Option Awards with Weighted-Average Assumptions

The Company uses the Black-Scholes option pricing model to estimate the fair value of stock option awards. The following weighted-average assumptions were used for option awards issued during the years ended December 31:

	2014			2013			2012
Expected dividends		2.1	%		2.6	%		2.7	%
Expected volatility		35.8	%		34.8	%		40.1	%
Risk-free interest rate		2.3	%		1.7	%		0.8	%
Expected term (in years)		7.5			8.6			5.00
Weighted-average grant-date fair value	$	21.26		$	15.37		$	14.50

Activity Related to Stock Options

The following table represents the activity related to stock options during the periods indicated.

	Number of shares			Weighted Average Exercise Price		Aggregate Intrinsic Value (Dollars in thousands)		Weighted Average Remaining Contract Life (in years)
Outstanding options, December 31, 2011		1,097,620		$	50.14
Granted		230,665			51.69
Issued in connection with acquisition		32,863			41.30
Exercised		(92,092	)		30.43	$	1,765
Forfeited or expired		(32,981	)		56.79
Outstanding options, December 31, 2012		1,236,075		$	51.48
Granted		75,722			52.36
Exercised		(200,748	)		40.35		2,740
Forfeited or expired		(38,220	)		55.87
Outstanding options, December 31, 2013		1,072,829		$	53.47
Granted		77,434			65.31
Exercised		(267,421	)		48.57		4,612
Forfeited or expired		(15,160	)		60.38
Outstanding options, December 31, 2014		867,682		$	55.92		8,220		5.1
Exercisable options, December 31, 2012		792,444			50.05
Exercisable options, December 31, 2013		707,934			53.54
Exercisable options, December 31, 2014		562,752			55.92	$	5,449		3.7

Schedule of Weighted Average Remaining Life of Options Outstanding within Stated Exercise Prices

The following table presents weighted average remaining life as of December 31, 2014 for options outstanding within the stated exercise prices:

	Options Outstanding						Options Exercisable
Exercise Price Range Per Share	Number of Options		Weighted Average Exercise Price		Weighted Average Remaining Life		Number of Options		Weighted Average Exercise Price
$34.33 to $51.69		182,416	$	49.24		4.3 Years		118,312	$	48.53
$51.70 to $52.35		111,197		52.33		7.1 Years		43,156		52.33
$52.36 to $54.68		146,995		53.43		6.5 Years		90,146		54.10
$54.69 to $57.60		142,360		56.52		3.7 Years		120,873		56.68
$57.61 to $59.83		105,666		58.38		1.5 Years		105,666		58.38
$59.84 to $111.71		179,048		65.06		6.7 Years		84,599		65.89
Total options		867,682	$	55.92		5.1 Years		562,752	$	55.92

Unvested Restricted Stock Award Activity

The following table represents unvested restricted stock award activity for the years ended December 31:

	2014			2013			2012
Balance at beginning of period		523,756			538,202			512,112
Granted		149,072			167,095			176,669
Forfeited		(167,550	)		(28,713	)		(13,164	)
Earned and issued		(18,171	)		(152,828	)		(137,415	)
Balance at end of period		487,107			523,756			538,202

Schedule of Share and Dividend Equivalent Share Award Activity

The following table represents phantom stock award activity during the periods indicated.

	Number of share equivalents			Dividend equivalents			Total share equivalents			Value of share equivalents (1)
Balance, December 31, 2011		232,921			8,942			241,863		$	11,924,000
Granted		119,038			9,152			128,190			6,297,000
Forfeited share equivalents		(10,949	)		(367	)		(11,316	)		556,000
Vested share equivalents		(22,281	)		(1,692	)		(23,973	)		1,180,000
Balance, December 31, 2012		318,729			16,035			334,764		$	16,444,000
Granted		169,662			11,189			180,851			11,366,000
Forfeited share equivalents		(18,975	)		(785	)		(19,760	)		1,242,000
Vested share equivalents		(52,178	)		(4,088	)		(56,266	)		2,922,000
Balance, December 31, 2013		417,238			22,351			439,589		$	27,628,000
Granted		118,859			9,566			128,425			8,328,000
Forfeited share equivalents		(19,736	)		(1,754	)		(21,490	)		1,394,000
Vested share equivalents		(75,331	)		(7,515	)		(82,846	)		5,512,000
Balance, December 31, 2014		441,030			22,648			463,678		$	30,070,000

⁽¹⁾  Except for share equivalents at the beginning of each period, which are based on the value at that time, and vested share payments, which are based on the cash paid at the time of vesting, the value of share equivalents is calculated based on the market price of the Company’s stock at the end of the respective periods. The market price of the Company’s stock was $64.85, $62.85 and $49.12 on December 31, 2014, 2013 and 2012, respectively.

Restricted Stock [Member]

Compensation Expense Included in Non-Interest Expense and Related Income Tax Benefits

The following table represents the compensation expense that was included in non-interest expense in the accompanying consolidated statements of comprehensive income related to restricted stock grants for the years ended December 31 of the periods indicated:

(Dollars in thousands)	2014		2013		2012
Compensation expense related to restricted stock	$	9,931	$	8,593	$	8,035

Phantom Stock Awards [Member]

Compensation Expense Included in Non-Interest Expense and Related Income Tax Benefits

The following table represents the compensation expense that was included in non-interest expense in the accompanying consolidated statements of comprehensive income related to restricted stock grants for the years ended December 31:

(Dollars in thousands)	2014		2013		2012
Compensation expense related to restricted stock	$	9,932	$	8,593	$	8,035

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Fair Value Measurements - Gains and Losses Included in Earnings Related to Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Other Comprehensive Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Change in unrealized gains (losses) relating to assets still held at December 31, 2014	$ 24,016
Noninterest Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total gains (losses) included in earnings	$ (7,348)

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Deposits (Tables)

12 Months Ended

Dec. 31, 2014

Banking and Thrift [Abstract]

Schedule of Deposits by Type

Deposits at December 31 are summarized as follows:

(Dollars in thousands)	2014		2013
Non-interest-bearing deposits	$	3,195,430	$	2,575,939
Negotiable order of withdrawal (NOW)		2,462,841		2,283,491
Money market deposits accounts (MMDA)		4,168,504		3,779,581
Savings deposits		577,513		387,397
Certificates of deposit and other time deposits		2,116,237		1,710,592
	$	12,520,525	$	10,737,000

Schedule of Time Deposits

Total time deposits summarized by denomination at December 31 are as follows:

(Dollars in thousands)	2014		2013
Time deposits less than $100,000	$	1,035,438	$	804,250
Time deposits greater than $100,000		1,080,799		906,342
	$	2,116,237	$	1,710,592

Schedule of Maturities of Certificates of Deposit

A schedule of maturities of all certificates of deposit as of December 31, 2014 is as follows:

(Dollars in thousands)
Years ending December 31
2015	$	1,297,125
2016		493,944
2017		171,884
2018		57,580
2019		49,967
2020 and thereafter		45,737
	$	2,116,237

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Deposits - Schedule of Deposits by Type (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Investments Schedule [Abstract]
Non-interest-bearing deposits	$ 3,195,430	$ 2,575,939
Negotiable order of withdrawal (NOW)	2,462,841	2,283,491
Money market deposits accounts (MMDA)	4,168,504	3,779,581
Savings deposits	577,513	387,397
Certificates of deposit and other time deposits	2,116,237	1,710,592
Total deposits	$ 12,520,525	$ 10,737,000	$ 10,748,277

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Acquisition and Disposition Activity - Schedule of Assets Acquired under Business Acquisitions (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Jan. 17, 2014	Dec. 31, 2013	Dec. 31, 2012	Feb. 24, 2014	May 01, 2014
Business Acquisition [Line Items]
Goodwill	$ 517,526	$ 8,600	$ 401,872	$ 401,872
Title Company LLC [Member]
Business Acquisition [Line Items]
Goodwill	221				200
Non-compete agreement	63
Title plant	14
Other intangible assets	75
Other assets	3
Total Assets	376
Louisiana Abstract and Title Llc [Member]
Business Acquisition [Line Items]
Goodwill	155					200
Non-compete agreement	100
Title plant	9
Other intangible assets	130
Other assets	6
Total Assets	$ 400

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Short-Term Borrowings - Summary of Short-Term Borrowings (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Debt Disclosure [Abstract]
Federal Home Loan Bank advances	$ 603,000	$ 375,000
Securities sold under agreements to repurchase	242,742	305,344
Total short-term borrowings	$ 845,742	$ 680,344	$ 303,045

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Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

Summary of Financial Instruments Outstanding

At December 31 the Company had the following financial instruments outstanding, whose contract amounts represent credit risk:

(Dollars in thousands)	2014		2013
Commitments to grant loans	$	161,350	$	221,627
Unfunded commitments under lines of credit		4,007,954		3,326,448
Commercial and standby letters of credit		134,882		105,026
Reserve for unfunded lending commitments		11,801		11,147

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Investment Securities - Schedule of Other-Than-Temporarily Impaired Investment Security Portion of Unrealized Loss Recognized in Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Investments, Debt and Equity Securities [Abstract]
Balance at beginning of period	$ (1,273)	$ (1,273)	$ (1,273)
Credit losses on securities not previously considered other-than-temporarily impaired	0	0	0
Credit losses on securities for which OTTI was previously recognized	0	0	0
Reduction for securities sold/settled during the period	1,273
Balance at end of period		$ (1,273)	$ (1,273)

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Fair Value of Financial Instruments - Estimated Fair Values and Carrying Amounts of Financial Instruments (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Financial Assets
Cash and cash equivalents	$ 548,095	$ 391,396	$ 970,977	$ 573,296
Loans and loans held for sale, net of unearned income	11,581,116	9,620,461	8,766,055
FDIC loss share receivable	69,627	162,312
Financial Liabilities
Deposits	12,520,525	10,737,000	10,748,277
Short-term borrowings	845,742	680,344	303,045
Long-term debt	403,254	280,699
Carrying Amount [Member]
Financial Assets
Cash and cash equivalents	548,095	391,396
Investment securities	2,275,813	2,090,906
Loans and loans held for sale, net of unearned income	11,581,116	9,620,461
FDIC loss share receivable	69,627	162,312
Derivative instruments	32,903	30,076
Accrued interest receivable	37,696	32,143
Financial Liabilities
Deposits	12,520,525	10,737,000
Short-term borrowings	845,742	680,344
Long-term debt	403,254	280,699
Derivative instruments	31,354	26,735
Accrued interest payable	8,258	6,102
Fair Value [Member]
Financial Assets
Cash and cash equivalents	548,095	391,396
Investment securities	2,278,334	2,089,363
Loans and loans held for sale, net of unearned income	11,605,446	9,724,432
FDIC loss share receivable	19,606	21,918
Derivative instruments	32,903	30,076
Accrued interest receivable	37,696	32,143
Financial Liabilities
Deposits	12,298,017	10,226,573
Short-term borrowings	845,742	680,344
Long-term debt	376,139	235,503
Derivative instruments	31,354	26,735
Accrued interest payable	$ 8,258	$ 6,102

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Transfers and Servicing of Financial Assets (Including Mortgage Banking Activity) - Schedule of Mortgage Servicing Rights at Carrying Values (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 57,665	$ 46,754
Accumulated Amortization	(37,304)	(31,415)
Net Carrying Amount	20,361	15,339
Mortgage Servicing Rights [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	4,751	2,146
Accumulated Amortization	(1,253)	(638)
Net Carrying Amount	$ 3,498	$ 1,508

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Other Real Estate Owned (Tables)

12 Months Ended

Dec. 31, 2014

Banking and Thrift [Abstract]

Schedule of Other Real Estate Owned Segregated Into Non-Covered and Covered Properties

Other real estate owned is included in Other assets on the Company’s consolidated balance sheets. Other real estate owned, segregated into non-covered and covered properties, consists of the following at December 31 for the periods indicated. For further discussion of loss share coverage periods applicable to the covered foreclosed assets, see Note 8 to these consolidated financial statements.

	2014						2013
(Dollars in thousands)	Non-covered		Covered (1)		Total		Non-covered		Covered		Total
Real estate owned acquired by foreclosure	$	18,614	$	22,872	$	41,486	$	28,072	$	60,474	$	88,546
Real estate acquired for development or resale		11,556		—		11,556		9,206		—		9,206
Other foreclosed property		81		824		905		93		1,328		1,421
Total	$	30,251	$	23,696	$	53,947	$	37,371	$	61,802	$	99,173

⁽¹⁾ Included in covered OREO at December 31, 2014 is $9.6 million of assets whose reimbursable loss periods ended as of January 1, 2015.

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Business Segments

12 Months Ended

Dec. 31, 2014

Segment Reporting [Abstract]

Business Segments

NOTE 26 – BUSINESS SEGMENTS

Each of the Company’s reportable operating segments is a business unit that serves the specific needs of the Company’s customers based on the products and services it offers. The reportable segments are based upon those revenue-producing components for which separate financial information is produced internally and are subject to evaluation by the chief operating decision maker in deciding how to allocate resources to segments. The Company reports the results of its operations through three business segments: IBERIABANK, IMC, and LTC.

The IBERIABANK segment represents the Company’s commercial and retail banking functions including its lending, investment, and deposit activities. IBERIABANK also includes the Company’s wealth management, capital markets, and other corporate functions that are not specifically related to a strategic business unit. The IMC segment represents the Company’s origination, funding and subsequent sale of one-to-four family residential mortgage loans. The LTC segment represents the Company’s title insurance and loan closing services. Certain expenses not directly attributable to a specific reportable segment are allocated to segments based on pre-determined means that reflect utilization.

Also within IBERIABANK are certain reconciling items in order to translate reportable segment results into consolidated results. The following tables present certain information regarding our operations by reportable segment, including a reconciliation of segment results to reported consolidated results for the periods presented. Reconciling items between segment results and reported results include:

• Elimination of interest income and interest expense representing interest earned by IBERIABANK on interest-bearing checking accounts held by related companies, as well as the elimination of the related deposit balances at the IBERIABANK segment;

• Elimination of investment in subsidiary balances on certain operating segments included in total and average segment assets; and

• Elimination of intercompany due to and due from balances on certain operating segments that are included in total and average segment assets.

IBERIABANK is considered a reportable segment based on the quantitative thresholds specified within ASC Topic 280, Segment Reporting (“ASC 280”). The Company’s wealth management, capital markets and trust operating segments are aggregated within the IBERIABANK reportable operating segment because they do not meet the thresholds specified by ASC 280 and based on the qualitative factors presented within ASC 280. The Company’s IMC and LTC segments do not meet the quantitative thresholds specified by ASC 280, but are reported because management believes information about those segments is useful to users of the financial statements.

(Dollars in thousands)	Year Ended December 31, 2014
	IBERIABANK			IMC			LTC			Consolidated
Interest income	$	498,820		$	5,992		$	3		$	504,815
Interest expense		42,983			1,721			—			44,704
Net interest income		455,837			4,271			3			460,111
Provision for loan losses		18,966			94			—			19,060
Mortgage income		71			51,726			—			51,797
Title income		—			—			20,492			20,492
Other non-interest income		101,401			(61	)		(1	)		101,339
Core deposit intangible amortization		5,569			—			—			5,569
Allocated expenses		(11,602	)		8,203			3,399			—
Other non-interest expenses		407,461			44,761			16,688			468,910
Income before income taxes		136,915			2,878			407			140,200
Income tax provision		33,419			1,148			183			34,750
Net income	$	103,496		$	1,730		$	224		$	105,450
Total loans and loans held for sale, net of unearned income	$	11,415,973		$	165,143		$	—		$	11,581,116
Total assets		15,538,432			194,156			26,017			15,758,605
Total deposits		12,515,329			5,196			—			12,520,525
Average assets		14,431,459			176,003			25,223			14,632,685
(Dollars in thousands)	Year Ended December 31, 2013
	IBERIABANK			IMC			LTC			Consolidated
Interest income	$	431,418		$	5,747		$	32		$	437,197
Interest expense		45,150			1,803			—			46,953
Net interest income		386,268			3,944			32			390,244
Provision for loan losses		5,123			22			—			5,145
Mortgage income		2			64,195			—			64,197
Title income		—			—			20,526			20,526
Other non-interest income		84,243			(10	)		2			84,235
Core deposit intangible amortization		4,499			—			—			4,499
Allocated expenses		(7,453	)		5,417			2,036			—
Other non-interest expenses		402,170			49,723			16,693			468,586
Income before income taxes		66,174			12,967			1,831			80,972
Income tax provision		10,035			5,093			741			15,869
Net income	$	56,139		$	7,874		$	1,090		$	65,103
Total loans and loans held for sale, net of unearned income	$	9,472,908		$	147,553		$	—		$	9,620,461
Total assets		13,167,162			173,131			25,257			13,365,550
Total deposits		10,734,030			2,970			—			10,737,000
Average assets		12,794,997			183,513			25,478			13,003,988

(Dollars in thousands)	Year Ended December 31, 2012
	IBERIABANK			IMC			LTC		Consolidated
Interest income	$	439,245		$	5,858		$	97	$	445,200
Interest expense		61,349			2,101			—		63,450
Net interest income		377,896			3,757			97		381,750
Provision for loan losses		20,550			121			—		20,671
Mortgage income		6			78,047			—		78,053
Title income		—			—			20,987		20,987
Other non-interest income		76,967			(10	)		—		76,957
Core deposit intangible amortization		4,900			—			—		4,900
Allocated expenses		(3,282	)		2,340			942		—
Other non-interest expenses		361,428			49,084			16,773		427,285
Income before income taxes		71,273			30,249			3,369		104,891
Income tax provision		15,192			11,871			1,433		28,496
Net income	$	56,081		$	18,378		$	1,936	$	76,395
Total loans and loans held for sale, net of unearned income	$	8,485,363		$	280,692		$	—	$	8,766,055
Total assets		12,796,811			308,152			24,715		13,129,678
Total deposits		10,745,528			2,749			—		10,748,277
Average assets		11,879,761			194,832			22,379		12,096,972

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Investment Securities - Schedule of Amortized Cost and Estimated Fair Value of Investment Securities by Maturity (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract]
Securities Available for Sale, Weighted Average Yield, Within one year or less	1.54%
Securities Available for Sale, Weighted Average Yield, One through five years	1.73%
Securities Available for Sale, Weighted Average Yield, After five through ten years	2.15%
Securities Available for Sale, Weighted Average Yield, Over ten years	2.20%
Securities Available for Sale, Weighted Average Yield, Total	2.13%
Securities Available for Sale, Amortized Cost, Within one year or less	$ 14,643
Securities Available for Sale, Amortized Cost, One through five years	241,231
Securities Available for Sale, Amortized Cost, After five through ten years	425,233
Securities Available for Sale, Amortized Cost, Over ten years	1,466,169
Securities Available for Sale, Amortized Cost, Total	2,147,276
Securities Available for Sale, Estimated Fair Value, Within one year or less	14,764
Securities Available for Sale, Estimated Fair Value, One through five years	241,796
Securities Available for Sale, Estimated Fair Value, After five through ten years	429,973
Securities Available for Sale, Estimated Fair Value, Over ten years	1,472,320
Securities Available for Sale, Estimated Fair Value, Totals	2,158,853	1,936,797
Securities Held to Maturity, Weighted Average Yield, Within one year or less	2.65%
Securities Held to Maturity, Weighted Average Yield, One through five years	2.78%
Securities Held to Maturity, Weighted Average Yield, After five through ten years	3.10%
Securities Held to Maturity, Weighted Average Yield, Over ten years	2.86%
Securities Held to Maturity, Weighted Average Yield, Totals	2.87%
Securities Held to Maturity, Amortized Cost, Within one year or less	10,000
Securities Held to Maturity, Amortized Cost, One through five years	13,858
Securities Held to Maturity, Amortized Cost, After five through ten years	20,945
Securities Held to Maturity, Amortized Cost, Over ten years	72,157
Securities Held to Maturity, Amortized Cost, Totals	116,960	154,109
Securities Held to Maturity, Estimated Fair Value, Within one year or less	10,088
Securities Held to Maturity, Estimated Fair Value, One through five years	14,191
Securities Held to Maturity, Estimated Fair Value, After five through ten years	21,729
Securities Held to Maturity, Estimated Fair Value, Over ten years	73,473
Securities held to maturity, Estimated Fair Value	$ 119,481	$ 152,566

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Derivative Instruments and Other Hedging Activities - Reconciliation of Gross Amounts in Consolidated Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative assets subject to master netting arrangements, Gross Amounts	$ 28,798	$ 26,422
Derivative liabilities subject to master netting arrangements, Gross Amounts	15,411	10,620
Derivative assets subject to master netting arrangements, Gross Amounts Not Offset	28,798	26,422
Derivative liabilities subject to master netting arrangements, Gross Amounts Not Offset	11,676	5,201
Collateral [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liabilities subject to master netting arrangements, Gross Amounts Not Offset	(3,735)	(5,419)
Interest Rate Contracts [Member] | Not Designated as Hedging Instruments [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative assets subject to master netting arrangements, Gross Amounts	15,411	10,621
Derivative liabilities subject to master netting arrangements, Gross Amounts	15,411	10,620
Derivative assets subject to master netting arrangements, Gross Amounts Not Offset	15,411	10,621
Derivative liabilities subject to master netting arrangements, Gross Amounts Not Offset	11,676	5,201
Interest Rate Contracts [Member] | Collateral [Member] | Not Designated as Hedging Instruments [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liabilities subject to master netting arrangements, Gross Amounts Not Offset	(3,735)	(5,419)
Written and Purchased Options [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative assets subject to master netting arrangements, Gross Amounts	13,387	15,801
Derivative assets subject to master netting arrangements, Gross Amounts Not Offset	$ 13,387	$ 15,801

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Long-Term Debt - Schedule of Long-Term Debt (Parenthetical) (Detail)	0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
3-month LIBOR rate	0.26%	0.25%
Statutory Trust I, 3 Month LIBOR Plus 3.25% [Member]
Debt Instrument [Line Items]
LIBOR plus rate	3.25%
Statutory Trust II, 3 Month LIBOR Plus 3.15% [Member]
Debt Instrument [Line Items]
LIBOR plus rate	3.15%
Statutory Trust III, 3 Month LIBOR Plus 2.00% [Member]
Debt Instrument [Line Items]
LIBOR plus rate	2.00%
Statutory Trust IV, 3 Month LIBOR Plus 1.60% [Member]
Debt Instrument [Line Items]
LIBOR plus rate	1.60%
American Horizons Statutory Trust I, 3 Month LIBOR Plus 3.15% [Member]
Debt Instrument [Line Items]
LIBOR plus rate	3.15%
Statutory Trust V, 3 Month LIBOR Plus 1.435% [Member]
Debt Instrument [Line Items]
LIBOR plus rate	1.435%
Statutory Trust VI, 3 Month LIBOR Plus 2.75% [Member]
Debt Instrument [Line Items]
LIBOR plus rate	2.75%
Statutory Trust VII, 3 Month LIBOR Plus 2.54% [Member]
Debt Instrument [Line Items]
LIBOR plus rate	2.54%
Statutory Trust VIII, 3 Month LIBOR Plus 3.50% [Member]
Debt Instrument [Line Items]
LIBOR plus rate	3.50%
OMNI Trust I, 3 Month LIBOR Plus 3.30% [Member]
Debt Instrument [Line Items]
LIBOR plus rate	3.30%
OMNI Trust II, 3 Month LIBOR Plus 2.79% [Member]
Debt Instrument [Line Items]
LIBOR plus rate	2.79%
0.724% to 7.04% [Member]
Debt Instrument [Line Items]
Long-term debt, fixed interest, percentage rate minimum	0.724%
Long-term debt, fixed interest, percentage rate maximum	7.04%
0.50% to 5.00% Fixed [Member]
Debt Instrument [Line Items]
Long-term debt, fixed interest, percentage rate minimum	0.50%
Long-term debt, fixed interest, percentage rate maximum	5.00%
Minimum [Member] | 0.50% to 5.00% Fixed [Member]
Debt Instrument [Line Items]
Debt instrument maturity date period, (in years)	P7Y
Maximum [Member] | 0.50% to 5.00% Fixed [Member]
Debt Instrument [Line Items]
Debt instrument maturity date period, (in years)	P40Y

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Income Taxes - Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Deferred tax asset:
NOL carryforward	$ 978	$ 1,001
Allowance for credit losses	59,267	85,101
Deferred compensation	6,631	6,315
Basis difference in acquired assets	53,202	70,136
Unrealized loss on available for sale investments		8,880
OREO	9,845	31,943
Other	13,530	19,509
Subtotal	143,453	222,885
Deferred tax liability:
Basis difference in acquired assets	(53,940)	(130,426)
Gain on acquisition	(2,426)	(17,693)
FHLB stock	(85)	(36)
Premises and equipment	(9,652)	(10,209)
Acquisition intangibles	(12,151)	(12,113)
Deferred loan costs	(3,771)	(2,915)
Unrealized gain on available for sale investments	(4,052)
Investments acquired	(570)	(235)
Swap gain	(75)	(75)
Other	(12,908)	(11,089)
Subtotal	(99,630)	(184,791)
Net deferred tax asset	$ 43,823	$ 38,094

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Investment Securities - Schedule of Amortized Cost and Fair Values of Investment Securities, with Gross Unrealized Gains and Losses (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Schedule of Securities Available-for-sale And Held To Maturity [Line Items]
Securities available for sale, Amortized Cost	$ 2,147,276	$ 1,963,046
Securities available for sale, Gross Unrealized Gains	22,296	13,867
Securities available for sale, Gross Unrealized Losses	(10,719)	(40,116)
Securities available for sale, Estimated Fair Value	2,158,853	1,936,797
Securities held to maturity, Amortized Cost	116,960	154,109
Securities held to maturity, Gross Unrealized Gains	3,392	2,205
Securities held to maturity, Gross Unrealized Losses	(871)	(3,748)
Securities held to maturity, Estimated Fair Value	119,481	152,566
U.S. Government-Sponsored Enterprise Obligations [Member]
Schedule of Securities Available-for-sale And Held To Maturity [Line Items]
Securities available for sale, Amortized Cost	317,386	406,092
Securities available for sale, Gross Unrealized Gains	1,700	1,382
Securities available for sale, Gross Unrealized Losses	(3,533)	(11,913)
Securities available for sale, Estimated Fair Value	315,553	395,561
Securities held to maturity, Amortized Cost	10,000	34,478
Securities held to maturity, Gross Unrealized Gains	88	484
Securities held to maturity, Estimated Fair Value	10,088	34,962
Obligations of State and Political Obligations [Member]
Schedule of Securities Available-for-sale And Held To Maturity [Line Items]
Securities available for sale, Amortized Cost	86,513	105,300
Securities available for sale, Gross Unrealized Gains	3,679	2,435
Securities available for sale, Gross Unrealized Losses	(2)	(256)
Securities available for sale, Estimated Fair Value	90,190	107,479
Securities held to maturity, Amortized Cost	77,597	84,290
Securities held to maturity, Gross Unrealized Gains	3,153	1,463
Securities held to maturity, Gross Unrealized Losses	(145)	(1,624)
Securities held to maturity, Estimated Fair Value	80,605	84,129
Mortgage-Backed Securities [Member]
Schedule of Securities Available-for-sale And Held To Maturity [Line Items]
Securities available for sale, Amortized Cost	1,741,917	1,450,194
Securities available for sale, Gross Unrealized Gains	16,882	10,031
Securities available for sale, Gross Unrealized Losses	(7,184)	(27,947)
Securities available for sale, Estimated Fair Value	1,751,615	1,432,278
Securities held to maturity, Amortized Cost	29,363	35,341
Securities held to maturity, Gross Unrealized Gains	151	258
Securities held to maturity, Gross Unrealized Losses	(726)	(2,124)
Securities held to maturity, Estimated Fair Value	28,788	33,475
Other Securities [Member]
Schedule of Securities Available-for-sale And Held To Maturity [Line Items]
Securities available for sale, Amortized Cost	1,460	1,460
Securities available for sale, Gross Unrealized Gains	35	19
Securities available for sale, Estimated Fair Value	$ 1,495	$ 1,479

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Loans - Schedule of Carrying Amount of Loans Acquired (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractually required principal and interest at acquisition	$ 87,001
Nonaccretable difference (expected losses and foregone interest)	(6,478)
Cash flows expected to be collected at acquisition	80,523
Accretable yield	(13,848)
Basis in acquired loans at acquisition	66,675
Acquired Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractually required principal and interest at acquisition	71,871
Nonaccretable difference (expected losses and foregone interest)	(6,117)
Cash flows expected to be collected at acquisition	65,754
Accretable yield	(12,312)
Basis in acquired loans at acquisition	53,442
Acquired Performing Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractually required principal and interest at acquisition	15,130
Nonaccretable difference (expected losses and foregone interest)	(361)
Cash flows expected to be collected at acquisition	14,769
Accretable yield	(1,536)
Basis in acquired loans at acquisition	$ 13,233

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Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2014

Fair Value Disclosures [Abstract]

Estimated Fair Values and Carrying Amounts of Financial Instruments

The estimated fair values and carrying amounts of the Company’s financial instruments are as follows:

	December 31, 2014				December 31, 2013
(Dollars in thousands)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Financial Assets
Cash and cash equivalents	$	548,095	$	548,095	$	391,396	$	391,396
Investment securities		2,275,813		2,278,334		2,090,906		2,089,363
Loans and loans held for sale, net of unearned income		11,581,116		11,605,446		9,620,461		9,724,432
FDIC loss share receivable		69,627		19,606		162,312		21,918
Derivative instruments		32,903		32,903		30,076		30,076
Accrued interest receivable		37,696		37,696		32,143		32,143
Financial Liabilities
Deposits	$	12,520,525	$	12,298,017	$	10,737,000	$	10,226,573
Short-term borrowings		845,742		845,742		680,344		680,344
Long-term debt		403,254		376,139		280,699		235,503
Derivative instruments		31,354		31,354		26,735		26,735
Accrued interest payable		8,258		8,258		6,102		6,102

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Goodwill and Other Acquired Intangible Assets - Schedule of Carrying Amount of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Jan. 17, 2014	Dec. 31, 2012
Goodwill And Other Intangibles [Line Items]
Balance, December 31, 2012	$ 401,872	$ 8,600	$ 401,872
Goodwill acquired during the year	115,654
Balance, December 31, 2013	517,526	8,600	401,872
IBERIABANK [Member]
Goodwill And Other Intangibles [Line Items]
Balance, December 31, 2012	373,905		373,905
Goodwill acquired during the year	115,278
Balance, December 31, 2013	489,183		373,905
IMC [Member]
Goodwill And Other Intangibles [Line Items]
Balance, December 31, 2012	23,178		23,178
Goodwill acquired during the year
Balance, December 31, 2013	23,178		23,178
LTC [Member]
Goodwill And Other Intangibles [Line Items]
Balance, December 31, 2012	4,789		4,789
Goodwill acquired during the year	376
Balance, December 31, 2013	$ 5,165		$ 4,789

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Shareholders' Equity and Other Comprehensive Income (Loss) - Summary of Tax Effects of Each Component of Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Equity [Abstract]
Unrealized holding gains/losses arising during the period, Before-Tax Amount	$ 37,719	$ (62,095)	$ 2,174
Reclassification adjustment for losses/gains included in net income, Before-Tax Amount	(771)	(2,277)	(3,739)
Net unrealized losses/gains, Before-Tax Amount	36,948	(64,372)	(1,565)
Change in fair value of derivative instruments designated as cash flow hedges during the period, Before-Tax Amount		953	(22)
Reclassification adjustment for losses included in net income, Before-Tax Amount		391	1,618
Fair value of derivative instruments designated as cash flow hedges, Before-Tax Amount		1,344	1,596
Total other comprehensive income/loss, Before-Tax Amount	36,948	(63,028)	31
Unrealized holding gains/losses arising during the period, Tax Expense (Benefit)	(13,202)	21,733	(761)
Reclassification adjustment for losses/gain included in net income, Tax Expense (Benefit)	270	797	1,308
Net unrealized gains/losses, Tax Expense (Benefit)	(12,932)	22,530	547
Change in fair value of derivative instruments designated as cash flow hedges during the period, Tax Expense (Benefit)		(333)	8
Reclassification adjustment for losses included in net income, Tax Expense (Benefit)		(137)	(566)
Fair value of derivative instruments designated as cash flow hedges, Tax Expense (Benefit)		(470)	(558)
Total other comprehensive income/loss, Tax Expense (Benefit)	(12,932)	22,060	(11)
Unrealized holding gains/losses arising during the period, Net-of-Tax Amount	24,517	(40,362)	1,413
Reclassification adjustment for gains/losses included in net income, Net-of-Tax Amount	(501)	(1,480)	(2,431)
Net unrealized gains/losses, Net-of-Tax Amount	24,016	(41,842)	(1,018)
Change in fair value of derivative instruments designated as cash flow hedges during the period, Net-of-Tax Amount		620	(14)
Reclassification adjustment for losses included in net income, Net-of-Tax Amount		254	1,052
Fair value of derivative instruments designated as cash flow hedges, Net-of-Tax Amount		874	1,038
Other comprehensive income (loss), net of tax	$ 24,016	$ (40,968)	$ 20

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Investment Securities - Schedule of Securities with Gross Unrealized Losses Aggregated by Investment Category (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Net Investment Income [Line Items]
Securities available for sale, Less Than Twelve Months, Gross Unrealized Losses	$ (1,191)	$ (35,543)
Securities available for sale, Less Than Twelve Months, Estimated Fair Value	304,871	1,165,829
Securities available for sale, Over Twelve Months, Gross Unrealized Losses	(9,528)	(4,573)
Securities available for sale, Over Twelve Months, Estimated Fair Value	535,047	88,432
Securities available for sale, Gross Unrealized Losses, Total	(10,719)	(40,116)
Securities available for sale, Estimated Fair Value, Total	839,918	1,254,261
Securities held to maturity, Less Than Twelve Months, Gross Unrealized Losses	(9)	(2,133)
Securities held to maturity, Less Than Twelve Months, Estimated Fair Value	2,287	42,268
Securities held to maturity, Over Twelve Months, Gross Unrealized Losses	(862)	(1,615)
Securities held to maturity, Over Twelve Months, Estimated Fair Value	29,402	17,856
Securities held to maturity, Gross Unrealized Losses, Total	(871)	(3,748)
Securities held to maturity, Estimated Fair Value, Total	31,689	60,124
Obligations of State and Political Obligations [Member]
Net Investment Income [Line Items]
Securities available for sale, Less Than Twelve Months, Gross Unrealized Losses	(2)	(30)
Securities available for sale, Less Than Twelve Months, Estimated Fair Value	185	2,415
Securities available for sale, Over Twelve Months, Gross Unrealized Losses		(226)
Securities available for sale, Over Twelve Months, Estimated Fair Value		1,047
Securities available for sale, Gross Unrealized Losses, Total	(2)	(256)
Securities available for sale, Estimated Fair Value, Total	185	3,462
Securities held to maturity, Less Than Twelve Months, Gross Unrealized Losses	(9)	(1,181)
Securities held to maturity, Less Than Twelve Months, Estimated Fair Value	2,287	29,355
Securities held to maturity, Over Twelve Months, Gross Unrealized Losses	(136)	(443)
Securities held to maturity, Over Twelve Months, Estimated Fair Value	8,590	6,240
Securities held to maturity, Gross Unrealized Losses, Total	(145)	(1,624)
Securities held to maturity, Estimated Fair Value, Total	10,877	35,595
Mortgage-Backed Securities [Member]
Net Investment Income [Line Items]
Securities available for sale, Less Than Twelve Months, Gross Unrealized Losses	(1,189)	(23,749)
Securities available for sale, Less Than Twelve Months, Estimated Fair Value	304,686	864,899
Securities available for sale, Over Twelve Months, Gross Unrealized Losses	(5,995)	(4,198)
Securities available for sale, Over Twelve Months, Estimated Fair Value	294,549	81,870
Securities available for sale, Gross Unrealized Losses, Total	(7,184)	(27,947)
Securities available for sale, Estimated Fair Value, Total	599,235	946,769
Securities held to maturity, Less Than Twelve Months, Gross Unrealized Losses		(952)
Securities held to maturity, Less Than Twelve Months, Estimated Fair Value		12,913
Securities held to maturity, Over Twelve Months, Gross Unrealized Losses	(726)	(1,172)
Securities held to maturity, Over Twelve Months, Estimated Fair Value	20,812	11,616
Securities held to maturity, Gross Unrealized Losses, Total	(726)	(2,124)
Securities held to maturity, Estimated Fair Value, Total	20,812	24,529
U.S. Government-Sponsored Enterprise Obligations [Member]
Net Investment Income [Line Items]
Securities available for sale, Less Than Twelve Months, Gross Unrealized Losses		(11,764)
Securities available for sale, Less Than Twelve Months, Estimated Fair Value		298,515
Securities available for sale, Over Twelve Months, Gross Unrealized Losses	(3,533)	(149)
Securities available for sale, Over Twelve Months, Estimated Fair Value	240,498	5,515
Securities available for sale, Gross Unrealized Losses, Total	(3,533)	(11,913)
Securities available for sale, Estimated Fair Value, Total	$ 240,498	$ 304,030

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Related Party Transactions - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule of Other Related Party Transactions [Line Items]
Deposits from related parties	$ 3,000,000	$ 5,900,000
Executive Officers And Directors And Their Affiliates [Member]
Schedule of Other Related Party Transactions [Line Items]
Loans and leases receivable, related parties	100,000	100,000
Total principal additions on loan	60,000	41,000	252,000
Total principal payments on loan	100,000	700,000	900,000
Related party, unfunded commitments	$ 30,000	$ 37,000

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Loans - Schedule of Aging of Non-Covered Loans (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2014
Receivables [Abstract]
Past due loans threshold period	90 days

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Share-Based Compensation - Schedule of Share and Dividend Equivalent Share Award Activity (Parenthetical) (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Market price of Company's stock	$ 64.85	$ 62.85	$ 49.12

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Fair Value Measurements - Summary of Difference Between the Aggregate Fair Value and the Aggregate Unpaid Principal Balance for Mortgage Loans Held for Sale (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Fair Value Disclosures [Abstract]
Mortgage loans held for sale, at fair value, Aggregate Fair Value	$ 139,950	$ 97,273
Mortgage loans held for sale, at fair value, Aggregate Unpaid Principal	134,639	96,875
Mortgage loans held for sale, at fair value, Aggregate Fair Value Less Unpaid Principal	$ 5,311	$ 398

XML

Investment Securities - Schedule of Securities in Other Assets on Company's Consolidated Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract]
Federal Home Loan Bank (FHLB) stock	$ 38,476	$ 24,369
Federal Reserve Bank (FRB) stock	34,348	28,098
Other investments	1,306	1,306
Total	$ 74,130	$ 53,773

XML

Loans - Schedule of Legacy Loans on Nonaccrual Status (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	$ 34,970	$ 43,687
Commercial Loans [Member] | Commercial Real Estate Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	69	1,803
Commercial Loans [Member] | Commercial Real Estate - Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	6,883	7,648
Commercial Loans [Member] | Business [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	3,028	15,020
Residential Mortgage Loans [Member] | Residential Prime [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	10,767	8,611
Residential Mortgage Loans [Member] | Residential Subprime [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	3,595	1,626
Consumer and Other Loans [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	7,404	6,808
Consumer and Other Loans [Member] | Indirect Automobile [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	1,419	1,275
Consumer and Other Loans [Member] | Credit Card [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	1,032	411
Consumer and Other Loans [Member] | Consumer - Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	$ 773	$ 485

XML

Investment Securities - Additional Information on Securities in a Continuous Loss Position (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 Securities	Dec. 31, 2013 Securities
Schedule of Available-for-sale Securities [Line Items]
Number of securities, available for sale securities	71	25
Number of securities, amortized costs	$ 574,840	$ 112,476
Number of securities, unrealized loss	10,390	6,188
Fannie Mae, Freddie Mac, or Ginnie Mae [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of securities, available for sale securities	66	20
Number of securities, amortized costs	566,113	104,520
Number of securities, unrealized loss	10,254	5,519
Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of securities, available for sale securities	5	5
Number of securities, amortized costs	8,727	7,956
Number of securities, unrealized loss	$ 136	$ 669

XML

Acquisition and Disposition Activity - Supplemental Pro Forma Information (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Business Acquisition, Pro Forma Information [Abstract]
Interest and non-interest income	$ 669,607	$ 687,279
Net income	$ 74,624	$ 86,473
Earnings per share - basic	$ 2.26	$ 2.63
Earnings per share - diluted	$ 2.26	$ 2.63

XML

Shareholders' Equity and Other Comprehensive Income (Loss)

12 Months Ended

Dec. 31, 2014

Equity [Abstract]

Shareholders' Equity and Other Comprehensive Income (Loss)

NOTE 18 – SHAREHOLDERS’ EQUITY AND OTHER COMPREHENSIVE INCOME (LOSS)

Other Comprehensive Income

The following is a summary of the tax effects of each component of other comprehensive income for the years ended December 31:

	2014
(Dollars in thousands)	Before Tax			Tax Expense			Net-of-Tax Amount
Unrealized gain on securities:
Unrealized holding gains arising during the period	$	37,719		$	(13,202	)	$	24,517
Reclassification adjustment for gains included in net income		(771	)		270			(501	)
Net unrealized gains		36,948			(12,932	)		24,016
Fair value of derivative instruments designated as cash flow hedges
Change in fair value of derivative instruments designated as cash flow hedges during the period	$	—		$	—		$	—
Reclassification adjustment for losses included in net income		—			—			—
Fair value of derivative instruments designated as cash flow hedges		—			—			—
Total other comprehensive income	$	36,948		$	(12,932	)	$	24,016
	2013
(Dollars in thousands)	Before Tax			Tax  Benefit			Net-of-Tax Amount
Unrealized loss on securities:
Unrealized holding losses arising during the period	$	(62,095	)	$	21,733		$	(40,362	)
Reclassification adjustment for gains included in net income		(2,277	)		797			(1,480	)
Net unrealized losses		(64,372	)		22,530			(41,842	)
Fair value of derivative instruments designated as cash flow hedges
Change in fair value of derivative instruments designated as cash flow hedges during the period	$	953		$	(333	)	$	620
Reclassification adjustment for losses included in net income		391			(137	)		254
Fair value of derivative instruments designated as cash flow hedges		1,344			(470	)		874
Total other comprehensive loss	$	(63,028	)	$	22,060		$	(40,968	)
	2012
(Dollars in thousands)	Before Tax			Tax Expense			Net-of-Tax Amount
Unrealized loss on securities:
Unrealized holding gains arising during the period	$	2,174		$	(761	)	$	1,413
Reclassification adjustment for gains included in net income		(3,739	)		1,308			(2,431	)
Net unrealized losses		(1,565	)		547			(1,018	)
Fair value of derivative instruments designated as cash flow hedges
Change in fair value of derivative instruments designated as cash flow hedges during the period	$	(22	)	$	8		$	(14	)
Reclassification adjustment for losses included in net income		1,618			(566	)		1,052
Fair value of derivative instruments designated as cash flow hedges		1,596			(558	)		1,038
Total other comprehensive income	$	31		$	(11	)	$	20

XML

Share-Based Compensation - Compensation Expense Included in Non-Interest Expense Related to Restricted Stock Grants (Detail) (Restricted Stock [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense related to restricted stock	$ 9,932	$ 8,593	$ 8,035

XML

Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2014

Debt Disclosure [Abstract]

Schedule of Long-Term Debt

Long-term debt at December 31 is summarized as follows:

(Dollars in thousands)
	2014		2013
IBERIABANK:
Federal Home Loan Bank notes, 0.724% to 7.040%	$	210,549	$	92,267
Notes payable - Investment fund contribution, 7 to 40 year term, 0.50% to 5.00% fixed		80,843		76,570
		291,392		168,837
IBERIABANK Corporation (junior subordinated debt):
Statutory Trust I, 3 month LIBOR (1), plus 3.25%		10,310		10,310
Statutory Trust II, 3 month LIBOR (1), plus 3.15%		10,310		10,310
Statutory Trust III, 3 month LIBOR (1), plus 2.00%		10,310		10,310
Statutory Trust IV, 3 month LIBOR (1), plus 1.60%		15,464		15,464
American Horizons Statutory Trust I, 3 month LIBOR (1), plus 3.15%		6,186		6,186
Statutory Trust V, 3 month LIBOR (1), plus 1.435%		10,310		10,310
Statutory Trust VI, 3 month LIBOR (1), plus 2.75%		12,372		12,372
Statutory Trust VII, 3 month LIBOR (1), plus 2.54%		13,403		13,403
Statutory Trust VIII, 3 month LIBOR (1), plus 3.50%		7,217		7,217
OMNI Trust I, 3 month LIBOR (1), plus 3.30%		8,248		8,248
OMNI Trust II, 3 month LIBOR (1), plus 2.79%		7,732		7,732
		111,862		111,862
	$	403,254	$	280,699

⁽¹⁾ The interest rate on the Company’s long-term debt indexed to LIBOR is based on the 3-month LIBOR rate. The 3-month LIBOR rate was 0.26% and 0.25% at December 31, 2014 and 2013, respectively.

Maturities of Long-Term Debt and Advances

Advances and long-term debt at December 31, 2014 have maturities or call dates in future years as follows:

(Dollars in thousands)
2015	$	6,941
2016		41,916
2017		101,321
2018		20,741
2019		8,696
2020 and thereafter		223,639
	$	403,254

XML

Restrictions on Dividends, Loans and Advances - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014
Disclosure Restrictions On Dividends Loans And Advances Narrative [Abstract]
Dividends payable by parent	$ 108.4
Funds available for loans or advances	$ 140.8

XML

Loss Sharing Agreements and FDIC Loss Share Receivable (Tables)

12 Months Ended

Dec. 31, 2014

Text Block [Abstract]

Schedule of FDIC Loss Share Receivables

The following is a summary of FDIC loss share receivables year-to-date activity:

	December 31
(Dollars in thousands)	2014			2013
Balance at beginning of period	$	162,312		$	423,069
Change due to (reversal of) loan loss provision recorded on FDIC covered loans		(4,260	)		(56,085	)
Amortization		(74,617	)		(97,849	)
Recoveries payable (submission of reimbursable losses) to the FDIC		3,282			(52,586	)
Impairment		(5,121	)		(31,813	)
Changes due to a change in cash flow assumptions on OREO and other changes		(11,969	)		(22,424	)
Balance at end of period	$	69,627		$	162,312

XML

Investment Securities - Additional Information (Detail) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014 Security	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013 Security	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014 Security	Dec. 31, 2013 Security	Dec. 31, 2012 Bonds
Net Investment Income [Line Items]
Pledged securities, carrying values	$ 1,400,000,000				$ 1,500,000,000				$ 1,400,000,000	$ 1,500,000,000
Number of debt securities, held	112				207				112	207
Unrealized losses on debt securities, percent of amortized cost	1.31%				3.23%				1.31%	3.23%
Unrated revenue municipal bond											1
Impairment of par value bond, percentage									50.00%
Gain (loss) on sale of available for sale investments	$ 164,000	$ 582,000	$ 8,000	$ 19,000	$ 19,000	$ 13,000	$ (57,000)	$ 2,359,000	$ 771,000	$ 2,277,000	$ 3,739,000
Obligations of State and Political Obligations [Member]
Net Investment Income [Line Items]
Number of securities, continuous loss position, over twelve months	0								0

XML

Allowance for Credit Losses and Credit Quality - Investment in Covered Loans and Non-Covered Loans by Credit Quality Indicator (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	$ 10,996,500	$ 8,772,226
Balance at end of period	444,544	719,793
Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	729,570	87,114
30+ Days Past Due	25,225	6,676
Discount	(18,507)	(7,991)
Total	736,288	85,799
Residential Prime [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	418,552	18,796
30+ Days Past Due	11,858	226
Discount	(5,831)	(887)
Total	424,579	18,135
Home Equity [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	216,310	53,995
30+ Days Past Due	9,808	5,071
Discount	(8,419)	(5,623)
Total	217,699	53,443
Indirect Automobile [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	393	1,725
30+ Days Past Due	39	128
Discount	(40)
Total	392	1,853
Consumer - Other [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	94,315	12,598
30+ Days Past Due	3,520	1,251
Discount	(4,217)	(1,481)
Total	93,618	12,368
Pass [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	561,512	425,189
Pass [Member] | Commercial Real Estate Construction [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	24,118	21,244
Pass [Member] | Commercial Real Estate - Other [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	445,557	350,412
Pass [Member] | Commercial Business [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	91,837	53,533
Special Mention [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	16,661	5,613
Special Mention [Member] | Commercial Real Estate Construction [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	2,006
Special Mention [Member] | Commercial Real Estate - Other [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	12,794	5,096
Special Mention [Member] | Commercial Business [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	1,861	517
Substandard [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	58,581	24,833
Substandard [Member] | Commercial Real Estate Construction [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	4,624	1,519
Substandard [Member] | Commercial Real Estate - Other [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	49,139	21,413
Substandard [Member] | Commercial Business [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	4,818	1,901
Doubtful [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	257	93
Doubtful [Member] | Commercial Real Estate - Other [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification		93
Doubtful [Member] | Commercial Business [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	257
Internally Assigned Grade Loss [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Discount	(45,513)	(57,622)
Total	591,498	398,106
Internally Assigned Grade Loss [Member] | Commercial Real Estate Construction [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Discount	(1,170)	(2,532)
Total	29,578	20,231
Internally Assigned Grade Loss [Member] | Commercial Real Estate - Other [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Discount	(39,119)	(52,176)
Total	468,371	324,838
Internally Assigned Grade Loss [Member] | Commercial Business [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Discount	(5,224)	(2,914)
Total	93,549	53,037
Non-Covered Legacy Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	2,627,308	2,219,954
30+ Days Past Due	39,208	27,412
Total	2,666,516	2,247,366
Credit risk by payment status, Current	9,603,423	8,222,168
Total	9,668,714	8,288,321
Non-Covered Legacy Loans [Member] | Residential Prime [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	392,900	286,167
30+ Days Past Due	15,310	11,640
Total	408,210	297,807
Non-Covered Legacy Loans [Member] | Residential Subprime [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	115,889	114,939
30+ Days Past Due	3,595	1,626
Total	119,484	116,565
Non-Covered Legacy Loans [Member] | Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	1,278,865	1,091,894
30+ Days Past Due	12,111	9,333
Total	1,290,976	1,101,227
Non-Covered Legacy Loans [Member] | Indirect Automobile [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	392,504	370,388
30+ Days Past Due	4,262	2,995
Total	396,766	373,383
Non-Covered Legacy Loans [Member] | Credit Card [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	71,297	62,873
30+ Days Past Due	1,448	769
Total	72,745	63,642
Non-Covered Legacy Loans [Member] | Consumer - Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	375,853	293,693
30+ Days Past Due	2,482	1,049
Total	378,335	294,742
Non-Covered Legacy Loans [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	6,891,435	5,931,779
Non-Covered Legacy Loans [Member] | Pass [Member] | Commercial Real Estate Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	483,930	370,824
Non-Covered Legacy Loans [Member] | Pass [Member] | Commercial Real Estate - Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	3,161,593	2,694,161
Non-Covered Legacy Loans [Member] | Pass [Member] | Commercial Business [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	3,245,912	2,866,794
Non-Covered Legacy Loans [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	57,417	42,700
Non-Covered Legacy Loans [Member] | Special Mention [Member] | Commercial Real Estate Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	240	9,309
Non-Covered Legacy Loans [Member] | Special Mention [Member] | Commercial Real Estate - Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	49,847	27,227
Non-Covered Legacy Loans [Member] | Special Mention [Member] | Commercial Business [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	7,330	6,164
Non-Covered Legacy Loans [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	51,251	65,437
Non-Covered Legacy Loans [Member] | Substandard [Member] | Commercial Real Estate Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	69	2,962
Non-Covered Legacy Loans [Member] | Substandard [Member] | Commercial Real Estate - Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	22,217	30,308
Non-Covered Legacy Loans [Member] | Substandard [Member] | Commercial Business [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	28,965	32,167
Non-Covered Legacy Loans [Member] | Doubtful [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	2,095	1,039
Non-Covered Legacy Loans [Member] | Doubtful [Member] | Commercial Real Estate - Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	162	113
Non-Covered Legacy Loans [Member] | Doubtful [Member] | Commercial Business [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	1,933	926
Non-Covered Legacy Loans [Member] | Internally Assigned Grade Loss [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	7,002,198	6,040,955
Non-Covered Legacy Loans [Member] | Internally Assigned Grade Loss [Member] | Commercial Real Estate Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	484,239	383,095
Non-Covered Legacy Loans [Member] | Internally Assigned Grade Loss [Member] | Commercial Real Estate - Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	3,233,819	2,751,809
Non-Covered Legacy Loans [Member] | Internally Assigned Grade Loss [Member] | Commercial Business [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	3,284,140	2,906,051
Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at end of period	444,544	719,793	1,092,756
Covered Loans [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	241,057	303,185
30+ Days Past Due	38,652	66,800
Discount	(55,551)	(74,549)
Covered Loans [Member] | Commercial Business [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at end of period	31,260	37,025	87,051
Covered Loans [Member] | Residential Prime [Member] | Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	140,628	158,710
30+ Days Past Due	22,058	30,814
Discount	(34,662)	(35,499)
Covered Loans [Member] | Home Equity [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	99,478	143,236
30+ Days Past Due	16,542	35,811
Discount	(23,590)	(41,925)
Covered Loans [Member] | Credit Card [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	614	648
30+ Days Past Due	34	31
Covered Loans [Member] | Consumer - Other [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	337	591
30+ Days Past Due	18	144
Discount	2,701	2,875
Covered Loans [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	145,620	222,175
Covered Loans [Member] | Pass [Member] | Commercial Real Estate Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	34,731	42,886
Covered Loans [Member] | Pass [Member] | Commercial Real Estate - Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	87,509	148,579
Covered Loans [Member] | Pass [Member] | Commercial Business [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	23,380	30,710
Covered Loans [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	22,745	57,880
Covered Loans [Member] | Special Mention [Member] | Commercial Real Estate Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	1,928	7,401
Covered Loans [Member] | Special Mention [Member] | Commercial Real Estate - Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	20,422	49,699
Covered Loans [Member] | Special Mention [Member] | Commercial Business [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	395	780
Covered Loans [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	68,535	183,127
Covered Loans [Member] | Substandard [Member] | Commercial Real Estate Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	8,008	23,891
Covered Loans [Member] | Substandard [Member] | Commercial Real Estate - Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	51,252	144,680
Covered Loans [Member] | Substandard [Member] | Commercial Business [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	9,275	14,556
Covered Loans [Member] | Doubtful [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification		4,748
Covered Loans [Member] | Doubtful [Member] | Commercial Real Estate Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification		497
Covered Loans [Member] | Doubtful [Member] | Commercial Real Estate - Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification		3,267
Covered Loans [Member] | Doubtful [Member] | Commercial Business [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification		984
Covered Loans [Member] | Internally Assigned Grade Loss [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	236,900	467,930
Discount	(16,514)	(43,573)
Balance at end of period	220,386	424,357
Covered Loans [Member] | Internally Assigned Grade Loss [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at end of period	224,158	295,436
Covered Loans [Member] | Internally Assigned Grade Loss [Member] | Commercial Real Estate Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	44,667	74,675
Covered Loans [Member] | Internally Assigned Grade Loss [Member] | Commercial Real Estate - Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	159,183	346,225
Covered Loans [Member] | Internally Assigned Grade Loss [Member] | Commercial Business [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	33,050	47,030
Covered Loans [Member] | Internally Assigned Grade Loss [Member] | Residential Prime [Member] | Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at end of period	128,024	154,025
Covered Loans [Member] | Internally Assigned Grade Loss [Member] | Home Equity [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at end of period	92,430	137,122
Covered Loans [Member] | Internally Assigned Grade Loss [Member] | Credit Card [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at end of period	648	679
Covered Loans [Member] | Internally Assigned Grade Loss [Member] | Consumer - Other [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at end of period	$ 3,056	$ 3,610

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Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

Schedule of Calculation of Basic and Diluted Earnings Per Share

The following table presents the calculation of basic and diluted earnings per share for the periods indicated.

