10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

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

For the quarterly period ended September 30, 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)

(337) 521-4003

(Registrant’s telephone number, including area code)

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 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 Exchange Act).    Yes  ¨    No  x

At October 31, 2014, the Registrant had 33,446,577 shares of common stock, $1.00 par value, which were issued and outstanding.

IBERIABANK CORPORATION AND SUBSIDIARIES

TABLE OF CONTENTS

	Page
Part I. Financial Information
Item 1. Financial Statements (unaudited)
Consolidated Balance Sheets as of September 30, 2014 and December 31, 2013		3
Consolidated Statements of Comprehensive Income (Loss) for the three and nine months ended September 30, 2014 and 2013		4
Consolidated Statements of Shareholders’ Equity for the nine months ended September 30, 2014 and 2013		5
Consolidated Statements of Cash Flows for the nine months ended September 30, 2014 and 2013		6
Notes to Unaudited Consolidated Financial Statements		7
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations		54
Item 3. Quantitative and Qualitative Disclosures About Market Risk		97
Item 4. Controls and Procedures		97
Part II. Other Information
Item 1. Legal Proceedings		98
Item 1A. Risk Factors		98
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds		98
Item 3. Defaults Upon Senior Securities		98
Item 4. Mine Safety Disclosures		98
Item 5. Other Information		98
Item 6. Exhibits		99
Signatures		100

2

IBERIABANK CORPORATION AND SUBSIDIARIES

Consolidated Balance Sheets

	(unaudited)
	September 30,			December 31,
(Dollars in thousands, except share data)	2014			2013
Assets
Cash and due from banks	$	257,147		$	238,672
Interest-bearing deposits in banks		410,860			152,724
Total cash and cash equivalents		668,007			391,396
Securities available for sale, at fair value		2,103,828			1,936,797
Securities held to maturity (fair values of $122,458 and $152,566, respectively)		120,520			154,109
Mortgage loans held for sale ($148,530 and $97,273 recorded at fair value, respectively)		148,530			128,442
Loans covered by loss share agreements		524,189			719,793
Non-covered loans, net of unearned income		10,555,010			8,772,226
Total loans, net of unearned income		11,079,199			9,492,019
Allowance for loan losses		(134,540	)		(143,074	)
Loans, net		10,944,659			9,348,945
FDIC loss share receivables		94,712			162,312
Premises and equipment, net		307,868			287,510
Goodwill		526,242			401,872
Other assets		602,243			554,167
Total Assets	$	15,516,609		$	13,365,550
Liabilities
Deposits:
Non-interest-bearing	$	3,157,453		$	2,575,939
Interest-bearing		9,220,322			8,161,061
Total deposits		12,377,775			10,737,000
Short-term borrowings		812,783			680,344
Long-term debt		355,569			280,699
Other liabilities		152,934			136,528
Total Liabilities		13,699,061			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		1,394,618			1,178,284
Retained earnings		473,885			436,141
Accumulated other comprehensive income (loss)		(256	)		(16,491	)
Treasury stock at cost—1,822,042 and 2,130,841 shares, respectively		(85,962	)		(98,872	)
Total Shareholders’ Equity		1,817,548			1,530,979
Total Liabilities and Shareholders’ Equity	$	15,516,609		$	13,365,550

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

3

IBERIABANK CORPORATION AND SUBSIDIARIES

Consolidated Statements of Comprehensive Income (Loss) (unaudited)

	For The Three Months Ended						For the Nine Months Ended
	September 30						September 30
(Dollars in thousands, except per share data)	2014			2013			2014			2013
Interest and Dividend Income
Loans, including fees	$	144,846		$	120,035		$	389,124		$	358,344
Mortgage loans held for sale, including fees		1,594			1,289			3,953			3,965
Investment securities:
Taxable interest		9,551			7,837			28,411			22,241
Tax-exempt interest		1,443			1,649			4,500			5,082
Amortization of FDIC loss share receivable		(25,120	)		(22,875	)		(61,393	)		(68,707	)
Other		853			577			2,024			2,180
Total interest and dividend income		133,167			108,512			366,619			323,105
Interest Expense
Deposits:
NOW and MMDA		5,046			4,441			13,353			14,462
Savings		88			71			235			238
Time deposits		4,067			4,012			10,093			13,038
Short-term borrowings		406			104			1,022			365
Long-term debt		2,519			2,432			7,489			8,196
Total interest expense		12,126			11,060			32,192			36,299
Net interest income		121,041			97,452			334,427			286,806
Provision for loan losses		5,714			2,014			12,565			445
Net interest income after provision for loan losses		115,327			95,438			321,862			286,361
Non-interest Income
Service charges on deposit accounts		10,205			7,512			25,421			21,415
Mortgage income		12,814			15,202			40,903			51,841
Title revenue		5,577			5,482			15,007			16,199
ATM/debit card fee income		3,287			2,476			8,691			7,017
Income from bank owned life insurance		1,047			908			4,423			2,747
Gain (loss) on sale of available for sale investments		582			(3	)		609			2,259
Derivative losses reclassified from other comprehensive income		—			—			—			(392	)
Broker commissions		5,297			3,950			14,823			11,347
Other income		6,854			7,736			19,430			17,809
Total non-interest income		45,663			43,263			129,307			130,242
Non-interest Expense
Salaries and employee benefits		64,934			59,234			193,641			185,578
Net occupancy and equipment		14,883			14,572			44,977			44,050
Impairment of FDIC loss share receivables and other long-lived assets		4,741			1,319			5,378			37,750
Communication and delivery		2,525			2,899			8,756			9,286
Marketing and business development		2,624			2,350			8,886			8,486
Data processing		5,693			4,837			21,196			13,093
Amortization of acquisition intangibles		1,493			1,179			3,954			3,543
Professional services		4,267			4,156			13,575			13,675
Costs of OREO property, net		(587	)		(359	)		1,070			980
Credit and other loan related expense		4,569			5,248			11,208			13,093
Insurance		3,846			3,125			10,518			8,408
Travel and entertainment		2,290			1,912			6,745			6,199
Other expenses		8,782			7,680			24,959			26,269
Total non-interest expense		120,060			108,152			354,863			370,410
Income before income tax expense		40,930			30,549			96,306			46,193
Income tax expense		11,186			7,357			25,619			6,694
Net Income		29,744			23,192			70,687			39,499
Income Available to Common Shareholders—Basic	$	29,744		$	23,192		$	70,687		$	39,499
Earnings Allocated to Unvested Restricted Stock		(448	)		(425	)		(1,159	)		(744	)
Earnings Available to Common Shareholders—Diluted		29,296			22,767			69,528			38,755
Earnings per common share—Basic	$	0.89		$	0.78		$	2.26		$	1.34
Earnings per common share—Diluted		0.89			0.78			2.25			1.33
Cash dividends declared per common share		0.34			0.34			1.02			1.02
Other comprehensive income
Unrealized gains on securities:
Unrealized holding gains (losses) arising during the period	$	(7,032	)	$	5,528		$	25,586		$	(38,769	)
Less: reclassification adjustment for (gains) losses included in net income		(582	)		3			(609	)		(2,259	)
Unrealized gain (loss) on securities, before tax		(7,614	)		5,531			24,977			(41,028	)
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		—			—			—			952
Less: reclassification adjustment for losses (gains) included in net income		—			—			—			392
Fair value of derivative instruments designated as cash flow hedges, before tax		—			—			—			1,344
Other comprehensive income (loss), before tax		(7,614	)		5,531			24,977			(39,684	)
Income tax expense (benefit) related to items of other comprehensive (loss) income		(2,665	)		1,936			8,742			(13,890	)
Other comprehensive income (loss), net of tax		(4,949	)		3,595			16,235			(25,794	)
Comprehensive income (loss)	$	24,795		$	26,787		$	86,922		$	13,705

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

4

IBERIABANK CORPORATION AND SUBSIDIARIES

Consolidated Statements of Shareholders’ Equity

(unaudited)

											Accumulated
					Additional						Other
(Dollars in thousands, except share and per share data)	Common Stock				Paid-In			Retained			Comprehensive			Treasury Stock
	Shares		Amount		Capital			Earnings			Income (Loss)			Shares			Amount			Total
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		—		—		—			39,499			—			—			—			39,499
Other comprehensive loss		—		—		—			—			(25,794	)		—			—			(25,794	)
Cash dividends declared, $1.02 per share		—		—		—			(30,307	)		—			—			—			(30,307	)
Reissuance of treasury stock under incentive plans, net of shares surrendered in payment, including tax benefit		—		—		(966	)		—			—			(94,949	)		4,969			4,003
Treasury stock issued for recognition and retention plans		—		—		(8,016	)		—			—			(149,765	)		8,016			—
Share-based compensation cost		—		—		7,999			—			—			—			—			7,999
Balance, September 30, 2013		31,917,385	$	31,917	$	1,175,197		$	420,664		$	(1,317	)		2,182,926		$	(101,193	)	$	1,525,268
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		—		—		—			70,687			—			—			—			70,687
Other comprehensive income		—		—		—			—			16,235			—			—			16,235
Cash dividends declared, $1.02 per share		—		—		—			(32,943	)		—			—			—			(32,943	)
Reissuance of treasury stock under incentive plans, net of shares surrendered in payment, including tax benefit		—		—		2,168			—			—			(180,423	)		6,830			8,998
Common stock issued for acquisitions		3,345,516		3,346		211,319			—			—			—			—			214,665
Treasury stock issued for recognition and retention plans		—		—		(6,080	)		—			—			(128,376	)		6,080			—
Share-based compensation cost		—		—		8,927			—			—			—			—			8,927
Balance, September 30, 2014		35,262,901	$	35,263	$	1,394,618		$	473,885		$	(256	)		1,822,042		$	(85,962	)	$	1,817,548

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

5

IBERIABANK CORPORATION AND SUBSIDIARIES

Consolidated Statements of Cash Flows (unaudited)

(Dollars in thousands)
	For the Nine Months Ended September 30,
	2014			2013
Cash Flows from Operating Activities
Net income	$	70,687		$	39,499
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		12,190			19,851
Amortization of purchase accounting adjustments, net		7,899			(1,186	)
Provision for loan losses		12,565			445
Share-based equity compensation expense		8,927			7,999
Loss (Gain) on sale of assets, net		7			(51	)
Gain on sale of available for sale investments		(609	)		(2,259	)
Gain on sale of OREO, net		(3,253	)		(5,211	)
Loss on abandonment of fixed assets		—			4,941
Impairment of FDIC loss share receivables		5,097			31,813
Amortization of premium/discount on investments		10,248			15,426
Derivative (gains) losses on swaps		1			(209	)
(Benefit) provision for deferred income taxes		(24,328	)		(7,802	)
Originations of mortgage loans held for sale		(1,218,684	)		(1,712,557	)
Proceeds from sales of mortgage loans held for sale		1,234,694			1,923,455
Gain on sale of mortgage loans held for sale, net		(41,412	)		(51,709	)
Tax benefit associated with share-based payment arrangements		(1,163	)		(495	)
Decrease (Increase) in other assets		21,553			(15,759	)
Other operating activities, net		(14,634	)		30,079
Net Cash Provided by Operating Activities		79,785			276,270
Cash Flows from Investing Activities
Proceeds from sales of securities available for sale		20,531			44,672
Proceeds from maturities, prepayments and calls of securities available for sale		413,069			618,059
Purchases of securities available for sale		(540,197	)		(935,341	)
Proceeds from maturities, prepayments and calls of securities held to maturity		32,880			54,372
Purchases of securities held to maturity		—			(5,901	)
Reimbursement of recoverable covered asset losses (to) from the FDIC		(457	)		56,311
Increase in loans receivable, net		(476,329	)		(595,315	)
Proceeds from sale of premises and equipment		6,217			7,371
Purchases of premises and equipment		(26,587	)		(12,592	)
Proceeds from disposition of real estate owned		69,124			76,150
Investment in tax credit entities		(10,384	)		(1,696	)
Cash received in excess of cash paid for acquisition		188,803			—
Other investing activities, net		(16,073	)		8,963
Net Cash Used in Investing Activities		(339,403	)		(684,947	)
Cash Flows from Financing Activities
Increase in deposits, net of deposits acquired		497,970			202,959
Net change in short-term borrowings, net of borrowings acquired		77,338			(44,196	)
Proceeds from long-term debt		4,637			2,230
Repayments of long-term debt		(21,012	)		(143,625	)
Dividends paid to shareholders		(31,701	)		(30,223	)
Proceeds from sale of treasury stock for stock options exercised		11,141			5,441
Payments to repurchase common stock		(3,307	)		(1,933	)
Common stock issued		—			—
Tax benefit associated with share-based payment arrangements		1,163			495
Net Cash Provided by (Used in) Financing Activities		536,229			(8,852	)
Net Increase (Decrease) In Cash and Cash Equivalents		276,611			(417,529	)
Cash and Cash Equivalents at Beginning of Period		391,396			970,977
Cash and Cash Equivalents at End of Period	$	668,007		$	553,448
Supplemental Schedule of Noncash Activities
Acquisition of real estate in settlement of loans	$	20,219		$	82,383
Common stock issued in acquisition	$	214,665			—
Transfers of property into Other Real Estate	$	30,442		$	82,383
Supplemental Disclosures
Cash paid for:
Interest on deposits and borrowings	$	30,984		$	36,888
Income taxes, net	$	42,933		$	19,891

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

6

IBERIABANK CORPORATION AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

NOTE 1 – BASIS OF PRESENTATION

The accompanying unaudited consolidated financial statements have been prepared in accordance with generally accepted accounting principles for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include information or footnotes necessary for a complete presentation of financial position, results of operations and cash flows in conformity with generally accepted accounting principles. These interim financial statements should be read in conjunction with the audited consolidated financial statements and note disclosures for IBERIABANK Corporation (the “Company”) previously filed with the Securities and Exchange Commission (the “SEC”) in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013.

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, valuation of and accounting for acquired loans, and valuation of goodwill, intangible assets and other purchase accounting adjustments.

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.

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.

7

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. Examples may include certain collateralized mortgage and debt obligations.

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). See Note 17 for additional information related to mortgage loans held for sale.

Impaired loans

Loans are measured for impairment using the methods permitted by Accounting Standards Codification (‘‘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 September 30, 2014 and December 31, 2013 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 $0.5 million and $1.4 million in earnings for the three months ended September 30, 2014 and 2013, respectively, and $1.9 million and $4.0 million for the nine months ended September 30, 2014 and 2013, 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 lock commitments 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 lock commitments, forward sales contracts, 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. See Note 12 for further discussion and details related to derivative financial instruments.

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 credit (“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. Alternatively, 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, with early adoption permitted. If 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 that a change in accounting policy would have on its consolidated financial statements, but does not anticipate that the potential accounting policy change to the proportional amortization method 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

8

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, with early adoption permitted. 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 obligations 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 the adoption of this ASU will have on its consolidated financial statements, but the Company does not expect 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 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 2014-11 also require certain disclosures for transfer of financial assets and repurchase agreements.

ASU 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 that the adoption of this ASU will have on its Consolidated financial statements, but the Company 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 that the adoption of this ASU will have on its consolidated financial statements, but the Company does not expect that such adoption will have a significant impact on the Company’s consolidated financial statements.

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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. These awards are included in the calculation of basic earnings per share 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.

The following table presents the calculation of basic and diluted earnings per share for the periods indicated.

	For the Three Months Ended						For the Nine Months Ended
	September 30						September 30
(Dollars in thousands, except per share data)	2014			2013			2014			2013
Income available to common shareholders	$	29,744		$	23,192		$	70,687		$	39,499
Distributed earnings (capital) to unvested restricted stock		(444	)		(421	)		(1,134	)		(744	)
Distributed earnings (capital) to common shareholders—basic		29,300			22,771			69,553			38,755
Undistributed earnings reallocated to unvested restricted stock		(4	)		(4	)		(25	)		—
Distributed and undistributed earnings to common shareholders—diluted	$	29,296		$	22,767		$	69,528		$	38,755
Weighted average shares outstanding—basic (1)		33,309,881			29,631,799			31,316,267			29,582,081
Weighted average shares outstanding—diluted		32,926,969			29,147,232			30,923,050			29,062,238
Earnings per common share—basic	$	0.89		$	0.78		$	2.26		$	1.34
Earnings per common share—diluted		0.89			0.78			2.25			1.33
Earnings per unvested restricted stock share—basic		0.88			0.77			2.16			1.33
Earnings per unvested restricted stock share—diluted		0.89			0.78			2.21			1.33

(1) Weighted average basic shares outstanding include 506,464 and 547,155 shares of unvested restricted stock for the three months ended September 30, 2014 and 2013, respectively, and 525,441 and 559,556 shares for the nine months ended September 30, 2014 and 2013, respectively.

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Additional information on the Company’s basic earnings per common share is shown in the following table.

	For the Three Months Ended				For the Nine Months Ended
	September 30				September 30
(Dollars in thousands, except per share data)	2014		2013		2014		2013
Distributed earnings to common shareholders	$	11,200	$	9,926	$	32,430	$	29,736
Undistributed earnings (distributed capital) to common shareholders		18,100		12,845		37,123		9,019
Total earnings to common shareholders	$	29,300	$	22,771	$	69,553	$	38,755
Distributed earnings to unvested restricted stock	$	170	$	183	$	529	$	571
Undistributed earnings (distributed capital) to unvested restricted stock		274		238		605		173
Total earnings allocated to restricted stock	$	444	$	421	$	1,134	$	744
Distributed earnings per common share	$	0.34	$	0.34	$	1.05	$	1.03
Undistributed earnings (distributed capital) per common share		0.55		0.44		1.21		0.31
Total earnings per common share—basic	$	0.89	$	0.78	$	2.26	$	1.34
Distributed earnings per unvested restricted stock share	$	0.34	$	0.34	$	1.01	$	1.02
Undistributed earnings (distributed capital) per unvested restricted stock share		0.54		0.43		1.15		0.31
Total earnings per unvested restricted stock share—basic	$	0.88	$	0.77	$	2.16	$	1.33

For the three months ended September 30, 2014 and 2013, the calculations for basic shares outstanding exclude the weighted average shares owned by the Recognition and Retention Plan (“RRP”) of 621,341 and 642,764, respectively, and are adjusted for the weighted average shares in treasury stock of 1,838,144 and 2,189,978, respectively. For the nine months ended September 30, 2014 and 2013, basic shares outstanding exclude 630,320 and 645,793 shares owned by the RRP, respectively, and are adjusted for 1,901,277 and 2,249,068 shares, respectively, of weighted average shares of treasury stock.

The effects from the assumed exercises of 12,765 and 402,344 stock options were not included in the computation of diluted earnings per share for the three months ended September 30, 2014 and 2013, respectively, because such amounts would have had an antidilutive effect on earnings per common share. For the nine months ended September 30, 2014 and 2013, the effects from the assumed exercise of 12,765 and 678,604 stock options, respectively, was not included in the computation of diluted earnings per share because such amounts would have had an antidilutive effect on earnings per common share.

NOTE 4 –ACQUISITION ACTIVITY

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 (hereby referred to as “Trust One-Memphis”). Under terms of the agreement, Synovus Bank paid IBERIABANK $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 Metropolitan Statistical Area (“MSA”) through the addition of four branches and an experienced in-market team that enhances IBERIABANK’s ability to compete in that market.

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Acquisition of Teche Holding Company

On May 31, 2014, the Company acquired Teche Holding Company (“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 option to purchase Teche 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 $84.8 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				71,954
Goodwill			$	84,786

Acquisition of First Private Holdings, Inc.

On June 30, 2014, the Company acquired First Private Holdings, Inc. (“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 $30.6 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 liabilities assumed including identifiable intangible assets				28,029
Goodwill			$	30,611

The Company accounted for the aforementioned business combinations as purchase business combinations. 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 of the current and deferred tax balances acquired, as well as the fair values of loans acquired, core deposit intangible asset, and the deferred tax assets or liabilities created from the acquisition. 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.

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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			Preliminary
			Fair Value			As recorded by
(Dollars in thousands)	As Acquired		Adjustments			IBERIABANK
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			Preliminary
			Fair Value			As recorded by
(Dollars in thousands)	As Acquired		Adjustments			IBERIABANK
Assets
Cash and cash equivalents	$	71,611	$	—		$	71,611
Investment securities		24,077		1,092	(1)		25,169
Loans		716,196		(16,636	)(2)		699,560
Other real estate owned		329		(153	)(3)		176
Core deposit intangible		—		2,055	(4)		2,055
Deferred tax asset		1,057		7,337	(5)		8,394
Other assets		56,752		(6,261	)(6)		50,491
Total Assets	$	870,022	$	(12,566	)	$	857,456
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		5,366		—			5,366
Total Liabilities	$	778,296	$	7,206		$	785,502

Explanation of certain fair value adjustments

⁽¹⁾  The amount represents the adjustment to 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 write down 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.

⁽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 is necessary because the interest rate of Teche’s borrowings exceeded current interest rates on similar borrowings.

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First Private			Preliminary
			Fair Value			As recorded by
(Dollars in thousands)	As Acquired		Adjustments			IBERIABANK
Assets
Cash and cash equivalents	$	26,621	$	—		$	26,621
Investment securities		18,920		297	(1)		19,217
Loans		295,736		(910	)(2)		294,826
Other real estate owned		—		—			—
Core deposit intangible		—		506	(3)		506
Deferred tax asset (liability)		530		122	(4)		652
Other assets		5,230		—			5,230
Total Assets	$	347,037	$	15		$	347,052
Liabilities
Interest-bearing deposits	$	261,713	$	220	(5)	$	261,933
Non-interest-bearing deposits		50,333		—			50,333
Borrowings		6,451		—			6,451
Other liabilities		306		—			306
Total Liabilities	$	318,803	$	220		$	319,023

Explanation of certain fair value adjustments

⁽¹⁾  The amount represents the adjustment to 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 liability 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 85 months.

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Acquisitions of LTC

On February 24, 2014, the Company’s subsidiary, LTC, acquired the assets of 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 the assets of 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. 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 purchase 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 was greater than the net fair value of the acquired 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:

			Louisiana Abstract and Title
(Dollars in thousands)	The Title Company LLC		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 unaudited pro forma information

The following unaudited pro forma information for the nine months ended September 30, 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
Interest and non-interest income	$	500,638
Net income		46,139
Earnings per share—basic		1.40
Earnings per share—diluted		1.40

The Company’s consolidated financial statements as of and for the nine months ended September 30, 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 nine-month period 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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NOTE 5 – INVESTMENT SECURITIES

The amortized cost and fair values of investment securities, with gross unrealized gains and losses, consist of the following:

	September 30, 2014
			Gross		Gross			Estimated
	Amortized		Unrealized		Unrealized			Fair
(Dollars in thousands)	Cost		Gains		Losses			Value
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	359,404	$	1,465	$	(5,926	)	$	354,943
Obligations of state and political obligations		87,895		3,891		—			91,786
Mortgage-backed securities		1,656,341		11,613		(12,338	)		1,655,616
Other securities		1,460		23		—			1,483
Total securities available for sale	$	2,105,100	$	16,992	$	(18,264	)	$	2,103,828
Securities held to maturity:
U.S. Government-sponsored enterprise obligations	$	10,000	$	157	$	—		$	10,157
Obligations of state and political obligations		79,309		3,044		(266	)		82,087
Mortgage-backed securities		31,211		197		(1,194	)		30,214
Total securities held to maturity	$	120,520	$	3,398	$	(1,460	)	$	122,458
	December 31, 2013
			Gross		Gross			Estimated
	Amortized		Unrealized		Unrealized			Fair
(Dollars in thousands)	Cost		Gains		Losses			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

Securities with carrying values of $1.4 billion and $1.5 billion were pledged to secure public deposits and other borrowings at September 30, 2014 and December 31, 2013, respectively.

Management evaluates securities for other-than-temporary impairment at least quarterly, and more frequently when economic or market concerns warrant such evaluation. Consideration is given to 1) the length of time and extent to which the estimated fair value has been less than amortized cost, 2) the financial condition and near-term prospects of the issuer, and 3) the intent of the Company to retain the investment for a period of time sufficient to allow for any anticipated recovery in estimated fair value above amortized cost. In analyzing an issuer’s financial condition, management considers whether the securities are issued by the federal government or its agencies and whether downgrades by bond rating agencies have occurred, as well as review of issuer financial statements and industry analysts’ reports.

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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:

	September 30, 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	$	—		$	—	$	(5,926	)	$	258,521	$	(5,926	)	$	258,521
Obligations of state and political obligations		—			186		—			—		—			186
Mortgage-backed securities		(2,846	)		552,357		(9,492	)		333,795		(12,338	)		886,152
Total securities available for sale	$	(2,846	)	$	552,543	$	(15,418	)	$	592,316	$	(18,264	)	$	1,144,859
Securities held to maturity:
Obligations of state and political obligations	$	(1	)	$	564	$	(265	)	$	10,811	$	(266	)	$	11,375
Mortgage-backed securities		—			72		(1,194	)		24,303		(1,194	)		24,375
Total securities held to maturity	$	(1	)	$	636	$	(1,459	)	$	35,114	$	(1,460	)	$	35,750
	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 September 30, 2014 and December, 31, 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.

18

At September 30, 2014, 162 debt securities had unrealized losses of 1.64% of the securities’ amortized cost basis and 0.89% of the Company’s total amortized cost basis. At December 31, 2013, 207 debt securities had unrealized losses of 3.23% of the securities’ amortized cost basis and 2.07% of the Company’s total 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 September 30, 2014 and December 31, 2013 is presented in the following table.

(Dollars in thousands)	September 30, 2014		December 31, 2013
Number of securities
Issued by Fannie Mae, Freddie Mac, or Ginnie Mae		78		20
Issued by political subdivisions		6		5
		84		25
Amortized Cost Basis
Issued by Fannie Mae, Freddie Mac, or Ginnie Mae	$	633,230	$	104,520
Issued by political subdivisions		11,076		7,956
	$	644,306	$	112,476
Unrealized Loss
Issued by Fannie Mae, Freddie Mac, or Ginnie Mae	$	16,611	$	5,519
Issued by political subdivisions		265		669
	$	16,876	$	6,188

The Fannie Mae, Freddie Mac, and Ginnie Mae securities are rated AA+ by S&P and Aaa by Moodys. Six 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 2013, 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. Changes to the unobservable inputs used by the Company would have resulted in a higher or lower impairment charge, but the unobservable inputs were not highly sensitive and would not result in a material difference in the impairment charge recorded. 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 unaudited consolidated statements of comprehensive income for the three and nine months ended September 30, 2014.

During the nine months ended September 30, 2014 and 2013, there was no activity related to credit losses on the other-than temporarily impaired investment security where a portion of the unrealized loss was recognized in other comprehensive income.

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 September 30, 2014 or December 31, 2013.

The amortized cost and estimated fair value of investment securities by maturity at September 30, 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
	Weighted					Estimated		Weighted					Estimated
	Average			Amortized		Fair		Average			Amortized		Fair
(Dollars in thousands)	Yield			Cost		Value		Yield			Cost		Value
Within one year or less		1.27	%	$	15,397	$	15,488		2.65	%	$	10,000	$	10,157
One through five years		1.54			241,992		241,502		2.84			12,968		13,352
After five through ten years		2.10			474,758		476,954		2.97			17,983		18,591
Over ten years		2.18			1,372,953		1,369,884		3.05			79,569		80,358
Total		2.08	%	$	2,105,100	$	2,103,828		2.98	%	$	120,520	$	122,458

19

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.

	Three Months Ended					Nine Months Ended
	September 30					September 30
(Dollars in thousands)	2014		2013			2014		2013
Realized gains	$	582	$	—		$	609	$	2,369
Realized losses		—		(3	)		—		(110	)
Net realized gains (losses)	$	582	$	(3	)	$	609	$	2,259

In addition to the gains above, the Company realized certain immaterial gains on calls of held to maturity securities.

Other Equity Securities

At September 30, 2014 and December 31, 2013, the Company included the following securities in “Other assets” on the consolidated balance sheets:

	September 30		December 31
(Dollars in thousands)	2014		2013
Federal Home Loan Bank (FHLB) stock	$	41,011	$	24,369
Federal Reserve Bank (FRB) stock		34,348		28,098
Other investments		1,306		1,306
Total	$	76,665	$	53,773

20

NOTE 6 – LOANS RECEIVABLE

Loans receivable consist of the following, segregated into non-covered and covered loans, for the periods indicated:

	September 30, 2014
(Dollars in thousands)	Non-covered loans		Covered loans		Total
Commercial loans:
Real estate	$	4,032,419	$	247,156	$	4,279,575
Business		3,193,098		34,234		3,227,332
		7,225,517		281,390		7,506,907
Residential mortgage loans:
Residential 1-4 family		911,099		130,976		1,042,075
Construction / Owner Occupied		27,888		—		27,888
		938,987		130,976		1,069,963
Consumer and other loans:
Home equity		1,458,067		107,811		1,565,878
Indirect automobile		394,691		—		394,691
Other		537,748		4,012		541,760
		2,390,506		111,823		2,502,329
Total	$	10,555,010	$	524,189	$	11,079,199
	December 31, 2013
(Dollars in thousands)	Non-covered loans		Covered loans		Total
Commercial loans:
Real estate	$	3,479,973	$	387,332	$	3,867,305
Business		2,959,088		37,025		2,996,113
		6,439,061		424,357		6,863,418
Residential mortgage loans:
Residential 1-4 family		423,057		154,025		577,082
Construction / Owner Occupied		9,450		—		9,450
		432,507		154,025		586,532
Consumer and other loans:
Home equity		1,154,670		137,122		1,291,792
Indirect automobile		375,236		—		375,236
Other		370,752		4,289		375,041
		1,900,658		141,411		2,042,069
Total	$	8,772,226	$	719,793	$	9,492,019

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 deposit 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 of the CSB, Orion, Century, and Sterling loans and foreclosed real estate are significantly different from those assets not covered under the loss share agreements. Accordingly, the Company presents loans subject to the loss share agreements as “covered loans” and loans that are not subject to the loss share agreements as “non-covered loans.”

Deferred loan origination fees were $19.4 million and $18.6 million and deferred loan expenses were $9.0 million and $7.6 million at September 30, 2014 and December 31, 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 September 30, 2014 and December 31, 2013, overdrafts of $3.7 million and $3.1 million, respectively, have been reclassified to loans receivable.

Loans with carrying values of $2.7 billion and $2.3 billion were pledged to secure public deposits and other borrowings at September 30, 2014 and December 31, 2013, respectively.

21

Non-covered Loans

The following tables provide an analysis of the aging of non-covered loans as of September 30, 2014 and December 31, 2013. Because of the difference in accounting for acquired loans, the tables below further segregate the Company’s non-covered loans receivable between acquired loans and loans originated by the Company. For purposes of the following tables, subprime mortgage loans are defined as the Company’s mortgage loans that have FICO scores that are less than 620 at the time of origination or were purchased outside of a business combination.

	September 30, 2014
	Non-covered loans excluding acquired loans
											Total Non-covered		Recorded
	Past Due (1)										Loans, Net of		Investment > 90 days
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total		Current		Unearned Income		and Accruing
Commercial real estate construction	$	84	$	—	$	1,317	$	1,401	$	634,593	$	635,994	$	—
Commercial real estate—other		1,347		640		6,789		8,776		2,882,842		2,891,618		—
Commercial business		1,475		44		2,737		4,256		3,089,617		3,093,873		—
Residential prime		1,859		1,349		10,973		14,181		362,513		376,694		—
Residential subprime		—		2		6,197		6,199		114,182		120,381		—
Home equity		1,783		201		7,310		9,294		1,220,704		1,229,998		4
Indirect automobile		1,825		502		1,338		3,665		390,413		394,078		—
Credit card		149		123		987		1,259		67,472		68,731		—
Other		720		337		416		1,473		367,102		368,575		—
Total	$	9,242	$	3,198	$	38,064	$	50,504	$	9,129,438	$	9,179,942	$	4
	December 31, 2013
	Non-covered loans excluding acquired loans
											Total Non-covered		Recorded
	Past Due (1)										Loans, Net of		Investment > 90 days
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total		Current		Unearned Income		and Accruing
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 prime		1,104		852		9,684		11,640		286,167		297,807		1,073
Residential subprime		—		—		1,626		1,626		114,939		116,565		—
Home equity		1,956		569		6,808		9,333		1,091,894		1,101,227		—
Indirect automobile		1,427		293		1,275		2,995		370,388		373,383		—
Credit card		266		92		411		769		62,873		63,642		—
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 include loans on nonaccrual status as of the period indicated. Nonaccrual loans are presented separately in the “Nonaccrual Loans” section below.

22

	September 30, 2014
	Non-covered acquired loans
														Total Non-covered		Recorded
	Past Due (1)													Loans, Net of		Investment > 90 days
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total		Current		Discount/ Premium			Unearned Income		and Accruing
Commercial real estate construction	$	340	$	45	$	2,118	$	2,503	$	36,832	$	(2,061	)	$	37,274	$	1,821
Commercial real estate—other		1,464		277		22,081		23,822		486,238		(42,527	)		467,533		20,614
Commercial business		717		25		1,905		2,647		101,722		(5,144	)		99,225		1,892
Residential prime		76		931		7,437		8,444		432,837		631			441,912		369
Home equity		1,615		1,003		8,203		10,821		228,051		(10,803	)		228,069		4,102
Indirect automobile		7		1		43		51		606		(44	)		613		43
Other		337		7		2,051		2,395		109,599		(11,552	)		100,442		389
Total	$	4,556	$	2,289	$	43,838	$	50,683	$	1,395,885	$	(71,500	)	$	1,375,068	$	29,230
	December 31, 2013
	Non-covered acquired loans
														Total Non-covered		Recorded
	Past Due (1)													Loans, Net of		Investment > 90 days
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total		Current		Discount/ Premium			Unearned Income		and Accruing
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 prime		—		—		226		226		18,796		(887	)		18,135		226
Home equity		313		516		4,242		5,071		53,995		(5,623	)		53,443		4,242
Indirect automobile		33		—		95		128		1,725		—			1,853		95
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 non-covered loans, excluding acquired loans, on non-accrual status at September 30, 2014 and December 31, 2013.

	September 30		December 31
(Dollars in thousands)	2014		2013
Commercial real estate construction	$	1,317	$	1,803
Commercial real estate—other		6,789		7,648
Commercial business		2,737		15,020
Residential prime		10,973		8,611
Residential subprime		6,197		1,626
Home equity		7,306		6,808
Indirect automobile		1,338		1,275
Credit card		987		411
Other		416		485
Total	$	38,060	$	43,687

23

Covered Loans

The carrying amount of the acquired covered loans at September 30, 2014 and December 31, 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.

	September 30, 2014
	Acquired		Acquired		Total
	Impaired		Performing		Covered
(Dollars in thousands)	Loans		Loans		Loans
Commercial loans:
Real estate	$	4,678	$	242,478	$	247,156
Business		620		33,614		34,234
		5,298		276,092		281,390
Residential mortgage loans:
Residential 1-4 family		24,304		106,672		130,976
Construction / Owner Occupied		—		—		—
		24,304		106,672		130,976
Consumer and other loans:
Home equity		16,210		91,601		107,811
Indirect automobile		—		—		—
Other		489		3,523		4,012
		16,699		95,124		111,823
Total	$	46,301	$	477,888	$	524,189
	December 31, 2013
	Acquired		Acquired		Total
	Impaired		Performing		Covered
(Dollars in thousands)	Loans		Loans		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

24

Loans Acquired

The Company acquired loans (both covered and non-covered) through previous acquisitions, which are subject to ASC Topic 310-30.

As discussed in Note 4, during 2014, the Company acquired loans of $86.5 million from Trust One-Memphis, $699.6 million from Teche, and $294.8 million from First Private in the current period. Acquired loans totaling $1.1 billion are accounted for under ASC Topic 310-10, while the carrying amounts of the loans acquired in the current period subject to ASC Topic 310-30 are detailed in the following table as of the purchase date. The allocation of loans acquired from both Teche and First Private between loans subject to ASC Topic 310-30 and those subject to ASC Topic 310-10 is preliminary and subject to change up to one year after the acquisition date as information on these loans becomes available.

	Acquired			Acquired			Total
	Impaired			Performing			Acquired
(Dollars in thousands)	Loans			Loans			Loans
Contractually required principal and interest at acquisition	$	82,967		$	15,130		$	98,097
Nonaccretable difference (expected losses and foregone interest)		(4,197	)		(361	)		(4,558	)
Cash flows expected to be collected at acquisition		78,770			14,769			93,539
Accretable yield		(8,242	)		(1,536	)		(9,778	)
Basis in acquired loans at acquisition	$	70,528		$	13,233		$	83,761

The following is a summary of changes in the accretable difference of acquired loans during the nine months ended September 30, 2014 and 2013.

	September 30, 2014
	Acquired			Acquired			Total
	Impaired			Performing			Acquired
(Dollars in thousands)	Loans			Loans			Loans
Balance at beginning of period	$	78,349		$	276,543		$	354,892
Acquisition		8,242			1,536			9,778
Transfers from nonaccretable difference to accretable yield		3,952			13,872			17,824
Accretion		(12,766	)		(66,590	)		(79,356	)
Changes in expected cash flows not affecting nonaccretable differences (1)		(6,873	)		(19,377	)		(26,250	)
Balance at end of period	$	70,904		$	205,984		$	276,888
	September 30, 2013
	Acquired			Acquired			Total
	Impaired			Performing			Acquired
	Loans			Loans			Loans
Balance at beginning of period	$	76,623		$	279,770		$	356,393
Transfers from nonaccretable difference to accretable yield		6,148			34,480			40,628
Accretion		(13,519	)		(119,193	)		(132,712	)
Changes in expected cash flows not affecting nonaccretable differences (1)		10,561			81,173			91,734
Balance at end of period	$	79,813		$	276,230		$	356,043

⁽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.

25

Troubled Debt Restructurings

Information about the Company’s troubled debt restructurings (“TDRs”) at September 30, 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 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 acquired loans that would otherwise meet the criteria for classification as a TDR are excluded from the tables below.

	September 30, 2014								September 30, 2013
	Accruing Loans								Accruing Loans
			Past Due		Nonaccrual						Past Due		Nonaccrual
(Dollars in thousands)	Current		> 30 days		TDRs		Total TDRs		Current		> 30 days		TDRs		Total TDRs
Commercial real estate construction	$	—	$	—	$	—	$	—	$	—		—		—		—
Commercial real estate—other		367		—		58		425		411		—		5,601		6,012
Commercial business		726		—		2,027		2,753		1,056		—		12,610		13,666
Residential prime		—		—		—		—		—		—		—		—
Residential subprime		—		—		—		—		—		—		—		—
Home equity		—		—		243		243		—		—		263		263
Indirect automobile		—		—		—		—		—		—		—		—
Credit card		—		—		—		—		—		—		—		—
Other		—		—		—		—		—		—		—		—
Total	$	1,093	$	—	$	2,328	$	3,421	$	1,467	$	—	$	18,474	$	19,941

At September 30, 2014, there were no TDRs that occurred during the first nine months through modification of the original loan terms. TDRs totaling $11.2 million occurred during the nine-month period ending September 30, 2013 and were subsequently charged off during the same period. The following table provides information on how the TDRs were modified during the nine months ended September 30:

(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		—		—
Other concession(s) (1)		—		11,210
Total	$	—	$	11,210

⁽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 business, mortgage or consumer TDRs that were added during the nine month periods for September 30, 2014 and 2013. Information about the Company’s TDRs occurring in these periods is presented in the following table.

	September 30, 2014						September 30, 2013
			Pre-modification		Post-modification				Pre-modification		Post-modification
			Outstanding		Outstanding				Outstanding		Outstanding
	Number of		Recorded		Recorded		Number of		Recorded		Recorded
(In thousands, except number of loans)	Loans		Investment		Investment (1)		Loans		Investment		Investment (1)
Commercial real estate		—	$	—	$	—		5	$	12,507	$	12,329
Total		—	$	—	$	—		5	$	12,507	$	12,329

⁽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.

26

	September 30, 2014				September 30, 2013
	Number of		Recorded		Number of		Recorded
(In thousands, except number of loans)	Loans		Investment		Loans		Investment
Commercial real estate		31	$	58		45	$	6,012
Commercial business		11		1,767		13		12,370
Residential prime		—		—		—		—
Home Equity		—		—		1		47
Indirect automobile		—		—		—		—
Credit card		—		—		—		—
Other		1		—		1		—
Total		43	$	1,825		60	$	18,429

27

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 nine months ended September 30, 2014 and 2013 is as follows:

	September 30, 2014
	Non-covered loans
	Excluding
(Dollars in thousands)	Acquired 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		9,099			(1,259	)		5,878			13,718
Adjustment attributable to FDIC loss share arrangements		—			—			(1,153	)		(1,153	)
Net (reversal of) provision for loan losses		9,099			(1,259	)		4,725			12,565
Adjustment attributable to FDIC loss share arrangements		—			—			1,153			1,153
Transfer of balance to OREO		—			(207	)		(5,171	)		(5,378	)
Loans charged-off		(8,242	)		(586	)		(12,823	)		(21,651	)
Recoveries		4,338			401			38			4,777
Balance at end of period	$	72,537		$	2,906		$	59,097		$	134,540
Reserve for unfunded lending commitments
Balance, beginning of period	$	11,147		$	—		$	—		$	11,147
Provision for unfunded lending commitments		952			—			—			952
Balance at end of period	$	12,099		$	—		$	—		$	12,099
	September 30, 2013
	Non-covered loans
	Excluding
	Acquired 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		2,884			(2,464	)		(58,540	)		(58,120	)
Adjustment attributable to FDIC loss share arrangements		—			—			58,565			58,565
Net (reversal of) provision for loan losses		2,884			(2,464	)		25			445
Adjustment attributable to FDIC loss share arrangements		—			—			(58,565	)		(58,565	)
Transfer of balance to OREO		—			(1,013	)		(29,302	)		(30,315	)
Transfer of balance to the RULC		(9,828	)		—			—			(9,828	)
Loans charged-off		(7,455	)		(10	)		(1,683	)		(9,148	)
Recoveries		4,353			—			—			4,353
Balance at end of period		64,165			5,329		$	79,051		$	148,545
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		2,131			—			—			2,131
Balance at end of period	$	11,959		$	—		$	—		$	11,959

28

A summary of changes in the allowance for credit losses for non-covered loans, by loan portfolio type, for the nine months ended September 30, 2014 and 2013 is as follows:

	September 30, 2014
	Commercial			Commercial
(Dollars in thousands)	real estate			business			Mortgage			Consumer			Unallocated		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		611			2,187			514			4,528			—		7,840
Transfer of balance to OREO		—			(130	)		(12	)		(65	)		—		(207	)
Loans charged off		(1,214	)		(1,097	)		(607	)		(5,910	)		—		(8,828	)
Recoveries		2,209			93			134			2,303			—		4,739
Balance at end of period	$	28,196		$	29,568		$	2,575		$	15,104		$	—	$	75,443
Reserve for unfunded commitments
Balance at beginning of period	$	3,089		$	4,839		$	72		$	3,147		$	—	$	11,147
(Reversal of) Provision for unfunded commitments		726			192			11			23			—		952
Balance at end of period	$	3,815		$	5,031		$	83		$	3,170		$	—	$	12,099
Allowance on loans individually evaluated for impairment	$	25		$	—		$	—		$	—		$	—	$	25
Allowance on loans collectively evaluated for impairment		28,171			29,568			2,575			15,104			—		75,418
Loans, net of unearned income:
Balance at end of period	$	4,032,419		$	3,193,098		$	938,987		$	2,390,506		$	—	$	10,555,010
Balance at end of period individually evaluated for impairment		7,357			3,276			—			706			—		11,339
Balance at end of period collectively evaluated for impairment		4,025,062			3,189,822			938,987			2,389,800			—		10,543,671
Balance at end of period acquired with deteriorated credit quality		15,061			2,562			160			1,707			—		19,490
	September 30, 2013
	Commercial			Commercial
(Dollars in thousands)	real estate			business			Mortgage			Consumer			Unallocated		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		(6,926	)		(582	)		1,048			6,880			—		420
Transfer of balance to OREO		(279	)		(81	)		(646	)		(7	)		—		(1,013	)
Transfer of balance to the RULC		(2,939	)		(3,497	)		(40	)		(3,352	)		—		(9,828	)
Loans charged off		(1,966	)		(531	)		(481	)		(4,487	)		—		(7,465	)
Recoveries		1,498			354			698			1,803			—		4,353
Balance at end of period	$	27,652		$	24,384		$	2,704		$	14,754		$	—	$	69,494
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		1,207			610			38			276					2,131
Balance at end of period	$	4,146		$	4,107		$	78		$	3,628		$	—	$	11,959
Allowance on loans individually evaluated for impairment	$	8		$	801		$	283		$	—		$	—	$	1,092
Allowance on loans collectively evaluated for impairment		27,644			23,583			2,421			14,754			—		68,402
Loans, net of unearned income:
Balance at end of period	$	3,320,333		$	2,643,822		$	409,940		$	1,861,940		$	—	$	8,236,035
Balance at end of period individually evaluated for impairment		9,529			14,548			1,407			263			—		25,747
Balance at end of period collectively evaluated for impairment		3,310,804			2,629,274			408,533			1,861,677			—		8,210,288
Balance at end of period acquired with deteriorated credit quality		16,287			45			120			1,815			—		18,267

29

A summary of changes in the allowance for credit losses for covered loans, by loan portfolio type, for the nine months ended September 30, 2014 and 2013 is as follows:

	September 30, 2014
	Commercial			Commercial
(Dollars in thousands)	real estate			business			Mortgage			Consumer			Unallocated		Total
Allowance for loan losses
Balance at beginning of period	$	38,772		$	5,380		$	10,889		$	16,134		$	—	$	71,175
Provision for loan losses		2,544			376			971			834			—		4,725
(Decrease) Increase in FDIC loss share receivable		734			609			(2,911	)		2,721			—		1,153
Transfer of balance to OREO		(1,874	)		(1,162	)		(648	)		(1,487	)		—		(5,171	)
Loans charged off		(9,578	)		(2,192	)		(90	)		(963	)		—		(12,823	)
Recoveries		38			—			—			—			—		38
Balance at end of period	$	30,636		$	3,011		$	8,211		$	17,239		$	—	$	59,097
Allowance on loans individually evaluated for impairment	$	—		$	—		$	—		$	—		$	—	$	—
Allowance on loans collectively evaluated for impairment		30,636			3,011			8,211			17,239			—		59,097
Loans, net of unearned income:
Balance at end of period	$	247,156		$	34,234		$	130,976		$	111,823		$	—	$	524,189
Balance at end of period individually evaluated for impairment		—			—			—			—			—		—
Balance at end of period collectively evaluated for impairment		247,156			34,234			130,976			111,823			—		524,189
Balance at end of period acquired with deteriorated credit quality		4,678			620			24,304			16,699			—		46,301
	September 30, 2013
	Commercial			Commercial
(Dollars in thousands)	real estate			business			Mortgage			Consumer			Unallocated		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		27			—			(1	)		(1	)		—		25
(Decrease) Increase in FDIC loss share receivable		(30,853	)		(3,137	)		(5,734	)		(18,841	)		—		(58,565	)
Transfer of balance to OREO		(22,375	)		(314	)		(6,614	)		1			—		(29,302	)
Loans charged off		(1,683	)		—			—			—			—		(1,683	)
Balance at end of period	$	45,987		$	7,924		$	10,217		$	14,923		$	—	$	79,051
Allowance on loans individually evaluated for impairment	$	—		$	—		$	—		$	—		$	—	$	—
Allowance on loans collectively evaluated for impairment		45,987			7,924			10,217			14,923			—		79,051
Loans, net of unearned income:
Balance at end of period	$	459,506		$	40,422		$	153,515		$	153,559		$	—	$	807,002
Balance at end of period individually evaluated for impairment		—			—			—			—			—		—
Balance at end of period collectively evaluated for impairment		459,506			40,422			153,515			153,559			—		807,002
Balance at end of period acquired with deteriorated credit quality		23,751			—			28,333			26,400			—		78,484

30

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 receivable between acquired loans and loans that were not acquired. 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 September 30, 2014 and December 31, 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 September 30, 2014 and December 31, 2013.

	Non-covered loans excluding acquired loans
	September 30, 2014										December 31, 2013
			Special										Special
(Dollars in thousands)	Pass		Mention		Substandard		Doubtful		Total		Pass		Mention		Substandard		Doubtful		Total
Commercial real estate construction	$	624,592	$	249	$	11,153	$	—	$	635,994	$	370,824	$	9,309	$	2,962	$	—	$	383,095
Commercial real estate—other		2,817,777		46,718		26,700		423		2,891,618		2,694,161		27,227		30,308		113		2,751,809
Commercial business		3,047,885		23,093		20,921		1,974		3,093,873		2,866,794		6,164		32,167		926		2,906,051
Total	$	6,490,254	$	70,060	$	58,774	$	2,397	$	6,621,485	$	5,931,779	$	42,700	$	65,437	$	1,039	$	6,040,955

	Non-covered loans excluding acquired loans
	September 30, 2014						December 31, 2013
			30+ Days						30+ Days
(Dollars in thousands)	Current		Past Due		Total		Current		Past Due		Total
Residential prime	$	362,513	$	14,181	$	376,694	$	286,167	$	11,640	$	297,807
Residential subprime		114,182		6,199		120,381		114,939		1,626		116,565
Home equity		1,220,704		9,294		1,229,998		1,091,894		9,333		1,101,227
Indirect automobile		390,413		3,665		394,078		370,388		2,995		373,383
Credit card		67,472		1,259		68,731		62,873		769		63,642
Consumer—other		367,102		1,473		368,575		293,693		1,049		294,742
Total	$	2,522,386	$	36,071	$	2,558,457	$	2,219,954	$	27,412	$	2,247,366

	Non-covered acquired loans
	September 30, 2014													December 31, 2013
			Special													Special
(Dollars in thousands)	Pass		Mention		Substandard		Doubtful		Discount			Total		Pass		Mention		Substandard		Doubtful		Discount			Total
Commercial real estate construction	$	30,675	$	3,671	$	4,989	$	—	$	(2,061	)	$	37,274	$	17,132	$	196	$	5,435	$	—	$	(2,532	)	$	20,231
Commercial real estate—other		456,790		11,065		42,027		178		(42,527	)		467,533		310,303		15,351		51,267		93		(52,176	)		324,838
Commercial business		97,383		2,203		4,571		212		(5,144	)		99,225		51,414		1,920		2,586		31		(2,914	)		53,037
Total	$	584,848	$	16,939	$	51,587	$	390	$	(49,732	)	$	604,032	$	378,849	$	17,467	$	59,288	$	124	$	(57,622	)	$	398,106

	Non-covered acquired loans
	September 30, 2014									December 31, 2013
			30+ Days		Premium							30+ Days		Premium
(Dollars in thousands)	Current		Past Due		(discount)			Total		Current		Past Due		(discount)			Total
Residential prime	$	432,837	$	8,444	$	631		$	441,912	$	18,796	$	226	$	(887	)	$	18,135
Home equity		228,051		10,821		(10,803	)		228,069		53,995		5,071		(5,623	)		53,443
Indirect automobile		606		51		(44	)		613		1,725		128		—			1,853
Consumer—other		109,599		2,395		(11,552	)		100,442		12,598		1,251		(1,481	)		12,368
Total	$	771,093	$	21,711	$	(21,768	)	$	771,036	$	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 fair value at the date indicated, as adjusted for income accretion and changes in cash flow estimates in subsequent periods.

31

	Covered loans
	September 30, 2014											December 31, 2013
			Special											Special
(Dollars in thousands)	Pass		Mention		Substandard		Doubtful		Total			Pass		Mention		Substandard		Doubtful		Total
Commercial real estate construction	$	40,754	$	1,822	$	9,285	$	—	$	51,861		$	42,886	$	7,401	$	23,891	$	497	$	74,675
Commercial real estate—other		113,309		22,277		75,353		—		210,939			148,579		49,699		144,680		3,267		346,225
Commercial business		26,087		887		8,814		46		35,834			30,710		780		14,556		984		47,030
	$	180,150	$	24,986	$	93,452	$	46	$	298,634		$	222,175	$	57,880	$	183,127	$	4,748	$	467,930
Discount										(17,244	)										(43,573	)
Total									$	281,390										$	424,357

	Covered loans
	September 30, 2014									December 31, 2013
			30+ Days		Premium							30+ Days		Premium
(Dollars in thousands)	Current		Past Due		(discount)			Total		Current		Past Due		(discount)			Total
Residential prime	$	143,529	$	23,993	$	(36,546	)	$	130,976	$	158,710	$	30,814	$	(35,499	)	$	154,025
Home equity		115,813		19,403		(27,405	)		107,811		143,236		35,811		(41,925	)		137,122
Credit card		588		33		—			621		648		31		—			679
Consumer—other		498		23		2,870			3,391		591		144		2,875			3,610
Total	$	260,428	$	43,452	$	(61,081	)	$	242,799	$	303,185	$	66,800	$	(74,549	)	$	295,436

32

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.

