10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2013

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, 2013, the Registrant had 29,775,721 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)		3
	Consolidated Balance Sheets as of September 30, 2013 and December 31, 2012		3
	Consolidated Statements of Comprehensive Income for the three and nine months ended September 30, 2013 and 2012		4
	Consolidated Statements of Shareholders’ Equity for the nine months ended September 30, 2013 and 2012		5
	Consolidated Statements of Cash Flows for the nine months ended September 30, 2013 and 2012		6
	Notes to Unaudited Consolidated Financial Statements		7
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations		49
Item 3.	Quantitative and Qualitative Disclosures About Market Risk		92
Item 4.	Controls and Procedures		92
Part II.	Other Information
Item 1.	Legal Proceedings		93
Item 1A.	Risk Factors		93
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds		93
Item 3.	Defaults Upon Senior Securities		93
Item 4.	Mine Safety Disclosures		93
Item 5.	Other Information		93
Item 6.	Exhibits		94
Signatures			95

Part I

Financial Information

Item 1. Financial Statements

IBERIABANK CORPORATION AND SUBSIDIARIES

Consolidated Balance Sheets

(Dollars in thousands, except share data)	(unaudited) September 30 2013			December 31 2012
Assets
Cash and due from banks	$	260,742		$	248,214
Interest-bearing deposits in banks		292,706			722,763
Total cash and cash equivalents		553,448			970,977
Securities available for sale, at fair value		1,964,389			1,745,004
Securities held to maturity, fair values of $155,310 and $211,498, respectively		155,678			205,062
Mortgage loans held for sale		108,285			267,475
Loans covered by loss share agreements		807,002			1,092,756
Non-covered loans, net of unearned income		8,236,035			7,405,824
Total loans, net of unearned income		9,043,037			8,498,580
Allowance for credit losses		(148,545	)		(251,603	)
Loans, net		8,894,492			8,246,977
FDIC loss share receivables		204,885			423,069
Premises and equipment, net		289,157			303,523
Goodwill		401,872			401,872
Other assets		572,871			565,719
Total Assets	$	13,145,077		$	13,129,678
Liabilities
Deposits:
Noninterest-bearing	$	2,529,296		$	1,967,662
Interest-bearing		8,421,468			8,780,615
Total deposits		10,950,764			10,748,277
Short-term borrowings		258,850			303,045
Long-term debt		281,101			423,377
Other liabilities		129,094			125,111
Total Liabilities		11,619,809			11,599,810
Shareholders’ Equity
Common stock, $1 par value - 50,000,000 shares authorized; 31,917,385 shares issued		31,917			31,917
Additional paid-in capital		1,175,197			1,176,180
Retained earnings		420,664			411,472
Accumulated other comprehensive income (loss)		(1,317	)		24,477
Treasury stock at cost - 2,182,926 and 2,427,640 shares, respectively		(101,193	)		(114,178	)
Total Shareholders’ Equity		1,525,268			1,529,868
Total Liabilities and Shareholders’ Equity	$	13,145,077		$	13,129,678

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

3

IBERIABANK CORPORATION AND SUBSIDIARIES

Consolidated Statements of Comprehensive Income

(unaudited)

	For The Three Months Ended September 30						For The Nine Months Ended September 30
(Dollars in thousands, except per share data)	2013			2012			2013			2012
Interest and Dividend Income
Loans, including fees	$	120,035		$	133,397		$	358,344		$	382,212
Mortgage loans held for sale, including fees		1,289			1,466			3,965			3,747
Investment securities:
Taxable interest		7,837			8,133			22,241			26,745
Tax-exempt interest		1,649			1,809			5,082			5,589
Amortization of FDIC loss share receivable		(22,875	)		(33,488	)		(68,707	)		(89,899	)
Other		577			634			2,180			2,028
Total interest and dividend income		108,512			111,951			323,105			330,422
Interest Expense
Deposits:
NOW and MMDA		4,441			5,863			14,462			17,942
Savings		71			154			238			459
Time deposits		4,012			5,530			13,038			19,755
Short-term borrowings		104			197			365			507
Long-term debt		2,432			3,481			8,196			9,999
Total interest expense		11,060			15,225			36,299			48,662
Net interest income		97,452			96,726			286,806			281,760
Provision for loan losses		2,014			4,053			445			15,805
Net interest income after provision for loan losses		95,438			92,673			286,361			265,955
Noninterest Income
Service charges on deposit accounts		7,512			6,952			21,415			19,557
Mortgage income		15,202			23,215			51,841			55,118
Title revenue		5,482			5,623			16,199			15,495
ATM/debit card fee income		2,476			2,377			7,017			6,566
Income from bank owned life insurance		908			916			2,747			2,771
Gain (loss) on sale of available for sale investments		(3	)		41			2,259			3,743
Derivative losses reclassified from other comprehensive income		—			(409	)		(392	)		(1,195	)
Broker commissions		3,950			3,092			11,347			9,254
Other income		7,736			4,746			17,809			14,334
Total noninterest income		43,263			46,553			130,242			125,643
Noninterest Expense
Salaries and employee benefits		59,234			59,938			185,578			172,878
Net occupancy and equipment		14,572			13,869			44,050			39,496
Impairment of FDIC loss share receivables and other long-lived assets		1,319			—			37,750			2,743
Franchise and shares tax		911			1,023			2,986			3,664
Communication and delivery		2,899			3,152			9,286			9,424
Marketing and business development		2,350			2,189			8,486			7,964
Data processing		4,837			4,931			13,093			11,537
Printing, stationery and supplies		581			848			2,004			2,523
Amortization of acquisition intangibles		1,179			1,287			3,543			3,865
Professional services		4,156			5,947			13,675			15,665
Costs of OREO property, net		(359	)		270			980			4,453
Credit and other loan related expense		5,248			4,846			13,155			13,709
Insurance		3,125			2,615			8,408			7,745
Travel and entertainment		1,912			2,398			6,199			7,158
Other expenses		6,188			6,535			21,217			15,920
Total noninterest expense		108,152			109,848			370,410			318,744
Income before income tax expense		30,549			29,378			46,193			72,854
Income tax expense		7,357			8,144			6,694			19,667
Net Income		23,192			21,234			39,499			53,187
Income Available to Common Shareholders - Basic	$	23,192		$	21,234		$	39,499		$	53,187
Earnings Allocated to Unvested Restricted Stock		(425	)		(406	)		(744	)		(1,007	)
Earnings Available to Common Shareholders - Diluted		22,767			20,828			38,755			52,180
Earnings per common share - Basic	$	0.78		$	0.73		$	1.34		$	1.81
Earnings per common share - Diluted		0.78			0.73			1.33			1.81
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	$	5,528		$	6,099		$	(38,769	)	$	8,236
Less: reclassification adjustment for gains (losses) included in net income		3			(41	)		(2,259	)		(3,743	)
Unrealized (loss) gain on securities, before tax		5,531			6,058			(41,028	)		4,493
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		—			800			952			(1,882	)
Less: reclassification adjustment for losses (gains) included in net income		—			409			392			1,195
Fair value of derivative instruments designated as cash flow hedges, before tax		—			1,209			1,344			(687	)
Other comprehensive income (loss), before tax		5,531			7,267			(39,684	)		3,806
Income tax expense (benefit) related to items of other comprehensive income (loss)		1,936			2,543			(13,890	)		1,332
Other comprehensive income (loss), net of tax		3,595			4,724			(25,794	)		2,474
Comprehensive income	$	26,787		$	25,958		$	13,705		$	55,661

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

4

IBERIABANK CORPORATION AND SUBSIDIARIES

Consolidated Statements of Shareholders’ Equity

(unaudited)

	Common Stock				Additional Paid-In Capital			Retained Earnings			Accumulated Other Comprehensive Income (Loss)			Treasury Stock
(Dollars in thousands, except share and per share data)	Shares		Amount											Shares			Amount			Total
Balance, December 31, 2011		31,163,070	$	31,163	$	1,135,880		$	375,184		$	24,457			1,789,165		$	(84,023	)		1,482,661
Net income		—		—		—			53,187			—			—			—			53,187
Other comprehensive income		—		—		—			—			2,474			—			—			2,474
Cash dividends declared, $1.02 per share		—		—		—			(30,080	)		—			—			—			(30,080	)
Reissuance of treasury stock under incentive plan, net of shares surrendered in payment, including tax benefit		—		—		17			—			—			(181,836	)		819			836
Common stock issued for acquisitions		754,334		754		38,449															39,203
Common stock issued for recognition and retention plan		—		—		(7,776	)		—			—			—			7,776			—
Share-based compensation cost		—		—		7,306			—			—			—			—			7,306
Treasury stock acquired at cost		—		—		—			—			—			853,308			(40,433	)		(40,433	)
Balance, September 30, 2012		31,917,404	$	31,917	$	1,173,876		$	398,291		$	26,931			2,460,637		$	(115,861	)	$	1,515,154
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 plan, net of shares surrendered in payment, including tax benefit		—		—		(966	)		—			—			(244,714	)		4,969			4,003
Common stock issued for recognition and retention plan		—		—		(8,016	)		—			—			—			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

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

5

IBERIABANK CORPORATION AND SUBSIDIARIES

Consolidated Statements of Cash Flows

(unaudited)

	For The Nine Months Ended September 30
(Dollars in thousands)				(Restated)
	2013			2012
Cash Flows from Operating Activities
Net income	$	39,499		$	53,187
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		19,851			15,870
Amortization of purchase accounting adjustments, net		(1,186	)		(27,896	)
Provision for loan losses		445			15,805
Share-based equity compensation expense		7,999			7,306
(Gain) loss on sale of assets		(51	)		144
Gain on sale of available for sale investments		(2,259	)		(3,743	)
Gain on sale of OREO		(5,211	)		(4,083	)
Loss on abandonment of fixed assets		4,941			2,743
Impairment of FDIC loss share receivables		31,813			—
Amortization of premium/discount on investments		15,426			15,365
Derivative (gains) losses on swaps		(209	)		1
Benefit for deferred income taxes		(7,802	)		(5,264	)
Originations of mortgage loans held for sale		(1,712,557	)		(1,749,121	)
Proceeds from sales of mortgage loans held for sale		1,923,455			1,742,830
Gain on sale of mortgage loans held for sale, net		(51,709	)		(51,828	)
Tax benefit associated with share-based payment arrangements		(495	)		(940	)
(Increase) decrease in other assets		(15,759	)		9,823
Other operating activities, net		30,079			23,826
Net Cash Provided by Operating Activities		276,270			44,025
Cash Flows from Investing Activities
Proceeds from sales of securities available for sale		44,672			153,397
Proceeds from maturities, prepayments and calls of securities available for sale		618,059			739,734
Purchases of securities available for sale		(935,341	)		(795,178	)
Proceeds from maturities, prepayments and calls of securities held to maturity		54,372			40,071
Purchases of securities held to maturity		(5,901	)		(37,236	)
FDIC reimbursement of recoverable covered asset losses		56,311			114,564
Increase in loans receivable, net		(595,315	)		(630,229	)
Proceeds from sale of premises and equipment		7,371			355
Purchases of premises and equipment		(12,592	)		(22,922	)
Proceeds from disposition of real estate owned		76,150			80,282
Investment in new market tax credit entities		(1,696	)		(20,000	)
Cash received in excess of cash paid for acquisition		—			32,425
Other investing activities, net		8,963			6,088
Net Cash Used in Investing Activities		(684,947	)		(338,649	)
Cash Flows from Financing Activities
Increase in deposits, net of deposits acquired		202,959			339,379
Net change in short-term borrowings, net of borrowings acquired		(44,196	)		126,136
Proceeds from long-term debt		2,230			23,449
Repayments of long-term debt		(143,625	)		(74,920	)
Dividends paid to shareholders		(30,223	)		(30,053	)
Proceeds from sale of treasury stock for stock options exercised		5,441			1,541
Payments to repurchase common stock		(1,933	)		(42,078	)
Tax benefit associated with share-based payment arrangements		495			940
Net Cash (Used in) Provided by Financing Activities		(8,852	)		344,394
Net (Decrease) Increase In Cash and Cash Equivalents		(417,529	)		49,770
Cash and Cash Equivalents at Beginning of Period		970,977			573,296
Cash and Cash Equivalents at End of Period	$	553,448		$	623,066
Supplemental Schedule of Noncash Activities
Acquisition of real estate in settlement of loans	$	82,383		$	82,780
Common stock issued in acquisition	$	—		$	39,203
Transfers of property into Other Real Estate	$	82,383		$	82,780
Supplemental Disclosures
Cash paid for:
Interest on deposits and borrowings	$	36,888		$	49,529
Income taxes, net	$	19,891		$	10,902

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, 2012.

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, IBERIA Asset Management Inc. (“IAM”), and IBERIA CDE, LLC (“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. IB Aircraft Holdings, LLC owns a fractional share of an aircraft used by management of the Company and its subsidiaries. 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.

SEGMENTS

All of the Company’s banking operations are considered by management to be aggregated in one reportable operating segment. Because the overall banking operations comprise substantially all of the consolidated operations and none of the Company’s other subsidiaries, either individually or in the aggregate, meet quantitative materiality thresholds, no separate segment disclosures are presented in these consolidated financial statements. The Company has invested in its financial reporting infrastructure to report financial information associated with performance of segments. The Company anticipates reporting this information at the end of 2013.

FDIC LOSS SHARE RECEIVABLE

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

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

7

The Company assesses the indemnification assets for collectability at the acquisition level based on three sources: 1) the FDIC, 2) OREO transactions, and 3) customers. Amounts collectible from the FDIC through loss reimbursements are comprised of losses currently expected within the loss share term. A current period impairment would be recorded to the extent that events or circumstances indicate that losses previously expected to occur within the loss share term are expected to occur subsequent to loss share termination. Amounts collectible through expected gains on the sale of OREO are written-up or impaired each period based on the best available information. Amounts collectible from customers in the form of accretion are deemed collectible to the extent that net acquisition-level yield, which primarily consists of accretion and indemnification asset amortization, are expected to remain positive over the life of the shared loss agreement. Impairment of amounts collectible from customers would be recorded as a current period charge to income, to the extent required to maintain the zero net yield floor.

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

A claim receivable is established within other assets when a loss is incurred and the indemnification asset is reduced when cash is received from the FDIC.

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

As of September 30, 2013, the Company has $108,285,000 of conforming mortgage loans held for sale. Mortgage loans originated and held for sale are carried at the lower of cost or estimated fair value. The Company obtains quotes or bids on these loans directly from purchasing financial institutions. Mortgage loans held for sale that were recorded at estimated fair value are included in Note 16.

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 obtainable market price, if available (Level 1) 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, 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 $1,437,000 and $867,000 in earnings for the three months ended September 30, 2013 and 2012, respectively, and $3,993,000 and $4,900,000 for the nine months ended September 30, 2013 and 2012, respectively.

8

Derivative financial instruments

The Company may utilize interest rate swap agreements to convert a portion of its variable-rate debt to a fixed rate (cash flow hedge). The Company also enters into commitments to originate loans whereby the interest rate on the prospective loan is determined prior to funding (“rate lock commitments”). 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.

NOTE 2 – RECENT ACCOUNTING PRONOUNCEMENTS

ASU No. 2012-06

For the quarter ended March 31, 2013, the Company adopted the provisions of ASU No. 2012-06, Business Combinations (Topic 805): Subsequent Accounting for an Indemnification Asset Recognized at the Acquisition Date as a Result of a Government-Assisted Acquisition of a Financial Institution, which clarifies the applicable guidance for subsequently measuring an indemnification asset recognized in a government-assisted acquisition of a financial institution that includes a loss-sharing agreement. The ASU addresses the diversity in practice regarding interpretation of the terms “on the same basis” and “contractual limitations” referred to by the applicable accounting guidance. Accounting principles require that an indemnification asset recognized at the acquisition date as a result of a government-assisted acquisition of a financial institution involving an indemnification agreement shall be subsequently measured on the same basis as the indemnified item. The provisions of ASU No. 2012-06 clarify that, upon subsequent remeasurement of an indemnification asset, the effect of the change in expected cash flows of the indemnification agreement shall be amortized. Any amortization of changes in value is limited to the lesser of the contractual term of the indemnification agreement or the remaining life of the indemnified assets. The ASU also clarifies that the pool level is the appropriate unit of account for determining the life of the indemnified loans. The ASU is to be applied prospectively and does not affect the guidance relating to the recognition or initial measurement of an indemnification asset.

Application of the ASU’s provisions on a disaggregated basis had the effect of reducing the remaining period over which the indemnification assets will be amortized. As a result of the shortened amortization period, and based on current cash flow expectations and other assumptions, the Company’s indemnification asset amortization increased amortization expense for the three- and nine-month periods ended September 30, 2013 by $5,496,000 and $15,916,000, respectively, however the change in amortization period did not have a material impact on its financial position and liquidity. Adoption of the ASU also requires the Company to assess the indemnification assets for collectability on a standalone basis. Prior to adoption, the Company assessed collectability of the indemnification asset and the covered loans on a linked basis. The transition in collectability assessment methodology did not have an impact on the Company’s consolidated financial statements for the three months ended September 30, 2013. However, future changes in cash flow expectations and/or other assumptions could result in indemnification asset impairment.

ASU No. 2013-02

In 2013, the Company adopted the provisions of ASU No. 2013-06, Comprehensive Income (Topic 220): Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income, which requires the Company to report the effect of significant reclassifications out of accumulated other comprehensive income on the respective line items in net income on the Company’s consolidated statements of comprehensive income if the amount being reclassified is required under US GAAP to be reclassified in its entirety to net income. The ASU does not change the current requirements for reporting net income or other comprehensive income in the consolidated financial statements of the Company, but does require the Company to provide information about the amounts reclassified out of accumulated other comprehensive income by component.

The adoption of the ASU affects the format and presentation of the Company’s consolidated financial statements and the footnotes to the consolidated financial statements, but does not represent a departure from accounting principles previously applied and thus the adoption did not have an effect on the Company’s operating results, financial position, or liquidity. The information required to be presented or disclosed by this ASU is incorporated in the Company’s statements of comprehensive income and Note 13 in these unaudited consolidated financial statements.