	For the Years Ended December 31
(In thousands, except per share data)	2014			2013			2012
Income available to common shareholders	$	105,450		$	65,103		$	76,395
Earnings to unvested restricted stock		(1,652	)		(1,206	)		(1,443	)
Earnings to common shareholders - basic		103,798			63,897			74,952
Earnings reallocated to unvested restricted stock		(33	)		(3	)		6
Earnings to common shareholders - diluted	$	103,765		$	63,894		$	74,958
Weighted average shares outstanding - basic		31,307			29,052			28,901
Potential common shares		126			53			57
Weighted average shares outstanding - diluted		31,433			29,105			28,958
Weighted average shares outstanding - unvested restricted stock		518			553			553
Earnings per common share - basic	$	3.32		$	2.20		$	2.59
Earnings per common share - diluted		3.30			2.20			2.59
Earnings per unvested restricted stock share - basic		3.19			2.18			2.61
Earnings per unvested restricted stock share - diluted		3.13			2.18			2.60

Schedule of Basic Earnings Per Common Share

Additional information on the Company’s basic earnings per common share is shown in the following table.

	For the Years Ended December 31
(Dollars in thousands, except per share data)	2014		2013		2012
Distributed earnings to common shareholders	$	43,623	$	39,685	$	39,349
Undistributed earnings to common shareholders		60,175		24,212		35,603
Total earnings to common shareholders	$	103,798	$	63,897	$	74,952
Distributed earnings to unvested restricted stock	$	694	$	749	$	758
Undistributed earnings to unvested restricted stock		958		457		685
Total earnings allocated to unvested restricted stock	$	1,652	$	1,206	$	1,443
Distributed earnings per common share	$	1.40	$	1.37	$	1.36
Undistributed earnings per common share		1.92		0.83		1.23
Total earnings per common share	$	3.32	$	2.20	$	2.59
Distributed earnings per unvested restricted stock share	$	1.34	$	1.35	$	1.37
Undistributed earnings per unvested restricted stock share		1.85		0.83		1.24
Total earnings per unvested restricted stock share	$	3.19	$	2.18	$	2.61

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Shareholders' Equity and Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Dec. 31, 2014

Equity [Abstract]

Summary of Tax Effects of Each Component of Other Comprehensive Income

The following is a summary of the tax effects of each component of other comprehensive income for the years ended December 31:

	2014
(Dollars in thousands)	Before Tax			Tax Expense			Net-of-Tax Amount
Unrealized gain on securities:
Unrealized holding gains arising during the period	$	37,719		$	(13,202	)	$	24,517
Reclassification adjustment for gains included in net income		(771	)		270			(501	)
Net unrealized gains		36,948			(12,932	)		24,016
Fair value of derivative instruments designated as cash flow hedges
Change in fair value of derivative instruments designated as cash flow hedges during the period	$	—		$	—		$	—
Reclassification adjustment for losses included in net income		—			—			—
Fair value of derivative instruments designated as cash flow hedges		—			—			—
Total other comprehensive income	$	36,948		$	(12,932	)	$	24,016
	2013
(Dollars in thousands)	Before Tax			Tax  Benefit			Net-of-Tax Amount
Unrealized loss on securities:
Unrealized holding losses arising during the period	$	(62,095	)	$	21,733		$	(40,362	)
Reclassification adjustment for gains included in net income		(2,277	)		797			(1,480	)
Net unrealized losses		(64,372	)		22,530			(41,842	)
Fair value of derivative instruments designated as cash flow hedges
Change in fair value of derivative instruments designated as cash flow hedges during the period	$	953		$	(333	)	$	620
Reclassification adjustment for losses included in net income		391			(137	)		254
Fair value of derivative instruments designated as cash flow hedges		1,344			(470	)		874
Total other comprehensive loss	$	(63,028	)	$	22,060		$	(40,968	)
	2012
(Dollars in thousands)	Before Tax			Tax Expense			Net-of-Tax Amount
Unrealized loss on securities:
Unrealized holding gains arising during the period	$	2,174		$	(761	)	$	1,413
Reclassification adjustment for gains included in net income		(3,739	)		1,308			(2,431	)
Net unrealized losses		(1,565	)		547			(1,018	)
Fair value of derivative instruments designated as cash flow hedges
Change in fair value of derivative instruments designated as cash flow hedges during the period	$	(22	)	$	8		$	(14	)
Reclassification adjustment for losses included in net income		1,618			(566	)		1,052
Fair value of derivative instruments designated as cash flow hedges		1,596			(558	)		1,038
Total other comprehensive income	$	31		$	(11	)	$	20

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Acquisition and Disposition Activity - Schedule of Business Acquisitions by Acquisition, Equity Interest Issued or Issuable (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended		12 Months Ended	0 Months Ended
	Jan. 17, 2014	May 31, 2014	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013	Dec. 31, 2012
Non-Equity consideration
Cash	$ 91,600
Goodwill	8,600		517,526		401,872	401,872
Teche [Member]
Equity consideration
Common stock issued			156,026
Common stock issued, Number of Shares			2,498,007
Total equity consideration			156,026
Non-Equity consideration
Cash			714
Total consideration paid		156,700	156,740
Fair value of net assets assumed including identifiable intangible assets			76,311
Goodwill		80,400	80,429
First Private [Member]
Equity consideration
Common stock issued			58,639
Common stock issued, Number of Shares			847,509
Total equity consideration			58,639
Non-Equity consideration
Cash			1
Total consideration paid			58,640	58,600
Fair value of net assets assumed including identifiable intangible assets			32,387
Goodwill			$ 26,253	$ 26,300

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Business Segments - Schedule of Segment Reporting Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Interest income	$ 137,276	$ 133,793	$ 119,514	$ 114,232	$ 114,092	$ 108,512	$ 108,177	$ 106,416	$ 504,815	$ 437,197	$ 445,200
Interest expense	12,596	12,042	10,241	9,824	10,654	11,060	11,695	13,545	44,704	46,953	63,450
Net interest income	124,680	121,751	109,273	104,408	103,438	97,452	96,482	92,871	460,111	390,244	381,750
Provision for loan losses	6,495	5,714	4,748	2,103	4,700	2,014	1,807	(3,377)	19,060	5,145	20,671
Mortgage income									51,797	64,197	78,053
Title income									20,492	20,526	20,987
Other non-interest income									101,339	84,235	76,957
Core deposit intangible amortization									5,569	4,499	4,900
Other non-interest expenses									468,910	468,586	427,285
Income (loss) before income taxes	45,875	42,789	20,977	30,558	34,779	30,549	19,803	(4,159)	140,200	80,972	104,891
Income tax provision	9,939	11,897	4,750	8,163	9,175	7,357	4,213	(4,876)	34,750	15,869	28,496
Net income	35,936	30,892	16,227	22,395	25,604	23,192	15,590	717	105,450	65,103	76,395
Total loans and loans held for sale, net of unearned income	11,581,116				9,620,461				11,581,116	9,620,461	8,766,055
Total assets	15,758,605				13,365,550				15,758,605	13,365,550	13,129,678
Total deposits	12,520,525				10,737,000				12,520,525	10,737,000	10,748,277
Average assets									14,632,685	13,003,988	12,096,972
IBERIABANK [Member]
Segment Reporting Information [Line Items]
Interest income									498,820	431,418	439,245
Interest expense									42,983	45,150	61,349
Net interest income									455,837	386,268	377,896
Provision for loan losses									18,966	5,123	20,550
Mortgage income									71	2	6
Other non-interest income									101,401	84,243	76,967
Core deposit intangible amortization									5,569	4,499	4,900
Allocated expenses									(11,602)	(7,453)	(3,282)
Other non-interest expenses									407,461	402,170	361,428
Income (loss) before income taxes									136,915	66,174	71,273
Income tax provision									33,419	10,035	15,192
Net income									103,496	56,139	56,081
Total loans and loans held for sale, net of unearned income	11,415,973				9,472,908				11,415,973	9,472,908	8,485,363
Total assets	15,538,432				13,167,162				15,538,432	13,167,162	12,796,811
Total deposits	12,515,329				10,734,030				12,515,329	10,734,030	10,745,528
Average assets									14,431,459	12,794,997	11,879,761
IMC [Member]
Segment Reporting Information [Line Items]
Interest income									5,992	5,747	5,858
Interest expense									1,721	1,803	2,101
Net interest income									4,271	3,944	3,757
Provision for loan losses									94	22	121
Mortgage income									51,726	64,195	78,047
Other non-interest income									(61)	(10)	(10)
Allocated expenses									8,203	5,417	2,340
Other non-interest expenses									44,761	49,723	49,084
Income (loss) before income taxes									2,878	12,967	30,249
Income tax provision									1,148	5,093	11,871
Net income									1,730	7,874	18,378
Total loans and loans held for sale, net of unearned income	165,143				147,553				165,143	147,553	280,692
Total assets	194,156				173,131				194,156	173,131	308,152
Total deposits	5,196				2,970				5,196	2,970	2,749
Average assets									176,003	183,513	194,832
LTC [Member]
Segment Reporting Information [Line Items]
Interest income									3	32	97
Net interest income									3	32	97
Title income									20,492	20,526	20,987
Other non-interest income									(1)	2
Allocated expenses									3,399	2,036	942
Other non-interest expenses									16,688	16,693	16,773
Income (loss) before income taxes									407	1,831	3,369
Income tax provision									183	741	1,433
Net income									224	1,090	1,936
Total assets	26,017				25,257				26,017	25,257	24,715
Average assets									$ 25,223	$ 25,478	$ 22,379

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Goodwill and Other Acquired Intangible Assets - Schedule of Definite-Lived Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 57,665	$ 46,754
Accumulated Amortization	(37,304)	(31,415)
Net Carrying Amount	20,361	15,339
Core Deposit Intangibles [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	55,949	45,406
Accumulated Amortization	(36,354)	(30,784)
Net Carrying Amount	19,595	14,622
Customer Relationship Intangible Asset [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,348	1,348
Accumulated Amortization	(822)	(631)
Net Carrying Amount	526	717
Noncompete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	163
Accumulated Amortization	(82)
Net Carrying Amount	81
Other Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	205
Accumulated Amortization	(46)
Net Carrying Amount	$ 159

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Fair Value Measurements - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities, Assets	$ 2,158,853,000	$ 1,936,797,000
Mortgage loans held for sale, Assets	139,950,000	97,273,000
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities, Assets	2,158,853,000	1,936,797,000
Mortgage loans held for sale, Assets	139,950,000	97,273,000
Derivative instruments, Assets	32,903,000	30,076,000
Total, Assets	2,331,706,000	2,064,146,000
Derivative instruments, Liabilities	31,354,000	26,735,000
Total, Liabilities	31,354,000	26,735,000
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities, Assets		15,496,000
Total, Assets		15,496,000
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities, Assets	2,158,853,000	1,921,301,000
Mortgage loans held for sale, Assets	139,950,000	97,273,000
Derivative instruments, Assets	32,903,000	30,076,000
Total, Assets	2,331,706,000	2,048,650,000
Derivative instruments, Liabilities	31,354,000	26,735,000
Total, Liabilities	$ 31,354,000	$ 26,735,000

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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule Of Significant Accounting Policies [Line Items]
Required reserve cash balances	$ 17.4	$ 6.7
Number of days due to be considered for accrual interest on loans discontinued (in days)	90 days
Number of days due to be considered for accrual interest on loans discontinued for mortgage, credit card & personal loan (in days)	180 days
Rate lock period (days)	60 days
Treasury stock, shares	1,809,497	2,130,841
Property write-downs	3.8	4.8	6.4
Minimum [Member] | Buildings [Member]
Schedule Of Significant Accounting Policies [Line Items]
Premises and equipment, useful life	10 years
Minimum [Member] | Furniture, Fixtures and Equipment [Member]
Schedule Of Significant Accounting Policies [Line Items]
Premises and equipment, useful life	3 years
Maximum [Member] | Customer Relationship [Member]
Schedule Of Significant Accounting Policies [Line Items]
Amortized intangible assets average life (in years)	10 years
Maximum [Member] | Buildings [Member]
Schedule Of Significant Accounting Policies [Line Items]
Premises and equipment, useful life	40 years
Maximum [Member] | Furniture, Fixtures and Equipment [Member]
Schedule Of Significant Accounting Policies [Line Items]
Premises and equipment, useful life	15 years
Covered Loans [Member]
Schedule Of Significant Accounting Policies [Line Items]
Reversal of allowance for loan losses	45
Impaired Loan [Member]
Schedule Of Significant Accounting Policies [Line Items]
Reversal of allowance for loan losses	$ 9
Commercial [Member]
Schedule Of Significant Accounting Policies [Line Items]
Loss sharing indemnification agreements, terms	5 years
Single Family Residential [Member]
Schedule Of Significant Accounting Policies [Line Items]
Loss sharing indemnification agreements, terms	10 years
IBERIABANK Corporation [Member]
Schedule Of Significant Accounting Policies [Line Items]
Number of operating states	6
IMC [Member]
Schedule Of Significant Accounting Policies [Line Items]
Number of operating states	12

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Derivative Instruments and Other Hedging Activities (Tables)

12 Months Ended

Dec. 31, 2014

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Outstanding Derivative Instruments

Information pertaining to outstanding derivative instruments is as follows:

	Balance Sheet	Asset Derivatives Fair Value				Balance Sheet	Liability Derivatives Fair Value
(Dollars in thousands)	Location	December 31, 2014		December 31, 2013		Location	December 31, 2014		December 31, 2013
Derivatives not designated as hedging instruments under ASC Topic 815:
Interest rate contracts	Other assets	$	15,434	$	10,621	Other liabilities	$	15,434	$	10,620
Forward sales contracts	Other assets		25		1,468	Other liabilities		2,556		287
Written and purchased options	Other assets		17,444		17,987	Other liabilities		13,364		15,828
Total		$	32,903	$	30,076		$	31,354	$	26,735
		Asset Derivatives Notional Amount					Liability Derivatives Notional Amount
(Dollars in thousands)		December 31, 2014		December 31, 2013			December 31, 2014		December 31, 2013
Derivatives not designated as hedging instruments under ASC Topic 815:
Interest rate contracts		$	444,703	$	380,303		$	444,703	$	380,303
Forward sales contracts			15,897		192,876			391,992		45,091
Written and purchased options			362,580		295,425			225,741		199,061
Total		$	823,180	$	868,604		$	1,062,436	$	624,455

Reconciliation of Gross Amounts in Consolidated Balance Sheets

The following table reconciles the gross amounts presented in the consolidated balance sheets to the net amounts that would result in the event of offset.

	December 31, 2014
(Dollars in thousands) Derivatives subject to master netting arrangements	Gross Amounts		Gross Amounts Not Offset
	Presented in the		in the Balance Sheet
	Balance Sheet		Derivatives		Collateral (1)			Net
Derivative assets
Interest rate contracts designated as hedging instruments	$	—	$	—	$	—		$	—
Interest rate contracts not designated as hedging instruments		15,411		—		—			15,411
Written and purchased options		13,387		—		—			13,387
Total derivative assets subject to master netting arrangements	$	28,798	$	—	$	—		$	28,798
Derivative liabilities
Interest rate contracts designated as hedging instruments	$	—	$	—	$	—		$	—
Interest rate contracts not designated as hedging instruments		15,411		—		(3,735	)		11,676
Total derivative liabilities subject to master netting arrangements	$	15,411	$	—	$	(3,735	)	$	11,676

⁽¹⁾  Consists of cash collateral recorded at cost, which approximates fair value, and investment securities.

	December 31, 2013
(Dollars in thousands) Derivatives subject to master netting arrangements	Gross Amounts		Gross Amounts Not Offset
	Presented in the		in the Balance Sheet
	Balance Sheet		Derivatives		Collateral (1)			Net
Derivative assets
Interest rate contracts designated as hedging instruments	$	—	$	—	$	—		$	—
Interest rate contracts not designated as hedging instruments		10,621		—		—			10,621
Written and purchased options		15,801		—		—			15,801
Total derivative assets subject to master netting arrangements	$	26,422	$	—	$	—		$	26,422
Derivative liabilities
Interest rate contracts designated as hedging instruments	$	—	$	—	$	—		$	—
Interest rate contracts not designated as hedging instruments		10,620		—		(5,419	)		5,201
Total derivative liabilities subject to master netting arrangements	$	10,620	$	—	$	(5,419	)	$	5,201

⁽¹⁾  Consists of cash collateral recorded at cost, which approximates fair value, and investment securities.

Effect of Hedging Instruments on Consolidated Financial Statements

At December 31, 2014 and 2013, and for years then ended, information pertaining to the effect of the hedging instruments on the consolidated financial statements is as follows:

(Dollars in thousands)	Amount of Gain (Loss) Recognized in OCI net of taxes (Effective Portion)				Location of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective  Portion)					Location of Gain (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing	Amount of Gain (Loss) Recognized in Income on Derivative (Ineffective Portion  and Amount Excluded from Effectiveness Testing)
	As of December 31					For the Years Ended December 31
	2014		2013			2014		2013				2014			2013
Derivatives in ASC Topic 815 Cash Flow Hedging Relationships
Interest rate contracts	$	—	$	—	Other income (expense)	$	—	$	(392	)	Other income (expense)	$	(1	)	$	1
Total	$	—	$	—		$	—	$	(392	)		$	(1	)	$	1

(Dollars in thousands)
	Location of Gain (Loss) Recognized in Income on Derivatives	Amount of Gain (Loss) Recognized in Income on Derivatives
		2014			2013
Derivatives Not Designated as Hedging Instruments under ASC Topic 815
Interest rate contracts	Other income (expense)	$	2,513		$	2,991
Forward sales contracts	Mortgage Income		(3,225	)		(1,716	)
Written and purchased options	Mortgage Income		(5,739	)		(3,032	)
Total		$	(6,451	)	$	(1,757	)

Outstanding Interest Rate Swap Agreements Not Designated as Hedging Instruments

At December 31, additional information pertaining to outstanding interest rate swap agreements not designated as hedging instruments is as follows:

(Dollars in thousands)	2014			2013
Weighted average pay rate		2.9	%		3.0	%
Weighted average receive rate		0.4	%		0.2	%
Weighted average maturity in years		7.7	yrs		7.6	yrs
Unrealized gain (loss) relating to interest rate swaps	$	—		$	—

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Recent Accounting Pronouncements

12 Months Ended

Dec. 31, 2014

Accounting Changes and Error Corrections [Abstract]

Recent Accounting Pronouncements

NOTE 2 – RECENT ACCOUNTING PRONOUNCEMENTS

ASU No. 2014-01

In January 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-01, Investments – Equity Method and Joint Ventures, in order to provide guidance on accounting for investments in flow-through limited liability entities that manage or invest in affordable housing projects that qualify for low-income housing tax credits (“LIHTC”). Through the Company’s investments in these entities, the Company receives tax credits and/or tax deductions from operating losses, which are allowable on the Company’s filed income tax returns over a 10-year period, subject to recapture over a 15-year period beginning with the first year the tax credits are earned.

Under current U.S. generally accepted accounting principles (“U.S. GAAP”), the Company may elect to account for the investments using the effective yield method if certain conditions are met, and if they are not met, the investments are accounted for under either the equity method or the cost method. The Company currently accounts for its investments under the equity method. The provisions of ASU No. 2014-01 permit the Company to make an accounting policy election to account for its investments in LIHTC entities using the proportional amortization method if certain conditions are met. Under the proportional amortization method, the Company would amortize the initial cost of the investment in proportion to the tax credits and other tax benefits received and recognize the net investment performance in the Company’s consolidated statements of comprehensive income as a component of income tax expense or benefit. ASU No. 2014-01 would also require the Company to disclose information that enables users of the consolidated financial statements to understand the nature of the Company’s investments, the measurement of these investments, and their effect on the Company’s financial position and results of operations.

ASU No. 2014-01 is effective beginning with the Company’s first quarter ending March 31, 2015. When adopted, the provisions of ASU No. 2014-01 would be applied retrospectively to all financial statement periods presented. The Company is currently assessing the effect of the change, but does not anticipate that a change would be material to the financial condition, results of operations, or liquidity of the Company. The expanded disclosures required by ASU No. 2014-01 will be incorporated in the Company’s future consolidated financial statements upon adoption.

ASU No. 2014-04

In January 2014, the FASB issued ASU No. 2014-04, Receivables-Troubled Debt Restructurings by Creditors: Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans Upon Foreclosure, in order to clarify when a creditor should reclassify mortgage loans collateralized by residential real estate from their loan portfolio to other real estate owned (“OREO”) upon foreclosure. ASU No. 2014-04 clarifies that an in-substance repossession or foreclosure has occurred when either the creditor obtains legal title to the property or the borrower conveys all interest in the property to the creditor to satisfy the loan through completion of a deed in-lieu-of foreclosure or similar legal agreement. Additionally, ASU No. 2014-04 requires the Company to disclose both the amount of foreclosed residential real estate property held and the investment in consumer mortgage loans collateralized by residential real estate that are in the process of foreclosure.

ASU No. 2014-04 is effective beginning with the Company’s first quarter ending March 31, 2015. When adopting the provisions of ASU No. 2014-04, the Company could apply the provisions using either a prospective transition method or a modified retrospective method. The Company is currently assessing the effect that the adoption would have on its consolidated financial statements, but does not anticipate that adoption would materially affect the Company’s financial condition, results of operations, or liquidity. The expanded disclosures required by this ASU will be incorporated in the Company’s future consolidated financial statements upon adoption.

ASU No. 2014-09

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, which implements a common revenue standard and clarifies the principles used for recognizing revenue. The amendments in the ASU clarify that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. As part of that principle, the entity should identify the contract(s) with the customer, identify the performance obligation(s) of the contract, determine the transaction price, allocate that transaction price to the performance obligation(s) of the contract, and then recognize revenue when or as the entity satisfies the performance

obligation(s).

ASU No. 2014-09 is effective beginning with the Company’s first quarter ending March 31, 2017. The Company is currently assessing the effect, but does not expect that such adoption will have a significant impact on the Company’s consolidated financial statements.

ASU No. 2014-11

In June 2014, the FASB issued ASU No. 2014-11, Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosure, which will implement two accounting changes.

ASU No. 2014-11 changes the accounting for repurchase-to-maturity transactions to secured borrowing accounting. For repurchase financing arrangements, ASU No. 2014-11 requires separate accounting for a transfer of a financial asset executed contemporaneously with a repurchase agreement with the same counterparty, which will result in secured borrowing accounting for the repurchase agreement. The amendments in ASU No. 2014-11 also require certain disclosures for transfers of financial assets and repurchase agreements.

ASU No. 2014-11 is effective beginning with the Company’s first quarter ending March 31, 2015. Early adoption is not permitted. Changes will be applied as a cumulative-effect adjustment to retained earnings at the beginning of the adoption period. The disclosures of certain transactions accounted for as a sale is required to be presented beginning with the Company’s first quarter ending March 31, 2015. The company is currently assessing the effect, but does not expect that such adoption will have a significant impact on the Company’s consolidated financial statements.

ASU No. 2014-14

In August 2014, the FASB issued ASU No. 2014-14, Receivables - Troubled Debt Restructurings by Creditors: Classification of Certain

Government-Guaranteed Mortgage Loans Upon Foreclosure, in order to clarify how creditors classify government-guaranteed mortgage loans upon foreclosure, including loans guaranteed by the Federal Housing Administration (“FHA”) of the U.S. Department of Housing and Urban Development and the U.S. Department of Veteran Affairs (“VA”).

ASU No. 2014-14 clarifies that a mortgage loan should be derecognized and that a separate other receivable be recognized upon foreclosure in creditor financial statements if 1) the loan has a government guarantee that is not separable from the loan before foreclosure, 2) at the time of foreclosure the creditor has the intent to convey the real estate property to the guarantor and make a claim on the guarantee, and 3) at the time of foreclosure, any amount of the claim that is determined on the basis of the fair value of the real estate is fixed. Upon foreclosure, the separate other receivable should be measured based on the amount of the loan balance, including principal and interest, expected to be recovered from the guarantor.

ASU No. 2014-14 is effective beginning with the Company’s first quarter ending March 31, 2015, using either a prospective transition method (application of the amendments of the ASU to foreclosures occurring after the adoption date) or modified retrospective transition method (by means of a cumulative-effect adjustment through a reclassification to a separate other receivable). The Company is currently assessing the effect but does not expect that such adoption will have a significant impact on the Company’s consolidated financial statements.

ASU No. 2014-15

In August 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements – Going Concern: Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern, which requires management to evaluate whether there are conditions or events that raise substantial doubt about an entity’s ability to continue as a going concern and to provide related footnote disclosures. ASU No. 2014-15 will require management to perform a going concern evaluation similar to the auditor’s evaluation required by standards issued by the Public Company Accounting Oversight Board (“PCAOB”) and American Institute of Public Accountants (“AICPA”).

ASU No. 2014-15 is effective for annual periods ending after December 15, 2016 and for annual and interim periods thereafter. Early application is permitted. The Company does not expect that such adoption will have a significant impact on the Company’s consolidated financial statements.

ASU No. 2014-16

In November 2014, the FASB issued ASU No. 2014-16, Derivatives and Hedging: Determining Whether the Host Contract in a Hybrid Financial Instrument Issued in the Form of a Share Is More Akin to Debt or to Equity, which requires management to assess each existing hybrid financial instrument issued in the form of a share to determine whether any of those hybrid financial instruments contain one or more embedded derivative features. The guidance clarifies that an entity should consider the economic characteristics and risks of the entire hybrid financial instrument, including the embedded derivative being evaluated for bifurcation, in evaluating the nature of the host contract.

ASU No. 2014-16 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. Early adoption, including adoption in an interim period, is permitted. If an entity early adopts the amendments in an interim period, any adjustment shall be reflected as of the beginning of the fiscal year that includes that interim period. The Company does not expect that such adoption will have a significant impact on the Company’s consolidated financial statements.

ASU No. 2014-17

In November 2014, the FASB issued ASU No. 2014-17, Business Combinations: Pushdown Accounting, which provides an acquired entity guidance on whether and at what threshold it can apply pushdown accounting in its separate financial statements upon occurrence of an event in which an acquirer obtains control of the acquired entity. If an acquired entity elects the option to apply pushdown accounting in its separate financial statements, it should disclose information in the current reporting period that enables the users of financial statements to evaluate the effect of pushdown accounting.

ASU No. 2014-17 became effective on November 18, 2014. After the effective date, an acquired entity can make an election to apply the guidance to future change-in control events or to its most recent change-in-control event. If the financial statements for the period in which the most recent change-in-control event occurred have already been issued or made available to be issued, the application of ASU No. 2014-17 would be a change in accounting principle. Adoption will not have a significant impact on the Company’s consolidated financial statements.

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Share-Based Compensation - Activity Related to Stock Options (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Number of shares, Outstanding options, Beginning balance	1,072,829	1,236,075	1,097,620
Number of shares, Outstanding options, Granted	77,434	75,722	230,665
Number of shares, Issued in connection with acquisition			32,863
Number of shares, Outstanding options, Exercised	(267,421)	(200,748)	(92,092)
Number of shares, Outstanding options, Forfeited or expired	(15,160)	(38,220)	(32,981)
Number of shares, Outstanding options, Ending balance	867,682	1,072,829	1,236,075
Weighted Average Exercise Price, Outstanding options, Beginning balance	$ 53.47	$ 51.48	$ 50.14
Number of shares, Exercisable options	562,752	707,934	792,444
Weighted Average Exercise Price, Outstanding options, Granted	$ 65.31	$ 52.36	$ 51.69
Weighted Average Exercise Price, Issued in connection with acquisition			$ 41.30
Weighted Average Exercise Price, Outstanding options, Exercised	$ 48.57	$ 40.35	$ 30.43
Weighted Average Exercise Price, Outstanding options, Forfeited or expired	$ 60.38	$ 55.87	$ 56.79
Weighted Average Exercise Price, Outstanding options, Ending balance	$ 55.92	$ 53.47	$ 51.48
Weighted Average Exercise Price, Exercisable options	$ 55.92	$ 53.54	$ 50.05
Aggregate Intrinsic Value, Exercised	$ 4,612	$ 2,740	$ 1,765
Aggregate Intrinsic Value, Outstanding options	8,220
Aggregate Intrinsic Value, Exercisable options	$ 5,449
Weighted Average Remaining Contract Life, Outstanding options	5 years 1 month 6 days
Weighted Average Remaining Contract Life, Exercisable options	3 years 8 months 12 days

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Derivative Instruments and Other Hedging Activities - Schedule of Outstanding Derivative Instruments (Detail) (Not Designated as Hedging Instruments [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Notional Amount	$ 823,180	$ 868,604
Derivative Liability, Notional Amount	1,062,436	624,455
Forward Sales Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Notional Amount	15,897	192,876
Derivative Liability, Notional Amount	391,992	45,091
Interest Rate Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Notional Amount	444,703	380,303
Derivative Liability, Notional Amount	444,703	380,303
Written and Purchased Options [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Notional Amount	362,580	295,425
Derivative Liability, Notional Amount	225,741	199,061
Other Assets [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Fair Value	32,903	30,076
Other Assets [Member] | Forward Sales Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Fair Value	25	1,468
Other Assets [Member] | Interest Rate Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Fair Value	15,434	10,621
Other Assets [Member] | Written and Purchased Options [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Fair Value	17,444	17,987
Other Liabilities [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liability, Fair Value	31,354	26,735
Other Liabilities [Member] | Forward Sales Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liability, Fair Value	2,556	287
Other Liabilities [Member] | Interest Rate Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liability, Fair Value	15,434	10,620
Other Liabilities [Member] | Written and Purchased Options [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liability, Fair Value	$ 13,364	$ 15,828

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Recent Accounting Pronouncements - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014
Equity Method Investments and Joint Ventures [Abstract]
Income tax examination description	The Company receives tax credits and/or tax deductions from operating losses, which are allowable on the Company's filed income tax returns over a 10-year period, subject to recapture over a 15-year period beginning with the first year the tax credits are earned.

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Long-Term Debt - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Nov. 30, 2007	Mar. 31, 2008
Debt Instrument [Line Items]
FHLB advance amortization period, in years, minimum	2 years
FHLB advance amortization period, in years, maximum	20 years
Weighted average advance rate on FHLB advances	3.24%	3.95%
Line of credit facility, maximum borrowing capacity	$ 155,000,000
Junior subordinated debt	111,862,000	111,862,000
Debentures maturity term, years	30 years
Debentures earliest call date, years	5 years
Debentures earliest call date, quarterly	60 months
Issuance completed 2007 [Member]
Debt Instrument [Line Items]
Junior subordinated debt			25,800,000
Statutory Trust I, 3 Month LIBOR Plus 3.25% [Member]
Debt Instrument [Line Items]
Junior subordinated debt	10,310,000	10,310,000
Statutory Trust I, 3 Month LIBOR Plus 3.25% [Member] | Issuance completed 2002 [Member]
Debt Instrument [Line Items]
Junior subordinated debt	10,300,000	10,300,000
Statutory Trust II, 3 Month LIBOR Plus 3.15% [Member]
Debt Instrument [Line Items]
Junior subordinated debt	10,310,000	10,310,000
Statutory Trust II, 3 Month LIBOR Plus 3.15% [Member] | Issuance Completed 2003 [Member]
Debt Instrument [Line Items]
Junior subordinated debt	10,300,000	10,300,000
Statutory Trust III, 3 Month LIBOR Plus 2.00% [Member]
Debt Instrument [Line Items]
Junior subordinated debt	10,310,000	10,310,000
Statutory Trust III, 3 Month LIBOR Plus 2.00% [Member] | Issuance completed 2004 [Member]
Debt Instrument [Line Items]
Junior subordinated debt	10,300,000	10,300,000
Statutory Trust V, 3 Month LIBOR Plus 1.435% [Member]
Debt Instrument [Line Items]
Junior subordinated debt	10,310,000	10,310,000
Statutory Trust V, 3 Month LIBOR Plus 1.435% [Member] | Issuance completed 2007 [Member]
Debt Instrument [Line Items]
Junior subordinated debt	10,300,000	10,300,000
Statutory Trust IV, 3 Month LIBOR Plus 1.60% [Member]
Debt Instrument [Line Items]
Junior subordinated debt	15,464,000	15,464,000
Statutory Trust IV, 3 Month LIBOR Plus 1.60% [Member] | Issuance completed 2006 [Member]
Debt Instrument [Line Items]
Junior subordinated debt	15,500,000	15,500,000
American Horizons Statutory Trust I, 3 Month LIBOR Plus 3.15% [Member]
Debt Instrument [Line Items]
Junior subordinated debt	6,186,000	6,186,000
American Horizons Statutory Trust I, 3 Month LIBOR Plus 3.15% [Member] | Issuance Completed 2003 [Member]
Debt Instrument [Line Items]
Junior subordinated debt	6,200,000	6,200,000
Statutory Trust VIII, 3 Month LIBOR Plus 3.50% [Member]
Debt Instrument [Line Items]
Junior subordinated debt	7,217,000	7,217,000
Statutory Trust VIII, 3 Month LIBOR Plus 3.50% [Member] | Issuance completed 2008 [Member]
Debt Instrument [Line Items]
Junior subordinated debt				7,200,000
OMNI Trust I, 3 Month LIBOR Plus 3.30% [Member]
Debt Instrument [Line Items]
Junior subordinated debt	8,248,000	8,248,000
OMNI Trust I, 3 Month LIBOR Plus 3.30% [Member] | Issuance completed 2011[Member]
Debt Instrument [Line Items]
Junior subordinated debt	8,200,000	8,200,000
OMNI Trust II, 3 Month LIBOR Plus 2.79% [Member]
Debt Instrument [Line Items]
Junior subordinated debt	7,732,000	7,732,000
OMNI Trust II, 3 Month LIBOR Plus 2.79% [Member] | Issuance completed 2011[Member]
Debt Instrument [Line Items]
Junior subordinated debt	7,700,000	7,700,000
Blanket Floating Lien [Member]
Debt Instrument [Line Items]
Additional advances available from FHLB	2,800,000,000
Pledge of Investment Securities [Member]
Debt Instrument [Line Items]
Additional advances available from FHLB	$ 736,300,000

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Share-Based Compensation - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity awards settled in cash	$ 0	$ 0
Share-based compensation maximum option term (in years)	10 years
Future awards shares under approved incentive compensation plans	1,038,945
Contributions made by the company to 401(k) plan	1,500,000	1,300,000	1,300,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unearned share-based compensation associated with awards	19,800,000	21,100,000
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unearned share-based compensation associated with awards	$ 3,200,000
Unrecognized compensation cost related to stock options expected to be recognized over a weighted-average period	5 years 1 month 6 days
Restricted Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	3 years
Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	3 years
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	1 year 6 months
Unearned compensation vesting period (in years)	3 years
Minimum [Member] | Phantom Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	5 years
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	7 years
Unearned compensation vesting period (in years)	7 years
Maximum [Member] | Phantom Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	7 years

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Transfers and Servicing of Financial Assets (Including Mortgage Banking Activity) (Tables)

12 Months Ended

Dec. 31, 2014

Transfers and Servicing [Abstract]

Changes in Carrying Amount of Mortgage Loans Held-for-sale

Changes to the carrying amount of mortgage loans held for sale at December 31 are presented in the following table.

(Dollars in thousands)	2014			2013			2012
Balance at beginning of period	$	128,442		$	267,475		$	153,013
Originations and Purchases		1,675,538			2,116,460			2,432,367
Sales, net of gains		(1,657,409	)		(2,255,493	)		(2,317,905	)
Other		(6,499	)		—			—
Balance at end of period	$	140,072		$	128,442		$	267,475

Components of Mortgage Income

The following table details the components of mortgage income for the years ended December 31:

(Dollars in thousands)	2014			2013			2012
Fair value changes of derivatives and mortgage loans held for sale:
Mortgage loans held for sale and derivatives	$	631		$	(4,822	)	$	6,772
Derivative settlements		(8,743	)		3,100			—
Gains on sales		59,156			65,393			70,811
Servicing and other income, net		753			526			470
	$	51,797		$	64,197		$	78,053

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Related Party Transactions

12 Months Ended

Dec. 31, 2014

Related Party Transactions [Abstract]

Related Party Transactions

NOTE 22 – RELATED PARTY TRANSACTIONS

In the ordinary course of business, the Company has granted loans to executive officers and directors and their affiliates amounting to $0.1 million and $0.1 million at December 31, 2014 and 2013, respectively. During the years ended December 31, 2014, 2013, and 2012, total principal additions were $60,000, $41,000, and $252,000, respectively. Total principal payments were $0.1 million, $0.7 million, and $0.9 million for the years ended December 31, 2014, 2013, and 2012, respectively. Unfunded commitments to executive officers and directors and their affiliates totaled $30,000 and $37,000 at December 31, 2014 and 2013, respectively. None of the related party loans were classified as nonaccrual, past due, restructured or potential problem loans at December 31, 2014 or 2013.

Deposits from related parties held by the Company through IBERIABANK at December 31, 2014 and 2013 amounted to $3.0 million and $5.9 million, respectively.

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Commitments and Contingencies

12 Months Ended

Dec. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

NOTE 21 – COMMITMENTS AND CONTINGENCIES

Off-balance sheet commitments

The Company is party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments of the Company to extend credit and standby letters of credit to or on behalf of particular customers. Such commitments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the consolidated balance sheets. The credit policies used for these commitments are consistent with those used for on-balance sheet instruments. The Company’s exposure to credit loss in the event of nonperformance by its customers under such commitments or standby letters of credit represents the contractual amount of the financial instruments as indicated in the table below. At December 31, 2014 and 2013, the fair value of guarantees under commercial and standby letters of credit was $1.3 million and $1.1 million, respectively. This fair value amount represents the unamortized fee associated with these guarantees and is included in “Other liabilities” on the consolidated balance sheets of the Company. This fair value will decrease as the existing commercial and standby letters of credit approach their expiration dates.

At December 31, the Company had the following financial instruments outstanding, whose contract amounts represent credit risk:

(Dollars in thousands)	2014		2013
Commitments to grant loans	$	161,350	$	221,627
Unfunded commitments under lines of credit		4,007,954		3,326,448
Commercial and standby letters of credit		134,882		105,026
Reserve for unfunded lending commitments		11,801		11,147

Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to be drawn upon, the total commitment amounts generally represent future cash requirements. The Company evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral, if any, is based on management’s credit evaluation of the counterparty.

Unfunded commitments under commercial lines-of-credit, revolving credit lines and overdraft protection agreements are commitments for possible future extensions of credit to existing customers. Many of these types of commitments do not contain a specified maturity date and may not be drawn upon to the total extent to which the Company is committed. See Note 7 for additional discussion related to the Company’s unfunded lending commitments.

Commercial and standby letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. These guarantees are primarily issued to support public and private borrowing arrangements, including commercial paper issuance, bond financing, and similar transactions. The credit risk involved in issuing letters or credit is essentially the same as that involved in extending loan facilities to customers and as such, are collateralized when necessary, generally in the form of marketable securities and cash equivalents.

Legal proceedings

The nature of the business of the Company’s banking and other subsidiaries ordinarily results in a certain amount of claims, litigation, investigations and legal and administrative cases and proceedings, all of which are considered incidental to the normal conduct of business. Some of these claims are against entities or assets of which the Company is a successor or acquired in business acquisitions, and certain of these claims will be covered by loss sharing agreements with the FDIC. The Company has asserted defenses to these litigations and, with respect to such legal proceedings, intends to continue to defend itself vigorously, litigating or settling cases according to management’s judgment as to what is in the best interest of the Company and its shareholders.

The Company assesses its liabilities and contingencies in connection with outstanding legal proceedings utilizing the latest information available. Where it is probable that the Company will incur a loss and the amount of the loss can be reasonably estimated, the Company records a liability in its consolidated financial statements. These legal reserves may be increased or decreased to reflect any relevant developments on a quarterly basis. Where a loss is not probable or the amount of loss is not estimable, the Company does not accrue legal reserves. While the outcome of legal proceedings is inherently uncertain, based on information currently available, advice of counsel and available insurance coverage, the Company’s management believes that it has established appropriate legal reserves. Any liabilities arising from pending legal proceedings are not expected to have a material adverse effect on the Company’s consolidated financial position, consolidated results of operations or consolidated cash flows. However, in the event of unexpected future developments, it is possible that the ultimate resolution of these matters, if unfavorable, may be material to the Company’s consolidated financial position, consolidated results of operations or consolidated cash flows.

As of the date of this filing, the Company believes the amount of losses associated with legal proceedings that it is reasonably possible to incur above amounts already accrued is immaterial.

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Loss Sharing Agreements and FDIC Loss Share Receivable - Schedule of FDIC Loss Share Receivables (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
FDIC Loss Share Receivable [Line Items]
Balance at beginning of period		$ 162,312
Change due to (reversal of) loan loss provision recorded on FDIC covered loans		(4,260)	(56,085)	84,085
Amortization		(74,617)	(97,849)	(118,100)
Impairment	31,800	5,121	31,813
Balance at end of period		69,627	162,312
FDIC Loss Share Receivables [Member]
FDIC Loss Share Receivable [Line Items]
Balance at beginning of period	423,069	162,312	423,069
Change due to (reversal of) loan loss provision recorded on FDIC covered loans		(4,260)	(56,085)
Amortization		(74,617)	(97,849)
Recoveries payable (submission of reimbursable losses) to the FDIC		3,282	(52,586)
Impairment		(5,121)	(31,813)
Changes due to a change in cash flow assumptions on OREO and other changes		(11,969)	(22,424)
Balance at end of period		$ 69,627	$ 162,312

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Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2014

Fair Value Disclosures [Abstract]

Summary of Difference Between the Aggregate Fair Value and the Aggregate Unpaid Principal Balance for Mortgage Loans Held for Sale

The following table summarizes the difference between the aggregate fair value and the aggregate unpaid principal balance for mortgage loans held for sale measured at fair value:

	December 31, 2014						December 31, 2013
(Dollars in thousands)	Aggregate Fair Value		Aggregate Unpaid Principal		Aggregate Fair Value Less Unpaid Principal		Aggregate Fair Value		Aggregate Unpaid Principal		Aggregate Fair Value Less Unpaid Principal
Mortgage loans held for sale, at fair value	$	139,950	$	134,639	$	5,311	$	97,273	$	96,875	$	398

Financial Asset and Liabilities Measured at Fair Value on Recurring Basis

The Company has segregated all financial assets and liabilities that are measured at fair value on a recurring basis into the most appropriate level within the fair value hierarchy based on the inputs used to estimate the fair value at the measurement date in the tables below.

(Dollars in thousands)	December 31, 2014
	Level 1		Level 2		Level 3		Total
Assets
Available for sale securities	$	—	$	2,158,853	$	—	$	2,158,853
Mortgage loans held for sale		—		139,950		—		139,950
Derivative instruments		—		32,903		—		32,903
Total	$	—	$	2,331,706	$	—	$	2,331,706
Liabilities
Derivative instruments		—		31,354		—		31,354
Total	$	—	$	31,354	$	—	$	31,354
	December 31, 2013
	Level 1		Level 2		Level3		Total
Assets
Available for sale securities	$	15,496	$	1,921,301	$	—	$	1,936,797
Mortgage loans held for sale		—		97,273		—		97,273
Derivative instruments		—		30,076		—		30,076
Total	$	15,496	$	2,048,650	$	—	$	2,064,146
Liabilities
Derivative instruments		—		26,735		—		26,735
Total	$	—	$	26,735	$	—	$	26,735

Gains and Losses Included in Earnings Related to Asset and Liabilities Measured at Fair Value on Recurring Basis

Gains and losses (realized and unrealized) included in earnings (or accumulated other comprehensive income) during 2014 related to assets and liabilities measured at fair value on a recurring basis are reported in non-interest income or other comprehensive income as follows:

(Dollars in thousands)	Noninterest income			Other comprehensive income
Total gains (losses) included in earnings	$	(7,348	)	$	—
Change in unrealized gains (losses) relating to assets still held at December 31, 2014		—			24,016

Financial Asset and Liabilities Measured at Fair Value on Nonrecurring Basis

The Company has segregated all financial assets and liabilities that are measured at fair value on a non-recurring basis into the most appropriate level within the fair value hierarchy based on the inputs used to determine the fair value at the measurement date in the tables below.

(Dollars in thousands)	December 31, 2014
	Level 1		Level 2		Level 3		Total
Assets
Loans	$	—	$	4,864	$	—	$	4,864
OREO		—		1,483		—		1,483
Total	$	—	$	6,347	$	—	$	6,347
(Dollars in thousands)	December 31, 2013
	Level 1		Level 2		Level 3		Total
Assets
Loans	$	—	$	3,070	$	—	$	3,070
Mortgage loans held for sale		—		11,876		—		11,876
OREO		—		14,598		—		14,598
Total	$	—	$	29,544	$	—	$	29,544

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Goodwill and Other Acquired Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2014

Schedule of Definite-Lived Intangible Assets

Definite-lived intangible assets had the following carrying values included in “Other assets” on the Company’s consolidated balance sheets as of December 31:

	2014							2013
(Dollars in thousands)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Core deposit intangibles	$	55,949	$	(36,354	)	$	19,595	$	45,406	$	(30,784	)	$	14,622
Customer relationship intangible asset		1,348		(822	)		526		1,348		(631	)		717
Non-compete agreement		163		(82	)		81		—		—			—
Other intangible assets		205		(46	)		159		—		—			—
Total	$	57,665	$	(37,304	)	$	20,361	$	46,754	$	(31,415	)	$	15,339

Schedule of Amortization Expense of Intangible Assets

The related amortization expense of intangible assets is as follows:

(Dollars in thousands)	Amount
Aggregate amortization expense for the years ended December 31:
2012	$	5,150
2013		4,720
2014		5,807
Estimated amortization expense for the years ended December 31:
2015	$	5,646
2016		5,187
2017		3,586
2018		2,597
2019		1,877
2020 and thereafter		1,468

Schedule of Carrying Amount of Goodwill

Changes to the carrying amount of goodwill by reporting unit for the years ended December 31, 2014 and 2013 are provided in the following table.

(Dollars in thousands)	IBERIABANK		IMC		LTC		Total
Balance, December 31, 2012	$	373,905	$	23,178	$	4,789	$	401,872
Goodwill acquired during the year		—		—		—		—
Balance, December 31, 2013		373,905	$	23,178	$	4,789		401,872
Goodwill acquired during the year		115,278		—		376		115,654
Balance, December 31, 2014	$	489,183	$	23,178	$	5,165	$	517,526

Mortgage Servicing Rights [Member]

Schedule of Definite-Lived Intangible Assets

Mortgage servicing rights had the following carrying values as of December 31:

	2014							2013
	Gross		Accumulated			Net		Gross		Accumulated			Net
(Dollars in thousands)	Carrying Amount		Amortization			Carrying Amount		Carrying Amount		Amortization			Carrying Amount
Mortgage servicing rights	$	4,751	$	(1,253	)	$	3,498	$	2,146	$	(638	)	$	1,508

Schedule of Amortization Expense of Intangible Assets

The related amortization expense of mortgage servicing rights is as follows:

(Dollars in thousands)	Amount
Aggregate amortization expense for the years ended December 31:
2012	$	225
2013		480
2014		759
Estimated amortization expense for the years ended December 31:
2015	$	1,550
2016		697
2017		531
2018		371
2019		230
2020 and thereafter		119

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Fair Value Measurements

12 Months Ended

Dec. 31, 2014

Fair Value Disclosures [Abstract]

Fair Value Measurements

NOTE 23 – FAIR VALUE MEASUREMENTS

Fair value option

The Company may elect the fair value option, which permits the Company to choose to measure eligible financial assets and liabilities at fair value at specified election dates and recognize prospective changes in unrealized gains and losses on items for which the fair value option has been elected in earnings at each reporting date.

Beginning in 2013, the Company elected the fair value option for certain originated residential mortgage loans held for sale, which allows for a more effective offset of the changes in fair values of the loans and the derivative instruments used to hedge them without the burden of complying with the requirements for hedge accounting.

The following table summarizes the difference between the aggregate fair value and the aggregate unpaid principal balance for mortgage loans held for sale measured at fair value:

	December 31, 2014						December 31, 2013
(Dollars in thousands)	Aggregate Fair Value		Aggregate Unpaid Principal		Aggregate Fair Value Less Unpaid Principal		Aggregate Fair Value		Aggregate Unpaid Principal		Aggregate Fair Value Less Unpaid Principal
Mortgage loans held for sale, at fair value	$	139,950	$	134,639	$	5,311	$	97,273	$	96,875	$	398

Interest income on mortgage loans held for sale is recognized based on contractual rates and is reflected in interest income on loans held for sale in the consolidated statements of comprehensive income. Net losses resulting from the change in fair value of these loans that were recorded in mortgage income in the consolidated statement of comprehensive income for the year ended December 31, 2014 totaled $3.5 million, while net gains resulting from the change in fair value of these loans were $0.4 million for year ended December 31, 2013. There were no net gains or losses recorded in mortgage income for the year ended December 31, 2012 resulting from the change in fair value of loans accounted for under the fair value option. The changes in fair value are mostly offset by economic hedging activities, with an immaterial portion of these changes attributable to changes in instrument-specific credit risk.

Items measured at fair value on a recurring basis

The Company has segregated all financial assets and liabilities that are measured at fair value on a recurring basis into the most appropriate level within the fair value hierarchy based on the inputs used to estimate the fair value at the measurement date in the tables below.

(Dollars in thousands)	December 31, 2014
	Level 1		Level 2		Level 3		Total
Assets
Available for sale securities	$	—	$	2,158,853	$	—	$	2,158,853
Mortgage loans held for sale		—		139,950		—		139,950
Derivative instruments		—		32,903		—		32,903
Total	$	—	$	2,331,706	$	—	$	2,331,706
Liabilities
Derivative instruments		—		31,354		—		31,354
Total	$	—	$	31,354	$	—	$	31,354
	December 31, 2013
	Level 1		Level 2		Level3		Total
Assets
Available for sale securities	$	15,496	$	1,921,301	$	—	$	1,936,797
Mortgage loans held for sale		—		97,273		—		97,273
Derivative instruments		—		30,076		—		30,076
Total	$	15,496	$	2,048,650	$	—	$	2,064,146
Liabilities
Derivative instruments		—		26,735		—		26,735
Total	$	—	$	26,735	$	—	$	26,735

During 2014, available for sale securities with a market value of $14.4 million were transferred from the Level 1 to Level 2 fair value category in the table above. The security was issued by Freddie Mac and was included in the Level 1 category at December 31, 2013 based on a recent trade price in the open market.

Gains and losses (realized and unrealized) included in earnings (or accumulated other comprehensive income) during 2014 related to assets and liabilities measured at fair value on a recurring basis are reported in non-interest income or other comprehensive income as follows:

(Dollars in thousands)	Noninterest income			Other comprehensive income
Total gains (losses) included in earnings	$	(7,348	)	$	—
Change in unrealized gains (losses) relating to assets still held at December 31, 2014		—			24,016

Items measured at fair value on a non-recurring basis

The Company has segregated all financial assets and liabilities that are measured at fair value on a non-recurring basis into the most appropriate level within the fair value hierarchy based on the inputs used to determine the fair value at the measurement date in the tables below.

(Dollars in thousands)	December 31, 2014
	Level 1		Level 2		Level 3		Total
Assets
Loans	$	—	$	4,864	$	—	$	4,864
OREO		—		1,483		—		1,483
Total	$	—	$	6,347	$	—	$	6,347
(Dollars in thousands)	December 31, 2013
	Level 1		Level 2		Level 3		Total
Assets
Loans	$	—	$	3,070	$	—	$	3,070
Mortgage loans held for sale		—		11,876		—		11,876
OREO		—		14,598		—		14,598
Total	$	—	$	29,544	$	—	$	29,544

The tables above exclude the initial measurement of assets and liabilities that were acquired as part of the acquisitions completed in 2011 through 2014. These assets and liabilities were recorded at their fair value upon acquisition in accordance with U.S. GAAP and were not re-measured during the periods presented unless specifically required by U.S. GAAP. Acquisition date fair values represent either Level 2 fair value measurements (investment securities, OREO, property, equipment, and debt) or Level 3 fair value measurements (loans, deposits, and core deposit intangible asset).

The Company did not record any liabilities at fair value for which measurement of the fair value was made on a nonrecurring basis during the years ended December 31, 2014, 2013 and 2012.

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Fair Value of Financial Instruments

12 Months Ended

Dec. 31, 2014

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

NOTE 24 – FAIR VALUE OF FINANCIAL INSTRUMENTS

The estimated fair value of a financial instrument is the current amount that would be exchanged between willing parties, other than in a forced liquidation. Fair value is best determined based upon quoted market prices. However, in many instances, there are no quoted market prices for the Company’s various financial instruments. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. Accordingly, the fair value estimates may not be realized in an immediate settlement of the instrument. ASC Topic 825 excludes certain financial instruments and all non-financial instruments from its disclosure requirements. Accordingly, the aggregate fair value amounts presented may not necessarily represent the underlying fair value of the Company.

The following methods and assumptions were used to estimate the fair value of each class of financial instruments for which it is practicable to estimate that value. Refer to Note 1 to these consolidated financial statements for the methods and assumptions used to measure the fair value of investment securities and derivative instruments.

Cash and cash equivalents

The carrying amounts of cash and cash equivalents approximate their fair value.

Loans

The fair values of non-covered mortgage loans are estimated based on present values using entry-value rates (the interest rate that would be charged for a similar loan to a borrower with similar risk at the indicated balance sheet date) at December 31, 2014 and 2013, weighted for varying maturity dates. Other non-covered loans are valued based on present values using entry-value interest rates at December 31, 2014 and 2013 applicable to each category of loans, which would be classified within Level 3 of the hierarchy. Fair values of mortgage loans held for sale are based on commitments on hand from investors or prevailing market prices, a Level 2 measurement. Covered loans are measured using projections of expected cash flows, exclusive of the shared-loss agreements with the FDIC. Fair value of the covered loans included in the table below reflects the current fair value of these loans, which is based on an updated estimate of the projected cash flow as of the dates indicated. The fair value associated with the loans includes estimates related to expected prepayments and the amount and timing of undiscounted expected principal, interest and other cash flows, which also would be classified within Level 3 of the hierarchy.

Accrued Interest Receivable and Accrued Interest Payable

The carrying amount of accrued interest approximates fair value because of the short maturity of these financial instruments.

FDIC Loss Share Receivable

The fair value is determined using projected cash flows from loss sharing agreements based on expected reimbursements for losses at the applicable loss sharing percentages based on the terms of the loss share agreements. Cash flows are discounted to reflect the timing and receipt of the loss sharing reimbursements from the FDIC. The fair value of the Company’s FDIC loss share receivable would be categorized within Level 3 of the hierarchy.

Deposits

The fair values of NOW accounts, money market deposits and savings accounts are the amounts payable on demand at the reporting date. Certificates of deposit were valued using a discounted cash flow model based on the weighted-average rate at December 31, 2014 and 2013 for deposits with similar remaining maturities. The fair value of the Company’s deposits would therefore be categorized within Level 3 of the fair value hierarchy.

Short-term borrowings

The carrying amounts of short-term borrowings maturing within ninety days approximate their fair values.

Long-term debt

The fair values of long-term debt are estimated using discounted cash flow analyses based on the Company’s current incremental borrowing rates for similar types of borrowing arrangements. The fair value of the Company’s long-term debt would therefore be categorized within Level 3 of the fair value hierarchy.

Off-balance sheet items

The Company has outstanding commitments to extend credit and standby letters of credit. These off-balance sheet financial instruments are generally exercisable at the market rate prevailing at the date the underlying transaction will be completed. At December 31, 2014 and 2013, the fair value of guarantees under commercial and standby letters of credit was immaterial.