	September 30, 2014							December 31, 2013
			Unpaid							Unpaid
	Recorded		Principal		Related			Recorded		Principal		Related
(Dollars in thousands)	Investment		Balance		Allowance			Investment		Balance		Allowance
With no related allowance recorded:
Commercial real estate	$	6,990	$	6,990	$	—		$	8,567	$	8,567	$	—
Commercial business		3,276		3,276		—			13,256		13,256		—
Home equity		689		689		—			258		258		—
With an allowance recorded:
Commercial real estate		1,450		1,483		(33	)		1,268		1,284		(16	)
Commercial business		186		188		(2	)		1,927		2,770		(843	)
Residential prime		10,746		10,973		(227	)		9,791		10,019		(228	)
Residential subprime		6,169		6,197		(28	)		1,617		1,626		(9	)
Home equity		7,017		7,064		(47	)		6,506		6,550		(44	)
Indirect automobile		1,330		1,338		(8	)		1,267		1,275		(8	)
Credit card		968		987		(19	)		404		411		(7	)
Other		429		433		(4	)		481		485		(4	)
Total	$	39,250	$	39,618	$	(368	)	$	45,342	$	46,501		(1,159	)
Total commercial loans		11,902		11,937		(35	)		25,018		25,877		(859	)
Total mortgage loans		16,915		17,170		(255	)		11,408		11,645		(237	)
Total consumer loans		10,433		10,511		(78	)		8,916		8,979		(63	)

	For the Three Months Ended September 30								For the Nine Months Ended September 30
	2014				2013				2014				2013
	Average		Interest		Average		Interest		Average		Interest		Average		Interest
	Recorded		Income		Recorded		Income		Recorded		Income		Recorded		Income
(Dollars in thousands)	Investment		Recognized		Investment		Recognized		Investment		Recognized		Investment		Recognized
With no related allowance recorded:
Commercial real estate	$	7,026	$	6	$	10,703	$	6	$	7,114	$	20	$	12,787	$	22
Commercial business		3,553		11		13,218		17		4,417		48		8,608		59
Home equity		692		—		265		—		700		14		287		—
With an allowance recorded:
Commercial real estate		1,631		—		4,346		—		1,533		91		6,092		5
Commercial business		312		—		2,739		—		584		9		2,746		3
Residential prime		11,077		—		9,650		—		10,226		119		9,380		7
Residential subprime		6,228		—		—		—		6,115		—		—		—
Home equity		7,177		5		7,244		—		7,404		40		7,458		14
Indirect automobile		1,544		—		1,349		—		1,720		27		1,610		22
Credit card		1,051		—		424		—		724		—		426		—
Other		470		—		372		—		489		11		446		4
Total	$	40,761	$	22	$	50,310	$	23	$	41,026	$	379	$	49,840	$	136
Total commercial loans		12,522		17		31,006		23		13,648		168		30,233		89
Total mortgage loans		17,305		—		9,650		—		16,341		119		9,380		7
Total consumer loans		10,934		5		9,654		—		11,037		92		10,227		40

33

As of September 30, 2014 and December 31, 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.

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 deposit 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 end during the fourth quarter of 2014 for all covered assets excluding single family residential assets and 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. 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 September 30, 2014, projected net losses indicate that a clawback payment is no longer probable. Accordingly, the reserve balance was reversed in the third quarter of 2014 through a reduction of expense in the Company’s statement of comprehensive income for the three and nine months ended September 30, 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.

34

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:

	Nine Months Ended
	September 30
(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		1,153			(58,565	)
Amortization		(61,393	)		(68,707	)
Submission of reimbursable losses to (recoveries payable to) the FDIC		4,901			(44,910	)
Impairment		(5,097	)		(31,813	)
Changes due to a change in cash flow assumptions on OREO and other changes		(7,164	)		(14,189	)
Balance at end of period	$	94,712		$	204,885

FDIC loss share receivables collectability assessment

The Company assesses the FDIC loss share receivables for collectability on a quarterly basis. Based on the collectability analysis completed for the nine months ended September 30, 2014, the Company concluded that the $94.7 million FDIC loss share receivable is fully collectible as of September 30, 2014. See below for discussion of the impairment charges recognized in 2014 and 2013.

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 collectability assessment completed for the three-months ended September 30, 2014, June 30, 2014 and March 31, 2013, 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.

On April 10, 2013, management concluded and the Board of Directors agreed that an impairment charge was required under generally accepted accounting principles applicable to the Company and should be recognized in the Company’s consolidated financial statements during the three-month period ended March 31, 2013. Therefore, the Company recognized a valuation allowance against the indemnification assets in the amount of $31.8 million through a charge to net income.

Management deemed an impairment charge necessary for the nine-month period ended September 30, 2014 for $5.1 million.

NOTE 9 –TRANSFERS AND SERVICING OF FINANCIAL ASSETS (INCLUDING MORTGAGE BANKING ACTIVITY)

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 government-sponsored enterprises (“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. The following table details the mortgage banking activity as of and for the nine months ended September 30:

(Dollars in thousands)	2014			2013
Balance at beginning of period	$	128,442		$	267,475
Originations and purchases		1,218,684			1,712,557
Sales, net of gains		(1,193,282	)		(1,871,747	)
Other		(5,314	)		—
Balance at end of period	$	148,530		$	108,285

35

(Dollars in thousands)	2014			2013
Fair value changes of derivatives and mortgage loans held for sale, net	$	(1,081	)	$	(270	)
Gains on sales		41,412			51,709
Servicing and other income, net		572			402
Total mortgage income	$	40,903		$	51,841

Mortgage Servicing Rights

Mortgage servicing rights 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 the periods indicated:

	September 30, 2014							December 31, 2013
	Gross Carrying		Accumulated			Net Carrying		Gross Carrying		Accumulated			Net Carrying
(Dollars in thousands)	Amount		Amortization			Amount		Amount		Amortization			Amount
Mortgage servicing rights	$	2,787	$	(1,020	)	$	1,767	$	2,146	$	(638	)	$	1,508

NOTE 10 – GOODWILL AND OTHER ACQUIRED INTANGIBLE ASSETS

Goodwill

Changes to the carrying amount of goodwill by reportable segment for the nine months ended September 30, 2014 and the year ended December 31, 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 period		123,995		—		375		124,370
Balance, September 30, 2014	$	497,900	$	23,178	$	5,164	$	526,242

The goodwill acquired during the nine months ended September 30, 2014 was a result of the Trust One-Memphis, Teche, First Private, and The Title Company LLC acquisitions. See Note 4 for further information. Allocation of the goodwill acquired during the nine months ended September 30, 2014 to reportable segments is preliminary and subject to change.

The Company performed the required annual goodwill impairment test as of October 1, 2013. 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 not become aware of any events or changes in circumstances that would indicate that goodwill might be impaired. The Company is currently in the process of performing its annual impairment tests as of October 1, 2014.

Title Plant

The Company held title plant assets totaling $6.7 million at both September 30, 2014 and December 31, 2013. No events or changes in circumstances occurred during 2014 or 2013 to suggest the carrying value of the title plant was not recoverable.

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Intangible assets subject to amortization

Definite-lived intangible assets had the following carrying values included in Other assets on the Company’s consolidated balance sheet as of the periods indicated:

	September 30, 2014							December 31, 2013
	Gross Carrying		Accumulated			Net Carrying		Gross Carrying		Accumulated			Net Carrying
(Dollars in thousands)	Amount		Amortization			Amount		Amount		Amortization			Amount
Core deposit intangibles	$	50,564	$	(34,564	)	$	16,000	$	45,406	$	(30,784	)	$	14,622
Customer relationship intangible asset		1,348		(777	)		571		1,348		(631	)		717
Non-compete agreement		163		(53	)		110		—		—			—
Other intangible assets		205		(29	)		176		—		—			—
Total	$	52,280	$	(35,423	)	$	16,857	$	46,754	$	(31,415	)	$	15,339

NOTE 11 – OTHER REAL ESTATE OWNED

Other real estate owned is included in Other assets on the Company’s consolidated balance sheet. Other real estate owned, segregated into non-covered and covered properties, consists of the following 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.

	September 30, 2014						December 31, 2013
(Dollars in thousands)	Non-covered		Covered(1)		Total		Non-covered		Covered		Total
Real estate owned acquired by foreclosure	$	18,627	$	30,991	$	49,618	$	28,072	$	60,474	$	88,546
Real estate acquired for development or resale		12,734		—		12,734		9,206		—		9,206
Other foreclosed property		63		971		1,034		93		1,328		1,421
Total	$	31,424	$	31,962	$	63,386	$	37,371	$	61,802	$	99,173

⁽¹⁾  Included in covered OREO at September 30, 2014 is $20.6 million that will lose loss share coverage within the next 12 months.

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NOTE 12 – DERIVATIVE INSTRUMENTS AND OTHER HEDGING ACTIVITIES

Information pertaining to outstanding derivative instruments is as follows:

(Dollars in thousands)	Balance Sheet		Asset Derivatives Fair Value				Balance Sheet		Liability Derivatives Fair Value
	Location		September 30, 2014		December 31, 2013		Location		September 30, 2014		December 31, 2013
Derivatives not designated as hedging instruments under ASC Topic 815:
Interest rate contracts		Other assets	$	11,839	$	10,621		Other liabilities	$	11,839	$	10,620
Forward sales contracts		Other assets		104		1,468		Other liabilities		2,215		287
Written and purchased options		Other assets		20,347		17,987		Other liabilities		15,786		15,828
Total derivatives not designated as hedging instruments under ASC Topic 815				32,290		30,076				29,840		26,735
Total			$	32,290	$	30,076			$	29,840	$	26,735
(Dollars in thousands)			Asset Derivatives Notional Amount						Liability Derivatives Notional Amount
			September 30, 2014		December 31, 2013				September 30, 2014		December 31, 2013
Derivatives not designated as hedging instruments under ASC Topic 815:
Interest rate contracts			$	421,523	$	380,303			$	421,523	$	380,303
Forward sales contracts				88,190		192,876				351,861		45,091
Written and purchased options				363,239		295,425				197,044		199,061
Total derivatives not designated as hedging instruments under ASC Topic 815				872,952		868,604				970,428		624,455
Total			$	872,952	$	868,604			$	970,428	$	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 September 30, 2014 and December 31, 2013, the Company was required to post $8.4 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 September 30, 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.

	September 30, 2014
(Dollars in thousands)	Gross Amounts		Gross Amounts Not Offset
	Presented in the		in the Balance Sheet
	Balance Sheet		Derivatives		Collateral (1)			Net
Derivatives subject to master netting arrangements
Derivative assets
Interest rate contracts designated as hedging instruments	$	—	$	—	$	—		$	—
Interest rate contracts not designated as hedging instruments		11,839		—		—			11,839
Written and purchased options		15,423		—		—			15,423
Total derivative assets subject to master netting arrangements	$	27,262	$	—	$	—		$	27,262
Derivative liabilities
Interest rate contracts designated as hedging instruments	$	—	$	—	$	—		$	—
Interest rate contracts not designated as hedging instruments		11,839		—		(3,892	)		7,947
Total derivative liabilities subject to master netting arrangements	$	11,839	$	—	$	(3,892	)	$	7,947

⁽¹⁾ Consists of cash collateral recorded at cost, which approximates fair value, and investment securities.

	December 31, 2013
(Dollars in thousands)	Gross Amounts		Gross Amounts Not Offset
	Presented in the		in the Balance Sheet
	Balance Sheet		Derivatives		Collateral (1)			Net
Derivatives subject to master netting arrangements
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 nine months ended September 30, 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.

38

At September 30, 2014, the fair value of derivatives that will mature within the next twelve months is $0.1 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.

39

At September 30, 2014 and 2013, and for the three and nine months 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 September 30					For the Three Months Ended September 30
Derivatives in ASC Topic 815 Cash
Flow Hedging Relationships	2014		2013			2014		2013			2014		2013
Interest rate contracts	$	—	$	—	Other income (expense)	$	—	$	—	Other income (expense)	$	—	$	—
Total	$	—	$	—		$	—	$	—		$	—	$	—

											Location of Gain (Loss)			Amount of Gain
											Recognized in Income on			(Loss) Recognized in
			Location of Gain			Amount of Gain					Derivative (Ineffective			Income on
Amount of Gain (Loss)			(Loss) Reclassified			(Loss) Reclassified					Portion and Amount			Derivative (Ineffective
Recognized in OCI net of taxes (Effective			from Accumulated OCI into Income			from Accumulated OCI into Income					Excluded from Effectiveness			Portion and Amount Excluded from
Portion)			(Effective Portion)			(Effective Portion)					Testing			Effectiveness Testing)
As of September 30						For the Nine Months Ended September 30
2014	2013					2014		2013						2014			2013
$                —	$	—		Other income (expense	)	$	—	$	(392	)		Other income (expense	)	$	(1	)	$	—
$                —	$	—				$	—	$	(392	)				$	(1	)	$	—

(Dollars in thousands)	Amount of Gain (Loss) Recognized in Income on Derivatives
Derivatives Not Designated as	Location of Gain (Loss)
Hedging Instruments under ASC	Recognized in Income on	For the Three Months Ended						For the Nine Months Ended
Topic 815	Derivatives	September 30						September 30
		2014			2013			2014			2013
Interest rate contracts	Other income (expense)	$	406		$	2,061			1,971			2,542
Forward sales contracts	Mortgage Income		(3,648	)		3,290			(7,512	)		897
Written and purchased options	Mortgage Income		773			(7,896	)		2,401			(3,820	)
Total		$	(2,469	)	$	(2,545	)	$	(3,140	)	$	(381	)

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NOTE 13 – 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 periods indicated:

	Three Months Ended
	September 30, 2014
	Before			Tax Expense		Net-of-Tax
(Dollars in thousands)	Tax			(Benefit)		Amount
Unrealized gain on securities:
Unrealized holding losses arising during the period	$	(7,032	)	$	2,461	$	(4,571	)
Less: reclassification adjustment for gains included in net income		(582	)		204		(378	)
Net unrealized losses		(7,614	)		2,665		(4,949	)
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	$	—		$	—	$	—
Less: reclassification adjustment for losses (gains) included in net income		—			—		—
Fair value of derivative instruments designated as cash flow hedges		—			—		—
Total other comprehensive loss	$	(7,614	)	$	2,665	$	(4,949	)

	Three Months Ended
	September 30, 2013
	Before		Tax Expense			Net-of-Tax
(Dollars in thousands)	Tax		(Benefit)			Amount
Unrealized gain on securities:
Unrealized holding gains arising during the period	$	5,528	$	(1,935	)	$	3,593
Less: reclassification adjustment for losses included in net income		3		(1	)		2
Net unrealized losses		5,531		(1,936	)		3,595
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	$	—	$	—		$	—
Less: reclassification adjustment for gains included in net income		—		—			—
Fair value of derivative instruments designated as cash flow hedges		—		—			—
Total other comprehensive income	$	5,531	$	(1,936	)	$	3,595

41

	Nine Months Ended
	September 30, 2014
	Before			Tax Expense			Net-of-Tax
(Dollars in thousands)	Tax			(Benefit)			Amount
Unrealized loss on securities:
Unrealized holding gains arising during the period	$	25,586		$	(8,955	)	$	16,631
Less: reclassification adjustment for gains included in net income		(609	)		213			(396	)
Net unrealized gains		24,977			(8,742	)		16,235
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	$	—		$	—		$	—
Less: reclassification adjustment for losses (gains) included in net income		—			—			—
Fair value of derivative instruments designated as cash flow hedges		—			—			—
Total other comprehensive income	$	24,977		$	(8,742	)	$	16,235
	Nine Months Ended
	September 30, 2013
	Before			Tax Expense			Net-of-Tax
(Dollars in thousands)	Tax			(Benefit)			Amount
Unrealized gain on securities:
Unrealized holding losses arising during the period	$	(38,769	)	$	13,569		$	(25,200	)
Less: reclassification adjustment for gains included in net income		(2,259	)		791			(1,468	)
Net unrealized losses		(41,028	)		14,360			(26,668	)
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	$	952		$	(333	)	$	619
Less: reclassification adjustment for losses included in net income		392			(137	)		255
Fair value of derivative instruments designated as cash flow hedges		1,344			(470	)		874
Total other comprehensive loss	$	(39,684	)	$	13,890		$	(25,794	)

NOTE 14 – 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 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 September 30, 2014 and December 31, 2013, that the Company and IBERIABANK met all capital adequacy requirements to which they are subject.

42

As of September 30, 2014, the most recent notification from the Federal Deposit Insurance Corporation 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 September 30, 2014 and December 31, 2013 are presented in the following table.

(Dollars in thousands)	September 30, 2014
	Minimum					Well Capitalized					Actual
	Amount		Ratio			Amount		Ratio			Amount		Ratio
Tier 1 Leverage
Consolidated	$	596,945		4.00	%	$	N/A		N/A	%	$	1,376,283		9.22	%
IBERIABANK		594,578		4.00			743,223		5.00			1,225,980		8.25
Tier 1 risk-based capital
Consolidated		490,391		4.00	%	$	N/A		N/A	%	$	1,376,283		11.23	%
IBERIABANK		489,049		4.00			733,574		6.00			1,225,980		10.03
Total risk-based capital
Consolidated		980,781		8.00	%	$	N/A		N/A	%	$	1,522,932		12.42	%
IBERIABANK		978,099		8.00			1,222,624		10.00			1,372,629		11.23

	December 31, 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

NOTE 15 – 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 nine months ended September 30, 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 September 30, 2014, future option or restricted stock awards of 1,040,092 shares could be made under approved incentive compensation plans.

43

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 three-month and nine-month periods ended September 30:

	For the Three Months Ended				For the Nine Months Ended
	September 30				September 30
(Dollars in thousands, except per share data)	2014		2013		2014		2013
Compensation expense related to stock options	$	508	$	526	$	1,545	$	1,592
Income tax benefit related to stock options		178		184		541		557
Impact on basic earnings per share		0.01		0.01		0.03		0.03
Impact on diluted earnings per share		0.01		0.01		0.03		0.03

The Company reported $1.2 million and $0.5 million of excess tax benefits as financing cash inflows during the nine months ended September 30, 2014 and 2013, respectively, related to the exercise and vesting of stock options. Net cash proceeds from the exercise of stock options were $11.1 million and $5.4 million for the nine months ended September 30, 2014 and 2013, respectively.

The Company uses the Black-Scholes option pricing model to estimate the fair value of share-based awards. The following weighted-average assumptions were used for option awards outstanding during the nine-month periods ended September 30:

	2014			2013
Expected dividends		2.1	%		2.6	%
Expected volatility		35.8	%		34.8	%
Risk-free interest rate		2.3	%		1.7	%
Expected term (in years)		7.5			8.6
Weighted-average grant-date fair value	$	21.25		$	15.37

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 September 30, 2014, there was $3.7 million of unrecognized compensation cost related to stock options that is expected to be recognized over a weighted-average period of 5.2 years.

The following table represents the activity related to stock options during the periods indicated.

				Weighted Average		Weighted Average
	Number of shares			Exercise Price		Remaining Contract Life
Outstanding options, December 31, 2012		1,236,075		$	51.48
Granted		75,722			52.36
Exercised		(142,841	)		38.09
Forfeited or expired		(36,608	)		56.01
Outstanding options, September 30, 2013		1,132,348		$	53.09		4.7 Years
Exercisable options, September 30, 2013		749,545			52.94		3.2 Years
Outstanding options, December 31, 2013		1,072,829		$	53.47
Granted		77,098			65.30
Exercised		(234,363	)		48.36
Forfeited or expired		(13,446	)		60.82
Outstanding options, September 30, 2014		902,118		$	55.70		5.2 Years
Exercisable options, September 30, 2014		581,423			55.65		3.8 Years

At September 30, 2014, the aggregate intrinsic value of shares underlying outstanding stock options and underlying exercisable stock options was $6.8 million and $4.4 million, respectively. Total intrinsic value of options exercised was $4.1 million and $1.9 million for the nine months ended September 30, 2014 and 2013, respectively.

44

Restricted stock awards

The Company issues restricted stock under various plans for certain officers and directors. A supplemental stock benefit plan adopted in 1999 and the 2001, 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 September 30, 2014 and 2013, unearned share-based compensation associated with these awards totaled $22.2 million and $23.3 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 Three Months Ended September 30				For the Nine Months Ended September 30
(Dollars in thousands)	2014		2013		2014		2013
Compensation expense related to restricted stock	$	2,497	$	2,212	$	7,382	$	6,407

The following table represents unvested restricted stock award activity for the nine months ended September 30:

	2014			2013
Balance at beginning of period		523,756			538,202
Granted		146,547			166,223
Forfeited		(18,171	)		(27,483	)
Earned and issued		(152,112	)		(136,629	)
Balance at end of period		500,020			540,313

Phantom stock awards

As part of the IBKC Phantom Award Plan and 2009 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 the end of the periods indicated and the current market price of the Company’s stock at that time.

	For the Three Months Ended September 30				For the Nine Months Ended September 30
(Dollars in thousands)	2014		2013		2014		2013
Compensation expense related to phantom stock	$	619	$	792	$	3,692	$	2,602

45

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, 2012		318,729			16,035			334,764		$	16,444,000
Granted		166,664			8,793			175,457			9,108,000
Forfeited share equivalents		(16,381	)		(681	)		(17,062	)		(886,000	)
Vested share equivalents		(45,065	)		(3,327	)		(48,392	)		(2,453,000	)
Balance, September 30, 2013		423,947			20,820			444,767		$	23,088,000
Balance, December 31, 2013		417,238			22,351			439,589		$	27,628,000
Granted		115,620			7,147			122,767			7,674,000
Forfeited share equivalents		(19,498	)		(1,751	)		(21,249	)		(1,328,000	)
Vested share equivalents		(68,480	)		(6,615	)		(75,095	)		(5,002,000	)
Balance, September 30, 2014		444,880			21,132			466,012		$	29,130,000

⁽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 $62.51 and $51.91 on September 30, 2014 and 2013, respectively.

NOTE 16 – 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 to extend credit and standby letters of credit. 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 other parties represents the contractual amount of the financial instruments. At September 30, 2014, and December 31, 2013, the fair value of guarantees under commercial and standby letters of credit was $1.3 million and $1.1 million, respectively. This amount represents the unamortized fee associated with these guarantees and is included in 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 September 30, 2014 and December 31, 2013, the Company had the following financial instruments outstanding, whose contract amounts represent credit risk:

(Dollars in thousands)	September 30 2014		December 31 2013
Commitments to grant loans	$	242,137	$	221,627
Unfunded commitments under lines of credit		3,834,107		3,326,448
Commercial and standby letters of credit		131,347		105,026
Reserve for unfunded lending commitments		12,099		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.

46

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.

NOTE 17 – 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 has 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:

	September 30, 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	$	148,530	$	142,381	$	6,149	$	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 three-month period ended September 30, 2014 totaled $1.6 million, while net gains resulting from the change in fair value of these loans were $4.0 million for the nine-month period ended September 30, 2014. There were no net gains or losses recorded in mortgage income for the corresponding periods ended September 30, 2013 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.

47

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)	September 30, 2014
	(Level 1)		(Level 2)		(Level 3)		Total
Assets
Available for sale securities	$	46,261	$	2,057,567	$	—	$	2,103,828
Mortgage loans held for sale		—		148,530		—		148,530
Derivative instruments		—		32,290		—		32,290
Total	$	46,261	$	2,238,387	$	—	$	2,284,648
Liabilities
Derivative instruments		—		29,840		—		29,840
Total	$	—	$	29,840	$	—	$	29,840
	December 31, 2013
	(Level 1)		(Level 2)		(Level 3)		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

Available for sale securities with a market value of $14.7 million at September 30, 2014 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 changes in net assets) 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 (or changes in net assets)	$	(1,697	)	$	—
Change in unrealized gains (losses) relating to assets still held at September 30, 2014		—			16,235

48

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)	September 30, 2014
	(Level 1)		(Level 2)		(Level 3)		Total
Assets
Loans	$	—	$	1,086	$	—	$	1,086
OREO		—		6,974		—		6,974
Total	$	—	$	8,060	$	—	$	8,060
(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).

In accordance with the provisions of ASC Topic 310-30, the Company records certain loans considered impaired at their estimated fair value. A loan is considered impaired if it is probable the Company will be unable to collect all amounts due according to the contractual terms of the loan agreement. Fair value is measured at the estimated fair value of the collateral for collateral-dependent loans. Impaired non-covered loans with an outstanding balance of $1.1 million and $4.1 million were recorded at their fair value at September 30, 2014 and December 31, 2013, respectively. These loans include a reserve of $25 thousand and $1.0 million included in the Company’s allowance for credit losses at September 30, 2014 and December 31, 2013, respectively.

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 statement of comprehensive income for the nine months ended September 30, 2014 and the year ended December 31, 2013. After the impairment losses, the carrying value of the closed branches was $3.1 million and $5.1 million at September 30, 2014 and December 31, 2013, respectively, and is included in OREO (as real estate acquired for development or resale) on the Company’s consolidated balance sheet.

The Company did not record any liabilities at fair value for which measurement of the fair value was made on a nonrecurring basis at September 30, 2014 and December 31, 2013.

NOTE 18 – 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 financial statements for the methods and assumptions used to measure the fair value of investment securities and derivative instruments.

49

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 receivable 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 September 30, 2014 and December 31, 2013, weighted for varying maturity dates. Other non-covered loans receivable are valued based on present values using entry-value interest rates at September 30, 2014 and December 31, 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 September 30, 2014 and December 31, 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 September 30, 2014 and December 31, 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:

	September 30, 2014				December 31, 2013
	Carrying		Fair		Carrying		Fair
(Dollars in thousands)	Amount		Value		Amount		Value
Financial Assets
Cash and cash equivalents	$	668,007	$	668,007	$	391,396	$	391,396
Investment securities		2,224,348		2,226,286		2,090,906		2,089,363
Loans and loans held for sale		11,227,729		11,247,080		9,620,461		9,724,432
FDIC loss share receivable		94,712		27,922		162,312		21,918
Derivative instruments		32,290		32,290		30,076		30,076
Accrued interest receivable		37,143		37,143		32,143		32,143
Financial Liabilities
Deposits	$	12,377,775	$	11,986,233	$	10,737,000	$	10,226,573
Short-term borrowings		812,783		812,783		680,344		680,344
Long-term debt		355,569		324,282		280,699		235,503
Derivative instruments		29,840		29,840		26,735		26,735
Accrued interest payable		7,972		7,972		6,102		6,102

50

The fair value estimates presented herein are based upon pertinent information available to management as of September 30, 2014 and December 31, 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 19 – 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.

	Three Months Ended September 30, 2014
(Dollars in thousands)	IBERIABANK			IMC			LTC			Consolidated
Interest income	$	131,362		$	1,804		$	1		$	133,167
Interest expense		11,501			625			—			12,126
Net interest income		119,861			1,179			1			121,041
Provision for loan losses		5,621			93			—			5,714
Mortgage income		(5	)		12,819			—			12,814
Title income		—			—			5,577			5,577
Other non-interest income		27,311			(37	)		(2	)		27,272
Core deposit intangible amortization		1,429			—			—			1,429
Allocated expenses		(2,386	)		1,697			689			—
Other non-interest expenses		102,692			11,624			4,315			118,631
Income before income taxes		39,811			547			572			40,930
Income tax expense		10,739			217			230			11,186
Net income	$	29,072		$	330		$	342		$	29,744
Total loans and loans held for sale	$	11,055,809		$	171,920		$	—		$	11,227,729
Total assets		15,288,157			202,923			25,529			15,516,609
Total deposits		12,371,606			6,169			—			12,377,775
Average assets		15,239,174			213,936			25,296			15,478,406

51

	Three Months Ended September 30, 2013
(Dollars in thousands)	IBERIABANK			IMC		LTC		Consolidated
Interest income	$	107,051		$	1,459	$	2	$	108,512
Interest expense		10,731			329		—		11,060
Net interest income		96,320			1,130		2		97,452
Provision for loan losses		1,868			146		—		2,014
Mortgage income		5			15,197		—		15,202
Title income		—			—		5,482		5,482
Other non-interest income		22,579			—		—		22,579
Core deposit intangible amortization		1,125			—		—		1,125
Allocated expenses		(2,658	)		1,933		725		—
Other non-interest expenses		90,858			12,016		4,153		107,027
Income before income taxes		27,711			2,232		606		30,549
Income tax expense		6,228			877		252		7,357
Net income	$	21,483		$	1,355	$	354	$	23,192
Total loans and loans held for sale	$	9,024,959		$	126,363	$	—	$	9,151,322
Total assets		12,965,373			153,402		26,302		13,145,077
Total deposits		10,946,453			4,311		—		10,950,764
Average assets		12,761,165			157,144		26,126		12,944,435

	Nine Months Ended September 30, 2014
(Dollars in thousands)	IBERIABANK			IMC			LTC			Consolidated
Interest income	$	362,054		$	4,563		$	2		$	366,619
Interest expense		30,869			1,323			—			32,192
Net interest income		331,185			3,240			2			334,427
Provision for loan losses		12,481			84			—			12,565
Mortgage income		80			40,823			—			40,903
Title income		—			—			15,007			15,007
Other non-interest income		73,460			(61	)		(2	)		73,397
Core deposit intangible amortization		3,779			—			—			3,779
Allocated expenses		(9,110	)		6,432			2,678			—
Other non-interest expenses		305,121			33,558			12,405			351,084
Income (loss) before income taxes		92,454			3,928			(76	)		96,306
Income tax expense (benefit)		24,081			1,552			(14	)		25,619
Net income (loss)	$	68,373		$	2,376		$	(62	)	$	70,687
Total loans and loans held for sale	$	11,055,809		$	171,920		$	—		$	11,227,729
Total assets		15,288,157			202,923			25,529			15,516,609
Total deposits		12,371,606			6,169			—			12,377,775
Average assets		14,097,930			179,218			25,003			14,302,151

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	Nine Months Ended September 30, 2013
(Dollars in thousands)	IBERIABANK			IMC			LTC		Consolidated
Interest income	$	318,646		$	4,428		$	31	$	323,105
Interest expense		34,786			1,513			—		36,299
Net interest income		283,860			2,915			31		286,806
Provision for loan losses		320			125			—		445
Mortgage income		2			51,839			—		51,841
Title income		—			—			16,199		16,199
Other non-interest income		62,206			(4	)		—		62,202
Core deposit intangible amortization		3,375			—			—		3,375
Allocated expenses		(4,402	)		3,213			1,189		—
Other non-interest expenses		315,332			38,942			12,761		367,035
Income before income taxes		31,443			12,470			2,280		46,193
Income tax expense (benefit)		884			4,897			913		6,694
Net income	$	30,559		$	7,573		$	1,367	$	39,499
Total loans and loans held for sale	$	9,024,959		$	126,363		$	—	$	9,151,322
Total assets		12,965,373			153,402			26,302		13,145,077
Total deposits		10,946,453			4,311			—		10,950,764
Average assets		12,747,602			193,463			25,454		12,966,519

NOTE 20 – SUBSEQUENT EVENTS

Acquisition of Florida Bank Group, Inc.

During the forth 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 and is expected to close in the first quarter of 2015, subject to customary closing conditions, including the receipt of required regulatory approvals and the approval of Florida Bank Group’s shareholders.

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, subject to certain market price adjustments provided for in the agreement. 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 and is expected to close in the first quarter of 2015, subject to customary closing conditions, including the receipt of required regulatory approvals and the approval of Old Florida’s shareholders.

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.

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Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion and analysis is intended to assist readers in understanding the consolidated financial condition and results of operations of IBERIABANK Corporation and its wholly owned subsidiaries (collectively, the “Company”) as of September 30, 2014 and updates the Form 10-K for the year ended December 31, 2013. This discussion should be read in conjunction with the unaudited consolidated financial statements, accompanying footnotes and supplemental financial data included herein. The emphasis of this discussion will be amounts as of September 30, 2014 compared to December 31, 2013 for the balance sheets and the three months and nine months ended September 30, 2014 compared to the same periods ended September 30, 2013 for the statements of comprehensive income. Certain amounts in prior year presentations have been reclassified to conform to the current year presentation, except as otherwise noted.

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 three descriptions of loans that are used to categorize its loan portfolio into distinct components based on common characteristics and relevant accounting treatment. “Acquired loans” refer to all loans acquired in a business combination. Because of the loss protection provided by the Federal Deposit Insurance Corporation (the “FDIC”), the risks of the loans and foreclosed real estate acquired in the CapitalSouth Bank (“CSB”), Orion Bank (“Orion”), Century Bank (“Century”), and Sterling Bank (“Sterling”) acquisitions, excluding consumer loans acquired from Sterling, are significantly different from those assets not similarly covered by loss share agreements. Accordingly, the Company reports loans subject to the loss share agreements as “covered loans” and loans that are not subject to the loss share agreements as “non-covered loans.” The subset of acquired loans that is not subject to loss share agreements are referred to as “non-covered acquired loans.” Loans that are neither subject to loss share agreements nor acquired in a business combination are referred to as “legacy loans” or “organic loans.”

EXECUTIVE OVERVIEW

The Company offers commercial and retail banking products and services to customers in locations in six states through its subsidiary, IBERIABANK. The Company also operates mortgage production offices in 12 states through IBERIABANK’s subsidiary, IBERIABANK Mortgage Company (“IMC”), and offers a full line of title insurance and closing services throughout Arkansas and Louisiana through Lenders Title Company (“LTC”) and its subsidiaries. IBERIA Capital Partners L.L.C. (“ICP”) provides equity research, institutional sales and trading, and corporate finance services. 1887 Leasing, LLC and IB Aircraft Holdings, LLC own aircraft used by management of the Company and its subsidiaries. IBERIA Asset Management, Inc. (“IAM”) provides wealth management and trust services for commercial and private banking clients. IBERIA CDE, L.L.C. (“CDE”) is engaged in the purchase of tax credits.

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The Company’s focus is a continued increase in shareholder value, and management believes that improvement in core earnings drives increased shareholder value. 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 2013, the Company reviewed its long-term financial and strategic goals in light of changes affecting the banking industry, including evolving economic conditions, a change in regulatory environment, and interest rate fluctuations. The Company strives to improve long-term shareholder returns by setting challenging financial goals and executing to achieve these goals in consideration of the current and anticipated operating and regulatory environment. We are shareholder- and client-focused, expect high performance from our employees, believe in a strong sense of community and strive to make the Company a great place to work.

During 2014, the Company continued to execute its business model successfully, as evidenced by solid organic loan growth thus far, despite the challenges of the current operating environment, which include regulatory developments, increased competition, enhanced regulatory scrutiny on the financial industry and continued interest rate pressure. The Company also continued to develop its non-interest revenue streams, particularly from its wealth management and mortgage production subsidiaries. In 2013, the Company also focused on improving its short- and long-term profitability through a number of cost saving initiatives implemented throughout the year and into 2014. As a result of its efforts, the Company believes it remains well positioned for future growth opportunities, as evidenced by the strength in its liquidity, core funding, and capitalization levels.

Thus far in 2014, the Company continued to experience growth in many income statement and balance sheet metrics, including net interest income, net income, loans, deposits, and shareholders’ equity. For the first three quarters of 2014, net interest income increased $47.6 million, or 16.6%, while non-interest income decreased $0.9 million, or 0.7%, from the same nine-month period of 2013. Non-covered loans grew by $1.8 billion, or 20.3%, during the first nine months of 2014 to $10.6 billion at September 30, 2014, partially a result of acquired loans of $1.1 billion, while covered loans decreased by $195.6 million, or 27.2%. The mix of deposits continued a shift to non-interest-bearing, which represented 25.5% of total deposits at September 30, 2014, up from 24.0% at December 31, 2013. In 2014, the Company believes its liquidity, both on balance sheet and off balance sheet, continued to be favorable. The Company had cash of $668.0 million at September 30, 2014, and the Company has funding availability from the Federal Home Loan Bank (the “FHLB”) and correspondent bank lines to continue to meet cash flow needs. Additionally, its capital ratios were in excess of “well capitalized” from a regulatory perspective and its primary risk measures remained favorable. All of these factors allow the Company to maintain its strategic positioning within the challenging banking environment, provide a strong base from which to continue to grow its balance sheet, and remain positioned to provide currently anticipated increases in shareholder value throughout 2014 and into 2015.

Non-interest income decreased $0.9 million, or 0.7%, to $129.3 million for the first nine months of 2014, as the Company’s mortgage origination and title businesses both had a slowdown in activity. Mortgage sales volume decreased 35.8% from the nine-month period of 2013, which led to a $10.9 million decrease in mortgage income. Title income was $15.0 million, down 7.4% when compared to 2013. However, non-interest income from the Company’s investment in its trust and wealth management businesses continued to increase, as brokerage commissions increased $3.5 million, or 30.6%, over the first nine months of 2013. The Company’s additional customers and increased activity led to a $4.0 million, or 18.7%, increase in deposit service charges and a $1.7 million, or 23.9%, increase in ATM and debit card income over the same period.

In the first three quarters of 2014, non-interest expense decreased 4.2% from the same period of 2013. On a basis consistent with generally accepted accounting principles (“GAAP”), non-interest expenses for the nine months ended September 30, 2014 were $354.9 million, $15.5 million lower than the first three quarters of 2013. The largest component of the decrease was a $26.7 million decrease in impairment of the Company’s FDIC loss share receivables recorded between the two periods. In addition to the impairment, the Company incurred $2.3 million in debt prepayment penalties that also contributed to the higher non-interest expenses in 2013. Non-interest expense, excluding the impairment and other non-operating items (“non-GAAP”, see table 2 below) totaled $329.5 million thus far in 2014, an increase of $3.4 million, or 1.0%, versus the prior year. The increase in operating non-interest expense was a result of higher employee-related and other expenses as the Company expands its businesses through acquisitions and organic growth.

The provision for loan losses increased $12.1 million during the first nine months of 2014 when compared to the same 2013 period, due primarily to organic loan growth during the period, but was partially offset by an improvement in asset quality in the legacy portfolio over the past 12 months.

Net income available to common shareholders for the nine months ended September 30, 2014 increased $31.2 million to $2.25 per diluted share. Operating earnings (non-GAAP) for the first three quarters of 2014 increased $18.4 million to $85.2 million, or $2.71 on a per share basis.

Acquisition Activity

Over the past 14 years, the Company’s growth has included growth from targeted acquisitions that the Company determined would provide additional value to existing shareholders and be a strong strategic fit with the Company.

In the first quarter of 2014, the Company completed the acquisition of the Memphis, Tennessee operations of Trust One Bank, a division of Synovus Bank (“Trust One-Memphis”), which expanded the Company’s presence in the Memphis market. During the third quarter of

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2014, the Company also completed the acquisitions of Teche Holding Company (“Teche”) and its subsidiary bank, Teche Federal Bank, based in New Iberia, Louisiana, and First Private Holdings, Inc. (“First Private”), the holding company of Dallas, Texas-based First Private Bank of Texas. The Teche acquisition expanded the Company’s presence in the Acadiana region of Louisiana through the acquisition of 20 branches in the area, while the First Private acquisitions expanded the Company’s presence into the Dallas, Texas market.

A summary of the major categories of assets acquired and liabilities assumed (all recorded at preliminary fair value at the time of acquisition), as well as the goodwill created, in the three acquisitions is shown in the following table.

TABLE 1 – SUMMARY OF CURRENT PERIOD ACQUISITIONS ⁽¹⁾

(Dollars in thousands)
	Trust One - Memphis		Teche		First Private		Total
Assets
Cash	$	92,060	$	71,611	$	26,621	$	190,292
Investment securities		—		25,169		19,217		44,386
Loans		86,453		699,560		294,826		1,080,839
Other real estate owned		1,325		176		—		1,501
Core deposit intangible		2,597		2,055		506		5,158
Goodwill		8,596		84,786		30,611		123,993
Other assets		368		58,885		5,882		65,135
Total assets	$	191,399	$	942,242	$	377,663	$	1,511,304
Liabilities
Non-interest-bearing deposits	$	26,373	$	118,256	$	50,333	$	194,962
Interest-bearing deposits		164,942		521,348		261,933		948,223
Borrowings		—		140,532		6,451		146,983
Other liabilities		84		5,366		306		5,756
Total liabilities	$	191,399	$	785,502	$	319,023	$	1,295,924

⁽¹⁾  Assets and liabilities in this table were recorded at fair value at the time of acquisition. Fair values are preliminary and subject to change. See Note 4 of the unaudited consolidated financial statements for additional information.

In addition, during the first nine months of 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 added $0.8 million in total assets, primarily from goodwill recognized in the transactions and additional intangible assets.

During the fourth quarter of 2014, the Company also announced two additional acquisitions that are expected to close in 2015. The Company announced the signing of a definitive agreement to acquire Florida Bank Group, Inc. (“Florida Bank Group”), which will expand the Company’s presence in south Florida and extend it into Tallahassee and Jacksonville, Florida.

The Company also signed a definitive agreement to acquire Old Florida Bancshares, Inc. (“Old Florida”), which will expand the Company’s presence into Orlando, Florida.

Both the Florida Bank Group and Old Florida acquisitions are subject to customary closing conditions, including the receipt of required regulatory approvals and the approval of the acquired companies’ shareholders.

The Company believes these acquisitions, as well as a continued focus on high quality organic growth, improvements in efficiency, and development of fee-based businesses, will allow the Company to achieve its long-term objectives throughout 2014 and continue to improve long-term shareholder value.

FINANCIAL OVERVIEW

The Company’s net income for the third quarter of 2014 totaled $29.7 million, or $0.89 per diluted share, compared to $23.2 million, or $0.78 per diluted share, for the same three-month period of 2013. On an operating basis (non-GAAP), per share earnings were $1.00 per share, up $0.17 from the $0.83 in operating earnings per share in 2013. On a year-to-date basis, net income of $70.7 million, or $2.25 per diluted share, was $31.2 million higher than the nine-month period ended September 30, 2013. Primary drivers of the increase in earnings over the prior year include earning asset growth (both organic and through acquisitions) and a decrease in interest expenses. Key components of the Company’s performance during the third quarter and first nine months of 2014 are summarized below.

• Net interest income increased $23.6 million, or 24.2%, in the third quarter of 2014 when compared to 2013, and $47.6 million, or 16.6%, on a year-to-date basis. The quarter-to-date increase was attributable to a $24.7 million increase in interest income and a

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$1.1 million, or 9.6%, increase in interest expense. Compared to the third quarter of 2013, the Company’s net interest margin on a tax-equivalent basis increased to 3.47% from 3.37% due to changes in the volume and mix of the Company’s assets and liabilities as well as deposit rate decreases driven by repricing opportunities over the past 12 months. Similarly, year-to-date interest income increased $43.5 million, or 13.5%, while interest expense decreased $4.1 million, or 11.3%. Interest income was positively affected by a $1.2 billion increase in year-to-date average earning assets since September 30, 2013. The net loan yield, however, decreased 4 basis points and was negatively impacted by a 50 basis point decrease in the net covered loan yield driven by additional amortization on the loss share receivables.

• Non-interest income totaled $45.7 million in the third quarter of 2014, an increase of $2.4 million, or 5.5%, when compared to the third quarter of 2013. For the first nine months of 2014, non-interest income decreased 0.7%, or $0.9 million. However, the Company had an increase of $4.0 million in service charges, as well as a $3.5 million increase in broker commissions that partially offset the $10.9 million mortgage income decrease between the two periods. Also positively affecting non-interest income during the first nine months of 2014 was a $1.7 million increase in income from bank-owned life insurance, the result of additional income received from the payment of two life insurance policies in the current period.

• Non-interest expense for the first nine months of 2014 decreased $15.5 million from the same period of 2013 and was attributable primarily to the $31.8 million impairment charge recorded during the first quarter of 2013. For the third quarter of 2014, non-interest expenses were $11.9 million higher than the third quarter of 2013, primarily a result of $2.3 million increase in merger-related and severance expenses, impairment of the Company’s FDIC loss share receivable of $4.8 million, and a $3.4 million increase in operating expenses due primarily to acquisition growth.

• The Company recorded a provision for loan losses of $12.6 million thus far in 2014 (including $5.7 million in the third quarter of 2014), $12.1 million above the provision recorded in the first three quarters of 2013. The provision in 2014 was impacted by loan growth during the period, but was tempered by an overall improvement in the Company’s asset quality, especially in its non-covered, non-acquired loan portfolio. The improvement in asset quality from December 31, 2013 has partially offset the need for a higher allowance for loan losses as a result of loan growth thus far in 2014. As of September 30, 2014, the allowance for loan losses as a percent of total loans was 1.21%, compared to 1.51% at December 31, 2013, and was 68.8% of non-performing loans at September 30, 2014, compared to 52.5% at the end of 2013.

• The Company paid a quarterly cash dividend of $0.34 per common share in the third quarter of 2014 and $1.02 for the year-to-date period. These per share amounts were consistent with the quarterly and year-to-date dividends paid for the same periods in 2013.

• Total assets at September 30, 2014 were $15.5 billion, up $2.2 billion, or 16.1%, from December 31, 2013. Acquired assets of $1.5 billion and legacy loan growth of $891.6 million, or 10.8%, across many of the Company’s markets drove the increase in total assets. A $195.6 million decrease in covered loans since the end of 2013 partially offset these increases. The Company’s FDIC loss share receivables also decreased $67.6 million, or 41.6%, since December 31, 2013, due primarily to amortization and impairments.

• Total loans at September 30, 2014 were $11.1 billion, an increase of $1.6 billion, or 16.7%, from $9.5 billion at December 31, 2013. As noted above, loan growth during the first nine months of 2014 was driven by a 20.3% increase in non-covered loans. Of the $1.8 billion in non-covered loan growth, the Company acquired $1.1 billion in loans from Teche, First Private, and Trust One-Memphis, and had legacy loan growth of $891.6 million. Covered loans decreased 27.2% from December 31, 2013, as covered loans were paid down or charged-off and submitted for reimbursement.

• Total customer deposits increased $1.6 billion, or 15.3%, to $12.4 billion at September 30, 2014. The Company acquired $1.1 billion in total deposits from Teche, First Private, and Trust One-Memphis, and had net deposit growth of $497.6 million excluding these acquired deposits thus far in 2014. Non-interest-bearing deposits increased $581.5 million, or 22.6%, while interest-bearing deposits increased $1.1 billion, or 13.0%. Excluding acquired deposits, the Company’s non-interest-bearing deposits increased $386.6 million while interest-bearing deposits increased $111.0 million. Although deposit competition remained intense, the Company was able to generate growth across many of its deposit products. Organic deposit growth was driven by growth in the Company’s Houston, Texas, Little Rock, Arkansas, Birmingham, Alabama, and Dallas, Texas markets.

• Shareholders’ equity increased $286.6 million, or 18.7%, 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 $214.7 million, as well as undistributed net income of $37.7 million and a $16.2 million increase in other comprehensive income, a result of the change in the unrealized gain in the Company’s available for sale investment portfolio at the end of the third quarter of 2014.

The discussion and analysis below 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, distort period-to-period comparisons. Since the presentation of these GAAP

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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.

TABLE 2 - RECONCILIATIONS OF NON-GAAP FINANCIAL MEASURES

	Three Months Ended September 30
	2014									2013
(Dollars in thousands, except per share amounts)	Pre-tax			After-tax			Per share (1)			Pre-tax			After-tax			Per share (1)
Net income (loss) (GAAP)	$	40,930		$	29,744		$	0.89		$	30,549		$	23,192		$	0.78
Non-interest expense adjustments
Merger-related expenses		1,752			1,139			0.04			85			55			0.00
Severance expenses		1,226			797			0.02			554			360			0.00
(Gain) Loss on sale of long-lived assets, net of impairment		4,213			2,738			0.08			977			635			0.01
(Reversal of) Provision for FDIC clawback liability		(797	)		(518	)		(0.02	)		667			434			0.02
Other non-operating non-interest expense		1			1			0.00			(36	)		(23	)		0.01
Non-interest income adjustments
Gain on sale of investments and other non-interest income		(582	)		(378	)		(0.01	)		(13	)		(8	)		0.00
Operating earnings (non-GAAP)		46,743			33,523			1.00			32,783			24,645			0.83
(Reversal of) Provision for covered and acquired loan losses		1,692			1,100			0.03			(854	)		(555	)		(0.02	)
Other provision for loan losses		4,022			2,614			0.08			2,868			1,864			0.07
Pre-provision operating earnings (non-GAAP)	$	52,457		$	37,237		$	1.11		$	34,797		$	25,954		$	0.89

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

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	Nine Months Ended September 30
	2014									2013
(Dollars in thousands, except per share amounts)	Pre-tax			After-tax			Per share (1)			Pre-tax			After-tax			Per share (1)
Net income (loss) (GAAP)	$	96,306		$	70,687		$	2.25		$	46,193		$	39,499		$	1.33
Non-interest expense adjustments
Merger-related expenses		13,138			8,608			0.27			217			141			0.00
Severance expenses		6,812			4,427			0.14			2,321			1,509			0.05
Gain (Loss) on sale of long-lived assets, net of impairment		5,994			3,896			0.12			37,408			24,315			0.82
(Reversal of) Provision for FDIC clawback liability		(797	)		(518	)		(0.02	)		797			518			0.02
Debt prepayment		—			—			—			2,307			1,500			0.05
Other non-operating non-interest expense		198			129			0.01			1,246			810			0.04
Non-interest income adjustments
Gain on sale of investments and other non-interest income		(2,382	)		(2,076	)		(0.06	)		(2,315	)		(1,505	)		(0.05	)
Operating earnings (non-GAAP)		119,269			85,153			2.71			88,174			66,787			2.27
(Reversal of) Provision for covered and acquired loan losses		3,544			2,304			0.07			(2,439	)		(1,585	)		(0.05	)
Other provision for loan losses		9,021			5,863			0.19			2,884			1,874			0.60
Pre-provision operating earnings (non-GAAP)	$	131,834		$	93,320		$	2.97		$	88,619		$	67,076		$	2.28

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

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	As of and For the Three Months Ended September 30
(Dollars in thousands)	2014			2013
Net interest income (GAAP)	$	121,041		$	97,452
Add: Effect of tax benefit on interest income		2,134			2,321
Net interest income (TE) (Non-GAAP)	$	123,175		$	99,773
Non-interest income (GAAP)	$	45,663		$	43,263
Add: Effect of tax benefit on non-interest income		564			489
Non-interest income (TE) (Non-GAAP)	$	46,227		$	43,752
Non-interest expense (GAAP)	$	120,060		$	108,152
Less: Intangible amortization expense		(1,493	)		(1,179	)
Tangible non-interest expense (Non-GAAP)	$	118,567		$	106,973
Net income (GAAP)	$	29,744		$	23,192
Add: Effect of intangible amortization, net of tax		970			766
Cash earnings (Non-GAAP)	$	30,714		$	23,958
Total assets (GAAP)	$	15,516,609		$	13,145,077
Less: Intangible assets		551,611			426,385
Total tangible assets (Non-GAAP)	$	14,964,998		$	12,718,692
Average assets (Non-GAAP)	$	15,478,406		$	12,944,435
Less: Average intangible assets		550,937			426,998
Total average tangible assets (Non-GAAP)	$	14,927,469		$	12,517,437
Total shareholders’ equity (GAAP)	$	1,817,548		$	1,525,268
Less: intangible assets		551,611			426,385
Total tangible shareholders’ equity (Non-GAAP)	$	1,265,937		$	1,098,883
Average shareholders’ equity (Non-GAAP)	$	1,808,719		$	1,514,155
Less: Average intangible assets		550,937			426,998
Average tangible shareholders’ equity (Non-GAAP)	$	1,257,782		$	1,087,157
Net income per common share - diluted	$	0.89		$	0.78
Add: Effect of intangible amortization, net of tax		0.03			0.03
Cash earnings per share - diluted (Non-GAAP)	$	0.92		$	0.81
Return on average common equity		6.52	%		6.08	%
Add: Effect of intangibles		3.16			2.66
Return on average tangible common equity (Non-GAAP)		9.68	%		8.74	%
Efficiency ratio		72.0	%		76.9	%
Less: Effect of tax benefit related to tax-exempt income		(1.1	)		(1.5	)
Efficiency ratio (TE) (Non-GAAP)		70.9			75.4
Less: Effect of amortization of intangibles		(0.9	)		(0.9	)
Tangible efficiency ratio (TE) (Non-GAAP)		70.0	%		74.5	%

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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. Earning assets averaged $14.0 billion during the third quarter of 2014, a $2.3 billion, or 19.8%, increase when compared to the third quarter of 2013. On a year-to-date basis, average earnings assets increased 10.6%, or $1.2 billion. The increase from the prior year was primarily the result of the Company’s three acquisitions in 2014 and organic loan and investment security growth during the past twelve months. The following discussion highlights the Company’s major categories of earning assets.