ASU No. 2011-11 and ASU No. 2013-01

In the first quarter of 2013, the Company adopted the provisions of ASU No. 2011-11, Balance Sheet (Topic 210): Disclosures about Offsetting Assets and Liabilities, which requires an entity to disclose gross and net information about certain instruments and transactions eligible for offset in the statement of financial position and instruments and certain transactions subject to an agreement similar to a master netting arrangement. The Company also adopted ASU No. 2013-01, Balance Sheet (Topic 210): Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities, which clarifies the scope of ASU 2011-11. Because the guidance provided by the ASU’s is disclosure related, adoption resulted in additional disclosures incorporated in Note 12 of these unaudited 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 Three Months Ended September 30						For the Nine Months Ended September 30
(Dollars in thousands, except per share data)	2013			2012			2013			2012
Income available to common shareholders	$	23,192		$	21,234		$	39,499		$	53,187
Distributed earnings to unvested restricted stock		(421	)		(401	)		(744	)		(1,009	)
Distributed earnings to common shareholders - basic		22,771			20,833			38,755			52,178
Undistributed earnings reallocated to unvested restricted stock		(4	)		(5	)		—			2
Distributed and undistributed earnings to common shareholders - diluted	$	22,767		$	20,828		$	38,755		$	52,180
Weighted average shares outstanding - basic (1)		29,631,799			29,066,000			29,582,081			29,303,849
Weighted average shares outstanding - diluted		29,147,232			28,548,432			29,062,238			28,812,631
Earnings per common share - basic	$	0.78		$	0.73		$	1.34		$	1.81
Earnings per common share - diluted		0.78			0.73			1.33			1.81
Earnings per unvested restricted stock share - basic		0.77			0.71			1.33			1.82
Earnings per unvested restricted stock share - diluted		0.78			0.72			1.33			1.82

(1) Weighted average basic shares outstanding include 547,155 and 563,061 shares of unvested restricted stock for the three months ended September 30, 2013 and 2012, respectively, and 559,556 and 554,041 shares for the nine months ended September 30, 2013 and 2012, respectively.

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

	For the Three Months Ended September 30				For the Nine Months Ended September 30
(Dollars in thousands, except per share data)	2013		2012		2013		2012
Distributed earnings to common shareholders	$	9,926	$	9,826	$	29,736	$	29,695
Undistributed earnings to common shareholders		12,845		11,007		9,019		22,483
Total earnings to common shareholders	$	22,771	$	20,833	$	38,755	$	52,178
Distributed earnings to unvested restricted stock	$	183	$	189	$	571	$	574
Undistributed earnings to unvested restricted stock		238		212		173		435
Total earnings allocated to unvested restricted stock	$	421	$	401	$	744	$	1,009
Distributed earnings per common share	$	0.34	$	0.34	$	1.03	$	1.03
Undistributed earnings per common share		0.44		0.39		0.31		0.78
Total earnings per common share - basic	$	0.78	$	0.73	$	1.34	$	1.81
Distributed earnings per unvested restricted stock share	$	0.34	$	0.34	$	1.02	$	1.04
Undistributed earnings per unvested restricted stock share		0.43		0.37		0.31		0.78
Total earnings per unvested restricted stock share - basic	$	0.77	$	0.71	$	1.33	$	1.82

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For the three months ended September 30, 2013 and 2012, the calculations for basic shares outstanding exclude the weighted average shares owned by the Recognition and Retention Plan (“RRP”) of 642,764 and 624,000, respectively, and are adjusted for the weighted average shares in treasury stock of 2,189,978 and 2,036,132, respectively. For the nine months ended September 30, 2013 and 2012, basic shares outstanding exclude 645,793 and 611,646 shares owned by the RRP, respectively, and are adjusted for 2,249,068 and 1,801,572 shares, respectively, of weighted average shares of treasury stock.

The effect from the assumed exercise of 402,344 and 834,559 stock options was not included in the computation of diluted earnings per share for three months ended September 30, 2013 and 2012, respectively, because such amounts would have had an antidilutive effect on earnings per common share. For the nine months ended September 30, 2013 and 2012, the effect from the assumed exercise of 678,604 and 703,346 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 AND DISPOSITION ACTIVITY

Acquisitions

During the third quarter of 2013, the Company announced the signing of a definitive agreement pursuant to which IBERIABANK will acquire certain assets and assume certain liabilities of the Memphis, Tennessee operations of Trust One Bank, a division of Synovus Bank. The transaction is expected to close in the first quarter of 2014 and is subject to customary closing conditions, including receipt of certain regulatory approvals.

Branch Dispositions

During the fourth quarter of 2012, the Company announced plans to close four branches during 2013 as part of its ongoing business strategy, which includes a periodic review of its branch network to maximize shareholder return. The Company closed these four branches during the first quarter of 2013. During the second quarter of 2013, the Company announced plans to close or consolidate ten additional branches. As part of these branch closures, the Company incurred various disposal costs during the three and nine months ended September 30, 2013, including personnel termination costs, contract termination costs, and fixed asset disposals. The following table shows the costs the Company incurred that are included in its statements of comprehensive income for the periods indicated.

	For the Three Months Ended September 30					For the Nine Months Ended September 30
(Dollars in thousands)	2013			2012		2013		2012
Employee termination	$	(70	)	$	384	$	299	$	384
Accelerated depreciation		352			284		1,033		284
Contract termination		591			—		591		—
Impairment		323			2,743		4,941		2,743
	$	1,196		$	3,411	$	6,864	$	3,411

For the three months ended September 30, 2013, employee termination costs include an adjustment to record the difference between estimated severance costs at the end of the second quarter of 2013 and severance paid to employees during the third quarter of 2013. The difference is a result of a reduction in calculated severance payments due to employee acceptance of other opportunities. The Company estimates future exit costs, which would include additional employee termination costs, fixed asset disposals, and lease termination costs, will not be material.

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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, 2013
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	407,049	$	1,878	$	(7,127	)	$	401,800
Obligations of state and political obligations		109,509		2,967		(235	)		112,241
Mortgage-backed securities		1,449,275		14,928		(15,337	)		1,448,866
Other securities		1,460		22		—			1,482
Total securities available for sale	$	1,967,293	$	19,795	$	(22,699	)	$	1,964,389
Securities held to maturity:
U.S. Government-sponsored enterprise obligations	$	34,471	$	650	$	—		$	35,121
Obligations of state and political obligations		84,471		1,735		(1,425	)		84,781
Mortgage-backed securities		36,736		293		(1,621	)		35,408
Total securities held to maturity	$	155,678	$	2,678	$	(3,046	)	$	155,310

	December 31, 2012
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	281,746	$	4,364	$	(386	)	$	285,724
Obligations of state and political obligations		120,680		6,573		(178	)		127,075
Mortgage-backed securities		1,303,030		29,108		(1,482	)		1,330,656
Other securities		1,460		89		—			1,549
Total securities available for sale	$	1,706,916	$	40,134	$	(2,046	)	$	1,745,004
Securities held to maturity:
U.S. Government-sponsored enterprise obligations	$	69,949	$	1,244	$	—		$	71,193
Obligations of state and political obligations		88,909		4,730		(113	)		93,526
Mortgage-backed securities		46,204		728		(153	)		46,779
Total securities held to maturity	$	205,062	$	6,702	$	(266	)	$	211,498

Securities with carrying values of $1.4 billion and $1.7 billion were pledged to secure public deposits and other borrowings at September 30, 2013 and December 31, 2012, 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 and ability 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, 2013
	Less Than Twelve Months					Over Twelve Months					Total
(Dollars in thousands)	Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	(7,127	)	$	274,195	$	—		$	—	$	(7,127	)	$	274,195
Obligations of state and political obligations		(10	)		326		(225	)		1,047		(235	)		1,373
Mortgage-backed securities		(14,096	)		671,684		(1,241	)		38,600		(15,337	)		710,284
Total securities available for sale	$	(21,233	)	$	946,205	$	(1,466	)	$	39,647	$	(22,699	)	$	985,852
Securities held to maturity:
Obligations of state and political obligations	$	(1,308	)	$	28,433	$	(117	)	$	2,080	$	(1,425	)	$	30,513
Mortgage-backed securities		(850	)		15,490		(771	)		9,805		(1,621	)		25,295
Total securities held to maturity	$	(2,158	)	$	43,923	$	(888	)	$	11,885	$	(3,046	)	$	55,808

	December 31, 2012
	Less Than Twelve Months					Over Twelve Months					Total
(Dollars in thousands)	Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	(386	)	$	59,741	$	—		$	—	$	(386	)	$	59,741
Obligations of state and political obligations		—			—		(178	)		1,094		(178	)		1,094
Mortgage-backed securities		(1,473	)		180,027		(9	)		3,919		(1,482	)		183,946
Total securities available for sale	$	(1,859	)	$	239,768	$	(187	)	$	5,013	$	(2,046	)	$	244,781
Securities held to maturity:
Obligations of state and political obligations	$	(113	)	$	8,242	$	—		$	—	$	(113	)	$	8,242
Mortgage-backed securities		(153	)		16,262		—			—		(153	)		16,262
Total securities held to maturity	$	(266	)	$	24,504	$	—		$	—	$	(266	)	$	24,504

The Company assessed the nature of the losses in its portfolio as of September 30, 2013 and December, 31, 2012 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,

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• 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 bond discussed below, in each instance, management has determined the cost basis of the securities would be fully recoverable. Management also has the intent and ability 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, 2013, 151 debt securities had unrealized losses of 2.41% of the securities’ amortized cost basis and 1.21% of the Company’s total amortized cost basis. The unrealized losses for each of the 151 securities relate to market interest rate changes. 13 of the 151 securities have been in a continuous loss position for over twelve months at September 30, 2013. These 13 securities had an aggregate amortized cost basis and unrealized loss of $53,886,000 and $2,354,000, respectively. Ten of the 13 securities were issued by either the Federal National Mortgage Association (Fannie Mae), the Federal Home Loan Mortgage Corporation (Freddie Mac), or the Government National Mortgage Association (Ginnie Mae). The Fannie Mae, Freddie Mac, and Ginnie Mae securities are rated AA+ by S&P and Aaa by Moodys. Three of the securities in a continuous loss position for over twelve months were issued by political subdivisions. One of the bond issuers has a credit rating of A+ by S&P. In addition, the bond is insured by a Aaa rated insurer and as a result, the Company concluded that an other-than-temporary impairment charge was not required at September 30, 2013. The second bond in a continuous unrealized loss position for over twelve months carries an issue rating of Aa2 by Moody’s, and is also insured by the same Aaa rated insurer, and as a result, the Company concluded that an other-than-temporary impairment charge was not required at September 30, 2013. The remaining security in a continuous unrealized loss position for over twelve months was issued by a political subdivision and is discussed in further detail below.

At December 31, 2012, 49 debt securities had unrealized losses of 0.85% of the securities’ amortized cost basis and 0.12% of the Company’s total amortized cost basis. The unrealized losses for each of the 49 securities relate to market interest rate changes. Three of the 49 securities had been in a continuous loss position for over twelve months at December 31, 2012. These three securities had an aggregate amortized cost basis and unrealized loss of $5,200,000 and $187,000, respectively. Two of the three securities were issued by either the Federal National Mortgage Association (Fannie Mae), Federal Home Loan Mortgage Corporation (Freddie Mac), or the Government National Mortgage Association (Ginnie Mae). The Fannie Mae, Freddie Mac, and Ginnie Mae securities are rated AA+ by S&P and Aaa by Moodys. One of the securities in a continuous unrealized loss position for over twelve months was issued by a political subdivision and is discussed in further detail below.

Prior to 2012, management assessed the operating environment of a bond issuer as adverse and concluded that the Company had one unrated revenue municipal bond that warranted an other-than-temporary impairment charge. The specific impairment was related to the loss of the contracted revenue source required for bond repayment. The Company determined the impairment charge using observable market data for similar assets, including third party valuation of the security, as well as information from unobservable inputs, including its best estimate of the recoverability of the amortized cost of the security as outlined above. 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 for the year ended December 31, 2011. The Company recorded total impairment of 50% of the par value of the bond and provided a fair value of the bonds that was consistent with current market pricing. During the first nine months of 2013, the Company continued to analyze the operating environment of the bond as it did in 2012 and 2011 and noted no further deterioration in the operating environment of the bond issuer.

During the nine months ended September 30, 2013 and 2012, 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 other declines in the estimated fair value of the Company’s investment securities were deemed to be other-than-temporary at September 30, 2013 or December 31, 2012.

The amortized cost and estimated fair value of investment securities by maturity at September 30, 2013 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.

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	Securities Available for Sale							Securities Held to Maturity
(Dollars in thousands)	Weighted Average Yield			Amortized Cost		Estimated Fair Value		Weighted Average Yield			Amortized Cost		Estimated Fair Value
Within one year or less		1.99	%	$	16,230	$	16,430		1.85	%	$	24,541	$	24,815
One through five years		1.38			220,047		220,114		3.01			18,071		18,685
After five through ten years		1.98			596,282		597,600		2.60			24,599		25,040
Over ten years		1.92			1,134,734		1,130,245		2.92			88,467		86,770
		1.88	%	$	1,967,293	$	1,964,389		2.71	%	$	155,678	$	155,310

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 September 30					Nine Months Ended September 30
(Dollars in thousands)	2013			2012		2013			2012
Realized gains	$	—		$	41	$	2,369		$	3,758
Realized losses		(3	)		—		(110	)		(15	)
	$	(3	)	$	41	$	2,259		$	3,743

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

Other Equity Securities

The Company included the following securities in “Other assets” on the consolidated balance sheets:

(Dollars in thousands)	September 30 2013		December 31 2012
Federal Home Loan Bank (FHLB) stock	$	12,759	$	16,860
Federal Reserve Bank (FRB) stock		28,098		28,155
Other investments		1,306		1,201
	$	42,163	$	46,216

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NOTE 6 – LOANS RECEIVABLE

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

	September 30, 2013
(Dollars in thousands)	Non-covered loans		Covered loans		Total
Commercial loans:
Real estate	$	3,320,333	$	459,506	$	3,779,839
Business		2,643,822		40,422		2,684,244
		5,964,155		499,928		6,464,083
Residential mortgage loans:
Residential 1-4 family		402,354		153,515		555,869
Construction / Owner Occupied		7,586		—		7,586
		409,940		153,515		563,455
Consumer and other loans:
Home equity		1,131,870		149,144		1,281,014
Indirect automobile		369,755		—		369,755
Other		360,315		4,415		364,730
		1,861,940		153,559		2,015,499
	$	8,236,035	$	807,002	$	9,043,037

	December 31, 2012
(Dollars in thousands)	Non-covered loans		Covered loans		Total
Commercial loans:
Real estate	$	2,990,700	$	640,843	$	3,631,543
Business		2,450,667		87,051		2,537,718
		5,441,367		727,894		6,169,261
Residential mortgage loans:
Residential 1-4 family		284,019		187,164		471,183
Construction / Owner Occupied		6,021		—		6,021
		290,040		187,164		477,204
Consumer and other loans:
Home equity		1,076,913		174,212		1,251,125
Indirect automobile		327,985		—		327,985
Other		269,519		3,486		273,005
		1,674,417		177,698		1,852,115
	$	7,405,824	$	1,092,756	$	8,498,580

In 2009, the Company acquired substantially all of the assets and liabilities of CapitalSouth Bank (“CSB”), and certain assets and assumed certain deposit 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”). 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.

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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” in the information below and loans that are not subject to the loss share agreements as “non-covered loans.”

Deferred loan origination fees were $16,445,000 and $14,040,000 and deferred loan expenses were $7,154,000 and $5,270,000 at September 30, 2013 and December 31, 2012, 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, 2013 and December 31, 2012, overdrafts of $2,319,000 and $3,231,000, respectively, have been reclassified to loans receivable.

Loans with carrying values of $2.2 billion and $1.5 billion were pledged to secure public deposits and other borrowings at September 30, 2013 and December 31, 2012, respectively.

Non-covered Loans

The following tables provide an analysis of the aging of non-covered loans as of September 30, 2013 and December 31, 2012. Because of the difference in accounting for acquired loans, the tables below further segregate the Company’s non-covered loans receivable between loans acquired from Florida Gulf in 2012, as well as those acquired in 2011, 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, 2013
	Non-covered loans excluding acquired loans
	Past Due (1)								Current		Total Non-covered Loans, Net of Unearned Income		Recorded Investment > 90 days and Accruing
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total
Commercial real estate construction	$	—	$	—	$	2,430	$	2,430	$	380,665	$	383,095	$	—
Commercial real estate - other		1,933		—		9,639		11,572		2,556,798		2,568,370		151
Commercial business		1,743		6		14,591		16,340		2,573,065		2,589,405		—
Residential prime		517		2,297		9,326		12,140		261,615		273,755		1,267
Residential subprime		—		—		442		442		115,715		116,157		—
Home equity		1,745		577		7,092		9,414		1,063,257		1,072,671		—
Indirect automobile		1,719		439		1,056		3,214		364,094		367,308		—
Credit card		184		102		425		711		59,225		59,936		—
Other		684		460		255		1,399		287,477		288,876		—
	$	8,525	$	3,881	$	45,256	$	57,662	$	7,661,911	$	7,719,573	$	1,418

⁽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.

17

	December 31, 2012
	Non-covered loans excluding acquired loans
	Past Due(1)										Total Non-covered Loans, Net of Unearned Income		Recorded Investment > 90 days and Accruing
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total		Current
Commercial real estate construction	$	60	$	—	$	5,479	$	5,539	$	288,137	$	293,676	$	—
Commercial real estate - other		3,590		—		23,559		27,149		2,224,495		2,251,644		83
Commercial business		1,430		13		3,687		5,130		2,362,304		2,367,434		329
Residential prime		662		1,156		9,168		10,986		185,843		196,829		801
Residential subprime		—		—		—		—		60,454		60,454		—
Home equity		2,283		796		5,793		8,872		991,766		1,000,638		158
Indirect automobile		1,624		326		868		2,818		320,148		322,966		—
Credit card		130		51		424		605		51,117		51,722		—
Other		566		105		310		981		201,161		202,142		—
	$	10,345	$	2,447	$	49,288	$	62,080	$	6,685,425	$	6,747,505	$	1,371

⁽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, 2013
	Non-covered acquired loans
	Past Due (1)													Total Non-covered Loans, Net of Unearned Income		Recorded Investment > 90 days and Accruing
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total		Current		Discount
Commercial real estate construction	$	97	$	—	$	3,457	$	3,554	$	15,020	$	(1,928	)	$	16,646	$	3,457
Commercial real estate - other		2,240		438		33,484		36,162		367,085		(51,025	)		352,222		33,484
Commercial business		444		246		1,880		2,570		59,949		(8,102	)		54,417		1,880
Residential prime		—		—		226		226		20,388		(586	)		20,028		226
Home equity		1,567		302		4,681		6,550		56,842		(4,193	)		59,199		4,681
Indirect automobile		86		1		102		189		2,258		—			2,447		102
Other		162		185		948		1,295		13,859		(3,651	)		11,503		948
	$	4,596	$	1,172	$	44,778	$	50,546	$	535,401	$	(69,485	)	$	516,462	$	44,778

⁽¹⁾  Past due information includes loans acquired from OMNI, Cameron and Florida Gulf at the gross loan balance, prior to application of discounts.