The estimated fair values and carrying amounts of the Company’s financial instruments are as follows:

	December 31, 2014				December 31, 2013
(Dollars in thousands)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Financial Assets
Cash and cash equivalents	$	548,095	$	548,095	$	391,396	$	391,396
Investment securities		2,275,813		2,278,334		2,090,906		2,089,363
Loans and loans held for sale, net of unearned income		11,581,116		11,605,446		9,620,461		9,724,432
FDIC loss share receivable		69,627		19,606		162,312		21,918
Derivative instruments		32,903		32,903		30,076		30,076
Accrued interest receivable		37,696		37,696		32,143		32,143
Financial Liabilities
Deposits	$	12,520,525	$	12,298,017	$	10,737,000	$	10,226,573
Short-term borrowings		845,742		845,742		680,344		680,344
Long-term debt		403,254		376,139		280,699		235,503
Derivative instruments		31,354		31,354		26,735		26,735
Accrued interest payable		8,258		8,258		6,102		6,102

The fair value estimates presented herein are based upon pertinent information available to management as of December 31, 2014 and 2013. Although management is not aware of any factors that would significantly affect the estimated fair value amounts, such amounts have not been comprehensively revalued for purposes of these financial statements since that date and, therefore, current estimates of fair value may differ significantly from the amounts presented herein.

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Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

NOTE 1 – SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

PRINCIPLES OF CONSOLIDATION

The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries, IBERIABANK, Lenders Title Company (“LTC”), IBERIA Capital Partners L.L.C. (“ICP”), IB Aircraft Holdings, LLC, 1887 Leasing LLC, IBERIA Asset Management, Inc. (“IAM”), and IBERIA CDE, L.L.C. (“CDE”). All significant intercompany balances and transactions have been eliminated in consolidation. All normal, recurring adjustments which, in the opinion of management, are necessary for a fair presentation of the financial statements have been included. Certain amounts reported in prior periods have been reclassified to conform to the current period presentation.

NATURE OF OPERATIONS

The Company offers commercial and retail banking products and services to customers throughout locations in six states through IBERIABANK. The Company also operates mortgage production offices in twelve states through IBERIABANK Mortgage Company (“IMC”), and offers a full line of title insurance and closing services throughout Arkansas and Louisiana through LTC and its subsidiaries. ICP provides equity research, institutional sales and trading, and corporate finance services. 1887 Leasing LLC owns an aircraft used by management of the Company, and IB Aircraft Holdings, LLC owns a fractional share of a separate aircraft also used by management. IAM provides wealth management and trust services for commercial and private banking clients. CDE is engaged in the purchase of tax credits.

USE OF ESTIMATES

The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates. Material estimates that are susceptible to significant change in the near term are the allowance for credit losses, valuation of and accounting for loans covered by loss sharing arrangements with the FDIC and the related loss share receivables, and determination of fair values of assets acquired in acquisitions.

CONCENTRATION OF CREDIT RISKS

Most of the Company’s business activity is with customers located within the States of Louisiana, Florida, Arkansas, Alabama, Texas, and Tennessee. The Company’s lending activity is concentrated in its market areas in those states. The Company has emphasized originations of commercial loans and private banking loans, defined as loans to larger consumer clients. Repayments on loans are expected to come from cash flows of the borrower and/or guarantor. Losses on secured loans are limited by the value of the collateral upon default of the borrowers. The Company does not have any significant concentrations to any one industry or customer.

CASH AND CASH EQUIVALENTS

For purposes of presentation in the consolidated statements of cash flows, cash and cash equivalents are defined as cash, interest-bearing deposits and non-interest-bearing demand deposits at other financial institutions with original maturities less than three months. IBERIABANK may be required to maintain average balances on hand or with the Federal Reserve Bank to meet regulatory reserve and clearing requirements. At December 31, 2014 and 2013, the required reserve balances were $17.4 million and $6.7 million, respectively. IBERIABANK had enough cash deposited with the Federal Reserve at December 31, 2014 and 2013 to cover the required reserve balance.

INVESTMENT SECURITIES

Debt securities that management has the ability and intent to hold to maturity are classified as held to maturity and carried at cost, adjusted for amortization of premiums and accretion of discounts using methods approximating the interest method. Securities not classified as held to maturity or trading, including equity securities with readily determinable fair values, are classified as available for sale and recorded at fair value, with unrealized gains and losses excluded from earnings and reported in other comprehensive income. Declines in the value of individual held to maturity and available for sale securities below their cost that are other than temporary are included in earnings as realized losses. In estimating other than temporary impairment losses, management considers 1) the length of time and the extent to which the fair value has been less than cost, 2) the financial condition and near-term prospects of the issuer, 3) the intent and ability of the Company to retain its investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value, and 4) for debt securities, the recovery of contractual principal and interest. Gains or losses on securities sold are recorded on the trade date, using the specific identification method.

LOANS HELD FOR SALE

Loans held for sale primarily consist of fixed rate single-family residential mortgage loans originated and under contract to be sold in the secondary market. Mortgage loans originated and held for sale are recorded at fair value under the fair value option, unless otherwise noted. Any other loans held for sale are carried at the lower of cost or estimated fair value. For mortgage loans for which the Company has elected the fair value option, gains and losses are included in mortgage income. For any other loans held for sale, net unrealized losses, if any, are recognized through a valuation allowance that is recorded as a charge to income. See Note 23 for further discussion of the determination of fair value for loans held for sale. In most cases, loans in this category are sold within thirty days and are generally sold with the mortgage servicing rights released. Buyers generally have recourse to return a purchased loan to the Company under limited circumstances. Recourse conditions may include early payment default, breach of representations or warranties, and documentation deficiencies. During 2014 and 2013, an insignificant number of loans were returned to the Company. At December 31, 2014, mortgage loans held for sale subject to repurchase were immaterial.

LOANS, EXCLUDING ACQUIRED LOANS (“LEGACY LOANS”)

The Company grants mortgage, commercial and consumer loans to customers. Except for loans acquired, loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are stated at the unpaid principal balances, less the allowance for credit losses and net deferred loan origination fees and unearned discounts.

Interest income on loans is accrued over the term of the loans based on the principal balance outstanding. Loan origination fees, net of certain direct origination costs, are deferred and recognized as an adjustment of the related loan yield, using the effective interest method.

The accrual of interest on loans is discontinued at the time the loan is 90 days delinquent unless the credit is well-secured and in process of collection. Mortgage, credit card and other personal loans are typically charged down to net collateral value, less cost to sell, no later than 180 days past due. Past due status is based on the contractual terms of loans. In all cases, loans are placed on nonaccrual status or charged off at an earlier date if collection of principal or interest is considered doubtful.

The Company’s covered loan portfolio and non-covered loan portfolio, which is delineated between a) legacy loans and b) acquired loans, are disaggregated into portfolio segments for purposes of determining the allowance for credit losses. The Company’s portfolio segments include commercial, mortgage, and consumer. The Company further disaggregates each commercial, mortgage, and consumer portfolio segment into classes for purposes of monitoring and assessing credit quality based on certain risk characteristics. Classes within the commercial loan portfolio segment include commercial real estate construction, commercial real estate – other, and commercial business. Classes within the mortgage portfolio segment include mortgage – prime and mortgage – subprime. Classes within the consumer portfolio segment include home equity, indirect auto, credit card, and consumer – other.

Credit Quality

The Company utilizes an asset risk classification system in accordance with guidelines established by the Federal Reserve Board as part of its efforts to monitor commercial asset quality. “Special mention” loans are defined as loans where known information about possible credit problems of the borrower cause management to have some doubt as to the ability of these borrowers to comply with the present loan repayment terms and which may result in future disclosure of these loans as nonperforming. For assets with identified credit issues, the Company has two primary classifications for problem assets: “substandard” and “doubtful.” Substandard assets have one or more defined weaknesses and are characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. Doubtful assets have the weaknesses of substandard assets with the additional characteristic that the weaknesses make collection or liquidation in full satisfaction of the loan balance outstanding questionable, which makes probability of loss based on currently existing facts, conditions and values higher. Loans classified as “Pass” do not meet the criteria set forth for special mention, substandard, or doubtful classification and are not considered criticized. Asset risk classifications are periodically reviewed and changed if, in the opinion of management, the risk profile of the customer has changed since the last review of the loan relationship.

A loan is considered impaired when, based on current information and events, it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Impairment losses are measured on a loan by loan basis for commercial and certain consumer loans based on either the present value of expected future cash flows discounted at the loan’s effective interest rate, the loan’s observable market price, or the fair value of the collateral if the loan is collateral dependent.

In general, all interest accrued but not collected for loans that are placed on nonaccrual status or charged off is reversed against interest income. The interest on these loans is accounted for on the cash-basis method or cost-recovery method, until the loans qualify for a return to accrual status. Loans are returned to accrual status when all principal and interest amounts contractually due are brought current and future payments are reasonably assured.

Troubled Debt Restructurings

During the course of its lending operations, the Company periodically grants concessions to its customers in an attempt to protect as much of its investment as possible and minimize risk of loss. These concessions may include restructuring the terms of a customer loan to alleviate the burden of the customer’s near-term cash requirements. In order to be considered a troubled debt restructuring (“TDR”), the Company must conclude that the restructuring constitutes a concession and the customer is experiencing financial difficulties. The Company defines a concession to the customer as a modification of existing terms for economic or legal reasons that it would otherwise not consider. The concession is either granted through an agreement with the customer or is imposed by a court or law. Concessions include modifying original loan terms to reduce or defer cash payments required as part of the loan agreement, including but not limited to:

• a reduction of the stated interest rate for the remaining original life of the debt,

• extension of the maturity date or dates at a stated interest rate lower than the current market rate for new debt with similar risk characteristics,

• reduction of the face amount or maturity amount of the debt as stated in the agreement, or

• reduction of accrued interest receivable on the debt.

In its determination of whether the customer is experiencing financial difficulties, the Company considers numerous indicators, including, but not limited to:

• whether the customer is currently in default on its existing loan, or is in an economic position where it is probable the customer will be in default on its loan in the foreseeable future without a modification,

• whether the customer has declared or is in the process of declaring bankruptcy,

• whether there is substantial doubt about the customer’s ability to continue as a going concern,

• whether, based on its projections of the customer’s current capabilities, the Company believes the customer’s future cash flows will be insufficient to service the debt, including interest, in accordance with the contractual terms of the existing agreement for the foreseeable future, and

• whether, without modification, the customer cannot obtain sufficient funds from other sources at an effective interest rate equal to the current market rate for similar debt for a nontroubled debtor.

If the Company concludes that both a concession has been granted and the concession was granted to a customer experiencing financial difficulties, the Company identifies the loan as a TDR. For purposes of the determination of an allowance for credit losses for TDRs, the Company considers a loss probable on the loan, which is reviewed for specific impairment in accordance with the Company’s allowance for loan loss methodology. If it is determined that losses are probable on such TDRs, either because of delinquency or other credit quality indicator, the Company establishes specific reserves for these loans.

ACQUIRED LOANS

The Company accounts for its business combinations under the acquisition method, where all identifiable assets acquired, including loans, are recorded at fair value. Acquired loans are recorded at fair value in accordance with the fair value methodology consistent with the exit price concept. Credit risk assumptions and any resulting credit discounts are included in the determination of fair value. Therefore, an allowance for credit losses is not recorded at the acquisition date. The determination of fair value includes estimates related to discount rates, expected prepayments and the amount and timing of undiscounted expected principal, interest and other cash flows.

Acquired loans are evaluated at acquisition and classified as purchased impaired (“acquired impaired”) or purchased non-impaired (“acquired non-impaired”). Purchased impaired loans reflect credit deterioration since origination to the extent that it is probable at the time of acquisition that the Company will be unable to collect all contractually required payments. At the time of acquisition, purchased impaired loans are accounted for individually or aggregated into loan pools with similar characteristics, which include:

• whether the loan is performing according to contractual terms at the time of acquisition,

• the loan type based on regulatory reporting guidelines, namely whether the loan was a mortgage, consumer, or commercial loan

• the nature of collateral,

• the interest rate type, whether fixed or variable rate, and

• the loan payment type, primarily whether the loan is amortizing or interest-only.

From these pools, the Company uses certain loan information, including outstanding principal balance, estimated expected losses, weighted average maturity, weighted average term to re-price (if a variable rate loan), weighted average margin, and weighted average interest rate to estimate the expected cash flow for each loan pool.

For purchased impaired loans, expected cash flows at the acquisition date in excess of the fair value of loans are recorded as interest income over the life of the loans using a level yield method if the timing and amount of future cash flows is reasonably estimable. For purchased non-impaired loans, the difference between the fair value and unpaid principal balance of the loan at acquisition, referred to as a purchase premium or purchase discount, is amortized or accreted to income over the estimated life of the loans using a method that approximates the interest method.

Subsequent to acquisition, the Company performs cash flow re-estimations at least quarterly for each purchased impaired loan and/or loan pool. Increases in estimated cash flows above those expected at acquisition are recognized on a prospective basis as interest income over the remaining life of the pool. Decreases in expected cash flows subsequent to acquisition result in recognition of a provision for credit loss.

Purchased impaired loans are placed on nonaccrual status when the Company cannot reasonably estimate cash flows on a loan or loan pool.

FDIC LOSS SHARE RECEIVABLE

Because the FDIC reimburses the Company for losses on certain loans acquired in 2009 and 2010, indemnification assets were recorded at fair value as of the acquisition dates. The initial values of the indemnification assets were based on estimated cash flows to be received over the expected life of the acquired assets, not to exceed the term of the indemnification agreements. The loss sharing terms of the Company’s commercial and single family residential indemnification agreements are five years and ten years, respectively, from the date of acquisition. The CSB reimbursable loss period ended as of October 1, 2014 for all covered assets excluding single family residential assets. The CSB reimbursable loss period for single family residential assets will end during the third quarter of 2019. The Century and Orion reimbursable loss periods ended as of January 1, 2015 for all covered assets excluding single family residential assets and will end during the fourth quarter of 2019 for single family residential assets. The Sterling reimbursable loss period ends during the third quarter of 2015 for all covered assets excluding single family residential assets and during the third quarter of 2020 for single family residential assets. Assets are covered through expiration of the loss share term, at which point such assets are considered non-covered.

Because the indemnification assets are measured on the same basis as the indemnified (“covered”) loans, subject to contractual and collectability limitations, the indemnification assets are impacted by changes in expected cash flows on covered assets. Increases in credit losses expected to occur within the loss share term are recorded as current period increases to the allowance for credit losses and increase the amount collectible from the FDIC by the applicable loss share percentage. Decreases in credit losses expected to occur within the loss share term reduce the amount collectible from the FDIC and increase the amount collectible from customers in the form of prospective accretion on loans. Increases in the portion of indemnification asset collectible from customers are amortized to income. Periodic amortization represents the amount that is expected to result in symmetrical recognition of pool-level accretion and amortization over the shorter of 1) the life of the loan or 2) the life of the shared loss agreement.

The Company assesses the indemnification assets for collectibility at the acquisition level based on three sources: 1) the FDIC, 2) OREO transactions, and 3) customers. Amounts collectible from the FDIC through loss reimbursements are comprised of losses currently expected within the loss share term. A current period impairment would be recorded to the extent that events or circumstances indicate that losses previously expected to occur within the loss share term are expected to occur subsequent to loss share termination. Amounts collectible through expected gains on the sale of OREO are written-up or impaired each period based on the best available information.

Loss assumptions used to measure the basis of the indemnified loans are consistent with the loss assumptions used to measure the indemnification assets.

The indemnification asset is reduced when cash is received from the FDIC.

ALLOWANCE FOR CREDIT LOSSES

The manner in which the allowance for credit losses is determined is based on the accounting method applied to the underlying loans. The Company delineates between loans accounted for under the contractual yield method, primarily legacy loans, and loans accounted for as purchased impaired loans, primarily acquired loans.

Legacy Loans

Legacy loans represent loans accounted for under the contractual yield method. The Company’s legacy loans include loans originated by the Company and acquired loans that are not accounted for as acquired credit impaired loans.

The Legacy ACL represents management’s best estimate of probable credit losses inherent at the balance sheet date. Determination of the Legacy ACL involves a high degree of complexity and requires significant judgment. Several factors are taken into consideration in the determination of the overall Legacy ACL, including a qualitative component. These factors include, but are not limited to, the overall risk profiles of the loan portfolios, net charge-off experience, the extent of impaired loans, the level of nonaccrual loans, the level of 90 days past due loans and the overall percentage level of the allowance. The Company also considers overall asset quality trends, changes in lending and risk management practices and procedures, trends in the nature and volume of the loan portfolio, including the existence and effect of any portfolio concentrations, changes in experience and depth of lending staff, the Company’s legal, regulatory and competitive environment, national and regional economic trends, and data availability and applicability that might impact the portfolio. See the “Application of Critical Accounting Policies and Estimates” section for more information.

During 2014, the Company did not substantively change any material aspect of its overall approach in the determination of the allowance for credit losses and there have been no material changes in assumptions or estimation techniques as compared to December 31, 2013. However, during the third quarter of 2013, the Company modified its methodology for estimating its allowance for credit losses on its non-covered, non-acquired loan portfolio to incorporate practices, processes, and methodologies consistent with the guidance provided in the FRB’s inter-agency policy statement 2006 SR 06-17. The methodology was modified to segregate the reserve for unfunded lending commitments (“RULC”), previously included in the Company’s allowance for loan losses, into a separate liability on the Company’s consolidated balance sheet, and to enhance the previous methodology around loss migration.

Certain inherent, but unconfirmed losses are probable within the loan portfolio. The Company’s current methodology for determining the level of losses is based on historical loss rates, current credit grades, specific allocation and other qualitative adjustments. In a stable or deteriorating credit environment, heavy reliance on historical loss rates and the credit grade rating process results in model-derived required reserves that tend to slightly lag behind portfolio deterioration. Similar lags can occur in an improving credit environment whereby required reserves can lag slightly behind portfolio improvement. Given these model limitations, qualitative adjustment factors may be incremental or decremental to the quantitative model results.

Acquired Impaired Loans

Acquired impaired loans, which include covered loans and certain non-covered loans, represent loans acquired by the Company that are accounted for in accordance with ASC Topic 310-30.

Loans acquired in business combinations were recorded at their acquisition date fair values, which were based on expected cash flows and included estimates of expected future credit losses. Under current accounting principles, information regarding the Company’s estimates of loan fair values may be adjusted for a period of up to one year as the Company continues to refine its estimate of expected future cash flows in the acquired portfolio. If the Company discovers that it has materially underestimated the credit losses expected in the loan portfolio based on information available at the acquisition date within the purchase accounting period, it will retroactively reduce or eliminate the gain and/or increase goodwill recorded on the acquisition. If the Company determines that losses arose after the acquisition date, the additional losses will be reflected as a provision for credit losses.

At December 31, 2014, the Company had an allowance for credit losses of $45 million to reserve for expected losses currently in the covered loan portfolio and $9 million to reserve for probable losses currently in the acquired impaired loan portfolio that have arisen after the losses were estimated at the respective acquisition dates. Based on facts and circumstances available, management of the Company believes that the acquired impaired allowance for credit losses was appropriate at December 31, 2014. However, future adjustments to the allowance may be necessary, and the results of operations could be adversely affected, if circumstances differ substantially from the assumptions used by management in determining the allowance for credit losses.

OFF-BALANCE SHEET CREDIT-RELATED FINANCIAL INSTRUMENTS

The Company accounts for its guarantees in accordance with the provisions of ASC Topic 460. In the ordinary course of business, the Company has entered into commitments to extend credit, including commitments under commercial construction arrangements, commercial and home equity lines of credit, credit card arrangements, commercial letters of credit and standby letters of credit. Such financial instruments are recorded when they are funded.

DERIVATIVE FINANCIAL INSTRUMENTS

The Company enters into derivative financial instruments to manage interest rate risk, asset sensitivity, and other exposures such as liquidity and credit risk. The primary types of derivatives used by the Company include interest rate swap agreements, interest rate lock commitments, forward sales commitments, and written and purchased options. All derivative instruments are recognized on the consolidated balance sheets as other assets or other liabilities at fair value, as required by ASC Topic 815.

As part of its activities to manage interest rate risk (i.e., the exposure to the variability of future cash flows or other forecasted transactions due to fluctuating market rates), the Company enters into interest rate contracts, which typically include interest rate swap agreements. The Company primarily utilizes these instruments, which the Company designates as cash flow hedges, to convert a portion of its variable-rate loans or debt to a fixed rate. In addition to using interest rate swap agreements to manage interest rate risk, the Company also enters into derivative instruments to help its commercial customers manage their exposure to interest rate fluctuations or other customers to facilitate business transactions. To mitigate the market risk associated with these customer contracts, the Company enters into offsetting derivative contract positions. The Company manages its credit risk, or potential risk of default by its commercial customers, through credit limit approval and monitoring procedures.

Interest rate swap agreements

Interest rate swaps are agreements to exchange interest payments based upon notional amounts. The exchange of payments typically involves paying a fixed rate and receiving a variable rate or vice versa.

Interest rate lock commitments

The Company enters into commitments to originate mortgage loans intended for sale whereby the interest rate on the prospective loan is determined prior to funding (“rate lock”). A rate lock is given to a borrower, subject to conditional performance obligations, for a specified period of time that typically does not exceed 60 days. Rate lock commitments on mortgage loans that are intended to be sold are considered to be derivatives. Accordingly, such commitments are recorded at fair value as derivative assets or liabilities, with changes in fair value recorded in mortgage income on the consolidated statements of comprehensive income.

Forward sales commitments

The Company uses forward sales commitments to protect the value of its rate locks and mortgage loans held for sale from changes in interest rates and pricing between the origination of the rate lock and sale of these loans, as changes in interest rates have the potential to cause a decline in value of rate locks and mortgage loans included in the held for sale portfolio. These commitments are considered to be derivatives and are recorded at fair value as derivative assets or liabilities, with changes in fair value recorded in mortgage income on the consolidated statements of comprehensive income.

Equity-indexed certificates of deposit

IBERIABANK offers its customers a certificate of deposit that provides the purchaser a guaranteed return of principal at maturity plus potential return, which allows IBERIABANK to identify a known cost of funds. The rate of return is based on the performance of a basket of publically traded stocks that represent a variety of industry segments. Because it is based on an equity index, the rate of return represents an embedded derivative that is not clearly and closely related to the host instrument and is to be accounted for separately. Accordingly, the certificate of deposit is separated into two components: a zero coupon certificate of deposit (the host instrument) and a written option purchased by the depositor (an embedded derivative). The discount on the zero coupon deposit is amortized over the life of the deposit, and the written option is carried at fair value on the Company’s consolidated balance sheets, with changes in fair value recorded through earnings. IBERIABANK offsets the risks of the written option by purchasing an option with terms that mirror the written option and that is also carried at fair value on the Company’s consolidated balance sheets.

Derivatives Designated in Hedging Relationships

For cash flow hedges, the effective portion of the gain or loss related to the derivative instrument is initially reported as a component of other comprehensive income and subsequently reclassified into earnings when the forecasted transaction affects earnings or when the hedge is terminated. The ineffective portion of the gain or loss is reported in earnings immediately. In applying hedge accounting for derivatives, the Company establishes and documents a method for assessing the effectiveness of the hedging derivative and a measurement approach for determining the ineffective aspect of the hedge upon the inception of the hedge.

At December 31, 2014, there were no hedging relationships designated for hedge accounting purposes.

Derivatives Not Designated in Hedging Relationships

For derivative instruments that are not designated as hedging instruments, changes in the fair value of the derivatives are recognized in earnings immediately.

PREMISES AND EQUIPMENT

Land is carried at cost. Buildings, furniture, fixtures, and equipment are carried at cost, less accumulated depreciation computed on a straight line basis over the estimated useful lives of 10 to 40 years for buildings and 3 to 15 years for furniture, fixtures and equipment. Capitalized leasehold improvements are amortized over the length of the initial lease agreement or their useful life, whichever is shorter.

OTHER REAL ESTATE

Other real estate includes all real estate, other than bank premises used in bank operations, owned or controlled by the Company, including real estate acquired in settlement of loans. Properties are recorded at the balance of the loan (which is the pro-rata carrying value of loans accounted for in accordance with ASC Topic 310-30) or at estimated fair value less estimated selling costs, whichever is less, at the date acquired. Subsequent to foreclosure, management periodically performs valuations and the assets are carried at the lower of cost or fair value less estimated selling costs. Revenue and expenses from operations, gain or loss on sale and changes in the valuation allowance are included in net expenses from foreclosed assets.

GOODWILL AND OTHER INTANGIBLE ASSETS

Goodwill

Goodwill is accounted for in accordance with ASC Topic 350, and accordingly is not amortized but is evaluated at least annually for impairment. As part of its testing, the Company first assesses qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If the results of the qualitative assessment indicate impairment, the Company determines the fair value of a reporting unit relative to its carrying amount to determine whether quantitative indicators of impairment are present. When the Company determines that the fair value of the reporting unit is below its carrying amount, the Company determines the fair value of the reporting unit’s assets and liabilities, considering deferred taxes, and then measures impairment loss by comparing the implied fair value of goodwill with the carrying amount of that goodwill.

Title Plant

The Company records its title plant assets in accordance with ASC Topic 950. Under ASC Topic 950, costs incurred to construct a title plant, including the costs incurred to obtain, organize, and summarize historical information, are capitalized until the title plant can be used to perform title searches. Purchased title plant, including a purchased undivided interest in title plant, is recorded at cost at the date of acquisition. For title plant acquired separately or as part of a company acquisition, cost is measured as the fair value of the consideration given. Capitalized costs of title plant are not depreciated or charged to income unless circumstances indicate that the carrying amount of the title plant has been impaired. Impairment identifiers include a change in legal requirements or statutory practices, identification of obsolescence, and abandonment of the title plant, among other identifiers.

Intangible assets subject to amortization

The Company’s acquired intangible assets that are subject to amortization include core deposit intangibles, amortized on a straight line or accelerated basis, and a customer relationship intangible asset, amortized on an accelerated basis over average lives not to exceed 10 years.

TRANSFERS OF FINANCIAL ASSETS

Transfers of financial assets are accounted for as sales when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when 1) the assets have been isolated from the Company, 2) the transferee obtains the right, free of conditions that constrain it from taking advantage of that right, to pledge or exchange the transferred assets, and 3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity. Should the transfer not meet these three criteria, the transaction is treated as a secured financing.

INCOME TAXES

The Company and all subsidiaries file a consolidated federal income tax return on a calendar year basis. The Company files income tax returns in the U.S. federal jurisdiction and various state jurisdictions through IBERIABANK, IMC, LTC and their subsidiaries. In lieu of Louisiana state income tax, IBERIABANK is subject to the Louisiana bank shares tax, a portion of which is included in both non-interest expense and income tax expense in the Company’s consolidated statements of comprehensive income. With few exceptions, the Company is no longer subject to U.S. federal, state or local income tax examinations for years before 2011.

Deferred income tax assets and liabilities are determined using the liability (or balance sheet) method. Under this method, the net deferred tax asset or liability is determined based on the tax effects of the temporary differences between the book and tax bases of the various balance sheet assets and liabilities and gives current recognition to changes in tax rates and laws. The measurement of deferred tax assets is reduced, if necessary, by the amount of any tax benefits that, based on available evidence, are not expected to be realized.

The Company recognizes interest and penalties accrued related to unrecognized tax benefits, if applicable, in non-interest expense.

STOCK COMPENSATION PLANS

The Company issues stock options and restricted stock under various plans to directors, officers and other key employees. The Company accounts for its stock compensation plans in accordance with ASC Topics 718 and 505. Under those provisions, the Company has adopted a fair value based method of accounting for employee stock compensation plans, whereby compensation cost is measured at the grant date based on the value of the award and is recognized on a straight-line basis over the service period, which is usually the vesting period, taking into account retirement eligibility. For service awards with graded vesting, the Company recognizes compensation cost on a straight-line basis. As a result, compensation expense relating to stock options and restricted stock is reflected in net income as part of “Salaries and employee benefits” on the consolidated statements of comprehensive income for employees and “Professional services” for non-employee directors. The Company’s practice has been to grant options at no less than the fair market value of the stock at the grant date.

EARNINGS PER COMMON SHARE

Basic earnings per share represents income available to common shareholders divided by the weighted average number of common shares outstanding during the period. Diluted earnings per share reflect additional common shares that would have been outstanding if dilutive potential common shares, in the form of stock options, had been issued, as well as any adjustment to income that would result from the assumed issuance. Participating common shares issued by the Company relate to unvested outstanding restricted stock awards, the earnings allocated to which are used in determining income available to common shareholders under the two-class method. The two-class method allocates earnings for the period between common shareholders and other participating securities holders. The participating awards receiving dividends will be allocated the same amount of income as if they were outstanding shares.

TREASURY STOCK

The purchase of the Company’s common stock is recorded at cost. At the date of retirement or subsequent reissuance, treasury stock is reduced by the cost of such stock with differences recorded in additional paid-in capital or retained earnings, as applicable.

As of December 31, 2014, 1,809,497 shares of the Company’s common stock were classified as treasury stock in the consolidated financial statements. Effective January 1, 2015, companies incorporated in Louisiana became subject to the Louisiana Business Corporation Act (which replaced the Louisiana Business Corporation Law). Provisions of the Louisiana Business Corporation Act eliminate the concept of treasury stock and provide that shares reacquired by a company are to be treated as authorized but unissued shares. As a result of this change in law, for the consolidated financial statements beginning with the quarterly period ended March 31, 2015, the Company will begin to classify shares previously classified as treasury stock as a reduction to issued shares of common stock, and, accordingly, will adjust the stated value of common stock and paid in capital.

COMPREHENSIVE INCOME

Accounting principles generally require that recognized revenue, expenses, gains and losses be included in net income. Although certain changes in assets and liabilities, such as unrealized gains and losses on available for sale securities and cash flow hedges, are reported as a separate component of the shareholders’ equity section of the consolidated balance sheets, such items, along with net income, are components of comprehensive income.

FAIR VALUE MEASUREMENTS

The Company estimates fair value based on the assumptions market participants would use when selling an asset or transferring a liability and characterizes such measurements within the fair value hierarchy based on the inputs used to develop those assumptions and measure fair value. The hierarchy requires the Company to maximize the use of observable inputs and minimize the use of unobservable inputs. The three levels of inputs used to measure fair value are as follows:

• Level 1 - Quoted prices in active markets for identical assets or liabilities.

• Level 2 - Observable inputs other than quoted prices included in Level 1, such as quoted prices for similar assets and liabilities in active markets; quoted prices for identical or similar assets and liabilities in markets that are not active; or other inputs that are observable or can be corroborated by observable market data.

• Level 3 - Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. This includes certain pricing models, discounted cash flow methodologies and similar techniques that use significant unobservable inputs.

A description of the valuation methodologies used for instruments measured at fair value follows, as well as the classification of such instruments within the valuation hierarchy.

Investment securities

Securities are classified within Level 1 where quoted market prices are available in an active market. Inputs include securities that have quoted prices in active markets for identical assets. If quoted market prices are unavailable, fair value is estimated using quoted prices of securities with similar characteristics, at which point the securities would be classified within Level 2 of the hierarchy.

Mortgage loans held for sale

Mortgage loans originated and held for sale are recorded at fair value under the fair value option, unless otherwise noted. When determining the fair value of loans held for sale, the Company obtains quotes or bids on these loans directly from the purchasing financial institutions (Level 2).

Impaired loans

Loans are measured for impairment using the methods permitted by ASC Topic 310. Fair value measurements are used in determining impairment using either the loan’s observable market price (Level 1), if available, or the fair value of the collateral if the loan is collateral dependent (Level 2). Measuring the impairment of loans using the present value of expected future cash flows, discounted at the loan’s effective interest rate, is not considered a fair value measurement. Fair value of the collateral is determined by appraisals or independent valuation.

Other real estate owned (OREO)

Fair values of OREO at December 31, 2014 are determined by sales agreement or appraisal, and costs to sell are based on estimation per the terms and conditions of the sales agreement or amounts commonly used in real estate transactions. Inputs include appraisal values on the properties or recent sales activity for similar assets in the property’s market, and thus OREO measured at fair value would be classified within Level 2 of the hierarchy. The Company included property write-downs of $3.8 million, $4.8 million, and $6.4 million in earnings as part of “Costs of OREO property, net” on the consolidated statements of comprehensive income for the years ended December 31, 2014, 2013, and 2012, respectively.

Derivative financial instruments

The Company enters into commitments to originate loans whereby the interest rate on the prospective loan is determined prior to funding. Rate locks on mortgage loans that are intended to be sold are considered to be derivatives. The Company offers its customers a certificate of deposit that provides the purchaser a guaranteed return of principal at maturity plus potential return, which allows the Company to identify a known cost of funds. The rate of return is based on an equity index, and as such represents an embedded derivative. Fair value of interest rate swaps, interest rate locks, forward sales commitments, and equity-linked written and purchased options are estimated using prices of financial instruments with similar characteristics, and thus are classified within Level 2 of the fair value hierarchy.

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Quarterly Results of Operations and Selected Cash Flow Data (Unaudited) - Schedule of Quarterly Results of Operations (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Total interest income	$ 137,276	$ 133,793	$ 119,514	$ 114,232	$ 114,092	$ 108,512	$ 108,177	$ 106,416	$ 504,815	$ 437,197	$ 445,200
Total interest expense	12,596	12,042	10,241	9,824	10,654	11,060	11,695	13,545	44,704	46,953	63,450
Net interest income	124,680	121,751	109,273	104,408	103,438	97,452	96,482	92,871	460,111	390,244	381,750
(Reversal of) Provision for loan losses	6,495	5,714	4,748	2,103	4,700	2,014	1,807	(3,377)	19,060	5,145	20,671
Net interest income after (reversal of) provision for loan losses	118,185	116,037	104,525	102,305	98,738	95,438	94,675	96,248	441,051	385,099	361,079
Gain (loss) on sale of investments, net	164	582	8	19	19	13	(57)	2,359	771	2,277	3,739
Other noninterest income	46,908	46,530	43,753	35,662	38,696	43,250	42,546	42,132
Noninterest expense	119,382	120,360	127,309	107,428	102,674	108,152	117,361	144,898	474,479	473,085	432,185
Income (loss) before income taxes	45,875	42,789	20,977	30,558	34,779	30,549	19,803	(4,159)	140,200	80,972	104,891
Income tax expense (benefit)	9,939	11,897	4,750	8,163	9,175	7,357	4,213	(4,876)	34,750	15,869	28,496
Net income	35,936	30,892	16,227	22,395	25,604	23,192	15,590	717	105,450	65,103	76,395
Preferred stock dividends	0	0	0	0	0	0	0	0
Income available to common shareholders	35,936	30,892	16,227	22,395	25,604	23,192	15,590	717	105,450	65,103	76,395
Earnings Allocated to Unvested Restricted Stock	(530)	(465)	(258)	(405)	(456)	(425)	(293)	(20)	(1,685)	(1,209)	(1,437)
Earnings available to common shareholders - Diluted	$ 35,406	$ 30,427	$ 15,969	$ 21,990	$ 25,148	$ 22,767	$ 15,297	$ 697	$ 103,765	$ 63,894	$ 74,958
Earnings per share - Basic	$ 1.08	$ 0.93	$ 0.53	$ 0.75	$ 0.86	$ 0.78	$ 0.53	$ 0.02	$ 3.32	$ 2.20	$ 2.59
Earnings per share - Diluted	$ 1.07	$ 0.92	$ 0.53	$ 0.75	$ 0.86	$ 0.78	$ 0.53	$ 0.02	$ 3.30	$ 2.20	$ 2.59
Cash dividends declared per common share	$ 0.34	$ 0.34	$ 0.34	$ 0.34	$ 0.34	$ 0.34	$ 0.34	$ 0.34	$ 1.36	$ 1.36	$ 1.36

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Restrictions on Dividends, Loans and Advances

12 Months Ended

Dec. 31, 2014

Equity [Abstract]

Restrictions on Dividends, Loans and Advances

NOTE 25 – RESTRICTIONS ON DIVIDENDS, LOANS AND ADVANCES

IBERIABANK is restricted under applicable laws in the payment of dividends to an amount equal to current year earnings plus undistributed earnings for the immediately preceding year, unless prior permission is received from the Commissioner of Financial Institutions for the State of Louisiana. Dividends payable by IBERIABANK in 2015 without permission will be limited to 2015 earnings plus an additional $108.4 million.

Funds available for loans or advances by IBERIABANK to the Company amounted to $140.8 million. In addition, any dividends that may be paid by IBERIABANK to the Company would be prohibited if the effect thereof would cause IBERIABANK’s capital to be reduced below applicable minimum capital requirements.

During any deferral period under the Company’s junior subordinated debt, the Company would be prohibited from declaring and paying dividends to common shareholders. See Note 16 to the consolidated financial statements for additional information.

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Condensed Parent Company Only Financial Statements - Condensed Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Parent Company Only Financial Information [Line Items]
Cash in bank	$ 251,994	$ 238,672
Other assets	589,400	554,167
Total Assets	15,758,605	13,365,550	13,129,678
Liabilities	13,905,756	11,834,571
Shareholders' Equity	1,852,849	1,530,979	1,529,868	1,482,661
Total liabilities and shareholders' equity	15,758,605	13,365,550
IBERIABANK Corporation [Member]
Parent Company Only Financial Information [Line Items]
Cash in bank	36,064	98,108
Investment in subsidiaries	1,842,120	1,487,337
Other assets	119,494	80,528
Total Assets	1,997,678	1,665,973
Liabilities	144,829	134,994
Shareholders' Equity	1,852,849	1,530,979
Total liabilities and shareholders' equity	$ 1,997,678	$ 1,665,973

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Loans - Schedule of Non-Covered and Covered Loans (Parenthetical) (Detail) (Covered Loans [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loan lost share coverage	$ 174.7

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Other Real Estate Owned - Schedule of Other Real Estate Owned Segregated into Non-Covered and Covered Properties (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014
Statement of Financial Position [Abstract]
Covered other real estate owned	$ 9.6

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Loans (Tables)

12 Months Ended

Dec. 31, 2014

Schedule of Non-Covered and Covered Loans

Loans consist of the following, segregated into non-covered and covered loans, for the periods indicated:

	December 31, 2014
	Non-covered loans
(Dollars in thousands)	Legacy Loans		Acquired Loans		Covered Loans(1)		Total
Commercial loans:
Real estate	$	3,718,058	$	497,949	$	189,126	$	4,405,133
Business		3,284,140		93,549		31,260		3,408,949
		7,002,198		591,498		220,386		7,814,082
Residential mortgage loans:
Residential 1-4 family		495,638		424,579		128,024		1,048,241
Construction / Owner Occupied		32,056		—		—		32,056
		527,694		424,579		128,024		1,080,297
Consumer and other loans:
Home equity		1,290,976		217,699		92,430		1,601,105
Indirect automobile		396,766		392		—		397,158
Other		451,080		93,618		3,704		548,402
		2,138,822		311,709		96,134		2,546,665
Total	$	9,668,714	$	1,327,786	$	444,544	$	11,441,044
	December 31, 2013
	Non-covered loans
(Dollars in thousands)	Legacy Loans		Acquired Loans		Covered Loans		Total
Commercial loans:
Real estate	$	3,134,904	$	345,069	$	387,332	$	3,867,305
Business		2,906,051		53,037		37,025		2,996,113
		6,040,955		398,106		424,357		6,863,418
Residential mortgage loans:
Residential 1-4 family		404,922		18,135		154,025		577,082
Construction / Owner Occupied		9,450		—		—		9,450
		414,372		18,135		154,025		586,532
Consumer and other loans:
Home equity		1,101,227		53,443		137,122		1,291,792
Indirect automobile		373,383		1,853		—		375,236
Other		358,384		12,368		4,289		375,041
		1,832,994		67,664		141,411		2,042,069
Total	$	8,288,321	$	483,905	$	719,793	$	9,492,019

(1) Included as covered loans at December 31, 2014 is $174.7 million of assets whose reimbursable loss periods ended as of January 1, 2015.

Schedule of Legacy Loans on Nonaccrual Status

The following table provides the recorded investment of legacy loans on non-accrual status at December 31:

(Dollars in thousands)	2014		2013
Commercial real estate - Construction	$	69	$	1,803
Commercial real estate - Other		6,883		7,648
Commercial business		3,028		15,020
Residential mortgage - Prime		10,767		8,611
Residential mortgage - Subprime		3,595		1,626
Consumer - Home equity		7,404		6,808
Consumer - Indirect automobile		1,419		1,275
Consumer - Credit card		1,032		411
Consumer - Other		773		485
Total	$	34,970	$	43,687

Schedule of Carrying Amount of Acquired Covered Loans

The carrying amount of the acquired covered loans at December 31, 2014 and 2013 consisted of loans determined to be impaired at the acquisition date, which are accounted for in accordance with ASC Topic 310-30, and loans that were considered to be performing at the acquisition date, accounted for by analogy to ASC Topic 310-30, as detailed in the following tables.

	December 31, 2014
(Dollars in thousands)	Acquired Impaired Loans		Acquired Performing Loans		Total Covered Loans
Commercial loans:
Real estate	$	1,253	$	187,873	$	189,126
Business		—		31,260		31,260
		1,253		219,133		220,386
Residential mortgage loans:
Residential 1-4 family		22,918		105,106		128,024
Construction / Owner Occupied		—		—		—
		22,918		105,106		128,024
Consumer and other loans:
Home equity		12,872		79,558		92,430
Indirect automobile		—		—		—
Other		489		3,215		3,704
		13,361		82,773		96,134
Total	$	37,532	$	407,012	$	444,544
	December 31, 2013
(Dollars in thousands)	Acquired Impaired Loans		Acquired Performing Loans		Total Covered Loans
Commercial loans:
Real estate	$	14,904	$	372,428	$	387,332
Business		—		37,025		37,025
		14,904		409,453		424,357
Residential mortgage loans:
Residential 1-4 family		28,223		125,802		154,025
Construction / Owner Occupied		—		—		—
		28,223		125,802		154,025
Consumer and other loans:
Home equity		21,768		115,354		137,122
Indirect automobile		—		—		—
Other		1,182		3,107		4,289
		22,950		118,461		141,411
Total	$	66,077	$	653,716	$	719,793

Schedule of Carrying Amount of Loans Acquired

As discussed in Note 4, during 2014, the Company acquired loans of $86.5 million from Trust One-Memphis, $700.5 million from Teche, and $299.3 million from First Private. Of the total $1.1 billion of loans acquired in 2014, $1.0 billion were determined to have no evidence of deteriorated credit quality and are accounted for under ASC Topics 310-10 and 310-20. The remaining $66.7 million were determined to have deteriorated credit quality under ASC Topic 310-30. The tables below show the balances acquired during 2014 for these two subsections of the portfolio as of the acquisition date.

(Dollars in thousands)
Contractually required principal and interest at acquisition	$	1,224,635
Expected losses and foregone interest		(20,790	)
Cash flows expected to be collected at acquisition		1,203,845
Fair value of acquired loans at acquisition	$	1,014,903

(Dollars in thousands)	Acquired Impaired Loans			Acquired Performing Impaired Loans			Total Acquired Loans
Contractually required principal and interest at acquisition	$	71,871		$	15,130		$	87,001
Nonaccretable difference (expected losses and foregone interest)		(6,117	)		(361	)		(6,478	)
Cash flows expected to be collected at acquisition		65,754			14,769			80,523
Accretable yield		(12,312	)		(1,536	)		(13,848	)
Basis in acquired loans at acquisition	$	53,442		$	13,233		$	66,675

Summary of Changes in Accretable Yields of Acquired Loans

The following is a summary of changes in the accretable difference for loans accounted for under ASC 310-30 of acquired impaired loans during the years ended December 31:

	2014
(Dollars in thousands)	Acquired Impaired Loans			Acquired Performing Impaired Loans			Total Acquired Loans
Balance at beginning of period	$	78,349		$	276,543		$	354,892
Acquisition		12,312			1,536			13,848
Transfers from nonaccretable difference to accretable yield		4,405			21,439			25,844
Accretion		(15,095	)		(88,138	)		(103,233	)
Changes in expected cash flows not affecting nonaccretable differences (1)		(5,722	)		2,022			(3,700	)
Balance at end of period	$	74,249		$	213,402		$	287,651
	2013
	Acquired Impaired Loans			Acquired Performing Impaired Loans			Total Acquired Loans
Balance at beginning of period	$	76,623		$	279,770		$	356,393
Transfers from nonaccretable difference to accretable yield		7,849			42,894			50,743
Accretion		(16,273	)		(163,183	)		(179,456	)
Changes in expected cash flows not affecting nonaccretable differences (1)		10,150			117,062			127,212
Balance at end of period	$	78,349		$	276,543		$	354,892
	2012
	Acquired Impaired Loans			Acquired Performing Impaired Loans			Total Acquired Loans
Balance at beginning of period	$	83,834		$	386,977		$	470,811
Acquisition		1,190			22,899			24,089
Transfers from nonaccretable difference to accretable yield		(11,816	)		(47,842	)		(59,658	)
Accretion		(30,417	)		(218,892	)		(249,309	)
Changes in expected cash flows not affecting nonaccretable differences (1)		33,832			136,628			170,460
Balance at end of period	$	76,623		$	279,770		$	356,393

⁽¹⁾ Includes changes in cash flows expected to be collected due to the impact of changes in actual or expected timing of liquidation events, modifications, changes in interest rates and changes in prepayment assumptions.

Schedule of Carrying Amount of Loans Acquired under ASC Topic 310-10

changes in interest rates and changes in prepayment assumptions.

Schedule of Troubled Debt Restructurings

	December 31, 2014								December 31, 2013
	Accruing Loans								Accruing Loans
(Dollars in thousands)	Current		Past Due > 30 days		Nonaccrual TDRs		Total TDRs		Current		Past Due > 30 days		Nonaccrual TDRs		Total TDRs
Commercial real estate - Construction	$	—	$	—	$	—	$	—	$	—		—		—		—
Commercial real estate - Other		355		—		—		355		400		—		4,452		4,852
Commercial business		1,075		—		1,971		3,046		976		—		13,791		14,767
Residential mortgage - Prime		—		—		—		—		—		—		—		—
Residential mortgage - Subprime		—		—		—		—		—		—		—		—
Consumer - Home equity		—		—		238		238		—		—		258		258
Consumer - Indirect automobile		—		—		—		—		—		—		—		—
Consumer - Credit card		—		—		—		—		—		—		—		—
Consumer - Other		—		—		—		—		—		—		—		—
Total	$	1,430	$	—	$	2,209	$	3,639	$	1,376	$	—	$	18,501	$	19,877

Schedule of Modified TDRs

The following table provides information on how the TDRs were modified during years ended December 31:

(Dollars in thousands)	2014		2013
Extended maturities	$	—	$	—
Interest rate adjustment		—		—
Maturity and interest rate adjustment		—		—
Movement to or extension of interest-rate only payments		—		—
Forbearance		—		12,975
Other concession(s) (1)		—		1,587
Total	$	—	$	14,562

⁽¹⁾ Other concessions include concessions or a combination of concessions that do not consist of maturity extensions, interest rate adjustments, forbearance or covenant modifications.

TDRs [Member]

Schedule of Subsequently Defaulted TDRs

Information about the Company’s TDRs occurring in these periods is presented in the following table.

	December 31, 2014						December 31, 2013
(In thousands, except number of loans)	Number of Loans		Pre-modification Outstanding Recorded Investment		Post-modification Outstanding Recorded Investment (1)		Number of Loans		Pre-modification Outstanding Recorded Investment		Post-modification Outstanding Recorded Investment (1)
Commercial business		—		—		—		9		14,835		12,429
Total		—	$	—	$	—		9	$	14,835	$	12,429

⁽¹⁾ Recorded investment includes any allowance for credit losses recorded on the TDRs at the dates indicated.

Information detailing non-covered TDRs that subsequently defaulted during the previous twelve months is presented in the following table. The Company has defined a default as any loan with a loan payment that is currently past due greater than 30 days, or was past due greater than 30 days at any point during the previous twelve months, or since the date of modification, whichever is shorter.

	December 31, 2014				December 31, 2013
(In thousands, except number of loans)	Number of Loans		Recorded Investment		Number of Loans		Recorded Investment
Commercial real estate		30	$	—		35	$	4,452
Commercial business		9		1,600		17		12,808
Residential mortgage - Prime		—		—		—		—
Consumer - Home Equity		—		—		1		45
Consumer - Indirect automobile		—		—		—		—
Consumer - Credit card		—		—		—		—
Consumer - Other		1		—		1		—
Total		40	$	1,600		54	$	17,305

Non-Covered Legacy Loans [Member]

Schedule of Aging of Non-Covered Loans

The following tables provide an analysis of the aging of non-covered loans as of December 31, 2014 and 2013.

	December 31, 2014
	Legacy loans
	Past Due (1)								Current		Total Legacy Loans, Net of Unearned Income		Recorded Investment > 90 days and Accruing
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total
Commercial real estate - Construction	$	507	$	—	$	69	$	576	$	483,663	$	484,239	$	—
Commercial real estate - Other		11,799		148		6,883		18,830		3,214,989		3,233,819		—
Commercial business		1,589		1,860		3,228		6,677		3,277,463		3,284,140		200
Residential mortgage - Prime		1,389		2,616		11,305		15,310		392,900		408,210		538
Residential mortgage - Subprime		—		—		3,595		3,595		115,889		119,484		—
Consumer - Home equity		4,096		595		7,420		12,111		1,278,865		1,290,976		16
Consumer - Indirect automobile		2,447		396		1,419		4,262		392,504		396,766		—
Consumer - Credit card		253		163		1,032		1,448		71,297		72,745		—
Consumer - Other		1,285		424		773		2,482		375,853		378,335		—
Total	$	23,365	$	6,202	$	35,724	$	65,291	$	9,603,423	$	9,668,714	$	754
	December 31, 2013
	Legacy loans
	Past Due (1)								Current		Total Legacy Loans, Net of Unearned Income		Recorded Investment > 90 days and Accruing
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total
Commercial real estate - Construction	$	—	$	—	$	1,803	$	1,803	$	381,292	$	383,095	$	—
Commercial real estate - Other		6,098		5,630		7,650		19,378		2,732,431		2,751,809		2
Commercial business		2,117		423		15,020		17,560		2,888,491		2,906,051		—
Residential mortgage - Prime		1,104		852		9,684		11,640		286,167		297,807		1,073
Residential mortgage - Subprime		—		—		1,626		1,626		114,939		116,565		—
Consumer - Home equity		1,956		569		6,808		9,333		1,091,894		1,101,227		—
Consumer - Indirect automobile		1,427		293		1,275		2,995		370,388		373,383		—
Consumer - Credit card		266		92		411		769		62,873		63,642		—
Consumer - Other		458		106		485		1,049		293,693		294,742		—
Total	$	13,426	$	7,965	$	44,762	$	66,153	$	8,222,168	$	8,288,321	$	1,075

⁽¹⁾  Past due loans greater than 90 days include all loans on nonaccrual status, regardless of past due status, as of the period indicated. Nonaccrual loans are presented separately in the “Nonaccrual Loans” section below.

Non-Covered Acquired Loans [Member]

Schedule of Aging of Non-Covered Loans

	December 31, 2014
	Non-covered acquired loans
	Past Due (1)								Current		Discount/ Premium			Total Non-covered Acquired Loans, Net of Unearned Income		Recorded Investment > 90 days and Accruing
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total
Commercial real estate - Construction	$	2,740	$	57	$	1,284	$	4,081	$	26,667	$	(1,170	)	$	29,578	$	1,284
Commercial real estate - Other		4,419		840		26,480		31,739		475,751		(39,119	)		468,371		26,376
Commercial business		2,106		70		1,635		3,811		94,962		(5,224	)		93,549		1,635
Residential mortgage - Prime		152		2,367		9,339		11,858		418,552		(5,831	)		424,579		8,087
Consumer - Home equity		649		385		8,774		9,808		216,310		(8,419	)		217,699		8,383
Consumer - Indirect automobile		13		17		9		39		393		(40	)		392		9
Consumer - Other		1,458		113		1,949		3,520		94,315		(4,217	)		93,618		1,829
Total	$	11,537	$	3,849	$	49,470	$	64,856	$	1,326,950	$	(64,020	)	$	1,327,786	$	47,603
	December 31, 2013
	Non-covered acquired loans
	Past Due (1)								Current		Discount/ Premium			Total Non-covered Acquired Loans, Net of Unearned Income		Recorded Investment > 90 days and Accruing
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total
Commercial real estate - Construction	$	388	$	—	$	2,542	$	2,930	$	19,833	$	(2,532	)	$	20,231	$	2,542
Commercial real estate - Other		1,798		1,963		27,967		31,728		345,286		(52,176	)		324,838		27,967
Commercial business		544		—		1,218		1,762		54,189		(2,914	)		53,037		1,218
Residential mortgage - Prime		—		—		226		226		18,796		(887	)		18,135		226
Consumer - Home equity		313		516		4,242		5,071		53,995		(5,623	)		53,443		4,242
Consumer - Indirect automobile		33		—		95		128		1,725		—			1,853		95
Consumer - Other		175		101		975		1,251		12,598		(1,481	)		12,368		975
Total	$	3,251	$	2,580	$	37,265	$	43,096	$	506,422	$	(65,613	)	$	483,905	$	37,265

⁽¹⁾  Past due information presents acquired loans at the gross loan balance, prior to application of discounts.

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Capital Requirements and Other Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2014

Banking and Thrift [Abstract]

Actual Capital Amounts and Ratios

The Company’s and IBERIABANK’s actual capital amounts and ratios as of December 31 are presented in the following table.