Loans and Leases

The Company’s total loan portfolio increased $1.6 billion, or 16.7%, to $11.1 billion at September 30, 2014, compared to $9.5 billion at December 31, 2013. The increase was driven by non-covered loan growth of $1.8 billion, or 20.3%, during the first nine months of 2014, but was offset by a $195.6 million, or 27.2%, decrease in covered loans. By loan type, the increase was primarily from commercial loan growth of $643.5 million and consumer loan growth of $460.3 million thus far in 2014, 9.4% and 22.5% higher, respectively, than at the end of 2013.

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The major categories of loans outstanding at September 30, 2014 and December 31, 2013 are presented in the following tables, segregated into covered loans and non-covered loans, including non-covered loans acquired from OMNI, Cameron, Florida Gulf, Trust One-Memphis, Teche, and First Private. The carrying amount of the covered loans and loans acquired from these acquisitions consisted of loans accounted for in accordance with ASC Topic 310-30 (i.e., loans impaired at the time of acquisition) and loans subject to ASC Topic 310-30 by analogy only or subject to ASC Topic 310-10 (i.e., loans performing at the time of acquisition) as detailed in the following table.

TABLE 3 – SUMMARY OF LOANS

	September 30, 2014
(Dollars in thousands)	Commercial				Mortgage				Consumer and Other
Covered loans	Real Estate		Business		1 - 4 Family		Construction		Indirect automobile		Home Equity		Credit Card		Other		Total
Impaired (1)	$	4,678	$	620	$	24,304	$	—	$	—	$	16,210	$	—	$	489	$	46,301
Performing (1)		242,478		33,614		106,672		—		—		91,601		621		2,902		477,888
Total covered loans		247,156		34,234		130,976		—		—		107,811		621		3,391		524,189
Non-covered loans
Acquired
Impaired (1)		15,061		2,562		160		—		—		1,508		—		199		19,490
Performing (1)		489,746		96,663		441,752		—		613		226,561		—		100,243		1,355,578
		504,807		99,225		441,912		—		613		228,069		—		100,442		1,375,068
Legacy loans		3,527,612		3,093,873		469,187		27,888		394,078		1,229,998		68,731		368,575		9,179,942
Total non-covered loans		4,032,419		3,193,098		911,099		27,888		394,691		1,458,067		68,731		469,017		10,555,010
Total loans	$	4,279,575	$	3,227,332	$	1,042,075	$	27,888	$	394,691	$	1,565,878	$	69,352	$	472,408	$	11,079,199
	December 31, 2013
	Commercial				Mortgage				Consumer and Other
Covered loans	Real Estate		Business		1-4 Family		Construction		Indirect automobile		Home Equity		Credit Card		Other		Total
Impaired (1)	$	14,904	$	—	$	28,223	$	—	$	—	$	21,768	$	—	$	1,182	$	66,077
Performing (1)		372,428		37,025		125,802		—		—		115,354		679		2,428		653,716
Total covered loans		387,332		37,025		154,025		—		—		137,122		679		3,610		719,793
Non-covered loans
Acquired
Impaired (1)		12,240		30		126		—		25		1,204		—		158		13,783
Performing (1)		332,829		53,007		18,009		—		1,828		52,239		—		12,210		470,122
		345,069		53,037		18,135		—		1,853		53,443		—		12,368		483,905
Legacy loans		3,134,904		2,906,051		404,922		9,450		373,383		1,101,227		63,642		294,742		8,288,321
Total non-covered loans		3,479,973		2,959,088		423,057		9,450		375,236		1,154,670		63,642		307,110		8,772,226
Total loans	$	3,867,305	$	2,996,113	$	577,082	$	9,450	$	375,236	$	1,291,792	$	64,321	$	310,720	$	9,492,019

⁽¹⁾ Loans in these categories were acquired with evidence of credit deterioration since origination. Accordingly, assumed credit losses at the purchase date were included in the balance acquired.

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Legacy loans increased $891.6 million, or 10.8%, during the first nine months of 2014, with the Houston, Texas, New Orleans, Louisiana, and Baton Rouge, Louisiana markets experiencing the largest organic growth in their loan portfolios. On a market basis, growth in the non-covered portfolio was driven by the Company’s Houston, Texas market, which grew its loan portfolio $209.0 million, or 14.8%, since the end of 2013. Loans in the New Orleans market grew $92.2 million, or 6.9%, while the Baton Rouge market contributed loan growth of $64.9 million, or 9.1%, since December 31, 2013.

The Company’s loan to deposit ratio at September 30, 2014 and December 31, 2013 was 89.5% and 88.4%, respectively. The percentage of fixed rate loans to total loans increased slightly from 50.3% at the end of 2013 to 50.4% at September 30, 2014.

Commercial Loans

Total commercial loans increased $643.5 million, or 9.4%, from December 31, 2013, with $786.5 million, or 12.2%, in non-covered loan growth and a decrease in covered commercial loans of $143.0 million, or 33.7%. During the first nine months of 2014, the Company’s acquired commercial loans increased $205.9 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 the first nine months of 2014 totaled $580.6 million. The Company continued to attract and retain commercial customers in 2014 as commercial loans were 67.8% of the total loan portfolio at September 30, 2014. Unfunded commitments on commercial loans were $2.9 billion at September 30, 2014, an increase of $233.0 million, or 8.7%, when compared to the end of the prior year.

Commercial real estate loans increased $412.3 million, or 10.7%, during the first nine months of 2014, driven by an increase in non-covered commercial real estate loans of $552.4 million, or 15.9%. At September 30, 2014, commercial real estate loans totaled $4.3 billion, or 38.6% of the total loan portfolio, compared to 40.7% 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.

As of September 30, 2014, commercial loans not secured by real estate totaled $3.2 billion, or 29.1% of the Company’s total loan portfolio. This represents a $231.2 million, or 7.7%, increase from December 31, 2013. 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.

The following table details the Company’s commercial loans by state as of the dates indicated.

TABLE 4 – COMMERCIAL LOANS BY STATE

(Dollars in thousands)	Louisiana		Florida		Alabama		Texas		Arkansas		Other		Total
September 30, 2014
Covered	$	—	$	234,161	$	47,229	$	—	$	—	$	—	$	281,390
Non-covered		3,255,277		446,748		838,482		1,563,580		691,836		429,594		7,225,517
Total commercial loans	$	3,255,277	$	680,909	$	885,711	$	1,563,580	$	691,836	$	429,594	$	7,506,907
December 31, 2013
Covered	$	—	$	363,372	$	60,985	$	—	$	—	$	—	$	424,357
Non-covered		3,035,998		335,858		795,759		1,310,352		634,071		327,023		6,439,061
Total commercial loans	$	3,035,998	$	699,230	$	856,744	$	1,310,352	$	634,071	$	327,023	$	6,863,418

Mortgage Loans

Residential 1-4 family loans comprise most of the Company’s mortgage loans. The vast majority of the Company’s residential 1-4 family mortgage loan portfolio is 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

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associated with loans of this size. Beginning in the third quarter of 2013, the Company began to invest in loans that would be considered subprime (i.e., generally loans with a borrower 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, throughout 2014, albeit up to a limited amount. The Company did not make a significant investment in subprime loans thus far in 2014. At September 30, 2014, the Company had $120.4 million in subprime mortgage loans, an increase of $3.8 million from December 31, 2013.

The Company continues to sell the majority of conforming mortgage loan originations in the secondary market on a servicing-released basis and recognize the associated fee income in earnings 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 non-covered residential mortgage loans increased $506.5 million, or 117.1% compared to December 31, 2013, the result of the private banking originations and acquired mortgage loans. The net increase of $423.8 million in acquired mortgage loans accounted for 83.7% of the year-to-date growth. These increases during the first nine months of 2014 were offset by decreases in the Company’s covered mortgage loans of $23.0 million, or 15.0%, as existing loans were paid down and most of the new mortgage loan originations were sold.

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 September 30, 2014, $2.5 billion, or 22.6%, of the Company’s total loan portfolio was comprised of consumer loans, compared to $2.0 billion, or 21.5%, at the end of 2013. Total consumer loans increased $460.3 million, or 22.5%, from December 31, 2013, with $274.1 million, or 59.6%, of the growth from home equity loans and lines of credit. The remaining growth was split between indirect automobile loans ($19.5 million) and other personal consumer loans ($166.7 million), which includes credit card loans. Of the $460.3 million increase from December 31, 2013, $228.4 million, or 49.6%, was a result of legacy consumer loan growth.

Consistent with 2013, home equity loans comprised the largest component of the Company’s consumer loan portfolio at September 30, 2014. The balance of home equity loans increased 21.2% during the year to $1.6 billion at September 30, 2014. Non-covered home equity loans increased $303.4 million in the first nine months of 2014, a result of net non-covered acquired loan growth of $174.6 million and the Company’s continued focus on expanding its total consumer portfolio through its additional investment in its consumer business. Unfunded commitments related to home equity loans and lines were $664.9 million at September 30, 2014, an increase of $150.6 million from the end of 2013. The Company has approximately $544.9 million of loans with junior liens where the Company does not hold or service the respective loans having a senior lien position. The Company believes it has addressed the risks associated with these loans in its allowance for credit losses.

Indirect automobile loans comprised the third 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. To limit this risk, an emphasis is placed on established dealerships that have demonstrated reputable behavior, both within the communities the Company serves and through long-term relationships with the Company itself. Indirect automobile loans increased $19.5 million, or 5.2%, from December 31, 2013 to September 30, 2014, and comprised 3.6% of the total loan portfolio.

The Company’s credit card loans totaled $69.4 million at September 30, 2014, an increase of 7.8% from the end of 2013. The increase in credit card loans was the result of additional card usage at the end of the third quarter of 2014. Average credit card balances have increased from $56.6 million in the third quarter of 2013 to $67.9 million for the same period of 2014, a 19.8% increase. Additionally, average balances have increased 9.5% from the fourth quarter of 2013.

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The remainder of the consumer loan portfolio at September 30, 2014 consisted of direct automobile loans and other personal consumer loans, and comprised 4.3% of the overall loan portfolio. At the end of the third quarter of 2014, the Company’s direct automobile loans totaled $140.3 million, a $47.5 million increase over December 31, 2013, and the Company’s other personal consumer loans were $332.1 million, a 52.4% increase from December 31, 2013, primarily a result of acquired installment loans and personal lines of credit. Additional information on the Company’s consumer loan portfolio is presented in the following tables. For the purposes of Table 6, unscoreable consumer loans have been included with loans with borrower FICO scores below 660. FICO scores reflect scores available as of the dates indicated, which are updated periodically but may not reflect a borrower’s FICO score as of the period indicated.

TABLE 5 – CONSUMER LOANS BY STATE

(Dollars in thousands)	Louisiana		Florida		Alabama		Texas		Arkansas		Other		Total
September 30, 2014
Covered	$	—	$	105,558	$	6,265	$	—	$	—	$	—	$	111,823
Non-covered		1,096,532		139,607		223,737		171,680		222,871		536,079		2,390,506
Total consumer loans	$	1,096,532	$	245,165	$	230,002	$	171,680	$	222,871	$	536,079	$	2,502,329
December 31, 2013
Covered	$	—	$	132,174	$	9,237	$	—	$	—	$	—	$	141,411
Non-covered		836,814		101,041		197,104		65,574		205,585		494,540		1,900,658
Total consumer loans	$	836,814	$	233,215	$	206,341	$	65,574	$	205,585	$	494,540	$	2,042,069

TABLE 6 – CONSUMER LOANS BY FICO SCORE

(Dollars in thousands)	Below 660		660 - 720		Above 720		Discount			Total
September 30, 2014
Covered	$	39,542	$	30,739	$	66,077	$	(24,535	)	$	111,823
Non-covered		395,921		573,889		1,443,095		(22,399	)		2,390,506
Total consumer loans	$	435,463	$	604,628	$	1,509,172	$	(46,934	)	$	2,502,329
December 31, 2013
Covered	$	68,333	$	35,628	$	76,500	$	(39,050	)	$	141,411
Non-covered		345,143		484,927		1,077,692		(7,104	)		1,900,658
Total consumer loans	$	413,476	$	520,555	$	1,154,192	$	(46,154	)	$	2,042,069

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Mortgage Loans Held for Sale

Loans held for sale increased $20.1 million, or 15.6%, to $148.5 million at September 30, 2014. The increase in the balance from the end of 2013 was a result of an increase in origination activity toward the end of the third quarter. Thus far in 2014, the Company originated and purchased $1.2 billion in mortgage loans, offset by net sales of $1.2 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 September 30, 2014, the Company had $3.2 million in loans that have recourse conditions for which buyers have notified the Company of potential recourse action. The Company has recorded a reserve of $2.0 million for potential repurchases at September 30, 2014. However, an insignificant number of loans have been returned to the Company during the current year.

Asset Quality

Over time, the Company’s loan portfolio has transitioned to that of a commercial bank. The Company’s focus on commercial lending brings about the potential for increased risks in the form of potentially higher levels of charge-offs and non-performing assets, as well as increased rewards in the form of potentially increased levels of shareholder returns. As the risks within the Company’s loan portfolio have evolved, management has responded by tightening underwriting guidelines and procedures, implementing more conservative loan charge-off and non-accrual 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 the first nine months of 2014, primarily as a result of decreases in the number and amount of past due loans and non-performing 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 the Board of Directors and management 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.

The Company utilizes an asset risk classification system in accordance with guidelines established by the Federal Reserve Board (“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 non-accrual 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 non-accrual 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 other real estate owned (“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.

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Under GAAP, certain loan modifications or restructurings are designated as troubled debt restructurings (“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.

Loans acquired through failed bank acquisitions, referred to as covered loans, are covered by loss sharing agreements with the FDIC until those loss sharing agreements expire, whereby the FDIC reimburses the Company for the majority of the losses incurred during the loss share claim period. Acquisition date fair values of loans covered by loss sharing agreements were determined without regard to the loss sharing agreements. In addition to covered loans, the Company also accounts for 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 310-30. Collectively, all loans accounted for under ASC 310-30 are referred to as purchased impaired loans. Application of ASC 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 for 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 non-performing 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 Table 7 below present asset quality information excluding both covered loans and acquired loans, and related amounts.

Non-performing assets excluding acquired loans decreased $11.5 million, or 15.7%, compared to December 31, 2013, as non-accrual loans decreased $5.6 million, accruing loans 90 days or more past due decreased $1.1 million, and OREO decreased $4.8 million. Including TDRs that are in compliance with their modified terms, total non-performing assets and TDRs decreased $11.8 million over the past nine months.

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The following table sets forth the composition of the Company’s non-covered non-performing assets, including accruing loans past due 90 or more days and TDRs, as of September 30, 2014 and December 31, 2013.

TABLE 7 - NON-PERFORMING ASSETS AND TROUBLED DEBT RESTRUCTURINGS (EXCLUDING ACQUIRED LOANS)

(Dollars in thousands)	September 30, 2014			December 31, 2013			Increase (Decrease)
Non-accrual loans:
Commercial and business banking	$	10,843		$	24,471		$	(13,628	)	(55.7	)%
Mortgage		17,170			10,237			6,933		67.7
Consumer and credit card		10,047			8,979			1,068		11.9
Total non-accrual loans		38,060			43,687			(5,627	)	(12.9	)
Accruing loans 90 days or more past due		4			1,075			(1,071	)	(99.6	)
Total non-performing loans (1)		38,064			44,762			(6,698	)	(15.0	)
OREO and foreclosed property (2)		23,478			28,272			(4,794	)	(17.0	)
Total non-performing assets (1)		61,542			73,034			(11,492	)	(15.7	)
Troubled debt restructuring in compliance with modified terms (3)		1,093			1,376			(283	)	(20.6	)
Total non-performing assets and troubled debt restructurings (1)	$	62,635		$	74,410		$	(11,775	)	(15.8	)%
Non-performing loans to total loans (1) (4)		0.41	%		0.54	%
Non-performing assets to total assets (1) (4)		0.46	%		0.61	%
Non-performing assets and troubled debt restructurings to total assets (1) (4)		0.46	%		0.62	%
Allowance for credit losses to non-performing loans (4) (5)		222.35	%		175.26	%
Allowance for credit losses to total loans (4) (5)		0.92	%		0.95	%

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

⁽²⁾  OREO and foreclosed property at September 30, 2014 and December 31, 2013 include $12.7 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 September 30, 2014 and December 31, 2013 do not include $2.3 million and $18.5 million 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 0.41% of total legacy loans at September 30, 2014, 13 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 1.77% of total loans at September 30, 2014 and 2.87% at December 31, 2013. The allowance for credit losses as a percentage of non-performing loans was 222.4% at September 30, 2014 and 175.3% at December 31, 2013. Including covered loans and pooled loans, the allowance for credit losses as a percentage of total loans was 1.32% at September 30, 2014 and 1.62% at December 31, 2013.

Non-performing assets as a percentage of total assets have remained at relatively low levels. Total non-performing assets were 0.46% of non-covered, non-acquired assets at September 30, 2014, 15 basis points below December 31, 2013. Consistent with the overall improvement in asset quality, the Company’s allowance for credit losses as a percentage of loans, excluding reserves for acquired loans, decreased three basis points from 2013 to 0.92% at September 30, 2014.

Loans defined as TDRs not included in non-performing assets decreased to $1.1 million at the end of the third quarter of 2014. Total legacy TDRs totaled $3.4 million at September 30, 2014, $16.5 million, or 82.8%, lower than at December 31, 2013, driven primarily from the payoff of one relationship totaling $10.4 million at December 31, 2013. There were no additions to legacy TDRs during the first nine months of 2014.

The Company had gross charge-offs on non-acquired loans of $8.2 million during the nine months ended September 30, 2014. Offsetting these charge-offs were recoveries of $4.3 million. As a result, net charge-offs on non-acquired loans during the first three quarters of 2014 were $3.9 million, or 0.06% of average loans, compared to net charge-offs of $3.1 million, or 0.05%, for the first nine months of 2013.

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At September 30, 2014, excluding loans covered by the FDIC loss share agreements (see “Covered Loans” below) and acquired loans, the Company had $65.0 million of assets classified as substandard, $2.4 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 0.73% of total loans, compared to 0.99% at December 31, 2013. 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 and doubtful loans at September 30, 2014 according to the Company’s allowance for credit losses policy.

In addition to the problem loans described above, excluding covered loans and acquired loans, there were $75.9 million of loans classified as “special mention” at September 30, 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 cause 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 non-performing. Special mention loans increased $30.1 million from December 31, 2013 as a result of the movement of a limited number of loans to special mention during the year.

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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 September 30, 2014, total past due loans excluding covered loans were 0.96% of total loans, a decrease of 29 basis points from December 31, 2013. Including covered loans, loans past due 30 days or more were 1.96% of total loans before discount adjustments at September 30, 2014 and 3.24% at December 31, 2013. Past due non-covered loans (including non-accrual loans) decreased $8.1 million, or 7.4%, from December 31, 2013, and can be attributed to lower levels of accruing loans past due. Additional information on non-covered past due loans is presented in the following table.

TABLE 8 - PAST DUE NON-COVERED LOAN SEGREGATION

	September 30, 2014
	Non-acquired					Acquired					Total
(Dollars in thousands)			% of Outstanding					% of Outstanding					% of Outstanding
Accruing loans:	Amount		Balance			Amount		Balance			Amount		Balance
30-59 days past due	$	9,243		0.10	%	$	4,556		0.31	%	$	13,799		0.13	%
60-89 days past due		3,198		0.03			2,289		0.16			5,487		0.05
90-119 days past due		4		0.00			—		—			4		0.00
120 days past due or more		—		—			—		—			—		—
		12,445		0.14			6,845		0.47			19,290		0.18
Non-accrual loans (1)		38,060		0.41			43,838		3.03			81,898		0.78
	$	50,505		0.55	%	$	50,683		3.50	%	$	101,188		0.96	%
	December 31, 2013
	Non-acquired					Acquired					Total
(Dollars in thousands)			% of Outstanding					% of Outstanding					% of Outstanding
Accruing loans:	Amount		Balance			Amount		Balance			Amount		Balance
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		0.00			103		0.02			211		0.00
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⁾  For acquired loans, balance represents the outstanding balance of loans that would otherwise meet the Company’s definition of nonaccrual loans.

The $8.1 million decrease in non-covered past due loans was the result of a $9.5 million decrease in accruing loans past due ($7.9 million of which were loans past due less than 90 days), offset partially by a $1.5 million increase in non-accrual loans (all from the acquired portfolio). Commercial non-accrual loans decreased $18.9 million, or 33.9%, while mortgage non-accrual loans increased $14.1 million and consumer non-accrual loans increased $6.3 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 the first three quarters of 2014 in response to their continued past due status. As a percentage of outstanding loans, consumer nonaccrual loans were 0.84% of consumer loans at September 30, 2014 and 0.74% at December 31, 2013.

In the non-covered commercial loan portfolio, total accruing loans past due decreased $12.8 million, or 66.5%, from December 31, 2013. Total non-covered mortgage loans past due increased $1.2 million during the first nine months of 2014, with 100.0% due less than 90 days and 45.9% 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

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 of October 1, 2014, certain CSB non-single family residential (“Non-SFR”) covered loans have lost loss share coverage due to the expiration of coverage in accordance with the loss share agreement. Certain non-SFR covered loans acquired from Orion and Century will also lose loss share coverage within the next 12 months. See Table 10 below for additional information on these loans.

Although covered loans are not included in the Company’s non-performing 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 non-performing 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 9 – PAST DUE COVERED LOAN SEGREGATION

	September 30, 2014					December 31, 2013
(Dollars in thousands)			% of Outstanding					% of Outstanding
Accruing loans:	Amount		Balance			Amount		Balance
30-59 days past due	$	3,093		0.51	%	$	8,474		1.01	%
60-89 days past due		1,405		0.23			5,222		0.62
90-119 days past due		186		0.03			579		0.07
120 days past due or more		—		—			—		—
Total accruing loans		4,684		0.78			14,275		1.70
Non-accrual loans (1)		113,781		18.88			190,016		22.68
Total past due loans	$	118,465		19.66	%	$	204,291		24.38	%

⁽¹⁾  For covered loans, balance represents the outstanding balance of loans that would otherwise meet the Company’s definition of nonaccrual loans.

Total covered loans past due at September 30, 2014 totaled $118.5 million before discounts, a decrease of $85.8 million, or 42.0%, 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 loans at the end of the third quarter of 2014 included $113.8 million in loans that would otherwise meet the Company’s definition of non-accrual loans and $4.7 million in accruing loans past due greater than 30 days. Of the $4.7 million in accruing loans past due, $4.5 million, or 96.0%, 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.

Non-performing loans (defined as accruing loans greater than 90 days past due and loans that meet the definition of non-accrual loans) decreased $76.6 million, or 40.2% from December 31, 2013. These decreases were primarily a result of loan payments during the current year.

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Of the $556.2 million in covered assets at September 30, 2014, $285.4 million will lose loss share coverage within the next 12 months. The following table provides additional information as of September 30, 2014 on the covered assets losing loss share coverage within the next 12 months. When the coverage period ends, these assets will be included in asset quality information presented in Table 8 above, in future reporting periods, as part of the non-covered acquired loans. Amounts in the table are presented gross of discounts unless otherwise noted.

TABLE 10 – COVERED ASSETS BY LOSS SHARE COVERAGE PERIOD

	Covered Assets
	Non-Single Family Residential Loans (Losing Loss Share Coverage as of October 1, 2014)			Non-Single Family Residential Loans (Losing Loss Share Coverage within the next 12 months) (1)			Single Family Residential Loans (Losing Loss Share Coverage 10 years from Date of Acquisition)
(Dollars in thousands)
Loans, net	$	44,880		$	219,930		$	259,379
Other real estate owned		2,688			17,947			11,327
Allowance for loan losses		(8,661	)		(34,581	)		(15,855	)
Nonaccrual loans	$	15,291		$	46,554		$	51,937
Foreclosed assets		—			972			—
Other real estate owned		2,688			16,975			11,327
Accruing loans more than 90 days past due		—			—			186
Nonperforming assets	$	17,979		$	64,501		$	63,450
Total past due loans	$	15,334		$	48,647		$	54,484
NPAs/(Loans + OREO)		37.80	%		27.12	%		23.44	%
(Past Dues & Nonaccruals)/Loans		34.17	%		22.12	%		21.01	%

⁽¹⁾  $259.4 million of loans are maintaining loss share coverage beyond the next 12 months. $13.8 million of indemnification asset is collectible from the FDIC and OREO transactions beyond the next twelve months.

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 non-accrual 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 of the Company’s Form 10-K filing for the year ended December 31, 2013 for more information.

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During the first nine months of 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.

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.

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 and ASC 310-10. See the discussion above 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. 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. Within a one-year period, 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, 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 September 30, 2014, the Company had an allowance for credit losses of $59.1 million and $2.9 million in the covered loan and acquired loan portfolios, respectively, to reserve for expected losses currently in those portfolios 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 September 30, 2014 and December 31, 2013 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 for the periods indicated.

TABLE 11 - SUMMARY OF ACTIVITY IN THE ALLOWANCE FOR CREDIT LOSSES

	September 30, 2014												September 30, 2013
				Non-covered loans												Non-covered loans
(Dollars in thousands)	Covered Loans			Legacy Loans			Acquired Loans			Total			Covered Loans			Legacy Loans			Acquired Loans			Total
Allowance for loan losses
Balance at beginning of period	$	71,175		$	67,342		$	4,557		$	143,074		$	168,576		$	74,211		$	8,816		$	251,603
(Reversal of) Provision for loan losses before
benefit attributable to FDIC loss share agreements		5,878			9,099			(1,259	)		13,718			(58,540	)		2,884			(2,464	)		(58,120	)
Benefit attributable to FDIC loss share agreements		(1,153	)		—			—			(1,153	)		58,565			—			—			58,565
Net (reversal of) provision for loan losses		4,725			9,099			(1,259	)		12,565			25			2,884			(2,464	)		445
(Decrease) Increase in FDIC loss share receivable		1,153			—			—			1,153			(58,565	)		—			—			(58,565	)
Transfer of balance to OREO		(5,171	)		—			(207	)		(5,378	)		(29,302	)		—			(1,013	)		(30,315	)
Transfer of balance to the RUFC		—			—			—			—			—			(9,828	)		—			(9,828	)
Loan charge-offs		(12,823	)		(8,242	)		(586	)		(21,651	)		(1,683	)		(7,455	)		(10	)		(9,148	)
Recoveries		38			4,338			401			4,777			—			4,353			—			4,353
Balance at end of period		59,097			72,537			2,906			134,540			79,051			64,165			5,329			148,545
Reserve for unfunded lending commitments
Balance at beginning of period		—			11,147			—			11,147			—			—			—			—
Transfer of balance from the RUFC		—			—			—			—			—			9,828			—			9,828
Provision for unfunded lending commitments		—			952			—			952			—			2,131			—			2,131
Balance at end of period		—			12,099			—			12,099			—			11,959			—			11,959
Allowance for credit losses	$	59,097		$	84,636		$	2,906		$	146,639		$	79,051		$	76,124		$	5,329		$	160,504

The allowance for credit losses was $146.6 million at September 30, 2014, or 1.32% of total loans, which is $7.6 million lower than at December 31, 2013. The allowance as a percentage of loans was 1.32% at September 30, 2014, 30 basis points below 1.62% at December 31, 2013.

The decrease in the allowance was primarily related to a decrease in reserves on the covered and acquired loan portfolios. The allowance for credit losses on the covered portion of the loan portfolio decreased $12.1 million primarily due to a change in expected cash flows on certain of the acquired loan pools during the first three quarters of 2014. The reserve was adjusted to cover the expected losses in these pools. The reserve was also reduced by $5.2 million when loan collateral was moved to OREO during the first nine months of 2014.

For the non-covered portfolio, the allowance for credit losses on the legacy portfolio increased $6.1 million, or 7.3%, since December 31, 2013. Legacy asset quality improved over the prior year as evidenced by continued lower levels of net charge-offs and past due loans, which offset the additional allowance needed to reserve for legacy loan growth over the past nine months. The non-covered allowance for credit losses, however, includes a reserve of $2.9 million for probable losses in the acquired portfolios at September 30, 2014 above estimated expected credit losses at acquisition.

At September 30, 2014 and December 31, 2013, excluding the acquired loan portfolios, the allowance for loan losses covered non-performing loans 1.9 times and 1.5 times, respectively. Including acquired non-covered loans, the allowance for loan losses covered 74.6% of total past due and non-accrual loans at September 30, 2014, an increase compared to the December 31, 2013 coverage of 65.8%.

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FDIC Loss Share Receivable

As part of the FDIC-assisted acquisitions in 2009 and 2010, the Company recorded $1.0 billion in receivables from the FDIC, which represents the fair value of the expected reimbursable losses covered by the loss share agreements as of the acquisition dates. The FDIC loss share receivables decreased $67.6 million, or 41.6%, during the first nine months of 2014 as the Company reduced the balances by $7.1 million as a result of an improvement in estimated cash flows on OREO and $61.4 million as a result of amortization during the first nine months of 2014. See Note 8 to the unaudited consolidated financial statements for discussion of the reimbursable loss periods of the loss share agreements and additional information on FDIC loss share receivable activity.

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 for the nine-month periods ended September 30, 2014 and 2013. Therefore, the Company recognized a valuation allowance against the indemnification assets in the amount of $31.8 million in 2013 and $5.1 million in 2014 through a charge to net income.

Of the FDIC loss share receivables balance of $94.7 million at September 30, 2014, approximately $27.9 million is expected to be collected from the FDIC, $63.5 million, which represents improvements in cash flows expected to be collected from customers, is expected to be amortized over time, and $3.3 million is expected to be collected in conjunction with OREO transactions. For certain covered assets, loss share coverage expires in the next 12 months. At September 30, 2014, the FDIC loss share receivables included $2.2 million and $0.7 million related to these assets that is expected to be collected from the FDIC and OREO transactions, respectively. 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 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 the third quarter of 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 statements of comprehensive income for the three and nine months ended September 30, 2014. Although no liability for clawback is recorded at September 30, 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.

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Investment Securities

Investment securities increased $133.4 million, or 6.4%, from December 31, 2013 to September 30, 2014 due to both acquired investment securities and open-market security purchases. Investment securities decreased to 14.3% of total assets at September 30, 2014, from 15.6% at December 31, 2013. Investment securities were 16.4% of average earnings assets in the first nine months of 2014 and 17.7% in the same period of 2013. The following table shows the carrying values of securities by category as of the dates indicated.

TABLE 12 - CARRYING VALUE OF SECURITIES

(Dollars in thousands)	September 30, 2014				December 31, 2013
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	354,943	16	%	$	395,561	19	%
Obligations of state and political subdivisions		91,786	4			107,479	5
Mortgage-backed securities		1,655,616	74			1,432,278	68
Other securities		1,483	—			1,479	—
Total securities available for sale		2,103,828	94			1,936,797	92
Securities held to maturity:
U.S. Government-sponsored enterprise obligations		10,000	1			34,478	2
Obligations of state and political subdivisions		79,309	4			84,290	4
Mortgage-backed securities		31,211	1			35,341	2
Total securities held to maturity		120,520	6			154,109	8
Total investment securities	$	2,224,348	100	%	$	2,090,906	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 third lien elements in its investment portfolio. At September 30, 2014 and December 31, 2013, the Company’s investment portfolio did not contain any securities that are directly backed by subprime or Alt-A mortgages.

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 September 30, 2014 and December 31, 2013. Note 5 to the unaudited 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 $410.9 million at September 30, 2014 increased $258.1 million, or 169.0%, from December 31, 2013. The primary cause of the increase was the Company’s acquisition of interest-bearing deposits from Teche and First Private, partially offset by the use of available cash to purchase higher-yielding investment securities, pay off maturing debt advances, and fund loan growth, 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 the changes in other asset balances as of the periods indicated.

TABLE 13 - OTHER ASSETS COMPOSITION

(Dollars in thousands)
	September 30, 2014		December 31, 2013		Increase (Decrease)
Other Earning Assets
FHLB and FRB stock	$	76,665	$	53,773	$	22,892		42.6	%
Fed funds sold and financing transactions		—		—		—		—
Other interest-earning assets (1)		5,412		3,412		2,000		58.6
Total other earning assets		82,077		57,185		24,892		43.5
Non-Earning Assets
Premises and equipment		307,868		287,510		20,358		7.1
Bank-owned life insurance		121,522		104,203		17,319		16.6
Goodwill		526,242		401,872		124,370		30.9
Core deposit intangibles		16,000		14,622		1,378		9.4
Title plant and other intangible assets		7,602		7,439		163		2.2
Accrued interest receivable		37,143		32,143		5,000		15.6
Other real estate owned		63,386		99,173		(35,787	)	(36.1	)
Derivative market value		32,290		30,076		2,214		7.4
Receivable due from the FDIC		245		2,609		(2,364	)	(90.6	)
Investment in tax credit entities		138,486		132,487		5,999		4.5
Other		103,492		74,230		29,262		39.4
Total non-earning assets		1,354,276		1,186,364		167,912		14.2
Total other assets	$	1,436,353	$	1,243,549	$	192,804		15.5	%

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

The $22.9 million increase in FHLB and FRB stock was the result of $8.7 million in acquired stock, as well as $14.2 million in net stock purchases during the first nine months of 2014.

Fed funds sold and financing transactions represent short-term excess liquidity, and the balance varies based on the daily requirements of short-term liquidity needed by the Company and its subsidiaries for loan growth and other operating activities. There were no fed funds sold or financing transactions at September 30, 2014 or December 31, 2013.

Premises and equipment increased $20.4 million as a result of $24.3 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 $17.3 million as a result of $15.5 million in acquired policies from Teche and income earned on the outstanding policies during the first nine months of 2014.

Core deposit intangibles increased $1.4 million during the current period, the result of an additional $5.2 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 the first nine months of 2014.

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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 $35.8 million decrease in OREO from December 31, 2013 was a result of the sale of OREO properties. Covered OREO properties at September 30, 2014 were $29.8 million, or 48.3%, lower than at the end of 2013. Covered OREO properties were $32.0 million and $61.8 million at September 30, 2014 and December 31, 2013, respectively. Non-covered OREO decreased $5.9 million, or 15.9%, and was primarily a result of the sales of non-covered OREO properties during the first nine months of 2014 outpacing increases from the acquisition of $1.5 million from Teche and Trust One-Memphis and the movement of $9.4 million in former bank properties to OREO.

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. The value of the derivatives at September 30, 2014 was positively affected by interest rates at the end of the third quarter.

The receivable due from the FDIC from claims associated with the loss share agreements decreased $2.4 million during the first nine months of 2014 compared to December 31, 2013. The balance at September 30, 2014 was a result of the timing of repayment from the FDIC of losses submitted and timing of losses incurred. The Company’s submission of losses has declined as the Company continues to manage the covered assets to ultimate disposition in a manner that is of least loss to the FDIC. The balance due from the FDIC includes the reimbursable portion of incurred losses, net of recoveries (as those terms are defined in the respective loss share agreements) and reimbursable expenses, which were approximately $1.9 million and $2.8 million at September 30, 2014 and December 31, 2013, respectively.

Investments in tax credit entities increased $6.0 million as a result of additional low-income housing tax credit investments totaling $10.4 million in the first nine months of 2014, partially offset by the amortization of tax credits as they are recognized in the Company’s income tax provision calculation.

The $29.3 million increase in other assets since December 31, 2013 was primarily the result of a $31.2 million increase in the Company’s net current and deferred income tax receivables as a result of additional estimated income tax payments recorded during the first nine months of 2014, as well as acquired deferred tax assets. Also affecting other assets was a $2.1 million increase in deferred compensation assets held that are related to current year employee compensation deferrals. Offsetting these increases were decreases in prepaid assets and other current receivables since December 31, 2013.

There were no significant changes in the Company’s title plant or other intangible asset balances since December 31, 2013. Additional intangible assets created in the asset acquisitions of The Title Company LLC and Louisiana Abstract and Title, LLC during the first nine months of 2014 were offset by amortization expense on existing intangible assets.

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 accounts, 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 important funding sources 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 and uses thereof. The following discussion highlights the major changes in the mix of deposits and other funding sources from December 31, 2013.

Deposits

The Company’s ability to attract and retain customer deposits is critical to the Company’s continued success. During the first nine months of 2014, total deposits increased $1.6 billion, or 15.3%, totaling $12.4 billion at September 30, 2014. Total non-interest-bearing deposits increased $581.5 million and interest-bearing deposits increased $1.1 billion, or 13.0%, 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 $497.6 million, or 30.3% of the total growth from December 31, 2013, was a result of organic deposit growth.

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The following table and chart set forth the composition of the Company’s deposits for the periods indicated.

TABLE 14 - DEPOSIT COMPOSITION BY PRODUCT

(Dollars in thousands)	September 30, 2014				December 31, 2013				Increase (Decrease)
Non-interest-bearing deposits	$	3,157,453	26	%	$	2,575,939	24	%	$	581,514		22.6	%
NOW accounts		2,194,803	18			2,283,491	22			(88,688	)	(3.9	)%
Money market accounts		4,346,173	35			3,779,581	35			566,592		15.0	%
Savings accounts		575,337	5			387,397	3			187,940		48.5	%
Certificates of deposit		2,104,009	16			1,710,592	16			393,417		23.0	%
Total deposits	$	12,377,775	100	%	$	10,737,000	100	%	$	1,640,775		15.3	%

From a product perspective, non-interest-bearing deposits increased $581.5 million. Interest-bearing core deposit increases totaled $665.8 million, while time deposits increased $393.4 million. Certificates of deposit in denominations of $100,000 and over increased $164.8 million, or 18.2%, to $1.1 billion at September 30, 2014. The increase was seen in many of the Company’s markets, including the Houston, Texas, Little Rock, Arkansas, and Birmingham, Alabama markets.

Non-interest-bearing deposits continue to provide the Company with a good source of available funds for continued earning asset growth. Non-interest-bearing deposits as a percentage of total deposits have steadily risen over the past nine months, from 24.0% at December 31, 2013 to 25.5% at September 30, 2014.

From a market perspective, total deposit growth was seen primarily in the Houston and Little Rock markets. Houston’s customer deposits increased $126.5 million, or 13.7%, during the first nine months of 2014. Total deposits in the Little Rock market increased $102.2 million, or 21.3%, since the end of 2013, while the Birmingham market had total customer deposit growth of $50.0 million, or 11.7%. Total deposit growth was offset, however, by deposit runoff in the Sarasota, Florida market ($43.3 million) and Southeast Florida ($18.6 million).

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 quarters ended September 30:

TABLE 15 – REPURCHASE TRANSACTIONS

(Dollars in thousands)	2014		2013
Average balance	$	292,677	$	288,029
Ending balance		259,783		258,850

Total short-term borrowings increased $132.4 million, or 19.5%, from December 31, 2013, to $812.8 million at the end of the third quarter of 2014, a result of both acquired short-term borrowings from Teche and First Private and additional FHLB short-term advances originated by the Company. The increase was the result of an additional $178.0 million in short-term FHLB advances outstanding at September 30, 2014. The Company borrowed these funds in order to manage its liquidity as it funded loan growth in the fourth quarter of 2013 and first nine months of 2014. On an average basis, short-term borrowings increased $512.7 million, or 175.3%, from the first nine months of 2013. The increase in the average outstanding balance was largely due to the FHLB advances outstanding at September 30, 2014 (there were minimal short-term FHLB advances outstanding during the first nine months of 2013), as management’s decision has typically been to use available cash to reduce higher-cost funding sources.

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Total short-term borrowings were 5.9% of total liabilities and 69.6% of total borrowings at September 30, 2014 compared to 5.7% and 70.8%, respectively, at December 31, 2013. On an average basis, short-term borrowings were 6.7% of total liabilities and 71.9% of total borrowings in the third quarter of 2014, compared to 2.5% and 50.6%, respectively, during the third quarter of 2013.

The weighted average rate paid on short-term borrowings was 0.17% during the first nine months of 2014, up one basis point compared to 0.16% for the first three quarters of 2013.

Long-term Debt

The Company’s long-term borrowings increased $74.9 million, or 26.7%, from December 31, 2013, a result of acquired Teche and First Private borrowings, offset partially by the scheduled repayment of a portion of the Company’s long-term FHLB advances during 2014. The Company’s efforts to periodically reduce the balance of these higher-priced long-term borrowings has led to a $0.7 million reduction in interest expense on long-term debt in 2014 when compared to the same period of 2013.

On average, long-term debt decreased to $314.9 million in the first nine months of 2014, $13.9 million, or 4.2%, lower than for the same period of 2013. Average long-term debt was 2.5% of total liabilities during the current year, lower than the average during 2013 of 2.9%. On a period-end basis, long-term debt was 2.6% of total liabilities at September 30, 2014, an increase from 2.4% of total liabilities at December 31, 2013.

Long-term borrowings at September 30, 2014 included $162.7 million in fixed-rate advances from the FHLB of Dallas that cannot be paid off without incurring substantial prepayment penalties. The remaining debt consisted of $111.9 million of the Company’s junior subordinated deferrable interest debentures and $81.0 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.

Shareholders’ Equity

Shareholders’ equity provides a source of permanent funding, allows for future growth, and provides the Company with a cushion to withstand unforeseen adverse developments. At September 30, 2014, shareholders’ equity totaled $1.8 billion, an increase of $286.6 million, or 18.7%, compared to December 31, 2013.

During the nine months ended September 30, 2014, the Company issued 3.3 million additional common shares as part of the Teche and First Private acquisitions, which resulted in $214.7 million in additional shareholders’ equity. Net income of $70.7 million for the first nine months of 2014 was offset by dividend payments to common shareholders of $32.9 million, or $1.02 per common share, in the first nine months of 2014. Shareholders’ equity also increased $16.2 million as a result of an increase in the fair value of the Company’s available for sale investment securities.

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CAPITAL RESOURCES

Federal regulations impose minimum regulatory capital requirements on all institutions with deposits insured by the Federal Deposit Insurance Corporation. 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 September 30, 2014 and December 31, 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.

TABLE 16 - REGULATORY CAPITAL RATIOS

(Dollars in thousands)		Well-Capitalized			September 30, 2014			December 31, 2013
Ratio	Entity	Minimums			Actual			Actual
Tier 1 Leverage	Consolidated		5.00	%		9.22	%		9.70	%
	IBERIABANK		5.00			8.25			8.46
Tier 1 risk-based capital	Consolidated		6.00			11.23			11.57
	IBERIABANK		6.00			10.03			10.08
Total risk-based capital	Consolidated		10.00			12.42			12.82
	IBERIABANK		10.00			11.23			11.33

The decrease in risk-based capital ratios 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 that carried a 0% risk weighting into loans and other investments that carried a higher risk rating, namely loans and investment securities. Also affecting capital ratios at September 30, 2014 was a decrease in covered assets, which typically are assigned a lower risk rating.

At both September 30, 2014 and December 31, 2013, $108.5 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 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 September 30, 2014 by 36 basis points and 45 basis points, respectively.

By the end of 2014, the Company’s loss-share protection on certain acquired non-single family loans associated with three 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 September 30, 2014 by 17 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”.

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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 Basel Committee on Banking Supervision or “Basel III”, and to address relevant provisions of the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Dodd-Frank Act”). The Company and IBERIABANK will become subject to the new rules on January 1, 2015, and 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 of 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%,

• 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 September 30, 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 $29.7 million and $23.2 million for the three months ended September 30, 2014 and 2013, respectively. Earnings per share (“EPS”) on a diluted basis were $0.89 for the third quarter of 2014 and $0.78 for the third quarter of 2013. For the nine-month period ended September 30, 2014, income available to common shareholders of $70.7 million, or $2.25 per diluted share, was $31.2 million higher than for the same nine-month period of 2013.

In the third quarter of 2014, net interest income increased $23.6 million, or 24.2%, over the third quarter of 2013, as interest income increased $24.7 million, or 22.7%, and interest expense decreased $1.1 million, or 9.6%. Net interest income increased as a result of an increase in average earning assets, a seven basis point increase in the yield on earning assets, and a three basis point decrease in the cost of interest-bearing liabilities. Income available to common shareholders was negatively impacted by a $3.7 million increase in the provision for loan losses, but was positively impacted by a $2.4 million increase in non-interest income, the drivers of which are discussed below in the “Non-interest Income” section of the discussion.

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As a result of higher pre-tax income, income tax expense increased $3.8 million in the third quarter of 2014 when compared to the same period of 2013. Cash earnings, defined as net income before the net-of-tax amortization of acquisition intangibles, were $30.7 million and $24.0 million for the quarterly periods ended September 30, 2014 and 2013, respectively.

For the nine months ended September 30, 2014, income available to common shareholders increased $31.2 million as net interest income increased $47.6 million, or 16.6%, over the nine months ended September 30, 2013, while non-interest income decreased $0.9 million, or 0.7%, non-interest expense decreased $15.5 million, or 4.2%, and income tax expense increased $18.9 million.

The following discussion provides additional information on the Company’s operating results for the three and nine months ended September 30, 2014 and 2013, 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 the primary 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 3.36% and 3.25% during the three months ended September 30, 2014 and 2013, respectively, and 3.38% and 3.22% for the respective nine-month periods. 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 3.47% and 3.37% for the third quarters of 2014 and 2013, respectively, and 3.49% and 3.33% for the nine-month periods.

Net interest income increased $23.6 million for the third quarter of 2014 when compared to the same period of 2013, and $47.6 million, or 16.6%, on a year-to-date basis. The improvement in net interest income was the result of an increase in average earning assets, improvement in earning asset yield, and a decrease in the average cost 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 78.8% and 74.9% of average earning assets in the first three quarters of 2014 and 2013, respectively. Quarter-to-date average loans increased $1.8 billion, or 20.0%, from the fourth quarter of 2013 and $2.0 billion, or 22.6%, from the third quarter of 2013, both as a result of acquired loans and organic loan growth in the non-covered loan portfolio. Investment securities made up 16.4% of average earning assets during the first three quarters of 2014, compared to 17.7% during the same period of 2013. Over the past year, management has focused efforts to reduce its lower-yielding excess liquidity (defined as fed funds sold and interest-bearing cash) by investing in higher-yielding loans and investment securities, as well as periodically paying down portions of its short-term and long-term debt in efforts to improve net interest income. Other components of earning assets during the first nine months of 2014 included the FDIC loss share receivable (1.0% of average earning assets) and excess liquidity (2.2% of average earning assets). During the first three quarters of 2013, the FDIC loss share receivable was 2.5% of average earning assets, with excess liquidity accounting for 3.2% of average earning assets.

Average interest-bearing deposits made up 88.4% of average interest-bearing liabilities during the first nine months of 2014, down from 93.3% during the first three quarters of 2013. Average short-term and long-term borrowings made up 8.3% and 3.3% of average interest-bearing liabilities, respectively, thus far in 2014, compared to 3.2% and 3.5%, respectively, during the first nine months of 2013.

The following tables set forth, for the three months and nine months ended September 30, 2014 and 2013, 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. TE yields are calculated using a marginal tax rate of 35%.

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TABLE 17 – QUARTER-TO-DATE AVERAGE BALANCES, NET INTEREST INCOME AND INTEREST YIELDS / RATES

	Three Months Ended September 30,
	2014									2013
(Dollars in thousands)	Average Balance			Interest Income/Expense			Yield/ Rate			Average Balance			Interest Income/Expense			Yield/ Rate
Earning Assets:
Loans receivable:
Commercial loans (TE)	$	7,468,004		$	97,321			5.17	%	$	6,443,410		$	88,934			5.49	%
Mortgage loans		1,110,718			14,375			5.18			545,017			6,884			5.05
Consumer and other loans		2,429,441			33,150			5.41			1,986,920			24,217			4.84
Total loans		11,008,163			144,846			5.22			8,975,347			120,035			5.32
Loans held for sale		165,791			1,594			3.84			119,343			1,289			4.32
Investment securities (TE)		2,137,736			10,994			2.20			2,093,549			9,486			1.98
FDIC loss share receivable		111,383			(25,120	)		(88.25	)		228,047			(22,875	)		(39.25	)
Other earning assets		567,895			853			0.60			258,362			577			0.89
Total earning assets		13,990,968			133,167			3.81			11,674,648			108,512			3.74
Allowance for loan losses		(133,443	)								(160,994	)
Non-earning assets		1,620,881									1,430,781
Total assets	$	15,478,406								$	12,944,435
Interest-bearing liabilities
Deposits:
NOW accounts	$	2,228,378		$	1,546			0.28	%	$	2,257,050		$	1,909			0.34	%
Savings and money market accounts		4,877,051			3,588			0.29			4,213,764			2,603			0.25
Certificates of deposit		2,060,085			4,067			0.78			1,918,669			4,012			0.83
Total interest-bearing deposits		9,165,514			9,201			0.40			8,389,483			8,524			0.40
Short-term borrowings		919,869			406			0.17			289,659			104			0.14
Long-term debt		358,970			2,519			2.75			282,314			2,432			3.37
Total interest-bearing liabilities		10,444,353			12,126			0.46			8,961,456			11,060			0.49
Non-interest-bearing demand deposits		3,057,513									2,338,772
Non-interest-bearing liabilities		167,821									130,052
Total liabilities		13,669,687									11,430,280
Shareholders’ equity		1,808,719									1,514,155
Total liabilities and shareholders’ equity	$	15,478,406								$	12,944,435
Net earning assets	$	3,546,615								$	2,713,192
Net interest spread				$	121,041			3.36	%				$	97,452			3.25	%
Net interest income (TE) / Net interest margin (TE)				$	123,175			3.47	%				$	99,773			3.37	%

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TABLE 18 –YEAR-TO-DATE AVERAGE BALANCES, NET INTEREST INCOME AND INTEREST YIELDS / RATES

	Nine Months Ended September 30,
	2014									2013
(Dollars in thousands)	Average Balance			Interest Income/Expense			Yield/ Rate			Average Balance			Interest Income/Expense			Yield/ Rate
Earning Assets:
Loans receivable:
Commercial loans (TE)	$	7,159,481		$	268,866			5.03	%	$	6,324,468		$	258,420			5.48	%
Mortgage loans		804,710			32,438			5.37			504,154			21,868			5.78
Consumer and other loans		2,228,904			87,820			5.27			1,928,747			78,056			5.41
Total loans		10,193,095			389,124			5.11			8,757,369			358,344			5.48
Loans held for sale		134,232			3,953			3.93			155,900			3,965			3.39
Investment securities (TE)		2,120,226			32,911			2.22			2,065,295			27,323			1.94
FDIC loss share receivable		132,306			(61,393	)		(61.19	)		293,116			(68,707	)		(30.91	)
Other earning assets		351,232			2,024			0.77			423,776			2,180			0.69
Total earning assets		12,931,091			366,619			3.83			11,695,456			323,105			3.74
Allowance for loan losses		(135,050	)								(196,412	)
Non-earning assets		1,506,110									1,467,475
Total assets	$	14,302,151								$	12,966,519
Interest-bearing liabilities
Deposits:
NOW accounts	$	2,229,454		$	4,480			0.27	%	$	2,402,803		$	5,836			0.32	%
Savings and money market accounts		4,517,549			9,108			0.27			4,166,013			8,864			0.28
Certificates of deposit		1,817,156			10,093			0.74			2,024,369			13,038			0.86
Total interest-bearing deposits		8,564,159			23,681			0.37			8,593,185			27,738			0.43
Short-term borrowings		805,167			1,022			0.17			292,453			365			0.16
Long-term debt		314,924			7,489			3.14			328,856			8,196			3.29
Total interest-bearing liabilities		9,684,250			32,192			0.44			9,214,494			36,299			0.52
Non-interest-bearing demand deposits		2,811,276									2,097,110
Non-interest-bearing liabilities		139,669									130,368
Total liabilities		12,635,195									11,441,972
Shareholders’ equity		1,666,956									1,524,547
Total liabilities and shareholders’ equity	$	14,302,151								$	12,966,519
Net earning assets	$	3,246,841								$	2,480,962
Net interest spread				$	334,427			3.38	%				$	286,806			3.22	%
Net interest income (TE) / Net interest margin (TE)				$	340,981			3.49	%				$	293,988			3.33	%

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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 19 - AVERAGE LOAN BALANCE AND YIELDS

	Three Months Ended September 30,										Nine Months Ended September 30,
	2014					2013					2014					2013
(Dollars in thousands)	Average Balance		Average Yield			Average Balance		Average Yield			Average Balance		Average Yield			Average Balance		Average Yield
Non-covered loans (TE) (1)	$	10,449,589		4.37	%	$	8,103,580		4.39	%	$	9,568,573		4.35	%	$	7,802,719		4.41	%
Covered loans (TE) (1)		558,574		21.64			871,768		13.90			624,522		16.89		$	954,650		14.28
FDIC loss share receivables		111,383		(88.25	)		228,047		(39.25	)		132,306		(61.19	)		293,116		(30.91	)
Covered loans, net of FDIC loss share receivables		669,957		3.07			1,099,815		3.66			756,828		3.14			1,247,766		3.64
Total loans and FDIC loss share receivables	$	11,119,546		3.07	%	$	9,203,395		4.21	%	$	10,325,401		4.26	%	$	9,050,485		4.30	%

⁽¹⁾ Taxable equivalent yields are calculated using a marginal tax rate of 35%.