18

	December 31, 2012
	Non-covered acquired loans
	Past Due (1)													Total Non-covered Loans, Net of Unearned Income		Recorded Investment > 90 days and Accruing
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total		Current		Discount
Commercial real estate construction	$	369	$	—	$	4,067	$	4,436	$	29,098	$	(3,968	)	$	29,566	$	4,067
Commercial real estate - other		5,971		1,572		38,987		46,530		426,339		(57,055	)		415,814		38,987
Commercial business		1,410		524		3,953		5,887		89,490		(12,144	)		83,233		3,953
Residential prime		—		—		779		779		30,663		1,315			32,757		779
Home equity		2,379		382		4,354		7,115		73,658		(4,498	)		76,275		4,354
Indirect automobile		171		4		146		321		4,698		—			5,019		146
Other		202		17		495		714		21,746		(6,805	)		15,655		495
	$	10,502	$	2,499	$	52,781	$	65,782	$	675,692	$	(83,155	)	$	658,319	$	52,781

⁽¹⁾  Past due information includes loans acquired from OMNI, Cameron and Florida Gulf at the gross loan balance, prior to application of discounts.

Nonaccrual Loans

The following table provides the recorded investment of non-covered loans on nonaccrual status at September 30, 2013 and December 31, 2012. Nonaccrual loans in the table exclude acquired loans.

(Dollars in thousands)	September 30, 2013		December 31, 2012
Commercial real estate construction	$	2,430	$	5,479
Commercial real estate - other		9,488		23,475
Commercial business		14,591		3,358
Residential prime		8,501		8,367
Home equity		7,092		5,635
Indirect automobile		1,056		868
Credit card		425		424
Other		255		310
	$	43,838	$	47,916

19

Covered Loans

The carrying amount of the acquired covered loans at September 30, 2013 and December 31, 2012 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, 2013
(Dollars in thousands)	Acquired Impaired Loans		Acquired Performing Loans		Total Covered Loans
Commercial loans:
Real estate	$	23,751	$	435,755	$	459,506
Business		—		40,422		40,422
		23,751		476,177		499,928
Residential mortgage loans:
Residential 1-4 family		28,333		125,182		153,515
Construction / Owner Occupied		—		—		—
		28,333		125,182		153,515
Consumer and other loans:
Home equity		25,195		123,949		149,144
Indirect automobile		—		—		—
Other		1,205		3,210		4,415
		26,400		127,159		153,559
	$	78,484	$	728,518	$	807,002

	December 31, 2012
(Dollars in thousands)	Acquired Impaired Loans		Acquired Performing Loans		Total Covered Loans
Commercial loans:
Real estate	$	167,742	$	473,101	$	640,843
Business		2,757		84,294		87,051
		170,499		557,395		727,894
Residential mortgage loans:
Residential 1-4 family		20,232		166,932		187,164
Construction / Owner Occupied		—		—		—
		20,232		166,932		187,164
Consumer and other loans:
Home equity		22,094		152,118		174,212
Indirect automobile		—		—		—
Other		820		2,666		3,486
		22,914		154,784		177,698
	$	213,645	$	879,111	$	1,092,756

20

ASC 310-30 loans

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

The following is a summary of changes in the accretable yields of acquired loans during the nine months ended September 30, 2013 and 2012.

	September 30, 2013									September 30, 2012
(Dollars in thousands)	Acquired Impaired Loans			Acquired Performing Loans			Total Acquired Loans			Acquired Impaired Loans			Acquired Performing Loans			Total Acquired Loans
Balance at beginning of period	$	76,623		$	279,770		$	356,393		$	83,834		$	386,977		$	470,811
Transfers from nonaccretable difference to accretable yield		6,148			34,480			40,628			1,062			4,245			5,307
Accretion		(13,519	)		(119,193	)		(132,712	)		(21,924	)		(165,247	)		(187,171	)
Changes in expected cash flows not affecting nonaccretable differences (1)		10,561			81,173			91,734			10,964			46,197			57,161
Balance at end of period	$	79,813		$	276,230		$	356,043		$	73,936		$	272,172		$	346,108

(1) Includes changes in cash flows expected to be collected due to the impact of changes in actual or expected timing of liquidation events, loan modifications, changes in interest rates and changes in prepayment assumptions.

Accretable yield during the first nine months of 2013 increased primarily as a result of changes in expected cash flows not impacting the nonaccretable difference, offset by an increase in accretion recognized during the period. Accretable yield during the first nine months of 2012 decreased primarily as a result of the accretion recognized.

Troubled Debt Restructurings

Information about the Company’s TDRs at September 30, 2013 and 2012 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 the loans acquired in the OMNI and Cameron acquisitions completed during 2011 and certain loans acquired from Florida Gulf in 2012. 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 loans and loans acquired from OMNI and Cameron, and certain Florida Gulf loans that would otherwise meet the criteria for classification as a troubled debt restructuring are excluded from the tables below.

	September 30, 2013								September 30, 2012
	Accruing Loans								Accruing Loans
(Dollars in thousands)	Current		Past Due > 30 days		Nonaccrual TDRs		Total TDRs		Current		Past Due > 30 days		Nonaccrual TDRs		Total TDRs
Commercial real estate construction	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Commercial real estate - other		411		—		5,601		6,012		370		264		18,985		19,619
Commercial business		1,056		—		12,610		13,666		19		—		1,884		1,903
Residential prime		—		—		—		—		—		—		—		—
Residential subprime		—		—		—		—		—		—		—		—
Home equity		—		—		263		263		94		—		224		318
Indirect automobile		—		—		—		—		—		—		—		—
Credit card		—		—		—		—		—		—		—		—
Other		—		—		—		—		—		—		—		—
	$	1,467	$	—	$	18,474	$	19,941	$	483	$	264	$	21,093	$	21,840

21

At September 30, 2013, TDRs totaling $19,941,000 included $11,210,000 of TDRs that occurred during the current nine-month period through modification of the original loan terms. Total TDRs of $21,840,000 at September 30, 2012 included $4,391,000 of TDRs that occurred during the nine-month period ended September 30, 2012. The following table provides information on how the TDRs were modified during the periods indicated.

	Nine Months Ended September 30
(Dollars in thousands)	2013		2012
Extended maturities	$	—	$	412
Interest rate adjustment		—		481
Maturity and interest rate adjustment		—		2,389
Movement to or extension of interest-rate only payments		—		939
Forbearance		11,210		170
	$	11,210	$	4,391

Information about the Company’s non-covered TDRs occurring in these periods is presented in the following table.

	September 30, 2013						September 30, 2012
(In thousands, except number of loans)	Number of Loans		Pre-modification Outstanding Recorded Investment		Post-modification Outstanding Recorded Investment (1)		Number of Loans		Pre-modification Outstanding Recorded Investment		Post-modification Outstanding Recorded Investment (1)
Commercial real estate		5	$	12,507	$	12,329		14	$	4,478	$	3,707
Commercial business		—		—		—		1		27		—
Residential prime		—		—		—		—		—		—
Home Equity		—		—		—		1		94		51
Indirect automobile		—		—		—		—		—		—
Credit card		—		—		—		—		—		—
Other		—		—		—		1		—		—
		5	$	12,507	$	12,329		17	$	4,599	$	3,758

(1) Recorded investment includes any allowance for credit losses recorded on the TDRs at the dates indicated.

22

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, 2013				September 30, 2012
(In thousands, except number of loans)	Number of Loans		Recorded Investment		Number of Loans		Recorded Investment
Commercial real estate		45	$	6,012		46	$	19,048
Commercial business		13		12,370		8		1,883
Residential prime		—		—		—		—
Home Equity		1		47		2		275
Indirect automobile		—		—		—		—
Credit card		—		—		—		—
Other		1		—		1		—
		60	$	18,429		57	$	21,206

NOTE 7 – ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY

Change in Methodology

During the nine-month period ended September 30, 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 Office of the Comptroller of Currency’s (“OCC”) 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 credit losses, and to enhance the previous methodology around loss migration.

As part of the modification, the Company’s calculation of its allowance for credit losses incorporates a new loss migration model designed by the Company to improve its estimates of credit losses by:

• Providing a greater degree of segmentation of the Company’s non-covered, non-acquired loan portfolio within its existing homogeneous pools with distinct risk characteristics;

• Improving the application of the Company’s specific historical loss rates to effectively generate estimated incurred loss rates for these various pools of the loan portfolio; and

• Facilitating future loan portfolio stress testing.

The following changes were made from the Company’s previous methodology utilized through the three months ended March 31, 2013:

• Segregation of the RULC noted above;

• Creation of a transition matrix-based model that calculates current incurred loss estimates derived from Company-specific history of risk rating changes and net charge-offs across multiple loan pools in its portfolio; and

• Elimination of the use of published available expected default frequencies (“EDFs”) adjusted for the Company’s experience in estimating losses in the Company’s commercial real estate and business loan portfolios.

The following table presents the effect of the change in methodology on the Company’s unaudited consolidated financial statements as of September 30, 2013.

23

(Dollars in thousands)	Current Methodology		Previous Methodolgy		Difference			Per Share Difference
Selected Data
Allowance for loan losses	$	64,165	$	73,992	$	(9,827	)
Reserve for unfunded lending commitments		11,959		—		11,959
Allowance for credit losses	$	76,124	$	73,992	$	2,132
(Reversal of)Provision for loan losses	$	2,884	$	2,883	$	1		$	(0.00	)
Provision for unfunded lending commitments		2,131		—		2,131			0.05
Total provision for credit losses	$	5,015	$	2,883	$	2,132		$	0.05

Allowance for Credit Losses Activity

A summary of changes in the allowance for credit losses for the covered loan and non-covered loan portfolios is as follows:

	September 30, 2013
	Non-covered loans
(Dollars in thousands)	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 benefit 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
Decrease in FDIC loss share receivable		—			—			(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 at 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

24

	September 30, 2012
	Non-covered loans
	Excluding Acquired Loans			Acquired Loans			Covered Loans			Total
Allowance for loan losses
Balance at beginning of period	$	74,861		$	—		$	118,900		$	193,761
(Reversal of) Provision for loan losses before benefit attributable to FDIC loss share agreements		6,518			5,805			37,268			49,591
Adjustment attributable to FDIC loss share arrangements		—			—			(33,786	)		(33,786	)
Net (reversal of) provision for loan losses		6,518			5,805			3,482			15,805
Increase in FDIC loss share receivable		—			—			33,786			33,786
Transfer of balance to OREO		—			(408	)		(23,769	)		(24,177	)
Loans charged-off		(6,818	)		(179	)		(13,283	)		(20,280	)
Recoveries		2,455			18			19			2,492
Balance at end of period	$	77,016		$	5,236		$	119,135		$	201,387

25

A summary of changes in the allowance for credit losses for non-covered loans, by loan portfolio type, is as follows:

	September 30, 2013
(Dollars in thousands)	Commercial real estate			Commercial business			Mortgage			Consumer			Unallocated		Total
Allowance for loan 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

26

	September 30, 2012
(Dollars in thousands)	Commercial real estate			Commercial business			Mortgage			Consumer			Unallocated		Total
Allowance for credit losses
Balance at beginning of period	$	35,604		$	25,705		$	897		$	12,655		$	—	$	74,861
(Reversal of) Provision for loan losses		4,199			3,851			1,344			2,929			—		12,323
Transfer of balance to OREO		(62	)		—			(337	)		(9	)		—		(408	)
Loans charged off		(1,195	)		(769	)		(759	)		(4,274	)		—		(6,997	)
Recoveries		790			80			30			1,573			—		2,473
Balance at end of period	$	39,336		$	28,867		$	1,175		$	12,874		$	—	$	82,252
Allowance on loans individually evaluated for impairment	$	1,173		$	162		$	163		$	43		$	—	$	1,541
Allowance on loans collectively evaluated for impairment		38,163			28,705			1,012			12,831			—		80,711
Loans, net of unearned income:
Balance at end of period	$	2,879,836		$	2,357,303		$	266,069		$	1,587,488		$	—	$	7,090,696
Balance at end of period individually evaluated for impairment		26,353			1,888			1,703			318			—		30,262
Balance at end of period collectively evaluated for impairment		2,853,483			2,355,415			264,366			1,587,170			—		7,060,434
Balance at end of period acquired with deteriorated credit quality		60,360			3,675			430			5,334			—		69,799

27

A summary of changes in the allowance for credit losses for covered loans, by loan portfolio type, is as follows:

	September 30, 2013
(Dollars in thousands)	Commercial real estate			Commercial business			Mortgage			Consumer			Unallocated		Total
Allowance for loan 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

	September 30, 2012
(Dollars in thousands)	Commercial real estate			Commercial business			Mortgage			Consumer			Unallocated		Total
Allowance for credit losses
Balance at beginning of period	$	69,175		$	9,788		$	21,184		$	18,753		$	—	$	118,900
(Reversal of) Provision for loan losses		3,550			922			(1,387	)		397			—		3,482
(Decrease) Increase in FDIC loss share receivable		24,229			2,398			4,277			2,882			—		33,786
Transfer of balance to OREO		(9,876	)		(2,475	)		(10,593	)		(825	)		—		(23,769	)
Loans charged off		(13,143	)		—			(131	)		(9	)		—		(13,283	)
Recoveries		16			—			—			3			—		19
Balance at end of period	$	73,951		$	10,633		$	13,350		$	21,201		$	—	$	119,135
Allowance on loans individually evaluated for impairment	$	—		$	—		$	—		$	—		$	—	$	—
Allowance on loans collectively evaluated for impairment		73,951			10,633			13,350			21,201			—		119,135
Loans, net of unearned income:
Balance at end of period	$	670,001		$	91,822		$	197,333		$	180,094		$	—	$	1,139,250
Balance at end of period individually evaluated for impairment		—			—			—			—			—		—
Balance at end of period collectively evaluated for impairment		670,001			91,822			197,333			180,094			—		1,139,250
Balance at end of period acquired with deteriorated credit quality		171,965			3,522			22,085			24,388			—		221,960

28

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 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, 2013 and December 31, 2012.

	Non-covered loans excluding acquired loans
	September 30, 2013										December 31, 2012
(Dollars in thousands)	Pass		Special Mention		Substandard		Doubtful		Total		Pass		Special Mention		Substandard		Doubtful		Total
Commercial real estate construction	$	374,458	$	4,800	$	3,837	$	—	$	383,095	$	269,842	$	16,767	$	7,067	$	—	$	293,676
Commercial real estate - other		2,503,820		37,537		26,896		117		2,568,370		2,162,989		40,547		47,710		398		2,251,644
Commercial business		2,546,614		9,013		32,825		953		2,589,405		2,295,788		21,640		49,958		48		2,367,434
Total	$	5,424,892	$	51,350	$	63,558	$	1,070		5,540,870	$	4,728,619	$	78,954	$	104,735	$	446	$	4,912,754

	Non-covered loans excluding acquired loans
	September 30, 2013						December 31, 2012
(Dollars in thousands)	Current		30+ Days Past Due		Total		Current		30+ Days Past Due		Total
Residential prime	$	261,615	$	12,140	$	273,755	$	185,843	$	10,986	$	196,829
Residential subprime		115,715		442		116,157		60,454		—		60,454
Home equity		1,063,257		9,414		1,072,671		991,766		8,872		1,000,638
Indirect automobile		364,094		3,214		367,308		320,148		2,818		322,966
Credit card		59,225		711		59,936		51,117		605		51,722
Consumer - other		287,477		1,399		288,876		201,161		981		202,142
	$	2,151,383	$	27,320	$	2,178,703	$	1,810,489	$	24,262	$	1,834,751

	Non-covered acquired loans
	September 30, 2013													December 31, 2012
(Dollars in thousands)	Pass		Special Mention		Substandard		Doubtful		Discount			Total		Pass		Special Mention		Substandard		Doubtful		Discount			Total
Commercial real estate construction	$	12,900	$	1,321	$	4,353	$	—	$	(1,928	)	$	16,646	$	25,896	$	2,410	$	5,228	$	—	$	(3,968	)	$	29,566
Commercial real estate - other		320,781		18,438		63,816		212		(51,025	)		352,222		359,046		28,185		85,420		218		(57,055	)		415,814
Commercial business		56,465		2,241		3,725		88		(8,102	)		54,417		86,201		2,159		4,808		2,209		(12,144	)		83,233
Total	$	390,146	$	22,000	$	71,894	$	300	$	(61,055	)	$	423,285	$	471,143	$	32,754	$	95,456	$	2,427	$	(73,167	)	$	528,613

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	Non-covered acquired loans
	September 30, 2013									December 31, 2012
(Dollars in thousands)	Current		30+ Days Past Due		Premium (discount)			Total		Current		30+ Days Past Due		Premium (discount)			Total
Residential prime	$	20,388	$	226	$	(586	)	$	20,028	$	30,663	$	779	$	1,315		$	32,757
Home equity		56,842		6,550		(4,193	)		59,199		73,658		7,115		(4,498	)		76,275
Indirect automobile		2,258		189		—			2,447		4,698		321		—			5,019
Consumer - other		13,859		1,295		(3,651	)		11,503		21,746		714		(6,805	)		15,655
	$	93,347	$	8,260	$	(8,430	)	$	93,177	$	130,765	$	8,929	$	(9,988	)	$	129,706

Credit quality information in the table above includes loans acquired at the gross loan balance, prior to the application of discounts, at September 30, 2013 and December 31, 2012.

The Company’s investment in covered loans by credit quality indicator is presented in the following table. Loan discounts in the tables below represent the adjustment of covered loans to fair value at the date, as adjusted for income accretion and changes in cash flow estimates in subsequent periods.

	Covered loans
	September 30, 2013											December 31, 2012
(Dollars in thousands)	Pass		Special Mention		Substandard		Doubtful		Total			Pass		Special Mention		Substandard		Doubtful		Total
Commercial real estate construction	$	44,312	$	8,093	$	42,849	$	497	$	95,751		$	46,201	$	9,888	$	97,315	$	607	$	154,011
Commercial real estate - other		146,103		56,182		194,785		7,496		404,566			201,261		65,498		279,171		8,530		554,460
Commercial business		33,112		958		17,201		1,277		52,548			38,552		8,600		50,018		451		97,621
Total	$	223,527	$	65,233	$	254,835	$	9,270	$	552,865		$	286,014	$	83,986	$	426,504	$	9,588	$	806,092
Discount										(52,937	)										(78,198	)
									$	499,928										$	727,894

	Covered loans
	September 30, 2013									December 31, 2012
(Dollars in thousands)	Current		30+ Days Past Due		Premium (discount)			Total		Current		30+ Days Past Due		Premium (discount)			Total
Residential prime	$	164,214	$	33,114	$	(43,813	)	$	153,515	$	183,795	$	52,379	$	(49,010	)	$	187,164
Home equity		150,302		41,683		(42,841	)		149,144		168,729		65,997		(60,514	)		174,212
Credit card		665		36		—			701		841		65		—			906
Consumer - other		643		204		2,867			3,714		1,154		1,523		(97	)		2,580
	$	315,824	$	75,037	$	(83,787	)	$	307,074	$	354,519	$	119,964	$	(109,621	)	$	364,862

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Impaired Loans

Information on the Company’s investment in impaired loans is presented in the following tables as of and for the periods indicated.