(Dollars in thousands)	2014
	Minimum					Well Capitalized					Actual
	Amount		Ratio			Amount		Ratio			Amount		Ratio
Tier 1 Leverage
Consolidated	$	602,387		4.00	%	$	N/A		N/A	%	$	1,408,842		9.36	%
IBERIABANK		600,149		4.00			750,186		5.00			1,266,241		8.44
Tier 1 risk-based capital
Consolidated	$	504,114		4.00	%	$	N/A		N/A	%	$	1,408,842		11.18	%
IBERIABANK		502,421		4.00			753,631		6.00			1,266,241		10.08
Total risk-based capital
Consolidated	$	1,008,227		8.00	%	$	N/A		N/A	%	$	1,550,789		12.31	%
IBERIABANK		1,004,841		8.00			1,256,052		10.00			1,408,188		11.21
	2013
	Minimum					Well Capitalized					Actual
	Amount		Ratio			Amount		Ratio			Amount		Ratio
Tier 1 Leverage
Consolidated	$	507,760		4.00	%	$	N/A		N/A	%	$	1,231,886		9.70	%
IBERIABANK		505,723		4.00			632,154		5.00			1,069,783		8.46
Tier 1 risk-based capital
Consolidated	$	426,002		4.00	%	$	N/A		N/A	%	$	1,231,886		11.57	%
IBERIABANK		424,578		4.00			636,868		6.00			1,069,783		10.08
Total risk-based capital
Consolidated	$	852,005		8.00	%	$	N/A		N/A	%	$	1,365,280		12.82	%
IBERIABANK		849,157		8.00			1,061,446		10.00			1,202,738		11.33

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Acquisition and Disposition Activity - Schedule of Branch Closure Costs (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Business Combinations [Abstract]
Employee termination	$ 299	$ 477
Accelerated depreciation	1,033	576
Contract termination	659	20
Impairment	4,941	2,743
Total	$ 6,932	$ 3,816

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Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Assets
Cash and due from banks	$ 251,994	$ 238,672
Interest-bearing deposits in banks	296,101	152,724
Total cash and cash equivalents	548,095	391,396
Securities available for sale, at fair value	2,158,853	1,936,797
Securities held to maturity (fair values of $119,481 and $152,566, respectively)	116,960	154,109
Mortgage loans held for sale ($139,950 and $97,273 recorded at fair value, respectively)	140,072	128,442
Loans covered by loss share agreements	444,544	719,793
Non-covered loans, net of unearned income	10,996,500	8,772,226
Total loans, net of unearned income	11,441,044	9,492,019
Allowance for loan losses	(130,131)	(143,074)
Loans, net	11,310,913	9,348,945
FDIC loss share receivables	69,627	162,312
Premises and equipment, net	307,159	287,510
Goodwill	517,526	401,872
Other assets	589,400	554,167
Total Assets	15,758,605	13,365,550
Deposits:
Non-interest-bearing	3,195,430	2,575,939
Interest-bearing	9,325,095	8,161,061
Total deposits	12,520,525	10,737,000
Short-term borrowings	845,742	680,344
Long-term debt	403,254	280,699
Other liabilities	136,235	136,528
Total Liabilities	13,905,756	11,834,571
Shareholders' Equity
Preferred stock, $1 par value - 5,000,000 shares authorized
Common stock, $1 par value - 50,000,000 shares authorized; 35,262,901 and 31,917,385 shares issued, respectively	35,263	31,917
Additional paid-in capital	1,398,633	1,178,284
Retained earnings	497,274	436,141
Accumulated other comprehensive income (loss)	7,525	(16,491)
Treasury stock at cost - 1,809,497 and 2,130,841 shares, respectively	(85,846)	(98,872)
Total Shareholders' Equity	1,852,849	1,530,979
Total Liabilities and Shareholders' Equity	$ 15,758,605	$ 13,365,550

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Premises and Equipment (Tables)

12 Months Ended

Dec. 31, 2014

Property, Plant and Equipment [Abstract]

Schedule of Premises and Equipment

Premises and equipment consisted of the following at December 31:

(Dollars in thousands)	2014			2013
Land	$	75,916		$	77,113
Buildings		232,727			217,469
Furniture, fixtures and equipment		128,388			110,663
Total premises and equipment		437,031			405,245
Accumulated depreciation		(129,872	)		(117,735	)
Total premises and equipment, net	$	307,159		$	287,510

Schedule of Minimum Future Annual Rent Commitments

Minimum future annual rent commitments under lease agreements for the periods indicated are as follows:

(Dollars in thousands)
2015	$	11,541
2016		9,878
2017		8,153
2018		7,333
2019		6,214
2020 and thereafter		31,860
	$	74,979

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Allowance for Credit Losses and Credit Quality - Schedule of Allowance for Loan Losses for Covered Loans, by Loan Portfolio (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
(Reversal of) Provision for loan losses	$ 6,495	$ 5,714	$ 4,748	$ 2,103	$ 4,700	$ 2,014	$ 1,807	$ (3,377)	$ 19,060	$ 5,145	$ 20,671
Transfer of balance to OREO									(7,323)	(28,126)	(27,169)
Transfer of balance to the RULC										(9,828)
Loans charged off									(26,855)	(26,481)	(25,060)
Recoveries									6,435	6,846	5,315
Balance at beginning of period				11,147					11,147
Transfer of balance from the allowance for loan losses										9,828
Balance at end of period	11,801				11,147				11,801	11,147
Balance at end of period	444,544				719,793				444,544	719,793
Non-Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period				71,899				83,027	71,899	83,027	74,861
(Reversal of) Provision for loan losses									12,728	3,670	13,603
Transfer of balance to OREO									(933)	(1,085)	(826)
Transfer of balance to the RULC										(9,828)
Transfer of balance to non-covered									8,661
Loans charged off									(13,385)	(10,717)	(9,907)
Recoveries									6,397	6,832	5,296
Balance at end of period	85,367				71,899				85,367	71,899	83,027
Balance at beginning of period				11,147					11,147
Transfer of balance from the allowance for loan losses										9,828
(Reversal of) Provision for unfunded commitments									654	1,319
Balance at end of period	11,801				11,147				11,801	11,147
Allowance on loans individually evaluated for impairment	430				1,029				430	1,029	880
Allowance on loans collectively evaluated for impairment	84,939				70,870				84,939	70,870	82,147
Balance at end of period	10,996,500				8,772,226				10,996,500	8,772,226	7,405,824
Balance at end of period individually evaluated for impairment	11,700				26,182				11,700	26,182	34,471
Balance at end of period collectively evaluated for impairment	10,932,123				8,732,261				10,932,123	8,732,261	7,306,662
Balance at end of period acquired with deteriorated credit quality	52,677				13,783				52,677	13,783	64,691
Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period				71,175				168,576	71,175	168,576	118,900
(Reversal of) Provision for loan losses									6,332	1,475	7,068
(Decrease) Increase in FDIC loss share receivable									(4,260)	(56,085)	84,085
Transfer of balance to OREO									(6,390)	(27,041)	(26,343)
Transfer of balance to non-covered									(8,661)
Loans charged off									(13,470)	(15,764)	(15,153)
Recoveries									38	14	19
Balance at end of period	44,764				71,175				44,764	71,175	168,576
Allowance on loans collectively evaluated for impairment	44,764				71,175				44,764	71,175	168,576
Balance at end of period	444,544				719,793				444,544	719,793	1,092,756
Balance at end of period collectively evaluated for impairment	444,544				653,716				444,544	653,716	879,111
Balance at end of period acquired with deteriorated credit quality	37,532				66,077				37,532	66,077	213,645
Real Estate [Member] | Non-Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period				26,590				38,264	26,590	38,264	35,604
(Reversal of) Provision for loan losses									(295)	(8,830)	1,786
Transfer of balance to OREO										(319)	(292)
Transfer of balance to the RULC										(2,939)
Transfer of balance to non-covered									6,009
Loans charged off									(2,247)	(2,940)	(2,000)
Recoveries									2,964	3,354	3,166
Balance at end of period	33,021				26,590				33,021	26,590	38,264
Balance at beginning of period				3,089					3,089
Transfer of balance from the allowance for loan losses										2,939
(Reversal of) Provision for unfunded commitments									350	150
Balance at end of period	3,439				3,089				3,439	3,089
Allowance on loans individually evaluated for impairment	20				8				20	8	226
Allowance on loans collectively evaluated for impairment	33,001				26,582				33,001	26,582	38,038
Balance at end of period	4,216,007				3,479,973				4,216,007	3,479,973	2,990,700
Balance at end of period individually evaluated for impairment	7,013				8,705				7,013	8,705	28,052
Balance at end of period collectively evaluated for impairment	4,186,968				3,459,028				4,186,968	3,459,028	2,906,792
Balance at end of period acquired with deteriorated credit quality	22,026				12,240				22,026	12,240	55,856
Real Estate [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period				38,772				100,871	38,772	100,871	69,175
(Reversal of) Provision for loan losses									3,058	1,523	4,970
(Decrease) Increase in FDIC loss share receivable									227	(28,238)	51,543
Transfer of balance to OREO									(1,897)	(19,634)	(11,202)
Transfer of balance to non-covered									(6,009)
Loans charged off									(10,117)	(15,764)	(13,631)
Recoveries									38	14	16
Balance at end of period	24,072				38,772				24,072	38,772	100,871
Allowance on loans collectively evaluated for impairment	24,072				38,772				24,072	38,772	100,871
Balance at end of period	187,873				387,332				187,873	387,332	640,843
Balance at end of period collectively evaluated for impairment	189,126				372,428				189,126	372,428	473,101
Balance at end of period acquired with deteriorated credit quality	1,253				14,904				1,253	14,904	167,742
Commercial Business [Member] | Non-Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period				28,515				28,721	28,515	28,721	25,705
(Reversal of) Provision for loan losses									4,302	3,543	4,021
Transfer of balance to OREO									(868)	(113)
Transfer of balance to the RULC										(3,497)
Transfer of balance to non-covered									1,699
Loans charged off									(1,659)	(516)	(1,116)
Recoveries									105	377	111
Balance at end of period	32,094				28,515				32,094	28,515	28,721
Balance at beginning of period				4,839					4,839
Transfer of balance from the allowance for loan losses										3,497
(Reversal of) Provision for unfunded commitments									421	1,342
Balance at end of period	5,260				4,839				5,260	4,839
Allowance on loans individually evaluated for impairment	407				841				407	841	449
Allowance on loans collectively evaluated for impairment	31,687				27,674				31,687	27,674	28,272
Balance at end of period	3,377,689				2,959,088				3,377,689	2,959,088	2,450,667
Balance at end of period individually evaluated for impairment	3,988				15,812				3,988	15,812	4,401
Balance at end of period collectively evaluated for impairment	3,369,982				2,943,246				3,369,982	2,943,246	2,442,796
Balance at end of period acquired with deteriorated credit quality	3,719				30				3,719	30	3,470
Commercial Business [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period				5,380				11,375	5,380	11,375	9,788
(Reversal of) Provision for loan losses									399	(649)	964
(Decrease) Increase in FDIC loss share receivable									509	(5,032)	3,616
Transfer of balance to OREO									(1,162)	(314)	(2,993)
Transfer of balance to non-covered									(1,699)
Loans charged off									(2,192)
Balance at end of period	1,235				5,380				1,235	5,380	11,375
Allowance on loans collectively evaluated for impairment	1,235				5,380				1,235	5,380	11,375
Balance at end of period	31,260				37,025				31,260	37,025	87,051
Balance at end of period collectively evaluated for impairment	31,260				37,025				31,260	37,025	84,294
Balance at end of period acquired with deteriorated credit quality											2,757
Residential Mortgage [Member] | Non-Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period				2,546				2,125	2,546	2,125	897
(Reversal of) Provision for loan losses									694	860	2,578
Transfer of balance to OREO										(646)	(525)
Transfer of balance to the RULC										(40)
Loans charged off									(613)	(518)	(863)
Recoveries									248	765	38
Balance at end of period	2,875				2,546				2,875	2,546	2,125
Balance at beginning of period				72					72
Transfer of balance from the allowance for loan losses										40
(Reversal of) Provision for unfunded commitments									96	32
Balance at end of period	168				72				168	72
Allowance on loans individually evaluated for impairment					180					180	163
Allowance on loans collectively evaluated for impairment	2,875				2,366				2,875	2,366	1,962
Balance at end of period	952,273				432,507				952,273	432,507	290,040
Balance at end of period individually evaluated for impairment					1,407					1,407	1,703
Balance at end of period collectively evaluated for impairment	936,604				430,974				936,604	430,974	288,007
Balance at end of period acquired with deteriorated credit quality	15,669				126				15,669	126	330
Residential Mortgage [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period				10,889				22,566	10,889	22,566	21,184
(Reversal of) Provision for loan losses									1,168	286	323
(Decrease) Increase in FDIC loss share receivable									(3,854)	(4,896)	13,895
Transfer of balance to OREO									(1,719)	(7,067)	(11,323)
Loans charged off									(198)		(1,513)
Balance at end of period	6,286				10,889				6,286	10,889	22,566
Allowance on loans collectively evaluated for impairment	6,286				10,889				6,286	10,889	22,566
Balance at end of period	105,106				154,025				105,106	154,025	187,164
Balance at end of period collectively evaluated for impairment	128,024				125,802				128,024	125,802	166,932
Balance at end of period acquired with deteriorated credit quality	22,918				28,223				22,918	28,223	20,232
Consumer [Member] | Non-Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period				14,248				13,917	14,248	13,917	12,655
(Reversal of) Provision for loan losses									8,027	8,097	5,218
Transfer of balance to OREO									(65)	(7)	(9)
Transfer of balance to the RULC										(3,352)
Transfer of balance to non-covered									953
Loans charged off									(8,866)	(6,743)	(5,928)
Recoveries									3,080	2,336	1,981
Balance at end of period	17,377				14,248				17,377	14,248	13,917
Balance at beginning of period				3,147					3,147
Transfer of balance from the allowance for loan losses										3,352
(Reversal of) Provision for unfunded commitments									(213)	(205)
Balance at end of period	2,934				3,147				2,934	3,147
Allowance on loans individually evaluated for impairment	3								3		42
Allowance on loans collectively evaluated for impairment	17,374				14,248				17,374	14,248	13,875
Balance at end of period	2,450,531				1,900,658				2,450,531	1,900,658	1,674,417
Balance at end of period individually evaluated for impairment	699				258				699	258	315
Balance at end of period collectively evaluated for impairment	2,438,569				1,899,013				2,438,569	1,899,013	1,669,067
Balance at end of period acquired with deteriorated credit quality	11,263				1,387				11,263	1,387	5,035
Consumer [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period				16,134				33,764	16,134	33,764	18,753
(Reversal of) Provision for loan losses									1,707	315	811
(Decrease) Increase in FDIC loss share receivable									(1,142)	(17,919)	15,031
Transfer of balance to OREO									(1,612)	(26)	(825)
Transfer of balance to non-covered									(953)
Loans charged off									(963)		(9)
Recoveries											3
Balance at end of period	13,171				16,134				13,171	16,134	33,764
Allowance on loans collectively evaluated for impairment	13,171				16,134				13,171	16,134	33,764
Balance at end of period	82,773				141,411				82,773	141,411	177,698
Balance at end of period collectively evaluated for impairment	96,134				118,461				96,134	118,461	154,784
Balance at end of period acquired with deteriorated credit quality	$ 13,361				$ 22,950				$ 13,361	$ 22,950	$ 22,914

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Capital Requirements and Other Regulatory Matters - Actual Capital Amounts and Ratios (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Consolidated [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 Leverage, Minimum Amount	$ 602,387	$ 507,760
Tier 1 risk-based capital, Minimum Amount	504,114	426,002
Total risk-based capital, Minimum Amount	1,008,227	852,005
Tier 1 Leverage capital, Minimum Ratio	4.00%	4.00%
Tier 1 risk-based capital, Minimum Ratio	4.00%	4.00%
Total risk-based capital, Minimum Ratio	8.00%	8.00%
Tier 1 Leverage, Actual Amount	1,408,842	1,231,886
Tier 1 risk-based capital, Actual Amount	1,408,842	1,231,886
Total risk-based capital, Actual Amount	1,550,789	1,365,280
Tier 1 Leverage, Actual Ratio	9.36%	9.70%
Tier 1 risk-based capital, Actual Ratio	11.18%	11.57%
Total risk-based capital, Actual Ratio	12.31%	12.82%
IBERIABANK [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 Leverage, Minimum Amount	600,149	505,723
Tier 1 risk-based capital, Minimum Amount	502,421	424,578
Total risk-based capital, Minimum Amount	1,004,841	849,157
Tier 1 Leverage capital, Minimum Ratio	4.00%	4.00%
Tier 1 risk-based capital, Minimum Ratio	4.00%	4.00%
Total risk-based capital, Minimum Ratio	8.00%	8.00%
Tier 1 Leverage capital, Well Capitalized Amount	750,186	632,154
Tier 1 risk-based capital, Well Capitalized Amount	753,631	636,868
Total risk-based capital, Well Capitalized Amount	1,256,052	1,061,446
Tier 1 Leverage capital, Well Capitalized Ratio	5.00%	5.00%
Tier 1 risk-based capital, Well Capitalized Ratio	6.00%	6.00%
Total risk-based capital, Well Capitalized Ratio	10.00%	10.00%
Tier 1 Leverage, Actual Amount	1,266,241	1,069,783
Tier 1 risk-based capital, Actual Amount	1,266,241	1,069,783
Total risk-based capital, Actual Amount	$ 1,408,188	$ 1,202,738
Tier 1 Leverage, Actual Ratio	8.44%	8.46%
Tier 1 risk-based capital, Actual Ratio	10.08%	10.08%
Total risk-based capital, Actual Ratio	11.21%	11.33%

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Other Real Estate Owned - Schedule of Other Real Estate Owned Segregated into Non-Covered and Covered Properties (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Real Estate Properties [Line Items]
Real estate owned acquired by foreclosure	$ 41,486	$ 88,546
Real estate acquired for development or resale	11,556	9,206
Other foreclosed property	905	1,421
Total other real estate owned and foreclosed property	53,947	99,173
Non-covered Properties [Member]
Real Estate Properties [Line Items]
Real estate owned acquired by foreclosure	18,614	28,072
Real estate acquired for development or resale	11,556	9,206
Other foreclosed property	81	93
Total other real estate owned and foreclosed property	30,251	37,371
Covered Properties [Member]
Real Estate Properties [Line Items]
Real estate owned acquired by foreclosure	22,872	60,474
Other foreclosed property	824	1,328
Total other real estate owned and foreclosed property	$ 23,696	$ 61,802

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Consolidated Statements of Shareholders' Equity (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash dividends declared per share	$ 1.36	$ 1.36	$ 1.36
Retained Earnings [Member]
Cash dividends declared per share	$ 1.36	$ 1.36	$ 1.36

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Loans - Schedule of Subsequently Defaulted TDRs (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 SecurityLoan	Dec. 31, 2013 SecurityLoan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans		9
Pre-modification Outstanding Recorded Investment		$ 14,835
Post-modification Outstanding Recorded Investment		12,429
TDRs Occurring During The Period [Member] | Non-Covered TDRs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans	40	54
Recorded Investment	1,600	17,305
Real Estate [Member] | Commercial Loans [Member] | TDRs Occurring During The Period [Member] | Non-Covered TDRs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans		9
Pre-modification Outstanding Recorded Investment		14,835
Post-modification Outstanding Recorded Investment		12,429
Number of Loans	30	35
Recorded Investment		4,452
Business [Member] | Commercial Loans [Member] | TDRs Occurring During The Period [Member] | Non-Covered TDRs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans	9	17
Recorded Investment	1,600	12,808
Home Equity [Member] | Consumer and Other Loans [Member] | TDRs Occurring During The Period [Member] | Non-Covered TDRs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans		1
Recorded Investment		$ 45
Consumer - Other [Member] | Consumer and Other Loans [Member] | TDRs Occurring During The Period [Member] | Non-Covered TDRs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans	1	1

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Condensed Parent Company Only Financial Statements - Condensed Statements of Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Parent Company Only Financial Information [Line Items]
Other income									$ 28,716	$ 23,988	$ 21,880
Interest expense	12,596	12,042	10,241	9,824	10,654	11,060	11,695	13,545	44,704	46,953	63,450
Salaries and employee benefits expense									259,086	244,981	233,777
Other expenses									33,786	31,945	29,001
Income (loss) before income tax benefit and increase in equity in undistributed earnings of subsidiaries	45,875	42,789	20,977	30,558	34,779	30,549	19,803	(4,159)	140,200	80,972	104,891
Income tax benefit	9,939	11,897	4,750	8,163	9,175	7,357	4,213	(4,876)	34,750	15,869	28,496
Net income	35,936	30,892	16,227	22,395	25,604	23,192	15,590	717	105,450	65,103	76,395
IBERIABANK Corporation [Member]
Parent Company Only Financial Information [Line Items]
Dividends from bank subsidiary										49,000	70,000
Dividends from non-bank subsidiaries										1,511
Reimbursement of management expenses									46,433	34,474	94,053
Other income									437	869	(836)
Total operating income									46,870	85,854	163,217
Interest expense									3,224	3,232	3,427
Salaries and employee benefits expense									31,981	29,159	76,527
Other expenses									14,576	13,676	47,309
Total operating expenses									49,781	46,067	127,263
Income (loss) before income tax benefit and increase in equity in undistributed earnings of subsidiaries									(2,911)	39,787	35,954
Income tax benefit									(518)	(2,808)	(11,842)
Income (loss) before equity in undistributed earnings of subsidiaries									(2,393)	42,595	47,796
Equity in undistributed earnings of subsidiaries									107,843	22,508	28,599
Net income									$ 105,450	$ 65,103	$ 76,395

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Share-Based Compensation - Estimate Fair Value of Stock Option Awards with Weighted-Average Assumptions (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected dividends	2.10%	2.60%	2.70%
Expected volatility	35.80%	34.80%	40.10%
Risk-free interest rate	2.30%	1.70%	0.80%
Expected term (in years)	7 years 6 months	8 years 7 months 6 days	5 years
Weighted-average grant-date fair value	$ 21.26	$ 15.37	$ 14.50

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Share-Based Compensation - Schedule of Weighted Average Remaining Life of Options Outstanding within Stated Exercise Prices (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range Per Share, Options Outstanding, Number of Options	867,682
Exercise Price Range Per Share, Options Outstanding, Weighted Average Exercise Price	$ 55.92
Exercise Price Range Per Share, Options Outstanding, Weighted Average Remaining Life	5 years 1 month 6 days
Exercise Price Range Per Share, Options Exercisable, Number of Options	562,752
Exercise Price Range Per Share, Options Exercisable, Weighted Average Exercise Price	$ 55.92
Exercise Price Range Per Share From 34.33 to 51.69 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range Per Share, Options Outstanding, Number of Options	182,416
Exercise Price Range Per Share, Options Outstanding, Weighted Average Exercise Price	$ 49.24
Exercise Price Range Per Share, Options Outstanding, Weighted Average Remaining Life	4 years 3 months 18 days
Exercise Price Range Per Share, Options Exercisable, Number of Options	118,312
Exercise Price Range Per Share, Options Exercisable, Weighted Average Exercise Price	$ 48.53
Exercise Price Range Per Share, Minimum	$ 34.33
Exercise Price Range Per Share, Maximum	$ 51.69
Exercise Price Range Per Share From 51.70 to 52.35 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range Per Share, Options Outstanding, Number of Options	111,197
Exercise Price Range Per Share, Options Outstanding, Weighted Average Exercise Price	$ 52.33
Exercise Price Range Per Share, Options Outstanding, Weighted Average Remaining Life	7 years 1 month
Exercise Price Range Per Share, Options Exercisable, Number of Options	43,156
Exercise Price Range Per Share, Options Exercisable, Weighted Average Exercise Price	$ 52.33
Exercise Price Range Per Share, Minimum	$ 51.70
Exercise Price Range Per Share, Maximum	$ 52.35
Exercise Price Range Per Share From 52.36 to 54.68 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range Per Share, Options Outstanding, Number of Options	146,995
Exercise Price Range Per Share, Options Outstanding, Weighted Average Exercise Price	$ 53.43
Exercise Price Range Per Share, Options Outstanding, Weighted Average Remaining Life	6 years 6 months
Exercise Price Range Per Share, Options Exercisable, Number of Options	90,146
Exercise Price Range Per Share, Options Exercisable, Weighted Average Exercise Price	$ 54.10
Exercise Price Range Per Share, Minimum	$ 52.36
Exercise Price Range Per Share, Maximum	$ 54.68
Exercise Price Range Per Share From 54.69 to 57.60 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range Per Share, Options Outstanding, Number of Options	142,360
Exercise Price Range Per Share, Options Outstanding, Weighted Average Exercise Price	$ 56.52
Exercise Price Range Per Share, Options Outstanding, Weighted Average Remaining Life	3 years 8 months 12 days
Exercise Price Range Per Share, Options Exercisable, Number of Options	120,873
Exercise Price Range Per Share, Options Exercisable, Weighted Average Exercise Price	$ 56.68
Exercise Price Range Per Share, Minimum	$ 54.69
Exercise Price Range Per Share, Maximum	$ 57.60
Exercise Price Range Per Share From 57.61 to 59.83 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range Per Share, Options Outstanding, Number of Options	105,666
Exercise Price Range Per Share, Options Outstanding, Weighted Average Exercise Price	$ 58.38
Exercise Price Range Per Share, Options Outstanding, Weighted Average Remaining Life	1 year 6 months
Exercise Price Range Per Share, Options Exercisable, Number of Options	105,666
Exercise Price Range Per Share, Options Exercisable, Weighted Average Exercise Price	$ 58.38
Exercise Price Range Per Share, Minimum	$ 57.61
Exercise Price Range Per Share, Maximum	$ 59.83
Exercise Price Range Per Share From 59.84 to 111.71 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range Per Share, Options Outstanding, Number of Options	179,048
Exercise Price Range Per Share, Options Outstanding, Weighted Average Exercise Price	$ 65.06
Exercise Price Range Per Share, Options Outstanding, Weighted Average Remaining Life	6 years 8 months 12 days
Exercise Price Range Per Share, Options Exercisable, Number of Options	84,599
Exercise Price Range Per Share, Options Exercisable, Weighted Average Exercise Price	$ 65.89
Exercise Price Range Per Share, Minimum	$ 59.84
Exercise Price Range Per Share, Maximum	$ 111.71

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Condensed Parent Company Only Financial Statements (Tables)

12 Months Ended

Dec. 31, 2014

Condensed Financial Information of Parent Company Only Disclosure [Abstract]

Condensed Balance Sheets

Condensed financial statements of IBERIABANK Corporation (parent company only) are shown below. The parent company has no significant operating activities.

Condensed Balance Sheets

(Dollars in thousands)	December 31
	2014		2013
Assets
Cash in bank	$	36,064	$	98,108
Investment in subsidiaries		1,842,120		1,487,337
Other assets		119,494		80,528
	$	1,997,678	$	1,665,973
Liabilities and Shareholders’ Equity
Liabilities	$	144,829	$	134,994
Shareholders’ Equity		1,852,849		1,530,979
	$	1,997,678	$	1,665,973

Condensed Statements of Income

Condensed Statements of Income

(Dollars in thousands)	Year Ended December 31
	2014			2013			2012
Operating income
Dividends from bank subsidiary	$	—		$	49,000		$	70,000
Dividends from non-bank subsidiaries		—			1,511			—
Reimbursement of management expenses		46,433			34,474			94,053
Other income		437			869			(836	)
Total operating income		46,870			85,854			163,217
Operating expenses
Interest expense		3,224			3,232			3,427
Salaries and employee benefits expense		31,981			29,159			76,527
Other expenses		14,576			13,676			47,309
Total operating expenses		49,781			46,067			127,263
Income (loss) before income tax benefit and increase in equity in undistributed earnings of subsidiaries		(2,911	)		39,787			35,954
Income tax benefit		(518	)		(2,808	)		(11,842	)
Income (loss) before equity in undistributed earnings of subsidiaries		(2,393	)		42,595			47,796
Equity in undistributed earnings of subsidiaries		107,843			22,508			28,599
Net income	$	105,450		$	65,103		$	76,395

Condensed Statements of Cash Flows

Condensed Statements of Cash Flows

(Dollars in thousands)	Year Ended December 31
	2014			2013			2012
Cash Flow from Operating Activities
Net income	$	105,450		$	65,103		$	76,395
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		595			2,035			4,926
Net income of subsidiaries		(107,843	)		(73,019	)		(98,599	)
Noncash compensation expense		11,984			10,704			9,907
Loss on sale of assets		—			—			7
Derivative losses on swaps		—			—			2
Tax benefit associated with share-based payment arrangements		(2,105	)		(886	)		(1,221	)
Other, net		(27,273	)		7,574			(10,557	)
Net Cash (Used in) Provided by Operating Activities		(19,192	)		11,511			(19,140	)
Cash Flow from Investing Activities
Cash received in excess of cash paid in acquisition		4,783			—			1,272
Proceeds from sale of premises and equipment		—			11,751			5
Purchases of premises and equipment		(36	)		(5,247	)		(4,173	)
Capital contributed to subsidiary		(14,600	)		—			(2,000	)
Dividends received from subsidiaries		—			50,511			70,000
Acquisition		—			—			—
Net Cash Provided by (Used in) Investing Activities		(9,853	)		57,015			65,104
Cash Flow from Financing Activities
Repayments of long-term debt		—			—			(2,867	)
Dividends paid to shareholders		(43,070	)		(40,332	)		(40,069	)
Proceeds from sale of treasury stock for stock options exercised		11,693			8,101			2,813
Payments to repurchase common stock		(3,727	)		(2,280	)		(42,245	)
Common stock issued		—			—			—
Costs of issuance of common stock		—			—			—
Tax benefit associated with share-based payment arrangements		2,105			886			1,221
Net Cash Used In Financing Activities		(32,999	)		(33,625	)		(81,147	)
Net (Decrease) Increase in Cash and Cash Equivalents		(62,044	)		34,901			(35,183	)
Cash and Cash Equivalents at Beginning of Period		98,108			63,207			98,390
Cash and Cash Equivalents at End of Period	$	36,064		$	98,108		$	63,207

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Loss Sharing Agreements and FDIC Loss Share Receivable - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2014 Business	Dec. 31, 2013
Receivables [Abstract]
Percentage of covered loan and foreclosed real estate losses		80.00%
Losses that exceed contractual thresholds		95.00%
Number of acquisitions		4
Recovery period for covered assets		3 years
Liability for reserve for amount of consideration			$ 800,000
FDIC loss share receivables		69,627,000	162,312,000
Valuation allowance against indemnification assets	$ 31,800,000	$ 5,121,000	$ 31,813,000

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Quarterly Results of Operations and Selected Cash Flow Data (Unaudited)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Quarterly Results of Operations and Selected Cash Flow Data (Unaudited)

NOTE 28 – QUARTERLY RESULTS OF OPERATIONS AND SELECTED CASH FLOW DATA (UNAUDITED)

	2014
(Dollars in thousands, except per share data)	Fourth Quarter			Third Quarter			Second Quarter			First Quarter
Total interest income	$	137,276		$	133,793		$	119,514		$	114,232
Total interest expense		12,596			12,042			10,241			9,824
Net interest income		124,680			121,751			109,273			104,408
Provision for loan losses		6,495			5,714			4,748			2,103
Net interest income after provision for loan losses		118,185			116,037			104,525			102,305
Gain on sale of investments, net		164			582			8			19
Other noninterest income		46,908			46,530			43,753			35,662
Noninterest expense		119,382			120,360			127,309			107,428
Income before income taxes		45,875			42,789			20,977			30,558
Income tax expense		9,939			11,897			4,750			8,163
Net income	$	35,936		$	30,892		$	16,227		$	22,395
Preferred stock dividends		—			—			—			—
Income available to common shareholders		35,936			30,892			16,227			22,395
Earnings allocated to unvested restricted stock		(530	)		(465	)		(258	)		(405	)
Earnings available to common shareholders - Diluted	$	35,406		$	30,427		$	15,969		$	21,990
Earnings per share - Basic	$	1.08		$	0.93		$	0.53		$	0.75
Earnings per share - Diluted		1.07			0.92			0.53			0.75
Cash dividends declared per common share		0.34			0.34			0.34			0.34
	2013
	Fourth Quarter			Third Quarter			Second Quarter			First Quarter
Total interest income	$	114,092		$	108,512		$	108,177		$	106,416
Total interest expense		10,654			11,060			11,695			13,545
Net interest income		103,438			97,452			96,482			92,871
(Reversal of) Provision for loan losses		4,700			2,014			1,807			(3,377	)
Net interest income after (reversal of) provision for loan losses		98,738			95,438			94,675			96,248
Gain (loss) on sale of investments, net		19			13			(57	)		2,359
Other noninterest income		38,696			43,250			42,546			42,132
Noninterest expense		102,674			108,152			117,361			144,898
Income (loss) before income taxes		34,779			30,549			19,803			(4,159	)
Income tax expense (benefit)		9,175			7,357			4,213			(4,876	)
Net income	$	25,604		$	23,192		$	15,590		$	717
Preferred stock dividends		—			—			—			—
Income available to common shareholders		25,604			23,192			15,590			717
Earnings allocated to unvested restricted stock		(456	)		(425	)		(293	)		(20	)
Earnings available to common shareholders - Diluted	$	25,148		$	22,767		$	15,297		$	697
Earnings per share - Basic	$	0.86		$	0.78		$	0.53		$	0.02
Earnings per share - Diluted		0.86			0.78			0.53			0.02
Cash dividends declared per common share		0.34			0.34			0.34			0.34

The Company has corrected its historical consolidated quarterly statements of comprehensive income for the three-month periods ended June 30, 2014 and September 30, 2014 for the impact of errors in its mortgage banking operation and purchase accounting adjustments. The correction of these errors reduces mortgage income in the consolidated statements of comprehensive income by $4.2 million in the second quarter of 2014 and increases mortgage income by $1.5 million in the third quarter of 2014. The correction did not have an effect on the Company’s consolidated statements of comprehensive income for the year ended December 31, 2014. The error was identified through the operation of the Company’s internal controls over financial reporting. The Company implemented changes to internal processes to reduce the likelihood of similar errors occurring in future periods.

The following table presents the effect this error correction and purchase accounting adjustments had on the reported consolidated statements of comprehensive income for the periods indicated:

			Adjustment
(Dollars in thousand, except per share data)	As Previously Reported		Error Correction			Purchase Accounting			As Adjusted
Three Months Ended June 30, 2014
Net interest income	$	108,979	$	—		$	294		$	109,273
Non-interest income		47,963		(4,189	)		(13	)		43,761
Non-interest expense		127,375		(170	)		104			127,309
Income tax expense		6,271		(1,656	)		135			4,750
Net income		18,548		(2,363	)		42			16,227
Earnings per share - basic		0.60		(0.07	)		—			0.53
Earnings per share - diluted		0.60		(0.07	)		—			0.53
Three Months Ended September 30, 2014
Net interest income	$	121,041	$	—		$	710		$	121,751
Non-interest income		45,663		1,487			(38	)		47,112
Non-interest expense		120,060		170			130			120,360
Income tax expense		11,186		521			190			11,897
Net income		29,744		796			352			30,892
Earnings per share - basic		0.89		0.03			0.01			0.93
Earnings per share - diluted		0.89		0.02			0.01			0.92

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Commitments and Contingencies - Summary of Financial Instruments Outstanding (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Loss Contingencies [Line Items]
Reserve for unfunded lending commitments	$ 11,801	$ 11,147
Credit Risk Contract [Member]
Loss Contingencies [Line Items]
Commitments to grant loans	161,350	221,627
Unfunded commitments under lines of credit	4,007,954	3,326,448
Commercial and standby letters of credit	134,882	105,026
Reserve for unfunded lending commitments	$ 11,801	$ 11,147

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Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Tax receivable, federal and state income taxes	$ 2,000,000
Tax payable, federal and state income taxes		8,000,000
Income tax rate reconciliation, federal statutory income tax rate	35.00%
Net tax benefit	(417,000)	1,257,000	1,313,000
Federal tax credits received	3,200,000
Other discrete items	3,600,000
Retained earnings of prior period	21,900,000	21,900,000
Valuation Allowance	0	0
Interest or penalties recognized	$ 0	$ 0	$ 0

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Earnings Per Share - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share Basic And Diluted [Line Items]
Weighted average number of shares, Recognition and Retention Plan	625,555	642,008	612,097
Weighted average number of shares, treasury stock	1,879,440	2,223,306	1,964,825
Stock Options [Member]
Earnings Per Share Basic And Diluted [Line Items]
Stock options having antidilutive effect on earnings per share	13,101	483,696	752,188

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Short-Term Borrowings

12 Months Ended

Dec. 31, 2014

Debt Disclosure [Abstract]

Short-Term Borrowings

NOTE 15 – SHORT-TERM BORROWINGS

Short-term borrowings at December 31 are summarized as follows:

(Dollars in thousands)	2014		2013
Federal Home Loan Bank advances	$	603,000	$	375,000
Securities sold under agreements to repurchase		242,742		305,344
	$	845,742	$	680,344

Securities sold under agreements to repurchase, which are classified as secured borrowings, generally mature daily and are reflected at the amount of cash received in connection with the transaction. The Company may be required to provide additional collateral based on the fair value of the underlying securities.

Additional information on the Company’s short-term borrowings for the years indicated is as follows:

(Dollars in thousands)	2014			2013			2012
Outstanding at December 31	$	845,742		$	680,344		$	303,045
Maximum month-end outstanding balance		1,034,741			680,344			640,768
Average daily outstanding balance		782,033			303,352			284,201
Average rate during the year		0.17	%		0.16	%		0.22	%
Average rate at year end		0.18	%		0.15	%		0.22	%

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Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Principles of Consolidation

PRINCIPLES OF CONSOLIDATION

The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries, IBERIABANK, Lenders Title Company (“LTC”), IBERIA Capital Partners L.L.C. (“ICP”), IB Aircraft Holdings, LLC, 1887 Leasing LLC, IBERIA Asset Management, Inc. (“IAM”), and IBERIA CDE, L.L.C. (“CDE”). All significant intercompany balances and transactions have been eliminated in consolidation. All normal, recurring adjustments which, in the opinion of management, are necessary for a fair presentation of the financial statements have been included. Certain amounts reported in prior periods have been reclassified to conform to the current period presentation.

Nature of Operations

NATURE OF OPERATIONS

The Company offers commercial and retail banking products and services to customers throughout locations in six states through IBERIABANK. The Company also operates mortgage production offices in twelve states through IBERIABANK Mortgage Company (“IMC”), and offers a full line of title insurance and closing services throughout Arkansas and Louisiana through LTC and its subsidiaries. ICP provides equity research, institutional sales and trading, and corporate finance services. 1887 Leasing LLC owns an aircraft used by management of the Company, and IB Aircraft Holdings, LLC owns a fractional share of a separate aircraft also used by management. IAM provides wealth management and trust services for commercial and private banking clients. CDE is engaged in the purchase of tax credits.

Use of Estimates

USE OF ESTIMATES

The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates. Material estimates that are susceptible to significant change in the near term are the allowance for credit losses, valuation of and accounting for loans covered by loss sharing arrangements with the FDIC and the related loss share receivables, and determination of fair values of assets acquired in acquisitions.

Concentration of Credit Risks

CONCENTRATION OF CREDIT RISKS

Most of the Company’s business activity is with customers located within the States of Louisiana, Florida, Arkansas, Alabama, Texas, and Tennessee. The Company’s lending activity is concentrated in its market areas in those states. The Company has emphasized originations of commercial loans and private banking loans, defined as loans to larger consumer clients. Repayments on loans are expected to come from cash flows of the borrower and/or guarantor. Losses on secured loans are limited by the value of the collateral upon default of the borrowers. The Company does not have any significant concentrations to any one industry or customer.

Cash and Cash Equivalents

CASH AND CASH EQUIVALENTS

For purposes of presentation in the consolidated statements of cash flows, cash and cash equivalents are defined as cash, interest-bearing deposits and non-interest-bearing demand deposits at other financial institutions with original maturities less than three months. IBERIABANK may be required to maintain average balances on hand or with the Federal Reserve Bank to meet regulatory reserve and clearing requirements. At December 31, 2014 and 2013, the required reserve balances were $17.4 million and $6.7 million, respectively. IBERIABANK had enough cash deposited with the Federal Reserve at December 31, 2014 and 2013 to cover the required reserve balance.

Investment Securities

INVESTMENT SECURITIES

Debt securities that management has the ability and intent to hold to maturity are classified as held to maturity and carried at cost, adjusted for amortization of premiums and accretion of discounts using methods approximating the interest method. Securities not classified as held to maturity or trading, including equity securities with readily determinable fair values, are classified as available for sale and recorded at fair value, with unrealized gains and losses excluded from earnings and reported in other comprehensive income. Declines in the value of individual held to maturity and available for sale securities below their cost that are other than temporary are included in earnings as realized losses. In estimating other than temporary impairment losses, management considers 1) the length of time and the extent to which the fair value has been less than cost, 2) the financial condition and near-term prospects of the issuer, 3) the intent and ability of the Company to retain its investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value, and 4) for debt securities, the recovery of contractual principal and interest. Gains or losses on securities sold are recorded on the trade date, using the specific identification method.

Loans Held for Sale

LOANS HELD FOR SALE

Loans held for sale primarily consist of fixed rate single-family residential mortgage loans originated and under contract to be sold in the secondary market. Mortgage loans originated and held for sale are recorded at fair value under the fair value option, unless otherwise noted. Any other loans held for sale are carried at the lower of cost or estimated fair value. For mortgage loans for which the Company has elected the fair value option, gains and losses are included in mortgage income. For any other loans held for sale, net unrealized losses, if any, are recognized through a valuation allowance that is recorded as a charge to income. See Note 23 for further discussion of the determination of fair value for loans held for sale. In most cases, loans in this category are sold within thirty days and are generally sold with the mortgage servicing rights released. Buyers generally have recourse to return a purchased loan to the Company under limited circumstances. Recourse conditions may include early payment default, breach of representations or warranties, and documentation deficiencies. During 2014 and 2013, an insignificant number of loans were returned to the Company. At December 31, 2014, mortgage loans held for sale subject to repurchase were immaterial.

Loans, Excluding Acquired Loans ("Legacy Loans")

LOANS, EXCLUDING ACQUIRED LOANS (“LEGACY LOANS”)

The Company grants mortgage, commercial and consumer loans to customers. Except for loans acquired, loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are stated at the unpaid principal balances, less the allowance for credit losses and net deferred loan origination fees and unearned discounts.

Interest income on loans is accrued over the term of the loans based on the principal balance outstanding. Loan origination fees, net of certain direct origination costs, are deferred and recognized as an adjustment of the related loan yield, using the effective interest method.

The accrual of interest on loans is discontinued at the time the loan is 90 days delinquent unless the credit is well-secured and in process of collection. Mortgage, credit card and other personal loans are typically charged down to net collateral value, less cost to sell, no later than 180 days past due. Past due status is based on the contractual terms of loans. In all cases, loans are placed on nonaccrual status or charged off at an earlier date if collection of principal or interest is considered doubtful.

The Company’s covered loan portfolio and non-covered loan portfolio, which is delineated between a) legacy loans and b) acquired loans, are disaggregated into portfolio segments for purposes of determining the allowance for credit losses. The Company’s portfolio segments include commercial, mortgage, and consumer. The Company further disaggregates each commercial, mortgage, and consumer portfolio segment into classes for purposes of monitoring and assessing credit quality based on certain risk characteristics. Classes within the commercial loan portfolio segment include commercial real estate construction, commercial real estate – other, and commercial business. Classes within the mortgage portfolio segment include mortgage – prime and mortgage – subprime. Classes within the consumer portfolio segment include home equity, indirect auto, credit card, and consumer – other.

Credit Quality

The Company utilizes an asset risk classification system in accordance with guidelines established by the Federal Reserve Board as part of its efforts to monitor commercial asset quality. “Special mention” loans are defined as loans where known information about possible credit problems of the borrower cause management to have some doubt as to the ability of these borrowers to comply with the present loan repayment terms and which may result in future disclosure of these loans as nonperforming. For assets with identified credit issues, the Company has two primary classifications for problem assets: “substandard” and “doubtful.” Substandard assets have one or more defined weaknesses and are characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. Doubtful assets have the weaknesses of substandard assets with the additional characteristic that the weaknesses make collection or liquidation in full satisfaction of the loan balance outstanding questionable, which makes probability of loss based on currently existing facts, conditions and values higher. Loans classified as “Pass” do not meet the criteria set forth for special mention, substandard, or doubtful classification and are not considered criticized. Asset risk classifications are periodically reviewed and changed if, in the opinion of management, the risk profile of the customer has changed since the last review of the loan relationship.

A loan is considered impaired when, based on current information and events, it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Impairment losses are measured on a loan by loan basis for commercial and certain consumer loans based on either the present value of expected future cash flows discounted at the loan’s effective interest rate, the loan’s observable market price, or the fair value of the collateral if the loan is collateral dependent.

In general, all interest accrued but not collected for loans that are placed on nonaccrual status or charged off is reversed against interest income. The interest on these loans is accounted for on the cash-basis method or cost-recovery method, until the loans qualify for a return to accrual status. Loans are returned to accrual status when all principal and interest amounts contractually due are brought current and future payments are reasonably assured.

Troubled Debt Restructurings

During the course of its lending operations, the Company periodically grants concessions to its customers in an attempt to protect as much of its investment as possible and minimize risk of loss. These concessions may include restructuring the terms of a customer loan to alleviate the burden of the customer’s near-term cash requirements. In order to be considered a troubled debt restructuring (“TDR”), the Company must conclude that the restructuring constitutes a concession and the customer is experiencing financial difficulties. The Company defines a concession to the customer as a modification of existing terms for economic or legal reasons that it would otherwise not consider. The concession is either granted through an agreement with the customer or is imposed by a court or law. Concessions include modifying original loan terms to reduce or defer cash payments required as part of the loan agreement, including but not limited to:

• a reduction of the stated interest rate for the remaining original life of the debt,

• extension of the maturity date or dates at a stated interest rate lower than the current market rate for new debt with similar risk characteristics,

• reduction of the face amount or maturity amount of the debt as stated in the agreement, or

• reduction of accrued interest receivable on the debt.

In its determination of whether the customer is experiencing financial difficulties, the Company considers numerous indicators, including, but not limited to:

• whether the customer is currently in default on its existing loan, or is in an economic position where it is probable the customer will be in default on its loan in the foreseeable future without a modification,

• whether the customer has declared or is in the process of declaring bankruptcy,

• whether there is substantial doubt about the customer’s ability to continue as a going concern,

• whether, based on its projections of the customer’s current capabilities, the Company believes the customer’s future cash flows will be insufficient to service the debt, including interest, in accordance with the contractual terms of the existing agreement for the foreseeable future, and

• whether, without modification, the customer cannot obtain sufficient funds from other sources at an effective interest rate equal to the current market rate for similar debt for a nontroubled debtor.

If the Company concludes that both a concession has been granted and the concession was granted to a customer experiencing financial difficulties, the Company identifies the loan as a TDR. For purposes of the determination of an allowance for credit losses for TDRs, the Company considers a loss probable on the loan, which is reviewed for specific impairment in accordance with the Company’s allowance for loan loss methodology. If it is determined that losses are probable on such TDRs, either because of delinquency or other credit quality indicator, the Company establishes specific reserves for these loans.

Acquired Loans

ACQUIRED LOANS

The Company accounts for its business combinations under the acquisition method, where all identifiable assets acquired, including loans, are recorded at fair value. Acquired loans are recorded at fair value in accordance with the fair value methodology consistent with the exit price concept. Credit risk assumptions and any resulting credit discounts are included in the determination of fair value. Therefore, an allowance for credit losses is not recorded at the acquisition date. The determination of fair value includes estimates related to discount rates, expected prepayments and the amount and timing of undiscounted expected principal, interest and other cash flows.

Acquired loans are evaluated at acquisition and classified as purchased impaired (“acquired impaired”) or purchased non-impaired (“acquired non-impaired”). Purchased impaired loans reflect credit deterioration since origination to the extent that it is probable at the time of acquisition that the Company will be unable to collect all contractually required payments. At the time of acquisition, purchased impaired loans are accounted for individually or aggregated into loan pools with similar characteristics, which include:

• whether the loan is performing according to contractual terms at the time of acquisition,

• the loan type based on regulatory reporting guidelines, namely whether the loan was a mortgage, consumer, or commercial loan

• the nature of collateral,

• the interest rate type, whether fixed or variable rate, and

• the loan payment type, primarily whether the loan is amortizing or interest-only.

From these pools, the Company uses certain loan information, including outstanding principal balance, estimated expected losses, weighted average maturity, weighted average term to re-price (if a variable rate loan), weighted average margin, and weighted average interest rate to estimate the expected cash flow for each loan pool.

For purchased impaired loans, expected cash flows at the acquisition date in excess of the fair value of loans are recorded as interest income over the life of the loans using a level yield method if the timing and amount of future cash flows is reasonably estimable. For purchased non-impaired loans, the difference between the fair value and unpaid principal balance of the loan at acquisition, referred to as a purchase premium or purchase discount, is amortized or accreted to income over the estimated life of the loans using a method that approximates the interest method.

Subsequent to acquisition, the Company performs cash flow re-estimations at least quarterly for each purchased impaired loan and/or loan pool. Increases in estimated cash flows above those expected at acquisition are recognized on a prospective basis as interest income over the remaining life of the pool. Decreases in expected cash flows subsequent to acquisition result in recognition of a provision for credit loss.

Purchased impaired loans are placed on nonaccrual status when the Company cannot reasonably estimate cash flows on a loan or loan pool.

FDIC Loss Share Receivable

FDIC LOSS SHARE RECEIVABLE

Because the FDIC reimburses the Company for losses on certain loans acquired in 2009 and 2010, indemnification assets were recorded at fair value as of the acquisition dates. The initial values of the indemnification assets were based on estimated cash flows to be received over the expected life of the acquired assets, not to exceed the term of the indemnification agreements. The loss sharing terms of the Company’s commercial and single family residential indemnification agreements are five years and ten years, respectively, from the date of acquisition. The CSB reimbursable loss period ended as of October 1, 2014 for all covered assets excluding single family residential assets. The CSB reimbursable loss period for single family residential assets will end during the third quarter of 2019. The Century and Orion reimbursable loss periods ended as of January 1, 2015 for all covered assets excluding single family residential assets and will end during the fourth quarter of 2019 for single family residential assets. The Sterling reimbursable loss period ends during the third quarter of 2015 for all covered assets excluding single family residential assets and during the third quarter of 2020 for single family residential assets. Assets are covered through expiration of the loss share term, at which point such assets are considered non-covered.

Because the indemnification assets are measured on the same basis as the indemnified (“covered”) loans, subject to contractual and collectability limitations, the indemnification assets are impacted by changes in expected cash flows on covered assets. Increases in credit losses expected to occur within the loss share term are recorded as current period increases to the allowance for credit losses and increase the amount collectible from the FDIC by the applicable loss share percentage. Decreases in credit losses expected to occur within the loss share term reduce the amount collectible from the FDIC and increase the amount collectible from customers in the form of prospective accretion on loans. Increases in the portion of indemnification asset collectible from customers are amortized to income. Periodic amortization represents the amount that is expected to result in symmetrical recognition of pool-level accretion and amortization over the shorter of 1) the life of the loan or 2) the life of the shared loss agreement.

The Company assesses the indemnification assets for collectibility at the acquisition level based on three sources: 1) the FDIC, 2) OREO transactions, and 3) customers. Amounts collectible from the FDIC through loss reimbursements are comprised of losses currently expected within the loss share term. A current period impairment would be recorded to the extent that events or circumstances indicate that losses previously expected to occur within the loss share term are expected to occur subsequent to loss share termination. Amounts collectible through expected gains on the sale of OREO are written-up or impaired each period based on the best available information.

Loss assumptions used to measure the basis of the indemnified loans are consistent with the loss assumptions used to measure the indemnification assets.

The indemnification asset is reduced when cash is received from the FDIC.

Allowance For Credit Losses

ALLOWANCE FOR CREDIT LOSSES

The manner in which the allowance for credit losses is determined is based on the accounting method applied to the underlying loans. The Company delineates between loans accounted for under the contractual yield method, primarily legacy loans, and loans accounted for as purchased impaired loans, primarily acquired loans.

Legacy Loans

Legacy loans represent loans accounted for under the contractual yield method. The Company’s legacy loans include loans originated by the Company and acquired loans that are not accounted for as acquired credit impaired loans.

The Legacy ACL represents management’s best estimate of probable credit losses inherent at the balance sheet date. Determination of the Legacy ACL involves a high degree of complexity and requires significant judgment. Several factors are taken into consideration in the determination of the overall Legacy ACL, including a qualitative component. These factors include, but are not limited to, the overall risk profiles of the loan portfolios, net charge-off experience, the extent of impaired loans, the level of nonaccrual loans, the level of 90 days past due loans and the overall percentage level of the allowance. The Company also considers overall asset quality trends, changes in lending and risk management practices and procedures, trends in the nature and volume of the loan portfolio, including the existence and effect of any portfolio concentrations, changes in experience and depth of lending staff, the Company’s legal, regulatory and competitive environment, national and regional economic trends, and data availability and applicability that might impact the portfolio. See the “Application of Critical Accounting Policies and Estimates” section for more information.

During 2014, the Company did not substantively change any material aspect of its overall approach in the determination of the allowance for credit losses and there have been no material changes in assumptions or estimation techniques as compared to December 31, 2013. However, during the third quarter of 2013, the Company modified its methodology for estimating its allowance for credit losses on its non-covered, non-acquired loan portfolio to incorporate practices, processes, and methodologies consistent with the guidance provided in the FRB’s inter-agency policy statement 2006 SR 06-17. The methodology was modified to segregate the reserve for unfunded lending commitments (“RULC”), previously included in the Company’s allowance for loan losses, into a separate liability on the Company’s consolidated balance sheet, and to enhance the previous methodology around loss migration.

Certain inherent, but unconfirmed losses are probable within the loan portfolio. The Company’s current methodology for determining the level of losses is based on historical loss rates, current credit grades, specific allocation and other qualitative adjustments. In a stable or deteriorating credit environment, heavy reliance on historical loss rates and the credit grade rating process results in model-derived required reserves that tend to slightly lag behind portfolio deterioration. Similar lags can occur in an improving credit environment whereby required reserves can lag slightly behind portfolio improvement. Given these model limitations, qualitative adjustment factors may be incremental or decremental to the quantitative model results.

Acquired Impaired Loans

Acquired impaired loans, which include covered loans and certain non-covered loans, represent loans acquired by the Company that are accounted for in accordance with ASC Topic 310-30.

Loans acquired in business combinations were recorded at their acquisition date fair values, which were based on expected cash flows and included estimates of expected future credit losses. Under current accounting principles, information regarding the Company’s estimates of loan fair values may be adjusted for a period of up to one year as the Company continues to refine its estimate of expected future cash flows in the acquired portfolio. If the Company discovers that it has materially underestimated the credit losses expected in the loan portfolio based on information available at the acquisition date within the purchase accounting period, it will retroactively reduce or eliminate the gain and/or increase goodwill recorded on the acquisition. If the Company determines that losses arose after the acquisition date, the additional losses will be reflected as a provision for credit losses.

At December 31, 2014, the Company had an allowance for credit losses of $45 million to reserve for expected losses currently in the covered loan portfolio and $9 million to reserve for probable losses currently in the acquired impaired loan portfolio that have arisen after the losses were estimated at the respective acquisition dates. Based on facts and circumstances available, management of the Company believes that the acquired impaired allowance for credit losses was appropriate at December 31, 2014. However, future adjustments to the allowance may be necessary, and the results of operations could be adversely affected, if circumstances differ substantially from the assumptions used by management in determining the allowance for credit losses.

Off-Balance Sheet Credit-Related Financial Instruments

OFF-BALANCE SHEET CREDIT-RELATED FINANCIAL INSTRUMENTS

The Company accounts for its guarantees in accordance with the provisions of ASC Topic 460. In the ordinary course of business, the Company has entered into commitments to extend credit, including commitments under commercial construction arrangements, commercial and home equity lines of credit, credit card arrangements, commercial letters of credit and standby letters of credit. Such financial instruments are recorded when they are funded.

Derivative Financial Instruments

DERIVATIVE FINANCIAL INSTRUMENTS

The Company enters into derivative financial instruments to manage interest rate risk, asset sensitivity, and other exposures such as liquidity and credit risk. The primary types of derivatives used by the Company include interest rate swap agreements, interest rate lock commitments, forward sales commitments, and written and purchased options. All derivative instruments are recognized on the consolidated balance sheets as other assets or other liabilities at fair value, as required by ASC Topic 815.

As part of its activities to manage interest rate risk (i.e., the exposure to the variability of future cash flows or other forecasted transactions due to fluctuating market rates), the Company enters into interest rate contracts, which typically include interest rate swap agreements. The Company primarily utilizes these instruments, which the Company designates as cash flow hedges, to convert a portion of its variable-rate loans or debt to a fixed rate. In addition to using interest rate swap agreements to manage interest rate risk, the Company also enters into derivative instruments to help its commercial customers manage their exposure to interest rate fluctuations or other customers to facilitate business transactions. To mitigate the market risk associated with these customer contracts, the Company enters into offsetting derivative contract positions. The Company manages its credit risk, or potential risk of default by its commercial customers, through credit limit approval and monitoring procedures.

Interest rate swap agreements

Interest rate swaps are agreements to exchange interest payments based upon notional amounts. The exchange of payments typically involves paying a fixed rate and receiving a variable rate or vice versa.

Interest rate lock commitments

The Company enters into commitments to originate mortgage loans intended for sale whereby the interest rate on the prospective loan is determined prior to funding (“rate lock”). A rate lock is given to a borrower, subject to conditional performance obligations, for a specified period of time that typically does not exceed 60 days. Rate lock commitments on mortgage loans that are intended to be sold are considered to be derivatives. Accordingly, such commitments are recorded at fair value as derivative assets or liabilities, with changes in fair value recorded in mortgage income on the consolidated statements of comprehensive income.

Forward sales commitments

The Company uses forward sales commitments to protect the value of its rate locks and mortgage loans held for sale from changes in interest rates and pricing between the origination of the rate lock and sale of these loans, as changes in interest rates have the potential to cause a decline in value of rate locks and mortgage loans included in the held for sale portfolio. These commitments are considered to be derivatives and are recorded at fair value as derivative assets or liabilities, with changes in fair value recorded in mortgage income on the consolidated statements of comprehensive income.

Equity-indexed certificates of deposit

IBERIABANK offers its customers a certificate of deposit that provides the purchaser a guaranteed return of principal at maturity plus potential return, which allows IBERIABANK to identify a known cost of funds. The rate of return is based on the performance of a basket of publically traded stocks that represent a variety of industry segments. Because it is based on an equity index, the rate of return represents an embedded derivative that is not clearly and closely related to the host instrument and is to be accounted for separately. Accordingly, the certificate of deposit is separated into two components: a zero coupon certificate of deposit (the host instrument) and a written option purchased by the depositor (an embedded derivative). The discount on the zero coupon deposit is amortized over the life of the deposit, and the written option is carried at fair value on the Company’s consolidated balance sheets, with changes in fair value recorded through earnings. IBERIABANK offsets the risks of the written option by purchasing an option with terms that mirror the written option and that is also carried at fair value on the Company’s consolidated balance sheets.