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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 20 - SUMMARY OF CHANGES IN NET INTEREST INCOME

	For the Three Months Ended September 30									For the Nine Months Ended September 30
	2014/2013									2014/2013
	Change Attributable To						Net Increase (Decrease)			Change Attributable To						Net Increase (Decrease)
(Dollars in thousands)	Volume			Rate						Volume			Rate
Earning assets:
Loans receivable:
Commercial loans (TE)	$	14,371		$	(5,984	)	$	8,387		$	33,179		$	(22,733	)	$	10,446
Mortgage loans		7,317			174			7,491			12,214			(1,644	)		10,570
Consumer and other loans		5,498			3,435			8,933			11,183			(1,419	)		9,764
Loans held for sale		459			(154	)		305			(591	)		579			(12	)
Investment securities (TE)		86			1,422			1,508			372			5,216			5,588
FDIC loss share receivable		15,948			(18,193	)		(2,245	)		50,950			(43,636	)		7,314
Other earning assets		441			(165	)		276			395			(551	)		(156	)
Net change in income on earning assets		44,120			(19,465	)		24,655			107,702			(64,188	)		43,514
Interest-bearing liabilities:
Deposits:
NOW accounts		(23	)		(340	)		(363	)		(399	)		(957	)		(1,356	)
Savings and money market accounts		603			382			985			1,269			(1,025	)		244
Certificates of deposit		286			(231	)		55			(1,256	)		(1,689	)		(2,945	)
Borrowings		890			(501	)		389			367			(417	)		(50	)
Net change in expense on interest-bearing liabilities		1,756			(690	)		1,066			(19	)		(4,088	)		(4,107	)
Change in net interest spread	$	42,364		$	(18,775	)	$	23,589		$	107,721		$	(60,100	)	$	47,621

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

The increase in yield on total earning assets between the first three quarters of 2014 and 2013 was driven by a shift in earning asset mix from lower-yielding earning assets, namely cash and equity securities, into higher-yielding investments, including loans and investment securities. Average loans and investment securities were 95.2% of total earning assets during the first three quarters of 2014 compared to 92.5% for the same period in 2013. Other earning assets, consisting primarily of interest-bearing cash, decreased from 3.6% of earning assets in the first nine months of 2013 to 2.7% in the first three quarters of 2014.

For the nine months ended September 30, 2014, average balance increases in the largest components of earning assets offset loan rate decreases. Average loan balances increased $1.4 billion, or 16.4%, over the first three quarters of 2013 and can be attributed to the non-covered loan growth over the past 12 months. Interest income growth was slowed in the current year by a decrease in the yield on the Company’s non-covered loan portfolio of six basis points to 4.35%. Additionally, covered loan yields decreased 50 basis points from the first three quarters of 2013. 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. The total yield of the loan portfolio for the first nine months of 2014 when including the loss share receivable was 4.26%, four basis points lower than in the same period of 2013. This decrease in yield partially offset the income earned from loan volume increases over the prior year.

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Interest income growth in the current year was positively impacted by a 28 basis point increase in the yield on investment securities and a $54.9 million increase in average year-to-date balance.

Interest expense increased $1.1 million or 9.6%, from the third quarter of 2013, and decreased $4.1 million, or 11.3%, from the nine-month period of 2013. The increase in interest expense during the current quarter was a result of a $1.5 billion, or 16.5%, increase in average interest-bearing liabilities, as the rate paid on interest-bearing liabilities decreased three basis points. For the first nine months of 2014, interest expense was driven lower by an eight basis point reduction in rate despite an average balance increase of $469.8 million.

As a result of acquired Teche, First Private, and Trust One-Memphis deposits, as well as organic deposit growth during the period, average interest-bearing deposits increased $776.0 million, or 9.3%, from the average in the third quarter of 2013, driving the $0.7 million, or 7.9%, increase in interest expense. For the year-to-date period, an average balance decrease of $29.0 million, combined with a decline of six basis points in the average rate paid on deposits, lowered interest expense on deposits 14.6%, or $4.1 million, from the nine-month period ending September 30, 2013. Higher-yielding time deposits across many markets either matured or were repriced during the past 12 months, driving the expense and rate decreases.

Total interest expense on the Company’s short-term and long-term borrowings decreased $0.1 million, or less than 1%, from the first nine months of 2013, as a 15 basis point decrease in the rate paid on long-term debt and a $13.9 million decrease in average long-term borrowings was offset by a $512.7 million, or 175.3%, increase in average short-term debt and a one basis point increase in the rate paid on short-term borrowings.

Provision for Loan Losses

Management of the Company assesses the allowance for credit losses monthly and will make provisions for credit losses 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 for credit losses may also result from credit quality changes associated with acquired loans.

On a consolidated basis, the Company recorded a provision for loan losses of $12.6 million for the nine months ended September 30, 2014 (which includes a provision of $5.7 million in the third quarter of the current year), a $12.1 million increase from the provision of $0.5 million recorded for the same period of 2013. The Company also recorded a provision for unfunded lending commitments of $0.9 million during the current year, which is 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 $13.5 million in the first nine months of 2014, $10.9 million above the total provision for credit losses recorded for the same period of 2013. The Company’s total provision during the first nine months of 2014 included a provision for changes in expected cash flows on the acquired loan portfolios (covered and non-covered) of $3.5 million and a $10.0 million provision recorded on non-acquired loans, based primarily on loan growth. The total provision was limited in 2014 and 2013 by an improvement in legacy portfolio asset quality, as multi-year net charge-off trends in this portfolio continued to show signs of improvement.

Non-covered loans past due totaled $101.2 million at September 30, 2014, a decrease of $8.1 million from December 31, 2013. Past due loans, including non-accrual loans, were 0.96% of total loans (before acquired loan discount adjustments) at the end of the third quarter of 2014, a 29 basis point decrease from December 31, 2013. Excluding the acquired loans, loans past due were 0.55% of total loans at September 30, 2014, an improvement of 25 basis points from December 31, 2013.

Excluding loan pool closures, net charge-offs on the consolidated portfolio were $3.8 million year-to-date, for a net charge-off percentage of 0.05%, one basis points above the 0.04% in the first three quarters of 2013. The net charge-offs thus far in 2014 were a result of $8.6 million in charge-offs and $4.7 million in recoveries.

The Company believes the allowance was appropriate at September 30, 2014 and December 31, 2013 to cover probable credit losses inherent in the loan portfolio. The allowance for loan losses as a percentage of outstanding loans, net of unearned income, decreased 30 basis points from 1.51% at December 31, 2013 to 1.21% at September 30, 2014.

Excluding acquired loans, the Company’s allowance for the non-covered portfolio was 0.79% of non-covered loans at September 30, 2014 and 0.81% at December 31, 2013. On the same basis, the Company’s allowance at September 30, 2014 was 190.6% of total non-performing loans, compared to 150.4% of total non-performing loans at the end of 2013.

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Non-interest Income

The Company’s operating results for the third quarter of 2014 included non-interest income of $45.7 million compared to $43.3 million for the same period of 2013. The increase in non-interest income from 2013 came from a number of non-interest revenue streams, including broker commission income, service charges, and ATM/debit card fee income. However, on a year-to-date basis, non-interest income decreased $0.9 million, or 0.7%, from the corresponding 2013 period, due mainly to decreases in mortgage income, gain on sale of investments, and title revenue, although those decreases were partially offset by increases in broker commission income, income from bank-owned life insurance and service charges.

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 wealth management, trust, and brokerage businesses in order to increase non-interest income. Non-interest income as a percentage of total gross revenue (defined as total interest income and non-interest income) in the third quarter of 2014 was 25.5% compared to 28.5% of total gross revenue in the prior year. Excluding mortgage income, other non-interest income for the three months ended September 30, 2014 was 18.4% of total gross revenue and 18.5% for the same period of 2013.

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

TABLE 21 - NON-INTEREST INCOME

	Three Months Ended September 30,					Percent Increase (Decrease)			Nine Months Ended September 30,					Percent Increase (Decrease)
(Dollars in thousands)	2014			2013					2014			2013
Service charges on deposit accounts	$	10,205		$	7,512		35.8	%	$	25,421		$	21,415		18.7	%
Mortgage income		12,814			15,202		(15.7	)		40,903			51,841		(21.1	)
Title revenue		5,577			5,482		1.7			15,007			16,199		(7.4	)
ATM/debit card fee income		3,287			2,476		32.8			8,691			7,017		23.9
Income from bank-owned life insurance		1,047			908		15.3			4,423			2,747		61.0
Gain on sale of investments, net (1)		582			13		4,343.2			609			2,315		(73.7	)
Broker commission income		5,297			3,950		34.1			14,823			11,347		30.6
(Loss) Gain on sale of assets, net		(24	)		2		(1,237.3	)		(7	)		51		(114.3	)
Trust income		1,476			1,500		(1.6	)		4,426			4,140		6.9
Credit card income		2,659			1,799		47.8			6,271			4,603		36.2
Other income		2,743			4,419		(37.9	)		8,740			8,567		2.0
Total non-interest income	$	45,663		$	43,263		5.5	%	$	129,307		$	130,242		(0.7	)%

⁽¹⁾  Net gains on sale of investments include gains on calls of held to maturity securities of $16,000 for the three months ended September 30, 2013 and $56,000 for the nine months ended September 30, 2013.

Service charges on deposit accounts increased $2.7 million in the third quarter and $4.0 million for the first nine months of 2014 over the same periods of 2013 due primarily to an increase in service charge fees and NSF charges. Customers increased as a result of the Teche, First Private, and Trust One-Memphis acquisitions, as well as new branch openings over the past 12 months.

In the first nine months of 2014, IMC sales volume decreased $688.8 million, or 35.8%, compared to the same period of 2013 and resulted in a $10.9 million decrease in mortgage income from the nine months ended September 30, 2013. The decrease in sales volume from the first nine months of 2013 was partially offset by higher margin on sales.

Title income increased $0.1 million from the third quarter of 2013 and decreased $1.2 million on a year-to-date basis when compared to the same period of 2013 as a result of slower activity fueled by rising mortgage interest rates.

ATM/debit card fee income increased $0.8 million in the third quarter of 2014 and $1.7 million from the first three quarters of 2013, primarily due to an increase in interchange fee income from increases in transaction volume from an expanded cardholder base and usage by customers.

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On July 31, 2013, the U.S. District Court for the District of Columbia issued a ruling in NACS v. Board of Governors of the Federal Reserve System, vacating the Federal Reserve’s Final Rule on Debit Card and Interchange Fees and Routing (the “Interchange Fee Rule”). Retail merchants and merchant groups challenged the Interchange Fee Rule, which had allowed debit card issuers to recover from merchants an interchange fee of $.21 per transaction, a fee of five basis points of the value of the transaction and an additional $0.01 fraud prevention adjustment. The district court held that this fee structure, and the Interchange Fee Rule’s requirements regarding the number of networks over which each debit card transaction can be processed, did not comply with the Durbin Amendment to the Dodd-Frank Act. The Federal Reserve appealed. On March 21, 2014, the Court of Appeals for the D.C. Circuit issued its opinion overturning the district court’s decision and largely reinstating the Interchange Fee Rule. The ultimate financial impact on the Company cannot be determined at this time and the Company continues to monitor this litigation.

Income from bank owned life insurance for the third quarter of 2014 remained relatively flat compared to the same quarter of 2013, consistent with market performance and current yields. On a year-to-date basis, income from bank owned life insurance policies increased $1.7 million compared to the first three quarters of 2013, a result of $1.5 million in non-operating income from two policies that paid death benefits during the first quarter of 2014. Excluding $15.5 million in acquired policies, there have been no significant investments in bank owned life insurance over the past 12 months.

There were minimal gains recorded on investment security sales in the third quarter 2013, but in the third quarter of 2014, the Company recorded $0.6 million in gains on sales activity. On a year-to-date basis, security gains decreased $1.7 million primarily due to changes in sales volume. Gains were recorded on the sale of $19.9 million and $42.4 million in available-for-sale securities for the first three quarters of 2014 and 2013, respectively.

The Company’s wealth management subsidiaries had successful revenue growth during the third quarter and first nine months of 2014, as total broker commissions increased $1.3 million and $3.5 million on a quarter-to-date and year-to-date basis, respectively, compared to the same periods of 2013, a result of the Company’s expanded client base and service offering. The Company’s other wealth management income, which includes research income, syndicate deals, and investment banking management and underwriting fees, increased $1.9 million, or 56.3%, from the first nine months of 2013, while sales and trade commissions increased $1.6 million, or 19.8%.

The Company’s trust and credit card income were both positively impacted by the Company’s increased customer base and growth of the businesses over 2013. Trust income increased $0.3 million for the first three quarters of 2014, while credit card income increased $0.9 million over the third quarter of 2013 and $1.7 million on a year-to-date basis.

Other non-interest income decreased $1.7 million from the third quarter of 2013, a result of lower commission income earned on the Company’s customer derivatives. For the first three quarters of 2014, other non-interest income increased $0.2 million from the corresponding period of 2013. The increase was a result of additional ATM/Debit card income, but was limited due to a decrease in income earned on COLI assets between the two periods.

Non-interest Expense

The Company’s results for the first nine months of 2014 included non-interest expenses of $354.9 million, $15.5 million lower than non-interest expenses of $370.4 million for the first nine months of 2013. Ongoing attention to expense control is part of the Company’s corporate culture. However, the Company’s continued focus on growth through new branches, acquisitions, product expansion, and operational investments have caused related increases in several components of non-interest expense. The Company currently operates 278 combined offices, an increase of 11 offices from September 30, 2013 after adjusting for closed or consolidated branches and offices.

Compared to the first three quarters of 2013, the most significant drivers of the decrease in non-interest expense were the $31.8 million impairment of the Company’s indemnification assets in 2013, $26.7 million below the impairment recorded thus far in 2014, and the $2.3 million prepayment penalty recorded in the first quarter of 2013 to repay $90.0 million in long-term FHLB advances acquired in prior periods. Excluding these and other non-operating expenses, such as lease terminations, severance, and merger-related expenses, non-interest expense increased $3.4 million, or 1.0%, for the nine months ended September 30, 2014. For the third quarter of 2014, non-interest expenses totaled $120.1 million, an $11.9 million increase from the third quarter of 2013. Increases of $2.3 million in merger-related and severance expenses, $3.2 million in net impairment charges, and $4.8 million in salaries and employee benefits (from an increase of 144 full-time equivalent employees) account for much of the increase from the third quarter of 2013. For the third quarter of 2014, the Company’s tangible efficiency ratio on a tax-equivalent basis was 70.0%, but excluding non-operating income and expenses, the Company’s tax-equivalent tangible efficiency ratio would have been 66.4%, a decrease from 73.0% in the third quarter of 2013. On a year-to-date basis, the Company’s operating efficiency ratio would have been 72.2% excluding non-operating income and expenses, compared to 71.4% on a GAAP basis.

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

TABLE 22 - NON-INTEREST EXPENSE

	Three Months Ended September 30,						Percent Increase (Decrease)			Nine Months Ended September 30,				Percent Increase (Decrease)
(Dollars in thousands)	2014			2013						2014		2013
Salaries and employee benefits	$	64,934		$	59,234			9.6	%	$	193,641		185,578		4.3	%
Net occupancy and equipment		14,883			14,572			2.1			44,977		44,050		2.1
Franchise and shares tax		1,129			911			24.0			3,226		2,986		8.0
Communication and delivery		2,525			2,899			(12.9	)		8,756		9,286		(5.7	)
Marketing and business development		2,624			2,350			11.6			8,886		8,486		4.7
Data processing		5,693			4,837			17.7			21,196		13,093		61.9
Office supplies and printing		688			581			18.4			1,827		2,004		(8.9	)
Amortization of acquisition intangibles		1,493			1,179			26.6			3,954		3,543		11.6
Professional services		4,267			4,156			2.7			13,575		13,675		(0.7	)
Costs of OREO, net		(587	)		(359	)		(63.6	)		1,070		980		9.2
Credit and other loan-related expense		4,569			5,248			(12.9	)		11,208		13,093		(14.4	)
Insurance		3,846			3,125			23.0			10,518		8,408		25.1
Travel and entertainment		2,290			1,912			19.8			6,745		6,199		8.8
Impairment of long-lived assets		4,741			1,319			259.4			5,378		37,750		(85.8	)
Prepayment penalty on FHLB debt		—			—			—			—		2,307		(100.0	)
Other expenses		6,965			6,188			12.6			19,906		18,972		4.9
Total non-interest expense	$	120,060		$	108,152			11.0	%	$	354,863	$	370,410		(4.2	)%

Salaries and employee benefits increased $5.7 million and $8.1 million, respectively, in the third quarter and first nine months of 2014 when compared to the same 2013 periods, primarily the result of an increase in headcount (a function of the addition of Teche and First Private employees) and higher incentives and commissions earned in the current period. The Company had 2,703 full-time equivalent employees at the end of the third quarter of 2014 compared to 2,559 at September 30, 2013. The Company’s results for the nine-month period ended September 30, 2014 include four months of salaries and employee benefits from Teche employees and three months of First Private employees acquired in the second quarter of 2014.

For the third quarter of 2014, total salaries and other employee compensation increased $3.2 million, or 8.2%, from the same period of 2013, while payroll taxes, medical and hospitalization expenses, and other employee benefits increased $0.8 million, or 9.9%. On a year-to-date basis, total salaries and other employee compensation increased $3.5 million, or 3.0%, while total employee benefits decreased $0.5 million, or 2.0%. The increase in compensation is a result of an increase in headcount, as total full-time equivalent employees increased 5.6% from the end of the third quarter of 2013.

Salaries and employee benefits also include commissions and other incentives earned based on revenue production, much of which is tied to mortgage origination volume. In the first three quarters of 2014, total commissions and incentives were $1.1 million, or 3.7%, above those in the first nine months of 2013. Total employee compensation in the current year also included $1.8 million of additional share-based incentive compensation due to additional restricted stock, phantom stock, and option grants over the past 12 months. Employee compensation also includes severance and retention payments, which increased $2.1 million in the first three quarters of 2014 due to the acquisitions completed during the first nine months of 2014.

Net occupancy and equipment expenses were up $0.3 million and $0.9 million, respectively, from the third quarter and first nine months of 2013, primarily due to $2.4 million in write-downs and accelerated depreciation recorded on closed branches during the first three quarters of 2014. Offsetting these non-operating expenses were reductions in depreciation expense for the year-to-date period of $0.7 million as a result of these closed branches. Occupancy and equipment expenses also include repairs and maintenance on branches, utilities, rentals and property taxes. Repairs and maintenance expenses decreased $0.2 million in the current quarter and $0.9 million on a year-to-date basis, while property taxes were down 2.3% compared to the first nine months of 2013.

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Despite the growth of the Company over the past 12 months, professional services expenses thus far in 2014 were $0.1 million lower than in the first three quarters of 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. However, in the current year, consulting expenses decreased $2.4 million as the Company engaged consultants in 2013 to address risk mitigation and improve the operational efficiency of the Company. The Company’s efforts to improve various Company and business-line specific processes accounted for most of the consulting expenses in the first three quarters of 2013. The Company has seen the benefits of these improvements in 2014 and expects to see additional improvements in future periods. In addition, examination and audit expenses were $0.7 million below the first three quarters of 2013. Partially offsetting lower consulting and examination expenses was a $2.4 million increase in merger-related professional expenses, as the Company incurred legal, audit, and consulting expenses from the Trust One-Memphis, Teche, and First Private acquisitions.

For the nine months ended September 30, 2014, net costs of OREO properties increased $0.1 million from the corresponding 2013 period, a result of $2.0 million in lower gains on sales of these properties. In addition, legal, appraisal, and other OREO expenses increased $0.3 million, or 14.5%, from the first nine months of 2013, primarily from higher insurance costs. Offsetting these net increases were decreases in write-downs taken on OREO properties of $2.1 million, or 53.4%. With a lower average OREO balance during 2014, property taxes paid on OREO decreased $0.1 million, or 21.6%.

Credit and loan-related expenses decreased $0.7 million and $1.9 million from the third quarter and first nine months of 2013, respectively, as a result of the general improvement in asset quality between periods. Credit and loan-related expenses include the provision recorded on the Company’s unfunded lending commitments of $1.0 million thus far in 2014 and $2.1 million for the first nine months of 2013. Excluding this provision, credit and loan-related expenses would have decreased $0.7 million, or 6.4%, on a year-to-date basis, and increased $0.1 million, or 3.1%, on a quarter-to-date basis. Total expenses incurred for underwriting, certification, and collections have decreased as the number of problem credits has decreased.

Insurance expenses increased $0.7 million and $2.1 million on a quarter-to-date and year-to-date basis, respectively, when compared to the corresponding periods of 2013, primarily as a result of higher deposit insurance in the current period. The increase in deposit insurance was a result of an increase in customer deposits and the assessment base used by the FDIC to calculate deposit insurance, and not the result of a significant change in assessment rate based on a change in bank soundness. The increase in assessment base stems primarily from a change in the Company’s mix of assets and liabilities, namely an increase in outstanding short-term FHLB advances, and not as a result of a significant decrease in asset quality. As the Company’s deposit base grew 6.4% on average (13.9% on a quarter-to-date basis), the Company’s assessment of deposit insurance from the FDIC increased. Despite the increased Company footprint, property, casualty, and other non-deposit insurance expenses have increased only $0.1 million, or 6.9%, from 2013.

Excluding merger-related travel expenses of $0.2 million for the third quarter of 2014 and $0.5 million for the first nine months of 2014, there was no significant change in travel and entertainment expenses compared to the third quarter and first nine months of 2013, as the Company continues to leverage technology to limit the amount of business travel required to conduct its business, despite the expansion of its branch network, number of locations, and general increases in mileage, lodging, and flight costs.

Other non-interest expenses thus far in 2014 were up $0.9 million from the first nine months of 2013 and $0.8 million on a quarter-to-date basis, primarily the result of increases in fees charged to the Company’s wealth management business, deposit and other losses, and mortgage loan repurchase charges.

Income Taxes

For the nine months ended September 30, 2014 and 2013, the Company recorded income tax expense of $25.6 million and $6.7 million, respectively, which resulted in an effective income tax rate of 26.6% in the first three quarters of 2014 and 14.5% for the same period of 2013. Ordinarily, the difference between the effective tax rate and the statutory federal and state tax rates primarily relates to variances in items that are non-taxable or non-deductible, which for the Company primarily includes the effect of tax-exempt income, the non-deductibility of a portion of the amortization recorded on acquisition intangibles, and various tax credits. For the first three quarters of 2013, the Company’s income tax rate was positively affected by the impairment of the FDIC loss share receivable and the prepayment penalty recorded on the repayment of FHLB debt, discussed further in the “Executive Overview” section. As a result of these charges, the Company’s annualized income before taxes, and by extension its taxable income, was lower than in the first three quarters of 2014. The full benefit of these discrete items, $13.8 million, was the primary driver of the lower effective income tax rate recorded in the first three quarters of 2013 and partially offset the income tax expense recorded on the Company’s pre-tax income at its annualized effective tax rate excluding these charges. IBERIABANK’s effective federal tax rate excluding these charges was 31.6% for the first three quarters of 2014, compared to 29.7% for the same period of 2013. On a consolidated basis, the effective tax rate excluding these charges was 26.8% in the first nine months of 2014 and 24.0% in the same period of 2013.

The consolidated effective tax rate in 2014 has also increased when compared to 2013. The difference in the effective tax rates for the periods is primarily the result of the relative tax-exempt interest income levels during the respective periods for each of the Company’s subsidiaries. The tax rate for the current year is higher than in 2013 as a result of higher taxable income, which reduces the effect the Company’s tax-exempt income has on its income tax provision.

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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 September 30, 2014 totaled $1.6 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 security portfolio is classified as available-for-sale, which provides the ability to liquidate unencumbered securities as needed. Of the $2.2 billion in the investment securities portfolio, $779.0 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 security portfolio, the Company has historically experienced significant cash inflows on a regular basis, which are highly dependent on prepayment speeds and could change materially.

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 September 30, 2014, the Company had $715.7 million of outstanding FHLB advances, $553.0 million of which was short-term and $162.7 million was long-term. The Company had $2.5 billion in additional FHLB advances available at September 30, 2014. At September 30, 2014, IBERIABANK also had a $25.0 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 $130.0 million in the form of fed funds and other lines of credit. At September 30, 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 September 30, 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.

Net cash inflows totaled $276.6 million during the first nine months of 2014, an increase of $694.1 million from net cash outflows of $417.5 million during the nine months ended September 30, 2013. The increase in cash was a result of cash acquired in the three acquisitions in 2014, offset in part by actions by management to deploy excess liquidity and invest in higher yielding earnings assets and manage its balance sheet in an effort to maximize shareholder return.

The following table summarizes the Company’s cash flows for the periods indicated.

TABLE 23 - CASH FLOW ACTIVITY BY TYPE

	Nine Months Ended September 30,
(Dollars in thousands)	2014			2013
Cash flow provided by operations	$	79,785		$	276,270
Cash flow used in investing activities		(339,403	)		(684,947	)
Cash flow provided by (used in) financing activities		536,229			(8,852	)
Net increase (decrease) in cash and cash equivalents	$	276,611		$	(417,529	)

Operating activities for the nine months ended September 30, 2014 generated cash inflow of $79.8 million, which was $196.5 million less than operating cash provided in the same period of 2013. Operating cash flow in the current year was negatively impacted by a $194.9 million decrease in the net proceeds received from activity related to mortgage loans held for sale, but was positively impacted by an increase in net income.

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Cash flow from investing activities increased $345.5 million thus far in 2014 compared to the first three quarters of 2013, primarily driven by a $150.4 million increase in net cash flow from investment security activity as a result of fewer security purchases in the current year. Investing cash activity was also positively impacted in the current year by $188.8 million in net cash received from the Trust One-Memphis, Teche, and First Private acquisitions. Cash used to fund loan growth decreased $119.0 million, which also had a positive impact on cash flow, but investing cash activity in 2014 was negatively affected by a decrease of $56.8 million in reimbursements from the FDIC.

Net cash provided by financing activities of $536.2 million thus far in 2014 was $545.1 million more than the same nine-month period of 2013, primarily due to $121.5 million increase in net cash provided from additional short-term borrowings and a $125.1 million decrease in cash used to repay long-term debt. In addition, an increase in customer deposits of $498.0 million (net of deposits acquired) in the first three quarters of 2014 was $295.0 million more than deposit growth for the same nine-month period of 2013. The Company also saw an increase in cash flow from stock options exercised, which contributed to the overall improvement in cash from financing activities.

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 unused commitments are expected to expire unused or be only partially used; therefore, the total amount of unused 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 September 30, 2014, the Company’s approved loan commitments outstanding totaled $242.1 million. At the same date, commitments under unused lines of credit, including credit card lines, amounted to $3.8 billion.

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 Liability Committee (“ALCO”) Senior Management Planning Committee. The Senior Management Planning 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 Senior Management Planning 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.

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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 September 30, 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 24 - CHANGE IN NET INTEREST INCOME FROM INTEREST RATE CHANGES

Shift in Interest Rates (in bps)	% Change in Projected Net Interest Income
+ 200		9.8	%
+ 100		4.9	%
- 100		(2.0	)%
- 200		(4.6	)%

The influence of using the forward curve as of September 30, 2014 as a basis for projecting the interest rate environment would approximate a 1.0% 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. 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 FRB purchases and sales and also expectations of inflation and monetary policy going forward. In response to growing concerns about the banking industry and customer liquidity, the federal funds rate decreased seven times 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 is expected to remain at that rate through at least late 2014. The Company’s commercial loan portfolio is also impacted by fluctuations in the level of the London Interbank Borrowing Offered Rate (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 25 - REPRICING OF CERTAIN EARNING ASSETS

(Dollars in thousands)	4Q 2014		1Q 2015		2Q 2015		3Q 2015		Total less than one year
Investment securities	$	68,578	$	60,861	$	77,092	$	84,079	$	290,610
Covered loans		201,556		70,156		55,108		48,953		375,773
Non-covered loans:
Fixed rate loans		177,266		131,573		143,514		164,624		616,977
Variable rate loans		4,744,095		24,096		28,951		27,858		4,825,000
Total non-covered loans		4,921,361		155,669		172,465		192,482		5,441,977
Total loans		5,122,917		225,825		227,573		241,435		5,817,750
	$	5,191,495	$	286,686	$	304,665	$	325,514	$	6,108,360

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 and/or 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 September 30, 2014, $5.5 billion, or 49.6%, of the Company’s total loan portfolio had adjustable interest rates. IBERIABANK had no significant concentration to any single borrower or industry segment at September 30, 2014.

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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 the end of the third quarter of 2014, 83.0% of the Company’s deposits were in transaction and limited-transaction accounts, compared to 84.1% at December 31, 2013. Non-interest-bearing transaction accounts were 25.5% of total deposits at September 30, 2014, compared to 24.0% 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.

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

TABLE 26 – REPRICING OF LIABILITIES

(Dollars in thousands)	4Q 2014		1Q 2015		2Q 2015		3Q 2015		Total less than one year
Time deposits	$	702,811		314,196		321,858		246,357	$	1,585,222
Short-term borrowings		507,783		180,000		125,000		—		812,783
Long-term debt		126,499		2,098		10,078		3,251		141,926
	$	1,337,093	$	496,294	$	456,936	$	249,608	$	2,539,931

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 were executed to 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 2014.

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Item 3. Quantitative and Qualitative Disclosures About Market Risk

Quantitative and qualitative disclosures about market risk are presented at December 31, 2013 in Part II, Item 7A of the Company’s Annual Report on Form 10-K, filed with the Securities and Exchange Commission on February 28, 2014. Additional information at September 30, 2014 is included herein under Item 2, “Management’s Discussion and Analysis of Financial Condition and Results of Operations”.

Item 4. Controls and Procedures

An evaluation of the effectiveness of the Company’s disclosure controls and procedures as of September 30, 2014 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 the Company’s disclosure controls and procedures are effective in alerting them in a timely manner to material information required to be disclosed by the Company in reports that it files or submits under the Securities Exchange Act of 1934 (the “Exchange Act”).

Disclosure controls and procedures are designed to ensure that information required to be disclosed in reports filed by the Company under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms. Disclosure controls are also designed with the objective of ensuring that such information is accumulated and communicated to the Company’s management, including the CEO and the CFO, as appropriate, to allow timely decisions regarding required disclosures. Disclosure controls include review of internal controls that are designed to provide reasonable assurance that transactions are properly authorized, assets are safeguarded against unauthorized or improper use and transactions are properly recorded and reported. There was no significant change in the Company’s internal controls over financial reporting during the last fiscal quarter that has materially affected, or is reasonably likely to materially affect, the internal control over financial reporting.

Any control system, no matter how well conceived and operated, can provide only reasonable assurance that its objectives are achieved. The design of a control system inherently has limitations, including the controls’ cost relative to their benefits. Additionally, controls can be circumvented. No cost-effective control system can provide absolute assurance that all control issues and instances of fraud, if any, will be detected.

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PART II. OTHER INFORMATION

Item 1.    Legal Proceedings

See Note 16 – Commitments and Contingencies of Notes to the Unaudited Consolidated Financial Statements which is incorporated herein by reference.

Item 1A. Risk Factors

The following risk factor contains information concerning factors that could materially affect the Company’s business’ financial condition or future results. The risk factor that is described below and those that are discussed in Item 1A to Part 1 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2013 should be considered carefully in evaluating the Company’s overall risk profile. Additional risks not presently known, or that we currently deem immaterial, also may have a material adverse affect on the Company’s business, financial condition or results of operations.

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 September 30, 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.

Item 2.    Unregistered Sales of Equity Securities and Use of Proceeds

Not Applicable.

Item 3.    Defaults Upon Senior Securities

Not Applicable.

Item 4.    Mine Safety Disclosures

Not Applicable.

Item 5.    Other Information

None.

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Item 6.     Exhibits

Exhibit No.	31.1	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
Exhibit No.	31.2	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
Exhibit No.	32.1	Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
Exhibit No.	32.2	Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
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.

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SIGNATURES

Pursuant to the requirements 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: November 10, 2014	By:	/s/ Daryl G. Byrd
	Daryl G. Byrd
	President and Chief Executive Officer
Date: November 10, 2014	By:	/s/ Anthony J. Restel
	Anthony J. Restel
	Senior Executive Vice President and Chief Financial Officer

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 quarterly report on Form 10-Q 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 the 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 officer(s) 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: November 10, 2014	/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 quarterly report on Form 10-Q 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 the 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 officer(s) 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: November 10, 2014	/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 Quarterly Report of IBERIABANK Corporation (the “Company”) on Form 10-Q for the period ended September 30, 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

November 10, 2014

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 Quarterly Report of IBERIABANK Corporation (the “Company”) on Form 10-Q for the period ended September 30, 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

November 10, 2014

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.

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Shareholders' Equity and Other Comprehensive Income (Loss) (Tables)

9 Months Ended

Sep. 30, 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 periods indicated:

	Three Months Ended
	September 30, 2014
	Before			Tax Expense		Net-of-Tax
(Dollars in thousands)	Tax			(Benefit)		Amount
Unrealized gain on securities:
Unrealized holding losses arising during the period	$	(7,032	)	$	2,461	$	(4,571	)
Less: reclassification adjustment for gains included in net income		(582	)		204		(378	)
Net unrealized losses		(7,614	)		2,665		(4,949	)
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	$	—		$	—	$	—
Less: reclassification adjustment for losses (gains) included in net income		—			—		—
Fair value of derivative instruments designated as cash flow hedges		—			—		—
Total other comprehensive loss	$	(7,614	)	$	2,665	$	(4,949	)

	Three Months Ended
	September 30, 2013
	Before		Tax Expense			Net-of-Tax
(Dollars in thousands)	Tax		(Benefit)			Amount
Unrealized gain on securities:
Unrealized holding gains arising during the period	$	5,528	$	(1,935	)	$	3,593
Less: reclassification adjustment for losses included in net income		3		(1	)		2
Net unrealized losses		5,531		(1,936	)		3,595
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	$	—	$	—		$	—
Less: reclassification adjustment for gains included in net income		—		—			—
Fair value of derivative instruments designated as cash flow hedges		—		—			—
Total other comprehensive income	$	5,531	$	(1,936	)	$	3,595

	Nine Months Ended
	September 30, 2014
	Before			Tax Expense			Net-of-Tax
(Dollars in thousands)	Tax			(Benefit)			Amount
Unrealized loss on securities:
Unrealized holding gains arising during the period	$	25,586		$	(8,955	)	$	16,631
Less: reclassification adjustment for gains included in net income		(609	)		213			(396	)
Net unrealized gains		24,977			(8,742	)		16,235
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	$	—		$	—		$	—
Less: reclassification adjustment for losses (gains) included in net income		—			—			—
Fair value of derivative instruments designated as cash flow hedges		—			—			—
Total other comprehensive income	$	24,977		$	(8,742	)	$	16,235
	Nine Months Ended
	September 30, 2013
	Before			Tax Expense			Net-of-Tax
(Dollars in thousands)	Tax			(Benefit)			Amount
Unrealized gain on securities:
Unrealized holding losses arising during the period	$	(38,769	)	$	13,569		$	(25,200	)
Less: reclassification adjustment for gains included in net income		(2,259	)		791			(1,468	)
Net unrealized losses		(41,028	)		14,360			(26,668	)
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	$	952		$	(333	)	$	619
Less: reclassification adjustment for losses included in net income		392			(137	)		255
Fair value of derivative instruments designated as cash flow hedges		1,344			(470	)		874
Total other comprehensive loss	$	(39,684	)	$	13,890		$	(25,794	)

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Business Segments - Schedule of Segment Reporting Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Segment Reporting Information [Line Items]
Interest income	$ 133,167	$ 108,512	$ 366,619	$ 323,105
Interest expense	12,126	11,060	32,192	36,299
Net interest income	121,041	97,452	334,427	286,806
Provision for loan losses	5,714	2,014	12,565	445
Mortgage income	12,814	15,202	40,903	51,841
Title income	5,577	5,482	15,007	16,199
Other non-interest income	27,272	22,579	73,397	62,202
Core deposit intangible amortization	1,429	1,125	3,779	3,375
Other non-interest expenses	118,631	107,027	351,084	367,035
Income before income tax expense	40,930	30,549	96,306	46,193
Income tax expense (benefit)	11,186	7,357	25,619	6,694
Net income (loss)	29,744	23,192	70,687	39,499
Total loans and loans held for sale	11,227,729	9,151,322	11,227,729	9,151,322
Total assets	15,516,609	13,145,077	15,516,609	13,145,077	13,365,550
Total deposits	12,377,775	10,950,764	12,377,775	10,950,764	10,737,000
Average assets	15,478,406	12,944,435	14,302,151	12,966,519
IBERIABANK [Member]
Segment Reporting Information [Line Items]
Interest income	131,362	107,051	362,054	318,646
Interest expense	11,501	10,731	30,869	34,786
Net interest income	119,861	96,320	331,185	283,860
Provision for loan losses	5,621	1,868	12,481	320
Mortgage income	(5)	5	80	2
Other non-interest income	27,311	22,579	73,460	62,206
Core deposit intangible amortization	1,429	1,125	3,779	3,375
Allocated expenses	(2,386)	(2,658)	(9,110)	(4,402)
Other non-interest expenses	102,692	90,858	305,121	315,332
Income before income tax expense	39,811	27,711	92,454	31,443
Income tax expense (benefit)	10,739	6,228	24,081	884
Net income (loss)	29,072	21,483	68,373	30,559
Total loans and loans held for sale	11,055,809	9,024,959	11,055,809	9,024,959
Total assets	15,288,157	12,965,373	15,288,157	12,965,373
Total deposits	12,371,606	10,946,453	12,371,606	10,946,453
Average assets	15,239,174	12,761,165	14,097,930	12,747,602
IMC [Member]
Segment Reporting Information [Line Items]
Interest income	1,804	1,459	4,563	4,428
Interest expense	625	329	1,323	1,513
Net interest income	1,179	1,130	3,240	2,915
Provision for loan losses	93	146	84	125
Mortgage income	12,819	15,197	40,823	51,839
Other non-interest income	(37)		(61)	(4)
Allocated expenses	1,697	1,933	6,432	3,213
Other non-interest expenses	11,624	12,016	33,558	38,942
Income before income tax expense	547	2,232	3,928	12,470
Income tax expense (benefit)	217	877	1,552	4,897
Net income (loss)	330	1,355	2,376	7,573
Total loans and loans held for sale	171,920	126,363	171,920	126,363
Total assets	202,923	153,402	202,923	153,402
Total deposits	6,169	4,311	6,169	4,311
Average assets	213,936	157,144	179,218	193,463
LTC [Member]
Segment Reporting Information [Line Items]
Interest income	1	2	2	31
Net interest income	1	2	2	31
Title income	5,577	5,482	15,007	16,199
Other non-interest income	(2)		(2)
Allocated expenses	689	725	2,678	1,189
Other non-interest expenses	4,315	4,153	12,405	12,761
Income before income tax expense	572	606	(76)	2,280
Income tax expense (benefit)	230	252	(14)	913
Net income (loss)	342	354	(62)	1,367
Total assets	25,529	26,302	25,529	26,302
Average assets	$ 25,296	$ 26,126	$ 25,003	$ 25,454

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Acquisition Activity - Schedule of Business Acquisitions, by Acquisition (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014
As Acquired [Member] | Teche [Member]
Business Acquisition [Line Items]
Cash and cash equivalents	$ 71,611
Investment securities	24,077
Loans	716,196
Other real estate owned	329
Core deposit intangible
Deferred tax asset (liability)	1,057
Other assets	56,752
Total Assets	870,022
Interest-bearing deposits	520,446
Non-interest-bearing deposits	118,256
Borrowings	134,228
Other liabilities	5,366
Total Liabilities	778,296
As Acquired [Member] | First Private [Member]
Business Acquisition [Line Items]
Cash and cash equivalents	26,621
Investment securities	18,920
Loans	295,736
Other real estate owned
Core deposit intangible
Deferred tax asset (liability)	530
Other assets	5,230
Total Assets	347,037
Interest-bearing deposits	261,713
Non-interest-bearing deposits	50,333
Borrowings	6,451
Other liabilities	306
Total Liabilities	318,803
As Acquired [Member] | Trust One- Memphis [Member]
Business Acquisition [Line Items]
Cash and cash equivalents	92,060
Loans	88,179
Other real estate owned	1,325
Core deposit intangible
Other assets	368
Total Assets	181,932
Interest-bearing deposits	164,942
Non-interest-bearing deposits	26,373
Deferred tax liability
Other liabilities	84
Total Liabilities	191,399
Preliminary Fair Value Adjustments [Member] | Teche [Member]
Business Acquisition [Line Items]
Cash and cash equivalents
Investment securities	1,092
Loans	(16,636)
Other real estate owned	(153)
Core deposit intangible	2,055
Deferred tax asset (liability)	7,337
Other assets	(6,261)
Total Assets	(12,566)
Interest-bearing deposits	902
Non-interest-bearing deposits
Borrowings	6,304
Other liabilities
Total Liabilities	7,206
Preliminary Fair Value Adjustments [Member] | First Private [Member]
Business Acquisition [Line Items]
Cash and cash equivalents
Investment securities	297
Loans	(910)
Other real estate owned
Core deposit intangible	506
Deferred tax asset (liability)	122
Other assets
Total Assets	15
Interest-bearing deposits	220
Non-interest-bearing deposits
Borrowings
Other liabilities
Total Liabilities	220
Preliminary Fair Value Adjustments [Member] | Trust One- Memphis [Member]
Business Acquisition [Line Items]
Cash and cash equivalents
Loans	(1,726)
Other real estate owned
Core deposit intangible	2,597
Other assets
Total Assets	871
Interest-bearing deposits
Non-interest-bearing deposits
Deferred tax liability
Other liabilities
Total Liabilities
As Recorded by IBERIABANK [Member] | Teche [Member]
Business Acquisition [Line Items]
Cash and cash equivalents	71,611
Investment securities	25,169
Loans	699,560
Other real estate owned	176
Core deposit intangible	2,055
Deferred tax asset (liability)	8,394
Other assets	50,491
Total Assets	857,456
Interest-bearing deposits	521,348
Non-interest-bearing deposits	118,256
Borrowings	140,532
Other liabilities	5,366
Total Liabilities	785,502
As Recorded by IBERIABANK [Member] | First Private [Member]
Business Acquisition [Line Items]
Cash and cash equivalents	26,621
Investment securities	19,217
Loans	294,826
Other real estate owned
Core deposit intangible	506
Deferred tax asset (liability)	652
Other assets	5,230
Total Assets	347,052
Interest-bearing deposits	261,933
Non-interest-bearing deposits	50,333
Borrowings	6,451
Other liabilities	306
Total Liabilities	319,023
As Recorded by IBERIABANK [Member] | Trust One- Memphis [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
Other liabilities	84
Total Liabilities	$ 191,399

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Earnings Per Share - Schedule of Calculation of Basic and Diluted Earnings Per Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Earnings Per Share, Basic And Diluted, By Common Class, Including Two Class Method [Line Items]
Income available to common shareholders	$ 29,744	$ 23,192	$ 70,687	$ 39,499
Distributed earnings (capital) to common shareholders-basic	29,300	22,771	69,553	38,755
Distributed and undistributed earnings to common shareholders-diluted	29,296	22,767	69,528	38,755
Weighted average shares outstanding-basic	33,309,881	29,631,799	31,316,267	29,582,081
Weighted average shares outstanding-diluted	32,926,969	29,147,232	30,923,050	29,062,238
Earnings per common share - Basic	$ 0.89	$ 0.78	$ 2.26	$ 1.34
Earnings per common share - Diluted	$ 0.89	$ 0.78	$ 2.25	$ 1.33
Unvested Restricted Stock [Member]
Earnings Per Share, Basic And Diluted, By Common Class, Including Two Class Method [Line Items]
Distributed earnings (capital) to unvested restricted stock	(444)	(421)	(1,134)	(744)
Undistributed earnings reallocated to unvested restricted stock	$ (4)	$ (4)	$ (25)
Earnings per common share - Basic	$ 0.88	$ 0.77	$ 2.16	$ 1.33
Earnings per common share - Diluted	$ 0.89	$ 0.78	$ 2.21	$ 1.33

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Loans Receivable - Summary of Changes in Accretable Yields of Acquired Loans (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at beginning of period	$ 354,892	$ 356,393
Acquisition	9,778
Transfers from nonaccretable difference to accretable yield	17,824	40,628
Accretion	(79,356)	(132,712)
Changes in expected cash flows not affecting nonaccretable differences	(26,250)	91,734
Balance at end of period	276,888	356,043
Acquired Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at beginning of period	78,349	76,623
Acquisition	8,242
Transfers from nonaccretable difference to accretable yield	3,952	6,148
Accretion	(12,766)	(13,519)
Changes in expected cash flows not affecting nonaccretable differences	(6,873)	10,561
Balance at end of period	70,904	79,813
Acquired Performing Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at beginning of period	276,543	279,770
Acquisition	1,536
Transfers from nonaccretable difference to accretable yield	13,872	34,480
Accretion	(66,590)	(119,193)
Changes in expected cash flows not affecting nonaccretable differences	(19,377)	81,173
Balance at end of period	$ 205,984	$ 276,230

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Acquisition Activity - Schedule of Assets Acquired under Business Acquisitions (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Jan. 17, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2014 Title Company LLC [Member]	Feb. 24, 2014 Title Company LLC [Member]	Sep. 30, 2014 Louisiana Abstract and Title Llc [Member]
Business Acquisition [Line Items]
Goodwill	$ 526,242	$ 8,600	$ 401,872	$ 401,872	$ 221	$ 200	$ 155
Non-compete agreement					63		100
Title plant					14		9
Other intangible assets					75		130
Other assets					3		6
Total Assets					$ 376		$ 400

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Loss Sharing Agreements and FDIC Loss Share Receivable - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended
	Mar. 31, 2014	Sep. 30, 2014 Business	Sep. 30, 2013	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		94,700,000
Valuation allowance against indemnification assets	$ 31,800,000	$ (5,097,000)	$ (31,813,000)

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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	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Fair Value Disclosures [Abstract]
Mortgage loans held for sale, at fair value, Aggregate Fair Value	$ 148,530	$ 97,273
Mortgage loans held for sale, at fair value, Aggregate Unpaid Principal	142,381	96,875
Mortgage loans held for sale, at fair value, Aggregate Fair Value Less Unpaid Principal	$ 6,149	$ 398

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Basis of Presentation - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Schedule Of Significant Accounting Policies [Line Items]
Property write-downs	$ 0.5	$ 1.4	$ 1.9	$ 4.0
IBERIABANK Corporation [Member]
Schedule Of Significant Accounting Policies [Line Items]
Number of operating states	6		6
IMC [Member]
Schedule Of Significant Accounting Policies [Line Items]
Number of operating states	12		12

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Allowance for Credit Losses and Credit Quality (Tables)

9 Months Ended

Sep. 30, 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 nine months ended September 30, 2014 and 2013 is as follows:

	September 30, 2014
	Non-covered loans
	Excluding
(Dollars in thousands)	Acquired 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		9,099			(1,259	)		5,878			13,718
Adjustment attributable to FDIC loss share arrangements		—			—			(1,153	)		(1,153	)
Net (reversal of) provision for loan losses		9,099			(1,259	)		4,725			12,565
Adjustment attributable to FDIC loss share arrangements		—			—			1,153			1,153
Transfer of balance to OREO		—			(207	)		(5,171	)		(5,378	)
Loans charged-off		(8,242	)		(586	)		(12,823	)		(21,651	)
Recoveries		4,338			401			38			4,777
Balance at end of period	$	72,537		$	2,906		$	59,097		$	134,540
Reserve for unfunded lending commitments
Balance, beginning of period	$	11,147		$	—		$	—		$	11,147
Provision for unfunded lending commitments		952			—			—			952
Balance at end of period	$	12,099		$	—		$	—		$	12,099
	September 30, 2013
	Non-covered loans
	Excluding
	Acquired 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		2,884			(2,464	)		(58,540	)		(58,120	)
Adjustment attributable to FDIC loss share arrangements		—			—			58,565			58,565
Net (reversal of) provision for loan losses		2,884			(2,464	)		25			445
Adjustment attributable to FDIC loss share arrangements		—			—			(58,565	)		(58,565	)
Transfer of balance to OREO		—			(1,013	)		(29,302	)		(30,315	)
Transfer of balance to the RULC		(9,828	)		—			—			(9,828	)
Loans charged-off		(7,455	)		(10	)		(1,683	)		(9,148	)
Recoveries		4,353			—			—			4,353
Balance at end of period		64,165			5,329		$	79,051		$	148,545
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		2,131			—			—			2,131
Balance at end of period	$	11,959		$	—		$	—		$	11,959

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 nine months ended September 30, 2014 and 2013 is as follows:

	September 30, 2014
	Commercial			Commercial
(Dollars in thousands)	real estate			business			Mortgage			Consumer			Unallocated		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		611			2,187			514			4,528			—		7,840
Transfer of balance to OREO		—			(130	)		(12	)		(65	)		—		(207	)
Loans charged off		(1,214	)		(1,097	)		(607	)		(5,910	)		—		(8,828	)
Recoveries		2,209			93			134			2,303			—		4,739
Balance at end of period	$	28,196		$	29,568		$	2,575		$	15,104		$	—	$	75,443
Reserve for unfunded commitments
Balance at beginning of period	$	3,089		$	4,839		$	72		$	3,147		$	—	$	11,147
(Reversal of) Provision for unfunded commitments		726			192			11			23			—		952
Balance at end of period	$	3,815		$	5,031		$	83		$	3,170		$	—	$	12,099
Allowance on loans individually evaluated for impairment	$	25		$	—		$	—		$	—		$	—	$	25
Allowance on loans collectively evaluated for impairment		28,171			29,568			2,575			15,104			—		75,418
Loans, net of unearned income:
Balance at end of period	$	4,032,419		$	3,193,098		$	938,987		$	2,390,506		$	—	$	10,555,010
Balance at end of period individually evaluated for impairment		7,357			3,276			—			706			—		11,339
Balance at end of period collectively evaluated for impairment		4,025,062			3,189,822			938,987			2,389,800			—		10,543,671
Balance at end of period acquired with deteriorated credit quality		15,061			2,562			160			1,707			—		19,490
	September 30, 2013
	Commercial			Commercial
(Dollars in thousands)	real estate			business			Mortgage			Consumer			Unallocated		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		(6,926	)		(582	)		1,048			6,880			—		420
Transfer of balance to OREO		(279	)		(81	)		(646	)		(7	)		—		(1,013	)
Transfer of balance to the RULC		(2,939	)		(3,497	)		(40	)		(3,352	)		—		(9,828	)
Loans charged off		(1,966	)		(531	)		(481	)		(4,487	)		—		(7,465	)
Recoveries		1,498			354			698			1,803			—		4,353
Balance at end of period	$	27,652		$	24,384		$	2,704		$	14,754		$	—	$	69,494
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		1,207			610			38			276					2,131
Balance at end of period	$	4,146		$	4,107		$	78		$	3,628		$	—	$	11,959
Allowance on loans individually evaluated for impairment	$	8		$	801		$	283		$	—		$	—	$	1,092
Allowance on loans collectively evaluated for impairment		27,644			23,583			2,421			14,754			—		68,402
Loans, net of unearned income:
Balance at end of period	$	3,320,333		$	2,643,822		$	409,940		$	1,861,940		$	—	$	8,236,035
Balance at end of period individually evaluated for impairment		9,529			14,548			1,407			263			—		25,747
Balance at end of period collectively evaluated for impairment		3,310,804			2,629,274			408,533			1,861,677			—		8,210,288
Balance at end of period acquired with deteriorated credit quality		16,287			45			120			1,815			—		18,267

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 nine months ended September 30, 2014 and 2013 is as follows:

	September 30, 2014
	Commercial			Commercial
(Dollars in thousands)	real estate			business			Mortgage			Consumer			Unallocated		Total
Allowance for loan losses
Balance at beginning of period	$	38,772		$	5,380		$	10,889		$	16,134		$	—	$	71,175
Provision for loan losses		2,544			376			971			834			—		4,725
(Decrease) Increase in FDIC loss share receivable		734			609			(2,911	)		2,721			—		1,153
Transfer of balance to OREO		(1,874	)		(1,162	)		(648	)		(1,487	)		—		(5,171	)
Loans charged off		(9,578	)		(2,192	)		(90	)		(963	)		—		(12,823	)
Recoveries		38			—			—			—			—		38
Balance at end of period	$	30,636		$	3,011		$	8,211		$	17,239		$	—	$	59,097
Allowance on loans individually evaluated for impairment	$	—		$	—		$	—		$	—		$	—	$	—
Allowance on loans collectively evaluated for impairment		30,636			3,011			8,211			17,239			—		59,097
Loans, net of unearned income:
Balance at end of period	$	247,156		$	34,234		$	130,976		$	111,823		$	—	$	524,189
Balance at end of period individually evaluated for impairment		—			—			—			—			—		—
Balance at end of period collectively evaluated for impairment		247,156			34,234			130,976			111,823			—		524,189
Balance at end of period acquired with deteriorated credit quality		4,678			620			24,304			16,699			—		46,301
	September 30, 2013
	Commercial			Commercial
(Dollars in thousands)	real estate			business			Mortgage			Consumer			Unallocated		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		27			—			(1	)		(1	)		—		25
(Decrease) Increase in FDIC loss share receivable		(30,853	)		(3,137	)		(5,734	)		(18,841	)		—		(58,565	)
Transfer of balance to OREO		(22,375	)		(314	)		(6,614	)		1			—		(29,302	)
Loans charged off		(1,683	)		—			—			—			—		(1,683	)
Balance at end of period	$	45,987		$	7,924		$	10,217		$	14,923		$	—	$	79,051
Allowance on loans individually evaluated for impairment	$	—		$	—		$	—		$	—		$	—	$	—
Allowance on loans collectively evaluated for impairment		45,987			7,924			10,217			14,923			—		79,051
Loans, net of unearned income:
Balance at end of period	$	459,506		$	40,422		$	153,515		$	153,559		$	—	$	807,002
Balance at end of period individually evaluated for impairment		—			—			—			—			—		—
Balance at end of period collectively evaluated for impairment		459,506			40,422			153,515			153,559			—		807,002
Balance at end of period acquired with deteriorated credit quality		23,751			—			28,333			26,400			—		78,484

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 September 30, 2014 and December 31, 2013.