	September 30, 2013							December 31, 2012
(Dollars in thousands)	Recorded Investment		Unpaid Principal Balance		Related Allowance			Recorded Investment		Unpaid Principal Balance		Related Allowance
With no related allowance recorded:
Commercial real estate	$	9,392	$	9,392	$	—		$	26,151	$	26,151	$	—
Commercial business		13,068		13,068		—			1,824		1,824		—
Home equity		263		263		—			—		—		—
With an allowance recorded:
Commercial real estate		2,913		2,937		(24	)		3,464		3,663		(199	)
Commercial business		2,569		2,579		(10	)		1,334		1,810		(476	)
Residential prime		9,575		9,908		(333	)		9,861		10,070		(209	)
Home equity		6,784		6,829		(45	)		5,860		5,951		(91	)
Indirect automobile		1,050		1,056		(6	)		865		868		(3	)
Credit card		417		425		(8	)		413		424		(11	)
Other		252		255		(3	)		307		310		(3	)
	$	46,283	$	46,712	$	(429	)	$	50,079	$	51,071	$	(992	)
Total commercial loans		27,942		27,976		(34	)		32,773		33,448		(675	)
Total mortgage loans		9,575		9,908		(333	)		9,861		10,070		(209	)
Total consumer loans		8,766		8,828		(62	)		7,445		7,553		(108	)

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	For the Three Months Ended September 30								For the Nine Months Ended September 30
	2013				2012				2013				2012
(Dollars in thousands)	Average Recorded Investment		Interest Income Recognized (1)		Average Recorded Investment		Interest Income Recognized (1)		Average Recorded Investment		Interest Income Recognized (1)		Average Recorded Investment		Interest Income Recognized (1)
With no related allowance recorded:
Commercial real estate	$	10,703	$	6	$	27,547	$	15	$	12,787	$	22	$	29,872	$	651
Commercial business		13,218		17		2,451		—		8,608		59		3,387		71
Home Equity		265		—		225		—		287		—		227		—
With an allowance recorded:
Commercial real estate		4,346		—		2,731		8		6,092		5		2,866		22
Commercial business		2,739		—		209		1		2,746		3		215		1
Residential prime		9,650		—		9,248		—		9,380		7		7,439		148
Home equity		7,244		—		6,184		—		7,458		14		6,502		110
Indirect automobile		1,349		—		1,135		—		1,610		22		1,345		20
Credit card		424		—		387		—		426		—		354		—
Other		372		—		585		—		446		4		675		6
	$	50,310	$	23	$	50,702	$	24	$	49,840	$	136	$	52,882	$	1,029
Total commercial loans		31,006		23		32,938		24		30,233		89		36,340		745
Total mortgage loans		9,650		—		9,248		—		9,380		7		7,439		148
Total consumer loans		9,654		—		8,516		—		10,227		40		9,103		136

(1) Interest income recognized on impaired loans represents income recognized before loans were placed on nonaccrual status.

As of September 30, 2013 and December 31, 2012, 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 and assumed certain deposit 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 significant 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 CapitalSouth reimbursable loss period ends during the third quarter of 2014 for all covered assets excluding single family residential loans and during the third quarter of 2019 for single family residential loans. The Century and Orion reimbursable loss periods end during the fourth quarter of 2014 for all covered assets excluding single family residential loans and during the fourth quarter of 2019 for single family residential loans. The Sterling reimbursable loss period ends during the third quarter of 2015 for all covered assets excluding single family residential loans and during the third quarter of 2020 for single family residential loans.

In addition, all loans excluding single family residential loans 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, consistent with the covered loss reimbursement rates in effect during the reimbursable loss periods.

32

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 incurred. Of the three loss share agreements that contain clawback provisions, cumulative losses under two of these agreements have exceeded the cumulative loss floors that would trigger a clawback payment. The loss floor has not yet been attained for the third agreement. However, the sum of the historical and remaining projected losses under the remaining agreement is in excess of the clawback amount stated in that agreement. The Company has recorded a liability of $797,000 at September 30, 2013 to reserve for the amount of consideration due to the FDIC based on cumulative losses to date. 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 receivable

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. Note 1 to these unaudited consolidated financial statements provides additional information regarding the Company’s FDIC loss share receivable accounting policy and basis of presentation.

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

	September 30
(Dollars in thousands)	2013			2012
Balance at beginning of period	$	423,069		$	591,844
Change due to (reversal of) credit loss provision recorded on FDIC covered loans		(58,565	)		33,786
Amortization		(68,707	)		(89,899	)
Submission of reimbursable losses to the FDIC		(44,910	)		(97,511	)
Impairment		(31,813	)		—
Changes due to a change in cash flow assumptions on OREO and other		(14,189	)		(7,053	)
Balance at end of period	$	204,885		$	431,167

FDIC loss share receivables collectability assessment

The Company assesses the FDIC loss share receivables for collectability on a quarterly basis. Note 1 provides a description of the Company’s policy for assessing the FDIC loss share receivables for collectability. Based on the collectability analysis completed for the three months ended September 30, 2013, the Company concluded that the $204.9 million FDIC loss share receivable is fully collectible as of September 30, 2013. See below for discussion of the impairment charge recognized for the three-month period ended March 31, 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 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, the Audit Committee and the Board of Directors concluded that an impairment charge was required under generally accepted accounting principles applicable to the Company and should be recognized in the Company’s unaudited 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 $31,813,000 through a charge to net income.

Generally accepted accounting principles require that the tax effects of unusual or infrequent items, such as impairment of the FDIC loss share receivables, be recognized in the interim period in which they occur. Recognition of the tax effect of the impairment during the three-month period ended March 31, 2013 resulted in an effective tax rate for that period, and subsequent year to date periods in 2013, that is not customary of the Company’s effective tax rate without recognition of this infrequent item.

33

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 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)	2013			2012
Balance at beginning of period	$	267,475		$	153,013
Originations		1,712,557			1,749,121
Sales		(1,871,747	)		(1,691,002	)
Balance at end of period	$	108,285		$	211,132

(Dollars in thousands)	2013			2012
Fair value changes of derivatives and mortgage loans held for sale, net	$	(270	)	$	2,954
Gains on sales		51,709			51,828
Servicing and other income, net		402			336
	$	51,841		$	55,118

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:

	September 30, 2013							December 31, 2012
(Dollars in thousands)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Mortgage servicing rights	$	1,816	$	(543	)	$	1,273	$	1,234	$	(304	)	$	930

NOTE 10 – GOODWILL AND OTHER ACQUIRED INTANGIBLE ASSETS

Goodwill

Changes to the carrying amount of goodwill for the year ended December 31, 2012 and the nine months ended September 30, 2013 are provided in the following table.

(Dollars in thousands)
Balance, December 31, 2011	$	369,811
Goodwill acquired during the year		32,420
Goodwill adjustment to correct an immaterial error		(359	)
Balance, December 31, 2012		401,872
Goodwill acquired during the period		—
Balance, September 30, 2013	$	401,872

The goodwill acquired during the year ended December 31, 2012 was a result of the Florida Gulf acquisition.

The goodwill adjustment in 2012 was a result of the Company’s revised goodwill recorded on its OMNI and Cameron acquisitions. The Company has recorded the adjustment to account for the impact of an immaterial error in accounting for its OMNI and Cameron acquisitions that resulted in a decrease in goodwill of $359,000. The Company revised its valuation of acquired deferred tax assets and property during the first quarter of 2012 as a result of information that existed at the acquisition date but was not available during the prior period. The error was identified in 2012 through the operation of the Company’s internal controls over financial reporting as it related to the Company’s acquisition accounting.

34

The Company performed the required annual goodwill impairment test as of October 1, 2012. The Company’s annual impairment test did not indicate impairment at any of the Company’s reporting units as of the testing date. The Company is in the process of performing its annual goodwill impairment test as of October 1, 2013.

Prior to 2011, the Company recognized goodwill impairment of $9,681,000 at the Company’s LTC subsidiary based on a decrease in operating revenue and income, which resulted in the conclusion that the fair value of LTC may have been reduced below its carrying amount.

Title plant

The Company held title plant assets totaling $6,722,000 at September 30, 2013 and December 31, 2012, respectively. No events or changes in circumstances occurred during 2013 or 2012 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 for the periods indicated:

	September 30, 2013							December 31, 2012
(Dollars in thousands)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Core deposit intangibles	$	45,406	$	(29,659	)	$	15,747	$	45,406	$	(26,284	)	$	19,122
Customer relationship intangible asset		1,348		(579	)		769		1,348		(410	)		938
	$	46,754	$	(30,238	)	$	16,516	$	46,754	$	(26,694	)	$	20,060

NOTE 11 – OTHER REAL ESTATE OWNED

Other real estate owned, segregated into non-covered and covered properties, consists of the following as of the periods indicated.

	September 30, 2013						December 31, 2012
(Dollars in thousands)	Non-covered		Covered		Total		Non-covered		Covered		Total
Real estate owned acquired by foreclosure	$	31,261	$	85,616	$	116,877	$	35,080	$	75,784	$	110,864
Real estate acquired for development or resale		10,518		—		10,518		9,199		—		9,199
Other foreclosed property		109		1,483		1,592		14		1,459		1,473
	$	41,888	$	87,099	$	128,987	$	44,293	$	77,243	$	121,536

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NOTE 12 – DERIVATIVE INSTRUMENTS AND OTHER HEDGING ACTIVITIES

Information pertaining to outstanding derivative instruments is as follows:

	Balance Sheet Location	Asset Derivatives Fair Value				Balance Sheet Location	Liability Derivatives Fair Value
(Dollars in thousands)		September 30, 2013		December 31, 2012			September 30, 2013		December 31, 2012
Derivatives designated as hedging instruments under ASC Topic 815:
Interest rate contracts	Other assets	$	—	$	499	Other liabilities	$	—	$	1,843
Total derivatives designated as hedging instruments under ASC Topic 815		$	—	$	499		$	—	$	1,843
Derivatives not designated as hedging instruments under ASC Topic 815:
Interest rate contracts	Other assets	$	14,312	$	25,940	Other liabilities	$	14,312	$	25,940
Forward sales contracts	Other assets		148		2,774	Other liabilities		5,289		343
Written and purchased options	Other assets		18,009		12,906	Other liabilities		11,920		8,764
Total derivatives not designated as hedging instruments under ASC Topic 815		$	32,469	$	41,620		$	31,521	$	35,047
Total derivatives		$	32,469	$	42,119		$	31,521	$	36,890

	Asset Derivatives Notional Amount				Liability Derivatives Notional Amount
(Dollars in thousands)	September 30, 2013		December 31, 2012		September 30, 2013		December 31, 2012
Derivatives designated as hedging instruments under ASC Topic 815:
Interest rate contracts	$	—	$	35,000	$	—	$	35,000
Total derivatives designated as hedging instruments under ASC Topic 815	$	—	$	35,000	$	—	$	35,000
Derivatives not designated as hedging instruments under ASC Topic 815:
Interest rate contracts	$	376,374	$	374,536	$	376,374	$	374,536
Forward sales contracts		8,218		212,028		253,051		53,269
Written and purchased options		366,585		388,793		196,950		185,885
Total derivatives not designated as hedging instruments under ASC Topic 815	$	751,177	$	975,357	$	826,375	$	613,690
Total derivatives	$	751,177	$	1,010,357	$	826,375	$	648,690

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, 2013 and December 31, 2012, the Company was required to post $5,630,000 and $2,650,000, 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, 2013. 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 agreement to the non-defaulting entity upon an event of default of the counterparty, including bankruptcy, insolvency, or similar proceeding, and (2) provide the non-defaulting entity the right to accelerate, terminate, and close-out on a net basis all transactions under the agreement and to liquidate or set-off collateral promptly upon an event of default of the counterparty. As permitted by generally-accepted accounting principles, 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.

36

	September 30, 2013
	Gross Amounts Presented in the Balance Sheet		Gross Amounts Not Offset in the Balance Sheet					Net
(Dollars in thousands)			Derivatives		Collateral (1)
Derivatives subject to master netting arrangements
Derivative assets
Interest rate contracts designated as hedging instruments	$	—	$	—	$	—		$	—
Interest rate contracts not designated as hedging instruments		14,312		—		—			14,312
Written and purchased options		11,865		—		—			11,865
Total derivative assets subject to master netting arrangements	$	26,177	$	—	$	—		$	26,177
Derivative liabilities
Interest rate contracts designated as hedging instruments	$	—	$	—	$	—		$	—
Interest rate contracts not designated as hedging instruments		14,312		—		(5,658	)		8,654
Total derivative liabilities subject to master netting arrangements	$	14,312	$	—	$	(5,658	)	$	8,654

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

	December 31, 2012
	Gross Amounts Presented in the Balance Sheet		Gross Amounts Not Offset in the Balance Sheet						Net
(Dollars in thousands)			Derivatives			Collateral (1)
Derivatives subject to master netting arrangements
Derivative assets
Interest rate contracts designated as hedging instruments	$	499	$	(499	)	$	—		$	—
Interest rate contracts not designated as hedging instruments		25,940		—			—			25,940
Written and purchased options		8,763		—			—			8,763
Total derivative assets subject to master netting arrangements	$	35,202	$	(499	)	$	—		$	34,703
Derivative liabilities
Interest rate contracts designated as hedging instruments	$	1,843	$	(499	)	$	—		$	1,344
Interest rate contracts not designated as hedging instruments		25,940		—			(13,350	)		12,590
Total derivative liabilities subject to master netting arrangements	$	27,783	$	(499	)	$	(13,350	)	$	13,934

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

During the nine months ended September 30, 2013 and 2012, 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, 2013, the fair value of derivatives that will mature within the next twelve months is $690,000. 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.

37

Information pertaining to the effect of the hedging instruments on the consolidated financial statements is as follows:

	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
(Dollars in thousands)	2013		2012				2013		2012				2013		2012
Derivatives in ASC Topic 815 Cash Flow Hedging Relationships
Interest rate contracts	$	—	$	(2,358	)	Other income (expense)	$	—	$	(408	)	Other income (expense)	$	—	$	—
	$	—	$	(2,358	)		$	—	$	(408	)		$	—	$	—

	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 Nine Months Ended September 30
(Dollars in thousands)	2013		2012				2013			2012				2013		2012
Derivatives in ASC Topic 815 Cash Flow Hedging Relationships
Interest rate contracts	$	—	$	(2,358	)	Other income (expense)	$	(392	)	$	(1,195	)	Other income (expense)	$	—	$	—
	$	—	$	(2,358	)		$	(392	)	$	(1,195	)		$	—	$	—

	Location of Gain (Loss) Recognized in Income on Derivatives		Amount of Gain (Loss) Recognized in Income on Derivatives
			For the Three Months Ended September 30						For the Nine Months Ended September 30
(Dollars in thousands)			2013			2012			2013			2012
Derivatives Not Designated as Hedging Instruments under ASC Topic 815
Interest rate contracts		Other income (expense)	$	2,061			247			2,542			627
Forward sales contracts		Mortgage Income		3,290			(1,887	)		897			(1,887	)
Written and purchased options		Mortgage Income		(7,896	)		3,378			(3,820	)		5,094
			$	(2,545	)	$	1,738		$	(381	)	$	3,834

38

NOTE 13 –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, 2013
(Dollars in thousands)	Before Tax		Tax Expense (Benefit)			Net-of-Tax 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 gains		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

	Three Months Ended September 30, 2012
(Dollars in thousands)	Before Tax			Tax Expense (Benefit)			Net-of-Tax Amount
Unrealized gain on securities:
Unrealized holding gains arising during the period	$	6,099		$	(2,135	)	$	3,964
Less: reclassification adjustment for gains included in net income		(41	)		14			(27	)
Net unrealized gains		6,058			(2,121	)		3,937
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	$	800		$	(280	)	$	520
Less: reclassification adjustment for losses included in net income		409			(142	)		267
Fair value of derivative instruments designated as cash flow hedges		1,209			(422	)		787
Total other comprehensive income	$	7,267		$	(2,543	)	$	4,724

39

	Nine Months Ended September 30, 2013
(Dollars in thousands)	Before Tax			Tax Expense (Benefit)			Net-of-Tax Amount
Unrealized loss 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	)
	Nine Months Ended September 30, 2012
(Dollars in thousands)	Before Tax			Tax Expense (Benefit)			Net-of-Tax Amount
Unrealized gain on securities:
Unrealized holding gains arising during the period	$	8,236		$	(2,883	)	$	5,353
Less: reclassification adjustment for gains included in net income		(3,743	)		1,310			(2,433	)
Net unrealized gains		4,493			(1,573	)		2,920
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	$	(1,882	)	$	659		$	(1,223	)
Less: reclassification adjustment for losses included in net income		1,195			(418	)		777
Fair value of derivative instruments designated as cash flow hedges		(687	)		241			(446	)
Total other comprehensive income	$	3,806		$	(1,332	)	$	2,474

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NOTE 14 – 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, 2013 and 2012, the Company did not have any equity awards that were settled in cash.

Stock option plans

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, 2013, future option or restricted stock awards of 491,346 shares could be made under approved incentive compensation plans.

The following table represents the compensation expense that is included in salaries and employee benefits expense and related income tax benefits in the accompanying consolidated statements of comprehensive income related to stock options.

	For the Three Months Ended September 30				For the Nine Months Ended September 30
(Dollars in thousands, except per share data)	2013		2012		2013		2012
Compensation expense related to stock options	$	526	$	334	$	1,592	$	1,317
Income tax benefit related to stock options		184		117		557		461
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 $495,000 and $940,000 of excess tax benefits as financing cash inflows during the nine months ended September 30, 2013 and 2012, respectively, related to the exercise and vesting of stock options. Net cash proceeds from the exercise of stock options were $5,441,000 and $1,541,000 for the nine months ended September 30, 2013 and 2012, 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:

	2013			2012
Expected dividends		2.6	%		2.3	%
Expected volatility		34.8	%		33.9	%
Risk-free interest rate		1.7	%		2.9	%
Expected term (in years)		8.6			5.8
Weighted-average grant-date fair value	$	15.37		$	13.58

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, 2013, there was $4,485,000 of unrecognized compensation cost related to stock options which is expected to be recognized over a weighted-average period of 4.7 years.

41

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

	Number of shares			Weighted Average Exercise Price		Weighted Average Remaining Contract Life
Oustanding options, December 31, 2011		1,097,620		$	50.14
Granted		226,764			51.73
Issued in connection with acquisition		32,863			41.30
Exercised		(46,729	)		29.42
Forfeited or expired		(29,410	)		57.39
Outstanding options, September 30, 2012		1,281,108		$	50.78		4.8	Years
Outstanding exercisable at September 30, 2012		822,410		$	48.94		3.0	Years
Oustanding 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
Outstanding exercisable at September 30, 2013		749,545		$	52.94		3.2	Years

At September 30, 2013, the aggregate intrinsic value of shares underlying outstanding stock options and underlying exercisable stock options was $2,090,000 and $1,951,000. Total intrinsic value of options exercised was $1,920,000 and $1,046,000 for the nine months ended September 30, 2013 and 2012, respectively.