Derivatives Designated in Hedging Relationships

For cash flow hedges, the effective portion of the gain or loss related to the derivative instrument is initially reported as a component of other comprehensive income and subsequently reclassified into earnings when the forecasted transaction affects earnings or when the hedge is terminated. The ineffective portion of the gain or loss is reported in earnings immediately. In applying hedge accounting for derivatives, the Company establishes and documents a method for assessing the effectiveness of the hedging derivative and a measurement approach for determining the ineffective aspect of the hedge upon the inception of the hedge.

At December 31, 2014, there were no hedging relationships designated for hedge accounting purposes.

Derivatives Not Designated in Hedging Relationships

For derivative instruments that are not designated as hedging instruments, changes in the fair value of the derivatives are recognized in earnings immediately.

Premises and Equipment

PREMISES AND EQUIPMENT

Land is carried at cost. Buildings, furniture, fixtures, and equipment are carried at cost, less accumulated depreciation computed on a straight line basis over the estimated useful lives of 10 to 40 years for buildings and 3 to 15 years for furniture, fixtures and equipment. Capitalized leasehold improvements are amortized over the length of the initial lease agreement or their useful life, whichever is shorter.

Other Real Estate

OTHER REAL ESTATE

Other real estate includes all real estate, other than bank premises used in bank operations, owned or controlled by the Company, including real estate acquired in settlement of loans. Properties are recorded at the balance of the loan (which is the pro-rata carrying value of loans accounted for in accordance with ASC Topic 310-30) or at estimated fair value less estimated selling costs, whichever is less, at the date acquired. Subsequent to foreclosure, management periodically performs valuations and the assets are carried at the lower of cost or fair value less estimated selling costs. Revenue and expenses from operations, gain or loss on sale and changes in the valuation allowance are included in net expenses from foreclosed assets.

Goodwill and Other Intangible Assets

GOODWILL AND OTHER INTANGIBLE ASSETS

Goodwill

Goodwill is accounted for in accordance with ASC Topic 350, and accordingly is not amortized but is evaluated at least annually for impairment. As part of its testing, the Company first assesses qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If the results of the qualitative assessment indicate impairment, the Company determines the fair value of a reporting unit relative to its carrying amount to determine whether quantitative indicators of impairment are present. When the Company determines that the fair value of the reporting unit is below its carrying amount, the Company determines the fair value of the reporting unit’s assets and liabilities, considering deferred taxes, and then measures impairment loss by comparing the implied fair value of goodwill with the carrying amount of that goodwill.

Title Plant

The Company records its title plant assets in accordance with ASC Topic 950. Under ASC Topic 950, costs incurred to construct a title plant, including the costs incurred to obtain, organize, and summarize historical information, are capitalized until the title plant can be used to perform title searches. Purchased title plant, including a purchased undivided interest in title plant, is recorded at cost at the date of acquisition. For title plant acquired separately or as part of a company acquisition, cost is measured as the fair value of the consideration given. Capitalized costs of title plant are not depreciated or charged to income unless circumstances indicate that the carrying amount of the title plant has been impaired. Impairment identifiers include a change in legal requirements or statutory practices, identification of obsolescence, and abandonment of the title plant, among other identifiers.

Intangible assets subject to amortization

The Company’s acquired intangible assets that are subject to amortization include core deposit intangibles, amortized on a straight line or accelerated basis, and a customer relationship intangible asset, amortized on an accelerated basis over average lives not to exceed 10 years.

Transfers of Financial Assets

TRANSFERS OF FINANCIAL ASSETS

Transfers of financial assets are accounted for as sales when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when 1) the assets have been isolated from the Company, 2) the transferee obtains the right, free of conditions that constrain it from taking advantage of that right, to pledge or exchange the transferred assets, and 3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity. Should the transfer not meet these three criteria, the transaction is treated as a secured financing.

Income Taxes

INCOME TAXES

The Company and all subsidiaries file a consolidated federal income tax return on a calendar year basis. The Company files income tax returns in the U.S. federal jurisdiction and various state jurisdictions through IBERIABANK, IMC, LTC and their subsidiaries. In lieu of Louisiana state income tax, IBERIABANK is subject to the Louisiana bank shares tax, a portion of which is included in both non-interest expense and income tax expense in the Company’s consolidated statements of comprehensive income. With few exceptions, the Company is no longer subject to U.S. federal, state or local income tax examinations for years before 2011.

Deferred income tax assets and liabilities are determined using the liability (or balance sheet) method. Under this method, the net deferred tax asset or liability is determined based on the tax effects of the temporary differences between the book and tax bases of the various balance sheet assets and liabilities and gives current recognition to changes in tax rates and laws. The measurement of deferred tax assets is reduced, if necessary, by the amount of any tax benefits that, based on available evidence, are not expected to be realized.

The Company recognizes interest and penalties accrued related to unrecognized tax benefits, if applicable, in non-interest expense.

Stock Compensation Plans

STOCK COMPENSATION PLANS

The Company issues stock options and restricted stock under various plans to directors, officers and other key employees. The Company accounts for its stock compensation plans in accordance with ASC Topics 718 and 505. Under those provisions, the Company has adopted a fair value based method of accounting for employee stock compensation plans, whereby compensation cost is measured at the grant date based on the value of the award and is recognized on a straight-line basis over the service period, which is usually the vesting period, taking into account retirement eligibility. For service awards with graded vesting, the Company recognizes compensation cost on a straight-line basis. As a result, compensation expense relating to stock options and restricted stock is reflected in net income as part of “Salaries and employee benefits” on the consolidated statements of comprehensive income for employees and “Professional services” for non-employee directors. The Company’s practice has been to grant options at no less than the fair market value of the stock at the grant date.

Earnings Per Common Share

EARNINGS PER COMMON SHARE

Basic earnings per share represents income available to common shareholders divided by the weighted average number of common shares outstanding during the period. Diluted earnings per share reflect additional common shares that would have been outstanding if dilutive potential common shares, in the form of stock options, had been issued, as well as any adjustment to income that would result from the assumed issuance. Participating common shares issued by the Company relate to unvested outstanding restricted stock awards, the earnings allocated to which are used in determining income available to common shareholders under the two-class method. The two-class method allocates earnings for the period between common shareholders and other participating securities holders. The participating awards receiving dividends will be allocated the same amount of income as if they were outstanding shares.

Treasury Stock

TREASURY STOCK

The purchase of the Company’s common stock is recorded at cost. At the date of retirement or subsequent reissuance, treasury stock is reduced by the cost of such stock with differences recorded in additional paid-in capital or retained earnings, as applicable.

As of December 31, 2014, 1,809,497 shares of the Company’s common stock were classified as treasury stock in the consolidated financial statements. Effective January 1, 2015, companies incorporated in Louisiana became subject to the Louisiana Business Corporation Act (which replaced the Louisiana Business Corporation Law). Provisions of the Louisiana Business Corporation Act eliminate the concept of treasury stock and provide that shares reacquired by a company are to be treated as authorized but unissued shares. As a result of this change in law, for the consolidated financial statements beginning with the quarterly period ended March 31, 2015, the Company will begin to classify shares previously classified as treasury stock as a reduction to issued shares of common stock, and, accordingly, will adjust the stated value of common stock and paid in capital.

Comprehensive Income

COMPREHENSIVE INCOME

Accounting principles generally require that recognized revenue, expenses, gains and losses be included in net income. Although certain changes in assets and liabilities, such as unrealized gains and losses on available for sale securities and cash flow hedges, are reported as a separate component of the shareholders’ equity section of the consolidated balance sheets, such items, along with net income, are components of comprehensive income.

Fair Value Measurements

FAIR VALUE MEASUREMENTS

The Company estimates fair value based on the assumptions market participants would use when selling an asset or transferring a liability and characterizes such measurements within the fair value hierarchy based on the inputs used to develop those assumptions and measure fair value. The hierarchy requires the Company to maximize the use of observable inputs and minimize the use of unobservable inputs. The three levels of inputs used to measure fair value are as follows:

• Level 1 - Quoted prices in active markets for identical assets or liabilities.

• Level 2 - Observable inputs other than quoted prices included in Level 1, such as quoted prices for similar assets and liabilities in active markets; quoted prices for identical or similar assets and liabilities in markets that are not active; or other inputs that are observable or can be corroborated by observable market data.

• Level 3 - Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. This includes certain pricing models, discounted cash flow methodologies and similar techniques that use significant unobservable inputs.

A description of the valuation methodologies used for instruments measured at fair value follows, as well as the classification of such instruments within the valuation hierarchy.

Investment securities

Securities are classified within Level 1 where quoted market prices are available in an active market. Inputs include securities that have quoted prices in active markets for identical assets. If quoted market prices are unavailable, fair value is estimated using quoted prices of securities with similar characteristics, at which point the securities would be classified within Level 2 of the hierarchy.

Mortgage loans held for sale

Mortgage loans originated and held for sale are recorded at fair value under the fair value option, unless otherwise noted. When determining the fair value of loans held for sale, the Company obtains quotes or bids on these loans directly from the purchasing financial institutions (Level 2).

Impaired loans

Loans are measured for impairment using the methods permitted by ASC Topic 310. Fair value measurements are used in determining impairment using either the loan’s observable market price (Level 1), if available, or the fair value of the collateral if the loan is collateral dependent (Level 2). Measuring the impairment of loans using the present value of expected future cash flows, discounted at the loan’s effective interest rate, is not considered a fair value measurement. Fair value of the collateral is determined by appraisals or independent valuation.

Other real estate owned (OREO)

Fair values of OREO at December 31, 2014 are determined by sales agreement or appraisal, and costs to sell are based on estimation per the terms and conditions of the sales agreement or amounts commonly used in real estate transactions. Inputs include appraisal values on the properties or recent sales activity for similar assets in the property’s market, and thus OREO measured at fair value would be classified within Level 2 of the hierarchy. The Company included property write-downs of $3.8 million, $4.8 million, and $6.4 million in earnings as part of “Costs of OREO property, net” on the consolidated statements of comprehensive income for the years ended December 31, 2014, 2013, and 2012, respectively.

Derivative financial instruments

The Company enters into commitments to originate loans whereby the interest rate on the prospective loan is determined prior to funding. Rate locks on mortgage loans that are intended to be sold are considered to be derivatives. The Company offers its customers a certificate of deposit that provides the purchaser a guaranteed return of principal at maturity plus potential return, which allows the Company to identify a known cost of funds. The rate of return is based on an equity index, and as such represents an embedded derivative. Fair value of interest rate swaps, interest rate locks, forward sales commitments, and equity-linked written and purchased options are estimated using prices of financial instruments with similar characteristics, and thus are classified within Level 2 of the fair value hierarchy.

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Allowance for Credit Losses and Credit Quality - Schedule of Investment in Impaired Loan (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 36,560	$ 45,342
Unpaid Principal Balance	37,327	46,501
Related Allowance	(767)	(1,159)
Average Recorded Investment	39,176	49,645
Interest Income Recognized	513	587
Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	11,443	25,018
Unpaid Principal Balance	11,876	25,877
Related Allowance	(433)	(859)
Average Recorded Investment	12,851	28,823
Interest Income Recognized	251	321
Commercial Loans [Member] | With No Related Allowance Recorded [Member] | Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	6,680	8,567
Unpaid Principal Balance	6,680	8,567
Average Recorded Investment	6,703	10,443
Interest Income Recognized	132	43
Commercial Loans [Member] | With No Related Allowance Recorded [Member] | Business [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,483	13,256
Unpaid Principal Balance	2,483	13,256
Average Recorded Investment	2,873	11,074
Interest Income Recognized	57	170
Commercial Loans [Member] | With No Related Allowance Recorded [Member] | Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	682	258
Unpaid Principal Balance	682	258
Average Recorded Investment	696	281
Interest Income Recognized	19	1
Commercial Loans [Member] | With An Allowance Recorded [Member] | Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,068	1,268
Unpaid Principal Balance	1,093	1,284
Related Allowance	(25)	(16)
Average Recorded Investment	1,158	4,414
Interest Income Recognized	39	8
Commercial Loans [Member] | With An Allowance Recorded [Member] | Business [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,212	1,927
Unpaid Principal Balance	1,620	2,770
Related Allowance	(408)	(843)
Average Recorded Investment	2,117	2,892
Interest Income Recognized	23	100
Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	14,111	11,408
Unpaid Principal Balance	14,363	11,645
Related Allowance	(252)	(237)
Average Recorded Investment	14,263	9,675
Interest Income Recognized	110	98
Mortgage Loans [Member] | With An Allowance Recorded [Member] | Residential Prime [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	10,532	9,791
Unpaid Principal Balance	10,768	10,019
Related Allowance	(236)	(228)
Average Recorded Investment	10,577	8,096
Interest Income Recognized	11	98
Mortgage Loans [Member] | With An Allowance Recorded [Member] | Residential Subprime [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	3,579	1,617
Unpaid Principal Balance	3,595	1,626
Related Allowance	(16)	(9)
Average Recorded Investment	3,686	1,579
Interest Income Recognized	99
Consumer Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	11,006	8,916
Unpaid Principal Balance	11,088	8,979
Related Allowance	(82)	(63)
Average Recorded Investment	12,062	11,147
Interest Income Recognized	152	168
Consumer Loans [Member] | With An Allowance Recorded [Member] | Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	7,121	6,506
Unpaid Principal Balance	7,165	6,550
Related Allowance	(44)	(44)
Average Recorded Investment	7,544	7,593
Interest Income Recognized	43	93
Consumer Loans [Member] | With An Allowance Recorded [Member] | Indirect Automobile [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,410	1,267
Unpaid Principal Balance	1,419	1,275
Related Allowance	(9)	(8)
Average Recorded Investment	2,016	2,090
Interest Income Recognized	51	55
Consumer Loans [Member] | With An Allowance Recorded [Member] | Credit Card [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,012	404
Unpaid Principal Balance	1,032	411
Related Allowance	(20)	(7)
Average Recorded Investment	797	418
Consumer Loans [Member] | With An Allowance Recorded [Member] | Consumer - Other [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	781	481
Unpaid Principal Balance	790	485
Related Allowance	(9)	(4)
Average Recorded Investment	1,009	765
Interest Income Recognized	$ 39	$ 19

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Deposits - Schedule of Maturities of Certificates of Deposit (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Investments Schedule [Abstract]
2015	$ 1,297,125
2016	493,944
2017	171,884
2018	57,580
2019	49,967
2020 and thereafter	45,737
Total certificates of deposit and other time deposits	$ 2,116,237	$ 1,710,592

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Income Taxes

12 Months Ended

Dec. 31, 2014

Income Tax Disclosure [Abstract]

Income Taxes

NOTE 17 – INCOME TAXES

The provision for income tax expense consists of the following for the years ended December 31:

(Dollars in thousands)	2014			2013			2012
Current expense	$	69,612		$	62,468		$	44,125
Deferred benefit		(24,955	)		(35,943	)		(7,527	)
Tax credits		(12,012	)		(11,690	)		(8,756	)
Tax benefits attributable to items charged to equity and goodwill		2,105			1,034			654
	$	34,750		$	15,869		$	28,496

There was a balance receivable of $2 million and a balance payable of $8 million for federal and state income taxes at December 31, 2014 and 2013, respectively. The provision for federal income taxes differs from the amount computed by applying the federal income tax statutory rate of 35 percent on income before income tax expense as indicated in the following analysis for the years ended December 31:

(Dollars in thousands)	2014			2013			2012
Federal tax based on statutory rate	$	49,070		$	28,340		$	36,712
Increase (decrease) resulting from:
Effect of tax-exempt income		(7,064	)		(7,282	)		(7,558	)
Interest and other nondeductible expenses		2,642			2,007			1,847
State taxes, net of federal Benefit		2,531			3,237			4,938
Tax credits		(12,012	)		(11,690	)		(8,756	)
Other		(417	)		1,257			1,313
	$	34,750		$	15,869		$	28,496
Effective tax rate		24.8	%		19.6	%		27.2	%

The composition of other items resulting in a net tax benefit of $0.4 million for the year ending December 31, 2014 arose principally from an increase of $3.2 million for basis reductions associated with federal tax credits, offset by $3.6 million of other discrete items, including BOLI death benefits and prior year provision-to-return adjustments.

The net deferred tax asset at December 31 is as follows:

(Dollars in thousands)
	2014			2013
Deferred tax asset:
NOL carryforward	$	978		$	1,001
Allowance for credit losses		59,267			85,101
Deferred compensation		6,631			6,315
Basis difference in acquired assets		53,202			70,136
Unrealized loss on available for sale investments		—			8,880
OREO		9,845			31,943
Other		13,530			19,509
		143,453			222,885
Deferred tax liability:
Basis difference in acquired assets		(53,940	)		(130,426	)
Gain on acquisition		(2,426	)		(17,693	)
FHLB stock		(85	)		(36	)
Premises and equipment		(9,652	)		(10,209	)
Acquisition intangibles		(12,151	)		(12,113	)
Deferred loan costs		(3,771	)		(2,915	)
Unrealized gain on available for sale investments		(4,052	)		—
Investments acquired		(570	)		(235	)
Swap gain		(75	)		(75	)
Other		(12,908	)		(11,089	)
		(99,630	)		(184,791	)
Net deferred tax asset	$	43,823		$	38,094

The Company determined that the net deferred tax asset is more likely than not to be realized based on an assessment of all available positive and negative evidence and therefore no valuation allowance has been recorded as of December 31, 2014 or 2013.

Retained earnings at December 31, 2014 and 2013 included approximately $21.9 million accumulated prior to January 1, 1987 for which no provision for federal income taxes has been made. If this portion of retained earnings is used in the future for any purpose other than to absorb bad debts, it will be added to future taxable income.

The Company does not believe it has any unrecognized tax benefits included in its consolidated financial statements. The Company has not had any settlements in the current period with taxing authorities, nor has it recognized tax benefits as a result of a lapse of the applicable statute of limitations.

During the years ended December 31, 2014, 2013, and 2012, the Company did not recognize any interest or penalties in its consolidated financial statements, nor has it recorded a liability for interest or penalty payments.

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Acquisition and Disposition Activity - Schedule of Business Acquisitions, by Acquisition (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Trust One- Memphis [Member] | As Acquired [Member]
Business Acquisition [Line Items]
Cash and cash equivalents	$ 92,060
Loans	88,179
Other real estate owned	1,325
Other assets	368
Total Assets	181,932
Interest-bearing deposits	164,942
Non-interest-bearing deposits	26,373
Deferred tax liability	0
Other liabilities	84
Total Liabilities	191,399
Trust One- Memphis [Member] | Preliminary Fair Value Adjustments [Member]
Business Acquisition [Line Items]
Total Assets	871
Deferred tax liability	0
Trust One- Memphis [Member] | As Recorded by IBERIABANK [Member]
Business Acquisition [Line Items]
Cash and cash equivalents	92,060
Loans	86,453
Other real estate owned	1,325
Core deposit intangible	2,597
Other assets	368
Total Assets	182,803
Interest-bearing deposits	164,942
Non-interest-bearing deposits	26,373
Deferred tax liability	0
Other liabilities	84
Total Liabilities	191,399
Teche [Member] | As Acquired [Member]
Business Acquisition [Line Items]
Cash and cash equivalents	71,611
Investment securities	24,077
Loans	716,327
Other real estate owned	329
Deferred tax asset	1,057
Other assets	56,730
Total Assets	870,131
Interest-bearing deposits	520,446
Non-interest-bearing deposits	118,256
Borrowings	134,228
Other liabilities	5,376
Total Liabilities	778,306
Teche [Member] | Preliminary Fair Value Adjustments [Member]
Business Acquisition [Line Items]
Investment securities	1,092
Loans	(15,869)
Other real estate owned	(153)
Core deposit intangible	7,440
Deferred tax asset	4,835
Other assets	(5,653)
Total Assets	(8,308)
Interest-bearing deposits	902
Borrowings	6,304
Total Liabilities	7,206
Teche [Member] | As Recorded by IBERIABANK [Member]
Business Acquisition [Line Items]
Cash and cash equivalents	71,611
Investment securities	25,169
Loans	700,458
Other real estate owned	176
Core deposit intangible	7,440
Deferred tax asset	5,892
Other assets	51,077
Total Assets	861,823
Interest-bearing deposits	521,348
Non-interest-bearing deposits	118,256
Borrowings	140,532
Other liabilities	5,376
Total Liabilities	785,512
First Private [Member] | As Acquired [Member]
Business Acquisition [Line Items]
Cash and cash equivalents	26,621
Investment securities	18,920
Loans	300,177
Deferred tax asset	530
Other assets	5,148
Total Assets	351,396
Interest-bearing deposits	261,713
Non-interest-bearing deposits	50,334
Borrowings	6,451
Other liabilities	306
Total Liabilities	318,804
First Private [Member] | Preliminary Fair Value Adjustments [Member]
Business Acquisition [Line Items]
Investment securities	297
Loans	(910)
Core deposit intangible	506
Deferred tax asset	122
Total Assets	15
Interest-bearing deposits	220
Total Liabilities	220
First Private [Member] | As Recorded by IBERIABANK [Member]
Business Acquisition [Line Items]
Cash and cash equivalents	26,621
Investment securities	19,217
Loans	299,267
Core deposit intangible	506
Deferred tax asset	652
Other assets	5,148
Total Assets	351,411
Interest-bearing deposits	261,933
Non-interest-bearing deposits	50,334
Borrowings	6,451
Other liabilities	306
Total Liabilities	$ 319,024

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Premises and Equipment - Schedule of Minimum Future Annual Rent Commitments (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Property Plant and Equipment Useful Life and Values [Abstract]
2015	$ 11,541
2016	9,878
2017	8,153
2018	7,333
2019	6,214
2020 and thereafter	31,860
Total	$ 74,979

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Fair Value Measurements - Financial Assets and Liabilities Measured at Fair Value on Nonrecurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale, Assets	$ 139,950	$ 97,273
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, Assets	4,864	3,070
Mortgage loans held for sale, Assets		11,876
OREO, Assets	1,483	14,598
Total, Assets	6,347	29,544
Fair Value, Measurements, Nonrecurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, Assets	4,864	3,070
Mortgage loans held for sale, Assets		11,876
OREO, Assets	1,483	14,598
Total, Assets	$ 6,347	$ 29,544

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Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash Flows from Operating Activities
Net income	$ 105,450	$ 65,103	$ 76,395
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization, and accretion	15,791	25,388	21,685
Amortization of purchase accounting adjustments, net	7,536	(5,965)	(47,383)
Provision for loan losses	19,060	5,145	20,671
Share-based equity compensation expense	11,985	10,703	9,907
(Gain) Loss on sale of assets, net	(14)	(251)	(42)
Gain on sale of available for sale investments	(771)	(2,277)	(3,739)
Gain on sale of OREO, net	(4,221)	(6,022)	(4,985)
Loss on abandonment of fixed assets		4,941	2,743
Impairment	5,121	31,813
Amortization of premium/discount on investments	13,793	18,953	21,013
Derivative losses (gains) on swaps	1	(209)	1
Benefit for deferred income taxes	(24,955)	(35,943)	(7,527)
Originations of mortgage loans held for sale	(1,675,538)	(2,116,460)	(2,432,367)
Proceeds from sales of mortgage loans held for sale	1,716,565	2,320,885	2,388,716
Gain on sale of mortgage loans held for sale, net	(59,156)	(65,393)	(70,811)
Tax benefit associated with share-based payment arrangements	(2,105)	(886)	(1,221)
Decrease (Increase) in other assets	11,702	(17,534)	7,437
Other operating activities, net	(20,881)	77,792	7,319
Net Cash (Used in) Provided by Operating Activities	119,363	309,783	(12,188)
Cash Flows from Investing Activities
Proceeds from sales of securities available for sale	61,702	44,677	154,222
Proceeds from maturities, prepayments and calls of securities available for sale	488,699	709,977	880,425
Purchases of securities available for sale	(703,179)	(1,026,290)	(935,164)
Proceeds from maturities, prepayments and calls of securities held to maturity	36,182	55,706	43,535
Purchases of securities held to maturity		(5,901)	(57,075)
Reimbursement of recoverable covered asset losses (to) from the FDIC	5,734	68,233	157,694
Increase in loans receivable, net	(824,437)	(1,030,545)	(870,577)
Proceeds from sale of premises and equipment	5,129	8,714	1,274
Purchases of premises and equipment	(29,841)	(16,941)	(32,825)
Proceeds from disposition of real estate owned	84,429	116,612	109,067
Cash paid for additional investment in tax credit entities	(13,191)	(2,213)	(21,368)
Cash received in excess of cash paid for acquisition	188,803		32,425
Other investing activities, net	(12,785)	(2,636)	10,691
Net Cash Provided by (Used in) Investing Activities	(712,755)	(1,080,607)	(527,676)
Cash Flows from Financing Activities
Increase (decrease) in deposits, net of deposits acquired	641,026	(10,689)	1,174,829
Net change in short-term borrowings, net of borrowings acquired	110,298	377,299	(102,320)
Proceeds from long-term debt	54,637	2,867	24,086
Repayments of long-term debt	(22,871)	(144,609)	(80,770)
Dividends paid to shareholders	(43,070)	(40,332)	(40,069)
Proceeds from sale of treasury stock for stock options exercised	11,693	8,101	2,813
Payments to repurchase common stock	(3,727)	(2,280)	(42,245)
Tax benefit associated with share-based payment arrangements	2,105	886	1,221
Net Cash Provided by Financing Activities	750,091	191,243	937,545
Net Increase (Decrease) In Cash and Cash Equivalents	156,699	(579,581)	397,681
Cash and Cash Equivalents at Beginning of Period	391,396	970,977	573,296
Cash and Cash Equivalents at End of Period	548,095	391,396	970,977
Supplemental Schedule of Noncash Activities
Acquisition of real estate in settlement of loans	27,050	93,040	99,134
Common stock issued in acquisition	214,665		39,203
Transfers of property into Other Real Estate	37,273	93,040	106,427
Supplemental Disclosures Cash paid for:
Interest on deposits and borrowings	43,210	47,466	63,984
Income taxes, net	$ 52,094	$ 29,063	$ 15,957

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Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Securities held to maturity, fair values	$ 119,481	$ 152,566
Mortgage loans held for sale recorded at fair value	$ 139,950	$ 97,273
Preferred stock, par value	$ 1	$ 1
Preferred stock, shares authorized	5,000,000	5,000,000
Common stock, par value	$ 1	$ 1
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	35,262,901	31,917,385
Treasury stock, shares	1,809,497	2,130,841

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Premises and Equipment

12 Months Ended

Dec. 31, 2014

Property, Plant and Equipment [Abstract]

Premises and Equipment

NOTE 10 – PREMISES AND EQUIPMENT

Premises and equipment consisted of the following at December 31:

(Dollars in thousands)	2014			2013
Land	$	75,916		$	77,113
Buildings		232,727			217,469
Furniture, fixtures and equipment		128,388			110,663
Total premises and equipment		437,031			405,245
Accumulated depreciation		(129,872	)		(117,735	)
Total premises and equipment, net	$	307,159		$	287,510

Depreciation expense was $19.4 million, $19.6 million, and $18.3 million, for the years ended December 31, 2014, 2013, and 2012, respectively.

The Company actively engages in leasing office space available in buildings it owns. Leases have different terms ranging from monthly rental to five-year leases. For the year ended December 31, 2014, income from these leases averaged $0.1 million per month. Total lease income for the years ended December 31, 2014, 2013, and 2012 was $1.6 million, $1.5 million, and $1.6 million, respectively. Income from leases is reported as a reduction in occupancy and equipment expense. The total allocated cost of the portion of the buildings held for lease at December 31, 2014 and 2013 was $7.6 million and $9.5 million, respectively, with related accumulated depreciation of $2.4 million and $3.0 million, respectively.

The Company leases certain branch and corporate offices, land and ATM facilities through non-cancelable operating leases with terms that range from one to 50 years, with renewal options thereafter. Certain of the leases have escalation clauses and renewal options ranging from monthly renewal to 50 years. Rent expense for the years ended December 31, 2014, 2013, and 2012 totaled $10.7 million, $11.4 million, and $10.6 million, respectively.

Minimum future annual rent commitments under lease agreements for the periods indicated are as follows:

(Dollars in thousands)
2015	$	11,541
2016		9,878
2017		8,153
2018		7,333
2019		6,214
2020 and thereafter		31,860
	$	74,979

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Transfers and Servicing of Financial Assets (Including Mortgage Banking Activity) - Components of Mortgage Income (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Participating Mortgage Loans [Line Items]
Derivative settlements	$ (1)	$ 209	$ (1)
Gains on sales	59,156	65,393	70,811
Total mortgage income	51,797	64,197	78,053
Mortgage Income [Member]
Participating Mortgage Loans [Line Items]
Mortgage loans held for sale and derivatives	631	(4,822)	6,772
Derivative settlements	(8,743)	3,100
Gains on sales	59,156	65,393	70,811
Servicing and other income, net	753	526	470
Total mortgage income	$ 51,797	$ 64,197	$ 78,053

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Loans - Schedule of Modified TDRs (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Receivables [Abstract]
Extended maturities	$ 0	$ 0
Interest rate adjustment	0	0
Maturity and interest rate adjustment	0	0
Movement to or extension of interest-rate only payments	0	0
Forbearance		12,975
Other concession(s)		1,587
Total		$ 14,562

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Loans - Schedule of Carrying Amount of Loans Acquired under ASC Topic 310-10 (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Loans [Line Items]
Contractually required principal and interest at acquisition	$ 87,001
Nonaccretable difference (expected losses and foregone interest)	(6,478)
Cash flows expected to be collected at acquisition	80,523
Fair value of acquired loans at acquisition	66,675
Asc 310-10 Loan [Member]
Loans [Line Items]
Contractually required principal and interest at acquisition	1,224,635
Nonaccretable difference (expected losses and foregone interest)	(20,790)
Cash flows expected to be collected at acquisition	1,203,845
Fair value of acquired loans at acquisition	$ 1,014,903

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Deposits - Schedule of Time Deposits (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Investments Schedule [Abstract]
Time deposits less than $100,000	$ 1,035,438	$ 804,250
Time deposits greater than $100,000	1,080,799	906,342
Total certificates of deposit and other time deposits	$ 2,116,237	$ 1,710,592

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Income Taxes - Reconciliation of Effective Tax Rate (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Federal tax based on statutory rate									$ 49,070	$ 28,340	$ 36,712
Effect of tax-exempt income									(7,064)	(7,282)	(7,558)
Interest and other nondeductible expenses									2,642	2,007	1,847
State taxes, net of federal Benefit									2,531	3,237	4,938
Tax credits									(12,012)	(11,690)	(8,756)
Other									(417)	1,257	1,313
Total income tax expense	$ 9,939	$ 11,897	$ 4,750	$ 8,163	$ 9,175	$ 7,357	$ 4,213	$ (4,876)	$ 34,750	$ 15,869	$ 28,496
Effective tax rate									24.80%	19.60%	27.20%

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Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]
Fair value of guarantees under commercial and standby letters of credit	$ 1.3	$ 1.1

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Derivative Instruments and Other Hedging Activities - Effect of Hedging Instruments on Consolidated Financial Statements (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Gain (Loss) Recognized in OCI net of taxes (Effective Portion)	$ 0	$ 0
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)		(392)
Amount of Gain (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	(1)	1
Amount of Gain (Loss) Recognized in Income on Derivatives	(1)	209	(1)
Not Designated as Hedging Instruments [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	(6,451)	(1,757)
Not Designated as Hedging Instruments [Member] | Interest Rate Contracts [Member] | Other Income (Expense) [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	2,513	2,991
Not Designated as Hedging Instruments [Member] | Forward Sale Contracts [Member] | Mortgage Income [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	(3,225)	(1,716)
Not Designated as Hedging Instruments [Member] | Written and Purchased Options [Member] | Mortgage Income [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	(5,739)	(3,032)
Cash Flow Hedging [Member] | Interest Rate Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Gain (Loss) Recognized in OCI net of taxes (Effective Portion)	0	0
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)		(392)
Amount of Gain (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	$ (1)	$ 1

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Document and Entity Information (USD $) In Billions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Feb. 20, 2015	Jun. 30, 2014
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Trading Symbol	IBKC
Entity Registrant Name	IBERIABANK CORP
Entity Central Index Key	0000933141
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		33,560,780
Entity Public Float			$ 2.2

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Short-Term Borrowings - Additional Information on Short-Term Borrowings (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Debt Disclosure [Abstract]
Outstanding at December 31	$ 845,742	$ 680,344	$ 303,045
Maximum month-end outstanding balance	1,034,741	680,344	640,768
Average daily outstanding balance	$ 782,033	$ 303,352	$ 284,201
Average rate during the year	0.17%	0.16%	0.22%
Average rate at year end	0.18%	0.15%	0.22%

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Goodwill and Other Acquired Intangible Assets

12 Months Ended

Dec. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Acquired Intangible Assets

NOTE 11 – GOODWILL AND OTHER ACQUIRED INTANGIBLE ASSETS

Goodwill

Changes to the carrying amount of goodwill by reporting unit for the years ended December 31, 2014 and 2013 are provided in the following table.

(Dollars in thousands)	IBERIABANK		IMC		LTC		Total
Balance, December 31, 2012	$	373,905	$	23,178	$	4,789	$	401,872
Goodwill acquired during the year		—		—		—		—
Balance, December 31, 2013		373,905	$	23,178	$	4,789		401,872
Goodwill acquired during the year		115,278		—		376		115,654
Balance, December 31, 2014	$	489,183	$	23,178	$	5,165	$	517,526

The goodwill acquired in 2014 was a result of the Trust One-Memphis, Teche, First Private, The Title Company, LLC and Louisiana Abstract and Title, LLC acquisitions. See Note 4 for further information.

The Company performed the required annual goodwill impairment test as of October 1, 2014. The Company’s annual impairment test did not indicate impairment in any of the Company’s reporting units as of the testing date. Subsequent to the testing date, management has evaluated the events and changes that could indicate that goodwill might be impaired and concluded that a subsequent test is not required.

Prior to 2012, the Company recognized goodwill impairment of $9.7 million at the Company’s LTC reporting unit based on a decrease in operating revenue and income, which resulted in the conclusion that the fair value of LTC may have been reduced below its carrying amount.

Title Plant

The Company held title plant assets recorded in “Other assets” on the consolidated balance sheets totaling $6.7 million at both December 31, 2014 and 2013, respectively. No events or changes in circumstances occurred during 2014 or 2013 to suggest the carrying value of the title plant was not recoverable.

Intangible assets subject to amortization

Definite-lived intangible assets had the following carrying values included in “Other assets” on the Company’s consolidated balance sheets as of December 31:

	2014							2013
(Dollars in thousands)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Core deposit intangibles	$	55,949	$	(36,354	)	$	19,595	$	45,406	$	(30,784	)	$	14,622
Customer relationship intangible asset		1,348		(822	)		526		1,348		(631	)		717
Non-compete agreement		163		(82	)		81		—		—			—
Other intangible assets		205		(46	)		159		—		—			—
Total	$	57,665	$	(37,304	)	$	20,361	$	46,754	$	(31,415	)	$	15,339

The related amortization expense of intangible assets is as follows:

(Dollars in thousands)	Amount
Aggregate amortization expense for the years ended December 31:
2012	$	5,150
2013		4,720
2014		5,807
Estimated amortization expense for the years ended December 31:
2015	$	5,646
2016		5,187
2017		3,586
2018		2,597
2019		1,877
2020 and thereafter		1,468

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Quarterly Results of Operations and Selected Cash Flow Data (Unaudited) - Schedule of Error Corrections and Prior Period Adjustments Effect on Statements of Comprehensive Income (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		12 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interim Reporting [Line Items]
Net interest income	$ 121,751	$ 109,273	$ 460,111	$ 390,244	$ 381,750
Non-interest income	47,112	43,761	173,628	168,958	175,997
Non-interest expense	120,360	127,309	474,479	473,085	432,185
Income tax expense	11,897	4,750	34,750	15,869	28,496
Net income	30,892	16,227	105,450	65,103	76,395
Earnings per share - Basic	$ 0.93	$ 0.53	$ 3.32	$ 2.20	$ 2.59
Earnings per share - Diluted	$ 0.92	$ 0.53	$ 3.30	$ 2.20	$ 2.59
As Previously Reported [Member]
Interim Reporting [Line Items]
Net interest income	121,041	108,979
Non-interest income	45,663	47,963
Non-interest expense	120,060	127,375
Income tax expense	11,186	6,271
Net income	29,744	18,548
Earnings per share - Basic	$ 0.89	$ 0.60
Earnings per share - Diluted	$ 0.89	$ 0.60
Error Correction Adjustment [Member]
Interim Reporting [Line Items]
Non-interest income	1,487	(4,189)
Non-interest expense	170	(170)
Income tax expense	521	(1,656)
Net income	796	(2,363)
Earnings per share - Basic	$ 0.03	$ (0.07)
Earnings per share - Diluted	$ 0.02	$ (0.07)
Purchase Accounting Adjustments [Member]
Interim Reporting [Line Items]
Net interest income	710	294
Non-interest income	(38)	(13)
Non-interest expense	130	104
Income tax expense	190	135
Net income	$ 352	$ 42
Earnings per share - Basic	$ 0.01
Earnings per share - Diluted	$ 0.01

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Investment Securities - Schedule of Realized Gains and Losses from Sale of Securities Classified as Available for Sale (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Investments, Debt and Equity Securities [Abstract]
Realized gains									$ 863	$ 2,387	$ 3,754
Realized losses									(92)	(110)	(15)
Net realized gains (losses)	$ 164	$ 582	$ 8	$ 19	$ 19	$ 13	$ (57)	$ 2,359	$ 771	$ 2,277	$ 3,739

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Loans - Summary of Changes in Accretable Yields of Acquired Loans (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at beginning of period	$ 354,892	$ 356,393	$ 470,811
Acquisition	13,848		24,089
Transfers from nonaccretable difference to accretable yield	25,844	50,743	(59,658)
Accretion	(103,233)	(179,456)	(249,309)
Changes in expected cash flows not affecting nonaccretable differences	(3,700)	127,212	170,460
Balance at end of period	287,651	354,892	356,393
Acquired Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at beginning of period	78,349	76,623	83,834
Acquisition	12,312		1,190
Transfers from nonaccretable difference to accretable yield	4,405	7,849	(11,816)
Accretion	(15,095)	(16,273)	(30,417)
Changes in expected cash flows not affecting nonaccretable differences	(5,722)	10,150	33,832
Balance at end of period	74,249	78,349	76,623
Acquired Performing Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at beginning of period	276,543	279,770	386,977
Acquisition	1,536		22,899
Transfers from nonaccretable difference to accretable yield	21,439	42,894	(47,842)
Accretion	(88,138)	(163,183)	(218,892)
Changes in expected cash flows not affecting nonaccretable differences	2,022	117,062	136,628
Balance at end of period	$ 213,402	$ 276,543	$ 279,770

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Consolidated Statements of Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest and Dividend Income
Loans, including fees	$ 526,706	$ 488,936	$ 513,936
Mortgage loans held for sale, including fees	5,153	5,108	5,318
Investment securities:
Taxable interest	38,815	31,562	33,890
Tax-exempt interest	5,862	6,668	7,375
Amortization of FDIC loss share receivable	(74,617)	(97,849)	(118,100)
Other	2,896	2,772	2,781
Total interest and dividend income	504,815	437,197	445,200
Interest Expense
NOW and MMDA	18,483	18,933	23,936
Savings	325	309	573
Time deposits	14,282	16,604	24,855
Short-term borrowings	1,364	490	650
Long-term debt	10,250	10,617	13,436
Total interest expense	44,704	46,953	63,450
Net interest income	460,111	390,244	381,750
Provision for loan losses	19,060	5,145	20,671
Net interest income after provision for loan losses	441,051	385,099	361,079
Non-interest Income
Service charges on deposit accounts	35,573	28,871	26,852
Mortgage income	51,797	64,197	78,053
Title revenue	20,492	20,526	20,987
ATM/debit card fee income	12,023	9,510	8,978
Income from bank owned life insurance	5,473	3,647	3,680
Gain on sale of available for sale investments	771	2,277	3,739
Derivative losses reclassified from other comprehensive income		(391)	(1,618)
Broker commissions	18,783	16,333	13,446
Other income	28,716	23,988	21,880
Total non-interest income	173,628	168,958	175,997
Non-interest Expense
Salaries and employee benefits	259,086	244,981	233,777
Net occupancy and equipment	59,571	58,037	54,672
Impairment of FDIC loss share receivables and other long-lived assets	6,437	37,893	2,902
Communication and delivery	12,029	12,024	12,671
Marketing and business development	11,707	10,143	12,546
Data processing	27,249	17,853	15,590
Amortization of acquisition intangibles	5,807	4,720	5,150
Professional services	18,975	18,217	21,095
Costs of OREO property, net	2,748	1,943	6,352
Credit and other loan related expense	13,692	15,931	18,095
Insurance	14,359	11,272	10,771
Travel and entertainment	9,033	8,126	9,563
Other expenses	33,786	31,945	29,001
Total non-interest expense	474,479	473,085	432,185
Income (loss) before income taxes	140,200	80,972	104,891
Income tax expense	34,750	15,869	28,496
Net income	105,450	65,103	76,395
Income Available to Common Shareholders - Basic	105,450	65,103	76,395
Earnings Allocated to Unvested Restricted Stock	(1,685)	(1,209)	(1,437)
Earnings Available to Common Shareholders - Diluted	103,765	63,894	74,958
Earnings per common share - Basic	$ 3.32	$ 2.20	$ 2.59
Earnings per common share - Diluted	$ 3.30	$ 2.20	$ 2.59
Cash dividends declared per common share	$ 1.36	$ 1.36	$ 1.36
Unrealized gains on securities:
Unrealized holding gains (losses) arising during the period	37,719	(62,095)	2,174
Reclassification adjustment for gains included in net income	(771)	(2,277)	(3,739)
Unrealized gain (loss) on securities, before tax	36,948	(64,372)	(1,565)
Fair value of derivative instruments designated as cash flow hedges:
Change in fair value of derivative instruments designated as cash flow hedges during the period		953	(22)
Reclassification adjustment for losses included in net income		391	1,618
Fair value of derivative instruments designated as cash flow hedges, before tax		1,344	1,596
Other comprehensive income (loss), before tax	36,948	(63,028)	31
Income tax expense (benefit) related to items of other comprehensive (loss) income	12,932	(22,060)	11
Other comprehensive income (loss), net of tax	24,016	(40,968)	20
Comprehensive income	$ 129,466	$ 24,135	$ 76,415

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Investment Securities

12 Months Ended

Dec. 31, 2014

Investments, Debt and Equity Securities [Abstract]

Investment Securities

NOTE 5 – INVESTMENT SECURITIES

The amortized cost and fair values of investment securities, with gross unrealized gains and losses, consist of the following:

	December 31, 2014
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	317,386	$	1,700	$	(3,533	)	$	315,553
Obligations of state and political obligations		86,513		3,679		(2	)		90,190
Mortgage-backed securities		1,741,917		16,882		(7,184	)		1,751,615
Other securities		1,460		35		—			1,495
Total securities available for sale	$	2,147,276	$	22,296	$	(10,719	)	$	2,158,853
Securities held to maturity:
U.S. Government-sponsored enterprise obligations	$	10,000	$	88	$	—		$	10,088
Obligations of state and political obligations		77,597		3,153		(145	)		80,605
Mortgage-backed securities		29,363		151		(726	)		28,788
Total securities held to maturity	$	116,960	$	3,392	$	(871	)	$	119,481
	December 31, 2013
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	406,092	$	1,382	$	(11,913	)	$	395,561
Obligations of state and political obligations		105,300		2,435		(256	)		107,479
Mortgage-backed securities		1,450,194		10,031		(27,947	)		1,432,278
Other securities		1,460		19		—			1,479
Total securities available for sale	$	1,963,046	$	13,867	$	(40,116	)	$	1,936,797
Securities held to maturity:
U.S. Government-sponsored enterprise obligations	$	34,478	$	484	$	—		$	34,962
Obligations of state and political obligations		84,290		1,463		(1,624	)		84,129
Mortgage-backed securities		35,341		258		(2,124	)		33,475
Total securities held to maturity	$	154,109	$	2,205	$	(3,748	)	$	152,566

At December 31, 2014, the Company’s exposure to two investment security issuers individually exceeded 10% of shareholders’ equity:

(Dollars in thousands)	Amortized Cost		Market Value
Federal National Mortgage Association (Fannie Mae)	$	1,220,841	$	1,226,654
Federal Home Loan Mortgage Corporation (Freddie Mac)		707,592		706,514
	$	1,928,433	$	1,933,168

Securities with carrying values of $1.4 billion and $1.5 billion were pledged to secure public deposits and other borrowings at December 31, 2014 and 2013, respectively.

Information pertaining to securities with gross unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous loss position, is as follows:

	December 31, 2014
	Less Than Twelve Months					Over Twelve Months					Total
	Gross			Estimated		Gross			Estimated		Gross			Estimated
	Unrealized			Fair		Unrealized			Fair		Unrealized			Fair
(Dollars in thousands)	Losses			Value		Losses			Value		Losses			Value
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	—		$	—	$	(3,533	)	$	240,498	$	(3,533	)	$	240,498
Obligations of state and political obligations		(2	)		185		—			—		(2	)		185
Mortgage-backed securities		(1,189	)		304,686		(5,995	)		294,549		(7,184	)		599,235
Total securities available for sale	$	(1,191	)	$	304,871	$	(9,528	)	$	535,047	$	(10,719	)	$	839,918
Securities held to maturity:
Obligations of state and political obligations	$	(9	)	$	2,287	$	(136	)	$	8,590	$	(145	)	$	10,877
Mortgage-backed securities		—			—		(726	)		20,812		(726	)		20,812
Total securities held to maturity	$	(9	)	$	2,287	$	(862	)	$	29,402	$	(871	)	$	31,689
	December 31, 2013
	Less Than Twelve Months					Over Twelve Months					Total
	Gross			Estimated		Gross			Estimated		Gross			Estimated
	Unrealized			Fair		Unrealized			Fair		Unrealized			Fair
(Dollars in thousands)	Losses			Value		Losses			Value		Losses			Value
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	(11,764	)	$	298,515	$	(149	)	$	5,515	$	(11,913	)	$	304,030
Obligations of state and political obligations		(30	)		2,415		(226	)		1,047		(256	)		3,462
Mortgage-backed securities		(23,749	)		864,899		(4,198	)		81,870		(27,947	)		946,769
Total securities available for sale	$	(35,543	)	$	1,165,829	$	(4,573	)	$	88,432	$	(40,116	)	$	1,254,261
Securities held to maturity:
Obligations of state and political obligations	$	(1,181	)	$	29,355	$	(443	)	$	6,240	$	(1,624	)	$	35,595
Mortgage-backed securities		(952	)		12,913		(1,172	)		11,616		(2,124	)		24,529
Total securities held to maturity	$	(2,133	)	$	42,268	$	(1,615	)	$	17,856	$	(3,748	)	$	60,124

The Company assessed the nature of the losses in its portfolio as of December 31, 2014 and 2013 to determine if there are losses that should be deemed other-than-temporary. In its analysis of these securities, management considered numerous factors to determine whether there were instances where the amortized cost basis of the debt securities would not be fully recoverable, including, but not limited to:

• The length of time and extent to which the estimated fair value of the securities was less than their amortized cost,

• Whether adverse conditions were present in the operations, geographic area, or industry of the issuer,

• The payment structure of the security, including scheduled interest and principal payments, including the issuer’s failures to make scheduled payments, if any, and the likelihood of failure to make scheduled payments in the future,

• Changes to the rating of the security by a rating agency, and

• Subsequent recoveries or additional declines in fair value after the balance sheet date.

Management believes it has considered these factors, as well as all relevant information available, when determining the expected future cash flows of the securities in question. Except for the particular municipal bond discussed below, in each instance, management has determined the cost basis of the securities would be fully recoverable. Management also has the intent to hold debt securities until their maturity or anticipated recovery if the security is classified as available for sale. In addition, management does not believe the Company will be required to sell debt securities before the anticipated recovery of the amortized cost basis of the security.

At December 31, 2014, 112 debt securities had unrealized losses of 1.31% of the securities’ amortized cost basis. At December 31, 2013, 207 debt securities had unrealized losses of 3.23% of the securities’ amortized cost basis. The unrealized losses for each of the securities related to market interest rate changes. Additional information on securities that have been in a continuous loss position for over twelve months at December 31 is presented in the following table.

(Dollars in thousands)	2014		2013
Number of securities
Issued by Fannie Mae, Freddie Mac, or Ginnie Mae		66		20
Issued by political subdivisions		5		5
		71		25
Amortized Cost Basis
Issued by Fannie Mae, Freddie Mac, or Ginnie Mae	$	566,113	$	104,520
Issued by political subdivisions		8,727		7,956
	$	574,840	$	112,476
Unrealized Loss
Issued by Fannie Mae, Freddie Mac, or Ginnie Mae	$	10,254	$	5,519
Issued by political subdivisions		136		669
	$	10,390	$	6,188

The Fannie Mae, Freddie Mac, and Ginnie Mae securities are rated AA+ by S&P and Aaa by Moodys. Five of the securities in a continuous loss position for over twelve months were issued by political subdivisions. The securities issued by political subdivisions have credit ratings by S&P ranging from A+ to AAA and credit ratings from Moody’s ranging from A2 to Aaa.

Prior to 2012, management assessed the operating environment of a bond issuer as adverse and concluded that the Company had one unrated revenue municipal bond that warranted an other-than-temporary impairment charge. The specific impairment was related to the loss of the contracted revenue source required for bond repayment. The Company determined the impairment charge using observable market data for similar assets, including third party valuation of the security, as well as information from unobservable inputs, including its best estimate of the recoverability of the amortized cost of the security as outlined above. The Company recorded total impairment of 50% of the par value of the bond and provided a fair value of the bond that was consistent with current market pricing. During the third quarter of 2014, the Company sold the municipal bond and recorded a gain of $0.6 million in the Company’s consolidated statements of comprehensive income for the year ended December 31, 2014. The following table reflects activity during the years ended December 31, 2014, 2013, and 2012 related to credit losses on the other-than-temporarily impaired investment security where a portion of the unrealized loss was recognized in comprehensive income.

(Dollars in thousands)	2014			2013			2012
Balance at beginning of period	$	(1,273	)	$	(1,273	)	$	(1,273	)
Credit losses on securities not previously considered other-than-temporarily impaired		—			—			—
Credit losses on securities for which OTTI was previously recognized		—			—			—
Reduction for securities sold/settled during the period		1,273			—			—
Balance at end of period	$	—		$	(1,273	)	$	(1,273	)

As a result of the Company’s analysis, no declines in the estimated fair value of the Company’s investment securities were deemed to be other-than-temporary at December 31, 2014 or 2013.

The amortized cost and estimated fair value of investment securities by maturity at December 31, 2014 are shown in the following table. Securities are classified according to their contractual maturities without consideration of principal amortization, potential prepayments or call options. Accordingly, actual maturities may differ from contractual maturities. Weighted average yields are calculated on the basis of the yield to maturity based on the amortized cost of each security.

	Securities Available for Sale							Securities Held to Maturity
(Dollars in thousands)	Weighted Average Yield			Amortized Cost		Estimated Fair Value		Weighted Average Yield			Amortized Cost		Estimated Fair Value
Within one year or less		1.54	%	$	14,643	$	14,764		2.65	%	$	10,000	$	10,088
One through five years		1.73			241,231		241,796		2.78			13,858		14,191
After five through ten years		2.15			425,233		429,973		3.10			20,945		21,729
Over ten years		2.20			1,466,169		1,472,320		2.86			72,157		73,473
		2.13	%	$	2,147,276	$	2,158,853		2.87	%	$	116,960	$	119,481

The following is a summary of realized gains and losses from the sale of securities classified as available for sale. Gains or losses on securities sold are recorded on the trade date, using the specific identification method.

	Years Ended December 31
(Dollars in thousands)	2014			2013			2012
Realized gains	$	863		$	2,387		$	3,754
Realized losses		(92	)		(110	)		(15	)
	$	771		$	2,277		$	3,739

In addition to the gains above, the Company realized certain immaterial gains on calls of held to maturity securities.

Other Equity Securities

The Company included the following securities in “Other assets” on the consolidated balance sheets at December 31:

(Dollars in thousands)	2014		2013
Federal Home Loan Bank (FHLB) stock	$	38,476	$	24,369
Federal Reserve Bank (FRB) stock		34,348		28,098
Other investments		1,306		1,306
	$	74,130	$	53,773

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Acquisition and Disposition Activity

12 Months Ended

Dec. 31, 2014

Business Combinations [Abstract]

Acquisition and Disposition Activity

NOTE 4 –ACQUISITION AND DISPOSITION ACTIVITY

Completed Acquisitions

Acquisition of Certain Assets and Liabilities of Trust One Bank

On January 17, 2014, IBERIABANK acquired certain assets and assumed certain liabilities of the Memphis, Tennessee operations of Trust One Bank, a division of Synovus Bank. Under terms of the agreement, IBERIABANK received $91.6 million in cash to acquire four Trust One-Memphis branches in the Memphis, Tennessee market, which resulted in goodwill of $8.6 million. With this acquisition, IBERIABANK expanded its presence in the Memphis, Tennessee MSA through the addition of four branches and an experienced in-market team that enhances IBERIABANK’s ability to compete in that market.

Acquisition of Teche Holding Company

On May 31, 2014, the Company acquired Teche, the holding company of Teche Federal Bank, a New Iberia, Louisiana-based commercial bank servicing south Louisiana. Under terms of the agreement, for each share of Teche stock outstanding, Teche shareholders received 1.162 shares of the Company’s common stock, as well as a cash payment for any fractional share and unexercised options to purchase Teche common stock. The Company acquired all of the outstanding common stock of the former Teche shareholders for total consideration of $156.7 million, which resulted in goodwill of $80.4 million, as shown in the table below. With this acquisition, IBERIABANK expanded its presence in the Acadiana region of Louisiana through the addition of 20 branches and an experienced in-market team that enhances IBERIABANK’s ability to compete in that market. The Company projects cost savings will be recognized in future periods through the elimination of redundant operations. The following summarizes consideration paid and a preliminary allocation of purchase price to net assets acquired.

(Dollars in thousands)	Number of Shares		Amount
Equity consideration
Common stock issued		2,498,007	$	156,026
Total equity consideration				156,026
Non-Equity consideration
Cash				714
Total consideration paid				156,740
Fair value of net assets assumed including identifiable intangible assets				76,311
Goodwill			$	80,429

Acquisition of First Private Holdings, Inc.

On June 30, 2014, the Company acquired First Private, the holding company of First Private Bank of Texas, a Dallas, Texas-based commercial bank with four branch locations, including two mobile branches. Under terms of the agreement, for each share of First Private stock outstanding, First Private shareholders received 0.27 of a share of the Company’s common stock, as well as a cash payment for any fractional share. The Company acquired all of the outstanding common stock of the former First Private shareholders for total consideration of $58.6 million, which resulted in goodwill of $26.3 million, as shown in the table below. With this acquisition, IBERIABANK expanded its presence into the Dallas, Texas MSA through the addition of branches and an experienced in-market team. The Company projects cost savings will be recognized in future periods through the elimination of redundant operations. The following summarizes consideration paid and a preliminary allocation of purchase price to net assets acquired.