	Non-covered loans excluding acquired loans
	September 30, 2014										December 31, 2013
			Special										Special
(Dollars in thousands)	Pass		Mention		Substandard		Doubtful		Total		Pass		Mention		Substandard		Doubtful		Total
Commercial real estate construction	$	624,592	$	249	$	11,153	$	—	$	635,994	$	370,824	$	9,309	$	2,962	$	—	$	383,095
Commercial real estate—other		2,817,777		46,718		26,700		423		2,891,618		2,694,161		27,227		30,308		113		2,751,809
Commercial business		3,047,885		23,093		20,921		1,974		3,093,873		2,866,794		6,164		32,167		926		2,906,051
Total	$	6,490,254	$	70,060	$	58,774	$	2,397	$	6,621,485	$	5,931,779	$	42,700	$	65,437	$	1,039	$	6,040,955

	Non-covered loans excluding acquired loans
	September 30, 2014						December 31, 2013
			30+ Days						30+ Days
(Dollars in thousands)	Current		Past Due		Total		Current		Past Due		Total
Residential prime	$	362,513	$	14,181	$	376,694	$	286,167	$	11,640	$	297,807
Residential subprime		114,182		6,199		120,381		114,939		1,626		116,565
Home equity		1,220,704		9,294		1,229,998		1,091,894		9,333		1,101,227
Indirect automobile		390,413		3,665		394,078		370,388		2,995		373,383
Credit card		67,472		1,259		68,731		62,873		769		63,642
Consumer—other		367,102		1,473		368,575		293,693		1,049		294,742
Total	$	2,522,386	$	36,071	$	2,558,457	$	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.

	September 30, 2014							December 31, 2013
			Unpaid							Unpaid
	Recorded		Principal		Related			Recorded		Principal		Related
(Dollars in thousands)	Investment		Balance		Allowance			Investment		Balance		Allowance
With no related allowance recorded:
Commercial real estate	$	6,990	$	6,990	$	—		$	8,567	$	8,567	$	—
Commercial business		3,276		3,276		—			13,256		13,256		—
Home equity		689		689		—			258		258		—
With an allowance recorded:
Commercial real estate		1,450		1,483		(33	)		1,268		1,284		(16	)
Commercial business		186		188		(2	)		1,927		2,770		(843	)
Residential prime		10,746		10,973		(227	)		9,791		10,019		(228	)
Residential subprime		6,169		6,197		(28	)		1,617		1,626		(9	)
Home equity		7,017		7,064		(47	)		6,506		6,550		(44	)
Indirect automobile		1,330		1,338		(8	)		1,267		1,275		(8	)
Credit card		968		987		(19	)		404		411		(7	)
Other		429		433		(4	)		481		485		(4	)
Total	$	39,250	$	39,618	$	(368	)	$	45,342	$	46,501		(1,159	)
Total commercial loans		11,902		11,937		(35	)		25,018		25,877		(859	)
Total mortgage loans		16,915		17,170		(255	)		11,408		11,645		(237	)
Total consumer loans		10,433		10,511		(78	)		8,916		8,979		(63	)

	For the Three Months Ended September 30								For the Nine Months Ended September 30
	2014				2013				2014				2013
	Average		Interest		Average		Interest		Average		Interest		Average		Interest
	Recorded		Income		Recorded		Income		Recorded		Income		Recorded		Income
(Dollars in thousands)	Investment		Recognized		Investment		Recognized		Investment		Recognized		Investment		Recognized
With no related allowance recorded:
Commercial real estate	$	7,026	$	6	$	10,703	$	6	$	7,114	$	20	$	12,787	$	22
Commercial business		3,553		11		13,218		17		4,417		48		8,608		59
Home equity		692		—		265		—		700		14		287		—
With an allowance recorded:
Commercial real estate		1,631		—		4,346		—		1,533		91		6,092		5
Commercial business		312		—		2,739		—		584		9		2,746		3
Residential prime		11,077		—		9,650		—		10,226		119		9,380		7
Residential subprime		6,228		—		—		—		6,115		—		—		—
Home equity		7,177		5		7,244		—		7,404		40		7,458		14
Indirect automobile		1,544		—		1,349		—		1,720		27		1,610		22
Credit card		1,051		—		424		—		724		—		426		—
Other		470		—		372		—		489		11		446		4
Total	$	40,761	$	22	$	50,310	$	23	$	41,026	$	379	$	49,840	$	136
Total commercial loans		12,522		17		31,006		23		13,648		168		30,233		89
Total mortgage loans		17,305		—		9,650		—		16,341		119		9,380		7
Total consumer loans		10,934		5		9,654		—		11,037		92		10,227		40

Covered Loans [Member]

Investment in Covered Loans and Non-Covered Loans by Credit Quality Indicator

	Non-covered acquired loans
	September 30, 2014													December 31, 2013
			Special													Special
(Dollars in thousands)	Pass		Mention		Substandard		Doubtful		Discount			Total		Pass		Mention		Substandard		Doubtful		Discount			Total
Commercial real estate construction	$	30,675	$	3,671	$	4,989	$	—	$	(2,061	)	$	37,274	$	17,132	$	196	$	5,435	$	—	$	(2,532	)	$	20,231
Commercial real estate—other		456,790		11,065		42,027		178		(42,527	)		467,533		310,303		15,351		51,267		93		(52,176	)		324,838
Commercial business		97,383		2,203		4,571		212		(5,144	)		99,225		51,414		1,920		2,586		31		(2,914	)		53,037
Total	$	584,848	$	16,939	$	51,587	$	390	$	(49,732	)	$	604,032	$	378,849	$	17,467	$	59,288	$	124	$	(57,622	)	$	398,106

	Non-covered acquired loans
	September 30, 2014									December 31, 2013
			30+ Days		Premium							30+ Days		Premium
(Dollars in thousands)	Current		Past Due		(discount)			Total		Current		Past Due		(discount)			Total
Residential prime	$	432,837	$	8,444	$	631		$	441,912	$	18,796	$	226	$	(887	)	$	18,135
Home equity		228,051		10,821		(10,803	)		228,069		53,995		5,071		(5,623	)		53,443
Indirect automobile		606		51		(44	)		613		1,725		128		—			1,853
Consumer—other		109,599		2,395		(11,552	)		100,442		12,598		1,251		(1,481	)		12,368
Total	$	771,093	$	21,711	$	(21,768	)	$	771,036	$	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 fair value at the date indicated, as adjusted for income accretion and changes in cash flow estimates in subsequent periods.

	Covered loans
	September 30, 2014											December 31, 2013
			Special											Special
(Dollars in thousands)	Pass		Mention		Substandard		Doubtful		Total			Pass		Mention		Substandard		Doubtful		Total
Commercial real estate construction	$	40,754	$	1,822	$	9,285	$	—	$	51,861		$	42,886	$	7,401	$	23,891	$	497	$	74,675
Commercial real estate—other		113,309		22,277		75,353		—		210,939			148,579		49,699		144,680		3,267		346,225
Commercial business		26,087		887		8,814		46		35,834			30,710		780		14,556		984		47,030
	$	180,150	$	24,986	$	93,452	$	46	$	298,634		$	222,175	$	57,880	$	183,127	$	4,748	$	467,930
Discount										(17,244	)										(43,573	)
Total									$	281,390										$	424,357

	Covered loans
	September 30, 2014									December 31, 2013
			30+ Days		Premium							30+ Days		Premium
(Dollars in thousands)	Current		Past Due		(discount)			Total		Current		Past Due		(discount)			Total
Residential prime	$	143,529	$	23,993	$	(36,546	)	$	130,976	$	158,710	$	30,814	$	(35,499	)	$	154,025
Home equity		115,813		19,403		(27,405	)		107,811		143,236		35,811		(41,925	)		137,122
Credit card		588		33		—			621		648		31		—			679
Consumer—other		498		23		2,870			3,391		591		144		2,875			3,610
Total	$	260,428	$	43,452	$	(61,081	)	$	242,799	$	303,185	$	66,800	$	(74,549	)	$	295,436

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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			9 Months Ended
	Sep. 30, 2014	Mar. 31, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
FDIC Loss Share Receivable [Line Items]
Balance at beginning of period		$ 162,312		$ 162,312
Change due to (reversal of) loan loss provision recorded on FDIC covered loans				1,153	(58,565)
Amortization	(25,120)		(22,875)	(61,393)	(68,707)
Impairment		(31,800)		5,097	31,813
Balance at end of period	94,712			94,712
FDIC Loss Share Receivables [Member]
FDIC Loss Share Receivable [Line Items]
Balance at beginning of period		162,312		162,312	423,069
Change due to (reversal of) loan loss provision recorded on FDIC covered loans				1,153	(58,565)
Amortization				(61,393)	(68,707)
Submission of reimbursable losses to (recoveries payable to) the FDIC				4,901	(44,910)
Impairment				(5,097)	(31,813)
Changes due to a change in cash flow assumptions on OREO and other changes				(7,164)	(14,189)
Balance at end of period	$ 94,712		$ 204,885	$ 94,712	$ 204,885

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Loans Receivable - Schedule of Subsequently Defaulted TDRs (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014 SecurityLoan	Sep. 30, 2013 SecurityLoan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans		5
Pre-modification Outstanding Recorded Investment		$ 12,507
Post-modification Outstanding Recorded Investment		12,329
TDRs Occurring During The Period [Member] | Non-Covered TDRs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans	43	60
Recorded Investment	1,825	18,429
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		5
Pre-modification Outstanding Recorded Investment		12,507
Post-modification Outstanding Recorded Investment		12,329
Number of Loans	31	45
Recorded Investment	58	6,012
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	11	13
Recorded Investment	1,767	12,370
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		$ 47
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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Derivative Instruments and Other Hedging Activities - Reconciliation of Gross Amounts in Consolidated Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative assets subject to master netting arrangements, Gross Amounts	$ 27,262	$ 26,422
Derivative liabilities subject to master netting arrangements, Gross Amounts	11,839	10,620
Derivative assets subject to master netting arrangements, Gross Amounts Not Offset	27,262	26,422
Derivative liabilities subject to master netting arrangements, Gross Amounts Not Offset	7,947	5,201
Collateral [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liabilities subject to master netting arrangements, Gross Amounts Not Offset	(3,892)	(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	11,839	10,621
Derivative liabilities subject to master netting arrangements, Gross Amounts	11,839	10,620
Derivative assets subject to master netting arrangements, Gross Amounts Not Offset	11,839	10,621
Derivative liabilities subject to master netting arrangements, Gross Amounts Not Offset	7,947	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	(3,892)	(5,419)
Written and Purchased Options [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative assets subject to master netting arrangements, Gross Amounts	15,423	15,801
Derivative assets subject to master netting arrangements, Gross Amounts Not Offset	$ 15,423	$ 15,801

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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	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Schedule of Securities Available-for-sale And Held To Maturity [Line Items]
Securities available for sale, Amortized Cost	$ 2,105,100	$ 1,963,046
Securities available for sale, Gross Unrealized Gains	16,992	13,867
Securities available for sale, Gross Unrealized Losses	(18,264)	(40,116)
Securities available for sale, Estimated Fair Value	2,103,828	1,936,797
Securities held to maturity, Amortized Cost	120,520	154,109
Securities held to maturity, Gross Unrealized Gains	3,398	2,205
Securities held to maturity, Gross Unrealized Losses	(1,460)	(3,748)
Securities held to maturity, Estimated Fair Value	122,458	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	359,404	406,092
Securities available for sale, Gross Unrealized Gains	1,465	1,382
Securities available for sale, Gross Unrealized Losses	(5,926)	(11,913)
Securities available for sale, Estimated Fair Value	354,943	395,561
Securities held to maturity, Amortized Cost	10,000	34,478
Securities held to maturity, Gross Unrealized Gains	157	484
Securities held to maturity, Gross Unrealized Losses
Securities held to maturity, Estimated Fair Value	10,157	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	87,895	105,300
Securities available for sale, Gross Unrealized Gains	3,891	2,435
Securities available for sale, Gross Unrealized Losses		(256)
Securities available for sale, Estimated Fair Value	91,786	107,479
Securities held to maturity, Amortized Cost	79,309	84,290
Securities held to maturity, Gross Unrealized Gains	3,044	1,463
Securities held to maturity, Gross Unrealized Losses	(266)	(1,624)
Securities held to maturity, Estimated Fair Value	82,087	84,129
Mortgage-Backed Securities [Member]
Schedule of Securities Available-for-sale And Held To Maturity [Line Items]
Securities available for sale, Amortized Cost	1,656,341	1,450,194
Securities available for sale, Gross Unrealized Gains	11,613	10,031
Securities available for sale, Gross Unrealized Losses	(12,338)	(27,947)
Securities available for sale, Estimated Fair Value	1,655,616	1,432,278
Securities held to maturity, Amortized Cost	31,211	35,341
Securities held to maturity, Gross Unrealized Gains	197	258
Securities held to maturity, Gross Unrealized Losses	(1,194)	(2,124)
Securities held to maturity, Estimated Fair Value	30,214	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	23	19
Securities available for sale, Gross Unrealized Losses
Securities available for sale, Estimated Fair Value	$ 1,483	$ 1,479

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Fair Value of Financial Instruments - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]
Short-term borrowings maturity period	90 days

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	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	$ 10,555,010	$ 8,772,226
Total	524,189	719,793
Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	771,093	87,114
30+ Days Past Due	21,711	6,676
Discount	(21,768)	(7,991)
Total	771,036	85,799
Residential Prime [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	432,837	18,796
30+ Days Past Due	8,444	226
Discount	631	(887)
Total	441,912	18,135
Home Equity [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	228,051	53,995
30+ Days Past Due	10,821	5,071
Discount	(10,803)	(5,623)
Total	228,069	53,443
Indirect Automobile [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	606	1,725
30+ Days Past Due	51	128
Discount	(44)
Total	613	1,853
Consumer - Other [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	109,599	12,598
30+ Days Past Due	2,395	1,251
Discount	(11,552)	(1,481)
Total	100,442	12,368
Internally Assigned Grade Loss [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Discount	(49,732)	(57,622)
Total	604,032	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	(2,061)	(2,532)
Total	37,274	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	(42,527)	(52,176)
Total	467,533	324,838
Internally Assigned Grade Loss [Member] | Commercial Business [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Discount	(5,144)	(2,914)
Total	99,225	53,037
Pass [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	584,848	378,849
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	30,675	17,132
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	456,790	310,303
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	97,383	51,414
Special Mention [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	16,939	17,467
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	3,671	196
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	11,065	15,351
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	2,203	1,920
Substandard [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	51,587	59,288
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	4,989	5,435
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	42,027	51,267
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	4,571	2,586
Doubtful [Member] | Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	390	124
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	178	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	212	31
Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	524,189	719,793	807,002
Covered Loans [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	260,428	303,185
30+ Days Past Due	43,452	66,800
Discount	(61,081)	(74,549)
Covered Loans [Member] | Commercial Business [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	34,234		40,422
Covered Loans [Member] | Residential Prime [Member] | Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	143,529	158,710
30+ Days Past Due	23,993	30,814
Discount	(36,546)	(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	115,813	143,236
30+ Days Past Due	19,403	35,811
Discount	(27,405)	(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	588	648
30+ Days Past Due	33	31
Covered Loans [Member] | Consumer - Other [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	498	591
30+ Days Past Due	23	144
Discount	2,870	2,875
Covered Loans [Member] | Internally Assigned Grade Loss [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	298,634	467,930
Discount	(17,244)	(43,573)
Total	281,390	424,357
Covered Loans [Member] | Internally Assigned Grade Loss [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	242,799	295,436
Covered Loans [Member] | Internally Assigned Grade Loss [Member] | Commercial Real Estate Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	51,861	74,675
Covered Loans [Member] | Internally Assigned Grade Loss [Member] | Commercial Real Estate - Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	210,939	346,225
Covered Loans [Member] | Internally Assigned Grade Loss [Member] | Commercial Business [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	35,834	47,030
Covered Loans [Member] | Internally Assigned Grade Loss [Member] | Residential Prime [Member] | Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	130,976	154,025
Covered Loans [Member] | Internally Assigned Grade Loss [Member] | Home Equity [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	107,811	137,122
Covered Loans [Member] | Internally Assigned Grade Loss [Member] | Credit Card [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	621	679
Covered Loans [Member] | Internally Assigned Grade Loss [Member] | Consumer - Other [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	3,391	3,610
Covered Loans [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	180,150	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	40,754	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	113,309	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	26,087	30,710
Covered Loans [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	24,986	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	1,822	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	22,277	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	887	780
Covered Loans [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	93,452	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	9,285	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	75,353	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	8,814	14,556
Covered Loans [Member] | Doubtful [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	46	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	46	984
Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	2,522,386	2,219,954
30+ Days Past Due	36,071	27,412
Total	2,558,457	2,247,366
Credit risk by payment status, Current	9,129,438	8,222,168
Non-Covered Loans Excluding Acquired Loans [Member] | Residential Prime [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	362,513	286,167
30+ Days Past Due	14,181	11,640
Total	376,694	297,807
Non-Covered Loans Excluding Acquired Loans [Member] | Residential Subprime [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	114,182	114,939
30+ Days Past Due	6,199	1,626
Total	120,381	116,565
Non-Covered Loans Excluding Acquired Loans [Member] | Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	1,220,704	1,091,894
30+ Days Past Due	9,294	9,333
Total	1,229,998	1,101,227
Non-Covered Loans Excluding Acquired Loans [Member] | Indirect Automobile [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	390,413	370,388
30+ Days Past Due	3,665	2,995
Total	394,078	373,383
Non-Covered Loans Excluding Acquired Loans [Member] | Credit Card [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	67,472	62,873
30+ Days Past Due	1,259	769
Total	68,731	63,642
Non-Covered Loans Excluding Acquired Loans [Member] | Consumer - Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	367,102	293,693
30+ Days Past Due	1,473	1,049
Total	368,575	294,742
Non-Covered Loans Excluding Acquired Loans [Member] | Internally Assigned Grade Loss [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	6,621,485	6,040,955
Non-Covered Loans Excluding Acquired Loans [Member] | Internally Assigned Grade Loss [Member] | Commercial Real Estate Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	635,994	383,095
Non-Covered Loans Excluding Acquired Loans [Member] | Internally Assigned Grade Loss [Member] | Commercial Real Estate - Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	2,891,618	2,751,809
Non-Covered Loans Excluding Acquired Loans [Member] | Internally Assigned Grade Loss [Member] | Commercial Business [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	3,093,873	2,906,051
Non-Covered Loans Excluding Acquired Loans [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	6,490,254	5,931,779
Non-Covered Loans Excluding Acquired Loans [Member] | Pass [Member] | Commercial Real Estate Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	624,592	370,824
Non-Covered Loans Excluding Acquired Loans [Member] | Pass [Member] | Commercial Real Estate - Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	2,817,777	2,694,161
Non-Covered Loans Excluding Acquired Loans [Member] | Pass [Member] | Commercial Business [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	3,047,885	2,866,794
Non-Covered Loans Excluding Acquired Loans [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	70,060	42,700
Non-Covered Loans Excluding Acquired 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	249	9,309
Non-Covered Loans Excluding Acquired 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	46,718	27,227
Non-Covered Loans Excluding Acquired Loans [Member] | Special Mention [Member] | Commercial Business [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	23,093	6,164
Non-Covered Loans Excluding Acquired Loans [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	58,774	65,437
Non-Covered Loans Excluding Acquired Loans [Member] | Substandard [Member] | Commercial Real Estate Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	11,153	2,962
Non-Covered Loans Excluding Acquired Loans [Member] | Substandard [Member] | Commercial Real Estate - Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	26,700	30,308
Non-Covered Loans Excluding Acquired Loans [Member] | Substandard [Member] | Commercial Business [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	20,921	32,167
Non-Covered Loans Excluding Acquired Loans [Member] | Doubtful [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	2,397	1,039
Non-Covered Loans Excluding Acquired Loans [Member] | Doubtful [Member] | Commercial Real Estate - Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	423	113
Non-Covered Loans Excluding Acquired Loans [Member] | Doubtful [Member] | Commercial Business [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	$ 1,974	$ 926

XML

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	Sep. 30, 2014
Statement of Financial Position [Abstract]
Covered other real estate owned	$ 20.6

XML

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	Sep. 30, 2014	Dec. 31, 2013
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 52,280	$ 46,754
Accumulated Amortization	(35,423)	(31,415)
Net Carrying Amount	16,857	15,339
Mortgage Servicing Rights [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	2,787	2,146
Accumulated Amortization	(1,020)	(638)
Net Carrying Amount	$ 1,767	$ 1,508

XML

Derivative Instruments and Other Hedging Activities - Schedule of Outstanding Derivative Instruments (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Notional Amount	$ 872,952	$ 868,604
Derivative Liability, Notional Amount	970,428	624,455
Not Designated as Hedging Instruments [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Notional Amount	872,952	868,604
Derivative Liability, Notional Amount	970,428	624,455
Not Designated as Hedging Instruments [Member] | Interest Rate Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Notional Amount	421,523	380,303
Derivative Liability, Notional Amount	421,523	380,303
Not Designated as Hedging Instruments [Member] | Forward Sales Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Notional Amount	88,190	192,876
Derivative Liability, Notional Amount	351,861	45,091
Not Designated as Hedging Instruments [Member] | Written and Purchased Options [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Notional Amount	363,239	295,425
Derivative Liability, Notional Amount	197,044	199,061
Other Assets [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Fair Value	32,290	30,076
Other Assets [Member] | Not Designated as Hedging Instruments [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Fair Value	32,290	30,076
Other Assets [Member] | Not Designated as Hedging Instruments [Member] | Interest Rate Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Fair Value	11,839	10,621
Other Assets [Member] | Not Designated as Hedging Instruments [Member] | Forward Sales Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Fair Value	104	1,468
Other Assets [Member] | Not Designated as Hedging Instruments [Member] | Written and Purchased Options [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Fair Value	20,347	17,987
Other Liabilities [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liability, Fair Value	29,840	26,735
Other Liabilities [Member] | Not Designated as Hedging Instruments [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liability, Fair Value	29,840	26,735
Other Liabilities [Member] | Not Designated as Hedging Instruments [Member] | Interest Rate Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liability, Fair Value	11,839	10,620
Other Liabilities [Member] | Not Designated as Hedging Instruments [Member] | Forward Sales Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liability, Fair Value	2,215	287
Other Liabilities [Member] | Not Designated as Hedging Instruments [Member] | Written and Purchased Options [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liability, Fair Value	$ 15,786	$ 15,828

XML

Allowance for Credit Losses and Credit Quality - Schedule of Investment in Impaired Loan (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 39,250		$ 39,250		$ 45,342
Unpaid Principal Balance	39,618		39,618		46,501
Related Allowance	(368)		(368)		(1,159)
Average Recorded Investment	40,761	50,310	41,026	49,840
Interest Income Recognized	22	23	379	136
Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	11,902		11,902		25,018
Unpaid Principal Balance	11,937		11,937		25,877
Related Allowance	(35)		(35)		(859)
Average Recorded Investment	12,522	31,006	13,648	30,233
Interest Income Recognized	17	23	168	89
Commercial Loans [Member] | With No Related Allowance Recorded [Member] | Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	6,990		6,990		8,567
Unpaid Principal Balance	6,990		6,990		8,567
Related Allowance
Average Recorded Investment	7,026	10,703	7,114	12,787
Interest Income Recognized	6	6	20	22
Commercial Loans [Member] | With No Related Allowance Recorded [Member] | Business [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	3,276		3,276		13,256
Unpaid Principal Balance	3,276		3,276		13,256
Related Allowance
Average Recorded Investment	3,553	13,218	4,417	8,608
Interest Income Recognized	11	17	48	59
Commercial Loans [Member] | With No Related Allowance Recorded [Member] | Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	689		689		258
Unpaid Principal Balance	689		689		258
Related Allowance
Average Recorded Investment	692	265	700	287
Interest Income Recognized			14
Commercial Loans [Member] | With An Allowance Recorded [Member] | Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,450		1,450		1,268
Unpaid Principal Balance	1,483		1,483		1,284
Related Allowance	(33)		(33)		(16)
Average Recorded Investment	1,631	4,346	1,533	6,092
Interest Income Recognized			91	5
Commercial Loans [Member] | With An Allowance Recorded [Member] | Business [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	186		186		1,927
Unpaid Principal Balance	188		188		2,770
Related Allowance	(2)		(2)		(843)
Average Recorded Investment	312	2,739	584	2,746
Interest Income Recognized			9	3
Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	16,915		16,915		11,408
Unpaid Principal Balance	17,170		17,170		11,645
Related Allowance	(255)		(255)		(237)
Average Recorded Investment	17,305	9,650	16,341	9,380
Interest Income Recognized			119	7
Mortgage Loans [Member] | With An Allowance Recorded [Member] | Residential Prime [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	10,746		10,746		9,791
Unpaid Principal Balance	10,973		10,973		10,019
Related Allowance	(227)		(227)		(228)
Average Recorded Investment	11,077	9,650	10,226	9,380
Interest Income Recognized			119	7
Mortgage Loans [Member] | With An Allowance Recorded [Member] | Residential Subprime [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	6,169		6,169		1,617
Unpaid Principal Balance	6,197		6,197		1,626
Related Allowance	(28)		(28)		(9)
Average Recorded Investment	6,228		6,115
Interest Income Recognized
Consumer Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	10,433		10,433		8,916
Unpaid Principal Balance	10,511		10,511		8,979
Related Allowance	(78)		(78)		(63)
Average Recorded Investment	10,934	9,654	11,037	10,227
Interest Income Recognized	5		92	40
Consumer Loans [Member] | With An Allowance Recorded [Member] | Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	7,017		7,017		6,506
Unpaid Principal Balance	7,064		7,064		6,550
Related Allowance	(47)		(47)		(44)
Average Recorded Investment	7,177	7,244	7,404	7,458
Interest Income Recognized	5		40	14
Consumer Loans [Member] | With An Allowance Recorded [Member] | Indirect Automobile [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,330		1,330		1,267
Unpaid Principal Balance	1,338		1,338		1,275
Related Allowance	(8)		(8)		(8)
Average Recorded Investment	1,544	1,349	1,720	1,610
Interest Income Recognized			27	22
Consumer Loans [Member] | With An Allowance Recorded [Member] | Credit Card [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	968		968		404
Unpaid Principal Balance	987		987		411
Related Allowance	(19)		(19)		(7)
Average Recorded Investment	1,051	424	724	426
Interest Income Recognized
Consumer Loans [Member] | With An Allowance Recorded [Member] | Consumer - Other [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	429		429		481
Unpaid Principal Balance	433		433		485
Related Allowance	(4)		(4)		(4)
Average Recorded Investment	470	372	489	446
Interest Income Recognized			$ 11	$ 4

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Loans Receivable - Schedule of Troubled Debt Restructurings (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 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
Commercial Loans [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Loans, Current	367	411
Accruing Loans, Past Due Greater than 30 Days
Nonaccrual TDRs	58	5,601
Total TDRs	425	6,012
Commercial Loans [Member] | Business [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Loans, Current	726	1,056
Accruing Loans, Past Due Greater than 30 Days
Nonaccrual TDRs	2,027	12,610
Total TDRs	2,753	13,666
Residential Mortgage Loans [Member] | Residential Prime [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Loans, Past Due Greater than 30 Days
Residential Mortgage Loans [Member] | Residential Subprime [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Loans, Past Due Greater than 30 Days
Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Loans, Current	1,093	1,467
Accruing Loans, Past Due Greater than 30 Days
Nonaccrual TDRs	2,328	18,474
Total TDRs	3,421	19,941
Consumer and Other Loans [Member] | Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Loans, Past Due Greater than 30 Days
Nonaccrual TDRs	243	263
Total TDRs	243	263
Consumer and Other Loans [Member] | Indirect Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Loans, Past Due Greater than 30 Days
Consumer and Other Loans [Member] | Credit Card [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Loans, Past Due Greater than 30 Days
Consumer and Other Loans [Member] | Consumer - Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing Loans, Past Due Greater than 30 Days

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Fair Value of Financial Instruments

9 Months Ended

Sep. 30, 2014

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

NOTE 18 – 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 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 receivable 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 September 30, 2014 and December 31, 2013, weighted for varying maturity dates. Other non-covered loans receivable are valued based on present values using entry-value interest rates at September 30, 2014 and December 31, 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 September 30, 2014 and December 31, 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 September 30, 2014 and December 31, 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:

	September 30, 2014				December 31, 2013
	Carrying		Fair		Carrying		Fair
(Dollars in thousands)	Amount		Value		Amount		Value
Financial Assets
Cash and cash equivalents	$	668,007	$	668,007	$	391,396	$	391,396
Investment securities		2,224,348		2,226,286		2,090,906		2,089,363
Loans and loans held for sale		11,227,729		11,247,080		9,620,461		9,724,432
FDIC loss share receivable		94,712		27,922		162,312		21,918
Derivative instruments		32,290		32,290		30,076		30,076
Accrued interest receivable		37,143		37,143		32,143		32,143
Financial Liabilities
Deposits	$	12,377,775	$	11,986,233	$	10,737,000	$	10,226,573
Short-term borrowings		812,783		812,783		680,344		680,344
Long-term debt		355,569		324,282		280,699		235,503
Derivative instruments		29,840		29,840		26,735		26,735
Accrued interest payable		7,972		7,972		6,102		6,102

The fair value estimates presented herein are based upon pertinent information available to management as of September 30, 2014 and December 31, 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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Earnings Per Share - Schedule of Basic Earnings Per Common Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Distributed earnings to common shareholders	$ 11,200	$ 9,926	$ 32,430	$ 29,736
Undistributed earnings (distributed capital) to common shareholders	18,100	12,845	37,123	9,019
Total earnings to common shareholders	29,300	22,771	69,553	38,755
Distributed earnings per common share	$ 0.34	$ 0.34	$ 1.05	$ 1.03
Undistributed earnings (distributed capital) per common share	$ 0.55	$ 0.44	$ 1.21	$ 0.31
Total earnings per common share-basic	$ 0.89	$ 0.78	$ 2.26	$ 1.34
Unvested Restricted Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Distributed earnings to common shareholders	170	183	529	571
Undistributed earnings (distributed capital) to common shareholders	274	238	605	173
Total earnings allocated to restricted stock	$ 444	$ 421	$ 1,134	$ 744
Distributed earnings per common share	$ 0.34	$ 0.34	$ 1.01	$ 1.02
Undistributed earnings (distributed capital) per common share	$ 0.54	$ 0.43	$ 1.15	$ 0.31
Total earnings per common share-basic	$ 0.88	$ 0.77	$ 2.16	$ 1.33

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Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2014

Commitments and Contingencies Disclosure [Abstract]

Summary of Financial Instruments Outstanding

At September 30, 2014 and December 31, 2013, the Company had the following financial instruments outstanding, whose contract amounts represent credit risk:

(Dollars in thousands)	September 30 2014		December 31 2013
Commitments to grant loans	$	242,137	$	221,627
Unfunded commitments under lines of credit		3,834,107		3,326,448
Commercial and standby letters of credit		131,347		105,026
Reserve for unfunded lending commitments		12,099		11,147

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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	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Transfer of balance to OREO	$ (5,378)	$ (30,315)
Transfer of balance to the RULC		(9,828)
Loans charged off	(21,651)	(9,148)
Recoveries	4,777	4,353
Balance at beginning of period	11,147
Transfer of balance from the allowance for loan losses		9,828
Balance at end of period	12,099	11,959
Balance at end of period	524,189		719,793
Non-Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	71,899	83,027
(Reversal of) Provision for loan losses	7,840	420
Transfer of balance to OREO	(207)	(1,013)
Transfer of balance to the RULC		(9,828)
Loans charged off	(8,828)	(7,465)
Recoveries	4,739	4,353
Balance at end of period	75,443	69,494
Balance at beginning of period	11,147
Transfer of balance from the allowance for loan losses		9,828
(Reversal of) Provision for unfunded commitments	952	2,131
Balance at end of period	12,099	11,959
Allowance on loans individually evaluated for impairment	25	1,092
Allowance on loans collectively evaluated for impairment	75,418	68,402
Balance at end of period	10,555,010	8,236,035
Balance at end of period individually evaluated for impairment	11,339	25,747
Balance at end of period collectively evaluated for impairment	10,543,671	8,210,288
Balance at end of period acquired with deteriorated credit quality	19,490	18,267
Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	71,175	168,576
(Reversal of) Provision for loan losses	4,725	25
(Decrease) Increase in FDIC loss share receivable	1,153	(58,565)
Transfer of balance to OREO	(5,171)	(29,302)
Transfer of balance to the RULC
Loans charged off	(12,823)	(1,683)
Recoveries	38
Balance at end of period	59,097	79,051
Balance at beginning of period
Transfer of balance from the allowance for loan losses
Balance at end of period
Allowance on loans collectively evaluated for impairment	59,097	79,051
Balance at end of period	524,189	807,002	719,793
Balance at end of period collectively evaluated for impairment	524,189	807,002
Balance at end of period acquired with deteriorated credit quality	46,301	78,484
Commercial Real Estate [Member] | Non-Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	26,590	38,264
(Reversal of) Provision for loan losses	611	(6,926)
Transfer of balance to OREO		(279)
Transfer of balance to the RULC		(2,939)
Loans charged off	(1,214)	(1,966)
Recoveries	2,209	1,498
Balance at end of period	28,196	27,652
Balance at beginning of period	3,089
Transfer of balance from the allowance for loan losses		2,939
(Reversal of) Provision for unfunded commitments	726	1,207
Balance at end of period	3,815	4,146
Allowance on loans individually evaluated for impairment	25	8
Allowance on loans collectively evaluated for impairment	28,171	27,644
Balance at end of period	4,032,419	3,320,333
Balance at end of period individually evaluated for impairment	7,357	9,529
Balance at end of period collectively evaluated for impairment	4,025,062	3,310,804
Balance at end of period acquired with deteriorated credit quality	15,061	16,287
Commercial Real Estate [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	38,772	100,871
(Reversal of) Provision for loan losses	2,544	27
(Decrease) Increase in FDIC loss share receivable	734	(30,853)
Transfer of balance to OREO	(1,874)	(22,375)
Loans charged off	(9,578)	(1,683)
Recoveries	38
Balance at end of period	30,636	45,987
Allowance on loans collectively evaluated for impairment	30,636	45,987
Balance at end of period	247,156	459,506
Balance at end of period collectively evaluated for impairment	247,156	459,506
Balance at end of period acquired with deteriorated credit quality	4,678	23,751
Commercial Business [Member] | Non-Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	28,515	28,721
(Reversal of) Provision for loan losses	2,187	(582)
Transfer of balance to OREO	(130)	(81)
Transfer of balance to the RULC		(3,497)
Loans charged off	(1,097)	(531)
Recoveries	93	354
Balance at end of period	29,568	24,384
Balance at beginning of period	4,839
Transfer of balance from the allowance for loan losses		3,497
(Reversal of) Provision for unfunded commitments	192	610
Balance at end of period	5,031	4,107
Allowance on loans individually evaluated for impairment		801
Allowance on loans collectively evaluated for impairment	29,568	23,583
Balance at end of period	3,193,098	2,643,822
Balance at end of period individually evaluated for impairment	3,276	14,548
Balance at end of period collectively evaluated for impairment	3,189,822	2,629,274
Balance at end of period acquired with deteriorated credit quality	2,562	45
Commercial Business [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	5,380	11,375
(Reversal of) Provision for loan losses	376
(Decrease) Increase in FDIC loss share receivable	609	(3,137)
Transfer of balance to OREO	(1,162)	(314)
Loans charged off	(2,192)
Balance at end of period	3,011	7,924
Allowance on loans collectively evaluated for impairment	3,011	7,924
Balance at end of period	34,234	40,422
Balance at end of period collectively evaluated for impairment	34,234	40,422
Balance at end of period acquired with deteriorated credit quality	620
Mortgage [Member] | Non-Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	2,546	2,125
(Reversal of) Provision for loan losses	514	1,048
Transfer of balance to OREO	(12)	(646)
Transfer of balance to the RULC		(40)
Loans charged off	(607)	(481)
Recoveries	134	698
Balance at end of period	2,575	2,704
Balance at beginning of period	72
Transfer of balance from the allowance for loan losses		40
(Reversal of) Provision for unfunded commitments	11	38
Balance at end of period	83	78
Allowance on loans individually evaluated for impairment		283
Allowance on loans collectively evaluated for impairment	2,575	2,421
Balance at end of period	938,987	409,940
Balance at end of period individually evaluated for impairment		1,407
Balance at end of period collectively evaluated for impairment	938,987	408,533
Balance at end of period acquired with deteriorated credit quality	160	120
Consumer [Member] | Non-Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	14,248	13,917
(Reversal of) Provision for loan losses	4,528	6,880
Transfer of balance to OREO	(65)	(7)
Transfer of balance to the RULC		(3,352)
Loans charged off	(5,910)	(4,487)
Recoveries	2,303	1,803
Balance at end of period	15,104	14,754
Balance at beginning of period	3,147
Transfer of balance from the allowance for loan losses		3,352
(Reversal of) Provision for unfunded commitments	23	276
Balance at end of period	3,170	3,628
Allowance on loans collectively evaluated for impairment	15,104	14,754
Balance at end of period	2,390,506	1,861,940
Balance at end of period individually evaluated for impairment	706	263
Balance at end of period collectively evaluated for impairment	2,389,800	1,861,677
Balance at end of period acquired with deteriorated credit quality	1,707	1,815
Consumer [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	16,134	33,764
(Reversal of) Provision for loan losses	834	(1)
(Decrease) Increase in FDIC loss share receivable	2,721	(18,841)
Transfer of balance to OREO	(1,487)	1
Loans charged off	(963)
Balance at end of period	17,239	14,923
Allowance on loans collectively evaluated for impairment	17,239	14,923
Balance at end of period	111,823	153,559
Balance at end of period collectively evaluated for impairment	111,823	153,559
Balance at end of period acquired with deteriorated credit quality	16,699	26,400
Mortgage [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	10,889	22,566
(Reversal of) Provision for loan losses	971	(1)
(Decrease) Increase in FDIC loss share receivable	(2,911)	(5,734)
Transfer of balance to OREO	(648)	(6,614)
Loans charged off	(90)
Balance at end of period	8,211	10,217
Allowance on loans collectively evaluated for impairment	8,211	10,217
Balance at end of period	130,976	153,515
Balance at end of period collectively evaluated for impairment	130,976	153,515
Balance at end of period acquired with deteriorated credit quality	$ 24,304	$ 28,333

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Share-Based Compensation - Compensation Expense Included in Salaries and Employee Benefits Expense Related to Restricted Stock Grants (Detail) (Restricted Stock [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense related to restricted stock	$ 2,497	$ 2,212	$ 7,382	$ 6,407

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Other Real Estate Owned (Tables)

9 Months Ended

Sep. 30, 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 sheet. Other real estate owned, segregated into non-covered and covered properties, consists of the following 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.

	September 30, 2014						December 31, 2013
(Dollars in thousands)	Non-covered		Covered(1)		Total		Non-covered		Covered		Total
Real estate owned acquired by foreclosure	$	18,627	$	30,991	$	49,618	$	28,072	$	60,474	$	88,546
Real estate acquired for development or resale		12,734		—		12,734		9,206		—		9,206
Other foreclosed property		63		971		1,034		93		1,328		1,421
Total	$	31,424	$	31,962	$	63,386	$	37,371	$	61,802	$	99,173

⁽¹⁾  Included in covered OREO at September 30, 2014 is $20.6 million that will lose loss share coverage within the next 12 months.

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Acquisition Activity - Additional Information (Detail) (USD $)	0 Months Ended	9 Months Ended			0 Months Ended	9 Months Ended		0 Months Ended	9 Months Ended		0 Months Ended				0 Months Ended
	Jan. 17, 2014 Trust	Sep. 30, 2014	Dec. 31, 2013	Dec. 31, 2012	May 31, 2014 Teche [Member]	Sep. 30, 2014 Teche [Member] Branch	May 31, 2014 Teche [Member]	Jun. 30, 2014 First Private [Member] Branch	Sep. 30, 2014 First Private [Member]	Jun. 30, 2014 First Private [Member]	Jun. 30, 2014 First Private [Member] Mobile Branches [Member] Branch	Feb. 24, 2014 Title Company LLC [Member]	Sep. 30, 2014 Title Company LLC [Member]	Feb. 24, 2014 Title Company LLC [Member]	May 01, 2014 Louisiana Abstract and Title Llc [Member]	Sep. 30, 2014 Louisiana Abstract and Title Llc [Member]
Business Acquisition [Line Items]
Cash payment to acquire business	$ 91,600,000					$ 714,000			$ 1,000			$ 400,000			$ 200,000
Goodwill	8,600,000	526,242,000	401,872,000	401,872,000		84,786,000	84,800,000		30,611,000	30,600,000			221,000	200,000		155,000
Number of branches acquired	4
Shares received							1.162			0.270
Total consideration paid					156,700,000	156,740,000		58,600,000	58,640,000
Business combination date of acquisition						May 31, 2014			Jun. 30, 2014
Number of branches						20		4			2
Goodwill created in the acquisition deductible for income tax purposes							$ 0			$ 0
Maximum period for subject to change estimated fair values after acquisition date		1 year

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Loans Receivable - Schedule of Non-Covered Loans on Nonaccrual Status (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	$ 38,060	$ 43,687
Commercial Loans [Member] | Commercial Real Estate Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	1,317	1,803
Commercial Loans [Member] | Commercial Real Estate - Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	6,789	7,648
Commercial Loans [Member] | Business [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	2,737	15,020
Residential Mortgage Loans [Member] | Residential Prime [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	10,973	8,611
Residential Mortgage Loans [Member] | Residential Subprime [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	6,197	1,626
Consumer and Other Loans [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	7,306	6,808
Consumer and Other Loans [Member] | Indirect Automobile [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	1,338	1,275
Consumer and Other Loans [Member] | Credit Card [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	987	411
Consumer and Other Loans [Member] | Consumer - Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	$ 416	$ 485

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Business Segments - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2014 Segment
Segment Reporting [Abstract]
No of business segments	3

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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	Sep. 30, 2014	Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract]
Securities Available for Sale, Weighted Average Yield, Within one year or less	1.27%
Securities Available for Sale, Weighted Average Yield, One through five years	1.54%
Securities Available for Sale, Weighted Average Yield, After five through ten years	2.10%
Securities Available for Sale, Weighted Average Yield, Over ten years	2.18%
Securities Available for Sale, Weighted Average Yield, Total	2.08%
Securities Available for Sale, Amortized Cost, Within one year or less	$ 15,397
Securities Available for Sale, Amortized Cost, One through five years	241,992
Securities Available for Sale, Amortized Cost, After five through ten years	474,758
Securities Available for Sale, Amortized Cost, Over ten years	1,372,953
Securities Available for Sale, Amortized Cost, Total	2,105,100
Securities Available for Sale, Estimated Fair Value, Within one year or less	15,488
Securities Available for Sale, Estimated Fair Value, One through five years	241,502
Securities Available for Sale, Estimated Fair Value, After five through ten years	476,954
Securities Available for Sale, Estimated Fair Value, Over ten years	1,369,884
Securities Available for Sale, Estimated Fair Value, Totals	2,103,828	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	2.84%
Securities Held to Maturity, Weighted Average Yield, After five through ten years	2.97%
Securities Held to Maturity, Weighted Average Yield, Over ten years	3.05%
Securities Held to Maturity, Weighted Average Yield, Totals	2.98%
Securities Held to Maturity, Amortized Cost, Within one year or less	10,000
Securities Held to Maturity, Amortized Cost, One through five years	12,968
Securities Held to Maturity, Amortized Cost, After five through ten years	17,983
Securities Held to Maturity, Amortized Cost, Over ten years	79,569
Securities Held to Maturity, Amortized Cost, Totals	120,520	154,109
Securities Held to Maturity, Estimated Fair Value, Within one year or less	10,157
Securities Held to Maturity, Estimated Fair Value, One through five years	13,352
Securities Held to Maturity, Estimated Fair Value, After five through ten years	18,591
Securities Held to Maturity, Estimated Fair Value, Over ten years	80,358
Securities held to maturity, Estimated Fair Value	$ 122,458	$ 152,566

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Recent Accounting Pronouncements - Additional Information (Detail)	9 Months Ended
	Sep. 30, 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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Recent Accounting Pronouncements

9 Months Ended

Sep. 30, 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 credit (“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. Alternatively, 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, with early adoption permitted. If 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 that a change in accounting policy would have on its consolidated financial statements, but does not anticipate that the potential accounting policy change to the proportional amortization method 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, with early adoption permitted. 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 obligations 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 the adoption of this ASU will have on its consolidated financial statements, but the Company does not expect 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 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 2014-11 also require certain disclosures for transfer of financial assets and repurchase agreements.

ASU 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 that the adoption of this ASU will have on its Consolidated financial statements, but the Company 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 that the adoption of this ASU will have on its consolidated financial statements, but the Company does not expect that such adoption will have a significant impact on the Company’s consolidated financial statements.

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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		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Investments, Debt and Equity Securities [Abstract]
Realized gains	$ 582		$ 609	$ 2,369
Realized losses		(3)		(110)
Net realized gains (losses)	$ 582	$ (3)	$ 609	$ 2,259

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 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:

	September 30, 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	$	148,530	$	142,381	$	6,149	$	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)	September 30, 2014
	(Level 1)		(Level 2)		(Level 3)		Total
Assets
Available for sale securities	$	46,261	$	2,057,567	$	—	$	2,103,828
Mortgage loans held for sale		—		148,530		—		148,530
Derivative instruments		—		32,290		—		32,290
Total	$	46,261	$	2,238,387	$	—	$	2,284,648
Liabilities
Derivative instruments		—		29,840		—		29,840
Total	$	—	$	29,840	$	—	$	29,840
	December 31, 2013
	(Level 1)		(Level 2)		(Level 3)		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 changes in net assets) 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 (or changes in net assets)	$	(1,697	)	$	—
Change in unrealized gains (losses) relating to assets still held at September 30, 2014		—			16,235

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)	September 30, 2014
	(Level 1)		(Level 2)		(Level 3)		Total
Assets
Loans	$	—	$	1,086	$	—	$	1,086
OREO		—		6,974		—		6,974
Total	$	—	$	8,060	$	—	$	8,060
(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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Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 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 Three Months Ended						For the Nine Months Ended
	September 30						September 30
(Dollars in thousands, except per share data)	2014			2013			2014			2013
Income available to common shareholders	$	29,744		$	23,192		$	70,687		$	39,499
Distributed earnings (capital) to unvested restricted stock		(444	)		(421	)		(1,134	)		(744	)
Distributed earnings (capital) to common shareholders—basic		29,300			22,771			69,553			38,755
Undistributed earnings reallocated to unvested restricted stock		(4	)		(4	)		(25	)		—
Distributed and undistributed earnings to common shareholders—diluted	$	29,296		$	22,767		$	69,528		$	38,755
Weighted average shares outstanding—basic (1)		33,309,881			29,631,799			31,316,267			29,582,081
Weighted average shares outstanding—diluted		32,926,969			29,147,232			30,923,050			29,062,238
Earnings per common share—basic	$	0.89		$	0.78		$	2.26		$	1.34
Earnings per common share—diluted		0.89			0.78			2.25			1.33
Earnings per unvested restricted stock share—basic		0.88			0.77			2.16			1.33
Earnings per unvested restricted stock share—diluted		0.89			0.78			2.21			1.33

(1) Weighted average basic shares outstanding include 506,464 and 547,155 shares of unvested restricted stock for the three months ended September 30, 2014 and 2013, respectively, and 525,441 and 559,556 shares for the nine months ended September 30, 2014 and 2013, respectively.

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 Three Months Ended				For the Nine Months Ended
	September 30				September 30
(Dollars in thousands, except per share data)	2014		2013		2014		2013
Distributed earnings to common shareholders	$	11,200	$	9,926	$	32,430	$	29,736
Undistributed earnings (distributed capital) to common shareholders		18,100		12,845		37,123		9,019
Total earnings to common shareholders	$	29,300	$	22,771	$	69,553	$	38,755
Distributed earnings to unvested restricted stock	$	170	$	183	$	529	$	571
Undistributed earnings (distributed capital) to unvested restricted stock		274		238		605		173
Total earnings allocated to restricted stock	$	444	$	421	$	1,134	$	744
Distributed earnings per common share	$	0.34	$	0.34	$	1.05	$	1.03
Undistributed earnings (distributed capital) per common share		0.55		0.44		1.21		0.31
Total earnings per common share—basic	$	0.89	$	0.78	$	2.26	$	1.34
Distributed earnings per unvested restricted stock share	$	0.34	$	0.34	$	1.01	$	1.02
Undistributed earnings (distributed capital) per unvested restricted stock share		0.54		0.43		1.15		0.31
Total earnings per unvested restricted stock share—basic	$	0.88	$	0.77	$	2.16	$	1.33

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Basis of Presentation (Policies)

9 Months Ended

Sep. 30, 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, valuation of and accounting for acquired loans, and valuation of goodwill, intangible assets and other purchase accounting adjustments.

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.

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. Examples may include certain collateralized mortgage and debt obligations.

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). See Note 17 for additional information related to mortgage loans held for sale.