Restricted stock plans

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, 2013, unearned share-based compensation associated with these awards totaled $23,253,000.

The following table represents the compensation expense that was included in salaries and employee benefits expense in the accompanying consolidated statements of income related to restricted stock grants:

	For the Three Months Ended September 30				For the Nine Months Ended September 30
(Dollars in thousands)	2013		2012		2013		2012
Compensation expense related to restricted stock	$	2,110	$	1,973	$	6,055	$	5,638

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

	2013			2012
Balance at beginning of period		538,202			512,112
Granted		166,223			174,393
Forfeited		(27,483	)		(8,736	)
Earned and issued		(136,629	)		(120,644	)
Balance at end of period		540,313			557,125

Phantom stock awards

As part of the 2008 Incentive Compensation 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 period and the current market price of the Company’s stock.

	For the Three Months Ended September 30				For the Nine Months Ended September 30
(Dollars in thousands)	2013		2012		2013		2012
Compensation expense related to phantom stock	$	792	$	245	$	2,602	$	1,426

The following table represents phantom stock award activity during the periods indicated.

	Number of share equivalents			Dividend equivalents			Total share equivalents			Value of share equivalents (1)
Balance, December 31, 2011		232,921			8,942			241,863		$	11,924,000
Granted		117,506			6,852			124,358			5,696,000
Forfeited share equivalents		(8,052	)		(242	)		(8,294	)		(380,000	)
Vested share equivalents		(16,735	)		(1,144	)		(17,879	)		(894,000	)
Balance, September 30, 2012		325,640			14,408			340,048		$	15,574,000
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

⁽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 $51.91 and $45.80 on September 30, 2013 and 2012, respectively.

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NOTE 15 – 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, 2013, the fair value of guarantees under commercial and standby letters of credit was $1,067,000. 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.

The Company had the following financial instruments outstanding, whose contract amounts represent credit risk:

(Dollars in thousands)	September 30 2013		December 31 2012
Commitments to grant loans	$	342,494	$	192,295
Unfunded commitments under lines of credit		2,972,046		2,372,971
Commercial and standby letters of credit		106,652		62,207
Reserve for unfunded lending commitments		11,959		—

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 it is reasonably possible to incur losses above amounts already accrued associated with legal proceedings between $0.5 million and $2.2 million.

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NOTE 16 – FAIR VALUE MEASUREMENTS

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, 2013
Assets	(Level 1)		(Level 2)		(Level 3)		Total
Available for sale securities	$	15,220	$	1,949,169	$	—	$	1,964,389
Derivative instruments		—		32,469		—		32,469
Total	$	15,220	$	1,981,638	$	—	$	1,996,858
Liabilities
Derivative instruments		—		31,521		—		31,521
Total	$	—	$	31,521	$	—	$	31,521
(Dollars in thousands)	December 31, 2012
Assets	(Level 1)		(Level 2)		(Level 3)		Total
Available for sale securities	$	—	$	1,745,004	$	—	$	1,745,004
Derivative instruments		—		42,119		—		42,119
Total	$	—	$	1,787,123	$	—	$	1,787,123
Liabilities
Derivative instruments		—		36,890		—		36,890
Total	$	—	$	36,890	$	—	$	36,890

During 2013, available for sale securities with a market value of $15,220,000 were purchased and included in the Level 1 fair value measurement category in the table above. The security was issued by Fannie Mae and was included in the Level 1 category at September 30, 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) for the first nine months of 2013 related to assets and liabilities measured at fair value on a recurring basis are reported in noninterest 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)	$	(1,056	)	$	—
Change in unrealized gains (losses) relating to assets still held at September 30, 2013		—			(25,794	)

The Company has segregated all financial assets and liabilities that are measured at fair value on a nonrecurring 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.

45

	September 30, 2013
(Dollars in thousands)	(Level 1)		(Level 2)		(Level 3)		Total
Assets
Loans	$	—	$	1,932	$	—	$	1,932
Mortgage loans held for sale		—		3,213		—		3,213
OREO		—		20,427		—		20,427
Total	$	—	$	25,572	$	—	$	25,572

	December 31, 2012
(Dollars in thousands)	(Level 1)		(Level 2)		(Level 3)		Total
Assets
Loans	$	—	$	6,388	$	—	$	6,388
Mortgage loans held for sale		—		32,753		—		32,753
OREO		—		20,427		—		20,427
Total	$	—	$	59,568	$	—	$	59,568

The tables above exclude the initial measurement of assets and liabilities that were acquired as part of the Florida Gulf, OMNI, Cameron, and Florida Trust Company acquisitions completed in 2012 and 2011. These assets and liabilities were recorded at their fair value upon acquisition in accordance with generally-accepted accounting principles and were not re-measured during the periods presented unless specifically required by generally accepted accounting principles. 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, the Company records 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 $3,024,000 were recorded at their fair value at September 30, 2013. These loans include a reserve of $1,092,000 included in the Company’s allowance for credit losses at September 30, 2013. Impaired non-covered loans with an outstanding balance of $7,269,000 were recorded at their fair value at December 31, 2012. These loans include a reserve of $880,000 included in the Company’s allowance for credit losses at December 31, 2012.

During the second quarter of 2013, the Company announced plans to close ten branches during the second and third quarters of 2013 as part of its business strategy. The Company has notified customers of these branches and has received the required regulatory approvals to proceed with closure. The Company reviewed the carrying amount of the owned properties and concluded it exceeded the fair value of these branches at that date. As a result, the Company recorded an impairment loss in other noninterest expense of $0 in its consolidated statement of comprehensive income for the nine months ended September 30, 2013. After the impairment loss, the carrying value of the branches was $0 and is included in OREO (as real estate acquired for development or resale) on the Company’s consolidated balance sheet at September 30, 2013.

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.

The Company did not record any liabilities at fair value for which measurement of the fair value was made on a nonrecurring basis during the nine months ended September 30, 2013 and 2012.

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. The Company has currently chosen not to elect the fair value option for any items that are not already required to be measured at fair value in accordance with generally accepted accounting principles, and as such has not included any gains or losses in earnings for the nine months ended September 30, 2013 and 2012.

NOTE 17 – 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.

46

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, 2013 and December 31, 2012, weighted for varying maturity dates. Other non-covered loans receivable are valued based on present values using entry-value interest rates at September 30, 2013 and December 31, 2012 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. 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 include 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, 2013 and December 31, 2012 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, 2013 and December 31, 2012, the fair value of guarantees under commercial and standby letters of credit was immaterial.

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The estimated fair values and carrying amounts of the Company’s financial instruments are as follows:

	September 30, 2013				December 31, 2012
(Dollars in thousands)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Financial Assets
Cash and cash equivalents	$	553,447	$	553,447	$	970,977	$	970,977
Investment securities		2,120,067		2,119,699		1,950,066		1,956,502
Loans and loans held for sale		9,151,322		9,257,560		8,766,054		8,800,563
FDIC loss share receivable		204,885		59,512		423,069		207,222
Derivative instruments		32,469		32,469		42,119		42,119
Accrued interest receivable		31,296		31,296		32,183		32,183
Financial Liabilities
Deposits	$	10,950,764	$	10,533,414	$	10,748,277	$	10,594,885
Short-term borrowings		258,850		258,850		303,045		303,045
Long-term debt		281,101		239,506		423,377		394,490
Derivative instruments		31,521		31,521		36,890		36,890
Accrued interest payable		6,026		6,026		6,615		6,615

The fair value estimates presented herein are based upon pertinent information available to management as of September 30, 2013 and December 31, 2012. 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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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, 2013 and updates the Form 10-K for the year ended December 31, 2012. 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, 2013 compared to December 31, 2012 for the balance sheets and the three and nine months ended September 30, 2013 compared to September 30, 2012 for the statements of comprehensive income.

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 “plan”, “believe”, “expect”, “intend”, “anticipate”, “estimate”, “project” or similar expressions. 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 the portfolio into its distinct risks and rewards to the consolidated financial statements. “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 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. IB Aircraft Holdings, LLC owns a fractional share of an 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. is engaged in the purchase of tax credits.

The Company’s focus is that of a high performing institution. Management believes that improvement in core earnings drives shareholder value, and the Company has adopted a mission statement that is designed to provide guidance for our management, associates and Board of Directors regarding the sense of purpose and direction of the Company. We are shareholder- and client-focused, expect high performance from our associates, believe in a strong sense of community and strive to make the Company a great place to work.

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During 2013, the Company continued to execute its business model successfully, as evidenced by solid organic loan growth during the first nine months of 2013, despite the challenges of the current operating environment, which include seasonal headwinds, increased competition, enhanced regulatory scrutiny and continued interest rate pressure. The Company also continued to develop its noninterest revenue streams, particularly from its wealth management and mortgage production subsidiaries. The Company believes it remains well positioned for future growth opportunities, as evidenced by the strength in its liquidity, core funding, and capitalization levels. During the first nine months of 2013, operating results were significantly impacted by three events.

First, the adoption of a new accounting standard, ASU No. 2012-06, reduced the remaining period over which the Company’s indemnification assets will be amortized. As a result of the shortened amortization period, and based on current cash flow expectations and other assumptions, the Company’s indemnification asset amortization increased amortization expense in the three- and nine-month periods ended September 30, 2013 by $5.2 million and $15.6 million, respectively, compared to the methodology in place prior to adoption of ASU 2012-06.

Second, the Company concluded that certain previously expected losses are probable of not being collected from the FDIC. Based on improving economic trends, their impact on the amount and timing of expected future cash flows, and delays in the foreclosure process, these projected losses are no longer anticipated to occur or will occur beyond the reimbursable periods of the loss share agreements with the FDIC. As a result, the Company impaired the indemnification assets by $31.8 million through a charge of that amount to earnings.

Third, as part of its ongoing business strategy that includes a periodic review of its branch network to maximize shareholder return, the Company has closed fifteen branches thus far during 2013, four during the first quarter of 2013, one during the second quarter, and ten during the third quarter of 2013. As part of these branch closures, the Company incurred various disposal costs during the three and nine months ended September 30, 2013, including personnel termination costs, contract termination costs, and fixed asset disposals. Total expenses for these closures were $1.2 million and $6.9 million for the quarter- and year-to-date periods, respectively.

In 2013, the Company continued to experience growth in both income statement and balance sheet metrics. These areas of growth were driven by investments in markets and business lines. Growth was offset, however, by the adoption of ASU No. 2012-06 and the impairment of the FDIC loss share receivables. For the three months ended September 30, 2013 these investments contributed to net interest income growth of $0.7 million, to $97.5 million. For the nine-month period, net interest income grew $5.0 million while non-interest income grew $4.6 million. Non-covered loans grew by $830.2 million, or 11.2% during the first nine months of 2013 to $8.2 billion at September 30, 2013, while covered loans decreased by $285.8 million. The mix of deposits continued a shift to noninterest-bearing, which represented 23.1% of total deposits as of September 30, 2013, up from 18.3% at December 31, 2012. Thus far in 2013, the Company’s liquidity, both on balance sheet and off balance sheet, continued to be favorable, exhibited by liquidity ratios that exceeded peer levels. The Company had cash of $553.4 million at September 30, 2013, 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 considerably in excess of “well capitalized” from a regulatory perspective and above peer levels, and its primary risk measures remained favorable. All of these factors allowed the Company to maintain its strategic positioning within the challenging banking environment and provided a strong base from which to continue to grow its balance sheet and remain positioned to provide currently anticipated increases in shareholder value throughout the rest of 2013.

During 2012, the Company’s mortgage origination and title businesses delivered record years and helped to drive noninterest income growth over 2011. These two businesses continue to perform well thus far in 2013, as mortgage sales volume increased over the nine-month period ended September 30, 2012. Title income was $0.7 million, or 4.5%, higher than in the first nine months of 2012. Additionally, the Company’s investment in the trust and wealth management businesses continue to pay off, as brokerage commissions increased 22.6% over the same period of 2012.

During the first nine months of 2013, noninterest income increased $4.6 million to $130.2 million for the period, a 3.7% increase, as the Company began realizing better returns on its investments as compared to prior years. Noninterest expense also increased. On a basis consistent with generally accepted accounting principles (“GAAP”), noninterest expenses for the nine months ended September 30, 2013 were $370.4 million, $51.7 million higher than the first three quarters of 2012. The largest component of the increase was a $31.8 million impairment of the Company’s FDIC loss share receivables during the first quarter of 2013, noted above. In addition to the impairment, the $6.9 million in branch closure costs noted above also contributed to the increase in non-interest expenses from the prior year. Noninterest expense, excluding the impairment and other non-operating items (“non-GAAP”, see table 1 below) was $326.2 million for the same period, which represented an increase of $18.6 million versus the prior year. The increase in operating noninterest expense was a result of higher employee-related expenses as the Company increased headcount since the third quarter of 2012, mostly from strategic hires to continue growing its business lines. On a GAAP basis, noninterest expense increased due to the factors contributing to the increase in non-GAAP noninterest expense, but was offset by a reduction in merger-related expenses of $3.7 million.

The provision for loan losses decreased $2.0 million in the quarter-to-date period and $15.4 million for the nine-month period ended September 30, 2013 compared to their corresponding 2012 periods, due primarily to an improvement in asset quality in the legacy portfolio over the past 12 months, but also from a reversal of provision to account for expected losses in the acquired loan portfolios.

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All of these factors led net income available to common shareholders for the three months ended September 30, 2013 to increase $2.0 million from the third quarter of 2012 to $0.78 per diluted share. For the first nine months of 2013, income available to common shareholders decreased $0.48 per diluted share. Operating earnings (non-GAAP) for the third quarter of 2013 increased $0.5 million to $24.6 million, or $0.83 on a per share basis, consistent with per share operating earnings from the same period of 2012. On a year-to-date basis, operating earnings increased $8.8 million to $2.26 per diluted share, a $0.28 increase.

Balance Sheet Position and Results of Operations

The Company’s net income available to common shareholders for the third quarter of 2013 totaled $23.2 million, or $0.78 per diluted share, compared to $21.2 million, or $0.73 per diluted share, for the third quarter of 2012. On an operating basis (non-GAAP), per share earnings remained at $0.83 per share. Primary drivers of the increase in operating earnings over the prior year include the earnings from the net assets acquired from Florida Gulf, organic earning asset growth as well as a decrease in nonrecurring noninterest expenses. Key components of the Company’s performance through the third quarter of 2013 are summarized below.

• Total assets at September 30, 2013 were $13.1 billion, up $15.4 million, or 0.1%, from December 31, 2012. Non-covered loan growth of $830.2 million across many of the Company’s markets and additional investment security purchases of $170.0 million drove the increase in total assets. Offsetting these increases were decreases in cash held (which was used primarily to fund earning asset growth), covered assets, and the assets associated with the indemnification agreements with the FDIC. Due to the impairment and amortization of the FDIC loss share receivable, as well as cash receipts from the FDIC, the balance decreased $218.2 million, or 51.6%, since December 31, 2012, and covered loans decreased $285.8 million since 2012.

• Total loans at September 30, 2013 were $9.0 billion, an increase of $544.5 million, or 6.4%, from $8.5 billion at December 31, 2012. As noted above, loan growth during the first nine months of 2013 was driven by an 11.2% increase in non-covered loans. Covered loans decreased 26.1% from December 31, 2012, as covered loans were paid down or charged off and submitted for reimbursement.

• Total customer deposits increased $202.5 million, or 1.9%, to $11.0 billion at September 30, 2013. Noninterest-bearing deposits increased $561.6 million, or 28.5%, but that growth was offset by a decrease of $359.1 million in interest-bearing deposits. The decrease in the Company’s interest-bearing deposits was a result of a $290.1 million, or 13.5%, decrease in time deposits from December 31, 2012. The decline in time deposits was the result of the Company’s effort to prudently align the deposit base with liquidity needs. Interest-bearing demand deposits decreased $69.0 million, or 1.0%. Although deposit competition remained intense, the Company was able to generate growth across its deposit products. Organic deposit growth was driven by growth in the Company’s Birmingham, Alabama, Baton Rouge, Louisiana, and Houston, Texas markets.

• Shareholders’ equity decreased $4.6 million, or 0.3% from year-end 2012. The decrease was driven by a $25.8 million decrease in other comprehensive income, a result of the change in the unrealized gain in the Company’s available for sale investment portfolio due to the decrease in interest rate changes at the end of the second quarter of 2013.

• Net interest income increased $0.7 million, or 0.8%, in the third quarter of 2013 when compared to the same period of 2012. This increase was attributable to a $4.2 million, or 27.4%, decrease in interest expense, but was offset partially by a $3.4 million decrease in interest income. Interest income was positively affected by a $764.4 million increase in average earning assets, due to both the inclusion of Florida Gulf earning assets in the current year and the organic growth in loans since December 31, 2012. The increase in income due to growth in the Company’s earning asset base was offset by a 40 basis point decline in the yield earned on these assets, primarily the result of a 50 basis point decrease in net loan yield. The net loan yield was negatively impacted by a 394 basis point decrease in the covered loan yield, driven by additional amortization on the loss share receivables. Compared to 2012, the Company’s net interest margin ratio on a tax-equivalent basis decreased to 3.37% from 3.58% due to changes in the volume and mix of the Company’s assets and liabilities, the increased amortization of the loss share receivables, and rate decreases driven by federal funds, Treasury, and other Company borrowing rate decreases during 2012 and 2013. Similar trends in average balances and yields were seen in the Company’s year-to-date net interest income when compared to the same period of 2012.

• Noninterest income totaled $43.3 million for the third quarter of 2013, a decrease of 7.1% when compared to the same 2012 period. The decrease was primarily driven by a decrease in the valuation of the Company’s mortgage-related derivatives that negatively impacted mortgage income. However, the Company had a $0.9 million increase in broker commissions, as well as an increase of $0.6 million in service charges that partially offset the mortgage income decrease between the two third quarter periods. Between the nine-month periods of 2013 and 2012, noninterest income increased $4.6 million, or 3.7%, and was the result of higher service charges, brokerage commissions, and income earned on the Company’s derivative transactions.

• Noninterest expense decreased $1.7 million, or 1.5%, when compared to the third quarter of 2012, and was the result of a decrease in merger-related expenses. Results for the third quarter of 2012 included significant expenses incurred as part of the Florida Gulf acquisition. On a year-to-date basis, however, an increase of $51.7 million in total noninterest expense was attributable primarily to higher salary and employee benefit costs of $12.7 million, increased occupancy and equipment and other branch expenses resulting from the Company’s expanded footprint and impairment recorded on the Company’s long-lived assets. These increases were offset by decreases in professional services expense, OREO expenses, and credit-related expenses.