(Dollars in thousands)	Number of Shares		Amount
Equity consideration
Common stock issued		847,509	$	58,639
Total equity consideration				58,639
Non-Equity consideration
Cash				1
Total consideration paid				58,640
Fair value of net assets assumed including identifiable intangible assets				32,387
Goodwill			$	26,253

The Company accounted for the aforementioned business combinations under the acquisition method in accordance with ASC Topic 805. Accordingly, the purchase price is allocated to the fair value of the assets acquired and liabilities assumed as of the date of acquisition. The following purchase price allocations on these acquisitions are preliminary and will be finalized upon the receipt of final valuations on certain assets and liabilities. Upon receipt of final fair value estimates, which must be within one year of the acquisition dates, the Company will make any final adjustments to the purchase price allocation and retrospectively adjust any goodwill recorded. Material adjustments to acquisition date estimated fair values would be recorded in the period in which the acquisition occurred, and as a result, previously reported results are subject to change. Information regarding the Company’s loan discount and related deferred tax asset, core deposit intangible asset and related deferred tax liability, as well as income taxes payable and the related deferred tax balances recorded in the acquisitions may be adjusted as the Company refines its estimates. Determining the fair value of assets and liabilities, particularly illiquid assets and liabilities, is a complicated process involving significant judgment regarding estimates and assumptions used to calculate estimated fair value. Fair value adjustments based on updated estimates could materially affect the goodwill recorded on the acquisition. The Company may incur losses on the acquired loans that are materially different from losses the Company originally projected.

The acquired assets and liabilities, as well as the preliminary adjustments to record the assets and liabilities at their estimated fair values, are presented in the following tables.

Trust One- Memphis	As Acquired		Preliminary Fair Value Adjustments			As recorded by IBERIABANK
(Dollars in thousands)
Assets
Cash and cash equivalents	$	92,060	$	—		$	92,060
Loans		88,179		(1,726	) (1)		86,453
Other real estate owned		1,325		—			1,325
Core deposit intangible		—		2,597	(2)		2,597
Other assets		368		—			368
Total Assets	$	181,932	$	871		$	182,803
Liabilities
Interest-bearing deposits	$	164,942	$	—		$	164,942
Non-interest-bearing deposits		26,373		—			26,373
Deferred tax liability		—		—			—
Other liabilities		84		—			84
Total Liabilities	$	191,399	$	—		$	191,399

Explanation of certain fair value adjustments:

⁽¹⁾  The amount represents the adjustment of the book value of Trust One-Memphis loans to their estimated fair value based on current interest rates and expected cash flows, which includes estimates of expected credit losses inherent in the portfolio.

⁽²⁾  The amount represents the fair value of the core deposit intangible asset created in the acquisition.

Teche	As Acquired		Preliminary Fair Value Adjustments			As recorded by IBERIABANK
(Dollars in thousands)
Assets
Cash and cash equivalents	$	71,611	$	—		$	71,611
Investment securities		24,077		1,092	(1)		25,169
Loans		716,327		(15,869	) (2)		700,458
Other real estate owned		329		(153	) (3)		176
Core deposit intangible		—		7,440	(4)		7,440
Deferred tax asset		1,057		4,835	(5)		5,892
Other assets		56,730		(5,653	) (6)		51,077
Total Assets	$	870,131	$	(8,308	)	$	861,823
Liabilities
Interest-bearing deposits	$	520,446	$	902	(7)	$	521,348
Non-interest-bearing deposits		118,256		—			118,256
Borrowings		134,228		6,304	(8)		140,532
Other liabilities		5,376		—			5,376
Total Liabilities	$	778,306	$	7,206		$	785,512

Explanation of certain fair value adjustments:

⁽¹⁾  The amount represents the adjustment of the book value of Teche’s investments to their estimated fair value based on fair values on the date of acquisition.

⁽²⁾  The amount represents the adjustment of the book value of Teche loans to their estimated fair value based on current interest rates and expected cash flows, which includes estimates of expected credit losses inherent in the portfolio.

⁽³⁾  The amount represents the adjustment to the book value of Teche’s OREO to their estimated fair value on the date of acquisition.

⁽⁴⁾  The amount represents the fair value of the core deposit intangible asset created in the acquisition.

⁽⁵⁾  The amount represents the deferred tax asset recognized on the fair value adjustment of Teche acquired assets and assumed liabilities.

⁽⁶⁾  The amount represents the adjustment of the book value of Teche’s property, equipment, and other assets to their estimated fair value at the acquisition date based on their appraised value, as well as the fair value of mortgage servicing rights created in the acquisition.

⁽⁷⁾  The adjustment is necessary because the weighted average interest rate of Teche’s deposits exceeded the cost of similar funding at the time of acquisition. The fair value adjustment will be amortized to reduce future interest expense over the life of the portfolio, which is estimated at 85 months.

⁽⁸⁾  The adjustment represents the adjustment of the book value of Teche’s borrowings to their estimated fair value based on current interest rates and the credit characteristics inherent in the liability.

First Private	As Acquired		Preliminary Fair Value Adjustments			As recorded by IBERIABANK
(Dollars in thousands)
Assets
Cash and cash equivalents	$	26,621	$	—		$	26,621
Investment securities		18,920		297	(1)		19,217
Loans		300,177		(910	) (2)		299,267
Other real estate owned		—		—			—
Core deposit intangible		—		506	(3)		506
Deferred tax asset		530		122	(4)		652
Other assets		5,148		—			5,148
Total Assets	$	351,396	$	15		$	351,411
Liabilities
Interest-bearing deposits	$	261,713	$	220	(5)	$	261,933
Non-interest-bearing deposits		50,334		—			50,334
Borrowings		6,451		—			6,451
Other liabilities		306		—			306
Total Liabilities	$	318,804	$	220		$	319,024

Explanation of certain fair value adjustments:

⁽¹⁾  The amount represents the adjustment of the book value of First Private’s investments to their estimated fair value based on fair values on the date of acquisition.

⁽²⁾  The amount represents the adjustment of the book value of First Private loans to their estimated fair value based on current interest rates and expected cash flows, which includes estimates of expected credit losses inherent in the portfolio.

⁽³⁾  The amount represents the fair value of the core deposit intangible asset created in the acquisition.

⁽⁴⁾  The amount represents the deferred tax asset recognized on the fair value adjustment of First Private acquired assets and assumed liabilities.

⁽⁵⁾  The adjustment is necessary because the weighted average interest rate of First Private’s deposits exceeded the cost of similar funding at the time of acquisition. The fair value adjustment will be amortized to reduce future interest expense over the life of the portfolio, which is estimated at 39 months.

Acquisitions of LTC

On February 24, 2014, the Company’s subsidiary, LTC, acquired The Title Company, LLC. Under terms of the agreement, LTC paid $0.4 million in cash to acquire a title office in Baton Rouge, Louisiana, which resulted in goodwill of $0.2 million.

On May 1, 2014, LTC acquired Louisiana Abstract and Title, LLC. Under terms of the agreement, LTC paid $0.2 million in cash to acquire a title office in Shreveport, Louisiana, which resulted in goodwill of $0.2 million. In addition, the agreement provides for potential additional cash consideration based on earnings over a four-year period after the acquisition.

The acquisitions were accounted for under the acquisition method of accounting in accordance with ASC Topic 805. Purchased assets were recorded at their acquisition date fair values. Identifiable intangible assets were recorded at fair value. Because the consideration paid, including contingent consideration, was greater than the fair value of the acquired net assets, the Company recorded goodwill as part of the acquisitions. The goodwill recognized was the result of LTC’s expanded presence into the Baton Rouge and Shreveport Louisiana MSAs and experienced in-market teams that enhance its ability to compete in those markets. As part of the acquisitions, LTC also acquired or created the following other assets:

(Dollars in thousands)	The Title Company LLC		Louisiana Abstract and Title LLC
Goodwill	$	221	$	155
Non-compete agreement		63		100
Title plant		14		9
Other intangible assets		75		130
Other assets		3		6
Total Assets	$	376	$	400

Pending Acquisitions

Acquisition of Florida Bank Group, Inc.

During the fourth quarter of 2014, the Company announced the signing of a definitive agreement pursuant to which IBERIABANK will acquire Florida Bank Group, Inc. (“Florida Bank Group”). The proposed acquisition of Florida Bank Group has been approved by the Board of Directors of each company, Florida Bank Group’s shareholders, and the Company’s regulators, and closed on February 28, 2015.

Under the terms of the agreement, Florida Bank Group shareholders will receive a combination of cash and shares of the Company’s common stock. Florida Bank Group shareholders will receive cash equal to $7.81 per share of then outstanding Florida Bank Group common stock, including shares of preferred stock that will convert to common shares in the acquisition. Each Florida Bank Group common share will be exchanged for 0.149 share of the Company’s common stock. All unexercised Florida Bank Group stock options, whether or not vested, will be cashed out.

Acquisition of Old Florida Bancshares, Inc.

During the fourth quarter of 2014, the Company announced the signing of a definitive agreement pursuant to which IBERIABANK will acquire Old Florida Bancshares, Inc. (“Old Florida”), holding company of Old Florida Bank and New Traditions Bank. The proposed acquisition has been approved by the Board of Directors of each company, Old Florida’s shareholders, and the Company’s regulators, and is expected to close on March 31, 2015.

Under the terms of the agreement, Old Florida shareholders will receive 0.34 share of the Company’s common stock for each of the Old Florida common stock shares outstanding, subject to certain market price adjustments provided for in the agreement. All unexercised Old Florida stock options, whether or not vested, will be cashed out.

Acquisition of Georgia Commerce Bancshares, Inc.

During the fourth quarter of 2014, the Company announced the signing of a definitive agreement pursuant to which IBERIABANK will acquire Georgia Commerce Bancshares, Inc. (“Georgia Commerce”), holding company of Georgia Commerce Bank. The proposed acquisition has been approved by the Board of Directors of each company and the Company’s regulators and is expected to close in the first half of 2015, subject to customary closing conditions, including the receipt of the approval of Georgia Commerce’s shareholders.

Supplemental unaudited pro forma information

The following unaudited pro forma information for the year ended December 31, 2013 reflects the Company’s estimated consolidated results of operations as if the acquisitions of Trust One-Memphis, Teche, and First Private occurred at January 1, 2013, unadjusted for potential cost savings and preliminary purchase price adjustments.

(Dollars in thousands, except per share data)	2013		2012
Interest and non-interest income	$	669,607	$	687,279
Net income		74,624		86,473
Earnings per share - basic		2.26		2.63
Earnings per share - diluted		2.26		2.63

The Company’s consolidated financial statements as of and for the year ended December 31, 2014 include the operating results of the acquired assets and assumed liabilities for the days subsequent to the respective acquisition dates. Due to the system conversion of the acquired entities throughout the current year and subsequent integration of the operating activities of the acquired branches into existing Company markets, historical reporting for the former Trust One-Memphis, Teche, and First Private branches is impracticable and thus disclosure of the revenue from the assets acquired and income before income taxes is impracticable for the period subsequent to acquisition.

Under the terms of the agreement, Georgia Commerce shareholders will receive 0.6134 share of the Company’s common stock for each of the Georgia Commerce common stock shares outstanding, subject to certain market price adjustments provided for in the agreement. All unexercised Georgia Commerce stock options, whether or not vested, will be cashed out.

Branch Dispositions

In 2012, the Company closed ten branches as part of its ongoing business strategy, which includes a periodic review of its branch network to maximize shareholder return. In 2013, the Company closed or consolidated an additional 14 branches. As part of these branch closures, the Company incurred various disposal costs during the years ended December 31, 2013 and 2012, including personnel termination costs, contract termination costs, and fixed asset disposals. The following table shows the costs the Company incurred that are included in its consolidated statements of comprehensive income for the years indicated. Costs associated with branch dispositions for the year ended December 31, 2014 were immaterial.

	For the Years Ended December 31
(Dollars in thousands)	2013		2012
Employee termination	$	299	$	477
Accelerated depreciation		1,033		576
Contract termination		659		20
Impairment		4,941		2,743
	$	6,932	$	3,816

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Share-Based Compensation - Schedule of Share and Dividend Equivalent Share Award Activity (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Number of share equivalents, Beginning Balance	417,238	318,729	232,921
Number of share equivalents, Granted	118,859	169,662	119,038
Number of share equivalents, Forfeited share equivalents	(19,736)	(18,975)	(10,949)
Number of share equivalents, Vested share equivalents	(75,331)	(52,178)	(22,281)
Number of share equivalents, Ending Balance	441,030	417,238	318,729
Dividend equivalents, Beginning Balance	22,351	16,035	8,942
Dividend equivalents, Granted	9,566	11,189	9,152
Dividend equivalents, Forfeited share equivalents	(1,754)	(785)	(367)
Dividend equivalents, Vested share equivalents	(7,515)	(4,088)	(1,692)
Dividend equivalents, Ending Balance	22,648	22,351	16,035
Total share equivalents, Beginning Balance	439,589	334,764	241,863
Total share equivalents, Granted	128,425	180,851	128,190
Total share equivalents, Forfeited share equivalents	(21,490)	(19,760)	(11,316)
Total share equivalents, Vested share equivalents	(82,846)	(56,266)	(23,973)
Total share equivalents, Ending Balance	463,678	439,589	334,764
Value of share equivalents, Beginning Balance	$ 27,628,000	$ 16,444,000	$ 11,924,000
Value of share equivalents, Granted	8,328,000	11,366,000	6,297,000
Value of share equivalents, Forfeited share equivalents	1,394,000	1,242,000	556,000
Value of share equivalents, Vested share equivalents	5,512,000	2,922,000	1,180,000
Value of share equivalents, Ending Balance	$ 30,070,000	$ 27,628,000	$ 16,444,000

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Long-Term Debt

12 Months Ended

Dec. 31, 2014

Debt Disclosure [Abstract]

Long-Term Debt

NOTE 16 – LONG-TERM DEBT

Long-term debt at December 31 is summarized as follows:

(Dollars in thousands)
	2014		2013
IBERIABANK:
Federal Home Loan Bank notes, 0.724% to 7.040%	$	210,549	$	92,267
Notes payable - Investment fund contribution, 7 to 40 year term, 0.50% to 5.00% fixed		80,843		76,570
		291,392		168,837
IBERIABANK Corporation (junior subordinated debt):
Statutory Trust I, 3 month LIBOR (1), plus 3.25%		10,310		10,310
Statutory Trust II, 3 month LIBOR (1), plus 3.15%		10,310		10,310
Statutory Trust III, 3 month LIBOR (1), plus 2.00%		10,310		10,310
Statutory Trust IV, 3 month LIBOR (1), plus 1.60%		15,464		15,464
American Horizons Statutory Trust I, 3 month LIBOR (1), plus 3.15%		6,186		6,186
Statutory Trust V, 3 month LIBOR (1), plus 1.435%		10,310		10,310
Statutory Trust VI, 3 month LIBOR (1), plus 2.75%		12,372		12,372
Statutory Trust VII, 3 month LIBOR (1), plus 2.54%		13,403		13,403
Statutory Trust VIII, 3 month LIBOR (1), plus 3.50%		7,217		7,217
OMNI Trust I, 3 month LIBOR (1), plus 3.30%		8,248		8,248
OMNI Trust II, 3 month LIBOR (1), plus 2.79%		7,732		7,732
		111,862		111,862
	$	403,254	$	280,699

⁽¹⁾ The interest rate on the Company’s long-term debt indexed to LIBOR is based on the 3-month LIBOR rate. The 3-month LIBOR rate was 0.26% and 0.25% at December 31, 2014 and 2013, respectively.

Outstanding FHLB advances are amortized over periods ranging from 2 to 20 years, and have a balloon feature at maturity. Advances are collateralized by a blanket pledge of eligible loans, subject to contractual adjustments which reduce the borrowing base, as well as a secondary pledge of FHLB stock and FHLB demand deposits, the amount of which can exceed the amounts borrowed based on contractually required adjustments. Total additional advances available from the FHLB at December 31, 2014 were $2.8 billion under the blanket floating lien and an additional $736.3 million with a pledge of investment securities. The weighted average advance rate was 3.24% and 3.95% at December 31, 2014 and 2013, respectively.

The Company has various funding arrangements with commercial banks providing up to $155.0 million in the form of federal funds and other lines of credit. At December 31, 2014, there were no balances outstanding on these lines and all of the funding was available to the Company.

Junior subordinated debt consists of a total of $111.9 million in Junior Subordinated Deferrable Interest Debentures of the Company issued to statutory trusts that were funded by the issuance of floating rate capital securities of the trusts. Issuances of $10.3 million each were completed in November 2002, June 2003, September 2004, and June 2007 and an issuance of $15.5 million was completed in October 2006. The issue of $6.2 million completed in March 2003 was assumed in the American Horizons acquisition. The Company issued $25.8 million in November 2007 and $7.2 million in March 2008 to provide funding for various business activities, primarily loan growth. Issuances of $8.2 million and $7.7 million were assumed in the OMNI acquisition during 2011.

The terms of the junior subordinated debt are 30 years, and they are callable at par by the Company any time after 5 years. Interest is payable quarterly and may be deferred at any time at the election of the Company for up to 20 consecutive quarterly periods. During a deferral period, the Company is subject to certain restrictions, including being prohibited from declaring and paying dividends to its common shareholders.

As of December 31, 2014, the junior subordinated debt qualifies as Tier 1 capital for regulatory purposes.

Advances and long-term debt at December 31, 2014 have maturities or call dates in future years as follows:

(Dollars in thousands)
2015	$	6,941
2016		41,916
2017		101,321
2018		20,741
2019		8,696
2020 and thereafter		223,639
	$	403,254

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Other Real Estate Owned

12 Months Ended

Dec. 31, 2014

Banking and Thrift [Abstract]

Other Real Estate Owned

NOTE 12 – OTHER REAL ESTATE OWNED

Other real estate owned is included in Other assets on the Company’s consolidated balance sheets. Other real estate owned, segregated into non-covered and covered properties, consists of the following at December 31 for the periods indicated. For further discussion of loss share coverage periods applicable to the covered foreclosed assets, see Note 8 to these consolidated financial statements.

	2014						2013
(Dollars in thousands)	Non-covered		Covered (1)		Total		Non-covered		Covered		Total
Real estate owned acquired by foreclosure	$	18,614	$	22,872	$	41,486	$	28,072	$	60,474	$	88,546
Real estate acquired for development or resale		11,556		—		11,556		9,206		—		9,206
Other foreclosed property		81		824		905		93		1,328		1,421
Total	$	30,251	$	23,696	$	53,947	$	37,371	$	61,802	$	99,173

⁽¹⁾ Included in covered OREO at December 31, 2014 is $9.6 million of assets whose reimbursable loss periods ended as of January 1, 2015.

During the second quarter of 2013, the Company announced plans to close ten branches as part of its business strategy. In addition, during the second quarter of 2014, the Company closed nine branches as part of its acquisition of Teche. The Company notified customers of these branch closings and received the required regulatory approvals to proceed with closure. The Company reviewed the carrying amount of the owned properties and concluded carrying amounts exceeded the fair value of certain branches at that date. Fair value of the branches was based on a third-party broker opinion of value using both a comparable sales and cash flow approach. The Company did not modify the third-party pricing information for unobservable inputs. As a result, the Company recorded impairment losses in other non-interest expense in its consolidated statements of comprehensive income for the years ended December 31, 2014 and 2013. After the impairment losses, the carrying value of the branches was $3.0 million and $5.1 million at December 31, 2014 and 2013, respectively, and is included in OREO (as real estate acquired for development or resale) on the Company’s consolidated balance sheets.

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Loans - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Deferred loan origination fees	$ 20,600,000	$ 18,600,000
Deferred loan expenses	9,400,000	7,600,000
Deposit liabilities reclassified as loans receivable	5,600,000	3,100,000
Loans with carrying value pledged to secure public deposits and other borrowings	3,100,000,000	2,300,000,000
Interest income, nonaccrual loans	1,800,000	2,900,000	3,200,000
Carrying amounts of loans acquired	1,100,000,000
Loans accounted for under ASC Topics 310-10 and 310-20	1,000,000,000
Basis in acquired loans at acquisition	66,675,000
Acquired Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Basis in acquired loans at acquisition	66,700,000
Trust One- Memphis [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired loans	86,500,000
Teche [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired loans	700,500,000
First Private [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired loans	299,300,000
Troubled Debt Restructurings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total TDRs	$ 0	$ 14,600,000

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Loss Sharing Agreements and FDIC Loss Share Receivable

12 Months Ended

Dec. 31, 2014

Text Block [Abstract]

Loss Sharing Agreements and FDIC Loss Share Receivable

NOTE 8 – LOSS SHARING AGREEMENTS AND FDIC LOSS SHARE RECEIVABLE

Loss Sharing Agreements

In 2009, the Company acquired substantially all of the assets and liabilities of CSB, and certain assets and assumed certain deposits and other liabilities of Orion and Century. In 2010, the Company acquired certain assets, deposits, and other liabilities of Sterling. Excluding consumer loans acquired from Sterling, the loans and foreclosed real estate that were acquired in these transactions are covered by loss share agreements between the FDIC and IBERIABANK, which afford IBERIABANK loss protection.

During the reimbursable loss periods, the FDIC will cover 80% of covered loan and foreclosed real estate losses up to certain thresholds for all four acquisitions, and 95% of losses that exceed contractual thresholds for CSB, Orion, and Century. The CSB reimbursable loss period ended as of October 1, 2014 for all covered assets excluding single family residential assets. The CSB reimbursable loss period for single family residential assets will end during the third quarter of 2019. The Century and Orion reimbursable loss periods ended as of January 1, 2015 for all covered assets excluding single family residential assets and will end during the fourth quarter of 2019 for single family residential assets. The Sterling reimbursable loss period ends during the third quarter of 2015 for all covered assets excluding single family residential assets and will end during the third quarter of 2020 for single family residential assets. To the extent that loss share coverage ends prior to triggering events on covered assets that would enable the Company to collect these amounts from the FDIC, future impairments may be required.

In addition, all covered assets, excluding single family residential assets, have a three year recovery period, which begins upon expiration of the reimbursable loss period. During the recovery periods, the Company must reimburse the FDIC for its share of any recovered losses, net of certain expenses, consistent with the covered loss reimbursement rates in effect during the recovery periods.

The Orion, Century, and Sterling loss share agreements include “clawback” provisions. The clawback provisions require the Company to make payments to the FDIC to the extent that specified cumulative loss floors are not met. For each of the three loss share agreements that contain clawback provisions, cumulative losses have exceeded the cumulative loss floors that would trigger a clawback payment. Previously, the sum of the historical and remaining projected losses and recoveries under one agreement was less than the clawback threshold stated in that agreement. The Company had $0.8 million recorded at December 31, 2013, to reserve for the amount of clawback consideration due to the FDIC based on projected net losses. As of December 31, 2014, projected net losses indicate that a clawback payment is no longer probable. Accordingly, the reserve balance was reversed in 2014 through a reduction of expense in the Company’s consolidated statement of comprehensive income for the year ended December 31, 2014. Improvement in the performance of covered assets in excess of current expectations, particularly in regard to improvements in recoveries and/or reduced losses, through expiration of the recovery periods could result in reduced levels of cumulative losses that trigger the clawback provisions within any or all of the applicable loss share agreements.

FDIC loss share receivables

The Company recorded indemnification assets in the form of FDIC loss share receivables as of the acquisition date of each of the four banks covered by loss share agreements. At acquisition, the indemnification assets represented the fair value of the expected cash flows to be received from the FDIC under the loss share agreements. Subsequent to acquisition, the FDIC loss share receivables are updated to reflect changes in actual and expected amounts collectible adjusted for amortization.

The following is a summary of FDIC loss share receivables year-to-date activity:

	December 31
(Dollars in thousands)	2014			2013
Balance at beginning of period	$	162,312		$	423,069
Change due to (reversal of) loan loss provision recorded on FDIC covered loans		(4,260	)		(56,085	)
Amortization		(74,617	)		(97,849	)
Recoveries payable (submission of reimbursable losses) to the FDIC		3,282			(52,586	)
Impairment		(5,121	)		(31,813	)
Changes due to a change in cash flow assumptions on OREO and other changes		(11,969	)		(22,424	)
Balance at end of period	$	69,627		$	162,312

Impairment of FDIC loss share receivables

Based on improving economic trends, their impact on the amount and timing of expected future cash flows, and delays in the foreclosure process, during the loss share receivable collectibility assessment completed for the year ended December 31, 2014, the Company concluded that certain expected losses were probable of not being collected from either the FDIC or the customer because such projected losses were no longer expected to occur or were expected to occur beyond the reimbursable loss periods specified within the loss share agreements. Management deemed an impairment charge necessary for the year ended December 31, 2014 for $5.1 million attributable to losses on OREO transactions that moved beyond the loss share term.

On April 10, 2013, management concluded that an impairment charge of $31.8 million was required and was recognized in the Company’s consolidated financial statements during the three-month period ended March 31, 2013.

FDIC loss share receivables collectability assessment

The Company assesses the FDIC loss share receivables for collectibility on a quarterly basis. Based on the collectability analysis completed for the year ended December 31, 2014, the Company concluded that the $69.6 million FDIC loss share receivable is fully collectible as of December 31, 2014.

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Fair Value Measurements - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total mortgage income (loss) in the consolidated statement of comprehensive income	$ 3,500,000	$ 400,000	$ 0
Available-for-sale Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value assets transferred from Level 1 to Level 2	14,400,000
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of liabilities	$ 0	$ 0	$ 0

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Quarterly Results of Operations and Selected Cash Flow Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Results of Operations

	2014
(Dollars in thousands, except per share data)	Fourth Quarter			Third Quarter			Second Quarter			First Quarter
Total interest income	$	137,276		$	133,793		$	119,514		$	114,232
Total interest expense		12,596			12,042			10,241			9,824
Net interest income		124,680			121,751			109,273			104,408
Provision for loan losses		6,495			5,714			4,748			2,103
Net interest income after provision for loan losses		118,185			116,037			104,525			102,305
Gain on sale of investments, net		164			582			8			19
Other noninterest income		46,908			46,530			43,753			35,662
Noninterest expense		119,382			120,360			127,309			107,428
Income before income taxes		45,875			42,789			20,977			30,558
Income tax expense		9,939			11,897			4,750			8,163
Net income	$	35,936		$	30,892		$	16,227		$	22,395
Preferred stock dividends		—			—			—			—
Income available to common shareholders		35,936			30,892			16,227			22,395
Earnings allocated to unvested restricted stock		(530	)		(465	)		(258	)		(405	)
Earnings available to common shareholders - Diluted	$	35,406		$	30,427		$	15,969		$	21,990
Earnings per share - Basic	$	1.08		$	0.93		$	0.53		$	0.75
Earnings per share - Diluted		1.07			0.92			0.53			0.75
Cash dividends declared per common share		0.34			0.34			0.34			0.34
	2013
	Fourth Quarter			Third Quarter			Second Quarter			First Quarter
Total interest income	$	114,092		$	108,512		$	108,177		$	106,416
Total interest expense		10,654			11,060			11,695			13,545
Net interest income		103,438			97,452			96,482			92,871
(Reversal of) Provision for loan losses		4,700			2,014			1,807			(3,377	)
Net interest income after (reversal of) provision for loan losses		98,738			95,438			94,675			96,248
Gain (loss) on sale of investments, net		19			13			(57	)		2,359
Other noninterest income		38,696			43,250			42,546			42,132
Noninterest expense		102,674			108,152			117,361			144,898
Income (loss) before income taxes		34,779			30,549			19,803			(4,159	)
Income tax expense (benefit)		9,175			7,357			4,213			(4,876	)
Net income	$	25,604		$	23,192		$	15,590		$	717
Preferred stock dividends		—			—			—			—
Income available to common shareholders		25,604			23,192			15,590			717
Earnings allocated to unvested restricted stock		(456	)		(425	)		(293	)		(20	)
Earnings available to common shareholders - Diluted	$	25,148		$	22,767		$	15,297		$	697
Earnings per share - Basic	$	0.86		$	0.78		$	0.53		$	0.02
Earnings per share - Diluted		0.86			0.78			0.53			0.02
Cash dividends declared per common share		0.34			0.34			0.34			0.34

Schedule of Error Corrections and Prior Period Adjustments Effect on Statements of Comprehensive Income

The following table presents the effect this error correction and purchase accounting adjustments had on the reported consolidated statements of comprehensive income for the periods indicated:

			Adjustment
(Dollars in thousand, except per share data)	As Previously Reported		Error Correction			Purchase Accounting			As Adjusted
Three Months Ended June 30, 2014
Net interest income	$	108,979	$	—		$	294		$	109,273
Non-interest income		47,963		(4,189	)		(13	)		43,761
Non-interest expense		127,375		(170	)		104			127,309
Income tax expense		6,271		(1,656	)		135			4,750
Net income		18,548		(2,363	)		42			16,227
Earnings per share - basic		0.60		(0.07	)		—			0.53
Earnings per share - diluted		0.60		(0.07	)		—			0.53
Three Months Ended September 30, 2014
Net interest income	$	121,041	$	—		$	710		$	121,751
Non-interest income		45,663		1,487			(38	)		47,112
Non-interest expense		120,060		170			130			120,360
Income tax expense		11,186		521			190			11,897
Net income		29,744		796			352			30,892
Earnings per share - basic		0.89		0.03			0.01			0.93
Earnings per share - diluted		0.89		0.02			0.01			0.92

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Fair Value of Financial Instruments - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Short-term borrowings maturity period	90 days

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Goodwill and Other Acquired Intangible Assets - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Goodwill And Other Intangibles [Line Items]
Impairment of goodwill	$ 9.7
Other Assets [Member]
Goodwill And Other Intangibles [Line Items]
Title plant assets	$ 6.7	$ 6.7

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Loans

12 Months Ended

Dec. 31, 2014

Receivables [Abstract]

Loans

NOTE 6 – LOANS

Loans consist of the following, segregated into non-covered and covered loans, for the periods indicated:

	December 31, 2014
	Non-covered loans
(Dollars in thousands)	Legacy Loans		Acquired Loans		Covered Loans(1)		Total
Commercial loans:
Real estate	$	3,718,058	$	497,949	$	189,126	$	4,405,133
Business		3,284,140		93,549		31,260		3,408,949
		7,002,198		591,498		220,386		7,814,082
Residential mortgage loans:
Residential 1-4 family		495,638		424,579		128,024		1,048,241
Construction / Owner Occupied		32,056		—		—		32,056
		527,694		424,579		128,024		1,080,297
Consumer and other loans:
Home equity		1,290,976		217,699		92,430		1,601,105
Indirect automobile		396,766		392		—		397,158
Other		451,080		93,618		3,704		548,402
		2,138,822		311,709		96,134		2,546,665
Total	$	9,668,714	$	1,327,786	$	444,544	$	11,441,044
	December 31, 2013
	Non-covered loans
(Dollars in thousands)	Legacy Loans		Acquired Loans		Covered Loans		Total
Commercial loans:
Real estate	$	3,134,904	$	345,069	$	387,332	$	3,867,305
Business		2,906,051		53,037		37,025		2,996,113
		6,040,955		398,106		424,357		6,863,418
Residential mortgage loans:
Residential 1-4 family		404,922		18,135		154,025		577,082
Construction / Owner Occupied		9,450		—		—		9,450
		414,372		18,135		154,025		586,532
Consumer and other loans:
Home equity		1,101,227		53,443		137,122		1,291,792
Indirect automobile		373,383		1,853		—		375,236
Other		358,384		12,368		4,289		375,041
		1,832,994		67,664		141,411		2,042,069
Total	$	8,288,321	$	483,905	$	719,793	$	9,492,019

(1) Included as covered loans at December 31, 2014 is $174.7 million of assets whose reimbursable loss periods ended as of January 1, 2015.

In 2009, the Company acquired substantially all of the assets and liabilities of CapitalSouth Bank (“CSB”), and certain assets, deposits, and other liabilities of Orion Bank (“Orion”) and Century Bank (“Century”). In 2010, the Company acquired certain assets and assumed certain deposits and other liabilities of Sterling Bank (“Sterling”). Substantially all of the loans and foreclosed real estate that were acquired in these transactions are covered by loss sharing agreements between the FDIC and IBERIABANK, which afford IBERIABANK loss protection. Refer to Note 8 for additional information regarding the Company’s loss sharing agreements.

Because of the loss protection provided by the FDIC, the risks associated with CSB, Orion, Century, and Sterling covered loans and foreclosed real estate are significantly different from those assets not covered under the loss share agreements. Accordingly, the Company presents loans currently indemnified as “covered loans” and loans that are not currently indemnified as “non-covered loans.”

Deferred loan origination fees were $20.6 million and $18.6 million and deferred loan expenses were $9.4 million and $7.6 million at December 31, 2014 and 2013, respectively. In addition to loans issued in the normal course of business, the Company considers overdrafts on customer deposit accounts to be loans and reclassifies these overdrafts as loans in its consolidated balance sheets. At December 31, 2014 and 2013, overdrafts of $5.6 million and $3.1 million, respectively, have been reclassified to loans.

Loans with carrying values of $3.1 billion and $2.3 billion were pledged to secure public deposits and other borrowings at December 31, 2014 and 2013, respectively.

Non-covered Loans

The following tables provide an analysis of the aging of non-covered loans as of December 31, 2014 and 2013. Because of the difference in accounting for acquired loans, the tables below further segregate the Company’s non-covered loans between legacy loans and acquired loans. For purposes of the following tables, subprime mortgage loans are defined as the Company’s mortgage loans that have borrower FICO scores that are less than 620 at the time of origination or were purchased outside of a business combination.

	December 31, 2014
	Legacy loans
	Past Due (1)								Current		Total Legacy Loans, Net of Unearned Income		Recorded Investment > 90 days and Accruing
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total
Commercial real estate - Construction	$	507	$	—	$	69	$	576	$	483,663	$	484,239	$	—
Commercial real estate - Other		11,799		148		6,883		18,830		3,214,989		3,233,819		—
Commercial business		1,589		1,860		3,228		6,677		3,277,463		3,284,140		200
Residential mortgage - Prime		1,389		2,616		11,305		15,310		392,900		408,210		538
Residential mortgage - Subprime		—		—		3,595		3,595		115,889		119,484		—
Consumer - Home equity		4,096		595		7,420		12,111		1,278,865		1,290,976		16
Consumer - Indirect automobile		2,447		396		1,419		4,262		392,504		396,766		—
Consumer - Credit card		253		163		1,032		1,448		71,297		72,745		—
Consumer - Other		1,285		424		773		2,482		375,853		378,335		—
Total	$	23,365	$	6,202	$	35,724	$	65,291	$	9,603,423	$	9,668,714	$	754
	December 31, 2013
	Legacy loans
	Past Due (1)								Current		Total Legacy Loans, Net of Unearned Income		Recorded Investment > 90 days and Accruing
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total
Commercial real estate - Construction	$	—	$	—	$	1,803	$	1,803	$	381,292	$	383,095	$	—
Commercial real estate - Other		6,098		5,630		7,650		19,378		2,732,431		2,751,809		2
Commercial business		2,117		423		15,020		17,560		2,888,491		2,906,051		—
Residential mortgage - Prime		1,104		852		9,684		11,640		286,167		297,807		1,073
Residential mortgage - Subprime		—		—		1,626		1,626		114,939		116,565		—
Consumer - Home equity		1,956		569		6,808		9,333		1,091,894		1,101,227		—
Consumer - Indirect automobile		1,427		293		1,275		2,995		370,388		373,383		—
Consumer - Credit card		266		92		411		769		62,873		63,642		—
Consumer - Other		458		106		485		1,049		293,693		294,742		—
Total	$	13,426	$	7,965	$	44,762	$	66,153	$	8,222,168	$	8,288,321	$	1,075

⁽¹⁾  Past due loans greater than 90 days include all loans on nonaccrual status, regardless of past due status, as of the period indicated. Nonaccrual loans are presented separately in the “Nonaccrual Loans” section below.

	December 31, 2014
	Non-covered acquired loans
	Past Due (1)								Current		Discount/ Premium			Total Non-covered Acquired Loans, Net of Unearned Income		Recorded Investment > 90 days and Accruing
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total
Commercial real estate - Construction	$	2,740	$	57	$	1,284	$	4,081	$	26,667	$	(1,170	)	$	29,578	$	1,284
Commercial real estate - Other		4,419		840		26,480		31,739		475,751		(39,119	)		468,371		26,376
Commercial business		2,106		70		1,635		3,811		94,962		(5,224	)		93,549		1,635
Residential mortgage - Prime		152		2,367		9,339		11,858		418,552		(5,831	)		424,579		8,087
Consumer - Home equity		649		385		8,774		9,808		216,310		(8,419	)		217,699		8,383
Consumer - Indirect automobile		13		17		9		39		393		(40	)		392		9
Consumer - Other		1,458		113		1,949		3,520		94,315		(4,217	)		93,618		1,829
Total	$	11,537	$	3,849	$	49,470	$	64,856	$	1,326,950	$	(64,020	)	$	1,327,786	$	47,603
	December 31, 2013
	Non-covered acquired loans
	Past Due (1)								Current		Discount/ Premium			Total Non-covered Acquired Loans, Net of Unearned Income		Recorded Investment > 90 days and Accruing
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total
Commercial real estate - Construction	$	388	$	—	$	2,542	$	2,930	$	19,833	$	(2,532	)	$	20,231	$	2,542
Commercial real estate - Other		1,798		1,963		27,967		31,728		345,286		(52,176	)		324,838		27,967
Commercial business		544		—		1,218		1,762		54,189		(2,914	)		53,037		1,218
Residential mortgage - Prime		—		—		226		226		18,796		(887	)		18,135		226
Consumer - Home equity		313		516		4,242		5,071		53,995		(5,623	)		53,443		4,242
Consumer - Indirect automobile		33		—		95		128		1,725		—			1,853		95
Consumer - Other		175		101		975		1,251		12,598		(1,481	)		12,368		975
Total	$	3,251	$	2,580	$	37,265	$	43,096	$	506,422	$	(65,613	)	$	483,905	$	37,265

⁽¹⁾  Past due information presents acquired loans at the gross loan balance, prior to application of discounts.

Non-accrual Loans

The following table provides the recorded investment of legacy loans on non-accrual status at December 31:

(Dollars in thousands)	2014		2013
Commercial real estate - Construction	$	69	$	1,803
Commercial real estate - Other		6,883		7,648
Commercial business		3,028		15,020
Residential mortgage - Prime		10,767		8,611
Residential mortgage - Subprime		3,595		1,626
Consumer - Home equity		7,404		6,808
Consumer - Indirect automobile		1,419		1,275
Consumer - Credit card		1,032		411
Consumer - Other		773		485
Total	$	34,970	$	43,687

The amount of interest income that would have been recorded in 2014, 2013 and 2012 if total nonaccrual loans had been current in accordance with their contractual terms was approximately $1.8 million, $2.9 million and $3.2 million respectively.

Covered Loans

The carrying amount of the acquired covered loans at December 31, 2014 and 2013 consisted of loans determined to be impaired at the acquisition date, which are accounted for in accordance with ASC Topic 310-30, and loans that were considered to be performing at the acquisition date, accounted for by analogy to ASC Topic 310-30, as detailed in the following tables.

	December 31, 2014
(Dollars in thousands)	Acquired Impaired Loans		Acquired Performing Loans		Total Covered Loans
Commercial loans:
Real estate	$	1,253	$	187,873	$	189,126
Business		—		31,260		31,260
		1,253		219,133		220,386
Residential mortgage loans:
Residential 1-4 family		22,918		105,106		128,024
Construction / Owner Occupied		—		—		—
		22,918		105,106		128,024
Consumer and other loans:
Home equity		12,872		79,558		92,430
Indirect automobile		—		—		—
Other		489		3,215		3,704
		13,361		82,773		96,134
Total	$	37,532	$	407,012	$	444,544
	December 31, 2013
(Dollars in thousands)	Acquired Impaired Loans		Acquired Performing Loans		Total Covered Loans
Commercial loans:
Real estate	$	14,904	$	372,428	$	387,332
Business		—		37,025		37,025
		14,904		409,453		424,357
Residential mortgage loans:
Residential 1-4 family		28,223		125,802		154,025
Construction / Owner Occupied		—		—		—
		28,223		125,802		154,025
Consumer and other loans:
Home equity		21,768		115,354		137,122
Indirect automobile		—		—		—
Other		1,182		3,107		4,289
		22,950		118,461		141,411
Total	$	66,077	$	653,716	$	719,793

Loans Acquired

As discussed in Note 4, during 2014, the Company acquired loans of $86.5 million from Trust One-Memphis, $700.5 million from Teche, and $299.3 million from First Private. Of the total $1.1 billion of loans acquired in 2014, $1.0 billion were determined to have no evidence of deteriorated credit quality and are accounted for under ASC Topics 310-10 and 310-20. The remaining $66.7 million were determined to have deteriorated credit quality under ASC Topic 310-30. The tables below show the balances acquired during 2014 for these two subsections of the portfolio as of the acquisition date.

(Dollars in thousands)
Contractually required principal and interest at acquisition	$	1,224,635
Expected losses and foregone interest		(20,790	)
Cash flows expected to be collected at acquisition		1,203,845
Fair value of acquired loans at acquisition	$	1,014,903

(Dollars in thousands)	Acquired Impaired Loans			Acquired Performing Impaired Loans			Total Acquired Loans
Contractually required principal and interest at acquisition	$	71,871		$	15,130		$	87,001
Nonaccretable difference (expected losses and foregone interest)		(6,117	)		(361	)		(6,478	)
Cash flows expected to be collected at acquisition		65,754			14,769			80,523
Accretable yield		(12,312	)		(1,536	)		(13,848	)
Basis in acquired loans at acquisition	$	53,442		$	13,233		$	66,675

The following is a summary of changes in the accretable difference for loans accounted for under ASC 310-30 of acquired impaired loans during the years ended December 31:

	2014
(Dollars in thousands)	Acquired Impaired Loans			Acquired Performing Impaired Loans			Total Acquired Loans
Balance at beginning of period	$	78,349		$	276,543		$	354,892
Acquisition		12,312			1,536			13,848
Transfers from nonaccretable difference to accretable yield		4,405			21,439			25,844
Accretion		(15,095	)		(88,138	)		(103,233	)
Changes in expected cash flows not affecting nonaccretable differences (1)		(5,722	)		2,022			(3,700	)
Balance at end of period	$	74,249		$	213,402		$	287,651
	2013
	Acquired Impaired Loans			Acquired Performing Impaired Loans			Total Acquired Loans
Balance at beginning of period	$	76,623		$	279,770		$	356,393
Transfers from nonaccretable difference to accretable yield		7,849			42,894			50,743
Accretion		(16,273	)		(163,183	)		(179,456	)
Changes in expected cash flows not affecting nonaccretable differences (1)		10,150			117,062			127,212
Balance at end of period	$	78,349		$	276,543		$	354,892
	2012
	Acquired Impaired Loans			Acquired Performing Impaired Loans			Total Acquired Loans
Balance at beginning of period	$	83,834		$	386,977		$	470,811
Acquisition		1,190			22,899			24,089
Transfers from nonaccretable difference to accretable yield		(11,816	)		(47,842	)		(59,658	)
Accretion		(30,417	)		(218,892	)		(249,309	)
Changes in expected cash flows not affecting nonaccretable differences (1)		33,832			136,628			170,460
Balance at end of period	$	76,623		$	279,770		$	356,393

⁽¹⁾ Includes changes in cash flows expected to be collected due to the impact of changes in actual or expected timing of liquidation events, modifications, changes in interest rates and changes in prepayment assumptions.

Troubled Debt Restructurings

Information about the Company’s TDRs at December 31, 2014 and 2013 is presented in the following tables. The Company excludes as TDRs modifications of loans that are accounted for within a pool under ASC Topic 310-30, which include the covered loans above, as well as certain acquired loans. Accordingly, such modifications do not result in the removal of those loans from the pool, even if the modification of those loans would otherwise be considered a TDR. As a result, all covered and certain acquired loans that would otherwise meet the criteria for classification as a TDR are excluded from the tables below.

	December 31, 2014								December 31, 2013
	Accruing Loans								Accruing Loans
(Dollars in thousands)	Current		Past Due > 30 days		Nonaccrual TDRs		Total TDRs		Current		Past Due > 30 days		Nonaccrual TDRs		Total TDRs
Commercial real estate - Construction	$	—	$	—	$	—	$	—	$	—		—		—		—
Commercial real estate - Other		355		—		—		355		400		—		4,452		4,852
Commercial business		1,075		—		1,971		3,046		976		—		13,791		14,767
Residential mortgage - Prime		—		—		—		—		—		—		—		—
Residential mortgage - Subprime		—		—		—		—		—		—		—		—
Consumer - Home equity		—		—		238		238		—		—		258		258
Consumer - Indirect automobile		—		—		—		—		—		—		—		—
Consumer - Credit card		—		—		—		—		—		—		—		—
Consumer - Other		—		—		—		—		—		—		—		—
Total	$	1,430	$	—	$	2,209	$	3,639	$	1,376	$	—	$	18,501	$	19,877

At December 31, 2014, there were no TDRs that occurred during the current year through modification of the original loan terms. TDRs totaling $14.6 million occurred during the year ending December 31, 2013. The following table provides information on how the TDRs were modified during years ended December 31:

(Dollars in thousands)	2014		2013
Extended maturities	$	—	$	—
Interest rate adjustment		—		—
Maturity and interest rate adjustment		—		—
Movement to or extension of interest-rate only payments		—		—
Forbearance		—		12,975
Other concession(s) (1)		—		1,587
Total	$	—	$	14,562

⁽¹⁾ Other concessions include concessions or a combination of concessions that do not consist of maturity extensions, interest rate adjustments, forbearance or covenant modifications.

The Company had no commercial real estate, residential mortgage or consumer TDRs that were added during the years ended December 31, 2014 and 2013. Information about the Company’s TDRs occurring in these periods is presented in the following table.

	December 31, 2014						December 31, 2013
(In thousands, except number of loans)	Number of Loans		Pre-modification Outstanding Recorded Investment		Post-modification Outstanding Recorded Investment (1)		Number of Loans		Pre-modification Outstanding Recorded Investment		Post-modification Outstanding Recorded Investment (1)
Commercial business		—		—		—		9		14,835		12,429
Total		—	$	—	$	—		9	$	14,835	$	12,429

⁽¹⁾ Recorded investment includes any allowance for credit losses recorded on the TDRs at the dates indicated.

Information detailing non-covered TDRs that subsequently defaulted during the previous twelve months is presented in the following table. The Company has defined a default as any loan with a loan payment that is currently past due greater than 30 days, or was past due greater than 30 days at any point during the previous twelve months, or since the date of modification, whichever is shorter.

	December 31, 2014				December 31, 2013
(In thousands, except number of loans)	Number of Loans		Recorded Investment		Number of Loans		Recorded Investment
Commercial real estate		30	$	—		35	$	4,452
Commercial business		9		1,600		17		12,808
Residential mortgage - Prime		—		—		—		—
Consumer - Home Equity		—		—		1		45
Consumer - Indirect automobile		—		—		—		—
Consumer - Credit card		—		—		—		—
Consumer - Other		1		—		1		—
Total		40	$	1,600		54	$	17,305

XML

Allowance for Credit Losses and Credit Quality

12 Months Ended

Dec. 31, 2014

Receivables [Abstract]

Allowance for Credit Losses and Credit Quality

NOTE 7 – ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY

Allowance for Credit Losses Activity

A summary of changes in the allowance for credit losses for the covered loan and non-covered loan portfolios for the years ended December 31 is as follows:

	2014
	Non-covered loans
(Dollars in thousands)	Legacy Loans			Acquired Loans			Covered Loans			Total
Allowance for credit losses
Balance at beginning of period	$	67,342		$	4,557		$	71,175		$	143,074
(Reversal of) Provision for loan losses before benefit attributable to FDIC loss share agreements		14,274			(1,546	)		2,072			14,800
Adjustment attributable to FDIC loss share arrangements		—			—			4,260			4,260
Net (reversal of) provision for loan losses		14,274			(1,546	)		6,332			19,060
Adjustment attributable to FDIC loss share arrangements		—			—			(4,260	)		(4,260	)
Transfer of balance to OREO		—			(933	)		(6,390	)		(7,323	)
Transfer of balance to non-covered		—			8,661			(8,661	)		—
Loans charged-off		(11,312	)		(2,073	)		(13,470	)		(26,855	)
Recoveries		5,870			527			38			6,435
Balance at end of period	$	76,174		$	9,193		$	44,764		$	130,131
Reserve for unfunded lending commitments
Balance, beginning of period	$	11,147		$	—		$	—		$	11,147
Provision for unfunded lending commitments		654			—			—			654
Balance at end of period	$	11,801		$	—		$	—		$	11,801
	2013
	Non-covered loans
	Legacy Loans			Acquired Loans			Covered Loans			Total
Allowance for loan losses
Balance at beginning of period	$	74,211		$	8,816		$	168,576		$	251,603
(Reversal of) Provision for loan losses before adjustment attributable to FDIC loss share agreements		6,828			(3,158	)		(54,610	)		(50,940	)
Adjustment attributable to FDIC loss share arrangements		—			—			56,085			56,085
Net (reversal of) provision for loan losses		6,828			(3,158	)		1,475			5,145
Adjustment attributable to FDIC loss share arrangements		—			—			(56,085	)		(56,085	)
Transfer of balance to OREO		—			(1,085	)		(27,041	)		(28,126	)
Transfer of balance to the RULC		(9,828	)		—			—			(9,828	)
Loans charged-off		(10,686	)		(31	)		(15,764	)		(26,481	)
Recoveries		6,817			15			14			6,846
Balance at end of period		67,342			4,557		$	71,175		$	143,074
Reserve for unfunded lending commitments
Balance, beginning of period		—			—			—			—
Transfer of balance from the allowance for loan losses		9,828			—			—			9,828
Provision for unfunded lending commitments		1,319			—			—			1,319
Balance at end of period	$	11,147		$	—		$	—		$	11,147

	2012
	Non-covered loans
	Legacy Loans			Acquired Loans			Covered Loans			Total
Allowance for loan losses
Balance at beginning of period	$	74,861		$	—		$	118,900		$	193,761
Provision for loan losses before adjustment attributable to FDIC loss share agreements		3,804			9,799			91,153			104,756
Adjustment attributable to FDIC loss share arrangements		—			—			(84,085	)		(84,085	)
Net provision for loan losses		3,804			9,799			7,068			20,671
Adjustment attributable to FDIC loss share arrangements		—			—			84,085			84,085
Transfer of balance to OREO		—			(826	)		(26,343	)		(27,169	)
Loans charged-off		(9,728	)		(179	)		(15,153	)		(25,060	)
Recoveries		5,274			22			19			5,315
Balance at end of period	$	74,211		$	8,816		$	168,576		$	251,603

A summary of changes in the allowance for credit losses for non-covered loans, by loan portfolio type, for the years ended December 31 is as follows:

	2014
(Dollars in thousands)	Commercial Real Estate			Commercial Business			Residential Mortgage			Consumer			Total
Allowance for loan losses
Balance at beginning of period	$	26,590		$	28,515		$	2,546		$	14,248		$	71,899
(Reversal of) Provision for loan losses		(295	)		4,302			694			8,027			12,728
Transfer of balance to OREO		—			(868	)		—			(65	)		(933	)
Transfer of balance to non-covered		6,009			1,699			—			953			8,661
Loans charged off		(2,247	)		(1,659	)		(613	)		(8,866	)		(13,385	)
Recoveries		2,964			105			248			3,080			6,397
Balance at end of period	$	33,021		$	32,094		$	2,875		$	17,377		$	85,367
Reserve for unfunded commitments
Balance at beginning of period	$	3,089		$	4,839		$	72		$	3,147		$	11,147
(Reversal of) Provision for unfunded commitments		350			421			96			(213	)		654
Balance at end of period	$	3,439		$	5,260		$	168		$	2,934		$	11,801
Allowance on loans individually evaluated for impairment	$	20		$	407		$	—		$	3		$	430
Allowance on loans collectively evaluated for impairment		33,001			31,687			2,875			17,374			84,939
Loans, net of unearned income:
Balance at end of period	$	4,216,007		$	3,377,689		$	952,273		$	2,450,531		$	10,996,500
Balance at end of period individually evaluated for impairment		7,013			3,988			—			699			11,700
Balance at end of period collectively evaluated for impairment		4,186,968			3,369,982			936,604			2,438,569			10,932,123
Balance at end of period acquired with deteriorated credit quality		22,026			3,719			15,669			11,263			52,677

	2013
	Commercial			Commercial			Residential
(Dollars in thousands)	Real Estate			Business			Mortgage			Consumer			Total
Allowance for credit losses
Balance at beginning of period	$	38,264		$	28,721		$	2,125		$	13,917		$	83,027
(Reversal of) Provision for loan losses		(8,830	)		3,543			860			8,097			3,670
Transfer of balance to OREO		(319	)		(113	)		(646	)		(7	)		(1,085	)
Transfer of balance to the RULC		(2,939	)		(3,497	)		(40	)		(3,352	)		(9,828	)
Loans charged off		(2,940	)		(516	)		(518	)		(6,743	)		(10,717	)
Recoveries		3,354			377			765			2,336			6,832
Balance at end of period	$	26,590		$	28,515		$	2,546		$	14,248		$	71,899
Reserve for unfunded commitments
Balance at beginning of period	$	—		$	—		$	—		$	—		$	—
Transfer of balance from the allowance for loan losses		2,939			3,497			40			3,352			9,828
Provision for unfunded commitments		150			1,342			32			(205	)		1,319
Balance at end of period	$	3,089		$	4,839		$	72		$	3,147		$	11,147
Allowance on loans individually evaluated for impairment	$	8		$	841		$	180		$	—		$	1,029
Allowance on loans collectively evaluated for impairment		26,582			27,674			2,366			14,248			70,870
Loans, net of unearned income:
Balance at end of period	$	3,479,973		$	2,959,088		$	432,507		$	1,900,658		$	8,772,226
Balance at end of period individually evaluated for impairment		8,705			15,812			1,407			258			26,182
Balance at end of period collectively evaluated for impairment		3,459,028			2,943,246			430,974			1,899,013			8,732,261
Balance at end of period acquired with deteriorated credit quality		12,240			30			126			1,387			13,783
	2012
	Commercial			Commercial			Residential
(Dollars in thousands)	Real estate			Business			Mortgage			Consumer			Total
Allowance for credit losses
Balance at beginning of period	$	35,604		$	25,705		$	897		$	12,655		$	74,861
(Reversal of) Provision for loan losses		1,786			4,021			2,578			5,218			13,603
Transfer of balance to OREO		(292	)		—			(525	)		(9	)		(826	)
Loans charged off		(2,000	)		(1,116	)		(863	)		(5,928	)		(9,907	)
Recoveries		3,166			111			38			1,981			5,296
Balance at end of period	$	38,264		$	28,721		$	2,125		$	13,917		$	83,027
Allowance on loans individually evaluated for impairment	$	226		$	449		$	163		$	42		$	880
Allowance on loans collectively evaluated for impairment		38,038			28,272			1,962			13,875			82,147
Loans, net of unearned income:
Balance at end of period	$	2,990,700		$	2,450,667		$	290,040		$	1,674,417		$	7,405,824
Balance at end of period individually evaluated for impairment		28,052			4,401			1,703			315			34,471
Balance at end of period collectively evaluated for impairment		2,906,792			2,442,796			288,007			1,669,067			7,306,662
Balance at end of period acquired with deteriorated credit quality		55,856			3,470			330			5,035			64,691

A summary of changes in the allowance for credit losses for covered loans, by loan portfolio type, for the years ended December 31 is as follows:

	2014
(Dollars in thousands)	Commercial Real Estate			Commercial Business			Residential Mortgage			Consumer			Total
Allowance for loan losses
Balance at beginning of period	$	38,772		$	5,380		$	10,889		$	16,134		$	71,175
(Reversal of) Provision for loan losses		3,058			399			1,168			1,707			6,332
(Decrease) Increase in FDIC loss share receivable		227			509			(3,854	)		(1,142	)		(4,260	)
Transfer of balance to OREO		(1,897	)		(1,162	)		(1,719	)		(1,612	)		(6,390	)
Transfer of balance to non-covered		(6,009	)		(1,699	)		—			(953	)		(8,661	)
Loans charged off		(10,117	)		(2,192	)		(198	)		(963	)		(13,470	)
Recoveries		38			—			—			—			38
Balance at end of period	$	24,072		$	1,235		$	6,286		$	13,171		$	44,764
Allowance on loans individually evaluated for impairment	$	—		$	—		$	—		$	—		$	—
Allowance on loans collectively evaluated for impairment		24,072			1,235			6,286			13,171			44,764
Loans, net of unearned income:
Balance at end of period	$	189,126		$	31,260		$	128,024		$	96,134		$	444,544
Balance at end of period individually evaluated for impairment		—			—			—			—			—
Balance at end of period collectively evaluated for impairment		187,873			31,260			105,106			82,773			407,012
Balance at end of period acquired with deteriorated credit quality		1,253			—			22,918			13,361			37,532
	2013
(Dollars in thousands)	Commercial Real Estate			Commercial Business			Residential Mortgage			Consumer			Total
Allowance for credit losses
Balance at beginning of period	$	100,871		$	11,375		$	22,566		$	33,764		$	168,576
(Reversal of) Provision for loan losses		1,523			(649	)		286			315			1,475
(Decrease) Increase in FDIC loss share receivable		(28,238	)		(5,032	)		(4,896	)		(17,919	)		(56,085	)
Transfer of balance to OREO		(19,634	)		(314	)		(7,067	)		(26	)		(27,041	)
Loans charged off		(15,764	)		—			—			—			(15,764	)
Recoveries		14			—			—			—			14
Balance at end of period	$	38,772		$	5,380		$	10,889		$	16,134		$	71,175
Allowance on loans individually evaluated for impairment	$	—		$	—		$	—		$	—		$	—
Allowance on loans collectively evaluated for impairment		38,772			5,380			10,889			16,134			71,175
Loans, net of unearned income:
Balance at end of period	$	387,332		$	37,025		$	154,025		$	141,411		$	719,793
Balance at end of period individually evaluated for impairment		—			—			—			—			—
Balance at end of period collectively evaluated for impairment		372,428			37,025			125,802			118,461			653,716
Balance at end of period acquired with deteriorated credit quality		14,904			—			28,223			22,950			66,077

	2012
(Dollars in thousands)	Commercial Real estate			Commercial business			Residential Mortgage			Consumer			Total
Allowance for credit losses
Balance at beginning of period	$	69,175		$	9,788		$	21,184		$	18,753		$	118,900
(Reversal of) Provision for loan losses		4,970			964			323			811			7,068
(Decrease) Increase in FDIC loss share receivable		51,543			3,616			13,895			15,031			84,085
Transfer of balance to OREO		(11,202	)		(2,993	)		(11,323	)		(825	)		(26,343	)
Loans charged off		(13,631	)		—			(1,513	)		(9	)		(15,153	)
Recoveries		16			—			—			3			19
Balance at end of period	$	100,871		$	11,375		$	22,566		$	33,764		$	168,576
Allowance on loans individually evaluated for impairment	$	—		$	—		$	—		$	—		$	—
Allowance on loans collectively evaluated for impairment		100,871			11,375			22,566			33,764			168,576
Loans, net of unearned income:
Balance at end of period	$	640,843		$	87,051		$	187,164		$	177,698		$	1,092,756
Balance at end of period individually evaluated for impairment		—			—			—			—			—
Balance at end of period collectively evaluated for impairment		473,101			84,294			166,932			154,784			879,111
Balance at end of period acquired with deteriorated credit quality		167,742			2,757			20,232			22,914			213,645

Credit Quality

The Company’s investment in non-covered loans by credit quality indicator is presented in the following tables. Because of the difference in accounting for acquired loans, the tables below further segregate the Company’s non-covered loans between legacy loans and acquired loans. Loan premiums/discounts in the tables below represent the adjustment of non-covered acquired loans to fair value at the acquisition date, as adjusted for income accretion and changes in cash flow estimates in subsequent periods. Asset risk classifications for commercial loans reflect the classification as of December 31, 2014 and 2013, respectively. Credit quality information in the tables below includes loans acquired at the gross loan balance, prior to the application of premiums/discounts, at December 31, 2014 and 2013.