Impaired loans

Loans are measured for impairment using the methods permitted by Accounting Standards Codification (‘‘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 September 30, 2014 and December 31, 2013 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 $0.5 million and $1.4 million in earnings for the three months ended September 30, 2014 and 2013, respectively, and $1.9 million and $4.0 million for the nine months ended September 30, 2014 and 2013, 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 lock commitments 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 lock commitments, forward sales contracts, 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. See Note 12 for further discussion and details related to derivative financial instruments.

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Share-Based Compensation - Schedule of Share and Dividend Equivalent Share Award Activity (Detail) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Number of share equivalents, Beginning Balance	417,238	318,729
Number of share equivalents, Granted	115,620	166,664
Number of share equivalents, Forfeited share equivalents	(19,498)	(16,381)
Number of share equivalents, Vested share equivalents	(68,480)	(45,065)
Number of share equivalents, Ending Balance	444,880	423,947
Dividend equivalents, Beginning Balance	22,351	16,035
Dividend equivalents, Granted	7,147	8,793
Dividend equivalents, Forfeited share equivalents	(1,751)	(681)
Dividend equivalents, Vested share equivalents	(6,615)	(3,327)
Dividend equivalents, Ending Balance	21,132	20,820
Total share equivalents, Beginning Balance	439,589	334,764
Total share equivalents, Granted	122,767	175,457
Total share equivalents, Forfeited share equivalents	(21,249)	(17,062)
Total share equivalents, Vested share equivalents	(75,095)	(48,392)
Total share equivalents, Ending Balance	466,012	444,767
Value of share equivalents, Beginning Balance	$ 27,628,000	$ 16,444,000
Value of share equivalents, Granted	7,674,000	9,108,000
Value of share equivalents, Forfeited share equivalents	(1,328,000)	(886,000)
Value of share equivalents, Vested share equivalents	(5,002,000)	(2,453,000)
Value of share equivalents, Ending Balance	$ 29,130,000	$ 23,088,000

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Acquisition Activity - Supplemental Pro Forma Information (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Business Acquisition, Pro Forma Information [Abstract]
Interest and non-interest income	$ 500,638
Net income	$ 46,139
Earnings per share-basic	$ 1.40
Earnings per share-diluted	$ 1.40

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Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 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:

	September 30, 2014				December 31, 2013
	Carrying		Fair		Carrying		Fair
(Dollars in thousands)	Amount		Value		Amount		Value
Financial Assets
Cash and cash equivalents	$	668,007	$	668,007	$	391,396	$	391,396
Investment securities		2,224,348		2,226,286		2,090,906		2,089,363
Loans and loans held for sale		11,227,729		11,247,080		9,620,461		9,724,432
FDIC loss share receivable		94,712		27,922		162,312		21,918
Derivative instruments		32,290		32,290		30,076		30,076
Accrued interest receivable		37,143		37,143		32,143		32,143
Financial Liabilities
Deposits	$	12,377,775	$	11,986,233	$	10,737,000	$	10,226,573
Short-term borrowings		812,783		812,783		680,344		680,344
Long-term debt		355,569		324,282		280,699		235,503
Derivative instruments		29,840		29,840		26,735		26,735
Accrued interest payable		7,972		7,972		6,102		6,102

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Acquisition Activity (Tables)

9 Months Ended

Sep. 30, 2014

Schedule of Assets Acquired under Business Acquisitions

As part of the acquisitions, LTC also acquired or created the following other assets:

			Louisiana Abstract and Title
(Dollars in thousands)	The Title Company LLC		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 nine months ended September 30, 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
Interest and non-interest income	$	500,638
Net income		46,139
Earnings per share—basic		1.40
Earnings per share—diluted		1.40

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				71,954
Goodwill			$	84,786

Schedule of Business Acquisitions, by Acquisition

Teche			Preliminary
			Fair Value			As recorded by
(Dollars in thousands)	As Acquired		Adjustments			IBERIABANK
Assets
Cash and cash equivalents	$	71,611	$	—		$	71,611
Investment securities		24,077		1,092	(1)		25,169
Loans		716,196		(16,636	)(2)		699,560
Other real estate owned		329		(153	)(3)		176
Core deposit intangible		—		2,055	(4)		2,055
Deferred tax asset		1,057		7,337	(5)		8,394
Other assets		56,752		(6,261	)(6)		50,491
Total Assets	$	870,022	$	(12,566	)	$	857,456
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		5,366		—			5,366
Total Liabilities	$	778,296	$	7,206		$	785,502

Explanation of certain fair value adjustments

⁽¹⁾  The amount represents the adjustment to 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 write down 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.

⁽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 is necessary because the interest rate of Teche’s borrowings exceeded current interest rates on similar borrowings.

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 liabilities assumed including identifiable intangible assets				28,029
Goodwill			$	30,611

Schedule of Business Acquisitions, by Acquisition

First Private			Preliminary
			Fair Value			As recorded by
(Dollars in thousands)	As Acquired		Adjustments			IBERIABANK
Assets
Cash and cash equivalents	$	26,621	$	—		$	26,621
Investment securities		18,920		297	(1)		19,217
Loans		295,736		(910	)(2)		294,826
Other real estate owned		—		—			—
Core deposit intangible		—		506	(3)		506
Deferred tax asset (liability)		530		122	(4)		652
Other assets		5,230		—			5,230
Total Assets	$	347,037	$	15		$	347,052
Liabilities
Interest-bearing deposits	$	261,713	$	220	(5)	$	261,933
Non-interest-bearing deposits		50,333		—			50,333
Borrowings		6,451		—			6,451
Other liabilities		306		—			306
Total Liabilities	$	318,803	$	220		$	319,023

Explanation of certain fair value adjustments

⁽¹⁾  The amount represents the adjustment to 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 liability 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 85 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			Preliminary
			Fair Value			As recorded by
(Dollars in thousands)	As Acquired		Adjustments			IBERIABANK
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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Investment Securities (Tables)

9 Months Ended

Sep. 30, 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:

	September 30, 2014
			Gross		Gross			Estimated
	Amortized		Unrealized		Unrealized			Fair
(Dollars in thousands)	Cost		Gains		Losses			Value
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	359,404	$	1,465	$	(5,926	)	$	354,943
Obligations of state and political obligations		87,895		3,891		—			91,786
Mortgage-backed securities		1,656,341		11,613		(12,338	)		1,655,616
Other securities		1,460		23		—			1,483
Total securities available for sale	$	2,105,100	$	16,992	$	(18,264	)	$	2,103,828
Securities held to maturity:
U.S. Government-sponsored enterprise obligations	$	10,000	$	157	$	—		$	10,157
Obligations of state and political obligations		79,309		3,044		(266	)		82,087
Mortgage-backed securities		31,211		197		(1,194	)		30,214
Total securities held to maturity	$	120,520	$	3,398	$	(1,460	)	$	122,458
	December 31, 2013
			Gross		Gross			Estimated
	Amortized		Unrealized		Unrealized			Fair
(Dollars in thousands)	Cost		Gains		Losses			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 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:

	September 30, 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	$	—		$	—	$	(5,926	)	$	258,521	$	(5,926	)	$	258,521
Obligations of state and political obligations		—			186		—			—		—			186
Mortgage-backed securities		(2,846	)		552,357		(9,492	)		333,795		(12,338	)		886,152
Total securities available for sale	$	(2,846	)	$	552,543	$	(15,418	)	$	592,316	$	(18,264	)	$	1,144,859
Securities held to maturity:
Obligations of state and political obligations	$	(1	)	$	564	$	(265	)	$	10,811	$	(266	)	$	11,375
Mortgage-backed securities		—			72		(1,194	)		24,303		(1,194	)		24,375
Total securities held to maturity	$	(1	)	$	636	$	(1,459	)	$	35,114	$	(1,460	)	$	35,750
	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 September 30, 2014 and December 31, 2013 is presented in the following table.

(Dollars in thousands)	September 30, 2014		December 31, 2013
Number of securities
Issued by Fannie Mae, Freddie Mac, or Ginnie Mae		78		20
Issued by political subdivisions		6		5
		84		25
Amortized Cost Basis
Issued by Fannie Mae, Freddie Mac, or Ginnie Mae	$	633,230	$	104,520
Issued by political subdivisions		11,076		7,956
	$	644,306	$	112,476
Unrealized Loss
Issued by Fannie Mae, Freddie Mac, or Ginnie Mae	$	16,611	$	5,519
Issued by political subdivisions		265		669
	$	16,876	$	6,188

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 September 30, 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
	Weighted					Estimated		Weighted					Estimated
	Average			Amortized		Fair		Average			Amortized		Fair
(Dollars in thousands)	Yield			Cost		Value		Yield			Cost		Value
Within one year or less		1.27	%	$	15,397	$	15,488		2.65	%	$	10,000	$	10,157
One through five years		1.54			241,992		241,502		2.84			12,968		13,352
After five through ten years		2.10			474,758		476,954		2.97			17,983		18,591
Over ten years		2.18			1,372,953		1,369,884		3.05			79,569		80,358
Total		2.08	%	$	2,105,100	$	2,103,828		2.98	%	$	120,520	$	122,458

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.

	Three Months Ended					Nine Months Ended
	September 30					September 30
(Dollars in thousands)	2014		2013			2014		2013
Realized gains	$	582	$	—		$	609	$	2,369
Realized losses		—		(3	)		—		(110	)
Net realized gains (losses)	$	582	$	(3	)	$	609	$	2,259

Schedule of Securities in Other Assets on Company's Consolidated Balance Sheets

At September 30, 2014 and December 31, 2013, the Company included the following securities in “Other assets” on the consolidated balance sheets:

	September 30		December 31
(Dollars in thousands)	2014		2013
Federal Home Loan Bank (FHLB) stock	$	41,011	$	24,369
Federal Reserve Bank (FRB) stock		34,348		28,098
Other investments		1,306		1,306
Total	$	76,665	$	53,773

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Basis of Presentation

9 Months Ended

Sep. 30, 2014

Accounting Policies [Abstract]

Basis of Presentation

NOTE 1 – BASIS OF PRESENTATION

The accompanying unaudited consolidated financial statements have been prepared in accordance with generally accepted accounting principles for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include information or footnotes necessary for a complete presentation of financial position, results of operations and cash flows in conformity with generally accepted accounting principles. These interim financial statements should be read in conjunction with the audited consolidated financial statements and note disclosures for IBERIABANK Corporation (the “Company”) previously filed with the Securities and Exchange Commission (the “SEC”) in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013.

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, valuation of and accounting for acquired loans, and valuation of goodwill, intangible assets and other purchase accounting adjustments.

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.

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. Examples may include certain collateralized mortgage and debt obligations.

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). See Note 17 for additional information related to mortgage loans held for sale.

Impaired loans

Loans are measured for impairment using the methods permitted by Accounting Standards Codification (‘‘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 September 30, 2014 and December 31, 2013 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 $0.5 million and $1.4 million in earnings for the three months ended September 30, 2014 and 2013, respectively, and $1.9 million and $4.0 million for the nine months ended September 30, 2014 and 2013, 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 lock commitments 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 lock commitments, forward sales contracts, 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. See Note 12 for further discussion and details related to derivative financial instruments.

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Loans Receivable (Tables)

9 Months Ended

Sep. 30, 2014

Schedule of Non-Covered and Covered Loans

Loans receivable consist of the following, segregated into non-covered and covered loans, for the periods indicated:

	September 30, 2014
(Dollars in thousands)	Non-covered loans		Covered loans		Total
Commercial loans:
Real estate	$	4,032,419	$	247,156	$	4,279,575
Business		3,193,098		34,234		3,227,332
		7,225,517		281,390		7,506,907
Residential mortgage loans:
Residential 1-4 family		911,099		130,976		1,042,075
Construction / Owner Occupied		27,888		—		27,888
		938,987		130,976		1,069,963
Consumer and other loans:
Home equity		1,458,067		107,811		1,565,878
Indirect automobile		394,691		—		394,691
Other		537,748		4,012		541,760
		2,390,506		111,823		2,502,329
Total	$	10,555,010	$	524,189	$	11,079,199
	December 31, 2013
(Dollars in thousands)	Non-covered loans		Covered loans		Total
Commercial loans:
Real estate	$	3,479,973	$	387,332	$	3,867,305
Business		2,959,088		37,025		2,996,113
		6,439,061		424,357		6,863,418
Residential mortgage loans:
Residential 1-4 family		423,057		154,025		577,082
Construction / Owner Occupied		9,450		—		9,450
		432,507		154,025		586,532
Consumer and other loans:
Home equity		1,154,670		137,122		1,291,792
Indirect automobile		375,236		—		375,236
Other		370,752		4,289		375,041
		1,900,658		141,411		2,042,069
Total	$	8,772,226	$	719,793	$	9,492,019

Schedule of Non-Covered Loans on Nonaccrual Status

The following table provides the recorded investment of non-covered loans, excluding acquired loans, on non-accrual status at September 30, 2014 and December 31, 2013.

	September 30		December 31
(Dollars in thousands)	2014		2013
Commercial real estate construction	$	1,317	$	1,803
Commercial real estate—other		6,789		7,648
Commercial business		2,737		15,020
Residential prime		10,973		8,611
Residential subprime		6,197		1,626
Home equity		7,306		6,808
Indirect automobile		1,338		1,275
Credit card		987		411
Other		416		485
Total	$	38,060	$	43,687

Schedule of Carrying Amount of Acquired Covered Loans

The carrying amount of the acquired covered loans at September 30, 2014 and December 31, 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.

	September 30, 2014
	Acquired		Acquired		Total
	Impaired		Performing		Covered
(Dollars in thousands)	Loans		Loans		Loans
Commercial loans:
Real estate	$	4,678	$	242,478	$	247,156
Business		620		33,614		34,234
		5,298		276,092		281,390
Residential mortgage loans:
Residential 1-4 family		24,304		106,672		130,976
Construction / Owner Occupied		—		—		—
		24,304		106,672		130,976
Consumer and other loans:
Home equity		16,210		91,601		107,811
Indirect automobile		—		—		—
Other		489		3,523		4,012
		16,699		95,124		111,823
Total	$	46,301	$	477,888	$	524,189
	December 31, 2013
	Acquired		Acquired		Total
	Impaired		Performing		Covered
(Dollars in thousands)	Loans		Loans		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

The Company acquired loans (both covered and non-covered) through previous acquisitions, which are subject to ASC Topic 310-30.

As discussed in Note 4, during 2014, the Company acquired loans of $86.5 million from Trust One-Memphis, $699.6 million from Teche, and $294.8 million from First Private in the current period. Acquired loans totaling $1.0 billion are accounted for under ASC Topic 310-10, while the carrying amounts of the loans acquired in the current period subject to ASC Topic 310-30 are detailed in the following table as of the purchase date. The allocation of loans acquired from both Teche and First Private between loans subject to ASC Topic 310-30 and those subject to ASC Topic 310-10 is preliminary and subject to change up to one year after the acquisition date as information on these loans becomes available.

	Acquired			Acquired			Total
	Impaired			Performing			Acquired
(Dollars in thousands)	Loans			Loans			Loans
Contractually required principal and interest at acquisition	$	82,967		$	15,130		$	98,097
Nonaccretable difference (expected losses and foregone interest)		(4,197	)		(361	)		(4,558	)
Cash flows expected to be collected at acquisition		78,770			14,769			93,539
Accretable yield		(8,242	)		(1,536	)		(9,778	)
Basis in acquired loans at acquisition	$	70,528		$	13,233		$	83,761

Summary of Changes in Accretable Yields of Acquired Loans

The following is a summary of changes in the accretable difference of acquired loans during the nine months ended September 30, 2014 and 2013.

	September 30, 2014
	Acquired			Acquired			Total
	Impaired			Performing			Acquired
(Dollars in thousands)	Loans			Loans			Loans
Balance at beginning of period	$	78,349		$	276,543		$	354,892
Acquisition		8,242			1,536			9,778
Transfers from nonaccretable difference to accretable yield		3,952			13,872			17,824
Accretion		(12,766	)		(66,590	)		(79,356	)
Changes in expected cash flows not affecting nonaccretable differences (1)		(6,873	)		(19,377	)		(26,250	)
Balance at end of period	$	70,904		$	205,984		$	276,888
	September 30, 2013
	Acquired			Acquired			Total
	Impaired			Performing			Acquired
	Loans			Loans			Loans
Balance at beginning of period	$	76,623		$	279,770		$	356,393
Transfers from nonaccretable difference to accretable yield		6,148			34,480			40,628
Accretion		(13,519	)		(119,193	)		(132,712	)
Changes in expected cash flows not affecting nonaccretable differences (1)		10,561			81,173			91,734
Balance at end of period	$	79,813		$	276,230		$	356,043

⁽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 Troubled Debt Restructurings

Information about the Company’s troubled debt restructurings (“TDRs”) at September 30, 2014 and 2013 is presented in the following tables. 

	September 30, 2014								September 30, 2013
	Accruing Loans								Accruing Loans
			Past Due		Nonaccrual						Past Due		Nonaccrual
(Dollars in thousands)	Current		> 30 days		TDRs		Total TDRs		Current		> 30 days		TDRs		Total TDRs
Commercial real estate construction	$	—	$	—	$	—	$	—	$	—		—		—		—
Commercial real estate—other		367		—		58		425		411		—		5,601		6,012
Commercial business		726		—		2,027		2,753		1,056		—		12,610		13,666
Residential prime		—		—		—		—		—		—		—		—
Residential subprime		—		—		—		—		—		—		—		—
Home equity		—		—		243		243		—		—		263		263
Indirect automobile		—		—		—		—		—		—		—		—
Credit card		—		—		—		—		—		—		—		—
Other		—		—		—		—		—		—		—		—
Total	$	1,093	$	—	$	2,328	$	3,421	$	1,467	$	—	$	18,474	$	19,941

TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock

The following table provides information on how the TDRs were modified during the nine months ended September 30:

(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		—		—
Other concession(s) (1)		—		11,210
Total	$	—	$	11,210

⁽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.

	September 30, 2014						September 30, 2013
			Pre-modification		Post-modification				Pre-modification		Post-modification
			Outstanding		Outstanding				Outstanding		Outstanding
	Number of		Recorded		Recorded		Number of		Recorded		Recorded
(In thousands, except number of loans)	Loans		Investment		Investment (1)		Loans		Investment		Investment (1)
Commercial real estate		—	$	—	$	—		5	$	12,507	$	12,329
Total		—	$	—	$	—		5	$	12,507	$	12,329

⁽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.

	September 30, 2014				September 30, 2013
	Number of		Recorded		Number of		Recorded
(In thousands, except number of loans)	Loans		Investment		Loans		Investment
Commercial real estate		31	$	58		45	$	6,012
Commercial business		11		1,767		13		12,370
Residential prime		—		—		—		—
Home Equity		—		—		1		47
Indirect automobile		—		—		—		—
Credit card		—		—		—		—
Other		1		—		1		—
Total		43	$	1,825		60	$	18,429

Non-Covered Loans Excluding Acquired Loans [Member]

Schedule of Aging of Non-Covered Loans

The following tables provide an analysis of the aging of non-covered loans as of September 30, 2014 and December 31, 2013.  

	September 30, 2014
	Non-covered loans excluding acquired loans
											Total Non-covered		Recorded
	Past Due (1)										Loans, Net of		Investment > 90 days
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total		Current		Unearned Income		and Accruing
Commercial real estate construction	$	84	$	—	$	1,317	$	1,401	$	634,593	$	635,994	$	—
Commercial real estate—other		1,347		640		6,789		8,776		2,882,842		2,891,618		—
Commercial business		1,475		44		2,737		4,256		3,089,617		3,093,873		—
Residential prime		1,859		1,349		10,973		14,181		362,513		376,694		—
Residential subprime		—		2		6,197		6,199		114,182		120,381		—
Home equity		1,783		201		7,310		9,294		1,220,704		1,229,998		4
Indirect automobile		1,825		502		1,338		3,665		390,413		394,078		—
Credit card		149		123		987		1,259		67,472		68,731		—
Other		720		337		416		1,473		367,102		368,575		—
Total	$	9,242	$	3,198	$	38,064	$	50,504	$	9,129,438	$	9,179,942	$	4
	December 31, 2013
	Non-covered loans excluding acquired loans
											Total Non-covered		Recorded
	Past Due (1)										Loans, Net of		Investment > 90 days
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total		Current		Unearned Income		and Accruing
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 prime		1,104		852		9,684		11,640		286,167		297,807		1,073
Residential subprime		—		—		1,626		1,626		114,939		116,565		—
Home equity		1,956		569		6,808		9,333		1,091,894		1,101,227		—
Indirect automobile		1,427		293		1,275		2,995		370,388		373,383		—
Credit card		266		92		411		769		62,873		63,642		—
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 include loans on nonaccrual 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

	September 30, 2014
	Non-covered acquired loans
														Total Non-covered		Recorded
	Past Due (1)													Loans, Net of		Investment > 90 days
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total		Current		Discount/ Premium			Unearned Income		and Accruing
Commercial real estate construction	$	340	$	45	$	2,118	$	2,503	$	36,832	$	(2,061	)	$	37,274	$	1,821
Commercial real estate—other		1,464		277		22,081		23,822		486,238		(42,527	)		467,533		20,614
Commercial business		717		25		1,905		2,647		101,722		(5,144	)		99,225		1,892
Residential prime		76		931		7,437		8,444		432,837		631			441,912		369
Home equity		1,615		1,003		8,203		10,821		228,051		(10,803	)		228,069		4,102
Indirect automobile		7		1		43		51		606		(44	)		613		43
Other		337		7		2,051		2,395		109,599		(11,552	)		100,442		389
Total	$	4,556	$	2,289	$	43,838	$	50,683	$	1,395,885	$	(71,500	)	$	1,375,068	$	29,230
	December 31, 2013
	Non-covered acquired loans
														Total Non-covered		Recorded
	Past Due (1)													Loans, Net of		Investment > 90 days
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total		Current		Discount/ Premium			Unearned Income		and Accruing
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 prime		—		—		226		226		18,796		(887	)		18,135		226
Home equity		313		516		4,242		5,071		53,995		(5,623	)		53,443		4,242
Indirect automobile		33		—		95		128		1,725		—			1,853		95
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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Goodwill and Other Acquired Intangible Assets - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Title plant assets	$ 6.7	$ 6.7

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Capital Requirements and Other Regulatory Matters (Tables)

9 Months Ended

Sep. 30, 2014

Banking and Thrift [Abstract]

Actual Capital Amounts and Ratios

 The Company’s and IBERIABANK’s actual capital amounts and ratios as of September 30, 2014 and December 31, 2013 are presented in the following table.

(Dollars in thousands)	September 30, 2014
	Minimum					Well Capitalized					Actual
	Amount		Ratio			Amount		Ratio			Amount		Ratio
Tier 1 Leverage
Consolidated	$	596,945		4.00	%	$	N/A		N/A	%	$	1,376,283		9.22	%
IBERIABANK		594,578		4.00			743,223		5.00			1,225,980		8.25
Tier 1 risk-based capital
Consolidated		490,391		4.00	%	$	N/A		N/A	%	$	1,376,283		11.23	%
IBERIABANK		489,049		4.00			733,574		6.00			1,225,980		10.03
Total risk-based capital
Consolidated		980,781		8.00	%	$	N/A		N/A	%	$	1,522,932		12.42	%
IBERIABANK		978,099		8.00			1,222,624		10.00			1,372,629		11.23

	December 31, 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 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				0 Months Ended	9 Months Ended		0 Months Ended	9 Months Ended
	Jan. 17, 2014	Sep. 30, 2014	Dec. 31, 2013	Dec. 31, 2012	May 31, 2014 Teche [Member]	Sep. 30, 2014 Teche [Member]	May 31, 2014 Teche [Member]	Jun. 30, 2014 First Private [Member]	Sep. 30, 2014 First Private [Member]	Jun. 30, 2014 First Private [Member]
Equity consideration
Common stock issued, Amount						$ 156,026			$ 58,639
Common stock issued, Number of Shares						2,498,007			847,509
Total equity consideration						156,026			58,639
Non-Equity consideration
Cash	91,600					714			1
Total consideration paid					156,700	156,740		58,600	58,640
Fair value of net assets assumed including identifiable intangible assets						71,954
Fair value of net liabilities assumed including identifiable intangible assets									28,029
Goodwill	$ 8,600	$ 526,242	$ 401,872	$ 401,872		$ 84,786	$ 84,800		$ 30,611	$ 30,600

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Loans Receivable - Schedule of Modified TDRs (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Receivables [Abstract]
Extended maturities
Interest rate adjustment
Maturity and interest rate adjustment
Movement to or extension of interest-rate only payments
Forbearance
Other concession(s)		11,210
Total		$ 11,210

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Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Assets
Cash and due from banks	$ 257,147	$ 238,672
Interest-bearing deposits in banks	410,860	152,724
Total cash and cash equivalents	668,007	391,396
Securities available for sale, at fair value	2,103,828	1,936,797
Securities held to maturity (fair values of $122,458 and $152,566, respectively)	120,520	154,109
Mortgage loans held for sale ($148,530 and $97,273 recorded at fair value, respectively)	148,530	128,442
Loans covered by loss share agreements	524,189	719,793
Non-covered loans, net of unearned income	10,555,010	8,772,226
Total loans, net of unearned income	11,079,199	9,492,019
Allowance for loan losses	(134,540)	(143,074)
Loans, net	10,944,659	9,348,945
FDIC loss share receivables	94,712	162,312
Premises and equipment, net	307,868	287,510
Goodwill	526,242	401,872
Other assets	602,243	554,167
Total Assets	15,516,609	13,365,550
Liabilities
Non-interest-bearing	3,157,453	2,575,939
Interest-bearing	9,220,322	8,161,061
Total deposits	12,377,775	10,737,000
Short-term borrowings	812,783	680,344
Long-term debt	355,569	280,699
Other liabilities	152,934	136,528
Total Liabilities	13,699,061	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	1,394,618	1,178,284
Retained earnings	473,885	436,141
Accumulated other comprehensive income (loss)	(256)	(16,491)
Treasury stock at cost-1,822,042 and 2,130,841 shares, respectively	(85,962)	(98,872)
Total Shareholders' Equity	1,817,548	1,530,979
Total Liabilities and Shareholders' Equity	$ 15,516,609	$ 13,365,550

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Business Segments (Tables)

9 Months Ended

Sep. 30, 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.

	Three Months Ended September 30, 2014
(Dollars in thousands)	IBERIABANK			IMC			LTC			Consolidated
Interest income	$	131,362		$	1,804		$	1		$	133,167
Interest expense		11,501			625			—			12,126
Net interest income		119,861			1,179			1			121,041
Provision for loan losses		5,621			93			—			5,714
Mortgage income		(5	)		12,819			—			12,814
Title income		—			—			5,577			5,577
Other non-interest income		27,311			(37	)		(2	)		27,272
Core deposit intangible amortization		1,429			—			—			1,429
Allocated expenses		(2,386	)		1,697			689			—
Other non-interest expenses		102,692			11,624			4,315			118,631
Income before income taxes		39,811			547			572			40,930
Income tax expense		10,739			217			230			11,186
Net income	$	29,072		$	330		$	342		$	29,744
Total loans and loans held for sale	$	11,055,809		$	171,920		$	—		$	11,227,729
Total assets		15,288,157			202,923			25,529			15,516,609
Total deposits		12,371,606			6,169			—			12,377,775
Average assets		15,239,174			213,936			25,296			15,478,406

	Three Months Ended September 30, 2013
(Dollars in thousands)	IBERIABANK			IMC		LTC		Consolidated
Interest income	$	107,051		$	1,459	$	2	$	108,512
Interest expense		10,731			329		—		11,060
Net interest income		96,320			1,130		2		97,452
Provision for loan losses		1,868			146		—		2,014
Mortgage income		5			15,197		—		15,202
Title income		—			—		5,482		5,482
Other non-interest income		22,579			—		—		22,579
Core deposit intangible amortization		1,125			—		—		1,125
Allocated expenses		(2,658	)		1,933		725		—
Other non-interest expenses		90,858			12,016		4,153		107,027
Income before income taxes		27,711			2,232		606		30,549
Income tax expense		6,228			877		252		7,357
Net income	$	21,483		$	1,355	$	354	$	23,192
Total loans and loans held for sale	$	9,024,959		$	126,363	$	—	$	9,151,322
Total assets		12,965,373			153,402		26,302		13,145,077
Total deposits		10,946,453			4,311		—		10,950,764
Average assets		12,761,165			157,144		26,126		12,944,435

	Nine Months Ended September 30, 2014
(Dollars in thousands)	IBERIABANK			IMC			LTC			Consolidated
Interest income	$	362,054		$	4,563		$	2		$	366,619
Interest expense		30,869			1,323			—			32,192
Net interest income		331,185			3,240			2			334,427
Provision for loan losses		12,481			84			—			12,565
Mortgage income		80			40,823			—			40,903
Title income		—			—			15,007			15,007
Other non-interest income		73,460			(61	)		(2	)		73,397
Core deposit intangible amortization		3,779			—			—			3,779
Allocated expenses		(9,110	)		6,432			2,678			—
Other non-interest expenses		305,121			33,558			12,405			351,084
Income (loss) before income taxes		92,454			3,928			(76	)		96,306
Income tax expense (benefit)		24,081			1,552			(14	)		25,619
Net income (loss)	$	68,373		$	2,376		$	(62	)	$	70,687
Total loans and loans held for sale	$	11,055,809		$	171,920		$	—		$	11,227,729
Total assets		15,288,157			202,923			25,529			15,516,609
Total deposits		12,371,606			6,169			—			12,377,775
Average assets		14,097,930			179,218			25,003			14,302,151

	Nine Months Ended September 30, 2013
(Dollars in thousands)	IBERIABANK			IMC			LTC		Consolidated
Interest income	$	318,646		$	4,428		$	31	$	323,105
Interest expense		34,786			1,513			—		36,299
Net interest income		283,860			2,915			31		286,806
Provision for loan losses		320			125			—		445
Mortgage income		2			51,839			—		51,841
Title income		—			—			16,199		16,199
Other non-interest income		62,206			(4	)		—		62,202
Core deposit intangible amortization		3,375			—			—		3,375
Allocated expenses		(4,402	)		3,213			1,189		—
Other non-interest expenses		315,332			38,942			12,761		367,035
Income before income taxes		31,443			12,470			2,280		46,193
Income tax expense (benefit)		884			4,897			913		6,694
Net income	$	30,559		$	7,573		$	1,367	$	39,499
Total loans and loans held for sale	$	9,024,959		$	126,363		$	—	$	9,151,322
Total assets		12,965,373			153,402			26,302		13,145,077
Total deposits		10,946,453			4,311			—		10,950,764
Average assets		12,747,602			193,463			25,454		12,966,519

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Share-Based Compensation - Activity Related to Stock Options (Detail) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
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
Number of shares, Outstanding options, Granted	77,098	75,722
Number of shares, Outstanding options, Exercised	(234,363)	(142,841)
Number of shares, Outstanding options, Forfeited or expired	(13,446)	(36,608)
Number of shares, Outstanding options, Ending balance	902,118	1,132,348
Number of shares, Exercisable options	581,423	749,545
Weighted Average Exercise Price, Outstanding options, Beginning balance	$ 53.47	$ 51.48
Weighted Average Exercise Price, Outstanding options, Granted	$ 65.30	$ 52.36
Weighted Average Exercise Price, Outstanding options, Exercised	$ 48.36	$ 38.09
Weighted Average Exercise Price, Outstanding options, Forfeited or expired	$ 60.82	$ 56.01
Weighted Average Exercise Price, Outstanding options, Ending balance	$ 55.70	$ 53.09
Weighted Average Exercise Price, Exercisable options	$ 55.65	$ 52.94
Weighted Average Remaining Contract Life, Outstanding options	5 years 2 months 12 days	4 years 8 months 12 days
Weighted Average Remaining Contract Life, Exercisable options	3 years 9 months 18 days	3 years 2 months 12 days

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Subsequent Events - Additional Information (Detail) (Subsequent Events [Member], USD $)	3 Months Ended
	Dec. 30, 2014 Florida Bank Group, Inc. [Member]	Dec. 31, 2014 Old Florida Bancshares, Inc. [Member]
Subsequent Event [Line Items]
Cash paid per share	$ 7.81
Shares received	0.149	0.34

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Consolidated Statements of Shareholders' Equity (Parenthetical) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash dividends declared per share	$ 1.02	$ 1.02
Retained Earnings [Member]
Cash dividends declared per share	$ 1.02	$ 1.02

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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	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Compensation expense related to stock options	$ 508	$ 526	$ 1,545	$ 1,592
Income tax benefit related to stock options	$ 178	$ 184	$ 541	$ 557
Impact on basic earnings per share	$ 0.01	$ 0.01	$ 0.03	$ 0.03
Impact on diluted earnings per share	$ 0.01	$ 0.01	$ 0.03	$ 0.03

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Investment Securities - Schedule of Securities with Gross Unrealized Losses Aggregated by Investment Category (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Net Investment Income [Line Items]
Securities available for sale, Less Than Twelve Months, Gross Unrealized Losses	$ (2,846)	$ (35,543)
Securities available for sale, Less Than Twelve Months, Estimated Fair Value	552,543	1,165,829
Securities available for sale, Over Twelve Months, Gross Unrealized Losses	(15,418)	(4,573)
Securities available for sale, Over Twelve Months, Estimated Fair Value	592,316	88,432
Securities available for sale, Gross Unrealized Losses, Total	(18,264)	(40,116)
Securities available for sale, Estimated Fair Value, Total	1,144,859	1,254,261
Securities held to maturity, Less Than Twelve Months, Gross Unrealized Losses	(1)	(2,133)
Securities held to maturity, Less Than Twelve Months, Estimated Fair Value	636	42,268
Securities held to maturity, Over Twelve Months, Gross Unrealized Losses	(1,459)	(1,615)
Securities held to maturity, Over Twelve Months, Estimated Fair Value	35,114	17,856
Securities held to maturity, Gross Unrealized Losses, Total	(1,460)	(3,748)
Securities held to maturity, Estimated Fair Value, Total	35,750	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		(30)
Securities available for sale, Less Than Twelve Months, Estimated Fair Value	186	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		(256)
Securities available for sale, Estimated Fair Value, Total	186	3,462
Securities held to maturity, Less Than Twelve Months, Gross Unrealized Losses	(1)	(1,181)
Securities held to maturity, Less Than Twelve Months, Estimated Fair Value	564	29,355
Securities held to maturity, Over Twelve Months, Gross Unrealized Losses	(265)	(443)
Securities held to maturity, Over Twelve Months, Estimated Fair Value	10,811	6,240
Securities held to maturity, Gross Unrealized Losses, Total	(266)	(1,624)
Securities held to maturity, Estimated Fair Value, Total	11,375	35,595
Mortgage-Backed Securities [Member]
Net Investment Income [Line Items]
Securities available for sale, Less Than Twelve Months, Gross Unrealized Losses	(2,846)	(23,749)
Securities available for sale, Less Than Twelve Months, Estimated Fair Value	552,357	864,899
Securities available for sale, Over Twelve Months, Gross Unrealized Losses	(9,492)	(4,198)
Securities available for sale, Over Twelve Months, Estimated Fair Value	333,795	81,870
Securities available for sale, Gross Unrealized Losses, Total	(12,338)	(27,947)
Securities available for sale, Estimated Fair Value, Total	886,152	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	72	12,913
Securities held to maturity, Over Twelve Months, Gross Unrealized Losses	(1,194)	(1,172)
Securities held to maturity, Over Twelve Months, Estimated Fair Value	24,303	11,616
Securities held to maturity, Gross Unrealized Losses, Total	(1,194)	(2,124)
Securities held to maturity, Estimated Fair Value, Total	24,375	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	(5,926)	(149)
Securities available for sale, Over Twelve Months, Estimated Fair Value	258,521	5,515
Securities available for sale, Gross Unrealized Losses, Total	(5,926)	(11,913)
Securities available for sale, Estimated Fair Value, Total	$ 258,521	$ 304,030

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Share-Based Compensation - Compensation Expense of Phantom Stock (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense related to phantom stock	$ 508	$ 526	$ 1,545	$ 1,592
Phantom Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense related to phantom stock	$ 619	$ 792	$ 3,692	$ 2,602

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Transfers and Servicing of Financial Assets (Including Mortgage Banking Activity) (Tables)

9 Months Ended

Sep. 30, 2014

Transfers and Servicing [Abstract]

Components of Mortgage Banking Activity

The following table details the mortgage banking activity as of and for the nine months ended September 30:

(Dollars in thousands)	2014			2013
Balance at beginning of period	$	128,442		$	267,475
Originations and purchases		1,218,684			1,712,557
Sales, net of gains		(1,193,282	)		(1,871,747	)
Other		(5,314	)		—
Balance at end of period	$	148,530		$	108,285

(Dollars in thousands)	2014			2013
Fair value changes of derivatives and mortgage loans held for sale, net	$	(1,081	)	$	(270	)
Gains on sales		41,412			51,709
Servicing and other income, net		572			402
Total mortgage income	$	40,903		$	51,841

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Loans Receivable - Additional Information (Detail) (USD $)	9 Months Ended					9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Trust One- Memphis [Member]	Sep. 30, 2014 Teche [Member]	Sep. 30, 2014 First Private [Member]	Sep. 30, 2014 Troubled Debt Restructurings [Member]	Sep. 30, 2013 Troubled Debt Restructurings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Deferred loan origination fees	$ 19,400,000	$ 18,600,000
Deferred loan expenses	9,000,000	7,600,000
Deposit liabilities reclassified as loans receivable	3,700,000	3,100,000
Loans with carrying value pledged to secure public deposits and other borrowings	2,700,000,000	2,300,000,000
Acquired loans			86,500,000	699,600,000	294,800,000
Carrying amounts of loans acquired	1,100,000,000
Maximum period for subject to change estimated fair values after acquisition date	1 year
Total TDRs						$ 0	$ 11,200,000

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Share-Based Compensation

9 Months Ended

Sep. 30, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-Based Compensation

NOTE 15 – 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 nine months ended September 30, 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 September 30, 2014, future option or restricted stock awards of 1,040,092 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 three-month and nine-month periods ended September 30:

	For the Three Months Ended				For the Nine Months Ended
	September 30				September 30
(Dollars in thousands, except per share data)	2014		2013		2014		2013
Compensation expense related to stock options	$	508	$	526	$	1,545	$	1,592
Income tax benefit related to stock options		178		184		541		557
Impact on basic earnings per share		0.01		0.01		0.03		0.03
Impact on diluted earnings per share		0.01		0.01		0.03		0.03

The Company reported $1.2 million and $0.5 million of excess tax benefits as financing cash inflows during the nine months ended September 30, 2014 and 2013, respectively, related to the exercise and vesting of stock options. Net cash proceeds from the exercise of stock options were $11.1 million and $5.4 million for the nine months ended September 30, 2014 and 2013, respectively.

The Company uses the Black-Scholes option pricing model to estimate the fair value of share-based awards. The following weighted-average assumptions were used for option awards outstanding during the nine-month periods ended September 30:

	2014			2013
Expected dividends		2.1	%		2.6	%
Expected volatility		35.8	%		34.8	%
Risk-free interest rate		2.3	%		1.7	%
Expected term (in years)		7.5			8.6
Weighted-average grant-date fair value	$	21.25		$	15.37

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 September 30, 2014, there was $3.7 million of unrecognized compensation cost related to stock options that is expected to be recognized over a weighted-average period of 5.2 years.

The following table represents the activity related to stock options during the periods indicated.

				Weighted Average		Weighted Average
	Number of shares			Exercise Price		Remaining Contract Life
Outstanding options, December 31, 2012		1,236,075		$	51.48
Granted		75,722			52.36
Exercised		(142,841	)		38.09
Forfeited or expired		(36,608	)		56.01
Outstanding options, September 30, 2013		1,132,348		$	53.09		4.7 Years
Exercisable options, September 30, 2013		749,545			52.94		3.2 Years
Outstanding options, December 31, 2013		1,072,829		$	53.47
Granted		77,098			65.30
Exercised		(234,363	)		48.36
Forfeited or expired		(13,446	)		60.82
Outstanding options, September 30, 2014		902,118		$	55.70		5.2 Years
Exercisable options, September 30, 2014		581,423			55.65		3.8 Years

At September 30, 2014, the aggregate intrinsic value of shares underlying outstanding stock options and underlying exercisable stock options was $6.8 million and $4.4 million, respectively. Total intrinsic value of options exercised was $4.1 million and $1.9 million for the nine months ended September 30, 2014 and 2013, respectively.

Restricted stock awards

The Company issues restricted stock under various plans for certain officers and directors. A supplemental stock benefit plan adopted in 1999 and the 2001, 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 September 30, 2014 and 2013, unearned share-based compensation associated with these awards totaled $22.2 million and $23.3 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 Three Months Ended September 30				For the Nine Months Ended September 30
(Dollars in thousands)	2014		2013		2014		2013
Compensation expense related to restricted stock	$	2,497	$	2,212	$	7,382	$	6,407

The following table represents unvested restricted stock award activity for the nine months ended September 30:

	2014			2013
Balance at beginning of period		523,756			538,202
Granted		146,547			166,223
Forfeited		(18,171	)		(27,483	)
Earned and issued		(152,112	)		(136,629	)
Balance at end of period		500,020			540,313

Phantom stock awards

As part of the IBKC Phantom Award Plan and 2009 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 the end of the periods indicated and the current market price of the Company’s stock at that time.

	For the Three Months Ended September 30				For the Nine Months Ended September 30
(Dollars in thousands)	2014		2013		2014		2013
Compensation expense related to phantom stock	$	619	$	792	$	3,692	$	2,602

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, 2012		318,729			16,035			334,764		$	16,444,000
Granted		166,664			8,793			175,457			9,108,000
Forfeited share equivalents		(16,381	)		(681	)		(17,062	)		(886,000	)
Vested share equivalents		(45,065	)		(3,327	)		(48,392	)		(2,453,000	)
Balance, September 30, 2013		423,947			20,820			444,767		$	23,088,000
Balance, December 31, 2013		417,238			22,351			439,589		$	27,628,000
Granted		115,620			7,147			122,767			7,674,000
Forfeited share equivalents		(19,498	)		(1,751	)		(21,249	)		(1,328,000	)
Vested share equivalents		(68,480	)		(6,615	)		(75,095	)		(5,002,000	)
Balance, September 30, 2014		444,880			21,132			466,012		$	29,130,000

⁽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 $62.51 and $51.91 on September 30, 2014 and 2013, respectively.

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Goodwill and Other Acquired Intangible Assets (Tables)

9 Months Ended

Sep. 30, 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 sheet as of the periods indicated:

	September 30, 2014							December 31, 2013
	Gross Carrying		Accumulated			Net Carrying		Gross Carrying		Accumulated			Net Carrying
(Dollars in thousands)	Amount		Amortization			Amount		Amount		Amortization			Amount
Core deposit intangibles	$	50,564	$	(34,564	)	$	16,000	$	45,406	$	(30,784	)	$	14,622
Customer relationship intangible asset		1,348		(777	)		571		1,348		(631	)		717
Non-compete agreement		163		(53	)		110		—		—			—
Other intangible assets		205		(29	)		176		—		—			—
Total	$	52,280	$	(35,423	)	$	16,857	$	46,754	$	(31,415	)	$	15,339

Schedule of Carrying Amount of Goodwill

Changes to the carrying amount of goodwill by reportable segment for the nine months ended September 30, 2014 and the year ended December 31, 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 period		123,995		—		375		124,370
Balance, September 30, 2014	$	497,900	$	23,178	$	5,164	$	526,242

Mortgage Servicing Rights [Member]

Schedule of Definite-Lived Intangible Assets

Mortgage servicing rights had the following carrying values as of the periods indicated:

	September 30, 2014							December 31, 2013
	Gross Carrying		Accumulated			Net Carrying		Gross Carrying		Accumulated			Net Carrying
(Dollars in thousands)	Amount		Amortization			Amount		Amount		Amortization			Amount
Mortgage servicing rights	$	2,787	$	(1,020	)	$	1,767	$	2,146	$	(638	)	$	1,508

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Share-Based Compensation - Unvested Restricted Stock Award Activity (Detail)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Balance at beginning of period	523,756	538,202
Granted	146,547	166,223
Forfeited	(18,171)	(27,483)
Earned and issued	(152,112)	(136,629)
Balance at end of period	500,020	540,313

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Fair Value Measurements

9 Months Ended

Sep. 30, 2014

Fair Value Disclosures [Abstract]

Fair Value Measurements

NOTE 17 – 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 has 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:

	September 30, 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	$	148,530	$	142,381	$	6,149	$	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 three-month period ended September 30, 2014 totaled $1.6 million, while net gains resulting from the change in fair value of these loans were $4.0 million for the nine-month period ended September 30, 2014. There were no net gains or losses recorded in mortgage income for the corresponding periods ended September 30, 2013 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)	September 30, 2014
	(Level 1)		(Level 2)		(Level 3)		Total
Assets
Available for sale securities	$	46,261	$	2,057,567	$	—	$	2,103,828
Mortgage loans held for sale		—		148,530		—		148,530
Derivative instruments		—		32,290		—		32,290
Total	$	46,261	$	2,238,387	$	—	$	2,284,648
Liabilities
Derivative instruments		—		29,840		—		29,840
Total	$	—	$	29,840	$	—	$	29,840
	December 31, 2013
	(Level 1)		(Level 2)		(Level 3)		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

Available for sale securities with a market value of $14.7 million at September 30, 2014 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 changes in net assets) 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 (or changes in net assets)	$	(1,697	)	$	—
Change in unrealized gains (losses) relating to assets still held at September 30, 2014		—			16,235

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)	September 30, 2014
	(Level 1)		(Level 2)		(Level 3)		Total
Assets
Loans	$	—	$	1,086	$	—	$	1,086
OREO		—		6,974		—		6,974
Total	$	—	$	8,060	$	—	$	8,060
(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).

In accordance with the provisions of ASC Topic 310-30, the Company records certain loans considered impaired at their estimated fair value. A loan is considered impaired if it is probable the Company will be unable to collect all amounts due according to the contractual terms of the loan agreement. Fair value is measured at the estimated fair value of the collateral for collateral-dependent loans. Impaired non-covered loans with an outstanding balance of $1.1 million and $4.1 million were recorded at their fair value at September 30, 2014 and December 31, 2013, respectively. These loans include a reserve of $25 thousand and $1.0 million included in the Company’s allowance for credit losses at September 30, 2014 and December 31, 2013, respectively.

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 statement of comprehensive income for the nine months ended September 30, 2014 and the year ended December 31, 2013. After the impairment losses, the carrying value of the closed branches was $3.1 million and $5.1 million at September 30, 2014 and December 31, 2013, respectively, and is included in OREO (as real estate acquired for development or resale) on the Company’s consolidated balance sheet.

The Company did not record any liabilities at fair value for which measurement of the fair value was made on a nonrecurring basis at September 30, 2014 and December 31, 2013.

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Loans Receivable - Schedule of Carrying Amount of Acquired Covered Loans (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Impaired Loans	$ 46,301	$ 66,077
Acquired Performing Loans	477,888	653,716
Balance at end of period	524,189	719,793
Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Impaired Loans	5,298	14,904
Acquired Performing Loans	276,092	409,453
Balance at end of period	281,390	424,357
Commercial Loans [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Impaired Loans	4,678	14,904
Acquired Performing Loans	242,478	372,428
Balance at end of period	247,156	387,332
Commercial Loans [Member] | Business [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Impaired Loans	620
Acquired Performing Loans	33,614	37,025
Balance at end of period	34,234	37,025
Residential Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Impaired Loans	24,304	28,223
Acquired Performing Loans	106,672	125,802
Balance at end of period	130,976	154,025
Residential Mortgage Loans [Member] | Residential 1-4 Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Impaired Loans	24,304	28,223
Acquired Performing Loans	106,672	125,802
Balance at end of period	130,976	154,025
Residential Mortgage Loans [Member] | Construction / Owner Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Impaired Loans
Acquired Performing Loans
Balance at end of period
Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Impaired Loans	16,699	22,950
Acquired Performing Loans	95,124	118,461
Balance at end of period	111,823	141,411
Consumer and Other Loans [Member] | Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Impaired Loans	16,210	21,768
Acquired Performing Loans	91,601	115,354
Balance at end of period	107,811	137,122
Consumer and Other Loans [Member] | Indirect Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Impaired Loans
Acquired Performing Loans
Balance at end of period
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	3,523	3,107
Balance at end of period	$ 4,012	$ 4,289

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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	Sep. 30, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale, Assets	$ 148,530	$ 97,273
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, Assets	1,086	3,070
Mortgage loans held for sale, Assets		11,876
OREO, Assets	6,974	14,598
Total, Assets	8,060	29,544
Fair Value, Measurements, Nonrecurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, Assets
Mortgage loans held for sale, Assets
OREO, Assets
Total, Assets
Fair Value, Measurements, Nonrecurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, Assets	1,086	3,070
Mortgage loans held for sale, Assets		11,876
OREO, Assets	6,974	14,598
Total, Assets	8,060	29,544
Fair Value, Measurements, Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, Assets
Mortgage loans held for sale, Assets
OREO, Assets
Total, Assets

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Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash Flows from Operating Activities
Net income	$ 70,687	$ 39,499
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	12,190	19,851
Amortization of purchase accounting adjustments, net	7,899	(1,186)
Provision for loan losses	12,565	445
Share-based equity compensation expense	8,927	7,999
Loss (Gain) on sale of assets, net	7	(51)
Gain on sale of available for sale investments	(609)	(2,259)
Gain on sale of OREO, net	(3,253)	(5,211)
Loss on abandonment of fixed assets		4,941
Impairment of FDIC loss share receivables	5,097	31,813
Amortization of premium/discount on investments	10,248	15,426
Derivative (gains) losses on swaps	1	(209)
(Benefit) provision for deferred income taxes	(24,328)	(7,802)
Originations of mortgage loans held for sale	(1,218,684)	(1,712,557)
Proceeds from sales of mortgage loans held for sale	1,234,694	1,923,455
Gain on sale of mortgage loans held for sale, net	(41,412)	(51,709)
Tax benefit associated with share-based payment arrangements	(1,163)	(495)
Decrease (Increase) in other assets	21,553	(15,759)
Other operating activities, net	(14,634)	30,079
Net Cash Provided by Operating Activities	79,785	276,270
Cash Flows from Investing Activities
Proceeds from sales of securities available for sale	20,531	44,672
Proceeds from maturities, prepayments and calls of securities available for sale	413,069	618,059
Purchases of securities available for sale	(540,197)	(935,341)
Proceeds from maturities, prepayments and calls of securities held to maturity	32,880	54,372
Purchases of securities held to maturity		(5,901)
Reimbursement of recoverable covered asset losses (to) from the FDIC	(457)	56,311
Increase in loans receivable, net	(476,329)	(595,315)
Proceeds from sale of premises and equipment	6,217	7,371
Purchases of premises and equipment	(26,587)	(12,592)
Proceeds from disposition of real estate owned	69,124	76,150
Investment in tax credit entities	(10,384)	(1,696)
Cash received in excess of cash paid for acquisition	188,803
Other investing activities, net	(16,073)	8,963
Net Cash Used in Investing Activities	(339,403)	(684,947)
Cash Flows from Financing Activities
Increase in deposits, net of deposits acquired	497,970	202,959
Net change in short-term borrowings, net of borrowings acquired	77,338	(44,196)
Proceeds from long-term debt	4,637	2,230
Repayments of long-term debt	(21,012)	(143,625)
Dividends paid to shareholders	(31,701)	(30,223)
Proceeds from sale of treasury stock for stock options exercised	11,141	5,441
Payments to repurchase common stock	(3,307)	(1,933)
Common stock issued
Tax benefit associated with share-based payment arrangements	1,163	495
Net Cash Provided by (Used in) Financing Activities	536,229	(8,852)
Net Increase (Decrease) In Cash and Cash Equivalents	276,611	(417,529)
Cash and Cash Equivalents at Beginning of Period	391,396	970,977
Cash and Cash Equivalents at End of Period	668,007	553,448
Supplemental Schedule of Noncash Activities
Acquisition of real estate in settlement of loans	20,219	82,383
Common stock issued in acquisition	214,665
Transfers of property into Other Real Estate	30,442	82,383
Supplemental Disclosures Cash paid for:
Interest on deposits and borrowings	30,984	36,888
Income taxes, net	$ 42,933	$ 19,891

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Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Securities held to maturity, fair values	$ 122,458	$ 152,566
Mortgage loans held for sale recorded at fair value	$ 148,530	$ 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	1,822,042	2,130,841

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Goodwill and Other Acquired Intangible Assets

9 Months Ended

Sep. 30, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Acquired Intangible Assets

NOTE 10 – GOODWILL AND OTHER ACQUIRED INTANGIBLE ASSETS

Goodwill

Changes to the carrying amount of goodwill by reportable segment for the nine months ended September 30, 2014 and the year ended December 31, 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 period		123,995		—		375		124,370
Balance, September 30, 2014	$	497,900	$	23,178	$	5,164	$	526,242

The goodwill acquired during the nine months ended September 30, 2014 was a result of the Trust One-Memphis, Teche, First Private, and The Title Company LLC acquisitions. See Note 4 for further information. Allocation of the goodwill acquired during the nine months ended September 30, 2014 to reportable segments is preliminary and subject to change.