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• During the third quarter and first nine months of 2013, the Company incurred costs associated with previously announced branch closures that affected the Company’s net income and per-share earnings for the three-month and nine-month periods. The Company incurred these costs to improve its long-term operating efficiency, risk-adjusted profitability, and long-term growth prospects. The total cost of these initiatives, $1.2 million and $6.9 million for the three and nine months ended September 30, 2013, respectively, affected total noninterest expense and is discussed in further detail in the “Noninterest expense” section below. On a per-share basis, the branch closure costs, which include fixed asset write-downs, accelerated depreciation, and severance expenses, affected diluted earnings per share for the three-month period ended September 30, 2013 by $0.03. On a year-to-date basis, the branch closure costs reduced diluted earnings per share by $0.15.

• The Company recorded a provision for loan losses of $2.0 million during the third quarter of 2013, $2.1 million lower than the $4.1 million provision recorded in the third quarter of 2012. On a year-to-date basis, the Company’s provision for loan losses was $15.4 million below the same period of 2012. The provision in 2013 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 portfolio. The improvement in asset quality from December 31, 2012 has offset the need for a higher allowance for loan losses as a result of loan growth in 2013. As of September 30, 2013, the allowance for loan losses as a percent of total loans was 1.64%, compared to 2.96% at December 31, 2012.

• The Company paid a quarterly cash dividend of $0.34 per common share in the third quarter of 2013, and $1.02 for the year-to-date period. These amounts were consistent with the dividends paid for the same periods in 2012.

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 of the Company’s performance. Since the presentation of these GAAP performance measures and their impact differ between companies, management believes presentations of these non-GAAP financial measures provide useful supplemental information that is essential to a proper understanding of the operating results of the Company’s core businesses. These non-GAAP disclosures should not be viewed as a substitute for operating results determined in accordance with GAAP, nor are they necessarily comparable to non-GAAP performance measures that may be presented by other companies. Reconciliations of GAAP to non-GAAP disclosures are included in the table below.

TABLE 1 - RECONCILIATIONS OF NON-GAAP FINANCIAL MEASURES

	Three Months Ended September 30
	2013									2012
(Dollars in thousands, except per share amounts)	Pre-tax			After-tax			Per share (1)			Pre-tax			After-tax			Per share (1)
Net income (GAAP)	$	30,549		$	23,192		$	0.78		$	29,378		$	21,234		$	0.73
Merger-related expenses		85			55			0.00			2,985			1,940			0.07
Severance expenses		554			360			0.01			712			463			0.02
Impairment of long-lived assets		977			635			0.02			—			—			—
Provision for FDIC clawback liability		667			434			0.01			—			—			—
Occupancy expenses and branch closure expenses		594			386			0.01			284			185			0.01
Professional expenses and litigation settlement		(630	)		(410	)		(0.01	)		574			373			0.01
(Gain) loss on sale of investments, net		(13	)		(8	)		(0.00	)		(41	)		(27	)		(0.00	)
Operating earnings (non-GAAP)		32,783			24,644			0.83			33,892			24,168			0.83
Covered and acquired (reversal of) provision for loan losses		(854	)		(555	)		(0.02	)		3,827			2,488			0.09
Other (reversal of) provision for loan losses		2,868			1,864			0.07			226			147			0.01
Pre-provision operating earnings (non-GAAP)	$	34,797		$	25,953		$	0.89		$	37,945		$	26,803		$	0.92

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

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	Nine Months Ended September 30
	2013									2012
(Dollars in thousands, except per share amounts)	Pre-tax			After-tax			Per share (1)			Pre-tax			After-tax			Per share (1)
Net income (GAAP)	$	46,193		$	39,499		$	1.33		$	72,854		$	53,187		$	1.81
Merger-related expenses		217			141			0.00			3,940			2,561			0.09
Severance expenses		2,321			1,509			0.05			1,769			1,150			0.04
Impairment of long-lived assets		37,408			24,315			0.82			2,743			1,783			0.06
Provision for FDIC clawback liability		797			518			0.02			—			—			—
Debt prepayment		2,307			1,500			0.05			—			—			—
Occupancy expenses and branch closure expenses		1,276			829			0.03			284			185			0.01
Termination of debit card rewards program		450			293			0.01			—			—			—
Professional expenses and litigation settlement		(480	)		(312	)		(0.01	)		2,456			1,596			0.05
(Gain) loss on sale of investments, net		(2,315	)		(1,505	)		(0.05	)		(3,779	)		(2,456	)		(0.08	)
Operating earnings (non-GAAP)		88,174			66,787			2.26			80,268			58,006			1.98
Covered and acquired (reversal of) provision for loan losses		(2,439	)		(1,585	)		(0.05	)		9,287			6,037			0.20
Other (reversal of) provision for loan losses		2,884			1,875			0.06			6,518			4,237			0.14
Pre-provision operating earnings (non-GAAP)	$	88,619		$	67,077		$	2.27		$	96,073		$	68,280		$	2.32

(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)	2013			2012
Net interest income (GAAP)	$	97,452		$	96,726
Add: Effect of tax benefit on interest income		2,321			2,417
Net interest income (TE) (Non-GAAP)	$	99,773		$	99,143
Noninterest income (GAAP)	$	43,263		$	46,553
Add: Effect of tax benefit on noninterest income		489			493
Noninterest income (TE) (Non-GAAP)	$	43,752		$	47,046
Noninterest expense (GAAP)	$	108,152		$	109,848
Less: Intangible amortization expense		1,179			1,287
Tangible noninterest expense (Non-GAAP)	$	106,973		$	108,561
Net income (GAAP)	$	23,192		$	21,234
Add: Effect of intangible amortization, net of tax		766			837
Cash earnings (Non-GAAP)	$	23,958		$	22,071
Total assets (GAAP)	$	13,145,077		$	12,534,119
Less: Intangible assets		426,385			424,154
Total intangible assets (Non-GAAP)	$	12,718,692		$	12,109,965
Average assets (Non-GAAP)	$	12,944,435		$	12,182,554
Less: Average intangible assets		426,998			409,091
Total average intangible assets (Non-GAAP)	$	12,517,437		$	11,773,463
Total shareholders’ equity (GAAP)	$	1,525,268		$	1,515,154
Less: intangible assets		426,385			424,154
Total tangible shareholders’ equity (Non-GAAP)	$	1,098,883		$	1,091,000
Average shareholders’ equity (Non-GAAP)	$	1,514,155		$	1,519,338
Less: Average intangible assets		426,998			409,091
Average tangible shareholders’ equity (Non-GAAP)	$	1,087,157		$	1,110,247
Net income per common share - diluted	$	0.78		$	0.73
Add: Effect of intangible amortization, net of tax		0.03			0.02
Cash earnings per share - diluted (Non-GAAP)	$	0.81		$	0.75
Return on average common equity		6.08	%		5.56	%
Add: Effect of intangibles		2.66			2.35
Return on average tangible common equity (Non-GAAP)		8.74	%		7.91	%
Efficiency ratio		76.9	%		76.7	%
Less: Effect of tax benefit related to tax-exempt income		(1.5	)		(1.5	)
Efficiency ratio (TE) (Non-GAAP)		75.4			75.2
Less: Effect of amortization of intangibles		(0.9	)		(0.9	)
Tangible efficiency ratio (TE) (Non-GAAP)		74.5	%		74.3	%

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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 $11.7 billion during the third quarter of 2013, a $764.4 million, or 7.0%, increase when compared to the same period of 2012. Earning assets also averaged $11.7 billion during the first nine months of 2013, a $1.1 billion, or 9.9%, increase when compared to the first nine months of 2012. The increase from the prior year was primarily the result of earning assets acquired during 2012 and the Company’s 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 $544.5 million, or 6.4%, to $9.0 billion at September 30, 2013, compared to $8.5 billion at December 31, 2012. The increase was driven by non-covered loan growth of $830.2 million during the first nine months of 2013, but was offset by a decrease in loans covered by loss share agreements with the FDIC of $285.8 million, or 26.1%. By loan type, the increase was primarily from commercial loan growth of $294.8 million and consumer loan growth of $163.4 million during the first nine months of 2013, 4.8% and 8.8% higher, respectively, than at the end of 2012.

The major categories of loans outstanding at September 30, 2013 and December 31, 2012 are presented in the following tables, segregated into covered loans and non-covered loans, including non-covered loans acquired from OMNI, Cameron, and Florida Gulf. The carrying amount of the covered loans and loans acquired from OMNI, Cameron, and Florida Gulf 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 (i.e., loans performing at the time of acquisition) as detailed in the following table.

TABLE 2 – SUMMARY OF LOANS

	September 30, 2013
(Dollars in thousands)	Commercial				Mortgage				Consumer and Other
	Real Estate		Business		1 - 4 Family		Construction		Indirect automobile		Home Equity		Credit Card		Other		Total
Covered loans
Impaired (1)	$	23,751	$	—	$	28,333	$	—	$	—	$	25,195	$	—	$	1,205	$	78,484
Performing (1)		435,755		40,422		125,182		—		—		123,949		701		2,509		728,518
Total covered loans		459,506		40,422		153,515		—		—		149,144		701		3,714		807,002
Non-covered loans
Acquired
Impaired (1)		16,287		45		120		—		31		1,632		—		152		18,267
Performing (1)		352,581		54,372		19,908		—		2,416		57,567		—		11,351		498,195
		368,868		54,417		20,028		—		2,447		59,199		—		11,503		516,462
Legacy loans		2,951,465		2,589,405		382,326		7,586		367,308		1,072,671		59,936		288,876		7,719,573
Total non-covered loans		3,320,333		2,643,822		402,354		7,586		369,755		1,131,870		59,936		300,379		8,236,035
Total	$	3,779,839	$	2,684,244	$	555,869	$	7,586	$	369,755	$	1,281,014	$	60,637	$	304,093	$	9,043,037

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	December 31, 2012
	Commercial				Mortgage				Consumer and Other
	Real Estate		Business		1 - 4 Family		Construction		Indirect automobile		Home Equity		Credit Card		Other		Total
Covered loans
Impaired (1)	$	167,742	$	2,757	$	20,232	$	—	$	—	$	22,094	$	—	$	820	$	213,645
Performing (1)		473,101		84,294		166,932		—		—		152,118		906		1,760		879,111
Total covered loans		640,843		87,051		187,164		—		—		174,212		906		2,580		1,092,756
Non-covered loans
Acquired
Impaired (1)		55,363		3,470		330		—		68		4,649		—		318		64,198
Performing (1)		390,017		79,763		32,427		—		4,951		71,626		—		15,337		594,121
		445,380		83,233		32,757		—		5,019		76,275		—		15,655		658,319
Legacy loans		2,545,320		2,367,434		251,262		6,021		322,966		1,000,638		51,722		202,142		6,747,505
Total non-covered loans		2,990,700		2,450,667		284,019		6,021		327,985		1,076,913		51,722		217,797		7,405,824
Total	$	3,631,543	$	2,537,718	$	471,183	$	6,021	$	327,985	$	1,251,125	$	52,628	$	220,377	$	8,498,580

(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.

The Company’s loan to deposit ratio at September 30, 2013 and December 31, 2012 was 82.6% and 79.1%, respectively. The percentage of fixed rate loans to total loans increased slightly from 50.7% at the end of 2012 to 51.5% as of September 30, 2013. The table below sets forth the composition of the Company’s loan portfolio as of the dates indicated, followed by a discussion of activity by major loan type.

TABLE 3 - TOTAL LOANS BY LOAN TYPE

(Dollars in thousands)	September 30, 2013				December 31, 2012
Commercial loans:
Real estate	$	3,779,839	42	%	$	3,631,543	43	%
Business		2,684,244	30			2,537,718	30
		6,464,083	72			6,169,261	73
Mortgage loans:
Residential 1-4 family		555,869	6			471,183	5
Construction/owner-occupied		7,586	—			6,021	—
		563,455	6			477,204	5
Consumer loans:
Home equity		1,281,014	14			1,251,125	15
Indirect automobile		369,755	4			327,985	4
Other		364,730	4			273,005	3
		2,015,499	22			1,852,115	22
	$	9,043,037	100	%	$	8,498,580	100	%

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Commercial Loans

Commercial real estate and commercial business loans generally have shorter repayment periods and more frequent repricing opportunities than consumer and mortgage loans. Total commercial loans increased $294.8 million, or 4.8%, during the first nine months of 2013, with $522.8 million in non-covered loan growth and a decrease in covered commercial loans of $228.0 million, or 31.3%. The Company continued to attract and retain commercial customers in 2013 as commercial loans were 72% of the total loan portfolio at September 30, 2013. Unfunded commitments on commercial loans were $2.4 billion at September 30, 2013, an increase of $641.5 million when compared to the prior year.

The Company’s investment in commercial real estate loans increased by $148.3 million during the first nine months of 2013, as growth was driven by an increase in non-covered commercial real estate loans of $329.6 million, or 11.0%. At September 30, 2013, commercial real estate loans totaled $3.8 billion, or 41.8% of the total loan portfolio, compared to 42.7% at December 31, 2012. 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, 2013, commercial business loans totaled $2.7 billion, or 29.7% of the Company’s total loan portfolio. This represents a $146.5 million, or 5.8%, increase from December 31, 2012, and was the result of the Company’s focused efforts to grow its small business loan portfolio. 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.

Non-covered commercial loans increased $522.8 million, or 9.6%, during the first nine months of 2013. The Houston, Texas and Baton Rouge, Louisiana markets experienced the largest growth in their commercial loan portfolios, but that growth was partially offset by a decrease in balances in some of the Company’s other markets, the result primarily of payments on existing loans. On a market basis, growth in the non-covered portfolio was driven by the Company’s Houston, Texas market, which grew its commercial loan portfolio $270.2 million, or 31.5%, since the end of 2012. Birmingham, Alabama’s commercial loans grew $21.8 million, or 6.9%, while the Huntsville, Alabama market contributed loan growth of $31.3 million since December 31, 2012. In the Company’s more mature markets, Baton Rouge, Louisiana’s commercial loans grew $53.7 million, or 10.4%, during the first nine months of 2013.

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 which permit their sale in the secondary market. Larger mortgage loans of private banking clients and prospects are generally retained to enhance relationships, and also due to the expected shorter durations and relatively lower servicing costs associated with loans of this size. The Company does not originate or hold high loan to value, negative amortization, option ARM, or other exotic mortgage loans in its portfolio. Beginning in the third quarter of 2012, the Company began to invest in loans that would be considered subprime (e.g., loans with a FICO score of less than 620) in order to ensure compliance with relevant regulations. The Company expects to continue to invest in subprime loans through additional secondary market purchases, as well as direct originations, throughout 2013, albeit up to a limited amount. The total amount of subprime loans purchased or originated in the first nine months of 2013 was $46.8 million, of which $19.0 million is either directly or indirectly guaranteed by a United States Government Agency. At September 30, 2013, the Company had $116.2 million in subprime mortgage loans.

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 rather than assume the interest rate risk associated with these longer term assets. Upon the sale, the Company retains servicing on a limited portion of these loans. Total residential mortgage loans increased $86.3 million, or 18.1% compared to December 31, 2012, and was the result of the subprime loans the Company purchased from the secondary market during the first three quarters of 2013. Offsetting these purchases were decreases in the Company’s covered mortgage loans of $33.6 million and $12.7 million in acquired mortgage loans 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 such loans in its primary market areas. At September 30, 2013, $2.0 billion, or 22.3%, of the total loan portfolio was comprised of consumer loans, compared to $1.9 billion, or 21.8%, at the end of 2012. Total consumer loans increased $163.4 million from December 31, 2012, with 56.1% of the growth ($91.7 million) from personal loans (including credit card loans), with the remaining growth split between indirect automobile loans ($41.8 million) and home equity loans and lines of credit ($29.9 million).

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Consistent with 2012, home equity loans comprised the largest component of the Company’s consumer loan portfolio at September 30, 2013. The balance of home equity loans increased $29.9 million during the first nine months of 2013 to $1.3 billion at September 30, 2013. Non-covered home equity loans increased $55.0 million during the first nine months of 2013 as a result of the Company’s continued focus on expanding its total consumer portfolio through its additional investment in its consumer business, as well as increased activity from its existing clients. The Company’s sales and marketing efforts in 2013 have also contributed to the growth in non-covered home equity loans since December 31, 2012. Unfunded commitments related to home equity loans and lines were $492.9 million at September 30, 2013, an increase of $151.6 million versus the prior year. The Company has approximately $420.5 million of loans with junior liens where the Company does not hold or service the respective loan holding senior lien. The Company believes it has addressed the risks associated with these loans in its allowance for credit losses.

Indirect automobile loans comprised the second largest component of the Company’s consumer loan portfolio. Independent automobile dealerships originate these loans based upon the Company’s credit decisioning. The Company relies on the dealerships, in part, for loan qualifying information. To that extent, there is risk inherent in indirect automobile loans 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 we serve and through long-term relationships with the Company. Indirect automobile loans increased 12.7% during the first three quarters of 2013, from $328.0 million at December 31, 2012 to $369.8 million, or 4.1% of the total loan portfolio, as the Company retained its focus on prime or low risk paper. The organic growth in the Company’s indirect automobile portfolio can be attributed to a couple of primary factors. In 2012, the Company began to sign new dealers after limiting new business during the previous years due to a weakened economy. In addition, the Company has adjusted its interest rates on these loans to be more aligned with its competitors, which has provided the Company an opportunity to recapture some market share.

The Company’s credit card loans totaled $60.6 million at September 30, 2013, a 15.2% increase from December 31, 2012. The increase in credit card loans was the result of an increase in usage by customers at the end of the third quarter. Quarter-to-date average credit card balances have increased from $50.1 million in the fourth quarter of 2012 to $56.6 million in the third quarter of 2013.

The remainder of the consumer loan portfolio at September 30, 2013 consisted of direct automobile loans and other personal loans, and comprised 4.0% of the overall loan portfolio. At the end of the third quarter, the Company’s direct automobile loans totaled $87.3 million, a $27.1 million increase over December 31, 2012, and the Company’s other personal consumer loans were $213.0 million, a 33.0% increase from December 31, 2012, primarily a result of installment loans and personal lines of credit.

Mortgage Loans Held for Sale

Loans held for sale decreased $159.2 million, or 59.5%, to $108.3 million at September 30, 2013 compared to $267.5 million at December 31, 2012. The decrease in the balance during 2013 was a result of an increase in sales activity during the first nine months and a seasonal slowdown of origination and refinance activities. During the first nine months of 2013, the Company has originated $1.7 billion in mortgage loans, offset by sales of $1.9 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, 2013, the Company had $5.4 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 $2.6 million for potential repurchases at September 30, 2013; however, an insignificant number of loans have been returned to the Company.