	Legacy loans
	December 31, 2014										December 31, 2013
(Dollars in thousands)	Pass		Special Mention		Sub- standard		Doubtful		Total		Pass		Special Mention		Sub- standard		Doubtful		Total
Commercial real estate - Construction	$	483,930	$	240	$	69	$	—	$	484,239	$	370,824	$	9,309	$	2,962	$	—	$	383,095
Commercial real estate - Other		3,161,593		49,847		22,217		162		3,233,819		2,694,161		27,227		30,308		113		2,751,809
Commercial business		3,245,912		7,330		28,965		1,933		3,284,140		2,866,794		6,164		32,167		926		2,906,051
Total	$	6,891,435	$	57,417	$	51,251	$	2,095	$	7,002,198	$	5,931,779	$	42,700	$	65,437	$	1,039	$	6,040,955

	Legacy loans
	December 31, 2014						December 31, 2013
(Dollars in thousands)	Current		30+ Days Past Due		Total		Current		30+ Days Past Due		Total
Residential mortgage - Prime	$	392,900	$	15,310	$	408,210	$	286,167	$	11,640	$	297,807
Residential mortgage - Subprime		115,889		3,595		119,484		114,939		1,626		116,565
Consumer - Home equity		1,278,865		12,111		1,290,976		1,091,894		9,333		1,101,227
Consumer - Indirect automobile		392,504		4,262		396,766		370,388		2,995		373,383
Consumer - Credit card		71,297		1,448		72,745		62,873		769		63,642
Consumer - Other		375,853		2,482		378,335		293,693		1,049		294,742
Total	$	2,627,308	$	39,208	$	2,666,516	$	2,219,954	$	27,412	$	2,247,366

	Non-covered acquired loans
	December 31, 2014													December 31, 2013
(Dollars in thousands)	Pass		Special Mention		Substandard		Doubtful		Discount			Total		Pass		Special Mention		Substandard		Doubtful		Discount			Total
Commercial real estate - Construction	$	24,118	$	2,006	$	4,624	$	—	$	(1,170	)	$	29,578	$	21,244	$	—	$	1,519	$	—	$	(2,532	)	$	20,231
Commercial real estate - Other		445,557		12,794		49,139		—		(39,119	)		468,371		350,412		5,096		21,413		93		(52,176	)		324,838
Commercial business		91,837		1,861		4,818		257		(5,224	)		93,549		53,533		517		1,901		—		(2,914	)		53,037
Total	$	561,512	$	16,661	$	58,581	$	257	$	(45,513	)	$	591,498	$	425,189	$	5,613	$	24,833	$	93	$	(57,622	)	$	398,106

	Non-covered acquired loans
	December 31, 2014									December 31, 2013
(Dollars in thousands)	Current		30+ Days Past Due		Premium (discount)			Total		Current		30+ Days Past Due		Premium (discount)			Total
Residential mortgage - Prime	$	418,552	$	11,858	$	(5,831	)	$	424,579	$	18,796	$	226	$	(887	)	$	18,135
Consumer - Home equity		216,310		9,808		(8,419	)		217,699		53,995		5,071		(5,623	)		53,443
Consumer - Indirect automobile		393		39		(40	)		392		1,725		128		—			1,853
Consumer - Other		94,315		3,520		(4,217	)		93,618		12,598		1,251		(1,481	)		12,368
Total	$	729,570	$	25,225	$	(18,507	)	$	736,288	$	87,114	$	6,676	$	(7,991	)	$	85,799

The Company’s investment in covered loans by credit quality indicator is presented in the following table. Loan premiums/discounts in the tables below represent the adjustment of covered loans to net book value before allowance at the reporting date.

	Covered loans
	December 31, 2014											December 31, 2013
(Dollars in thousands)	Pass		Special Mention		Substandard		Doubtful		Total			Pass		Special Mention		Substandard		Doubtful		Total
Commercial real estate - Construction	$	34,731	$	1,928	$	8,008	$	—	$	44,667		$	42,886	$	7,401	$	23,891	$	497	$	74,675
Commercial real estate - Other		87,509		20,422		51,252		—		159,183			148,579		49,699		144,680		3,267		346,225
Commercial business		23,380		395		9,275		—		33,050			30,710		780		14,556		984		47,030
	$	145,620	$	22,745	$	68,535	$	—	$	236,900		$	222,175	$	57,880	$	183,127	$	4,748	$	467,930
Discount										(16,514	)										(43,573	)
Total									$	220,386										$	424,357

	Covered loans
	December 31, 2014									December 31, 2013
(Dollars in thousands)	Current		30+ Days Past Due		Premium (discount)			Total		Current		30+ Days Past Due		Premium (discount)			Total
Residential prime	$	140,628	$	22,058	$	(34,662	)	$	128,024	$	158,710	$	30,814	$	(35,499	)	$	154,025
Consumer - Home equity		99,478		16,542		(23,590	)		92,430		143,236		35,811		(41,925	)		137,122
Consumer - Credit card		614		34		—			648		648		31		—			679
Consumer - Other		337		18		2,701			3,056		591		144		2,875			3,610
Total	$	241,057	$	38,652	$	(55,551	)	$	224,158	$	303,185	$	66,800	$	(74,549	)	$	295,436

Legacy Impaired Loans

Information on the Company’s investment in legacy impaired loans is presented in the following tables as of and for the periods indicated.

	December 31, 2014
(Dollars in thousands)	Recorded Investment		Unpaid Principal Balance		Related Allowance			Average Recorded Investment		Interest Income Recognized
With no related allowance recorded:
Commercial real estate	$	6,680	$	6,680	$	—		$	6,703	$	132
Commercial business		2,483		2,483		—			2,873		57
Consumer - Home equity		682		682		—			696		19
With an allowance recorded:
Commercial real estate		1,068		1,093		(25	)		1,158		39
Commercial business		1,212		1,620		(408	)		2,117		23
Residential mortgage - Prime		10,532		10,768		(236	)		10,577		11
Residential mortgage - Subprime		3,579		3,595		(16	)		3,686		99
Consumer - Home equity		7,121		7,165		(44	)		7,544		43
Consumer - Indirect automobile		1,410		1,419		(9	)		2,016		51
Consumer - Credit card		1,012		1,032		(20	)		797		—
Consumer - Other		781		790		(9	)		1,009		39
Total	$	36,560	$	37,327	$	(767	)	$	39,176	$	513
Total commercial loans	$	11,443	$	11,876	$	(433	)	$	12,851	$	251
Total mortgage loans		14,111		14,363		(252	)		14,263		110
Total consumer loans		11,006		11,088		(82	)		12,062		152

	December 31, 2013
(Dollars in thousands)	Recorded Investment		Unpaid Principal Balance		Related Allowance			Average Recorded Investment		Interest Income Recognized
With no related allowance recorded:
Commercial real estate	$	8,567	$	8,567	$	—		$	10,443	$	43
Commercial business		13,256		13,256		—			11,074		170
Consumer - Home equity		258		258		—			281		1
With an allowance recorded:
Commercial real estate		1,268		1,284		(16	)		4,414		8
Commercial business		1,927		2,770		(843	)		2,892		100
Residential mortgage - Prime		9,791		10,019		(228	)		8,096		98
Residential mortgage - Subprime		1,617		1,626		(9	)		1,579		—
Consumer - Home equity		6,506		6,550		(44	)		7,593		93
Consumer - Indirect automobile		1,267		1,275		(8	)		2,090		55
Consumer - Credit card		404		411		(7	)		418		—
Consumer - Other		481		485		(4	)		765		19
Total	$	45,342	$	46,501	$	(1,159	)	$	49,645	$	587
Total commercial loans	$	25,018	$	25,877	$	(859	)	$	28,823	$	321
Total mortgage loans		11,408		11,645		(237	)		9,675		98
Total consumer loans		8,916		8,979		(63	)		11,147		168

As of December 31, 2014 and 2013, the Company was not committed to lend additional funds to any customer whose loan was classified as impaired or as a troubled debt restructuring.

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Share-Based Compensation - Compensation Expense Included in Non-Interest Expense and Related Income Tax Benefits (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Compensation expense related to stock options	$ 2,053	$ 2,110	$ 1,873
Income tax benefit related to stock options	719	739	656
Impact on basic earnings per share	$ 0.04	$ 0.05	$ 0.04
Impact on diluted earnings per share	$ 0.04	$ 0.05	$ 0.04
Proceeds from the exercise of stock options	11,693	8,101	2,813
Excess tax benefits related to the exercise of stock options	$ 2,105	$ 886	$ 1,221

XML

Transfers and Servicing of Financial Assets (Including Mortgage Banking Activity)

12 Months Ended

Dec. 31, 2014

Transfers and Servicing [Abstract]

Transfers and Servicing of Financial Assets (Including Mortgage Banking Activity)

NOTE 9 –TRANSFERS AND SERVICING OF FINANCIAL ASSETS (INCLUDING MORTGAGE BANKING ACTIVITY)

Commercial Banking Activity

The unpaid principal balances of loans serviced for others were $533.8 million and $345.0 million at December 31, 2014 and 2013, respectively. Custodial escrow balances maintained in connection with the foregoing portfolio of loans serviced for others, and included in demand deposits, were immaterial at December 31, 2014 and 2013.

Mortgage Banking Activity

IBERIABANK through its subsidiary, IMC, originates mortgage loans for sale into the secondary market. The loans originated primarily consist of residential first mortgages that conform to standards established by the GSEs, but can also consist of junior lien loans secured by residential property. These sales are primarily to private companies that are unaffiliated with the GSEs on a servicing released basis. Changes to the carrying amount of mortgage loans held for sale at December 31 are presented in the following table.

(Dollars in thousands)	2014			2013			2012
Balance at beginning of period	$	128,442		$	267,475		$	153,013
Originations and Purchases		1,675,538			2,116,460			2,432,367
Sales, net of gains		(1,657,409	)		(2,255,493	)		(2,317,905	)
Other		(6,499	)		—			—
Balance at end of period	$	140,072		$	128,442		$	267,475

The following table details the components of mortgage income for the years ended December 31:

(Dollars in thousands)	2014			2013			2012
Fair value changes of derivatives and mortgage loans held for sale:
Mortgage loans held for sale and derivatives	$	631		$	(4,822	)	$	6,772
Derivative settlements		(8,743	)		3,100			—
Gains on sales		59,156			65,393			70,811
Servicing and other income, net		753			526			470
	$	51,797		$	64,197		$	78,053

Mortgage Servicing Rights

Mortgage servicing rights are recorded at the lower of cost or market in “Other assets” on the consolidated balance sheets and are amortized over the remaining servicing life of the loans, with consideration given to prepayment assumptions. Mortgage servicing rights had the following carrying values as of December 31:

	2014							2013
	Gross		Accumulated			Net		Gross		Accumulated			Net
(Dollars in thousands)	Carrying Amount		Amortization			Carrying Amount		Carrying Amount		Amortization			Carrying Amount
Mortgage servicing rights	$	4,751	$	(1,253	)	$	3,498	$	2,146	$	(638	)	$	1,508

The related amortization expense of mortgage servicing rights is as follows:

(Dollars in thousands)	Amount
Aggregate amortization expense for the years ended December 31:
2012	$	225
2013		480
2014		759
Estimated amortization expense for the years ended December 31:
2015	$	1,550
2016		697
2017		531
2018		371
2019		230
2020 and thereafter		119

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Earnings Per Share - Schedule of Basic Earnings Per Common Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Distributed earnings to common shareholders									$ 43,623	$ 39,685	$ 39,349
Undistributed earnings to common shareholders									60,175	24,212	35,603
Total earnings to common shareholders									103,798	63,897	74,952
Distributed earnings per common share									$ 1.40	$ 1.37	$ 1.36
Undistributed earnings per common share									$ 1.92	$ 0.83	$ 1.23
Total earnings per common share	$ 1.08	$ 0.93	$ 0.53	$ 0.75	$ 0.86	$ 0.78	$ 0.53	$ 0.02	$ 3.32	$ 2.20	$ 2.59
Unvested Restricted Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Distributed earnings to common shareholders									694	749	758
Undistributed earnings to common shareholders									958	457	685
Total earnings allocated to unvested restricted stock									$ 1,652	$ 1,206	$ 1,443
Distributed earnings per common share									$ 1.34	$ 1.35	$ 1.37
Undistributed earnings per common share									$ 1.85	$ 0.83	$ 1.24
Total earnings per common share									$ 3.19	$ 2.18	$ 2.61

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Derivative Instruments and Hedging Activities - Outstanding Interest Rate Swap Agreements Not Designated as Hedging Instruments (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Offsetting [Abstract]
Weighted average pay rate	2.90%	3.00%
Weighted average receive rate	0.40%	0.20%
Weighted average maturity in years	7 years 8 months 12 days	7 years 7 months 6 days
Unrealized gain (loss) relating to interest rate swaps	$ 0	$ 0

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Loans - Schedule of Aging of Non-Covered Loans (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Non-Covered Legacy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	$ 23,365	$ 13,426
Past Due, 60-89 days	6,202	7,965
Past Due, Greater than 90 days	35,724	44,762
Total Past Due	65,291	66,153
Current	9,603,423	8,222,168
Total Legacy Loans, Net of Unearned Income	9,668,714	8,288,321
Recorded Investment > 90 days and Accruing	754	1,075
Non-Covered Legacy Loans [Member] | Commercial Real Estate Construction [Member] | Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	507
Past Due, Greater than 90 days	69	1,803
Total Past Due	576	1,803
Current	483,663	381,292
Total Legacy Loans, Net of Unearned Income	484,239	383,095
Non-Covered Legacy Loans [Member] | Commercial Real Estate - Other [Member] | Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	11,799	6,098
Past Due, 60-89 days	148	5,630
Past Due, Greater than 90 days	6,883	7,650
Total Past Due	18,830	19,378
Current	3,214,989	2,732,431
Total Legacy Loans, Net of Unearned Income	3,233,819	2,751,809
Recorded Investment > 90 days and Accruing		2
Non-Covered Legacy Loans [Member] | Commercial Business [Member] | Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	1,589	2,117
Past Due, 60-89 days	1,860	423
Past Due, Greater than 90 days	3,228	15,020
Total Past Due	6,677	17,560
Current	3,277,463	2,888,491
Total Legacy Loans, Net of Unearned Income	3,284,140	2,906,051
Recorded Investment > 90 days and Accruing	200
Non-Covered Legacy Loans [Member] | Residential Prime [Member] | Residential Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	1,389	1,104
Past Due, 60-89 days	2,616	852
Past Due, Greater than 90 days	11,305	9,684
Total Past Due	15,310	11,640
Current	392,900	286,167
Total Legacy Loans, Net of Unearned Income	408,210	297,807
Recorded Investment > 90 days and Accruing	538	1,073
Non-Covered Legacy Loans [Member] | Residential Subprime [Member] | Residential Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, Greater than 90 days	3,595	1,626
Total Past Due	3,595	1,626
Current	115,889	114,939
Total Legacy Loans, Net of Unearned Income	119,484	116,565
Non-Covered Legacy Loans [Member] | Home Equity [Member] | Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	4,096	1,956
Past Due, 60-89 days	595	569
Past Due, Greater than 90 days	7,420	6,808
Total Past Due	12,111	9,333
Current	1,278,865	1,091,894
Total Legacy Loans, Net of Unearned Income	1,290,976	1,101,227
Recorded Investment > 90 days and Accruing	16
Non-Covered Legacy Loans [Member] | Indirect Automobile [Member] | Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	2,447	1,427
Past Due, 60-89 days	396	293
Past Due, Greater than 90 days	1,419	1,275
Total Past Due	4,262	2,995
Current	392,504	370,388
Total Legacy Loans, Net of Unearned Income	396,766	373,383
Non-Covered Legacy Loans [Member] | Credit Card [Member] | Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	253	266
Past Due, 60-89 days	163	92
Past Due, Greater than 90 days	1,032	411
Total Past Due	1,448	769
Current	71,297	62,873
Total Legacy Loans, Net of Unearned Income	72,745	63,642
Non-Covered Legacy Loans [Member] | Consumer - Other [Member] | Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	1,285	458
Past Due, 60-89 days	424	106
Past Due, Greater than 90 days	773	485
Total Past Due	2,482	1,049
Current	375,853	293,693
Total Legacy Loans, Net of Unearned Income	378,335	294,742
Non-Covered Acquired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	11,537	3,251
Past Due, 60-89 days	3,849	2,580
Past Due, Greater than 90 days	49,470	37,265
Total Past Due	64,856	43,096
Current	1,326,950	506,422
Total Legacy Loans, Net of Unearned Income	1,327,786	483,905
Recorded Investment > 90 days and Accruing	47,603	37,265
Discount	(64,020)	(65,613)
Non-Covered Acquired Loans [Member] | Commercial Real Estate Construction [Member] | Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	2,740	388
Past Due, 60-89 days	57
Past Due, Greater than 90 days	1,284	2,542
Total Past Due	4,081	2,930
Current	26,667	19,833
Total Legacy Loans, Net of Unearned Income	29,578	20,231
Recorded Investment > 90 days and Accruing	1,284	2,542
Discount	(1,170)	(2,532)
Non-Covered Acquired Loans [Member] | Commercial Real Estate - Other [Member] | Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	4,419	1,798
Past Due, 60-89 days	840	1,963
Past Due, Greater than 90 days	26,480	27,967
Total Past Due	31,739	31,728
Current	475,751	345,286
Total Legacy Loans, Net of Unearned Income	468,371	324,838
Recorded Investment > 90 days and Accruing	26,376	27,967
Discount	(39,119)	(52,176)
Non-Covered Acquired Loans [Member] | Commercial Business [Member] | Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	2,106	544
Past Due, 60-89 days	70
Past Due, Greater than 90 days	1,635	1,218
Total Past Due	3,811	1,762
Current	94,962	54,189
Total Legacy Loans, Net of Unearned Income	93,549	53,037
Recorded Investment > 90 days and Accruing	1,635	1,218
Discount	(5,224)	(2,914)
Non-Covered Acquired Loans [Member] | Residential Prime [Member] | Residential Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	152
Past Due, 60-89 days	2,367
Past Due, Greater than 90 days	9,339	226
Total Past Due	11,858	226
Current	418,552	18,796
Total Legacy Loans, Net of Unearned Income	424,579	18,135
Recorded Investment > 90 days and Accruing	8,087	226
Discount	(5,831)	(887)
Non-Covered Acquired Loans [Member] | Home Equity [Member] | Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	649	313
Past Due, 60-89 days	385	516
Past Due, Greater than 90 days	8,774	4,242
Total Past Due	9,808	5,071
Current	216,310	53,995
Total Legacy Loans, Net of Unearned Income	217,699	53,443
Recorded Investment > 90 days and Accruing	8,383	4,242
Discount	(8,419)	(5,623)
Non-Covered Acquired Loans [Member] | Indirect Automobile [Member] | Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	13	33
Past Due, 60-89 days	17
Past Due, Greater than 90 days	9	95
Total Past Due	39	128
Current	393	1,725
Total Legacy Loans, Net of Unearned Income	392	1,853
Recorded Investment > 90 days and Accruing	9	95
Discount	(40)
Non-Covered Acquired Loans [Member] | Consumer - Other [Member] | Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	1,458	175
Past Due, 60-89 days	113	101
Past Due, Greater than 90 days	1,949	975
Total Past Due	3,520	1,251
Current	94,315	12,598
Total Legacy Loans, Net of Unearned Income	93,618	12,368
Recorded Investment > 90 days and Accruing	1,829	975
Discount	$ (4,217)	$ (1,481)

XML

Acquisition and Disposition Activity - Additional Information (Detail) (USD $)	0 Months Ended	12 Months Ended	0 Months Ended
	Jan. 17, 2014 Trust	Dec. 31, 2014	May 31, 2014	Jun. 30, 2014 Branch	Feb. 24, 2014	May 01, 2014	Dec. 31, 2013	Dec. 31, 2012
Business Acquisition [Line Items]
Cash payment to acquire business	$ 91,600,000
Goodwill	8,600,000	517,526,000					401,872,000	401,872,000
Number of branches acquired	4
Maximum period for subject to change estimated fair values after acquisition date		1 year
Florida Bank Group, Inc. [Member]
Business Acquisition [Line Items]
Shares received		0.149
Business combination date of acquisition		Dec. 31, 2014
Cash received per share		$ 7.81
Old Florida Bancshares, Inc. [Member]
Business Acquisition [Line Items]
Shares received		0.34
Business combination date of acquisition		Dec. 31, 2014
Teche [Member]
Business Acquisition [Line Items]
Cash payment to acquire business		714,000
Goodwill		80,429,000	80,400,000
Shares received			1.162
Total consideration paid		156,740,000	156,700,000
Business combination date of acquisition		May 31, 2014
Number of branches		20
Goodwill created in the acquisition deductible for income tax purposes			0
First Private [Member]
Business Acquisition [Line Items]
Cash payment to acquire business		1,000
Goodwill		26,253,000		26,300,000
Shares received				0.27
Total consideration paid		58,640,000		58,600,000
Business combination date of acquisition		Jun. 30, 2014
Number of branches				4
Goodwill created in the acquisition deductible for income tax purposes				0
First Private [Member] | Mobile Branches [Member]
Business Acquisition [Line Items]
Number of branches				2
Georgia Commerce Bancshares Inc [Member]
Business Acquisition [Line Items]
Shares received		0.6134
Business combination date of acquisition		Dec. 31, 2014
Title Company LLC [Member]
Business Acquisition [Line Items]
Cash payment to acquire business					400,000
Goodwill		221,000			200,000
Louisiana Abstract and Title Llc [Member]
Business Acquisition [Line Items]
Cash payment to acquire business						200,000
Goodwill		$ 155,000				$ 200,000

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Transfers and Servicing of Financial Assets (Including Mortgage Banking Activity) - Changes in Carrying Amount of Mortgage Loans Held-for-sale (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Mortgage Banking [Abstract]
Balance at beginning of period	$ 128,442	$ 267,475	$ 153,013
Originations and Purchases	1,675,538	2,116,460	2,432,367
Sales, net of gains	(1,657,409)	(2,255,493)	(2,317,905)
Other	(6,499)
Balance at end of period	$ 140,072	$ 128,442	$ 267,475

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Earnings Per Share - Schedule of Calculation of Basic and Diluted Earnings Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share, Basic And Diluted, By Common Class, Including Two Class Method [Line Items]
Income available to common shareholders	$ 35,936	$ 30,892	$ 16,227	$ 22,395	$ 25,604	$ 23,192	$ 15,590	$ 717	$ 105,450	$ 65,103	$ 76,395
Earnings to common shareholders - basic									103,798	63,897	74,952
Earnings to common shareholders - diluted									103,765	63,894	74,958
Weighted average shares outstanding - basic									31,307	29,052	28,901
Potential common shares									126	53	57
Weighted average shares outstanding - diluted									31,433	29,105	28,958
Weighted average shares outstanding - unvested restricted stock									518	553	553
Earnings per common share - Basic	$ 1.08	$ 0.93	$ 0.53	$ 0.75	$ 0.86	$ 0.78	$ 0.53	$ 0.02	$ 3.32	$ 2.20	$ 2.59
Earnings per common share - Diluted	$ 1.07	$ 0.92	$ 0.53	$ 0.75	$ 0.86	$ 0.78	$ 0.53	$ 0.02	$ 3.30	$ 2.20	$ 2.59
Unvested Restricted Stock [Member]
Earnings Per Share, Basic And Diluted, By Common Class, Including Two Class Method [Line Items]
Earnings to unvested restricted stock									(1,652)	(1,206)	(1,443)
Earnings reallocated to unvested restricted stock									$ (33)	$ (3)	$ 6
Earnings per common share - Basic									$ 3.19	$ 2.18	$ 2.61
Earnings per common share - Diluted									$ 3.13	$ 2.18	$ 2.60

XML

Condensed Parent Company Only Financial Statements - Condensed Statements of Cash Flows (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Parent Company Only Financial Information [Line Items]
Net income	$ 105,450	$ 65,103	$ 76,395
Depreciation and amortization	15,791	25,388	21,685
Loss on sale of assets	(14)	(251)	(42)
Derivative losses on swaps	0	0
Tax benefit associated with share-based payment arrangements	(2,105)	(886)	(1,221)
Other, net	(20,881)	77,792	7,319
Net Cash (Used in) Provided by Operating Activities	119,363	309,783	(12,188)
Cash received in excess of cash paid in acquisition	188,803		32,425
Proceeds from sale of premises and equipment	5,129	8,714	1,274
Purchases of premises and equipment	(29,841)	(16,941)	(32,825)
Net Cash Provided by (Used in) Investing Activities	(712,755)	(1,080,607)	(527,676)
Repayments of long-term debt	(22,871)	(144,609)	(80,770)
Dividends paid to shareholders	(43,070)	(40,332)	(40,069)
Proceeds from sale of treasury stock for stock options exercised	11,693	8,101	2,813
Payments to repurchase common stock	(3,727)	(2,280)	(42,245)
Tax benefit associated with share-based payment arrangements	2,105	886	1,221
Net Cash Provided by Financing Activities	750,091	191,243	937,545
Net (Decrease) Increase in Cash and Cash Equivalents	156,699	(579,581)	397,681
Cash and Cash Equivalents at Beginning of Period	391,396	970,977	573,296
Cash and Cash Equivalents at End of Period	548,095	391,396	970,977
IBERIABANK Corporation [Member]
Parent Company Only Financial Information [Line Items]
Net income	105,450	65,103	76,395
Depreciation and amortization	595	2,035	4,926
Net income of subsidiaries	(107,843)	(73,019)	(98,599)
Noncash compensation expense	11,984	10,704	9,907
Loss on sale of assets			7
Derivative losses on swaps			2
Tax benefit associated with share-based payment arrangements	(2,105)	(886)	(1,221)
Other, net	(27,273)	7,574	(10,557)
Net Cash (Used in) Provided by Operating Activities	(19,192)	11,511	(19,140)
Cash received in excess of cash paid in acquisition	4,783		1,272
Proceeds from sale of premises and equipment		11,751	5
Purchases of premises and equipment	(36)	(5,247)	(4,173)
Capital contributed to subsidiary	(14,600)		(2,000)
Dividends received from subsidiaries		50,511	70,000
Acquisition	0	0	0
Net Cash Provided by (Used in) Investing Activities	(9,853)	57,015	65,104
Repayments of long-term debt			(2,867)
Dividends paid to shareholders	(43,070)	(40,332)	(40,069)
Proceeds from sale of treasury stock for stock options exercised	11,693	8,101	2,813
Payments to repurchase common stock	(3,727)	(2,280)	(42,245)
Common stock issued	0	0	0
Costs of issuance of common stock	0	0	0
Tax benefit associated with share-based payment arrangements	2,105	886	1,221
Net Cash Provided by Financing Activities	(32,999)	(33,625)	(81,147)
Net (Decrease) Increase in Cash and Cash Equivalents	(62,044)	34,901	(35,183)
Cash and Cash Equivalents at Beginning of Period	98,108	63,207	98,390
Cash and Cash Equivalents at End of Period	$ 36,064	$ 98,108	$ 63,207

XML

Loans - Schedule of Troubled Debt Restructurings (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Commercial Loans [Member] | Commercial Real Estate Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Loans, Past Due Greater than 30 Days	$ 0	$ 0
Commercial Loans [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Loans, Current	355	400
Accruing Loans, Past Due Greater than 30 Days	0	0
Nonaccrual TDRs		4,452
Total TDRs	355	4,852
Commercial Loans [Member] | Business [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Loans, Current	1,075	976
Accruing Loans, Past Due Greater than 30 Days	0	0
Nonaccrual TDRs	1,971	13,791
Total TDRs	3,046	14,767
Residential Mortgage Loans [Member] | Residential Prime [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Loans, Past Due Greater than 30 Days	0	0
Residential Mortgage Loans [Member] | Residential Subprime [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Loans, Past Due Greater than 30 Days	0	0
Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Loans, Current	1,430	1,376
Accruing Loans, Past Due Greater than 30 Days	0	0
Nonaccrual TDRs	2,209	18,501
Total TDRs	3,639	19,877
Consumer and Other Loans [Member] | Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Loans, Past Due Greater than 30 Days	0	0
Nonaccrual TDRs	238	258
Total TDRs	238	258
Consumer and Other Loans [Member] | Indirect Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Loans, Past Due Greater than 30 Days	0	0
Consumer and Other Loans [Member] | Credit Card [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Loans, Past Due Greater than 30 Days	0	0
Consumer and Other Loans [Member] | Consumer - Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Loans, Past Due Greater than 30 Days	$ 0	$ 0

XML

Long-Term Debt - Maturities of Long-Term Debt and Advances (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Debt Disclosure [Abstract]
2015	$ 6,941
2016	41,916
2017	101,321
2018	20,741
2019	8,696
2020 and thereafter	223,639
Total long-term debt	$ 403,254	$ 280,699

XML

Condensed Parent Company Only Financial Statements

12 Months Ended

Dec. 31, 2014

Condensed Financial Information of Parent Company Only Disclosure [Abstract]

Condensed Parent Company Only Financial Statements

NOTE 27 – CONDENSED PARENT COMPANY ONLY FINANCIAL STATEMENTS

Condensed financial statements of IBERIABANK Corporation (parent company only) are shown below. The parent company has no significant operating activities.

Condensed Balance Sheets

(Dollars in thousands)	December 31
	2014		2013
Assets
Cash in bank	$	36,064	$	98,108
Investment in subsidiaries		1,842,120		1,487,337
Other assets		119,494		80,528
	$	1,997,678	$	1,665,973
Liabilities and Shareholders’ Equity
Liabilities	$	144,829	$	134,994
Shareholders’ Equity		1,852,849		1,530,979
	$	1,997,678	$	1,665,973

Condensed Statements of Income

(Dollars in thousands)	Year Ended December 31
	2014			2013			2012
Operating income
Dividends from bank subsidiary	$	—		$	49,000		$	70,000
Dividends from non-bank subsidiaries		—			1,511			—
Reimbursement of management expenses		46,433			34,474			94,053
Other income		437			869			(836	)
Total operating income		46,870			85,854			163,217
Operating expenses
Interest expense		3,224			3,232			3,427
Salaries and employee benefits expense		31,981			29,159			76,527
Other expenses		14,576			13,676			47,309
Total operating expenses		49,781			46,067			127,263
Income (loss) before income tax benefit and increase in equity in undistributed earnings of subsidiaries		(2,911	)		39,787			35,954
Income tax benefit		(518	)		(2,808	)		(11,842	)
Income (loss) before equity in undistributed earnings of subsidiaries		(2,393	)		42,595			47,796
Equity in undistributed earnings of subsidiaries		107,843			22,508			28,599
Net income	$	105,450		$	65,103		$	76,395

Condensed Statements of Cash Flows

(Dollars in thousands)	Year Ended December 31
	2014			2013			2012
Cash Flow from Operating Activities
Net income	$	105,450		$	65,103		$	76,395
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		595			2,035			4,926
Net income of subsidiaries		(107,843	)		(73,019	)		(98,599	)
Noncash compensation expense		11,984			10,704			9,907
Loss on sale of assets		—			—			7
Derivative losses on swaps		—			—			2
Tax benefit associated with share-based payment arrangements		(2,105	)		(886	)		(1,221	)
Other, net		(27,273	)		7,574			(10,557	)
Net Cash (Used in) Provided by Operating Activities		(19,192	)		11,511			(19,140	)
Cash Flow from Investing Activities
Cash received in excess of cash paid in acquisition		4,783			—			1,272
Proceeds from sale of premises and equipment		—			11,751			5
Purchases of premises and equipment		(36	)		(5,247	)		(4,173	)
Capital contributed to subsidiary		(14,600	)		—			(2,000	)
Dividends received from subsidiaries		—			50,511			70,000
Acquisition		—			—			—
Net Cash Provided by (Used in) Investing Activities		(9,853	)		57,015			65,104
Cash Flow from Financing Activities
Repayments of long-term debt		—			—			(2,867	)
Dividends paid to shareholders		(43,070	)		(40,332	)		(40,069	)
Proceeds from sale of treasury stock for stock options exercised		11,693			8,101			2,813
Payments to repurchase common stock		(3,727	)		(2,280	)		(42,245	)
Common stock issued		—			—			—
Costs of issuance of common stock		—			—			—
Tax benefit associated with share-based payment arrangements		2,105			886			1,221
Net Cash Used In Financing Activities		(32,999	)		(33,625	)		(81,147	)
Net (Decrease) Increase in Cash and Cash Equivalents		(62,044	)		34,901			(35,183	)
Cash and Cash Equivalents at Beginning of Period		98,108			63,207			98,390
Cash and Cash Equivalents at End of Period	$	36,064		$	98,108		$	63,207

XML

Share-Based Compensation - Compensation Expense of Phantom Stock (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense related to phantom stock	$ 2,053	$ 2,110	$ 1,873
Phantom Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense related to phantom stock	$ 5,496	$ 4,855	$ 2,185

XML

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2014

Income Tax Disclosure [Abstract]

Schedule of Provision for Income Tax Expense

The provision for income tax expense consists of the following for the years ended December 31:

(Dollars in thousands)	2014			2013			2012
Current expense	$	69,612		$	62,468		$	44,125
Deferred benefit		(24,955	)		(35,943	)		(7,527	)
Tax credits		(12,012	)		(11,690	)		(8,756	)
Tax benefits attributable to items charged to equity and goodwill		2,105			1,034			654
	$	34,750		$	15,869		$	28,496

Reconciliation of Effective Tax Rate

 The provision for federal income taxes differs from the amount computed by applying the federal income tax statutory rate of 35 percent on income before income tax expense as indicated in the following analysis for the years ended December 31:

(Dollars in thousands)	2014			2013			2012
Federal tax based on statutory rate	$	49,070		$	28,340		$	36,712
Increase (decrease) resulting from:
Effect of tax-exempt income		(7,064	)		(7,282	)		(7,558	)
Interest and other nondeductible expenses		2,642			2,007			1,847
State taxes, net of federal Benefit		2,531			3,237			4,938
Tax credits		(12,012	)		(11,690	)		(8,756	)
Other		(417	)		1,257			1,313
	$	34,750		$	15,869		$	28,496
Effective tax rate		24.8	%		19.6	%		27.2	%

Deferred Tax Assets and Liabilities

The net deferred tax asset at December 31 is as follows:

(Dollars in thousands)
	2014			2013
Deferred tax asset:
NOL carryforward	$	978		$	1,001
Allowance for credit losses		59,267			85,101
Deferred compensation		6,631			6,315
Basis difference in acquired assets		53,202			70,136
Unrealized loss on available for sale investments		—			8,880
OREO		9,845			31,943
Other		13,530			19,509
		143,453			222,885
Deferred tax liability:
Basis difference in acquired assets		(53,940	)		(130,426	)
Gain on acquisition		(2,426	)		(17,693	)
FHLB stock		(85	)		(36	)
Premises and equipment		(9,652	)		(10,209	)
Acquisition intangibles		(12,151	)		(12,113	)
Deferred loan costs		(3,771	)		(2,915	)
Unrealized gain on available for sale investments		(4,052	)		—
Investments acquired		(570	)		(235	)
Swap gain		(75	)		(75	)
Other		(12,908	)		(11,089	)
		(99,630	)		(184,791	)
Net deferred tax asset	$	43,823		$	38,094

XML

Deposits

12 Months Ended

Dec. 31, 2014

Banking and Thrift [Abstract]

Deposits

NOTE 14 – DEPOSITS

Deposits at December 31 are summarized as follows:

(Dollars in thousands)	2014		2013
Non-interest-bearing deposits	$	3,195,430	$	2,575,939
Negotiable order of withdrawal (NOW)		2,462,841		2,283,491
Money market deposits accounts (MMDA)		4,168,504		3,779,581
Savings deposits		577,513		387,397
Certificates of deposit and other time deposits		2,116,237		1,710,592
	$	12,520,525	$	10,737,000

Total time deposits summarized by denomination at December 31 are as follows:

(Dollars in thousands)	2014		2013
Time deposits less than $100,000	$	1,035,438	$	804,250
Time deposits greater than $100,000		1,080,799		906,342
	$	2,116,237	$	1,710,592

A schedule of maturities of all certificates of deposit as of December 31, 2014 is as follows:

(Dollars in thousands)
Years ending December 31
2015	$	1,297,125
2016		493,944
2017		171,884
2018		57,580
2019		49,967
2020 and thereafter		45,737
	$	2,116,237

XML

Other Real Estate Owned - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jun. 30, 2013 Branch	Dec. 31, 2014	Jun. 30, 2014 Branch	Dec. 31, 2013
Statement of Financial Position [Abstract]
Company announced plans to close branches	10
Number of branches closed			9
Book value of company's closed branches after impairment losses		$ 3.0		$ 5.1

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Capital Requirements and Other Regulatory Matters

12 Months Ended

Dec. 31, 2014

Banking and Thrift [Abstract]

Capital Requirements and Other Regulatory Matters

NOTE 19 – CAPITAL REQUIREMENTS AND OTHER REGULATORY MATTERS

The Company and IBERIABANK are subject to various regulatory capital requirements administered by the federal and state banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s consolidated financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and IBERIABANK, as applicable, must meet specific capital guidelines that involve quantitative measures of their assets, liabilities and certain off-balance sheet items as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors.

Quantitative measures established by regulation to ensure capital adequacy require the Company and IBERIABANK to maintain minimum amounts and ratios of total and Tier 1 capital to risk-weighted assets and of Tier 1 capital to average assets. Management believes, as of December 31, 2014 and 2013, that the Company and IBERIABANK met all capital adequacy requirements to which they are subject.

As of December 31, 2014, the most recent notification from the FDIC categorized IBERIABANK as well capitalized under the regulatory framework for prompt corrective action (the prompt corrective action requirements are not applicable to the Company). To be categorized as well capitalized, an institution must maintain minimum total risk-based, Tier 1 risk-based and Tier 1 leverage ratios as set forth in the following table. There are no conditions or events since the notification that management believes have changed that categorization. The Company’s and IBERIABANK’s actual capital amounts and ratios as of December 31 are presented in the following table.

(Dollars in thousands)	2014
	Minimum					Well Capitalized					Actual
	Amount		Ratio			Amount		Ratio			Amount		Ratio
Tier 1 Leverage
Consolidated	$	602,387		4.00	%	$	N/A		N/A	%	$	1,408,842		9.36	%
IBERIABANK		600,149		4.00			750,186		5.00			1,266,241		8.44
Tier 1 risk-based capital
Consolidated	$	504,114		4.00	%	$	N/A		N/A	%	$	1,408,842		11.18	%
IBERIABANK		502,421		4.00			753,631		6.00			1,266,241		10.08
Total risk-based capital
Consolidated	$	1,008,227		8.00	%	$	N/A		N/A	%	$	1,550,789		12.31	%
IBERIABANK		1,004,841		8.00			1,256,052		10.00			1,408,188		11.21
	2013
	Minimum					Well Capitalized					Actual
	Amount		Ratio			Amount		Ratio			Amount		Ratio
Tier 1 Leverage
Consolidated	$	507,760		4.00	%	$	N/A		N/A	%	$	1,231,886		9.70	%
IBERIABANK		505,723		4.00			632,154		5.00			1,069,783		8.46
Tier 1 risk-based capital
Consolidated	$	426,002		4.00	%	$	N/A		N/A	%	$	1,231,886		11.57	%
IBERIABANK		424,578		4.00			636,868		6.00			1,069,783		10.08
Total risk-based capital
Consolidated	$	852,005		8.00	%	$	N/A		N/A	%	$	1,365,280		12.82	%
IBERIABANK		849,157		8.00			1,061,446		10.00			1,202,738		11.33

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Allowance for Credit Losses and Credit Quality - Schedule of Allowance for Loan Losses for Covered Loan and Non-Covered Loan Portfolios (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	$ 143,074	$ 251,603	$ 193,761
(Reversal of) Provision for loan losses before adjustment attributable to FDIC loss share agreements	14,800	(50,940)	104,756
Adjustment attributable to FDIC loss share arrangements	4,260	56,085	(84,085)
Net (reversal of) provision for loan losses	19,060	5,145	20,671
Adjustment attributable to FDIC loss share arrangements	(4,260)	(56,085)	84,085
Transfer of balance to OREO	(7,323)	(28,126)	(27,169)
Transfer of balance to the RULC		(9,828)
Loans charged-off	(26,855)	(26,481)	(25,060)
Recoveries	6,435	6,846	5,315
Balance at end of period	130,131	143,074	251,603
Balance at beginning of period	11,147
Transfer of balance from the allowance for loan losses		9,828
Provision for unfunded lending commitments	654	1,319
Balance at end of period	11,801	11,147
Non-Covered Legacy Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	67,342	74,211	74,861
(Reversal of) Provision for loan losses before adjustment attributable to FDIC loss share agreements	14,274	6,828	3,804
Net (reversal of) provision for loan losses	14,274	6,828	3,804
Transfer of balance to the RULC		(9,828)
Loans charged-off	(11,312)	(10,686)	(9,728)
Recoveries	5,870	6,817	5,274
Balance at end of period	76,174	67,342	74,211
Balance at beginning of period	11,147
Transfer of balance from the allowance for loan losses		9,828
Provision for unfunded lending commitments	654	1,319
Balance at end of period	11,801	11,147
Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	4,557	8,816
(Reversal of) Provision for loan losses before adjustment attributable to FDIC loss share agreements	(1,546)	(3,158)	9,799
Net (reversal of) provision for loan losses	(1,546)	(3,158)	9,799
Transfer of balance to OREO	(933)	(1,085)	(826)
Transfer of balance to non-covered	8,661
Loans charged-off	(2,073)	(31)	(179)
Recoveries	527	15	22
Balance at end of period	9,193	4,557	8,816
Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	71,175	168,576	118,900
(Reversal of) Provision for loan losses before adjustment attributable to FDIC loss share agreements	2,072	(54,610)	91,153
Adjustment attributable to FDIC loss share arrangements	4,260	56,085	(84,085)
Net (reversal of) provision for loan losses	6,332	1,475	7,068
Adjustment attributable to FDIC loss share arrangements	(4,260)	(56,085)	84,085
Transfer of balance to OREO	(6,390)	(27,041)	(26,343)
Transfer of balance to non-covered	(8,661)
Loans charged-off	(13,470)	(15,764)	(15,153)
Recoveries	38	14	19
Balance at end of period	$ 44,764	$ 71,175	$ 168,576

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Short-Term Borrowings (Tables)

12 Months Ended

Dec. 31, 2014

Debt Disclosure [Abstract]

Summary of Short-Term Borrowings

Short-term borrowings at December 31 are summarized as follows:

(Dollars in thousands)	2014		2013
Federal Home Loan Bank advances	$	603,000	$	375,000
Securities sold under agreements to repurchase		242,742		305,344
	$	845,742	$	680,344

Additional Information on Short-Term Borrowings

Additional information on the Company’s short-term borrowings for the years indicated is as follows:

(Dollars in thousands)	2014			2013			2012
Outstanding at December 31	$	845,742		$	680,344		$	303,045
Maximum month-end outstanding balance		1,034,741			680,344			640,768
Average daily outstanding balance		782,033			303,352			284,201
Average rate during the year		0.17	%		0.16	%		0.22	%
Average rate at year end		0.18	%		0.15	%		0.22	%

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Transfers and Servicing of Financial Assets (Including Mortgage Banking Activity) - Schedule of Related Amortization Expense of Mortgage Servicing Rights (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule Of Identifiable Intangible Assets Acquired As Part Of Business Combination [Line Items]
Aggregate amortization expense	$ 5,807	$ 4,720	$ 5,150
2015	5,646
2016	5,187
2017	3,586
2018	2,597
2019	1,877
2020 and thereafter	1,468
Mortgage Servicing Rights [Member]
Schedule Of Identifiable Intangible Assets Acquired As Part Of Business Combination [Line Items]
Aggregate amortization expense	759	480	225
2015	1,550
2016	697
2017	531
2018	371
2019	230
2020 and thereafter	$ 119

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Allowance for Credit Losses and Credit Quality (Tables)

12 Months Ended

Dec. 31, 2014

Schedule of Allowance for Loan Losses for Covered Loan and Non-Covered Loan Portfolios

A summary of changes in the allowance for credit losses for the covered loan and non-covered loan portfolios for the years ended December 31 is as follows:

	2014
	Non-covered loans
(Dollars in thousands)	Legacy Loans			Acquired Loans			Covered Loans			Total
Allowance for credit losses
Balance at beginning of period	$	67,342		$	4,557		$	71,175		$	143,074
(Reversal of) Provision for loan losses before benefit attributable to FDIC loss share agreements		14,274			(1,546	)		2,072			14,800
Adjustment attributable to FDIC loss share arrangements		—			—			4,260			4,260
Net (reversal of) provision for loan losses		14,274			(1,546	)		6,332			19,060
Adjustment attributable to FDIC loss share arrangements		—			—			(4,260	)		(4,260	)
Transfer of balance to OREO		—			(933	)		(6,390	)		(7,323	)
Transfer of balance to non-covered		—			8,661			(8,661	)		—
Loans charged-off		(11,312	)		(2,073	)		(13,470	)		(26,855	)
Recoveries		5,870			527			38			6,435
Balance at end of period	$	76,174		$	9,193		$	44,764		$	130,131
Reserve for unfunded lending commitments
Balance, beginning of period	$	11,147		$	—		$	—		$	11,147
Provision for unfunded lending commitments		654			—			—			654
Balance at end of period	$	11,801		$	—		$	—		$	11,801
	2013
	Non-covered loans
	Legacy Loans			Acquired Loans			Covered Loans			Total
Allowance for loan losses
Balance at beginning of period	$	74,211		$	8,816		$	168,576		$	251,603
(Reversal of) Provision for loan losses before adjustment attributable to FDIC loss share agreements		6,828			(3,158	)		(54,610	)		(50,940	)
Adjustment attributable to FDIC loss share arrangements		—			—			56,085			56,085
Net (reversal of) provision for loan losses		6,828			(3,158	)		1,475			5,145
Adjustment attributable to FDIC loss share arrangements		—			—			(56,085	)		(56,085	)
Transfer of balance to OREO		—			(1,085	)		(27,041	)		(28,126	)
Transfer of balance to the RULC		(9,828	)		—			—			(9,828	)
Loans charged-off		(10,686	)		(31	)		(15,764	)		(26,481	)
Recoveries		6,817			15			14			6,846
Balance at end of period		67,342			4,557		$	71,175		$	143,074
Reserve for unfunded lending commitments
Balance, beginning of period		—			—			—			—
Transfer of balance from the allowance for loan losses		9,828			—			—			9,828
Provision for unfunded lending commitments		1,319			—			—			1,319
Balance at end of period	$	11,147		$	—		$	—		$	11,147

	2012
	Non-covered loans
	Legacy Loans			Acquired Loans			Covered Loans			Total
Allowance for loan losses
Balance at beginning of period	$	74,861		$	—		$	118,900		$	193,761
Provision for loan losses before adjustment attributable to FDIC loss share agreements		3,804			9,799			91,153			104,756
Adjustment attributable to FDIC loss share arrangements		—			—			(84,085	)		(84,085	)
Net provision for loan losses		3,804			9,799			7,068			20,671
Adjustment attributable to FDIC loss share arrangements		—			—			84,085			84,085
Transfer of balance to OREO		—			(826	)		(26,343	)		(27,169	)
Loans charged-off		(9,728	)		(179	)		(15,153	)		(25,060	)
Recoveries		5,274			22			19			5,315
Balance at end of period	$	74,211		$	8,816		$	168,576		$	251,603

Schedule of Allowance for Loan Losses for Non-Covered Loans, by Loan Portfolio

A summary of changes in the allowance for credit losses for non-covered loans, by loan portfolio type, for the years ended December 31 is as follows:

	2014
(Dollars in thousands)	Commercial Real Estate			Commercial Business			Residential Mortgage			Consumer			Total
Allowance for loan losses
Balance at beginning of period	$	26,590		$	28,515		$	2,546		$	14,248		$	71,899
(Reversal of) Provision for loan losses		(295	)		4,302			694			8,027			12,728
Transfer of balance to OREO		—			(868	)		—			(65	)		(933	)
Transfer of balance to non-covered		6,009			1,699			—			953			8,661
Loans charged off		(2,247	)		(1,659	)		(613	)		(8,866	)		(13,385	)
Recoveries		2,964			105			248			3,080			6,397
Balance at end of period	$	33,021		$	32,094		$	2,875		$	17,377		$	85,367
Reserve for unfunded commitments
Balance at beginning of period	$	3,089		$	4,839		$	72		$	3,147		$	11,147
(Reversal of) Provision for unfunded commitments		350			421			96			(213	)		654
Balance at end of period	$	3,439		$	5,260		$	168		$	2,934		$	11,801
Allowance on loans individually evaluated for impairment	$	20		$	407		$	—		$	3		$	430
Allowance on loans collectively evaluated for impairment		33,001			31,687			2,875			17,374			84,939
Loans, net of unearned income:
Balance at end of period	$	4,216,007		$	3,377,689		$	952,273		$	2,450,531		$	10,996,500
Balance at end of period individually evaluated for impairment		7,013			3,988			—			699			11,700
Balance at end of period collectively evaluated for impairment		4,186,968			3,369,982			936,604			2,438,569			10,932,123
Balance at end of period acquired with deteriorated credit quality		22,026			3,719			15,669			11,263			52,677

	2013
	Commercial			Commercial			Residential
(Dollars in thousands)	Real Estate			Business			Mortgage			Consumer			Total
Allowance for credit losses
Balance at beginning of period	$	38,264		$	28,721		$	2,125		$	13,917		$	83,027
(Reversal of) Provision for loan losses		(8,830	)		3,543			860			8,097			3,670
Transfer of balance to OREO		(319	)		(113	)		(646	)		(7	)		(1,085	)
Transfer of balance to the RULC		(2,939	)		(3,497	)		(40	)		(3,352	)		(9,828	)
Loans charged off		(2,940	)		(516	)		(518	)		(6,743	)		(10,717	)
Recoveries		3,354			377			765			2,336			6,832
Balance at end of period	$	26,590		$	28,515		$	2,546		$	14,248		$	71,899
Reserve for unfunded commitments
Balance at beginning of period	$	—		$	—		$	—		$	—		$	—
Transfer of balance from the allowance for loan losses		2,939			3,497			40			3,352			9,828
Provision for unfunded commitments		150			1,342			32			(205	)		1,319
Balance at end of period	$	3,089		$	4,839		$	72		$	3,147		$	11,147
Allowance on loans individually evaluated for impairment	$	8		$	841		$	180		$	—		$	1,029
Allowance on loans collectively evaluated for impairment		26,582			27,674			2,366			14,248			70,870
Loans, net of unearned income:
Balance at end of period	$	3,479,973		$	2,959,088		$	432,507		$	1,900,658		$	8,772,226
Balance at end of period individually evaluated for impairment		8,705			15,812			1,407			258			26,182
Balance at end of period collectively evaluated for impairment		3,459,028			2,943,246			430,974			1,899,013			8,732,261
Balance at end of period acquired with deteriorated credit quality		12,240			30			126			1,387			13,783
	2012
	Commercial			Commercial			Residential
(Dollars in thousands)	Real estate			Business			Mortgage			Consumer			Total
Allowance for credit losses
Balance at beginning of period	$	35,604		$	25,705		$	897		$	12,655		$	74,861
(Reversal of) Provision for loan losses		1,786			4,021			2,578			5,218			13,603
Transfer of balance to OREO		(292	)		—			(525	)		(9	)		(826	)
Loans charged off		(2,000	)		(1,116	)		(863	)		(5,928	)		(9,907	)
Recoveries		3,166			111			38			1,981			5,296
Balance at end of period	$	38,264		$	28,721		$	2,125		$	13,917		$	83,027
Allowance on loans individually evaluated for impairment	$	226		$	449		$	163		$	42		$	880
Allowance on loans collectively evaluated for impairment		38,038			28,272			1,962			13,875			82,147
Loans, net of unearned income:
Balance at end of period	$	2,990,700		$	2,450,667		$	290,040		$	1,674,417		$	7,405,824
Balance at end of period individually evaluated for impairment		28,052			4,401			1,703			315			34,471
Balance at end of period collectively evaluated for impairment		2,906,792			2,442,796			288,007			1,669,067			7,306,662
Balance at end of period acquired with deteriorated credit quality		55,856			3,470			330			5,035			64,691

Schedule of Allowance for Loan Losses for Covered Loans, by Loan Portfolio

A summary of changes in the allowance for credit losses for covered loans, by loan portfolio type, for the years ended December 31 is as follows:

	2014
(Dollars in thousands)	Commercial Real Estate			Commercial Business			Residential Mortgage			Consumer			Total
Allowance for loan losses
Balance at beginning of period	$	38,772		$	5,380		$	10,889		$	16,134		$	71,175
(Reversal of) Provision for loan losses		3,058			399			1,168			1,707			6,332
(Decrease) Increase in FDIC loss share receivable		227			509			(3,854	)		(1,142	)		(4,260	)
Transfer of balance to OREO		(1,897	)		(1,162	)		(1,719	)		(1,612	)		(6,390	)
Transfer of balance to non-covered		(6,009	)		(1,699	)		—			(953	)		(8,661	)
Loans charged off		(10,117	)		(2,192	)		(198	)		(963	)		(13,470	)
Recoveries		38			—			—			—			38
Balance at end of period	$	24,072		$	1,235		$	6,286		$	13,171		$	44,764
Allowance on loans individually evaluated for impairment	$	—		$	—		$	—		$	—		$	—
Allowance on loans collectively evaluated for impairment		24,072			1,235			6,286			13,171			44,764
Loans, net of unearned income:
Balance at end of period	$	189,126		$	31,260		$	128,024		$	96,134		$	444,544
Balance at end of period individually evaluated for impairment		—			—			—			—			—
Balance at end of period collectively evaluated for impairment		187,873			31,260			105,106			82,773			407,012
Balance at end of period acquired with deteriorated credit quality		1,253			—			22,918			13,361			37,532
	2013
(Dollars in thousands)	Commercial Real Estate			Commercial Business			Residential Mortgage			Consumer			Total
Allowance for credit losses
Balance at beginning of period	$	100,871		$	11,375		$	22,566		$	33,764		$	168,576
(Reversal of) Provision for loan losses		1,523			(649	)		286			315			1,475
(Decrease) Increase in FDIC loss share receivable		(28,238	)		(5,032	)		(4,896	)		(17,919	)		(56,085	)
Transfer of balance to OREO		(19,634	)		(314	)		(7,067	)		(26	)		(27,041	)
Loans charged off		(15,764	)		—			—			—			(15,764	)
Recoveries		14			—			—			—			14
Balance at end of period	$	38,772		$	5,380		$	10,889		$	16,134		$	71,175
Allowance on loans individually evaluated for impairment	$	—		$	—		$	—		$	—		$	—
Allowance on loans collectively evaluated for impairment		38,772			5,380			10,889			16,134			71,175
Loans, net of unearned income:
Balance at end of period	$	387,332		$	37,025		$	154,025		$	141,411		$	719,793
Balance at end of period individually evaluated for impairment		—			—			—			—			—
Balance at end of period collectively evaluated for impairment		372,428			37,025			125,802			118,461			653,716
Balance at end of period acquired with deteriorated credit quality		14,904			—			28,223			22,950			66,077

	2012
(Dollars in thousands)	Commercial Real estate			Commercial business			Residential Mortgage			Consumer			Total
Allowance for credit losses
Balance at beginning of period	$	69,175		$	9,788		$	21,184		$	18,753		$	118,900
(Reversal of) Provision for loan losses		4,970			964			323			811			7,068
(Decrease) Increase in FDIC loss share receivable		51,543			3,616			13,895			15,031			84,085
Transfer of balance to OREO		(11,202	)		(2,993	)		(11,323	)		(825	)		(26,343	)
Loans charged off		(13,631	)		—			(1,513	)		(9	)		(15,153	)
Recoveries		16			—			—			3			19
Balance at end of period	$	100,871		$	11,375		$	22,566		$	33,764		$	168,576
Allowance on loans individually evaluated for impairment	$	—		$	—		$	—		$	—		$	—
Allowance on loans collectively evaluated for impairment		100,871			11,375			22,566			33,764			168,576
Loans, net of unearned income:
Balance at end of period	$	640,843		$	87,051		$	187,164		$	177,698		$	1,092,756
Balance at end of period individually evaluated for impairment		—			—			—			—			—
Balance at end of period collectively evaluated for impairment		473,101			84,294			166,932			154,784			879,111
Balance at end of period acquired with deteriorated credit quality		167,742			2,757			20,232			22,914			213,645

Investment in Covered Loans and Non-Covered Loans by Credit Quality Indicator

Credit quality information in the tables below includes loans acquired at the gross loan balance, prior to the application of premiums/discounts, at December 31, 2014 and 2013.