The Company performed the required annual goodwill impairment test as of October 1, 2013. 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 not become aware of any events or changes in circumstances that would indicate that goodwill might be impaired. The Company is currently in the process of performing its annual impairment tests as of October 1, 2014.

Title Plant

The Company held title plant assets totaling $6.7 million at both September 30, 2014 and December 31, 2013. 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 sheet as of the periods indicated:

	September 30, 2014							December 31, 2013
	Gross Carrying		Accumulated			Net Carrying		Gross Carrying		Accumulated			Net Carrying
(Dollars in thousands)	Amount		Amortization			Amount		Amount		Amortization			Amount
Core deposit intangibles	$	50,564	$	(34,564	)	$	16,000	$	45,406	$	(30,784	)	$	14,622
Customer relationship intangible asset		1,348		(777	)		571		1,348		(631	)		717
Non-compete agreement		163		(53	)		110		—		—			—
Other intangible assets		205		(29	)		176		—		—			—
Total	$	52,280	$	(35,423	)	$	16,857	$	46,754	$	(31,415	)	$	15,339

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Commitments and Contingencies - Summary of Financial Instruments Outstanding (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Loss Contingencies [Line Items]
Reserve for unfunded lending commitments	$ 12,099	$ 11,147	$ 11,959
Credit Risk Contract [Member]
Loss Contingencies [Line Items]
Commitments to grant loans	242,137	221,627
Unfunded commitments under lines of credit	3,834,107	3,326,448
Commercial and standby letters of credit	131,347	105,026
Reserve for unfunded lending commitments	$ 12,099	$ 11,147

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Share-Based Compensation - Additional Information (Detail) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
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	1,040,092
Minimum vesting period (in years)	1 year 6 months
Maximum vesting period (in years)	7 years
Excess tax benefits as financing cash inflows	1,163,000	495,000
Net cash proceeds from exercise of stock options	11,141,000	5,441,000
Aggregate intrinsic value of shares underlying outstanding stock options	6,800,000
Aggregate intrinsic value of shares underlying exercisable stock options	4,400,000
Total intrinsic value of options exercised	4,100,000	1,900,000
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unearned compensation vesting period (in years)	7 years
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unearned compensation vesting period (in years)	3 years
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unearned share-based compensation associated with awards	3,700,000
Unrecognized compensation cost related to stock options expected to be recognized over a weighted-average period	5 years 2 months 12 days
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unearned share-based compensation associated with awards	$ 22,200,000	$ 23,300,000
Phantom Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum vesting period (in years)	5 years
Maximum vesting period (in years)	7 years

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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	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Equity [Abstract]
Unrealized holding gains/losses arising during the period, Before-Tax Amount	$ (7,032)	$ 5,528	$ 25,586	$ (38,769)
Less: reclassification adjustment for losses/gains included in net income, Before-Tax Amount	(582)	3	(609)	(2,259)
Net unrealized losses/gains, Before-Tax Amount	(7,614)	5,531	24,977	(41,028)
Change in fair value of derivative instruments designated as cash flow hedges during the period, Before-Tax Amount				952
Less: reclassification adjustment for gains/losses included in net income, Before-Tax Amount				392
Fair value of derivative instruments designated as cash flow hedges, Before-Tax Amount				1,344
Total other comprehensive income/loss, Before-Tax Amount	(7,614)	5,531	24,977	(39,684)
Unrealized holding gains/losses arising during the period, Tax Expense (Benefit)	2,461	(1,935)	(8,955)	13,569
Less: reclassification adjustment for losses/gain included in net income, Tax Expense (Benefit)	204	(1)	213	791
Net unrealized gains/losses, Tax Expense (Benefit)	2,665	(1,936)	(8,742)	14,360
Change in fair value of derivative instruments designated as cash flow hedges during the period, Tax Expense (Benefit)				(333)
Less: reclassification adjustment for gains/losses included in net income, Tax Expense (Benefit)				(137)
Fair value of derivative instruments designated as cash flow hedges, Tax Expense (Benefit)				(470)
Total other comprehensive income/loss, Tax Expense (Benefit)	2,665	(1,936)	(8,742)	13,890
Unrealized holding gains/losses arising during the period, Net-of-Tax Amount	(4,571)	3,593	16,631	(25,200)
Less: reclassification adjustment for gains/losses included in net income, Net-of-Tax Amount	(378)	2	(396)	(1,468)
Net unrealized gains/losses, Net-of-Tax Amount	(4,949)	3,595	16,235	(26,668)
Change in fair value of derivative instruments designated as cash flow hedges during the period, Net-of-Tax Amount				619
Less: reclassification adjustment for gains/losses included in net income, Net-of-Tax Amount				255
Fair value of derivative instruments designated as cash flow hedges, Net-of-Tax Amount				874
Other comprehensive income (loss), net of tax	$ (4,949)	$ 3,595	$ 16,235	$ (25,794)

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Document and Entity Information	9 Months Ended
	Sep. 30, 2014	Oct. 31, 2014
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q3
Trading Symbol	IBKC
Entity Registrant Name	IBERIABANK CORP
Entity Central Index Key	0000933141
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		33,446,577

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Other Real Estate Owned

9 Months Ended

Sep. 30, 2014

Banking and Thrift [Abstract]

Other Real Estate Owned

NOTE 11 – OTHER REAL ESTATE OWNED

Other real estate owned is included in Other assets on the Company’s consolidated balance sheet. Other real estate owned, segregated into non-covered and covered properties, consists of the following 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.

	September 30, 2014						December 31, 2013
(Dollars in thousands)	Non-covered		Covered(1)		Total		Non-covered		Covered		Total
Real estate owned acquired by foreclosure	$	18,627	$	30,991	$	49,618	$	28,072	$	60,474	$	88,546
Real estate acquired for development or resale		12,734		—		12,734		9,206		—		9,206
Other foreclosed property		63		971		1,034		93		1,328		1,421
Total	$	31,424	$	31,962	$	63,386	$	37,371	$	61,802	$	99,173

⁽¹⁾  Included in covered OREO at September 30, 2014 is $20.6 million that will lose loss share coverage within the next 12 months.

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Transfers and Servicing of Financial Assets (Including Mortgage Banking Activity) - Components of Mortgage Banking Activity (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Participating Mortgage Loans [Line Items]
Balance at beginning of period			$ 128,442
Originations and purchases			1,218,684	1,712,557
Balance at end of period	148,530		148,530
Gains on sales			41,412	51,709
Total mortgage income	12,814	15,202	40,903	51,841
Mortgage Loans Held for Sale [Member]
Participating Mortgage Loans [Line Items]
Balance at beginning of period			128,442	267,475
Originations and purchases			1,218,684	1,712,557
Sales, net of gains			(1,193,282)	(1,871,747)
Other			(5,314)
Balance at end of period	148,530	108,285	148,530	108,285
Mortgage Income [Member]
Participating Mortgage Loans [Line Items]
Fair value changes of derivatives and mortgage loans held for sale, net			(1,081)	(270)
Gains on sales			41,412	51,709
Servicing and other income, net			572	402
Total mortgage income			$ 40,903	$ 51,841

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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	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Gain (Loss) Recognized in OCI net of taxes (Effective Portion)
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)
Amount of Gain (Loss) Recognized in Income on Derivatives			(1)	209
Not Designated as Hedging Instruments [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	(2,469)	(2,545)	(3,140)	(381)
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	406	2,061	1,971	2,542
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	(3,648)	3,290	(7,512)	897
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	773	(7,896)	2,401	(3,820)
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)
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)

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Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Interest and Dividend Income
Loans, including fees	$ 144,846	$ 120,035	$ 389,124	$ 358,344
Mortgage loans held for sale, including fees	1,594	1,289	3,953	3,965
Investment securities:
Taxable interest	9,551	7,837	28,411	22,241
Tax-exempt interest	1,443	1,649	4,500	5,082
Amortization of FDIC loss share receivable	(25,120)	(22,875)	(61,393)	(68,707)
Other	853	577	2,024	2,180
Total interest and dividend income	133,167	108,512	366,619	323,105
Interest Expense
NOW and MMDA	5,046	4,441	13,353	14,462
Savings	88	71	235	238
Time deposits	4,067	4,012	10,093	13,038
Short-term borrowings	406	104	1,022	365
Long-term debt	2,519	2,432	7,489	8,196
Total interest expense	12,126	11,060	32,192	36,299
Net interest income	121,041	97,452	334,427	286,806
Provision for loan losses	5,714	2,014	12,565	445
Net interest income after provision for loan losses	115,327	95,438	321,862	286,361
Non-interest Income
Service charges on deposit accounts	10,205	7,512	25,421	21,415
Mortgage income	12,814	15,202	40,903	51,841
Title revenue	5,577	5,482	15,007	16,199
ATM/debit card fee income	3,287	2,476	8,691	7,017
Income from bank owned life insurance	1,047	908	4,423	2,747
Gain (loss) on sale of available for sale investments	582	(3)	609	2,259
Derivative losses reclassified from other comprehensive income				(392)
Broker commissions	5,297	3,950	14,823	11,347
Other income	6,854	7,736	19,430	17,809
Total non-interest income	45,663	43,263	129,307	130,242
Non-interest Expense
Salaries and employee benefits	64,934	59,234	193,641	185,578
Net occupancy and equipment	14,883	14,572	44,977	44,050
Impairment of FDIC loss share receivables and other long-lived assets	4,741	1,319	5,378	37,750
Communication and delivery	2,525	2,899	8,756	9,286
Marketing and business development	2,624	2,350	8,886	8,486
Data processing	5,693	4,837	21,196	13,093
Amortization of acquisition intangibles	1,493	1,179	3,954	3,543
Professional services	4,267	4,156	13,575	13,675
Costs of OREO property, net	(587)	(359)	1,070	980
Credit and other loan related expense	4,569	5,248	11,208	13,093
Insurance	3,846	3,125	10,518	8,408
Travel and entertainment	2,290	1,912	6,745	6,199
Other expenses	8,782	7,680	24,959	26,269
Total non-interest expense	120,060	108,152	354,863	370,410
Income before income tax expense	40,930	30,549	96,306	46,193
Income tax expense	11,186	7,357	25,619	6,694
Net Income	29,744	23,192	70,687	39,499
Income Available to Common Shareholders-Basic	29,744	23,192	70,687	39,499
Earnings Allocated to Unvested Restricted Stock	(448)	(425)	(1,159)	(744)
Earnings Available to Common Shareholders-Diluted	29,296	22,767	69,528	38,755
Earnings per common share-Basic	$ 0.89	$ 0.78	$ 2.26	$ 1.34
Earnings per common share-Diluted	$ 0.89	$ 0.78	$ 2.25	$ 1.33
Cash dividends declared per common share	$ 0.34	$ 0.34	$ 1.02	$ 1.02
Unrealized gains on securities:
Unrealized holding gains (losses) arising during the period	(7,032)	5,528	25,586	(38,769)
Less: reclassification adjustment for (gains) losses included in net income	(582)	3	(609)	(2,259)
Net unrealized losses/gains, Before-Tax Amount	(7,614)	5,531	24,977	(41,028)
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				952
Less: reclassification adjustment for losses (gains) included in net income				392
Fair value of derivative instruments designated as cash flow hedges, before tax				1,344
Other comprehensive income (loss), before tax	(7,614)	5,531	24,977	(39,684)
Income tax expense (benefit) related to items of other comprehensive (loss) income	(2,665)	1,936	8,742	(13,890)
Other comprehensive income (loss), net of tax	(4,949)	3,595	16,235	(25,794)
Comprehensive income (loss)	$ 24,795	$ 26,787	$ 86,922	$ 13,705

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Investment Securities

9 Months Ended

Sep. 30, 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:

	September 30, 2014
			Gross		Gross			Estimated
	Amortized		Unrealized		Unrealized			Fair
(Dollars in thousands)	Cost		Gains		Losses			Value
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	359,404	$	1,465	$	(5,926	)	$	354,943
Obligations of state and political obligations		87,895		3,891		—			91,786
Mortgage-backed securities		1,656,341		11,613		(12,338	)		1,655,616
Other securities		1,460		23		—			1,483
Total securities available for sale	$	2,105,100	$	16,992	$	(18,264	)	$	2,103,828
Securities held to maturity:
U.S. Government-sponsored enterprise obligations	$	10,000	$	157	$	—		$	10,157
Obligations of state and political obligations		79,309		3,044		(266	)		82,087
Mortgage-backed securities		31,211		197		(1,194	)		30,214
Total securities held to maturity	$	120,520	$	3,398	$	(1,460	)	$	122,458
	December 31, 2013
			Gross		Gross			Estimated
	Amortized		Unrealized		Unrealized			Fair
(Dollars in thousands)	Cost		Gains		Losses			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

Securities with carrying values of $1.4 billion and $1.5 billion were pledged to secure public deposits and other borrowings at September 30, 2014 and December 31, 2013, respectively.

Management evaluates securities for other-than-temporary impairment at least quarterly, and more frequently when economic or market concerns warrant such evaluation. Consideration is given to 1) the length of time and extent to which the estimated fair value has been less than amortized cost, 2) the financial condition and near-term prospects of the issuer, and 3) the intent of the Company to retain the investment for a period of time sufficient to allow for any anticipated recovery in estimated fair value above amortized cost. In analyzing an issuer’s financial condition, management considers whether the securities are issued by the federal government or its agencies and whether downgrades by bond rating agencies have occurred, as well as review of issuer financial statements and industry analysts’ reports.

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:

	September 30, 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	$	—		$	—	$	(5,926	)	$	258,521	$	(5,926	)	$	258,521
Obligations of state and political obligations		—			186		—			—		—			186
Mortgage-backed securities		(2,846	)		552,357		(9,492	)		333,795		(12,338	)		886,152
Total securities available for sale	$	(2,846	)	$	552,543	$	(15,418	)	$	592,316	$	(18,264	)	$	1,144,859
Securities held to maturity:
Obligations of state and political obligations	$	(1	)	$	564	$	(265	)	$	10,811	$	(266	)	$	11,375
Mortgage-backed securities		—			72		(1,194	)		24,303		(1,194	)		24,375
Total securities held to maturity	$	(1	)	$	636	$	(1,459	)	$	35,114	$	(1,460	)	$	35,750
	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 September 30, 2014 and December, 31, 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 September 30, 2014, 162 debt securities had unrealized losses of 1.64% of the securities’ amortized cost basis and 0.89% of the Company’s total amortized cost basis. At December 31, 2013, 207 debt securities had unrealized losses of 3.23% of the securities’ amortized cost basis and 2.07% of the Company’s total 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 September 30, 2014 and December 31, 2013 is presented in the following table.

(Dollars in thousands)	September 30, 2014		December 31, 2013
Number of securities
Issued by Fannie Mae, Freddie Mac, or Ginnie Mae		78		20
Issued by political subdivisions		6		5
		84		25
Amortized Cost Basis
Issued by Fannie Mae, Freddie Mac, or Ginnie Mae	$	633,230	$	104,520
Issued by political subdivisions		11,076		7,956
	$	644,306	$	112,476
Unrealized Loss
Issued by Fannie Mae, Freddie Mac, or Ginnie Mae	$	16,611	$	5,519
Issued by political subdivisions		265		669
	$	16,876	$	6,188

The Fannie Mae, Freddie Mac, and Ginnie Mae securities are rated AA+ by S&P and Aaa by Moodys. Six 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 2013, 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. Changes to the unobservable inputs used by the Company would have resulted in a higher or lower impairment charge, but the unobservable inputs were not highly sensitive and would not result in a material difference in the impairment charge recorded. 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 unaudited consolidated statements of comprehensive income for the three and nine months ended September 30, 2014.

During the nine months ended September 30, 2014 and 2013, there was no activity related to credit losses on the other-than temporarily impaired investment security where a portion of the unrealized loss was recognized in other comprehensive income.

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 September 30, 2014 or December 31, 2013.

The amortized cost and estimated fair value of investment securities by maturity at September 30, 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
	Weighted					Estimated		Weighted					Estimated
	Average			Amortized		Fair		Average			Amortized		Fair
(Dollars in thousands)	Yield			Cost		Value		Yield			Cost		Value
Within one year or less		1.27	%	$	15,397	$	15,488		2.65	%	$	10,000	$	10,157
One through five years		1.54			241,992		241,502		2.84			12,968		13,352
After five through ten years		2.10			474,758		476,954		2.97			17,983		18,591
Over ten years		2.18			1,372,953		1,369,884		3.05			79,569		80,358
Total		2.08	%	$	2,105,100	$	2,103,828		2.98	%	$	120,520	$	122,458

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.

	Three Months Ended					Nine Months Ended
	September 30					September 30
(Dollars in thousands)	2014		2013			2014		2013
Realized gains	$	582	$	—		$	609	$	2,369
Realized losses		—		(3	)		—		(110	)
Net realized gains (losses)	$	582	$	(3	)	$	609	$	2,259

In addition to the gains above, the Company realized certain immaterial gains on calls of held to maturity securities.

Other Equity Securities

At September 30, 2014 and December 31, 2013, the Company included the following securities in “Other assets” on the consolidated balance sheets:

	September 30		December 31
(Dollars in thousands)	2014		2013
Federal Home Loan Bank (FHLB) stock	$	41,011	$	24,369
Federal Reserve Bank (FRB) stock		34,348		28,098
Other investments		1,306		1,306
Total	$	76,665	$	53,773

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Acquisition Activity

9 Months Ended

Sep. 30, 2014

Business Combinations [Abstract]

Acquisition Activity

NOTE 4 –ACQUISITION ACTIVITY

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 (hereby referred to as “Trust One-Memphis”). Under terms of the agreement, Synovus Bank paid IBERIABANK $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 Metropolitan Statistical Area (“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 Holding Company (“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 option to purchase Teche 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 $84.8 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				71,954
Goodwill			$	84,786

Acquisition of First Private Holdings, Inc.

On June 30, 2014, the Company acquired First Private Holdings, Inc. (“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 $30.6 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 liabilities assumed including identifiable intangible assets				28,029
Goodwill			$	30,611

The Company accounted for the aforementioned business combinations as purchase business combinations. 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 of the current and deferred tax balances acquired, as well as the fair values of loans acquired, core deposit intangible asset, and the deferred tax assets or liabilities created from the acquisition. 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			Preliminary
			Fair Value			As recorded by
(Dollars in thousands)	As Acquired		Adjustments			IBERIABANK
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			Preliminary
			Fair Value			As recorded by
(Dollars in thousands)	As Acquired		Adjustments			IBERIABANK
Assets
Cash and cash equivalents	$	71,611	$	—		$	71,611
Investment securities		24,077		1,092	(1)		25,169
Loans		716,196		(16,636	)(2)		699,560
Other real estate owned		329		(153	)(3)		176
Core deposit intangible		—		2,055	(4)		2,055
Deferred tax asset		1,057		7,337	(5)		8,394
Other assets		56,752		(6,261	)(6)		50,491
Total Assets	$	870,022	$	(12,566	)	$	857,456
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		5,366		—			5,366
Total Liabilities	$	778,296	$	7,206		$	785,502

Explanation of certain fair value adjustments

⁽¹⁾  The amount represents the adjustment to 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 write down 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.

⁽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 is necessary because the interest rate of Teche’s borrowings exceeded current interest rates on similar borrowings.

First Private			Preliminary
			Fair Value			As recorded by
(Dollars in thousands)	As Acquired		Adjustments			IBERIABANK
Assets
Cash and cash equivalents	$	26,621	$	—		$	26,621
Investment securities		18,920		297	(1)		19,217
Loans		295,736		(910	)(2)		294,826
Other real estate owned		—		—			—
Core deposit intangible		—		506	(3)		506
Deferred tax asset (liability)		530		122	(4)		652
Other assets		5,230		—			5,230
Total Assets	$	347,037	$	15		$	347,052
Liabilities
Interest-bearing deposits	$	261,713	$	220	(5)	$	261,933
Non-interest-bearing deposits		50,333		—			50,333
Borrowings		6,451		—			6,451
Other liabilities		306		—			306
Total Liabilities	$	318,803	$	220		$	319,023

Explanation of certain fair value adjustments

⁽¹⁾  The amount represents the adjustment to 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 liability 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 85 months.

Acquisitions of LTC

On February 24, 2014, the Company’s subsidiary, LTC, acquired the assets of 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 the assets of 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. 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 purchase 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 was greater than the net fair value of the acquired 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:

			Louisiana Abstract and Title
(Dollars in thousands)	The Title Company LLC		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 unaudited pro forma information

The following unaudited pro forma information for the nine months ended September 30, 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
Interest and non-interest income	$	500,638
Net income		46,139
Earnings per share—basic		1.40
Earnings per share—diluted		1.40

The Company’s consolidated financial statements as of and for the nine months ended September 30, 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 nine-month period 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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Commitments and Contingencies

9 Months Ended

Sep. 30, 2014

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

NOTE 16 – 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 to extend credit and standby letters of credit. 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 other parties represents the contractual amount of the financial instruments. At September 30, 2014, and December 31, 2013, the fair value of guarantees under commercial and standby letters of credit was $1.3 million and $1.1 million, respectively. This amount represents the unamortized fee associated with these guarantees and is included in 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 September 30, 2014 and December 31, 2013, the Company had the following financial instruments outstanding, whose contract amounts represent credit risk:

(Dollars in thousands)	September 30 2014		December 31 2013
Commitments to grant loans	$	242,137	$	221,627
Unfunded commitments under lines of credit		3,834,107		3,326,448
Commercial and standby letters of credit		131,347		105,026
Reserve for unfunded lending commitments		12,099		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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Derivative Instruments and Other Hedging Activities

9 Months Ended

Sep. 30, 2014

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments and Other Hedging Activities

NOTE 12 – DERIVATIVE INSTRUMENTS AND OTHER HEDGING ACTIVITIES

Information pertaining to outstanding derivative instruments is as follows:

(Dollars in thousands)	Balance Sheet		Asset Derivatives Fair Value				Balance Sheet		Liability Derivatives Fair Value
	Location		September 30, 2014		December 31, 2013		Location		September 30, 2014		December 31, 2013
Derivatives not designated as hedging instruments under ASC Topic 815:
Interest rate contracts		Other assets	$	11,839	$	10,621		Other liabilities	$	11,839	$	10,620
Forward sales contracts		Other assets		104		1,468		Other liabilities		2,215		287
Written and purchased options		Other assets		20,347		17,987		Other liabilities		15,786		15,828
Total derivatives not designated as hedging instruments under ASC Topic 815				32,290		30,076				29,840		26,735
Total			$	32,290	$	30,076			$	29,840	$	26,735
(Dollars in thousands)			Asset Derivatives Notional Amount						Liability Derivatives Notional Amount
			September 30, 2014		December 31, 2013				September 30, 2014		December 31, 2013
Derivatives not designated as hedging instruments under ASC Topic 815:
Interest rate contracts			$	421,523	$	380,303			$	421,523	$	380,303
Forward sales contracts				88,190		192,876				351,861		45,091
Written and purchased options				363,239		295,425				197,044		199,061
Total derivatives not designated as hedging instruments under ASC Topic 815				872,952		868,604				970,428		624,455
Total			$	872,952	$	868,604			$	970,428	$	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 September 30, 2014 and December 31, 2013, the Company was required to post $8.4 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 September 30, 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.

	September 30, 2014
(Dollars in thousands)	Gross Amounts		Gross Amounts Not Offset
	Presented in the		in the Balance Sheet
	Balance Sheet		Derivatives		Collateral (1)			Net
Derivatives subject to master netting arrangements
Derivative assets
Interest rate contracts designated as hedging instruments	$	—	$	—	$	—		$	—
Interest rate contracts not designated as hedging instruments		11,839		—		—			11,839
Written and purchased options		15,423		—		—			15,423
Total derivative assets subject to master netting arrangements	$	27,262	$	—	$	—		$	27,262
Derivative liabilities
Interest rate contracts designated as hedging instruments	$	—	$	—	$	—		$	—
Interest rate contracts not designated as hedging instruments		11,839		—		(3,892	)		7,947
Total derivative liabilities subject to master netting arrangements	$	11,839	$	—	$	(3,892	)	$	7,947

⁽¹⁾ Consists of cash collateral recorded at cost, which approximates fair value, and investment securities.

	December 31, 2013
(Dollars in thousands)	Gross Amounts		Gross Amounts Not Offset
	Presented in the		in the Balance Sheet
	Balance Sheet		Derivatives		Collateral (1)			Net
Derivatives subject to master netting arrangements
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 nine months ended September 30, 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 September 30, 2014, the fair value of derivatives that will mature within the next twelve months is $0.1 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 September 30, 2014 and 2013, and for the three and nine months 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 September 30					For the Three Months Ended September 30
Derivatives in ASC Topic 815 Cash
Flow Hedging Relationships	2014		2013			2014		2013			2014		2013
Interest rate contracts	$	—	$	—	Other income (expense)	$	—	$	—	Other income (expense)	$	—	$	—
Total	$	—	$	—		$	—	$	—		$	—	$	—

											Location of Gain (Loss)			Amount of Gain
											Recognized in Income on			(Loss) Recognized in
			Location of Gain			Amount of Gain					Derivative (Ineffective			Income on
Amount of Gain (Loss)			(Loss) Reclassified			(Loss) Reclassified					Portion and Amount			Derivative (Ineffective
Recognized in OCI net of taxes (Effective			from Accumulated OCI into Income			from Accumulated OCI into Income					Excluded from Effectiveness			Portion and Amount Excluded from
Portion)			(Effective Portion)			(Effective Portion)					Testing			Effectiveness Testing)
As of September 30						For the Nine Months Ended September 30
2014	2013					2014		2013						2014			2013
$                —	$	—		Other income (expense	)	$	—	$	(392	)		Other income (expense	)	$	(1	)	$	—
$                —	$	—				$	—	$	(392	)				$	(1	)	$	—

(Dollars in thousands)	Amount of Gain (Loss) Recognized in Income on Derivatives
Derivatives Not Designated as	Location of Gain (Loss)
Hedging Instruments under ASC	Recognized in Income on	For the Three Months Ended						For the Nine Months Ended
Topic 815	Derivatives	September 30						September 30
		2014			2013			2014			2013
Interest rate contracts	Other income (expense)	$	406		$	2,061			1,971			2,542
Forward sales contracts	Mortgage Income		(3,648	)		3,290			(7,512	)		897
Written and purchased options	Mortgage Income		773			(7,896	)		2,401			(3,820	)
Total		$	(2,469	)	$	(2,545	)	$	(3,140	)	$	(381	)

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Goodwill and Other Acquired Intangible Assets - Schedule of Definite-Lived Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 52,280	$ 46,754
Accumulated Amortization	(35,423)	(31,415)
Net Carrying Amount	16,857	15,339
Core Deposit Intangibles [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	50,564	45,406
Accumulated Amortization	(34,564)	(30,784)
Net Carrying Amount	16,000	14,622
Customer Relationship Intangible Asset [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,348	1,348
Accumulated Amortization	(777)	(631)
Net Carrying Amount	571	717
Noncompete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	163
Accumulated Amortization	(53)
Net Carrying Amount	110
Other Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	205
Accumulated Amortization	(29)
Net Carrying Amount	$ 176

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Loss Sharing Agreements and FDIC Loss Share Receivable

9 Months Ended

Sep. 30, 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 deposit 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 end during the fourth quarter of 2014 for all covered assets excluding single family residential assets and 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. 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 September 30, 2014, projected net losses indicate that a clawback payment is no longer probable. Accordingly, the reserve balance was reversed in the third quarter of 2014 through a reduction of expense in the Company’s statement of comprehensive income for the three and nine months ended September 30, 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:

	Nine Months Ended
	September 30
(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		1,153			(58,565	)
Amortization		(61,393	)		(68,707	)
Submission of reimbursable losses to (recoveries payable to) the FDIC		4,901			(44,910	)
Impairment		(5,097	)		(31,813	)
Changes due to a change in cash flow assumptions on OREO and other changes		(7,164	)		(14,189	)
Balance at end of period	$	94,712		$	204,885

FDIC loss share receivables collectability assessment

The Company assesses the FDIC loss share receivables for collectability on a quarterly basis. Based on the collectability analysis completed for the nine months ended September 30, 2014, the Company concluded that the $94.7 million FDIC loss share receivable is fully collectible as of September 30, 2014. See below for discussion of the impairment charges recognized in 2014 and 2013.

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 collectability assessment completed for the three-months ended September 30, 2014, June 30, 2014 and March 31, 2013, 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.

On April 10, 2013, management concluded and the Board of Directors agreed that an impairment charge was required under generally accepted accounting principles applicable to the Company and should be recognized in the Company’s consolidated financial statements during the three-month period ended March 31, 2013. Therefore, the Company recognized a valuation allowance against the indemnification assets in the amount of $31.8 million through a charge to net income.

Management deemed an impairment charge necessary for the nine-month period ended September 30, 2014 for $5.1 million.

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Investment Securities - Additional Information on Securities in a Continuous Loss Position (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014 Securities	Dec. 31, 2013 Securities
Schedule of Available-for-sale Securities [Line Items]
Number of securities, available for sale securities	84	25
Number of securities, amortized costs	$ 644,306	$ 112,476
Number of securities, unrealized loss	16,876	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	78	20
Number of securities, amortized costs	633,230	104,520
Number of securities, unrealized loss	16,611	5,519
Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of securities, available for sale securities	6	5
Number of securities, amortized costs	11,076	7,956
Number of securities, unrealized loss	$ 265	$ 669

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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	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012
Financial Assets
Cash and cash equivalents	$ 668,007	$ 391,396	$ 553,448	$ 970,977
Loans and loans held for sale	11,227,729		9,151,322
FDIC loss share receivable	94,712	162,312
Financial Liabilities
Deposits	12,377,775	10,737,000	10,950,764
Short-term borrowings	812,783	680,344
Long-term debt	355,569	280,699
Carrying Amount [Member]
Financial Assets
Cash and cash equivalents	668,007	391,396
Investment securities	2,224,348	2,090,906
Loans and loans held for sale	11,227,729	9,620,461
FDIC loss share receivable	94,712	162,312
Derivative instruments	32,290	30,076
Accrued interest receivable	37,143	32,143
Financial Liabilities
Deposits	12,377,775	10,737,000
Short-term borrowings	812,783	680,344
Long-term debt	355,569	280,699
Derivative instruments	29,840	26,735
Accrued interest payable	7,972	6,102
Fair Value [Member]
Financial Assets
Cash and cash equivalents	668,007	391,396
Investment securities	2,226,286	2,089,363
Loans and loans held for sale	11,247,080	9,724,432
FDIC loss share receivable	27,922	21,918
Derivative instruments	32,290	30,076
Accrued interest receivable	37,143	32,143
Financial Liabilities
Deposits	11,986,233	10,226,573
Short-term borrowings	812,783	680,344
Long-term debt	324,282	235,503
Derivative instruments	29,840	26,735
Accrued interest payable	$ 7,972	$ 6,102

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Loans Receivable

9 Months Ended

Sep. 30, 2014

Receivables [Abstract]

Loans Receivable

NOTE 6 – LOANS RECEIVABLE

Loans receivable consist of the following, segregated into non-covered and covered loans, for the periods indicated:

	September 30, 2014
(Dollars in thousands)	Non-covered loans		Covered loans		Total
Commercial loans:
Real estate	$	4,032,419	$	247,156	$	4,279,575
Business		3,193,098		34,234		3,227,332
		7,225,517		281,390		7,506,907
Residential mortgage loans:
Residential 1-4 family		911,099		130,976		1,042,075
Construction / Owner Occupied		27,888		—		27,888
		938,987		130,976		1,069,963
Consumer and other loans:
Home equity		1,458,067		107,811		1,565,878
Indirect automobile		394,691		—		394,691
Other		537,748		4,012		541,760
		2,390,506		111,823		2,502,329
Total	$	10,555,010	$	524,189	$	11,079,199
	December 31, 2013
(Dollars in thousands)	Non-covered loans		Covered loans		Total
Commercial loans:
Real estate	$	3,479,973	$	387,332	$	3,867,305
Business		2,959,088		37,025		2,996,113
		6,439,061		424,357		6,863,418
Residential mortgage loans:
Residential 1-4 family		423,057		154,025		577,082
Construction / Owner Occupied		9,450		—		9,450
		432,507		154,025		586,532
Consumer and other loans:
Home equity		1,154,670		137,122		1,291,792
Indirect automobile		375,236		—		375,236
Other		370,752		4,289		375,041
		1,900,658		141,411		2,042,069
Total	$	8,772,226	$	719,793	$	9,492,019

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 deposit 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 of the CSB, Orion, Century, and Sterling loans and foreclosed real estate are significantly different from those assets not covered under the loss share agreements. Accordingly, the Company presents loans subject to the loss share agreements as “covered loans” and loans that are not subject to the loss share agreements as “non-covered loans.”

Deferred loan origination fees were $19.4 million and $18.6 million and deferred loan expenses were $9.0 million and $7.6 million at September 30, 2014 and December 31, 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 September 30, 2014 and December 31, 2013, overdrafts of $3.7 million and $3.1 million, respectively, have been reclassified to loans receivable.

Loans with carrying values of $2.7 billion and $2.3 billion were pledged to secure public deposits and other borrowings at September 30, 2014 and December 31, 2013, respectively.

Non-covered Loans

The following tables provide an analysis of the aging of non-covered loans as of September 30, 2014 and December 31, 2013. Because of the difference in accounting for acquired loans, the tables below further segregate the Company’s non-covered loans receivable between acquired loans and loans originated by the Company. For purposes of the following tables, subprime mortgage loans are defined as the Company’s mortgage loans that have FICO scores that are less than 620 at the time of origination or were purchased outside of a business combination.

	September 30, 2014
	Non-covered loans excluding acquired loans
											Total Non-covered		Recorded
	Past Due (1)										Loans, Net of		Investment > 90 days
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total		Current		Unearned Income		and Accruing
Commercial real estate construction	$	84	$	—	$	1,317	$	1,401	$	634,593	$	635,994	$	—
Commercial real estate—other		1,347		640		6,789		8,776		2,882,842		2,891,618		—
Commercial business		1,475		44		2,737		4,256		3,089,617		3,093,873		—
Residential prime		1,859		1,349		10,973		14,181		362,513		376,694		—
Residential subprime		—		2		6,197		6,199		114,182		120,381		—
Home equity		1,783		201		7,310		9,294		1,220,704		1,229,998		4
Indirect automobile		1,825		502		1,338		3,665		390,413		394,078		—
Credit card		149		123		987		1,259		67,472		68,731		—
Other		720		337		416		1,473		367,102		368,575		—
Total	$	9,242	$	3,198	$	38,064	$	50,504	$	9,129,438	$	9,179,942	$	4
	December 31, 2013
	Non-covered loans excluding acquired loans
											Total Non-covered		Recorded
	Past Due (1)										Loans, Net of		Investment > 90 days
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total		Current		Unearned Income		and Accruing
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 prime		1,104		852		9,684		11,640		286,167		297,807		1,073
Residential subprime		—		—		1,626		1,626		114,939		116,565		—
Home equity		1,956		569		6,808		9,333		1,091,894		1,101,227		—
Indirect automobile		1,427		293		1,275		2,995		370,388		373,383		—
Credit card		266		92		411		769		62,873		63,642		—
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 include loans on nonaccrual status as of the period indicated. Nonaccrual loans are presented separately in the “Nonaccrual Loans” section below.

	September 30, 2014
	Non-covered acquired loans
														Total Non-covered		Recorded
	Past Due (1)													Loans, Net of		Investment > 90 days
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total		Current		Discount/ Premium			Unearned Income		and Accruing
Commercial real estate construction	$	340	$	45	$	2,118	$	2,503	$	36,832	$	(2,061	)	$	37,274	$	1,821
Commercial real estate—other		1,464		277		22,081		23,822		486,238		(42,527	)		467,533		20,614
Commercial business		717		25		1,905		2,647		101,722		(5,144	)		99,225		1,892
Residential prime		76		931		7,437		8,444		432,837		631			441,912		369
Home equity		1,615		1,003		8,203		10,821		228,051		(10,803	)		228,069		4,102
Indirect automobile		7		1		43		51		606		(44	)		613		43
Other		337		7		2,051		2,395		109,599		(11,552	)		100,442		389
Total	$	4,556	$	2,289	$	43,838	$	50,683	$	1,395,885	$	(71,500	)	$	1,375,068	$	29,230
	December 31, 2013
	Non-covered acquired loans
														Total Non-covered		Recorded
	Past Due (1)													Loans, Net of		Investment > 90 days
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total		Current		Discount/ Premium			Unearned Income		and Accruing
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 prime		—		—		226		226		18,796		(887	)		18,135		226
Home equity		313		516		4,242		5,071		53,995		(5,623	)		53,443		4,242
Indirect automobile		33		—		95		128		1,725		—			1,853		95
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 non-covered loans, excluding acquired loans, on non-accrual status at September 30, 2014 and December 31, 2013.

	September 30		December 31
(Dollars in thousands)	2014		2013
Commercial real estate construction	$	1,317	$	1,803
Commercial real estate—other		6,789		7,648
Commercial business		2,737		15,020
Residential prime		10,973		8,611
Residential subprime		6,197		1,626
Home equity		7,306		6,808
Indirect automobile		1,338		1,275
Credit card		987		411
Other		416		485
Total	$	38,060	$	43,687

Covered Loans

The carrying amount of the acquired covered loans at September 30, 2014 and December 31, 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.

	September 30, 2014
	Acquired		Acquired		Total
	Impaired		Performing		Covered
(Dollars in thousands)	Loans		Loans		Loans
Commercial loans:
Real estate	$	4,678	$	242,478	$	247,156
Business		620		33,614		34,234
		5,298		276,092		281,390
Residential mortgage loans:
Residential 1-4 family		24,304		106,672		130,976
Construction / Owner Occupied		—		—		—
		24,304		106,672		130,976
Consumer and other loans:
Home equity		16,210		91,601		107,811
Indirect automobile		—		—		—
Other		489		3,523		4,012
		16,699		95,124		111,823
Total	$	46,301	$	477,888	$	524,189
	December 31, 2013
	Acquired		Acquired		Total
	Impaired		Performing		Covered
(Dollars in thousands)	Loans		Loans		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

The Company acquired loans (both covered and non-covered) through previous acquisitions, which are subject to ASC Topic 310-30.

As discussed in Note 4, during 2014, the Company acquired loans of $86.5 million from Trust One-Memphis, $699.6 million from Teche, and $294.8 million from First Private in the current period. Acquired loans totaling $1.1 billion are accounted for under ASC Topic 310-10, while the carrying amounts of the loans acquired in the current period subject to ASC Topic 310-30 are detailed in the following table as of the purchase date. The allocation of loans acquired from both Teche and First Private between loans subject to ASC Topic 310-30 and those subject to ASC Topic 310-10 is preliminary and subject to change up to one year after the acquisition date as information on these loans becomes available.

	Acquired			Acquired			Total
	Impaired			Performing			Acquired
(Dollars in thousands)	Loans			Loans			Loans
Contractually required principal and interest at acquisition	$	82,967		$	15,130		$	98,097
Nonaccretable difference (expected losses and foregone interest)		(4,197	)		(361	)		(4,558	)
Cash flows expected to be collected at acquisition		78,770			14,769			93,539
Accretable yield		(8,242	)		(1,536	)		(9,778	)
Basis in acquired loans at acquisition	$	70,528		$	13,233		$	83,761

The following is a summary of changes in the accretable difference of acquired loans during the nine months ended September 30, 2014 and 2013.

	September 30, 2014
	Acquired			Acquired			Total
	Impaired			Performing			Acquired
(Dollars in thousands)	Loans			Loans			Loans
Balance at beginning of period	$	78,349		$	276,543		$	354,892
Acquisition		8,242			1,536			9,778
Transfers from nonaccretable difference to accretable yield		3,952			13,872			17,824
Accretion		(12,766	)		(66,590	)		(79,356	)
Changes in expected cash flows not affecting nonaccretable differences (1)		(6,873	)		(19,377	)		(26,250	)
Balance at end of period	$	70,904		$	205,984		$	276,888
	September 30, 2013
	Acquired			Acquired			Total
	Impaired			Performing			Acquired
	Loans			Loans			Loans
Balance at beginning of period	$	76,623		$	279,770		$	356,393
Transfers from nonaccretable difference to accretable yield		6,148			34,480			40,628
Accretion		(13,519	)		(119,193	)		(132,712	)
Changes in expected cash flows not affecting nonaccretable differences (1)		10,561			81,173			91,734
Balance at end of period	$	79,813		$	276,230		$	356,043

⁽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 troubled debt restructurings (“TDRs”) at September 30, 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 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 acquired loans that would otherwise meet the criteria for classification as a TDR are excluded from the tables below.

	September 30, 2014								September 30, 2013
	Accruing Loans								Accruing Loans
			Past Due		Nonaccrual						Past Due		Nonaccrual
(Dollars in thousands)	Current		> 30 days		TDRs		Total TDRs		Current		> 30 days		TDRs		Total TDRs
Commercial real estate construction	$	—	$	—	$	—	$	—	$	—		—		—		—
Commercial real estate—other		367		—		58		425		411		—		5,601		6,012
Commercial business		726		—		2,027		2,753		1,056		—		12,610		13,666
Residential prime		—		—		—		—		—		—		—		—
Residential subprime		—		—		—		—		—		—		—		—
Home equity		—		—		243		243		—		—		263		263
Indirect automobile		—		—		—		—		—		—		—		—
Credit card		—		—		—		—		—		—		—		—
Other		—		—		—		—		—		—		—		—
Total	$	1,093	$	—	$	2,328	$	3,421	$	1,467	$	—	$	18,474	$	19,941

At September 30, 2014, there were no TDRs that occurred during the first nine months through modification of the original loan terms. TDRs totaling $11.2 million occurred during the nine-month period ending September 30, 2013 and were subsequently charged off during the same period. The following table provides information on how the TDRs were modified during the nine months ended September 30:

(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		—		—
Other concession(s) (1)		—		11,210
Total	$	—	$	11,210

⁽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 business, mortgage or consumer TDRs that were added during the nine month periods for September 30, 2014 and 2013. Information about the Company’s TDRs occurring in these periods is presented in the following table.

	September 30, 2014						September 30, 2013
			Pre-modification		Post-modification				Pre-modification		Post-modification
			Outstanding		Outstanding				Outstanding		Outstanding
	Number of		Recorded		Recorded		Number of		Recorded		Recorded
(In thousands, except number of loans)	Loans		Investment		Investment (1)		Loans		Investment		Investment (1)
Commercial real estate		—	$	—	$	—		5	$	12,507	$	12,329
Total		—	$	—	$	—		5	$	12,507	$	12,329

⁽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.

	September 30, 2014				September 30, 2013
	Number of		Recorded		Number of		Recorded
(In thousands, except number of loans)	Loans		Investment		Loans		Investment
Commercial real estate		31	$	58		45	$	6,012
Commercial business		11		1,767		13		12,370
Residential prime		—		—		—		—
Home Equity		—		—		1		47
Indirect automobile		—		—		—		—
Credit card		—		—		—		—
Other		1		—		1		—
Total		43	$	1,825		60	$	18,429

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Allowance for Credit Losses and Credit Quality

9 Months Ended

Sep. 30, 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 nine months ended September 30, 2014 and 2013 is as follows:

	September 30, 2014
	Non-covered loans
	Excluding
(Dollars in thousands)	Acquired 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		9,099			(1,259	)		5,878			13,718
Adjustment attributable to FDIC loss share arrangements		—			—			(1,153	)		(1,153	)
Net (reversal of) provision for loan losses		9,099			(1,259	)		4,725			12,565
Adjustment attributable to FDIC loss share arrangements		—			—			1,153			1,153
Transfer of balance to OREO		—			(207	)		(5,171	)		(5,378	)
Loans charged-off		(8,242	)		(586	)		(12,823	)		(21,651	)
Recoveries		4,338			401			38			4,777
Balance at end of period	$	72,537		$	2,906		$	59,097		$	134,540
Reserve for unfunded lending commitments
Balance, beginning of period	$	11,147		$	—		$	—		$	11,147
Provision for unfunded lending commitments		952			—			—			952
Balance at end of period	$	12,099		$	—		$	—		$	12,099
	September 30, 2013
	Non-covered loans
	Excluding
	Acquired 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		2,884			(2,464	)		(58,540	)		(58,120	)
Adjustment attributable to FDIC loss share arrangements		—			—			58,565			58,565
Net (reversal of) provision for loan losses		2,884			(2,464	)		25			445
Adjustment attributable to FDIC loss share arrangements		—			—			(58,565	)		(58,565	)
Transfer of balance to OREO		—			(1,013	)		(29,302	)		(30,315	)
Transfer of balance to the RULC		(9,828	)		—			—			(9,828	)
Loans charged-off		(7,455	)		(10	)		(1,683	)		(9,148	)
Recoveries		4,353			—			—			4,353
Balance at end of period		64,165			5,329		$	79,051		$	148,545
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		2,131			—			—			2,131
Balance at end of period	$	11,959		$	—		$	—		$	11,959

A summary of changes in the allowance for credit losses for non-covered loans, by loan portfolio type, for the nine months ended September 30, 2014 and 2013 is as follows:

	September 30, 2014
	Commercial			Commercial
(Dollars in thousands)	real estate			business			Mortgage			Consumer			Unallocated		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		611			2,187			514			4,528			—		7,840
Transfer of balance to OREO		—			(130	)		(12	)		(65	)		—		(207	)
Loans charged off		(1,214	)		(1,097	)		(607	)		(5,910	)		—		(8,828	)
Recoveries		2,209			93			134			2,303			—		4,739
Balance at end of period	$	28,196		$	29,568		$	2,575		$	15,104		$	—	$	75,443
Reserve for unfunded commitments
Balance at beginning of period	$	3,089		$	4,839		$	72		$	3,147		$	—	$	11,147
(Reversal of) Provision for unfunded commitments		726			192			11			23			—		952
Balance at end of period	$	3,815		$	5,031		$	83		$	3,170		$	—	$	12,099
Allowance on loans individually evaluated for impairment	$	25		$	—		$	—		$	—		$	—	$	25
Allowance on loans collectively evaluated for impairment		28,171			29,568			2,575			15,104			—		75,418
Loans, net of unearned income:
Balance at end of period	$	4,032,419		$	3,193,098		$	938,987		$	2,390,506		$	—	$	10,555,010
Balance at end of period individually evaluated for impairment		7,357			3,276			—			706			—		11,339
Balance at end of period collectively evaluated for impairment		4,025,062			3,189,822			938,987			2,389,800			—		10,543,671
Balance at end of period acquired with deteriorated credit quality		15,061			2,562			160			1,707			—		19,490
	September 30, 2013
	Commercial			Commercial
(Dollars in thousands)	real estate			business			Mortgage			Consumer			Unallocated		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		(6,926	)		(582	)		1,048			6,880			—		420
Transfer of balance to OREO		(279	)		(81	)		(646	)		(7	)		—		(1,013	)
Transfer of balance to the RULC		(2,939	)		(3,497	)		(40	)		(3,352	)		—		(9,828	)
Loans charged off		(1,966	)		(531	)		(481	)		(4,487	)		—		(7,465	)
Recoveries		1,498			354			698			1,803			—		4,353
Balance at end of period	$	27,652		$	24,384		$	2,704		$	14,754		$	—	$	69,494
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		1,207			610			38			276					2,131
Balance at end of period	$	4,146		$	4,107		$	78		$	3,628		$	—	$	11,959
Allowance on loans individually evaluated for impairment	$	8		$	801		$	283		$	—		$	—	$	1,092
Allowance on loans collectively evaluated for impairment		27,644			23,583			2,421			14,754			—		68,402
Loans, net of unearned income:
Balance at end of period	$	3,320,333		$	2,643,822		$	409,940		$	1,861,940		$	—	$	8,236,035
Balance at end of period individually evaluated for impairment		9,529			14,548			1,407			263			—		25,747
Balance at end of period collectively evaluated for impairment		3,310,804			2,629,274			408,533			1,861,677			—		8,210,288
Balance at end of period acquired with deteriorated credit quality		16,287			45			120			1,815			—		18,267

A summary of changes in the allowance for credit losses for covered loans, by loan portfolio type, for the nine months ended September 30, 2014 and 2013 is as follows:

	September 30, 2014
	Commercial			Commercial
(Dollars in thousands)	real estate			business			Mortgage			Consumer			Unallocated		Total
Allowance for loan losses
Balance at beginning of period	$	38,772		$	5,380		$	10,889		$	16,134		$	—	$	71,175
Provision for loan losses		2,544			376			971			834			—		4,725
(Decrease) Increase in FDIC loss share receivable		734			609			(2,911	)		2,721			—		1,153
Transfer of balance to OREO		(1,874	)		(1,162	)		(648	)		(1,487	)		—		(5,171	)
Loans charged off		(9,578	)		(2,192	)		(90	)		(963	)		—		(12,823	)
Recoveries		38			—			—			—			—		38
Balance at end of period	$	30,636		$	3,011		$	8,211		$	17,239		$	—	$	59,097
Allowance on loans individually evaluated for impairment	$	—		$	—		$	—		$	—		$	—	$	—
Allowance on loans collectively evaluated for impairment		30,636			3,011			8,211			17,239			—		59,097
Loans, net of unearned income:
Balance at end of period	$	247,156		$	34,234		$	130,976		$	111,823		$	—	$	524,189
Balance at end of period individually evaluated for impairment		—			—			—			—			—		—
Balance at end of period collectively evaluated for impairment		247,156			34,234			130,976			111,823			—		524,189
Balance at end of period acquired with deteriorated credit quality		4,678			620			24,304			16,699			—		46,301
	September 30, 2013
	Commercial			Commercial
(Dollars in thousands)	real estate			business			Mortgage			Consumer			Unallocated		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		27			—			(1	)		(1	)		—		25
(Decrease) Increase in FDIC loss share receivable		(30,853	)		(3,137	)		(5,734	)		(18,841	)		—		(58,565	)
Transfer of balance to OREO		(22,375	)		(314	)		(6,614	)		1			—		(29,302	)
Loans charged off		(1,683	)		—			—			—			—		(1,683	)
Balance at end of period	$	45,987		$	7,924		$	10,217		$	14,923		$	—	$	79,051
Allowance on loans individually evaluated for impairment	$	—		$	—		$	—		$	—		$	—	$	—
Allowance on loans collectively evaluated for impairment		45,987			7,924			10,217			14,923			—		79,051
Loans, net of unearned income:
Balance at end of period	$	459,506		$	40,422		$	153,515		$	153,559		$	—	$	807,002
Balance at end of period individually evaluated for impairment		—			—			—			—			—		—
Balance at end of period collectively evaluated for impairment		459,506			40,422			153,515			153,559			—		807,002
Balance at end of period acquired with deteriorated credit quality		23,751			—			28,333			26,400			—		78,484

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 receivable between acquired loans and loans that were not acquired. 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 September 30, 2014 and December 31, 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 September 30, 2014 and December 31, 2013.