Asset Quality

The Company’s loan portfolio has gradually transitioned from that of a thrift to resemble portfolios held by commercial banks. This transition brings the potential for increased risks in the form of potentially higher levels of charge-offs and nonperforming assets, and increased rewards in the form of potentially increased levels of shareholder returns. As the risks within the loan portfolio have evolved, management has responded by tightening underwriting guidelines and procedures, implementing more conservative loan charge-off and nonaccrual guidelines, revising loan policies and developing an internal loan review function. As a result of management’s enhancements to underwriting loan risk/return dynamics, the credit quality of the loan portfolio has remained favorable when compared to peers. Management believes that it has demonstrated proficiency in managing credit risk through timely identification of significant problem loans, prompt corrective action, and transparent disclosure. Overall asset quality improved during the first nine months of 2013, primarily as a result of decreases in the number and amount of past due loans and nonperforming assets. Consistent with prior years, the assets and liabilities purchased and assumed through the Company’s four failed bank acquisitions continue to have a disproportionate impact on overall asset quality. The Company continues to closely monitor the risk-adjusted level of return within the loan portfolio.

Written underwriting standards established by 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.

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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 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, classify 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 deficiencies are not corrected. Doubtful assets have the weaknesses of substandard assets with the additional characteristic that the weaknesses make collection or liquidation in full 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 at least monthly. Loans are placed on nonaccrual status when they are 90 days or more past due unless, in the judgment of management, the probability of timely collection of interest is deemed to be sufficient to warrant further accrual. When a loan is placed on nonaccrual status, the accrual of interest income ceases and accrued but unpaid interest attributable to the current year is reversed against interest income. Accrued interest receivable attributable to the prior year is recorded as a charge-off to the allowance for credit losses.

Real estate acquired by the Company through foreclosure or by deed-in-lieu of foreclosure is classified as 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.

Under generally accepted accounting principles, 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.

Nonperforming Assets

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

Loans acquired through failed bank acquisitions, referred to as covered loans, are covered by loss sharing agreements with the FDIC, whereby the FDIC reimburses the Company for the majority of the losses incurred during the loss share claim period. 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 with individual loans was reflected in the acquisition date fair value through the reduction of cash flows expected to be received over the life of loans. A provision for credit losses is recognized and an allowance for credit losses is recorded subsequent to acquisition to the extent that re-estimated expected losses exceed losses estimated at acquisition. Purchased impaired loans were considered to be performing as of the acquisition date regardless of their past due status based on their contractual terms. In accordance with regulatory reporting guidelines, purchased impaired loans that are contractually past due are reported as past due and accruing based on the number of days past due.

Due to the significant difference in accounting for covered loans and the related FDIC loss sharing agreements, as well as non-covered acquired loans accounted for as purchased impaired loans, and given the significant amount of acquired impaired loans that are past due but still accruing, the Company believes inclusion of these loans in certain asset quality ratios that reflect nonperforming assets in the numerator or denominator (or both) results in significant distortion to these ratios. In addition, because loan level charge-offs related to purchased impaired loans are not recognized in the financial statements until the cumulative amounts exceed the original loss projections on a pool basis, the net charge-off ratio for acquired loans is not consistent with the net charge-off ratio for other loan portfolios. The

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inclusion of these loans in certain asset quality ratios could result in a lack of comparability across quarters or years, and could impact comparability with other portfolios that were not impacted by purchased impaired loan accounting. The Company believes that the presentation of certain asset quality measures excluding either covered loans or all purchased impaired loans, as indicated below, and related amounts from both the numerator and denominator provides better perspective into underlying trends related to the quality of its loan portfolio. Accordingly, the asset quality measures in the tables below present asset quality information excluding either covered loans or all purchased impaired loans, as indicated within each table, and related amounts.

Nonperforming assets excluding acquired loans increased $0.2 million, or 0.3%, compared to December 31, 2012. The increase resulted from a $4.2 million increase in OREO, but was offset by a $4.0 million decrease in nonaccrual loans. Including TDRs that are in compliance with their modified terms, total nonperforming assets and TDRs decreased $0.7 million over the past nine months.

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The following table sets forth the composition of the Company’s non-covered nonperforming assets, including accruing loans past due 90 or more days and TDRs.

TABLE 4 - NONPERFORMING ASSETS AND TROUBLED DEBT RESTRUCTURINGS (EXCLUDING ACQUIRED LOANS)

(Dollars in thousands)	September 30, 2013			December 31, 2012			Increase (Decrease)
Nonaccrual loans:
Commercial and business banking	$	26,509		$	32,312		$	(5,803	)	(18.0	)%
Mortgage		8,501			8,367			134		1.6
Consumer and credit card		8,828			7,237			1,591		22.0
Total nonaccrual loans		43,838			47,916			(4,078	)	(8.5	)
Accruing loans 90 days or more past due		1,418			1,371			47		3.4
Total nonperforming loans (1)		45,256			49,287			(4,031	)	(8.2	)
OREO and foreclosed property (2)		30,607			26,380			4,227		16.0
Total nonperforming assets (1)		75,863			75,667			196		0.3
Troubled debt restructuring in compliance with modified terms		1,467			2,354			(887	)	(37.7	)
Total nonperforming assets and troubled debt restructurings (1)	$	77,330		$	78,021		$	(691	)	(0.9	)%
Nonperforming loans to total loans (1) (4)		0.59	%		0.73	%
Nonperforming assets to total assets (1) (4)		0.66	%		0.69	%
Nonperforming assets and troubled debt restructurings to total assets (1) (4)		0.67	%		0.71	%
Allowance for credit losses to nonperforming loans (4) (5)		168.21	%		150.57	%
Allowance for credit losses to total loans (4) (5)		0.99	%		1.09	%

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

(2) OREO and foreclosed property at September 30, 2013 and December 31, 2012 include $10,518,000 and $9,199,000, respectively, of former bank properties held for development or resale.

(3) Troubled debt restructurings in compliance with modified terms for September 30, 2013 and December 31, 2012 do not include $18,474,000 and $15,356,000 in troubled debt restructurings included in total nonaccrual loans above.

(4) Total loans, total nonperforming 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.

Nonperforming loans were 0.59% of total legacy loans at September 30, 2013, 14 basis points lower than at December 31, 2012. If covered loans and acquired loans accounted for in pools that meet nonperforming criteria are included, nonperforming loans were 3.81% of total loans at September 30, 2013 and 6.42% at December 31, 2012. The allowance for credit losses as a percentage of nonperforming loans was 168.2% at September 30, 2013 and 150.6% at December 31, 2012. Including covered loans and pooled loans, the allowance coverage of total loans was 1.77% at September 30, 2013 and 2.96% at December 31, 2012.

Nonperforming asset balances as a percentage of total assets have remained at relatively low levels. Total nonperforming assets were 0.66% of non-covered, non-acquired assets at September 30, 2013, three basis points below December 31, 2012. Consistent with the overall improvement in asset quality, the Company’s reserve for credit losses as a percentage of loans, excluding reserves for acquired loans, decreased 10 basis points from year-end to 0.99% at September 30, 2013.

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Loans defined as TDRs not included in nonperforming assets decreased to $1.5 million at the end of the third quarter of 2013. Total TDRs not covered by loss share agreements totaled $19.9 million at September 30, 2013, $2.2 million, or 12.6%, higher than December 31, 2012. One shared national credit totaling $11.2 million was added to TDRs during 2013, but this addition was offset by loan payments and charge-offs during the first nine months of the current year.

The Company had gross charge-offs on non-acquired loans of $7.5 million during the nine months ended September 30, 2013. Offsetting these charge-offs were recoveries of $4.4 million. As a result, net charge-offs on non-covered loans during the first nine months of 2013 were $3.1 million, or 0.05% of average loans, as compared to net charge-offs of $4.5 million, or 0.09%, for the same period of 2012.

At September 30, 2013, excluding loans covered by the FDIC loss share agreements (see “Covered Loans” below), the Company had $161.0 million of assets classified as substandard, $1.4 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 1.24% of total assets, 1.80% of total loans, and 1.97% of non-covered loans. At December 31, 2012, classified assets totaled $231.6 million, or 1.98% of total assets, 2.72% of total loans, and 3.13% of non-covered loans. The decrease in classified assets is consistent with the overall improvement in asset quality since December 31, 2012. As with non-classified assets, a reserve for credit losses has been recorded for all substandard loans at September 30, 2013 according to the Company’s allowance policy.

In addition to the problem loans described above, excluding covered loans, there were $81.2 million of loans classified as special mention at September 30, 2013, 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 and which may result in future disclosure of these loans as nonperforming. Special mention loans decreased $40.9 million, or 33.5%, from December 31, 2012, which is consistent with the general improvement in the Company’s asset quality.

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, 2013, total past due loans excluding covered loans were 1.30% of total loans, a decrease of 41 basis points from December 31, 2012. Including covered loans, loans past due 30 days or more were 4.10% of total loans before discount adjustments at September 30, 2013 and 6.76% at December 31, 2012. Past due non-covered loans (including nonaccrual loans) decreased $19.7 million, or 15.4%, from December 31, 2012, and can be attributed to improvements in loans past due less than 60 days. Additional information on non-covered past due loans is presented in the following table.

TABLE 5 - PAST DUE NON-COVERED LOAN SEGREGATION

	September 30, 2013
	Non-acquired					Acquired					Total
(Dollars in thousands)	Amount		% of Outstanding Balance			Amount		% of Outstanding Balance			Amount		% of Outstanding Balance
Accruing loans:
30-59 days past due	$	8,526		0.11	%	$	4,596		0.78	%	$	13,122		0.16	%
60-89 days past due		3,881		0.05			1,172		0.20			5,053		0.06
90-119 days past due		499		0.01			2,033		0.35			2,532		0.03
120 days past due or more		918		0.01			203		0.03			1,121		0.01
		13,824		0.18			8,004		1.37			21,828		0.26
Nonaccrual loans (1)		43,838		0.57			42,542		7.26			86,380		1.04
	$	57,662		0.75	%	$	50,546		8.63	%	$	108,208		1.30	%

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	December 31, 2012
	Non-acquired					Acquired					Total
(Dollars in thousands)	Amount		% of Outstanding Balance			Amount		% of Outstanding Balance			Amount		% of Outstanding Balance
Accruing loans:
30-59 days past due	$	10,345		0.15	%	$	10,502		1.42	%	$	20,847		0.28	%
60-89 days past due		2,447		0.04			2,499		0.34			4,946		0.07
90-119 days past due		489		0.01			82		0.01			571		0.01
120 days past due or more		883		0.01			323		0.04			1,206		0.02
		14,164		0.21			13,406		1.81			27,570		0.37
Nonaccrual loans (1)		47,916		0.71			52,376		7.06			100,292		1.34
	$	62,080		0.92	%	$	65,782		8.87	%	$	127,862		1.71	%

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

The $19.7 million decrease in non-covered past due loans was the result of a $5.8 million decrease in accruing loans past due and a $13.9 million decrease in nonaccrual loans. Commercial nonaccrual loans decreased $15.8 million, or 20.0%, and mortgage nonaccrual loans decreased $0.4 million, while consumer nonaccrual loans increased $2.3 million, or 19.0%, since December 31, 2012. The increase in consumer nonaccrual loans was a result of the placement of past due consumer loans on nonaccrual status during 2013 in response to their continued past due status. The movement of these loans to nonaccrual status in the current year helped to drive the decrease in accruing consumer loans past due to $8.2 million at September 30, 2013, from $9.2 million at December 31, 2012, a 10.7% decrease.

In the non-covered commercial loan portfolio, total accruing loans past due decreased $6.2 million, or 39.5%, from December 31, 2012. Total non-covered mortgage loans past due increased $1.5 million during the first nine months of 2013, with 69.0% due less than 90 days and 12.7% past due less than 60 days. At December 31, 2012, those percentages were 69.4% and 25.3%, respectively. Management is continually monitoring the past due status of these mortgage loans for indicators of overall asset quality issues.

Covered Loans

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

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

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

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TABLE 6 – PAST DUE COVERED LOAN SEGREGATION

	September 30, 2013					December 31, 2012
(Dollars in thousands)	Amount		% of Outstanding Balance			Amount		% of Outstanding Balance
Accruing loans:
30-59 days past due	$	6,047		0.64	%	$	14,799		1.16	%
60-89 days past due		2,223		0.24			7,303		0.57
90-119 days past due		7,191		0.76			2,376		0.18
120 days past due or more		—		—			252		0.02
Total accruing loans		15,461		1.64			24,730		1.93
Nonaccrual loans (1)		255,311		27.05			440,575		34.40
Total past due loans	$	270,772		28.69	%	$	465,305		36.33	%

(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, 2013 totaled $270.8 million before discounts, a decrease of $194.5 million, or 41.8%, from December 31, 2012. 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 2013 included $255.3 million in loans that would otherwise meet the Company’s definition of nonaccrual loans and $15.5 million in accruing loans past due greater than 30 days. Of the $15.5 million in accruing loans past due, $8.3 million, or 53.5%, were past due less than 90 days. The indemnification agreements on covered assets include a provision for recapture of a portion of interest if the interest is included in total losses on the covered asset.

Of the $194.5 million decrease in covered loans past due, loans past due 30 to 89 days decreased $13.8 million, or 62.6%, while nonperforming loans (defined as accruing loans greater than 90 days past due and loans that meet the definition of nonaccrual loans) decreased $180.7 million, or 40.8%. These decreases were primarily a result of loan payments during the current year.

Of the $894.1 million in covered assets at September 30, 2013, $80.7 million will lose loss share coverage within the next 12 months. The following table provides additional information 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 5 above as part of the non-covered acquired loans.

TABLE 7 – COVERED ASSETS BY LOSS SHARE COVERAGE PERIOD

	Covered Assets
	Continued Loss Share Coverage beyond next 12 months			Losing Loss Share Coverage within next 12 months
(Dollars in thousands)
Loans, net	$	731,225		$	75,777
Other Real Estate Owned		82,137			4,962
Allowance for Loan Losses		(65,596	)		(13,455	)
Nonaccrual loans	$	225,252		$	30,059
Foreclosed assets		1,483			—
Other real estate owned		80,654			4,962
Accruing Loans More Than 90 Days Past Due		7,191			—
Nonperforming Assets		314,580			35,021
Total Past Due Loans	$	221,925		$	48,847
Nonperforming Assets/Assets		28.94	%		43.38	%
NPAs/(Loans + OREO)		38.68	%		43.38	%
(Past Dues & Nonaccruals)/Loans		30.35	%		64.46	%

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Allowance for Credit Losses

The allowance for credit losses represents management’s best estimate of probable credit losses inherent at the balance sheet date. Determination of the allowance for credit losses involves a high degree of complexity and requires significant judgment. Several factors are taken into consideration in the determination of the overall allowance for credit losses, including a qualitative component. These factors include, but are not limited to, the overall risk profiles of the loan portfolios, net charge-off experience, the extent of impaired loans, the level of nonaccrual loans, the level of 90 days past due loans and the overall percentage level of the allowance. The Company also considers overall asset quality trends, changes in lending and risk management practices and procedures, trends in the nature and volume of the loan portfolio, including the existence and effect of any portfolio concentrations, changes in experience and depth of lending staff, 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 for the year ended December 31, 2012 for more information.

Change in Methodology

During the three months ended June 30, 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 credit losses, into a separate liability on the Company’s consolidated balance sheet, and to enhance the previous methodology around loss migration.

As part of the modification, the Company’s calculation of its allowance for credit losses incorporates a new loss migration model designed by the Company to improve its estimates of credit losses by:

• Providing a greater degree of segmentation of the Company’s non-covered, non-acquired loan portfolio within its existing homogeneous pools with distinct risk characteristics;

• Improving the application of the Company’s specific historical loss rates to effectively generate estimated incurred loss rates for these various pools of the loan portfolio; and

• Facilitating future loan portfolio stress testing.

The following changes were made from the Company’s previous methodology utilized through the three months ended March 31, 2013:

• Segregation of the RULC noted above;

• Creation of a transition matrix-based model that calculates current incurred loss estimates derived from Company-specific history of risk rating changes and net charge-offs across multiple loan pools in its portfolio; and

• Elimination of the use of published available expected default frequencies (“EDFs”) adjusted for the Company’s experience in estimating losses in the Company’s commercial real estate and business loan portfolios.

As a result of the change in methodology, at September 30, 2013, the Company’s allowance for loan losses was $9.8 million lower than it would have been under the previous methodology. However, offsetting the decrease was a $12.0 million increase in the Company’s RULC, included in other liabilities in its unaudited consolidated balance sheet. The Company’s allowance for credit losses, therefore, was $2.1 million higher than what it would have been under the previous methodology at September 30, 2013.

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. See the “Application of Critical Accounting Policies and Estimates” section of the Company’s Annual Report on Form 10-K filed with the SEC for the year ended December 31, 2012 for more information.

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Acquired Loans

Acquired loans, which include covered loans and certain non-covered loans, represent loans acquired by the Company that are accounted for in accordance with ASC 310-30. See discussion above, as well as the “Application of Critical Accounting Policies and Estimates” section of the Company’s Annual Report on Form 10-K filed with the SEC for the year ended December 31, 2012 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, 2013, the Company had an allowance for credit losses of $79.1 million to reserve for probable losses currently in the covered loan portfolio and $5.3 million to reserve for probable losses currently in the acquired loan portfolio that have arisen after the losses estimated at the respective acquisition dates. Based on facts and circumstances available, management of the Company believes that the allowance for credit losses was appropriate at September 30, 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 8 - SUMMARY OF ACTIVITY IN THE ALLOWANCE FOR CREDIT LOSSES

	For the Nine Months Ended September 30
(Dollars in thousands)	2013			2012
Balance at beginning of period	$	251,603		$	193,761
Transfer of balance to OREO		(30,315	)		(24,177	)
Transfer of balance to the reserve for unfunded commitments		(9,828	)		—
Provision charged to operations		445			15,805
(Reversal of) Provision recorded through the FDIC loss share receivable		(58,565	)		33,786
Charge-offs:
Commercial and business banking		4,180			15,108
Mortgage		481			890
Consumer		4,487			4,282
		9,148			20,280
Recoveries:
Commercial and business banking		1,852			897
Mortgage		698			28
Consumer		1,803			1,567
		4,353			2,492
Net charge-offs		4,795			17,788
Allowance for loan losses		148,545			201,387
Transfer of balance from the allowance for loan losses		9,828			—
Provision for unfunded lending commitments		2,131			—
Balance at end of period	$	160,504		$	201,387
Allowance for loan losses to nonperforming assets (1) (2)		122.9	%		124.5	%
Allowance for loan losses to total loans at end of period (2)		0.84			1.16
Net charge-offs to average loans (3)		0.05			0.09

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

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

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

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TABLE 9 - SUMMARY OF ACTIVITY BY LOAN TYPE

	September 30, 2013												September 30, 2012
				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	$	168,576		$	74,211		$	8,816		$	251,603		$	118,900		$	74,861		$	—		$	193,761
(Reversal of) Provision for loan losses before benefit attributable to FDIC loss share agreements		(58,540	)		2,884			(2,464	)		(58,120	)		37,268			6,518			5,805			49,591
Benefit attributable to FDIC loss share agreements		58,565			—			—			58,565			(33,786	)		—			—			(33,786	)
Net (reversal of) provision for loan losses		25			2,884			(2,464	)		445			3,482			6,518			5,805			15,805
Decrease in FDIC loss share receivable		(58,565	)		—			—			(58,565	)		33,786			—			—			33,786
Transfer of balance to OREO		(29,302	)		—			(1,013	)		(30,315	)		(23,769	)		—			(408	)		(24,177	)
Transfer of balance to the RUFC		—			(9,828	)		—			(9,828	)		—			—			—			—
Loan charge-offs		(1,683	)		(7,455	)		(10	)		(9,148	)		(13,283	)		(6,818	)		(179	)		(20,280	)
Recoveries		—			4,353			—			4,353			19			2,455			18			2,492
Balance at end of period		79,051			64,165			5,329			148,545			119,135			77,016			5,236			201,387
Reserve for unfunded lending commitments
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			—			—			—			—
Allowance for credit losses	$	79,051		$	76,124		$	5,329		$	160,504		$	119,135		$	77,016		$	5,236		$	201,387

The allowance for credit losses was $160.5 million at September 30, 2013, or 1.77% of total loans, $91.1 million lower than at December 31, 2012. The allowance as a percentage of loans was 119 basis points below the 2.96% at December 31, 2012.