	Legacy loans
	December 31, 2014										December 31, 2013
(Dollars in thousands)	Pass		Special Mention		Sub- standard		Doubtful		Total		Pass		Special Mention		Sub- standard		Doubtful		Total
Commercial real estate - Construction	$	483,930	$	240	$	69	$	—	$	484,239	$	370,824	$	9,309	$	2,962	$	—	$	383,095
Commercial real estate - Other		3,161,593		49,847		22,217		162		3,233,819		2,694,161		27,227		30,308		113		2,751,809
Commercial business		3,245,912		7,330		28,965		1,933		3,284,140		2,866,794		6,164		32,167		926		2,906,051
Total	$	6,891,435	$	57,417	$	51,251	$	2,095	$	7,002,198	$	5,931,779	$	42,700	$	65,437	$	1,039	$	6,040,955

	Legacy loans
	December 31, 2014						December 31, 2013
(Dollars in thousands)	Current		30+ Days Past Due		Total		Current		30+ Days Past Due		Total
Residential mortgage - Prime	$	392,900	$	15,310	$	408,210	$	286,167	$	11,640	$	297,807
Residential mortgage - Subprime		115,889		3,595		119,484		114,939		1,626		116,565
Consumer - Home equity		1,278,865		12,111		1,290,976		1,091,894		9,333		1,101,227
Consumer - Indirect automobile		392,504		4,262		396,766		370,388		2,995		373,383
Consumer - Credit card		71,297		1,448		72,745		62,873		769		63,642
Consumer - Other		375,853		2,482		378,335		293,693		1,049		294,742
Total	$	2,627,308	$	39,208	$	2,666,516	$	2,219,954	$	27,412	$	2,247,366

Schedule of Investment in Legacy Impaired Loan

Information on the Company’s investment in legacy impaired loans is presented in the following tables as of and for the periods indicated.

	December 31, 2014
(Dollars in thousands)	Recorded Investment		Unpaid Principal Balance		Related Allowance			Average Recorded Investment		Interest Income Recognized
With no related allowance recorded:
Commercial real estate	$	6,680	$	6,680	$	—		$	6,703	$	132
Commercial business		2,483		2,483		—			2,873		57
Consumer - Home equity		682		682		—			696		19
With an allowance recorded:
Commercial real estate		1,068		1,093		(25	)		1,158		39
Commercial business		1,212		1,620		(408	)		2,117		23
Residential mortgage - Prime		10,532		10,768		(236	)		10,577		11
Residential mortgage - Subprime		3,579		3,595		(16	)		3,686		99
Consumer - Home equity		7,121		7,165		(44	)		7,544		43
Consumer - Indirect automobile		1,410		1,419		(9	)		2,016		51
Consumer - Credit card		1,012		1,032		(20	)		797		—
Consumer - Other		781		790		(9	)		1,009		39
Total	$	36,560	$	37,327	$	(767	)	$	39,176	$	513
Total commercial loans	$	11,443	$	11,876	$	(433	)	$	12,851	$	251
Total mortgage loans		14,111		14,363		(252	)		14,263		110
Total consumer loans		11,006		11,088		(82	)		12,062		152

	December 31, 2013
(Dollars in thousands)	Recorded Investment		Unpaid Principal Balance		Related Allowance			Average Recorded Investment		Interest Income Recognized
With no related allowance recorded:
Commercial real estate	$	8,567	$	8,567	$	—		$	10,443	$	43
Commercial business		13,256		13,256		—			11,074		170
Consumer - Home equity		258		258		—			281		1
With an allowance recorded:
Commercial real estate		1,268		1,284		(16	)		4,414		8
Commercial business		1,927		2,770		(843	)		2,892		100
Residential mortgage - Prime		9,791		10,019		(228	)		8,096		98
Residential mortgage - Subprime		1,617		1,626		(9	)		1,579		—
Consumer - Home equity		6,506		6,550		(44	)		7,593		93
Consumer - Indirect automobile		1,267		1,275		(8	)		2,090		55
Consumer - Credit card		404		411		(7	)		418		—
Consumer - Other		481		485		(4	)		765		19
Total	$	45,342	$	46,501	$	(1,159	)	$	49,645	$	587
Total commercial loans	$	25,018	$	25,877	$	(859	)	$	28,823	$	321
Total mortgage loans		11,408		11,645		(237	)		9,675		98
Total consumer loans		8,916		8,979		(63	)		11,147		168

Covered Loans [Member]

Investment in Covered Loans and Non-Covered Loans by Credit Quality Indicator

Non-covered acquired loans
	December 31, 2014													December 31, 2013
(Dollars in thousands)	Pass		Special Mention		Substandard		Doubtful		Discount			Total		Pass		Special Mention		Substandard		Doubtful		Discount			Total
Commercial real estate - Construction	$	24,118	$	2,006	$	4,624	$	—	$	(1,170	)	$	29,578	$	21,244	$	—	$	1,519	$	—	$	(2,532	)	$	20,231
Commercial real estate - Other		445,557		12,794		49,139		—		(39,119	)		468,371		350,412		5,096		21,413		93		(52,176	)		324,838
Commercial business		91,837		1,861		4,818		257		(5,224	)		93,549		53,533		517		1,901		—		(2,914	)		53,037
Total	$	561,512	$	16,661	$	58,581	$	257	$	(45,513	)	$	591,498	$	425,189	$	5,613	$	24,833	$	93	$	(57,622	)	$	398,106

	Non-covered acquired loans
	December 31, 2014									December 31, 2013
(Dollars in thousands)	Current		30+ Days Past Due		Premium (discount)			Total		Current		30+ Days Past Due		Premium (discount)			Total
Residential mortgage - Prime	$	418,552	$	11,858	$	(5,831	)	$	424,579	$	18,796	$	226	$	(887	)	$	18,135
Consumer - Home equity		216,310		9,808		(8,419	)		217,699		53,995		5,071		(5,623	)		53,443
Consumer - Indirect automobile		393		39		(40	)		392		1,725		128		—			1,853
Consumer - Other		94,315		3,520		(4,217	)		93,618		12,598		1,251		(1,481	)		12,368
Total	$	729,570	$	25,225	$	(18,507	)	$	736,288	$	87,114	$	6,676	$	(7,991	)	$	85,799

Acquired Loans [Member]

Investment in Covered Loans and Non-Covered Loans by Credit Quality Indicator

The Company’s investment in covered loans by credit quality indicator is presented in the following table. Loan premiums/discounts in the tables below represent the adjustment of covered loans to net book value before allowance at the reporting date.

	Covered loans
	December 31, 2014											December 31, 2013
(Dollars in thousands)	Pass		Special Mention		Substandard		Doubtful		Total			Pass		Special Mention		Substandard		Doubtful		Total
Commercial real estate - Construction	$	34,731	$	1,928	$	8,008	$	—	$	44,667		$	42,886	$	7,401	$	23,891	$	497	$	74,675
Commercial real estate - Other		87,509		20,422		51,252		—		159,183			148,579		49,699		144,680		3,267		346,225
Commercial business		23,380		395		9,275		—		33,050			30,710		780		14,556		984		47,030
	$	145,620	$	22,745	$	68,535	$	—	$	236,900		$	222,175	$	57,880	$	183,127	$	4,748	$	467,930
Discount										(16,514	)										(43,573	)
Total									$	220,386										$	424,357

	Covered loans
	December 31, 2014									December 31, 2013
(Dollars in thousands)	Current		30+ Days Past Due		Premium (discount)			Total		Current		30+ Days Past Due		Premium (discount)			Total
Residential prime	$	140,628	$	22,058	$	(34,662	)	$	128,024	$	158,710	$	30,814	$	(35,499	)	$	154,025
Consumer - Home equity		99,478		16,542		(23,590	)		92,430		143,236		35,811		(41,925	)		137,122
Consumer - Credit card		614		34		—			648		648		31		—			679
Consumer - Other		337		18		2,701			3,056		591		144		2,875			3,610
Total	$	241,057	$	38,652	$	(55,551	)	$	224,158	$	303,185	$	66,800	$	(74,549	)	$	295,436

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Premises and Equipment - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 19.4	$ 19.6	$ 18.3
Maximum lease term	5 years
Average lease income	0.1
Total lease income	1.6	1.5	1.6
Maximum lease renewal period	50 years
Rent expense	10.7	11.4	10.6
Minimum [Member]
Property, Plant and Equipment [Line Items]
Operating leases in terms of years	1 year
Maximum [Member]
Property, Plant and Equipment [Line Items]
Operating leases in terms of years	50 years
Buildings [Member]
Property, Plant and Equipment [Line Items]
Total allocated cost of portion of buildings held for lease	7.6	9.5
Accumulated depreciation	$ 2.4	$ 3.0

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Consolidated Statements of Shareholders' Equity (USD $) In Thousands, except Share data	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]
Beginning balance at Dec. 31, 2011	$ 1,482,661	$ 31,163	$ 1,135,880	$ 375,184	$ 24,457	$ (84,023)
Beginning balance, Shares at Dec. 31, 2011		31,163,070				1,789,165
Net income	76,395			76,395
Other comprehensive income	20				20
Cash dividends declared, $1.36 per share	(40,107)			(40,107)
Reissuance of treasury stock under incentive plans, net of shares surrendered in payment, including tax benefit	2,222		(354)			2,576
Reissuance of treasury stock under incentive plans, Shares						(51,328)
Common stock issued for acquisitions	39,203	754	38,449
Common stock issued for acquisitions, Shares		754,315
Treasury stock issued for recognition and retention plans			(7,702)			7,702
Treasury stock issued for recognition and retention plans, Shares						(163,505)
Share-based compensation cost	9,907		9,907
Treasury stock acquired at cost	(40,433)					(40,433)
Treasury stock acquired at cost, Shares						853,308
Ending balance at Dec. 31, 2012	1,529,868	31,917	1,176,180	411,472	24,477	(114,178)
Ending balance, Shares at Dec. 31, 2012		31,917,385				2,427,640
Net income	65,103			65,103
Other comprehensive income	(40,968)				(40,968)
Cash dividends declared, $1.36 per share	(40,434)			(40,434)
Reissuance of treasury stock under incentive plans, net of shares surrendered in payment, including tax benefit	6,707		(607)			7,314
Reissuance of treasury stock under incentive plans, Shares						(147,392)
Treasury stock issued for recognition and retention plans			(7,992)			7,992
Treasury stock issued for recognition and retention plans, Shares						(149,407)
Share-based compensation cost	10,703		10,703
Ending balance at Dec. 31, 2013	1,530,979	31,917	1,178,284	436,141	(16,491)	(98,872)
Ending balance, Shares at Dec. 31, 2013		31,917,385				2,130,841
Net income	105,450			105,450
Other comprehensive income	24,016				24,016
Cash dividends declared, $1.36 per share	(44,317)			(44,317)
Reissuance of treasury stock under incentive plans, net of shares surrendered in payment, including tax benefit	10,071		3,242			6,829
Reissuance of treasury stock under incentive plans, Shares						(190,443)
Common stock issued for acquisitions	214,665	3,346	211,319
Common stock issued for acquisitions, Shares		3,345,516
Treasury stock issued for recognition and retention plans			(6,197)			6,197
Treasury stock issued for recognition and retention plans, Shares						(130,901)
Share-based compensation cost	11,985		11,985
Ending balance at Dec. 31, 2014	$ 1,852,849	$ 35,263	$ 1,398,633	$ 497,274	$ 7,525	$ (85,846)
Ending balance, Shares at Dec. 31, 2014		35,262,901				1,809,497

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Loans - Schedule of Carrying Amount of Acquired Covered Loans (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Impaired Loans	$ 37,532	$ 66,077
Acquired Performing Loans	407,012	653,716
Balance at end of period	444,544	719,793
Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Impaired Loans	1,253	14,904
Acquired Performing Loans	219,133	409,453
Balance at end of period	220,386	424,357
Commercial Loans [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Impaired Loans	1,253	14,904
Acquired Performing Loans	187,873	372,428
Balance at end of period	189,126	387,332
Commercial Loans [Member] | Business [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Performing Loans	31,260	37,025
Balance at end of period	31,260	37,025
Residential Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Impaired Loans	22,918	28,223
Acquired Performing Loans	105,106	125,802
Balance at end of period	128,024	154,025
Residential Mortgage Loans [Member] | Residential 1-4 Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Impaired Loans	22,918	28,223
Acquired Performing Loans	105,106	125,802
Balance at end of period	128,024	154,025
Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Impaired Loans	13,361	22,950
Acquired Performing Loans	82,773	118,461
Balance at end of period	96,134	141,411
Consumer and Other Loans [Member] | Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Impaired Loans	12,872	21,768
Acquired Performing Loans	79,558	115,354
Balance at end of period	92,430	137,122
Consumer and Other Loans [Member] | Consumer - Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Impaired Loans	489	1,182
Acquired Performing Loans	3,215	3,107
Balance at end of period	$ 3,704	$ 4,289

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Earnings Per Share

12 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

Earnings Per Share

NOTE 3 –EARNINGS PER SHARE

Share-based payment awards that entitle holders to receive non-forfeitable dividends before vesting are considered participating securities and thus included in the calculation of basic earnings per share under the two-class method.

The following table presents the calculation of basic and diluted earnings per share for the periods indicated.

	For the Years Ended December 31
(In thousands, except per share data)	2014			2013			2012
Income available to common shareholders	$	105,450		$	65,103		$	76,395
Earnings to unvested restricted stock		(1,652	)		(1,206	)		(1,443	)
Earnings to common shareholders - basic		103,798			63,897			74,952
Earnings reallocated to unvested restricted stock		(33	)		(3	)		6
Earnings to common shareholders - diluted	$	103,765		$	63,894		$	74,958
Weighted average shares outstanding - basic		31,307			29,052			28,901
Potential common shares		126			53			57
Weighted average shares outstanding - diluted		31,433			29,105			28,958
Weighted average shares outstanding - unvested restricted stock		518			553			553
Earnings per common share - basic	$	3.32		$	2.20		$	2.59
Earnings per common share - diluted		3.30			2.20			2.59
Earnings per unvested restricted stock share - basic		3.19			2.18			2.61
Earnings per unvested restricted stock share - diluted		3.13			2.18			2.60

Additional information on the Company’s basic earnings per common share is shown in the following table.

	For the Years Ended December 31
(Dollars in thousands, except per share data)	2014		2013		2012
Distributed earnings to common shareholders	$	43,623	$	39,685	$	39,349
Undistributed earnings to common shareholders		60,175		24,212		35,603
Total earnings to common shareholders	$	103,798	$	63,897	$	74,952
Distributed earnings to unvested restricted stock	$	694	$	749	$	758
Undistributed earnings to unvested restricted stock		958		457		685
Total earnings allocated to unvested restricted stock	$	1,652	$	1,206	$	1,443
Distributed earnings per common share	$	1.40	$	1.37	$	1.36
Undistributed earnings per common share		1.92		0.83		1.23
Total earnings per common share	$	3.32	$	2.20	$	2.59
Distributed earnings per unvested restricted stock share	$	1.34	$	1.35	$	1.37
Undistributed earnings per unvested restricted stock share		1.85		0.83		1.24
Total earnings per unvested restricted stock share	$	3.19	$	2.18	$	2.61

For the years ended December 31, 2014, 2013, and 2012, the calculations for basic shares outstanding exclude the weighted average shares owned by the Recognition and Retention Plan (“RRP”) of 625,555, 642,008, and 612,097, respectively, and are adjusted for the weighted average shares in treasury stock of 1,879,440, 2,223,306, and 1,964,825, respectively.

The effects from the assumed exercises of 13,101, 483,696, and 752,188 stock options were not included in the computation of diluted earnings per share for years ended December 31, 2014, 2013, and 2012, respectively, because such amounts would have had an antidilutive effect on earnings per common share.

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Quarterly Results of Operations and Selected Cash Flow Data (Unaudited) - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Sep. 30, 2014	Jun. 30, 2014
Quarterly Financial Information Disclosure [Abstract]
Mortgage income	$ 1.5	$ 4.2

XML

Business Segments (Tables)

12 Months Ended

Dec. 31, 2014

Segment Reporting [Abstract]

Schedule of Segment Reporting Information

The Company’s wealth management, capital markets and trust operating segments are aggregated within the IBERIABANK reportable operating segment because they do not meet the thresholds specified by ASC 280 and based on the qualitative factors presented within ASC 280. The Company’s IMC and LTC segments do not meet the quantitative thresholds specified by ASC 280, but are reported because management believes information about those segments is useful to users of the financial statements.

(Dollars in thousands)	Year Ended December 31, 2014
	IBERIABANK			IMC			LTC			Consolidated
Interest income	$	498,820		$	5,992		$	3		$	504,815
Interest expense		42,983			1,721			—			44,704
Net interest income		455,837			4,271			3			460,111
Provision for loan losses		18,966			94			—			19,060
Mortgage income		71			51,726			—			51,797
Title income		—			—			20,492			20,492
Other non-interest income		101,401			(61	)		(1	)		101,339
Core deposit intangible amortization		5,569			—			—			5,569
Allocated expenses		(11,602	)		8,203			3,399			—
Other non-interest expenses		407,461			44,761			16,688			468,910
Income before income taxes		136,915			2,878			407			140,200
Income tax provision		33,419			1,148			183			34,750
Net income	$	103,496		$	1,730		$	224		$	105,450
Total loans and loans held for sale, net of unearned income	$	11,415,973		$	165,143		$	—		$	11,581,116
Total assets		15,538,432			194,156			26,017			15,758,605
Total deposits		12,515,329			5,196			—			12,520,525
Average assets		14,431,459			176,003			25,223			14,632,685
(Dollars in thousands)	Year Ended December 31, 2013
	IBERIABANK			IMC			LTC			Consolidated
Interest income	$	431,418		$	5,747		$	32		$	437,197
Interest expense		45,150			1,803			—			46,953
Net interest income		386,268			3,944			32			390,244
Provision for loan losses		5,123			22			—			5,145
Mortgage income		2			64,195			—			64,197
Title income		—			—			20,526			20,526
Other non-interest income		84,243			(10	)		2			84,235
Core deposit intangible amortization		4,499			—			—			4,499
Allocated expenses		(7,453	)		5,417			2,036			—
Other non-interest expenses		402,170			49,723			16,693			468,586
Income before income taxes		66,174			12,967			1,831			80,972
Income tax provision		10,035			5,093			741			15,869
Net income	$	56,139		$	7,874		$	1,090		$	65,103
Total loans and loans held for sale, net of unearned income	$	9,472,908		$	147,553		$	—		$	9,620,461
Total assets		13,167,162			173,131			25,257			13,365,550
Total deposits		10,734,030			2,970			—			10,737,000
Average assets		12,794,997			183,513			25,478			13,003,988

(Dollars in thousands)	Year Ended December 31, 2012
	IBERIABANK			IMC			LTC		Consolidated
Interest income	$	439,245		$	5,858		$	97	$	445,200
Interest expense		61,349			2,101			—		63,450
Net interest income		377,896			3,757			97		381,750
Provision for loan losses		20,550			121			—		20,671
Mortgage income		6			78,047			—		78,053
Title income		—			—			20,987		20,987
Other non-interest income		76,967			(10	)		—		76,957
Core deposit intangible amortization		4,900			—			—		4,900
Allocated expenses		(3,282	)		2,340			942		—
Other non-interest expenses		361,428			49,084			16,773		427,285
Income before income taxes		71,273			30,249			3,369		104,891
Income tax provision		15,192			11,871			1,433		28,496
Net income	$	56,081		$	18,378		$	1,936	$	76,395
Total loans and loans held for sale, net of unearned income	$	8,485,363		$	280,692		$	—	$	8,766,055
Total assets		12,796,811			308,152			24,715		13,129,678
Total deposits		10,745,528			2,749			—		10,748,277
Average assets		11,879,761			194,832			22,379		12,096,972

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Loans - Schedule of Non-Covered and Covered Loans (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	$ 10,996,500	$ 8,772,226
Covered loans receivable	444,544	719,793
Total loans receivable	11,441,044	9,492,019
Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	444,544	719,793	1,092,756
Covered Loans [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	187,873	387,332	640,843
Non-Covered Legacy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	9,668,714	8,288,321
Non-Covered Acquired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	1,327,786	483,905
Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	220,386	424,357
Total loans receivable	7,814,082	6,863,418
Commercial Loans [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	189,126	387,332
Total loans receivable	4,405,133	3,867,305
Commercial Loans [Member] | Business [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	31,260	37,025
Total loans receivable	3,408,949	2,996,113
Commercial Loans [Member] | Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	220,386	424,357
Commercial Loans [Member] | Covered Loans [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	189,126	387,332
Commercial Loans [Member] | Covered Loans [Member] | Business [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	31,260	37,025
Commercial Loans [Member] | Non-Covered Legacy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	7,002,198	6,040,955
Commercial Loans [Member] | Non-Covered Legacy Loans [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	3,718,058	3,134,904
Commercial Loans [Member] | Non-Covered Legacy Loans [Member] | Business [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	3,284,140	2,906,051
Commercial Loans [Member] | Non-Covered Acquired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	591,498	398,106
Commercial Loans [Member] | Non-Covered Acquired Loans [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	497,949	345,069
Commercial Loans [Member] | Non-Covered Acquired Loans [Member] | Business [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	93,549	53,037
Residential Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	128,024	154,025
Total loans receivable	1,080,297	586,532
Residential Mortgage Loans [Member] | Residential 1-4 Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	128,024	154,025
Total loans receivable	1,048,241	577,082
Residential Mortgage Loans [Member] | Construction / Owner Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	32,056	9,450
Residential Mortgage Loans [Member] | Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	128,024	154,025
Residential Mortgage Loans [Member] | Covered Loans [Member] | Residential 1-4 Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	128,024	154,025
Residential Mortgage Loans [Member] | Non-Covered Legacy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	527,694	414,372
Residential Mortgage Loans [Member] | Non-Covered Legacy Loans [Member] | Residential 1-4 Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	495,638	404,922
Residential Mortgage Loans [Member] | Non-Covered Legacy Loans [Member] | Construction / Owner Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	32,056	9,450
Residential Mortgage Loans [Member] | Non-Covered Acquired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	424,579	18,135
Residential Mortgage Loans [Member] | Non-Covered Acquired Loans [Member] | Residential 1-4 Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	424,579	18,135
Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	96,134	141,411
Total loans receivable	2,546,665	2,042,069
Consumer and Other Loans [Member] | Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	92,430	137,122
Total loans receivable	1,601,105	1,291,792
Consumer and Other Loans [Member] | Indirect Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	397,158	375,236
Consumer and Other Loans [Member] | Consumer - Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	3,704	4,289
Total loans receivable	548,402	375,041
Consumer and Other Loans [Member] | Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	96,134	141,411
Consumer and Other Loans [Member] | Covered Loans [Member] | Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	92,430	137,122
Consumer and Other Loans [Member] | Covered Loans [Member] | Consumer - Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	3,704	4,289
Consumer and Other Loans [Member] | Non-Covered Legacy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	2,138,822	1,832,994
Consumer and Other Loans [Member] | Non-Covered Legacy Loans [Member] | Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	1,290,976	1,101,227
Consumer and Other Loans [Member] | Non-Covered Legacy Loans [Member] | Indirect Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	396,766	373,383
Consumer and Other Loans [Member] | Non-Covered Legacy Loans [Member] | Consumer - Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	451,080	358,384
Consumer and Other Loans [Member] | Non-Covered Acquired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	311,709	67,664
Consumer and Other Loans [Member] | Non-Covered Acquired Loans [Member] | Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	217,699	53,443
Consumer and Other Loans [Member] | Non-Covered Acquired Loans [Member] | Indirect Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	392	1,853
Consumer and Other Loans [Member] | Non-Covered Acquired Loans [Member] | Consumer - Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	$ 93,618	$ 12,368

XML

Premises and Equipment - Schedule of Premises and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Property Plant and Equipment Useful Life and Values [Abstract]
Land	$ 75,916	$ 77,113
Buildings	232,727	217,469
Furniture, fixtures and equipment	128,388	110,663
Total premises and equipment	437,031	405,245
Accumulated depreciation	(129,872)	(117,735)
Total premises and equipment, net	$ 307,159	$ 287,510

XML

Acquisition and Disposition Activity - Schedule of Business Acquisitions, by Acquisition (Parenthetical) (Detail) (Teche [Member])	12 Months Ended
	Dec. 31, 2014
Teche [Member]
Business Acquisition [Line Items]
Estimated amortized period for fair value adjustment	85 months

XML

Share-Based Compensation

12 Months Ended

Dec. 31, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-Based Compensation

NOTE 20 – SHARE-BASED COMPENSATION

The Company has various types of share-based compensation plans. These plans are administered by the Compensation Committee of the Board of Directors, which selects persons eligible to receive awards and determines the number of shares and/or options subject to each award, the terms, conditions and other provisions of the awards. During the years ended December 31, 2014 and 2013, the Company did not have any equity awards that were settled in cash.

Stock option awards

The Company issues stock options under various plans to directors, officers and other key employees. The option exercise price cannot be less than the fair value of the underlying common stock as of the date of the option grant and the maximum option term cannot exceed ten years. The stock options granted were issued with vesting periods ranging from one-and-a half to seven years. At December 31, 2014, future option or restricted stock awards of 1,038,945 shares could be made under approved incentive compensation plans.

The following table represents the compensation expense that is included in non-interest expense and related income tax benefits in the accompanying consolidated statements of comprehensive income related to stock options for the years ended December 31:

(Dollars in thousands, except per share data)	2014		2013		2012
Compensation expense related to stock options	$	2,053	$	2,110	$	1,873
Income tax benefit related to stock options		719		739		656
Impact on basic earnings per share		0.04		0.05		0.04
Impact on diluted earnings per share		0.04		0.05		0.04
Proceeds from the exercise of stock options	$	11,693	$	8,101	$	2,813
Excess tax benefits related to the exercise of stock options		2,105		886		1,221

The Company uses the Black-Scholes option pricing model to estimate the fair value of stock option awards. The following weighted-average assumptions were used for option awards issued during the years ended December 31:

	2014			2013			2012
Expected dividends		2.1	%		2.6	%		2.7	%
Expected volatility		35.8	%		34.8	%		40.1	%
Risk-free interest rate		2.3	%		1.7	%		0.8	%
Expected term (in years)		7.5			8.6			5.00
Weighted-average grant-date fair value	$	21.26		$	15.37		$	14.50

The assumptions above are based on multiple factors, including historical stock option exercise patterns and post-vesting employment termination behaviors, expected future exercise patterns and the expected volatility of the Company’s stock price.

At December 31, 2014, there was $3.2 million of unrecognized compensation cost related to stock options that is expected to be recognized over a weighted-average period of 5.1 years.

The following table represents the activity related to stock options during the periods indicated.

	Number of shares			Weighted Average Exercise Price		Aggregate Intrinsic Value (Dollars in thousands)		Weighted Average Remaining Contract Life (in years)
Outstanding options, December 31, 2011		1,097,620		$	50.14
Granted		230,665			51.69
Issued in connection with acquisition		32,863			41.30
Exercised		(92,092	)		30.43	$	1,765
Forfeited or expired		(32,981	)		56.79
Outstanding options, December 31, 2012		1,236,075		$	51.48
Granted		75,722			52.36
Exercised		(200,748	)		40.35		2,740
Forfeited or expired		(38,220	)		55.87
Outstanding options, December 31, 2013		1,072,829		$	53.47
Granted		77,434			65.31
Exercised		(267,421	)		48.57		4,612
Forfeited or expired		(15,160	)		60.38
Outstanding options, December 31, 2014		867,682		$	55.92		8,220		5.1
Exercisable options, December 31, 2012		792,444			50.05
Exercisable options, December 31, 2013		707,934			53.54
Exercisable options, December 31, 2014		562,752			55.92	$	5,449		3.7

The following table presents weighted average remaining life as of December 31, 2014 for options outstanding within the stated exercise prices:

	Options Outstanding						Options Exercisable
Exercise Price Range Per Share	Number of Options		Weighted Average Exercise Price		Weighted Average Remaining Life		Number of Options		Weighted Average Exercise Price
$34.33 to $51.69		182,416	$	49.24		4.3 Years		118,312	$	48.53
$51.70 to $52.35		111,197		52.33		7.1 Years		43,156		52.33
$52.36 to $54.68		146,995		53.43		6.5 Years		90,146		54.10
$54.69 to $57.60		142,360		56.52		3.7 Years		120,873		56.68
$57.61 to $59.83		105,666		58.38		1.5 Years		105,666		58.38
$59.84 to $111.71		179,048		65.06		6.7 Years		84,599		65.89
Total options		867,682	$	55.92		5.1 Years		562,752	$	55.92

Restricted stock awards

The Company issues restricted stock under various plans for certain officers and directors. The 2005, 2008, and 2010 Incentive Plans allow grants of restricted stock. The plans allow for the issuance of restricted stock awards that may not be sold or otherwise transferred until certain restrictions have lapsed. The holders of the restricted stock receive dividends and have the right to vote the shares. The fair value of the restricted stock shares awarded under these plans is recorded as unearned share-based compensation, a contra-equity account. The unearned compensation related to these awards is amortized to compensation expense over the vesting period (generally three to seven years). The total share-based compensation expense for these awards is determined based on the market price of the Company’s common stock at the date of grant applied to the total number of shares granted and is amortized over the vesting period. As of December 31, 2014 and 2013, unearned share-based compensation associated with these awards totaled $19.8 million and $21.1 million, respectively.

The following table represents the compensation expense that was included in non-interest expense in the accompanying consolidated statements of comprehensive income related to restricted stock grants for the years ended December 31:

(Dollars in thousands)	2014		2013		2012
Compensation expense related to restricted stock	$	9,932	$	8,593	$	8,035

The following table represents unvested restricted stock award activity for the years ended December 31:

	2014			2013			2012
Balance at beginning of period		523,756			538,202			512,112
Granted		149,072			167,095			176,669
Forfeited		(167,550	)		(28,713	)		(13,164	)
Earned and issued		(18,171	)		(152,828	)		(137,415	)
Balance at end of period		487,107			523,756			538,202

Phantom stock awards

As part of the IBKC Phantom Award Plan, the 2009 Phantom Stock Plan, and the 2014 Phantom Stock Plan, the Company issues phantom stock awards to certain key officers and employees. The award is subject to a vesting period of five to seven years and is paid out in cash upon vesting. The amount paid per vesting period is calculated as the number of vested “share equivalents” multiplied by the closing market price of a share of the Company’s common stock on the vesting date. Share equivalents are calculated on the date of grant as the total award’s dollar value divided by the closing market price of a share of the Company’s common stock on the grant date. Award recipients are also entitled to a “dividend equivalent” on each unvested share equivalent held by the award recipient. A dividend equivalent is a dollar amount equal to the cash dividends that the participant would have been entitled to receive if the participant’s share equivalents were issued in shares of common stock. Dividend equivalents will be deemed to be reinvested as share equivalents that will vest and be paid out on the same date as the underlying share equivalents on which the dividend equivalents were paid. The number of share equivalents acquired with a dividend equivalent is determined by dividing the aggregate of dividend equivalents paid on the unvested share equivalents by the closing price of a share of the Company’s common stock on the dividend payment date.

The following table indicates compensation expense recorded for phantom stock based on the number of share equivalents vested at December 31 of the periods indicated and the current market price of the Company’s stock at that time.

(Dollars in thousands)	2014		2013		2012
Compensation expense related to phantom stock	$	5,496	$	4,855	$	2,185

The following table represents phantom stock award activity during the periods indicated.

	Number of share equivalents			Dividend equivalents			Total share equivalents			Value of share equivalents (1)
Balance, December 31, 2011		232,921			8,942			241,863		$	11,924,000
Granted		119,038			9,152			128,190			6,297,000
Forfeited share equivalents		(10,949	)		(367	)		(11,316	)		556,000
Vested share equivalents		(22,281	)		(1,692	)		(23,973	)		1,180,000
Balance, December 31, 2012		318,729			16,035			334,764		$	16,444,000
Granted		169,662			11,189			180,851			11,366,000
Forfeited share equivalents		(18,975	)		(785	)		(19,760	)		1,242,000
Vested share equivalents		(52,178	)		(4,088	)		(56,266	)		2,922,000
Balance, December 31, 2013		417,238			22,351			439,589		$	27,628,000
Granted		118,859			9,566			128,425			8,328,000
Forfeited share equivalents		(19,736	)		(1,754	)		(21,490	)		1,394,000
Vested share equivalents		(75,331	)		(7,515	)		(82,846	)		5,512,000
Balance, December 31, 2014		441,030			22,648			463,678		$	30,070,000

⁽¹⁾  Except for share equivalents at the beginning of each period, which are based on the value at that time, and vested share payments, which are based on the cash paid at the time of vesting, the value of share equivalents is calculated based on the market price of the Company’s stock at the end of the respective periods. The market price of the Company’s stock was $64.85, $62.85 and $49.12 on December 31, 2014, 2013 and 2012, respectively.

Restricted Share Units

In 2014, the Company issued shares of restricted share units to some of the executive officers. Restricted share units vest after the end of a three-year performance period, based on satisfaction of the performance conditions set forth in the restricted share unit agreement. Recipients do not possess voting or investment power over the common stock underlying such units until vesting. The value of these restricted share units is the same as the value of the corresponding number of shares of common stock.

Performance Units

In 2014, the Company issued shares of performance units to some of the executive officers. Performance units vest after the end of a three-year performance period, based on satisfaction of the performance conditions set forth in the performance unit agreement. Performance units are tied to the value of shares of the Company’s common stock, are payable in cash, and vest in increments of one-third per year after attainment of one or more performance measures. The value of performance unit is the same as the value of the corresponding number of shares of common stock.

401(k) defined contribution plan

The Company has a 401(k) Profit Sharing Plan covering substantially all of its employees. Annual employer contributions to the plan are set by the Board of Directors. The Company made contributions of $1.5 million, $1.3 million, and $1.3 million for the years ended December 31, 2014, 2013, and 2012, respectively. The Plan provides, among other things, that participants in the Plan be able to direct the investment of their account balances within the Profit Sharing Plan into alternative investment funds. Participant deferrals under the salary reduction election may be matched by the employer based on a percentage to be determined annually by the employer.

XML

Derivative Instruments and Other Hedging Activities - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Cash as collateral for derivative transactions	$ 11.5	$ 5.0
Fair value of derivatives	$ 0.4

XML

Income Taxes - Schedule of Provision for Income Tax Expense (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Current expense									$ 69,612	$ 62,468	$ 44,125
Deferred benefit									(24,955)	(35,943)	(7,527)
Tax credits									(12,012)	(11,690)	(8,756)
Tax benefits attributable to items charged to equity and goodwill									2,105	1,034	654
Total income tax expense	$ 9,939	$ 11,897	$ 4,750	$ 8,163	$ 9,175	$ 7,357	$ 4,213	$ (4,876)	$ 34,750	$ 15,869	$ 28,496

XML

Long-Term Debt - Schedule of Long-Term Debt (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Notes payable - Investment fund contributions	$ 291,392	$ 168,837
Junior subordinated debt	111,862	111,862
Total long-term debt	403,254	280,699
0.724% to 7.04% [Member]
Debt Instrument [Line Items]
Federal Home Loan Bank notes	210,549	92,267
0.50% to 5.00% Fixed [Member]
Debt Instrument [Line Items]
Notes payable - Investment fund contributions	80,843	76,570
Statutory Trust I, 3 Month LIBOR Plus 3.25% [Member]
Debt Instrument [Line Items]
Junior subordinated debt	10,310	10,310
Statutory Trust II, 3 Month LIBOR Plus 3.15% [Member]
Debt Instrument [Line Items]
Junior subordinated debt	10,310	10,310
Statutory Trust III, 3 Month LIBOR Plus 2.00% [Member]
Debt Instrument [Line Items]
Junior subordinated debt	10,310	10,310
Statutory Trust IV, 3 Month LIBOR Plus 1.60% [Member]
Debt Instrument [Line Items]
Junior subordinated debt	15,464	15,464
American Horizons Statutory Trust I, 3 Month LIBOR Plus 3.15% [Member]
Debt Instrument [Line Items]
Junior subordinated debt	6,186	6,186
Statutory Trust V, 3 Month LIBOR Plus 1.435% [Member]
Debt Instrument [Line Items]
Junior subordinated debt	10,310	10,310
Statutory Trust VI, 3 Month LIBOR Plus 2.75% [Member]
Debt Instrument [Line Items]
Junior subordinated debt	12,372	12,372
Statutory Trust VII, 3 Month LIBOR Plus 2.54% [Member]
Debt Instrument [Line Items]
Junior subordinated debt	13,403	13,403
Statutory Trust VIII, 3 Month LIBOR Plus 3.50% [Member]
Debt Instrument [Line Items]
Junior subordinated debt	7,217	7,217
OMNI Trust I, 3 Month LIBOR Plus 3.30% [Member]
Debt Instrument [Line Items]
Junior subordinated debt	8,248	8,248
OMNI Trust II, 3 Month LIBOR Plus 2.79% [Member]
Debt Instrument [Line Items]
Junior subordinated debt	$ 7,732	$ 7,732

XML

Investment Securities - Schedule of Exposure to Investment Security Issuers Exceed Ten Percentage of Shareholders' Equity (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule of Investments [Line Items]
Amortized Cost	$ 2,147,276	$ 1,963,046
Market Value	2,158,853	1,936,797
Investment Concentration Risk [Member]
Schedule of Investments [Line Items]
Amortized Cost	1,928,433
Market Value	1,933,168
Investment Concentration Risk [Member] | Federal National Mortgage Association (Fannie Mae) [Member]
Schedule of Investments [Line Items]
Amortized Cost	1,220,841
Market Value	1,226,654
Investment Concentration Risk [Member] | Federal Home Loan Mortgage Corporation (Freddie Mac) [Member]
Schedule of Investments [Line Items]
Amortized Cost	707,592
Market Value	$ 706,514

XML

Business Segments - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014 Segment
Segment Reporting [Abstract]
No of business segments	3

XML

Acquisition and Disposition Activity (Tables)

12 Months Ended

Dec. 31, 2014

Schedule of Assets Acquired under Business Acquisitions

As part of the acquisitions, LTC also acquired or created the following other assets:

(Dollars in thousands)	The Title Company LLC		Louisiana Abstract and Title LLC
Goodwill	$	221	$	155
Non-compete agreement		63		100
Title plant		14		9
Other intangible assets		75		130
Other assets		3		6
Total Assets	$	376	$	400

Supplemental Pro Forma Information

The following unaudited pro forma information for the year ended December 31, 2013 reflects the Company’s estimated consolidated results of operations as if the acquisitions of Trust One-Memphis, Teche, and First Private occurred at January 1, 2013, unadjusted for potential cost savings and preliminary purchase price adjustments.

(Dollars in thousands, except per share data)	2013		2012
Interest and non-interest income	$	669,607	$	687,279
Net income		74,624		86,473
Earnings per share - basic		2.26		2.63
Earnings per share - diluted		2.26		2.63

Schedule of Branch Closure Costs

The following table shows the costs the Company incurred that are included in its consolidated statements of comprehensive income for the years indicated. Costs associated with branch dispositions for the year ended December 31, 2014 were immaterial.

	For the Years Ended December 31,
(Dollars in thousands)	2013		2012
Employee termination	$	299	$	477
Accelerated depreciation		1,033		576
Contract termination		659		20
Impairment		4,941		2,743
	$	6,932	$	3,816

Teche [Member]

Schedule of Business Acquisitions by Acquisition, Equity Interest Issued or Issuable

The following summarizes consideration paid and a preliminary allocation of purchase price to net assets acquired.

(Dollars in thousands)	Number of Shares		Amount
Equity consideration
Common stock issued		2,498,007	$	156,026
Total equity consideration				156,026
Non-Equity consideration
Cash				714
Total consideration paid				156,740
Fair value of net assets assumed including identifiable intangible assets				76,311
Goodwill			$	80,429

Schedule of Business Acquisitions, by Acquisition

Teche	As Acquired		Preliminary Fair Value Adjustments			As recorded by IBERIABANK
(Dollars in thousands)
Assets
Cash and cash equivalents	$	71,611	$	—		$	71,611
Investment securities		24,077		1,092	(1)		25,169
Loans		716,327		(15,869	) (2)		700,458
Other real estate owned		329		(153	) (3)		176
Core deposit intangible		—		7,440	(4)		7,440
Deferred tax asset		1,057		4,835	(5)		5,892
Other assets		56,730		(5,653	) (6)		51,077
Total Assets	$	870,131	$	(8,308	)	$	861,823
Liabilities
Interest-bearing deposits	$	520,446	$	902	(7)	$	521,348
Non-interest-bearing deposits		118,256		—			118,256
Borrowings		134,228		6,304	(8)		140,532
Other liabilities		5,376		—			5,376
Total Liabilities	$	778,306	$	7,206		$	785,512

Explanation of certain fair value adjustments:

⁽¹⁾  The amount represents the adjustment of the book value of Teche’s investments to their estimated fair value based on fair values on the date of acquisition.

⁽²⁾  The amount represents the adjustment of the book value of Teche loans to their estimated fair value based on current interest rates and expected cash flows, which includes estimates of expected credit losses inherent in the portfolio.

⁽³⁾  The amount represents the adjustment to the book value of Teche’s OREO to their estimated fair value on the date of acquisition.

⁽⁴⁾  The amount represents the fair value of the core deposit intangible asset created in the acquisition.

⁽⁵⁾  The amount represents the deferred tax asset recognized on the fair value adjustment of Teche acquired assets and assumed liabilities.

⁽⁶⁾  The amount represents the adjustment of the book value of Teche’s property, equipment, and other assets to their estimated fair value at the acquisition date based on their appraised value, as well as the fair value of mortgage servicing rights created in the acquisition.

⁽⁷⁾  The adjustment is necessary because the weighted average interest rate of Teche’s deposits exceeded the cost of similar funding at the time of acquisition. The fair value adjustment will be amortized to reduce future interest expense over the life of the portfolio, which is estimated at 85 months.

⁽⁸⁾  The adjustment represents the adjustment of the book value of Teche’s borrowings to their estimated fair value based on current interest rates and the credit characteristics inherent in the liability.

First Private [Member]

Schedule of Business Acquisitions by Acquisition, Equity Interest Issued or Issuable

The following summarizes consideration paid and a preliminary allocation of purchase price to net assets acquired.

(Dollars in thousands)	Number of Shares		Amount
Equity consideration
Common stock issued		847,509	$	58,639
Total equity consideration				58,639
Non-Equity consideration
Cash				1
Total consideration paid				58,640
Fair value of net assets assumed including identifiable intangible assets				32,387
Goodwill			$	26,253

Schedule of Business Acquisitions, by Acquisition

First Private	As Acquired		Preliminary Fair Value Adjustments			As recorded by IBERIABANK
(Dollars in thousands)
Assets
Cash and cash equivalents	$	26,621	$	—		$	26,621
Investment securities		18,920		297	(1)		19,217
Loans		300,177		(910	) (2)		299,267
Other real estate owned		—		—			—
Core deposit intangible		—		506	(3)		506
Deferred tax asset		530		122	(4)		652
Other assets		5,148		—			5,148
Total Assets	$	351,396	$	15		$	351,411
Liabilities
Interest-bearing deposits	$	261,713	$	220	(5)	$	261,933
Non-interest-bearing deposits		50,334		—			50,334
Borrowings		6,451		—			6,451
Other liabilities		306		—			306
Total Liabilities	$	318,804	$	220		$	319,024

Explanation of certain fair value adjustments:

⁽¹⁾  The amount represents the adjustment of the book value of First Private’s investments to their estimated fair value based on fair values on the date of acquisition.

⁽²⁾  The amount represents the adjustment of the book value of First Private loans to their estimated fair value based on current interest rates and expected cash flows, which includes estimates of expected credit losses inherent in the portfolio.

⁽³⁾  The amount represents the fair value of the core deposit intangible asset created in the acquisition.

⁽⁴⁾  The amount represents the deferred tax asset recognized on the fair value adjustment of First Private acquired assets and assumed liabilities.

⁽⁵⁾  The adjustment is necessary because the weighted average interest rate of First Private’s deposits exceeded the cost of similar funding at the time of acquisition. The fair value adjustment will be amortized to reduce future interest expense over the life of the portfolio, which is estimated at 39 months.

Trust One- Memphis [Member]

Schedule of Business Acquisitions, by Acquisition

The acquired assets and liabilities, as well as the preliminary adjustments to record the assets and liabilities at their estimated fair values, are presented in the following tables.

Trust One- Memphis	As Acquired		Preliminary Fair Value Adjustments			As recorded by IBERIABANK
(Dollars in thousands)
Assets
Cash and cash equivalents	$	92,060	$	—		$	92,060
Loans		88,179		(1,726	) (1)		86,453
Other real estate owned		1,325		—			1,325
Core deposit intangible		—		2,597	(2)		2,597
Other assets		368		—			368
Total Assets	$	181,932	$	871		$	182,803
Liabilities
Interest-bearing deposits	$	164,942	$	—		$	164,942
Non-interest-bearing deposits		26,373		—			26,373
Deferred tax liability		—		—			—
Other liabilities		84		—			84
Total Liabilities	$	191,399	$	—		$	191,399

Explanation of certain fair value adjustments:

⁽¹⁾  The amount represents the adjustment of the book value of Trust One-Memphis loans to their estimated fair value based on current interest rates and expected cash flows, which includes estimates of expected credit losses inherent in the portfolio.

⁽²⁾  The amount represents the fair value of the core deposit intangible asset created in the acquisition.

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Derivative Instruments and Other Hedging Activities

12 Months Ended

Dec. 31, 2014

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments and Other Hedging Activities

NOTE 13 –DERIVATIVE INSTRUMENTS AND OTHER HEDGING ACTIVITIES

Information pertaining to outstanding derivative instruments is as follows:

	Balance Sheet	Asset Derivatives Fair Value				Balance Sheet	Liability Derivatives Fair Value
(Dollars in thousands)	Location	December 31, 2014		December 31, 2013		Location	December 31, 2014		December 31, 2013
Derivatives not designated as hedging instruments under ASC Topic 815:
Interest rate contracts	Other assets	$	15,434	$	10,621	Other liabilities	$	15,434	$	10,620
Forward sales contracts	Other assets		25		1,468	Other liabilities		2,556		287
Written and purchased options	Other assets		17,444		17,987	Other liabilities		13,364		15,828
Total		$	32,903	$	30,076		$	31,354	$	26,735
		Asset Derivatives Notional Amount					Liability Derivatives Notional Amount
(Dollars in thousands)		December 31, 2014		December 31, 2013			December 31, 2014		December 31, 2013
Derivatives not designated as hedging instruments under ASC Topic 815:
Interest rate contracts		$	444,703	$	380,303		$	444,703	$	380,303
Forward sales contracts			15,897		192,876			391,992		45,091
Written and purchased options			362,580		295,425			225,741		199,061
Total		$	823,180	$	868,604		$	1,062,436	$	624,455

The Company is party to collateral agreements with certain derivative counterparties. Such agreements require that the Company maintain collateral based on the fair values of individual derivative transactions. In the event of default by the Company, the counterparty would be entitled to the collateral.

At December 31, 2014 and 2013, the Company was required to post $11.5 million and $5.0 million, respectively, in cash as collateral for its derivative transactions, which are included in interest-bearing deposits in banks on the Company’s consolidated balance sheets. The Company does not anticipate additional assets will be required to be posted as collateral, nor does it believe additional assets would be required to settle its derivative instruments immediately if contingent features were triggered at December 31, 2014. The Company’s master netting agreements represent written, legally enforceable bilateral agreements that (1) create a single legal obligation for all individual transactions covered by the master agreement and (2) in the event of default, provide the non-defaulting counterparty the right to accelerate, terminate, and close-out on a net basis all transactions under the agreement and to promptly liquidate or set-off collateral posted by the defaulting counterparty. As permitted by U.S. GAAP, the Company does not offset fair value amounts recognized for the right to reclaim cash collateral or the obligation to return cash collateral against recognized fair value amounts of derivatives executed with the same counterparty under a master netting agreement. The following table reconciles the gross amounts presented in the consolidated balance sheets to the net amounts that would result in the event of offset.

	December 31, 2014
(Dollars in thousands) Derivatives subject to master netting arrangements	Gross Amounts		Gross Amounts Not Offset
	Presented in the		in the Balance Sheet
	Balance Sheet		Derivatives		Collateral (1)			Net
Derivative assets
Interest rate contracts designated as hedging instruments	$	—	$	—	$	—		$	—
Interest rate contracts not designated as hedging instruments		15,411		—		—			15,411
Written and purchased options		13,387		—		—			13,387
Total derivative assets subject to master netting arrangements	$	28,798	$	—	$	—		$	28,798
Derivative liabilities
Interest rate contracts designated as hedging instruments	$	—	$	—	$	—		$	—
Interest rate contracts not designated as hedging instruments		15,411		—		(3,735	)		11,676
Total derivative liabilities subject to master netting arrangements	$	15,411	$	—	$	(3,735	)	$	11,676

⁽¹⁾  Consists of cash collateral recorded at cost, which approximates fair value, and investment securities.

	December 31, 2013
(Dollars in thousands) Derivatives subject to master netting arrangements	Gross Amounts		Gross Amounts Not Offset
	Presented in the		in the Balance Sheet
	Balance Sheet		Derivatives		Collateral (1)			Net
Derivative assets
Interest rate contracts designated as hedging instruments	$	—	$	—	$	—		$	—
Interest rate contracts not designated as hedging instruments		10,621		—		—			10,621
Written and purchased options		15,801		—		—			15,801
Total derivative assets subject to master netting arrangements	$	26,422	$	—	$	—		$	26,422
Derivative liabilities
Interest rate contracts designated as hedging instruments	$	—	$	—	$	—		$	—
Interest rate contracts not designated as hedging instruments		10,620		—		(5,419	)		5,201
Total derivative liabilities subject to master netting arrangements	$	10,620	$	—	$	(5,419	)	$	5,201

⁽¹⁾  Consists of cash collateral recorded at cost, which approximates fair value, and investment securities.

During the years ended December 31, 2014 and 2013, the Company has not reclassified into earnings any gain or loss as a result of the discontinuance of cash flow hedges because it was probable the original forecasted transaction would not occur by the end of the originally specified term.

At December 31, 2014, the fair value of derivatives that will mature within the next twelve months is $0.4 million. The Company does not expect to reclassify any amount from accumulated other comprehensive income into interest income over the next twelve months for derivatives that will be settled.

At December 31, 2014 and 2013, and for years then ended, information pertaining to the effect of the hedging instruments on the consolidated financial statements is as follows:

(Dollars in thousands)	Amount of Gain (Loss) Recognized in OCI net of taxes (Effective Portion)				Location of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective  Portion)					Location of Gain (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing	Amount of Gain (Loss) Recognized in Income on Derivative (Ineffective Portion  and Amount Excluded from Effectiveness Testing)
	As of December 31					For the Years Ended December 31
	2014		2013			2014		2013				2014			2013
Derivatives in ASC Topic 815 Cash Flow Hedging Relationships
Interest rate contracts	$	—	$	—	Other income (expense)	$	—	$	(392	)	Other income (expense)	$	(1	)	$	1
Total	$	—	$	—		$	—	$	(392	)		$	(1	)	$	1

(Dollars in thousands)
	Location of Gain (Loss) Recognized in Income on Derivatives	Amount of Gain (Loss) Recognized in Income on Derivatives
		2014			2013
Derivatives Not Designated as Hedging Instruments under ASC Topic 815
Interest rate contracts	Other income (expense)	$	2,513		$	2,991
Forward sales contracts	Mortgage Income		(3,225	)		(1,716	)
Written and purchased options	Mortgage Income		(5,739	)		(3,032	)
Total		$	(6,451	)	$	(1,757	)

At December 31, additional information pertaining to outstanding interest rate swap agreements not designated as hedging instruments is as follows:

(Dollars in thousands)	2014			2013
Weighted average pay rate		2.9	%		3.0	%
Weighted average receive rate		0.4	%		0.2	%
Weighted average maturity in years		7.7	yrs		7.6	yrs
Unrealized gain (loss) relating to interest rate swaps	$	—		$	—

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Transfers and Servicing of Financial Assets (Including Mortgage Banking Activity) - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Mortgage Banking [Abstract]
Unpaid principal balances of loans serviced	$ 533.8	$ 345.0