	Non-covered loans excluding acquired loans
	September 30, 2014										December 31, 2013
			Special										Special
(Dollars in thousands)	Pass		Mention		Substandard		Doubtful		Total		Pass		Mention		Substandard		Doubtful		Total
Commercial real estate construction	$	624,592	$	249	$	11,153	$	—	$	635,994	$	370,824	$	9,309	$	2,962	$	—	$	383,095
Commercial real estate—other		2,817,777		46,718		26,700		423		2,891,618		2,694,161		27,227		30,308		113		2,751,809
Commercial business		3,047,885		23,093		20,921		1,974		3,093,873		2,866,794		6,164		32,167		926		2,906,051
Total	$	6,490,254	$	70,060	$	58,774	$	2,397	$	6,621,485	$	5,931,779	$	42,700	$	65,437	$	1,039	$	6,040,955

	Non-covered loans excluding acquired loans
	September 30, 2014						December 31, 2013
			30+ Days						30+ Days
(Dollars in thousands)	Current		Past Due		Total		Current		Past Due		Total
Residential prime	$	362,513	$	14,181	$	376,694	$	286,167	$	11,640	$	297,807
Residential subprime		114,182		6,199		120,381		114,939		1,626		116,565
Home equity		1,220,704		9,294		1,229,998		1,091,894		9,333		1,101,227
Indirect automobile		390,413		3,665		394,078		370,388		2,995		373,383
Credit card		67,472		1,259		68,731		62,873		769		63,642
Consumer—other		367,102		1,473		368,575		293,693		1,049		294,742
Total	$	2,522,386	$	36,071	$	2,558,457	$	2,219,954	$	27,412	$	2,247,366

	Non-covered acquired loans
	September 30, 2014													December 31, 2013
			Special													Special
(Dollars in thousands)	Pass		Mention		Substandard		Doubtful		Discount			Total		Pass		Mention		Substandard		Doubtful		Discount			Total
Commercial real estate construction	$	30,675	$	3,671	$	4,989	$	—	$	(2,061	)	$	37,274	$	17,132	$	196	$	5,435	$	—	$	(2,532	)	$	20,231
Commercial real estate—other		456,790		11,065		42,027		178		(42,527	)		467,533		310,303		15,351		51,267		93		(52,176	)		324,838
Commercial business		97,383		2,203		4,571		212		(5,144	)		99,225		51,414		1,920		2,586		31		(2,914	)		53,037
Total	$	584,848	$	16,939	$	51,587	$	390	$	(49,732	)	$	604,032	$	378,849	$	17,467	$	59,288	$	124	$	(57,622	)	$	398,106

	Non-covered acquired loans
	September 30, 2014									December 31, 2013
			30+ Days		Premium							30+ Days		Premium
(Dollars in thousands)	Current		Past Due		(discount)			Total		Current		Past Due		(discount)			Total
Residential prime	$	432,837	$	8,444	$	631		$	441,912	$	18,796	$	226	$	(887	)	$	18,135
Home equity		228,051		10,821		(10,803	)		228,069		53,995		5,071		(5,623	)		53,443
Indirect automobile		606		51		(44	)		613		1,725		128		—			1,853
Consumer—other		109,599		2,395		(11,552	)		100,442		12,598		1,251		(1,481	)		12,368
Total	$	771,093	$	21,711	$	(21,768	)	$	771,036	$	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 fair value at the date indicated, as adjusted for income accretion and changes in cash flow estimates in subsequent periods.

	Covered loans
	September 30, 2014											December 31, 2013
			Special											Special
(Dollars in thousands)	Pass		Mention		Substandard		Doubtful		Total			Pass		Mention		Substandard		Doubtful		Total
Commercial real estate construction	$	40,754	$	1,822	$	9,285	$	—	$	51,861		$	42,886	$	7,401	$	23,891	$	497	$	74,675
Commercial real estate—other		113,309		22,277		75,353		—		210,939			148,579		49,699		144,680		3,267		346,225
Commercial business		26,087		887		8,814		46		35,834			30,710		780		14,556		984		47,030
	$	180,150	$	24,986	$	93,452	$	46	$	298,634		$	222,175	$	57,880	$	183,127	$	4,748	$	467,930
Discount										(17,244	)										(43,573	)
Total									$	281,390										$	424,357

	Covered loans
	September 30, 2014									December 31, 2013
			30+ Days		Premium							30+ Days		Premium
(Dollars in thousands)	Current		Past Due		(discount)			Total		Current		Past Due		(discount)			Total
Residential prime	$	143,529	$	23,993	$	(36,546	)	$	130,976	$	158,710	$	30,814	$	(35,499	)	$	154,025
Home equity		115,813		19,403		(27,405	)		107,811		143,236		35,811		(41,925	)		137,122
Credit card		588		33		—			621		648		31		—			679
Consumer—other		498		23		2,870			3,391		591		144		2,875			3,610
Total	$	260,428	$	43,452	$	(61,081	)	$	242,799	$	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.

	September 30, 2014							December 31, 2013
			Unpaid							Unpaid
	Recorded		Principal		Related			Recorded		Principal		Related
(Dollars in thousands)	Investment		Balance		Allowance			Investment		Balance		Allowance
With no related allowance recorded:
Commercial real estate	$	6,990	$	6,990	$	—		$	8,567	$	8,567	$	—
Commercial business		3,276		3,276		—			13,256		13,256		—
Home equity		689		689		—			258		258		—
With an allowance recorded:
Commercial real estate		1,450		1,483		(33	)		1,268		1,284		(16	)
Commercial business		186		188		(2	)		1,927		2,770		(843	)
Residential prime		10,746		10,973		(227	)		9,791		10,019		(228	)
Residential subprime		6,169		6,197		(28	)		1,617		1,626		(9	)
Home equity		7,017		7,064		(47	)		6,506		6,550		(44	)
Indirect automobile		1,330		1,338		(8	)		1,267		1,275		(8	)
Credit card		968		987		(19	)		404		411		(7	)
Other		429		433		(4	)		481		485		(4	)
Total	$	39,250	$	39,618	$	(368	)	$	45,342	$	46,501		(1,159	)
Total commercial loans		11,902		11,937		(35	)		25,018		25,877		(859	)
Total mortgage loans		16,915		17,170		(255	)		11,408		11,645		(237	)
Total consumer loans		10,433		10,511		(78	)		8,916		8,979		(63	)

	For the Three Months Ended September 30								For the Nine Months Ended September 30
	2014				2013				2014				2013
	Average		Interest		Average		Interest		Average		Interest		Average		Interest
	Recorded		Income		Recorded		Income		Recorded		Income		Recorded		Income
(Dollars in thousands)	Investment		Recognized		Investment		Recognized		Investment		Recognized		Investment		Recognized
With no related allowance recorded:
Commercial real estate	$	7,026	$	6	$	10,703	$	6	$	7,114	$	20	$	12,787	$	22
Commercial business		3,553		11		13,218		17		4,417		48		8,608		59
Home equity		692		—		265		—		700		14		287		—
With an allowance recorded:
Commercial real estate		1,631		—		4,346		—		1,533		91		6,092		5
Commercial business		312		—		2,739		—		584		9		2,746		3
Residential prime		11,077		—		9,650		—		10,226		119		9,380		7
Residential subprime		6,228		—		—		—		6,115		—		—		—
Home equity		7,177		5		7,244		—		7,404		40		7,458		14
Indirect automobile		1,544		—		1,349		—		1,720		27		1,610		22
Credit card		1,051		—		424		—		724		—		426		—
Other		470		—		372		—		489		11		446		4
Total	$	40,761	$	22	$	50,310	$	23	$	41,026	$	379	$	49,840	$	136
Total commercial loans		12,522		17		31,006		23		13,648		168		30,233		89
Total mortgage loans		17,305		—		9,650		—		16,341		119		9,380		7
Total consumer loans		10,934		5		9,654		—		11,037		92		10,227		40

As of September 30, 2014 and December 31, 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.

XML

Transfers and Servicing of Financial Assets (Including Mortgage Banking Activity)

9 Months Ended

Sep. 30, 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)

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 government-sponsored enterprises (“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. The following table details the mortgage banking activity as of and for the nine months ended September 30:

(Dollars in thousands)	2014			2013
Balance at beginning of period	$	128,442		$	267,475
Originations and purchases		1,218,684			1,712,557
Sales, net of gains		(1,193,282	)		(1,871,747	)
Other		(5,314	)		—
Balance at end of period	$	148,530		$	108,285

(Dollars in thousands)	2014			2013
Fair value changes of derivatives and mortgage loans held for sale, net	$	(1,081	)	$	(270	)
Gains on sales		41,412			51,709
Servicing and other income, net		572			402
Total mortgage income	$	40,903		$	51,841

Mortgage Servicing Rights

Mortgage servicing rights 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 the periods indicated:

	September 30, 2014							December 31, 2013
	Gross Carrying		Accumulated			Net Carrying		Gross Carrying		Accumulated			Net Carrying
(Dollars in thousands)	Amount		Amortization			Amount		Amount		Amortization			Amount
Mortgage servicing rights	$	2,787	$	(1,020	)	$	1,767	$	2,146	$	(638	)	$	1,508

XML

Loans Receivable - Schedule of Non-Covered and Covered Loans (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	$ 10,555,010	$ 8,772,226
Covered loans receivable	524,189	719,793
Total loans receivable	11,079,199	9,492,019
Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	524,189	719,793	807,002
Non-Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	10,555,010	8,772,226
Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	281,390	424,357
Total loans receivable	7,506,907	6,863,418
Commercial Loans [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	247,156	387,332
Total loans receivable	4,279,575	3,867,305
Commercial Loans [Member] | Business [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	34,234	37,025
Total loans receivable	3,227,332	2,996,113
Commercial Loans [Member] | Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	281,390	424,357
Commercial Loans [Member] | Covered Loans [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	247,156	387,332
Commercial Loans [Member] | Covered Loans [Member] | Business [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	34,234	37,025
Commercial Loans [Member] | Non-Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	7,225,517	6,439,061
Commercial Loans [Member] | Non-Covered Loans [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	4,032,419	3,479,973
Commercial Loans [Member] | Non-Covered Loans [Member] | Business [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	3,193,098	2,959,088
Residential Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	130,976	154,025
Total loans receivable	1,069,963	586,532
Residential Mortgage Loans [Member] | Residential 1-4 Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	130,976	154,025
Total loans receivable	1,042,075	577,082
Residential Mortgage Loans [Member] | Construction / Owner Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable
Total loans receivable	27,888	9,450
Residential Mortgage Loans [Member] | Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	130,976	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	130,976	154,025
Residential Mortgage Loans [Member] | Non-Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	938,987	432,507
Residential Mortgage Loans [Member] | Non-Covered Loans [Member] | Residential 1-4 Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	911,099	423,057
Residential Mortgage Loans [Member] | Non-Covered Loans [Member] | Construction / Owner Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	27,888	9,450
Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	111,823	141,411
Total loans receivable	2,502,329	2,042,069
Consumer and Other Loans [Member] | Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	107,811	137,122
Total loans receivable	1,565,878	1,291,792
Consumer and Other Loans [Member] | Indirect Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable
Total loans receivable	394,691	375,236
Consumer and Other Loans [Member] | Consumer - Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	4,012	4,289
Total loans receivable	541,760	375,041
Consumer and Other Loans [Member] | Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	111,823	141,411
Consumer and Other Loans [Member] | Covered Loans [Member] | Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	107,811	137,122
Consumer and Other Loans [Member] | Covered Loans [Member] | Consumer - Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans receivable	4,012	4,289
Consumer and Other Loans [Member] | Non-Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	2,390,506	1,900,658
Consumer and Other Loans [Member] | Non-Covered Loans [Member] | Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	1,458,067	1,154,670
Consumer and Other Loans [Member] | Non-Covered Loans [Member] | Indirect Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	394,691	375,236
Consumer and Other Loans [Member] | Non-Covered Loans [Member] | Consumer - Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered loans receivable	$ 537,748	$ 370,752

XML

Other Real Estate Owned - Schedule of Other Real Estate Owned Segregated into Non-Covered and Covered Properties (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Real Estate Properties [Line Items]
Real estate owned acquired by foreclosure	$ 49,618	$ 88,546
Real estate acquired for development or resale	12,734	9,206
Other foreclosed property	1,034	1,421
Total other real estate owned and foreclosed property	63,386	99,173
Non-covered Properties [Member]
Real Estate Properties [Line Items]
Real estate owned acquired by foreclosure	18,627	28,072
Real estate acquired for development or resale	12,734	9,206
Other foreclosed property	63	93
Total other real estate owned and foreclosed property	31,424	37,371
Covered Properties [Member]
Real Estate Properties [Line Items]
Real estate owned acquired by foreclosure	30,991	60,474
Real estate acquired for development or resale
Other foreclosed property	971	1,328
Total other real estate owned and foreclosed property	$ 31,962	$ 61,802

XML

Loans Receivable - Schedule of Aging of Non-Covered Loans (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Non-Covered Acquired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	$ 4,556	$ 3,251
Past Due, 60-89 days	2,289	2,580
Past Due, Greater than 90 days	43,838	37,265
Total Past Due	50,683	43,096
Current	1,395,885	506,422
Discount	(71,500)	(65,613)
Total Non-covered Loans, Net of Unearned Income	1,375,068	483,905
Recorded Investment > 90 days and Accruing	29,230	37,265
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	340	388
Past Due, 60-89 days	45
Past Due, Greater than 90 days	2,118	2,542
Total Past Due	2,503	2,930
Current	36,832	19,833
Discount	(2,061)	(2,532)
Total Non-covered Loans, Net of Unearned Income	37,274	20,231
Recorded Investment > 90 days and Accruing	1,821	2,542
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	1,464	1,798
Past Due, 60-89 days	277	1,963
Past Due, Greater than 90 days	22,081	27,967
Total Past Due	23,822	31,728
Current	486,238	345,286
Discount	(42,527)	(52,176)
Total Non-covered Loans, Net of Unearned Income	467,533	324,838
Recorded Investment > 90 days and Accruing	20,614	27,967
Non-Covered Acquired Loans [Member] | Commercial Business [Member] | Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	717	544
Past Due, 60-89 days	25
Past Due, Greater than 90 days	1,905	1,218
Total Past Due	2,647	1,762
Current	101,722	54,189
Discount	(5,144)	(2,914)
Total Non-covered Loans, Net of Unearned Income	99,225	53,037
Recorded Investment > 90 days and Accruing	1,892	1,218
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	76
Past Due, 60-89 days	931
Past Due, Greater than 90 days	7,437	226
Total Past Due	8,444	226
Current	432,837	18,796
Discount	631	(887)
Total Non-covered Loans, Net of Unearned Income	441,912	18,135
Recorded Investment > 90 days and Accruing	369	226
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	1,615	313
Past Due, 60-89 days	1,003	516
Past Due, Greater than 90 days	8,203	4,242
Total Past Due	10,821	5,071
Current	228,051	53,995
Discount	(10,803)	(5,623)
Total Non-covered Loans, Net of Unearned Income	228,069	53,443
Recorded Investment > 90 days and Accruing	4,102	4,242
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	7	33
Past Due, 60-89 days	1
Past Due, Greater than 90 days	43	95
Total Past Due	51	128
Current	606	1,725
Discount	(44)
Total Non-covered Loans, Net of Unearned Income	613	1,853
Recorded Investment > 90 days and Accruing	43	95
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	337	175
Past Due, 60-89 days	7	101
Past Due, Greater than 90 days	2,051	975
Total Past Due	2,395	1,251
Current	109,599	12,598
Discount	(11,552)	(1,481)
Total Non-covered Loans, Net of Unearned Income	100,442	12,368
Recorded Investment > 90 days and Accruing	389	975
Non-Covered Loans Excluding Acquired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	9,242	13,426
Past Due, 60-89 days	3,198	7,965
Past Due, Greater than 90 days	38,064	44,762
Total Past Due	50,504	66,153
Current	9,129,438	8,222,168
Total Non-covered Loans, Net of Unearned Income	9,179,942	8,288,321
Recorded Investment > 90 days and Accruing	4	1,075
Non-Covered Loans Excluding Acquired Loans [Member] | Commercial Real Estate Construction [Member] | Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	84
Past Due, Greater than 90 days	1,317	1,803
Total Past Due	1,401	1,803
Current	634,593	381,292
Total Non-covered Loans, Net of Unearned Income	635,994	383,095
Non-Covered Loans Excluding Acquired Loans [Member] | Commercial Real Estate - Other [Member] | Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	1,347	6,098
Past Due, 60-89 days	640	5,630
Past Due, Greater than 90 days	6,789	7,650
Total Past Due	8,776	19,378
Current	2,882,842	2,732,431
Total Non-covered Loans, Net of Unearned Income	2,891,618	2,751,809
Recorded Investment > 90 days and Accruing		2
Non-Covered Loans Excluding Acquired Loans [Member] | Commercial Business [Member] | Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	1,475	2,117
Past Due, 60-89 days	44	423
Past Due, Greater than 90 days	2,737	15,020
Total Past Due	4,256	17,560
Current	3,089,617	2,888,491
Total Non-covered Loans, Net of Unearned Income	3,093,873	2,906,051
Non-Covered Loans Excluding Acquired Loans [Member] | Residential Prime [Member] | Residential Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	1,859	1,104
Past Due, 60-89 days	1,349	852
Past Due, Greater than 90 days	10,973	9,684
Total Past Due	14,181	11,640
Current	362,513	286,167
Total Non-covered Loans, Net of Unearned Income	376,694	297,807
Recorded Investment > 90 days and Accruing		1,073
Non-Covered Loans Excluding Acquired Loans [Member] | Home Equity [Member] | Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	1,783	1,956
Past Due, 60-89 days	201	569
Past Due, Greater than 90 days	7,310	6,808
Total Past Due	9,294	9,333
Current	1,220,704	1,091,894
Total Non-covered Loans, Net of Unearned Income	1,229,998	1,101,227
Recorded Investment > 90 days and Accruing	4
Non-Covered Loans Excluding Acquired Loans [Member] | Indirect Automobile [Member] | Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	1,825	1,427
Past Due, 60-89 days	502	293
Past Due, Greater than 90 days	1,338	1,275
Total Past Due	3,665	2,995
Current	390,413	370,388
Total Non-covered Loans, Net of Unearned Income	394,078	373,383
Non-Covered Loans Excluding Acquired Loans [Member] | Consumer - Other [Member] | Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	720	458
Past Due, 60-89 days	337	106
Past Due, Greater than 90 days	416	485
Total Past Due	1,473	1,049
Current	367,102	293,693
Total Non-covered Loans, Net of Unearned Income	368,575	294,742
Non-Covered Loans Excluding Acquired Loans [Member] | Residential Subprime [Member] | Residential Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 60-89 days	2
Past Due, Greater than 90 days	6,197	1,626
Total Past Due	6,199	1,626
Current	114,182	114,939
Total Non-covered Loans, Net of Unearned Income	120,381	116,565
Non-Covered Loans Excluding Acquired Loans [Member] | Credit Card [Member] | Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due, 30-59 days	149	266
Past Due, 60-89 days	123	92
Past Due, Greater than 90 days	987	411
Total Past Due	1,259	769
Current	67,472	62,873
Total Non-covered Loans, Net of Unearned Income	$ 68,731	$ 63,642

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Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 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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Investment Securities - Schedule of Securities in Other Assets on Company's Consolidated Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract]
Federal Home Loan Bank (FHLB) stock	$ 41,011	$ 24,369
Federal Reserve Bank (FRB) stock	34,348	28,098
Other investments	1,306	1,306
Total	$ 76,665	$ 53,773

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Capital Requirements and Other Regulatory Matters - Actual Capital Amounts and Ratios (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Consolidated [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 Leverage, Minimum Amount	$ 596,945	$ 507,760
Tier 1 risk-based capital, Minimum Amount	490,391	426,002
Total risk-based capital, Minimum Amount	980,781	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	1,376,283	1,231,886
Tier 1 risk-based capital, Actual Amount	1,376,283	1,231,886
Total risk-based capital, Actual Amount	1,522,932	1,365,280
Tier 1 Leverage, Actual Ratio	9.22%	9.70%
Tier 1 risk-based capital, Actual Ratio	11.23%	11.57%
Total risk-based capital, Actual Ratio	12.42%	12.82%
IBERIABANK [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 Leverage, Minimum Amount	594,578	505,723
Tier 1 risk-based capital, Minimum Amount	489,049	424,578
Total risk-based capital, Minimum Amount	978,099	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	743,223	632,154
Tier 1 risk-based capital, Well Capitalized Amount	733,574	636,868
Total risk-based capital, Well Capitalized Amount	1,222,624	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	1,225,980	1,069,783
Tier 1 risk-based capital, Actual Amount	1,225,980	1,069,783
Total risk-based capital, Actual Amount	$ 1,372,629	$ 1,202,738
Tier 1 Leverage, Actual Ratio	8.25%	8.46%
Tier 1 risk-based capital, Actual Ratio	10.03%	10.08%
Total risk-based capital, Actual Ratio	11.23%	11.33%

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Loss Sharing Agreements and FDIC Loss Share Receivable (Tables)

9 Months Ended

Sep. 30, 2014

Text Block [Abstract]

Schedule of FDIC Loss Share Receivables

The following is a summary of FDIC loss share receivables year-to-date activity:

	Nine Months Ended
	September 30
(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		1,153			(58,565	)
Amortization		(61,393	)		(68,707	)
Submission of reimbursable losses to (recoveries payable to) the FDIC		4,901			(44,910	)
Impairment		(5,097	)		(31,813	)
Changes due to a change in cash flow assumptions on OREO and other changes		(7,164	)		(14,189	)
Balance at end of period	$	94,712		$	204,885

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Earnings Per Share - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Earnings Per Share Basic And Diluted [Line Items]
Weighted average number of shares, Recognition and Retention Plan	621,341	642,764	630,320	645,793
Weighted average number of shares, treasury stock	1,838,144	2,189,978	1,901,277	2,249,068
Stock Options [Member]
Earnings Per Share Basic And Diluted [Line Items]
Stock options having antidilutive effect on earnings per share	12,765	402,344	12,765	678,604

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Capital Requirements and Other Regulatory Matters

9 Months Ended

Sep. 30, 2014

Banking and Thrift [Abstract]

Capital Requirements and Other Regulatory Matters

NOTE 14 – 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 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 September 30, 2014 and December 31, 2013, that the Company and IBERIABANK met all capital adequacy requirements to which they are subject.

As of September 30, 2014, the most recent notification from the Federal Deposit Insurance Corporation 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 September 30, 2014 and December 31, 2013 are presented in the following table.

(Dollars in thousands)	September 30, 2014
	Minimum					Well Capitalized					Actual
	Amount		Ratio			Amount		Ratio			Amount		Ratio
Tier 1 Leverage
Consolidated	$	596,945		4.00	%	$	N/A		N/A	%	$	1,376,283		9.22	%
IBERIABANK		594,578		4.00			743,223		5.00			1,225,980		8.25
Tier 1 risk-based capital
Consolidated		490,391		4.00	%	$	N/A		N/A	%	$	1,376,283		11.23	%
IBERIABANK		489,049		4.00			733,574		6.00			1,225,980		10.03
Total risk-based capital
Consolidated		980,781		8.00	%	$	N/A		N/A	%	$	1,522,932		12.42	%
IBERIABANK		978,099		8.00			1,222,624		10.00			1,372,629		11.23

	December 31, 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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Business Segments

9 Months Ended

Sep. 30, 2014

Segment Reporting [Abstract]

Business Segments

NOTE 19 – 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.

	Three Months Ended September 30, 2014
(Dollars in thousands)	IBERIABANK			IMC			LTC			Consolidated
Interest income	$	131,362		$	1,804		$	1		$	133,167
Interest expense		11,501			625			—			12,126
Net interest income		119,861			1,179			1			121,041
Provision for loan losses		5,621			93			—			5,714
Mortgage income		(5	)		12,819			—			12,814
Title income		—			—			5,577			5,577
Other non-interest income		27,311			(37	)		(2	)		27,272
Core deposit intangible amortization		1,429			—			—			1,429
Allocated expenses		(2,386	)		1,697			689			—
Other non-interest expenses		102,692			11,624			4,315			118,631
Income before income taxes		39,811			547			572			40,930
Income tax expense		10,739			217			230			11,186
Net income	$	29,072		$	330		$	342		$	29,744
Total loans and loans held for sale	$	11,055,809		$	171,920		$	—		$	11,227,729
Total assets		15,288,157			202,923			25,529			15,516,609
Total deposits		12,371,606			6,169			—			12,377,775
Average assets		15,239,174			213,936			25,296			15,478,406

	Three Months Ended September 30, 2013
(Dollars in thousands)	IBERIABANK			IMC		LTC		Consolidated
Interest income	$	107,051		$	1,459	$	2	$	108,512
Interest expense		10,731			329		—		11,060
Net interest income		96,320			1,130		2		97,452
Provision for loan losses		1,868			146		—		2,014
Mortgage income		5			15,197		—		15,202
Title income		—			—		5,482		5,482
Other non-interest income		22,579			—		—		22,579
Core deposit intangible amortization		1,125			—		—		1,125
Allocated expenses		(2,658	)		1,933		725		—
Other non-interest expenses		90,858			12,016		4,153		107,027
Income before income taxes		27,711			2,232		606		30,549
Income tax expense		6,228			877		252		7,357
Net income	$	21,483		$	1,355	$	354	$	23,192
Total loans and loans held for sale	$	9,024,959		$	126,363	$	—	$	9,151,322
Total assets		12,965,373			153,402		26,302		13,145,077
Total deposits		10,946,453			4,311		—		10,950,764
Average assets		12,761,165			157,144		26,126		12,944,435

	Nine Months Ended September 30, 2014
(Dollars in thousands)	IBERIABANK			IMC			LTC			Consolidated
Interest income	$	362,054		$	4,563		$	2		$	366,619
Interest expense		30,869			1,323			—			32,192
Net interest income		331,185			3,240			2			334,427
Provision for loan losses		12,481			84			—			12,565
Mortgage income		80			40,823			—			40,903
Title income		—			—			15,007			15,007
Other non-interest income		73,460			(61	)		(2	)		73,397
Core deposit intangible amortization		3,779			—			—			3,779
Allocated expenses		(9,110	)		6,432			2,678			—
Other non-interest expenses		305,121			33,558			12,405			351,084
Income (loss) before income taxes		92,454			3,928			(76	)		96,306
Income tax expense (benefit)		24,081			1,552			(14	)		25,619
Net income (loss)	$	68,373		$	2,376		$	(62	)	$	70,687
Total loans and loans held for sale	$	11,055,809		$	171,920		$	—		$	11,227,729
Total assets		15,288,157			202,923			25,529			15,516,609
Total deposits		12,371,606			6,169			—			12,377,775
Average assets		14,097,930			179,218			25,003			14,302,151

	Nine Months Ended September 30, 2013
(Dollars in thousands)	IBERIABANK			IMC			LTC		Consolidated
Interest income	$	318,646		$	4,428		$	31	$	323,105
Interest expense		34,786			1,513			—		36,299
Net interest income		283,860			2,915			31		286,806
Provision for loan losses		320			125			—		445
Mortgage income		2			51,839			—		51,841
Title income		—			—			16,199		16,199
Other non-interest income		62,206			(4	)		—		62,202
Core deposit intangible amortization		3,375			—			—		3,375
Allocated expenses		(4,402	)		3,213			1,189		—
Other non-interest expenses		315,332			38,942			12,761		367,035
Income before income taxes		31,443			12,470			2,280		46,193
Income tax expense (benefit)		884			4,897			913		6,694
Net income	$	30,559		$	7,573		$	1,367	$	39,499
Total loans and loans held for sale	$	9,024,959		$	126,363		$	—	$	9,151,322
Total assets		12,965,373			153,402			26,302		13,145,077
Total deposits		10,946,453			4,311			—		10,950,764
Average assets		12,747,602			193,463			25,454		12,966,519

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Share-Based Compensation - Estimate Fair Value of Share-Based Awards with Weighted-Average Assumptions (Detail) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected dividends	2.10%	2.60%
Expected volatility	35.80%	34.80%
Risk-free interest rate	2.30%	1.70%
Expected term (in years)	7 years 6 months	8 years 7 months 6 days
Weighted-average grant-date fair value	$ 21.25	$ 15.37

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Earnings Per Share - Schedule of Calculation of Basic and Diluted Earnings Per Share (Parenthetical) (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Earnings Per Share [Abstract]
Weighted average basic shares outstanding, unvested restricted stock	506,464	547,155	525,441	559,556

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Fair Value Measurements - Additional Information (Detail) (USD $)	3 Months Ended			9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Jun. 30, 2013 Branch	Sep. 30, 2014	Sep. 30, 2013	Jun. 30, 2014 Branch	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total mortgage income (loss) in the consolidated statement of comprehensive income	$ (1,600,000)	$ 0		$ 4,000,000	$ 0
Impaired non-covered loans with an outstanding balance	1,100,000			1,100,000			4,100,000
Reserve in allowance for credit losses	25,000			25,000			1,000,000
Company announced plans to close branches			10
Number of branches closed						9
Book value of company's closed branches after impairment losses	3,100,000			3,100,000			5,100,000
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	14,700,000			14,700,000
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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Share-Based Compensation (Tables)

9 Months Ended

Sep. 30, 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 three-month and nine-month periods ended September 30:

	For the Three Months Ended				For the Nine Months Ended
	September 30				September 30
(Dollars in thousands, except per share data)	2014		2013		2014		2013
Compensation expense related to stock options	$	508	$	526	$	1,545	$	1,592
Income tax benefit related to stock options		178		184		541		557
Impact on basic earnings per share		0.01		0.01		0.03		0.03
Impact on diluted earnings per share		0.01		0.01		0.03		0.03

Estimate Fair Value of Share-Based Awards with Weighted-Average Assumptions

The Company uses the Black-Scholes option pricing model to estimate the fair value of share-based awards. The following weighted-average assumptions were used for option awards outstanding during the nine-month periods ended September 30:

	2014			2013
Expected dividends		2.1	%		2.6	%
Expected volatility		35.8	%		34.8	%
Risk-free interest rate		2.3	%		1.7	%
Expected term (in years)		7.5			8.6
Weighted-average grant-date fair value	$	21.25		$	15.37

Activity Related to Stock Options

The following table represents the activity related to stock options during the periods indicated.

				Weighted Average		Weighted Average
	Number of shares			Exercise Price		Remaining Contract Life
Outstanding options, December 31, 2012		1,236,075		$	51.48
Granted		75,722			52.36
Exercised		(142,841	)		38.09
Forfeited or expired		(36,608	)		56.01
Outstanding options, September 30, 2013		1,132,348		$	53.09		4.7 Years
Exercisable options, September 30, 2013		749,545			52.94		3.2 Years
Outstanding options, December 31, 2013		1,072,829		$	53.47
Granted		77,098			65.30
Exercised		(234,363	)		48.36
Forfeited or expired		(13,446	)		60.82
Outstanding options, September 30, 2014		902,118		$	55.70		5.2 Years
Exercisable options, September 30, 2014		581,423			55.65		3.8 Years

Unvested Restricted Stock Award Activity

The following table represents unvested restricted stock award activity for the nine months ended September 30:

	2014			2013
Balance at beginning of period		523,756			538,202
Granted		146,547			166,223
Forfeited		(18,171	)		(27,483	)
Earned and issued		(152,112	)		(136,629	)
Balance at end of period		500,020			540,313

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, 2012		318,729			16,035			334,764		$	16,444,000
Granted		166,664			8,793			175,457			9,108,000
Forfeited share equivalents		(16,381	)		(681	)		(17,062	)		(886,000	)
Vested share equivalents		(45,065	)		(3,327	)		(48,392	)		(2,453,000	)
Balance, September 30, 2013		423,947			20,820			444,767		$	23,088,000
Balance, December 31, 2013		417,238			22,351			439,589		$	27,628,000
Granted		115,620			7,147			122,767			7,674,000
Forfeited share equivalents		(19,498	)		(1,751	)		(21,249	)		(1,328,000	)
Vested share equivalents		(68,480	)		(6,615	)		(75,095	)		(5,002,000	)
Balance, September 30, 2014		444,880			21,132			466,012		$	29,130,000

⁽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 $62.51 and $51.91 on September 30, 2014 and 2013, 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 Three Months Ended September 30				For the Nine Months Ended September 30
(Dollars in thousands)	2014		2013		2014		2013
Compensation expense related to restricted stock	$	2,497	$	2,212	$	7,382	$	6,407

Phantom Stock Awards [Member]

Compensation Expense Included in Non-Interest Expense and Related Income Tax Benefits

The following table indicates compensation expense recorded for phantom stock based on the number of share equivalents vested at the end of the periods indicated and the current market price of the Company’s stock at that time.

	For the Three Months Ended September 30				For the Nine Months Ended September 30
(Dollars in thousands)	2014		2013		2014		2013
Compensation expense related to phantom stock	$	619	$	792	$	3,692	$	2,602

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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	9 Months Ended
	Sep. 30, 2014
Noninterest Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total gains (losses) included in earnings (or changes in net assets)	$ (1,697)
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 September 30, 2014	$ 16,235

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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, 2012	$ 1,529,868	$ 31,917	$ 1,176,180	$ 411,472	$ 24,477	$ (114,178)
Beginning balance, Shares at Dec. 31, 2012		31,917,385				2,427,640
Net income	39,499			39,499
Other comprehensive income (loss)	(25,794)				(25,794)
Cash dividends declared, $1.02 per share	(30,307)			(30,307)
Reissuance of treasury stock under incentive plans, net of shares surrendered in payment, including tax benefit	4,003		(966)			4,969
Reissuance of treasury stock under incentive plans, Shares						(94,949)
Treasury stock issued for recognition and retention plans			(8,016)			8,016
Treasury stock issued for recognition and retention plans, Shares						(149,765)
Share-based compensation cost	7,999		7,999
Ending balance at Sep. 30, 2013	1,525,268	31,917	1,175,197	420,664	(1,317)	(101,193)
Ending balance, Shares at Sep. 30, 2013		31,917,385				2,182,926
Beginning balance at Dec. 31, 2013	1,530,979	31,917	1,178,284	436,141	(16,491)	(98,872)
Beginning balance, Shares at Dec. 31, 2013		31,917,385				2,130,841
Net income	70,687			70,687
Other comprehensive income (loss)	16,235				16,235
Cash dividends declared, $1.02 per share	(32,943)			(32,943)
Reissuance of treasury stock under incentive plans, net of shares surrendered in payment, including tax benefit	8,998		2,168			6,830
Reissuance of treasury stock under incentive plans, Shares						(180,423)
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			(6,080)			6,080
Treasury stock issued for recognition and retention plans, Shares						(128,376)
Share-based compensation cost	8,927		8,927
Ending balance at Sep. 30, 2014	$ 1,817,548	$ 35,263	$ 1,394,618	$ 473,885	$ (256)	$ (85,962)
Ending balance, Shares at Sep. 30, 2014		35,262,901				1,822,042

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Derivative Instruments and Other Hedging Activities - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Cash as collateral for derivative transactions	$ 8.4	$ 5.0
Fair value of derivatives	$ 0.1

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Earnings Per Share

9 Months Ended

Sep. 30, 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. These awards are included in the calculation of basic earnings per share 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.

The following table presents the calculation of basic and diluted earnings per share for the periods indicated.

	For the Three Months Ended						For the Nine Months Ended
	September 30						September 30
(Dollars in thousands, except per share data)	2014			2013			2014			2013
Income available to common shareholders	$	29,744		$	23,192		$	70,687		$	39,499
Distributed earnings (capital) to unvested restricted stock		(444	)		(421	)		(1,134	)		(744	)
Distributed earnings (capital) to common shareholders—basic		29,300			22,771			69,553			38,755
Undistributed earnings reallocated to unvested restricted stock		(4	)		(4	)		(25	)		—
Distributed and undistributed earnings to common shareholders—diluted	$	29,296		$	22,767		$	69,528		$	38,755
Weighted average shares outstanding—basic (1)		33,309,881			29,631,799			31,316,267			29,582,081
Weighted average shares outstanding—diluted		32,926,969			29,147,232			30,923,050			29,062,238
Earnings per common share—basic	$	0.89		$	0.78		$	2.26		$	1.34
Earnings per common share—diluted		0.89			0.78			2.25			1.33
Earnings per unvested restricted stock share—basic		0.88			0.77			2.16			1.33
Earnings per unvested restricted stock share—diluted		0.89			0.78			2.21			1.33

(1) Weighted average basic shares outstanding include 506,464 and 547,155 shares of unvested restricted stock for the three months ended September 30, 2014 and 2013, respectively, and 525,441 and 559,556 shares for the nine months ended September 30, 2014 and 2013, respectively.

Additional information on the Company’s basic earnings per common share is shown in the following table.

	For the Three Months Ended				For the Nine Months Ended
	September 30				September 30
(Dollars in thousands, except per share data)	2014		2013		2014		2013
Distributed earnings to common shareholders	$	11,200	$	9,926	$	32,430	$	29,736
Undistributed earnings (distributed capital) to common shareholders		18,100		12,845		37,123		9,019
Total earnings to common shareholders	$	29,300	$	22,771	$	69,553	$	38,755
Distributed earnings to unvested restricted stock	$	170	$	183	$	529	$	571
Undistributed earnings (distributed capital) to unvested restricted stock		274		238		605		173
Total earnings allocated to restricted stock	$	444	$	421	$	1,134	$	744
Distributed earnings per common share	$	0.34	$	0.34	$	1.05	$	1.03
Undistributed earnings (distributed capital) per common share		0.55		0.44		1.21		0.31
Total earnings per common share—basic	$	0.89	$	0.78	$	2.26	$	1.34
Distributed earnings per unvested restricted stock share	$	0.34	$	0.34	$	1.01	$	1.02
Undistributed earnings (distributed capital) per unvested restricted stock share		0.54		0.43		1.15		0.31
Total earnings per unvested restricted stock share—basic	$	0.88	$	0.77	$	2.16	$	1.33

For the three months ended September 30, 2014 and 2013, the calculations for basic shares outstanding exclude the weighted average shares owned by the Recognition and Retention Plan (“RRP”) of 621,341 and 642,764, respectively, and are adjusted for the weighted average shares in treasury stock of 1,838,144 and 2,189,978, respectively. For the nine months ended September 30, 2014 and 2013, basic shares outstanding exclude 630,320 and 645,793 shares owned by the RRP, respectively, and are adjusted for 1,901,277 and 2,249,068 shares, respectively, of weighted average shares of treasury stock.

The effects from the assumed exercises of 12,765 and 402,344 stock options were not included in the computation of diluted earnings per share for the three months ended September 30, 2014 and 2013, respectively, because such amounts would have had an antidilutive effect on earnings per common share. For the nine months ended September 30, 2014 and 2013, the effects from the assumed exercise of 12,765 and 678,604 stock options, respectively, was not included in the computation of diluted earnings per share because such amounts would have had an antidilutive effect on earnings per common share.

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Investment Securities - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2014 Security	Sep. 30, 2013	Sep. 30, 2014 Security	Sep. 30, 2013	Dec. 31, 2013 Bonds Security
Net Investment Income [Line Items]
Pledged securities, carrying values	$ 1,400,000,000		$ 1,400,000,000		$ 1,500,000,000
Number of debt securities, held	162		162		207
Unrealized losses on debt securities, percent of amortized cost	1.64%		1.64%		3.23%
Unrealized losses on debt securities, percent of Company's total amortized cost	0.89%		0.89%		2.07%
Unrated revenue municipal bond					1
Impairment of par value bond, percentage			50.00%
Gain (loss) on sale of available for sale investments	$ 582,000	$ (3,000)	$ 609,000	$ 2,259,000
Obligations of State and Political Obligations [Member]
Net Investment Income [Line Items]
Number of securities, continuous loss position, over twelve months	6		6

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Goodwill and Other Acquired Intangible Assets - Schedule of Carrying Amount of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended			9 Months Ended					9 Months Ended
	Sep. 30, 2014	Jan. 17, 2014	Dec. 31, 2012	Sep. 30, 2014 IBERIABANK [Member]	Dec. 31, 2012 IBERIABANK [Member]	Sep. 30, 2014 IMC [Member]	Dec. 31, 2013 IMC [Member]	Dec. 31, 2012 IMC [Member]	Sep. 30, 2014 LTC [Member]	Dec. 31, 2012 LTC [Member]
Goodwill And Other Intangibles [Line Items]
Balance, December 31, 2012	$ 401,872	$ 8,600	$ 401,872	$ 373,905	$ 373,905	$ 23,178	$ 23,178	$ 23,178	$ 4,789	$ 4,789
Goodwill acquired during the period	124,370			123,995					375
Balance, December 31, 2013	$ 526,242	$ 8,600	$ 401,872	$ 497,900	$ 373,905	$ 23,178	$ 23,178	$ 23,178	$ 5,164	$ 4,789

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Fair Value Measurements - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities, Assets	$ 2,103,828,000	$ 1,936,797,000
Mortgage loans held for sale, Assets	148,530,000	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	2,103,828,000	1,936,797,000
Mortgage loans held for sale, Assets	148,530,000	97,273,000
Derivative instruments, Assets	32,290,000	30,076,000
Total, Assets	2,284,648,000	2,064,146,000
Derivative instruments, Liabilities	29,840,000	26,735,000
Total, Liabilities	29,840,000	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	46,261,000	15,496,000
Mortgage loans held for sale, Assets
Derivative instruments, Assets
Total, Assets	46,261,000	15,496,000
Derivative instruments, Liabilities
Total, Liabilities
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	2,057,567,000	1,921,301,000
Mortgage loans held for sale, Assets	148,530,000	97,273,000
Derivative instruments, Assets	32,290,000	30,076,000
Total, Assets	2,238,387,000	2,048,650,000
Derivative instruments, Liabilities	29,840,000	26,735,000
Total, Liabilities	29,840,000	26,735,000
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities, Assets
Mortgage loans held for sale, Assets
Derivative instruments, Assets
Total, Assets
Derivative instruments, Liabilities
Total, Liabilities

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Loans Receivable - Schedule of Carrying Amount of Loans Acquired (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractually required principal and interest at acquisition	$ 98,097
Nonaccretable difference (expected losses and foregone interest)	(4,558)
Cash flows expected to be collected at acquisition	93,539
Accretable yield	(9,778)
Basis in acquired loans at acquisition	83,761
Acquired Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractually required principal and interest at acquisition	82,967
Nonaccretable difference (expected losses and foregone interest)	(4,197)
Cash flows expected to be collected at acquisition	78,770
Accretable yield	(8,242)
Basis in acquired loans at acquisition	70,528
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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Subsequent Events

9 Months Ended

Sep. 30, 2014

Subsequent Events [Abstract]

Subsequent Events

NOTE 20 – SUBSEQUENT EVENTS

Acquisition of Florida Bank Group, Inc.

During the forth 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 and is expected to close in the first quarter of 2015, subject to customary closing conditions, including the receipt of required regulatory approvals and the approval of Florida Bank Group’s shareholders.

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, subject to certain market price adjustments provided for in the agreement. 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 and is expected to close in the first quarter of 2015, subject to customary closing conditions, including the receipt of required regulatory approvals and the approval of Old Florida’s shareholders.

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.

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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	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	$ 143,074	$ 251,603
(Reversal of) Provision for loan losses before adjustment attributable to FDIC loss share agreements	13,718	(58,120)
Adjustment attributable to FDIC loss share arrangements	(1,153)	58,565
Net (reversal of) provision for loan losses	12,565	445
Adjustment attributable to FDIC loss share arrangements	1,153	(58,565)
Transfer of balance to OREO	(5,378)	(30,315)
Transfer of balance to the RULC		(9,828)
Loans charged-off	(21,651)	(9,148)
Recoveries	4,777	4,353
Balance at end of period	134,540	148,545
Balance at beginning of period	11,147
Transfer of balance from the allowance for loan losses		9,828
Provision for unfunded lending commitments	952	2,131
Balance at end of period	12,099	11,959
Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	67,342	74,211
(Reversal of) Provision for loan losses before adjustment attributable to FDIC loss share agreements	9,099	2,884
Adjustment attributable to FDIC loss share arrangements
Net (reversal of) provision for loan losses	9,099	2,884
Adjustment attributable to FDIC loss share arrangements
Transfer of balance to OREO
Transfer of balance to the RULC		(9,828)
Loans charged-off	(8,242)	(7,455)
Recoveries	4,338	4,353
Balance at end of period	72,537	64,165
Balance at beginning of period	11,147
Transfer of balance from the allowance for loan losses		9,828
Provision for unfunded lending commitments	952	2,131
Balance at end of period	12,099	11,959
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	(1,259)	(2,464)
Adjustment attributable to FDIC loss share arrangements
Net (reversal of) provision for loan losses	(1,259)	(2,464)
Adjustment attributable to FDIC loss share arrangements
Transfer of balance to OREO	(207)	(1,013)
Transfer of balance to the RULC
Loans charged-off	(586)	(10)
Recoveries	401
Balance at end of period	2,906	5,329
Balance at beginning of period
Transfer of balance from the allowance for loan losses
Provision for unfunded lending commitments
Balance at end of period
Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	71,175	168,576
(Reversal of) Provision for loan losses before adjustment attributable to FDIC loss share agreements	5,878	(58,540)
Adjustment attributable to FDIC loss share arrangements	(1,153)	58,565
Net (reversal of) provision for loan losses	4,725	25
Adjustment attributable to FDIC loss share arrangements	1,153	(58,565)
Transfer of balance to OREO	(5,171)	(29,302)
Transfer of balance to the RULC
Loans charged-off	(12,823)	(1,683)
Recoveries	38
Balance at end of period	59,097	79,051
Balance at beginning of period
Transfer of balance from the allowance for loan losses
Provision for unfunded lending commitments
Balance at end of period

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Derivative Instruments and Other Hedging Activities (Tables)

9 Months Ended

Sep. 30, 2014

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Outstanding Derivative Instruments

Information pertaining to outstanding derivative instruments is as follows:

(Dollars in thousands)	Balance Sheet		Asset Derivatives Fair Value				Balance Sheet		Liability Derivatives Fair Value
	Location		September 30, 2014		December 31, 2013		Location		September 30, 2014		December 31, 2013
Derivatives not designated as hedging instruments under ASC Topic 815:
Interest rate contracts		Other assets	$	11,839	$	10,621		Other liabilities	$	11,839	$	10,620
Forward sales contracts		Other assets		104		1,468		Other liabilities		2,215		287
Written and purchased options		Other assets		20,347		17,987		Other liabilities		15,786		15,828
Total derivatives not designated as hedging instruments under ASC Topic 815				32,290		30,076				29,840		26,735
Total			$	32,290	$	30,076			$	29,840	$	26,735
(Dollars in thousands)			Asset Derivatives Notional Amount						Liability Derivatives Notional Amount
			September 30, 2014		December 31, 2013				September 30, 2014		December 31, 2013
Derivatives not designated as hedging instruments under ASC Topic 815:
Interest rate contracts			$	421,523	$	380,303			$	421,523	$	380,303
Forward sales contracts				88,190		192,876				351,861		45,091
Written and purchased options				363,239		295,425				197,044		199,061
Total derivatives not designated as hedging instruments under ASC Topic 815				872,952		868,604				970,428		624,455
Total			$	872,952	$	868,604			$	970,428	$	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.

	September 30, 2014
(Dollars in thousands)	Gross Amounts		Gross Amounts Not Offset
	Presented in the		in the Balance Sheet
	Balance Sheet		Derivatives		Collateral (1)			Net
Derivatives subject to master netting arrangements
Derivative assets
Interest rate contracts designated as hedging instruments	$	—	$	—	$	—		$	—
Interest rate contracts not designated as hedging instruments		11,839		—		—			11,839
Written and purchased options		15,423		—		—			15,423
Total derivative assets subject to master netting arrangements	$	27,262	$	—	$	—		$	27,262
Derivative liabilities
Interest rate contracts designated as hedging instruments	$	—	$	—	$	—		$	—
Interest rate contracts not designated as hedging instruments		11,839		—		(3,892	)		7,947
Total derivative liabilities subject to master netting arrangements	$	11,839	$	—	$	(3,892	)	$	7,947

⁽¹⁾ Consists of cash collateral recorded at cost, which approximates fair value, and investment securities.

	December 31, 2013
(Dollars in thousands)	Gross Amounts		Gross Amounts Not Offset
	Presented in the		in the Balance Sheet
	Balance Sheet		Derivatives		Collateral (1)			Net
Derivatives subject to master netting arrangements
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 September 30, 2014 and 2013, and for the three and nine months 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 September 30					For the Three Months Ended September 30
Derivatives in ASC Topic 815 Cash
Flow Hedging Relationships	2014		2013			2014		2013			2014		2013
Interest rate contracts	$	—	$	—	Other income (expense)	$	—	$	—	Other income (expense)	$	—	$	—
Total	$	—	$	—		$	—	$	—		$	—	$	—

											Location of Gain (Loss)			Amount of Gain
											Recognized in Income on			(Loss) Recognized in
			Location of Gain			Amount of Gain					Derivative (Ineffective			Income on
Amount of Gain (Loss)			(Loss) Reclassified			(Loss) Reclassified					Portion and Amount			Derivative (Ineffective
Recognized in OCI net of taxes (Effective			from Accumulated OCI into Income			from Accumulated OCI into Income					Excluded from Effectiveness			Portion and Amount Excluded from
Portion)			(Effective Portion)			(Effective Portion)					Testing			Effectiveness Testing)
As of September 30						For the Nine Months Ended September 30
2014	2013					2014		2013						2014			2013
$                —	$	—		Other income (expense	)	$	—	$	(392	)		Other income (expense	)	$	(1	)	$	—
$                —	$	—				$	—	$	(392	)				$	(1	)	$	—

(Dollars in thousands)	Amount of Gain (Loss) Recognized in Income on Derivatives
Derivatives Not Designated as	Location of Gain (Loss)
Hedging Instruments under ASC	Recognized in Income on	For the Three Months Ended						For the Nine Months Ended
Topic 815	Derivatives	September 30						September 30
		2014			2013			2014			2013
Interest rate contracts	Other income (expense)	$	406		$	2,061			1,971			2,542
Forward sales contracts	Mortgage Income		(3,648	)		3,290			(7,512	)		897
Written and purchased options	Mortgage Income		773			(7,896	)		2,401			(3,820	)
Total		$	(2,469	)	$	(2,545	)	$	(3,140	)	$	(381	)

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Shareholders' Equity and Other Comprehensive Income (Loss)

9 Months Ended

Sep. 30, 2014

Equity [Abstract]

Shareholders' Equity and Other Comprehensive Income (Loss)

NOTE 13 – 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 periods indicated:

	Three Months Ended
	September 30, 2014
	Before			Tax Expense		Net-of-Tax
(Dollars in thousands)	Tax			(Benefit)		Amount
Unrealized gain on securities:
Unrealized holding losses arising during the period	$	(7,032	)	$	2,461	$	(4,571	)
Less: reclassification adjustment for gains included in net income		(582	)		204		(378	)
Net unrealized losses		(7,614	)		2,665		(4,949	)
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	$	—		$	—	$	—
Less: reclassification adjustment for losses (gains) included in net income		—			—		—
Fair value of derivative instruments designated as cash flow hedges		—			—		—
Total other comprehensive loss	$	(7,614	)	$	2,665	$	(4,949	)

	Three Months Ended
	September 30, 2013
	Before		Tax Expense			Net-of-Tax
(Dollars in thousands)	Tax		(Benefit)			Amount
Unrealized gain on securities:
Unrealized holding gains arising during the period	$	5,528	$	(1,935	)	$	3,593
Less: reclassification adjustment for losses included in net income		3		(1	)		2
Net unrealized losses		5,531		(1,936	)		3,595
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	$	—	$	—		$	—
Less: reclassification adjustment for gains included in net income		—		—			—
Fair value of derivative instruments designated as cash flow hedges		—		—			—
Total other comprehensive income	$	5,531	$	(1,936	)	$	3,595

	Nine Months Ended
	September 30, 2014
	Before			Tax Expense			Net-of-Tax
(Dollars in thousands)	Tax			(Benefit)			Amount
Unrealized loss on securities:
Unrealized holding gains arising during the period	$	25,586		$	(8,955	)	$	16,631
Less: reclassification adjustment for gains included in net income		(609	)		213			(396	)
Net unrealized gains		24,977			(8,742	)		16,235
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	$	—		$	—		$	—
Less: reclassification adjustment for losses (gains) included in net income		—			—			—
Fair value of derivative instruments designated as cash flow hedges		—			—			—
Total other comprehensive income	$	24,977		$	(8,742	)	$	16,235
	Nine Months Ended
	September 30, 2013
	Before			Tax Expense			Net-of-Tax
(Dollars in thousands)	Tax			(Benefit)			Amount
Unrealized gain on securities:
Unrealized holding losses arising during the period	$	(38,769	)	$	13,569		$	(25,200	)
Less: reclassification adjustment for gains included in net income		(2,259	)		791			(1,468	)
Net unrealized losses		(41,028	)		14,360			(26,668	)
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	$	952		$	(333	)	$	619
Less: reclassification adjustment for losses included in net income		392			(137	)		255
Fair value of derivative instruments designated as cash flow hedges		1,344			(470	)		874
Total other comprehensive loss	$	(39,684	)	$	13,890		$	(25,794	)

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Share-Based Compensation - Schedule of Share and Dividend Equivalent Share Award Activity (Parenthetical) (Detail) (USD $)	Sep. 30, 2014	Sep. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Market price of Company's stock	$ 62.51	$ 51.91