The decrease in the allowance was primarily related to a decrease in reserves on the covered and non-acquired loan portfolios. The allowance for credit losses on the covered portion of the loan portfolio decreased $89.5 million primarily due to a change in expected cash flows on certain of the acquired loan pools during the first nine months of 2013. The reserve was adjusted during 2013 to cover the expected losses in these pools. On a gross basis, the Company was able to reverse $58.6 million to account for these estimated cash flow changes. The reserve was also reduced by $29.3 million when loan collateral was moved to OREO during 2013.

For the non-covered portfolio, the allowance on the legacy portfolio declined $10.0 million, or 13.5%, since December 31, 2012, as $9.8 million was transferred to the reserve for unfunded lending commitments. 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 $5.3 million for losses probable in those portfolios at September 30, 2013 above estimated expected credit losses at acquisition.

At September 30, 2013, excluding the acquired loan portfolios, the allowance for loan losses covered nonperforming loans 1.4 times. On that same basis, the allowance for credit losses on non-covered loans covers total past due loans 1.5 times at December 31, 2012. Including acquired non-covered loans, the allowance for loan losses covered 64.2% of total past due and nonaccrual loans at September 30, 2013, an increase compared to the December 31, 2012 coverage of 64.9%.

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FDIC Loss Share Receivable

As part of the FDIC-assisted acquisitions in 2009 and 2010, the Company recorded a $1.0 billion receivable 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 receivable decreased $218.2 million, or 51.6%, during the first nine months of 2013 as the Company recorded a valuation allowance of $31.8 million, reduced the balance $58.6 million to offset the allowance for credit loss adjustment recorded, and claimed reimbursements from the FDIC totaling $44.9 million resulting from loan charge-offs, OREO sales, and OREO write-downs, included in other assets discussed below. The loss share receivable also decreased $68.7 million as a result of amortization during the current period. See Note 8 to the unaudited consolidated financial statements for discussion of the reimbursable loss periods of the loss share agreements.

The following table sets forth the activity in the FDIC loss share receivable asset for the periods indicated.

TABLE 10 - FDIC LOSS SHARE RECEIVABLE ACTIVITY

	For the Nine Months Ended September 30
(Dollars in thousands)	2013			2012
Balance at beginning of period	$	423,069		$	591,844
Change due to (reversal of) credit loss provision recorded on FDIC covered loans		(58,565	)		33,786
Amortization		(68,707	)		(89,899	)
Submission of reimbursable losses to the FDIC		(44,910	)		(97,511	)
Impairment		(31,813	)		—
Changes due to a change in cash flow assumptions on OREO and other		(14,189	)		(7,053	)
Balance at end of period	$	204,885		$	431,167

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. On April 10, 2013, the Audit Committee and the Board of Directors concluded that an impairment charge was required under generally accepted accounting principles applicable to the Company and should be recognized in the unaudited consolidated financial statements for 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.

Of the FDIC loss share receivables balance of $204.9 million, approximately $65.2 million is expected to be collected from the FDIC, $125.2 million, which represents improvements in cash flows expected to be collected from customers, is expected to be amortized over time, and $14.5 million is expected to be collected in conjunction with OREO transactions.

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. However, the sum of the historical and remaining projected losses under the remaining agreement is in excess of the clawback amount stated in that agreement. For the third agreement, the Company has recorded a $0.8 million liability at September 30, 2013 to reserve for the amount of consideration due to the FDIC based on cumulative losses to date. However, the future performance of the remaining covered assets (namely improvements in the forms of recoveries and/or reduced losses) for each of the three agreements beyond each agreement’s respective collection period could require the Company to be subject to the clawback provisions for that agreement.

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

Investment Securities

Investment securities increased by $170.0 million, or 8.7%, to $2.1 billion at September 30, 2013. The increase from December 31, 2012 was due to the use of available funds in the first nine months of 2013 to purchase available for sale investments in an effort to improve the yield on total earning assets. These additional investments were offset partially by the sales and maturities of investment securities during the first nine months of 2013. As a result of these purchases, investment securities increased to 16.1% of total assets at September 30, 2013, from 14.9% at December 31, 2012. Investment securities were 17.9% of average earnings assets in the current quarter and 18.0% in the third quarter of 2012. By intent, available for sale securities increased $219.4 million, or 12.6%, and held to maturity investments decreased $49.4 million, or 24.1%. The following table shows the carrying values of securities by category for the periods indicated.

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TABLE 11 - CARRYING VALUE OF SECURITIES

(Dollars in thousands)	September 30, 2013				December 31, 2012
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	401,800	19	%	$	285,724	15	%
Obligations of state and political subdivisions		112,241	5			127,075	7
Mortgage-backed securities		1,448,866	68			1,330,656	68
Other securities		1,482	—			1,549	—
		1,964,389	92			1,745,004	90
Securities held to maturity:
U.S. Government-sponsored enterprise obligations		34,471	2			69,949	4
Obligations of state and political subdivisions		84,471	4			88,909	4
Mortgage-backed securities		36,736	2			46,204	2
		155,678	8			205,062	10
	$	2,120,067	100	%	$	1,950,066	100	%

All of the Company’s mortgage-backed securities are agency securities. The Company does not hold any Fannie Mae or Freddie Mac preferred stock, corporate equity, collateralized debt obligations, collateralized loan obligations, or structured investment vehicles, nor does it hold any private label collateralized mortgage obligations, sub-prime, Alt-A, or second lien elements in its investment portfolio. At September 30, 2013, the Company’s investment portfolio did not contain any securities that are directly backed by subprime or Alt-A mortgages.

The following table summarizes activity in the Company’s investment securities portfolio during the first nine months of 2013. There were no transfers of securities between investment categories during the current period.

TABLE 12 - INVESTMENT PORTFOLIO ACTIVITY

(Dollars in thousands)	Available for Sale			Held to Maturity
Balance at beginning of period	$	1,745,004		$	205,062
Purchases		935,341			5,901
Sales, net of gains		(42,412	)		—
Principal maturities, prepayments and calls, net of gains		(618,059	)		(54,316	)
Amortization of premiums and accretion of discounts		(14,457	)		(969	)
Change in market value		(41,028	)		—
Balance at end of period	$	1,964,389		$	155,678

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, but not limited to:

• The length of time and extent to which the fair value of the securities was less than their amortized cost,

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• 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. Based on its analysis, the Company recorded an other-than-temporary impairment charge of $0.5 million during 2011 on one unrated municipal revenue bond. During that year, management assessed the operating environment of the bond issuer as adverse and thus concluded the other-than-temporary impairment charge was warranted. The specific impairment was related to the loss of the contracted revenue source required for bond repayment. The total impairment recorded was 50% of the par value of the bond and provided a fair value of the bonds that was consistent with current market pricing. Because adverse conditions were noted in the operations of the bond issuer, the Company recorded the other-than-temporary impairment, but noted no further deterioration in the operating environment of the bond issuer. No other declines in the market value of the Company’s investment securities are deemed to be other-than-temporary at September 30, 2013 and December 31, 2012.

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 that fluctuate daily depending on the funding needs of the Company and are currently invested overnight in interest-bearing deposit accounts at the FHLB of Dallas and Atlanta, the total balance of which earns interest at the current FHLB discount rate. The balance in interest-bearing deposits at other institutions of $292.7 million at September 30, 2013 decreased $430.1 million, or 59.5%, from $722.8 million at December 31, 2012. The primary cause of the decrease was the Company’s use of available cash to purchase higher-yielding investment securities, fund loan growth, and pay down its long-term debt, all in an attempt to improve its net interest margin. The Company’s cash activity is further discussed in the “Liquidity” section below.

Other Assets

The following table details the changes in other asset balances for the periods indicated.

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TABLE 13 - OTHER ASSETS COMPOSITION

(Dollars in thousands)	September 30, 2013		December 31, 2012		Increase (Decrease)
Other Earning Assets
FHLB and FRB stock	$	42,163	$	46,216	$	(4,053	)	(8.8	)%
Fed funds sold and financing transactions		—		4,875		(4,875	)	(100.0	)
Other interest-earning assets (1)		3,412		3,412		—		—
Total other earning assets		45,575		54,503		(8,928	)	(16.4	)
Non-Earning Assets
Premises and equipment		289,157		303,523		(14,366	)	(4.7	)
Bank-owned life insurance		103,303		100,556		2,747		2.7
Goodwill		401,872		401,872		—		—
Core deposit intangibles		15,747		19,122		(3,375	)	(17.6	)
Title plant and other intangible assets		7,492		7,660		(168	)	(2.2	)
Accrued interest receivable		31,296		32,183		(887	)	(2.8	)
Other real estate owned		128,987		121,536		7,451		6.1
Derivative market value		32,469		42,119		(9,650	)	(22.9	)
Receivable due from the FDIC		2,294		3,259		(965	)	(29.6	)
Investment in new market tax credit entities		133,917		137,508		(3,591	)	(2.6	)
Other		71,791		47,273		24,518		51.9
Total non-earning assets		1,218,325		1,216,611		1,714		0.1
Total other assets	$	1,263,900	$	1,271,114	$	(7,214	)	(0.6	)%

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

The $4.1 million decrease in FHLB and FRB stock was the result of $4.1 million in net stock repurchases during the first nine months of 2013. The repurchases are mandatory for eligible stock based on FHLB regulations.

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. The Company had $4.9 million in financing transactions outstanding at the end of 2012, whereas there were no fed funds sold or financing transactions at September 30, 2013. There was no change to the balance of other interest-earning assets from 2012.

Premises and equipment decreased $14.4 million as a result of the movement of closed branches during the third quarter of 2013 to OREO, as well as current year depreciation taken on the assets in service.

Bank-owned life insurance increased $2.7 million as a result of the income earned on policies during the first nine months of 2013.

Core deposit intangibles decreased $3.4 million due to amortization expense during the current period.

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 $7.5 million increase in OREO from December 31, 2012 was a result of the additional covered OREO properties at September 30, 2013. Covered OREO properties were $87.1 million and $77.2 million at September 30, 2013 and December 31, 2012, respectively, which represented an increase of $9.9 million, or 12.8%, during the current period. The increase was a result of the movement of foreclosed covered assets to OREO. Non-covered OREO decreased $2.4 million, or 5.4%, and was primarily a result of the sale of OREO properties during the first nine months of 2013. Excluding former bank properties included in OREO resulting from branch closures and property held for development, non-covered OREO decreased $3.7 million, or 10.6%.

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The decrease in the market value of the Company’s derivatives was primarily the result of the change in value of existing derivatives from December 31, 2012, and not a result of a decrease in derivative activity. The value of the derivatives at September 30, 2013 was affected by a decline in interest rates at the end of the third quarter.

The balance due to the Company from the FDIC from claims associated with the loss share agreements decreased $1.0 million in 2013 compared to 2012. The amount due from the FDIC at September 30, 2013 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 remained steady as the Company continues to manage the covered assets to ultimate disposition in a manner that is 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 $1.7 million and $3.3 million at September 30, 2013 and December 31, 2012, respectively.

Investments in new market tax credits decreased $3.6 million as a result of the amortization of the tax credits as they are recognized in the Company’s income tax provision calculation. Amortization of the Company’s tax credits offset the additional investment of $1.7 million in tax credit entities thus far in 2013.

The $24.5 million increase in other assets since December 31, 2012 was primarily the result of $17.4 million in temporary cash clearing items from wire transactions at September 30, 2013. These items were temporarily included in other assets until clearance with correspondent banks. In addition, the Company’s current income tax receivable increased $6.2 million as a result of additional estimated income tax payments recorded during the current nine-month period. Also affecting other assets was a $9.4 million increase in the deferred tax asset to account for future tax deductions on current period expenses and 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, 2012.

There was no significant change in the Company’s title plant balance since December 31, 2012.

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. Borrowings have become an important funding source as the Company has grown. Other funding sources include short-term and long-term borrowings, subordinated debt and shareholders’ equity. Refer to the “Liquidity” section below for further discussion of the Company’s sources and uses of funding sources. The following discussion highlights the major changes in the mix of deposits and other funding sources during the nine-month period ended September 30, 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 2013, total deposits increased $202.5 million, or 1.9%, totaling $11.0 billion at September 30, 2013, as total noninterest-bearing deposits increased $561.6 million and interest-bearing deposits decreased $359.1 million, or 4.1%, from December 31, 2012. Increases in the Company’s core deposit products were offset by a continued decline in total time deposits, as higher-priced certificates of deposit (“CDs”) matured and were not renewed due to continued rate reductions.

The following table sets forth the composition of the Company’s deposits for the periods indicated.

TABLE 14 - DEPOSIT COMPOSITION BY PRODUCT

(Dollars in thousands)	September 30, 2013				December 31, 2012				Increase (Decrease)
Noninterest-bearing deposits	$	2,529,296	23	%	$	1,967,662	18	%	$	561,634		28.5	%
NOW accounts		2,136,624	20	%		2,523,252	24	%		(386,628	)	(15.3	)%
Money market accounts		4,036,598	37	%		3,738,480	35	%		298,118		8.0	%
Savings accounts		384,178	3	%		364,703	3	%		19,475		5.3	%
Certificates of deposit		1,864,068	17	%		2,154,180	20	%		(290,112	)	(13.5	)%
	$	10,950,764	100	%	$	10,748,277	100	%	$	202,487		1.9	%

From a product perspective, interest-bearing deposits decreased $359.1 million, or 4.1%. Time deposit decreases of $290.1 million represented 80.8% of the total interest-bearing deposit decrease from December 31, 2012. Certificates of deposit in denominations of $100,000 and over decreased $142.2 million, or 12.4%, to $1.0 billion at September 30, 2013. The decrease was seen in many of the

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Company’s markets, including the New Orleans and Lafayette, Louisiana markets, as well as multiple Florida markets, where higher-priced certificates of deposit matured and were either not renewed or renewed at lower interest rates. Despite the decrease in time deposits, during the third quarter, 87% of maturing time deposits were renewed with an average 34 basis point rate reduction.

The increase in noninterest-bearing deposits continues to provide the Company with a good source of available funds for continued asset growth. Noninterest-bearing deposits as a percentage of total deposits have steadily risen over the past 21 months, from 16.0% at December 31, 2011 to 23.1% at September 30, 2013. During 2013, the Company transitioned approximately $246 million in deposits from interest-bearing NOW accounts earning less than three basis points into noninterest-bearing transaction accounts, accounting for approximately 44% of the total noninterest-bearing deposit growth.

From a market perspective, total deposit growth was seen primarily in the Houston, Texas, Baton Rouge, Louisiana, and Birmingham, Alabama markets. Houston’s customer deposits increased $442.4 million, or 82.2% during the first nine months of 2013. Total deposits in Baton Rouge region of Louisiana increased $28.3 million, or 5.1% since the end of 2012, while the Birmingham market had total customer deposit growth of $48.8 million, or 13.2%. Total deposit growth was offset by time deposit runoff in multiple Louisiana markets, including New Orleans and Lafayette, as well as various Alabama and Florida markets, most notably Mobile, Alabama and Sarasota, Florida.

Short-term Borrowings

The Company may obtain advances from the FHLB of Dallas based upon its ownership of FHLB stock and certain 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 ending September 30:

TABLE 15 – REPURCHASE TRANSACTIONS

(Dollars in thousands)	2013		2012
Average balance	$	288,029	$	245,486
Ending balance		258,850		241,501

Since December 31, 2012, total short-term borrowings decreased $44.2 million, or 14.6%, to $258.9 million at September 30, 2013. The decrease was the result of a decrease in securities sold under agreements to repurchase. On an average basis, short-term borrowings decreased 21.2% from the third quarter of 2012 and increased 1.4% on a year-to-date basis. The decrease in the average outstanding balance was largely due to management’s decision to use available cash to reduce higher-cost funding sources during the current year.

Total short-term borrowings were 2.2% of total liabilities and 47.9% of total borrowings at September 30, 2013 compared to 2.6% and 41.7%, respectively, at December 31, 2012. On an average basis, short-term borrowings were 2.5% of total liabilities and 50.6% of total borrowings in the current quarter, compared to 3.4% and 45.6%, respectively, during the third quarter of 2012.

The weighted average rate paid on short-term borrowings was 0.14% during the third quarter of 2013, down seven basis points compared to 0.21% for the third quarter of 2012. For the nine-month periods ended September 30, 2013 and 2012, the weighted average rate paid on short-term borrowings was 0.16% and 0.23%, respectively.

Long-term Debt

The Company’s long-term borrowings decreased $142.3 million, or 33.6%, to $281.1 million at September 30, 2013, compared to $423.4 million at December 31, 2012. The decrease in borrowings from December 31, 2012 was a result of the scheduled repayment of a portion of the Company’s long-term FHLB advances during the first nine months, as well as the redemption of $90.0 million in advances acquired in previous acquisitions. The early redemption resulted in additional expense of $2.3 million in the current year based on the prepayment penalty on the advances. As a result of the redemptions and repayment, the Company expects to reduce future interest expense by $1.3 million in total over the next three quarters. The Company’s efforts to reduce the balance of these higher-priced long-term borrowings has lead to a reduction in interest expense on the debt of $1.0 million for the third quarter and $1.8 million for the nine months of 2013 when compared to the same periods of 2012, despite the average rate paid on the debt rising 27 and 26 basis points, respectively.

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On average, long-term debt decreased to $282.3 million for the third quarter of 2013 and $328.9 million for the nine-month period of 2013, 35.7% and 24.1% lower, respectively, than the corresponding 2012 periods. Average long-term debt was 2.5% of total liabilities for the three months ended September 30, 2013, lower than the average during the third quarter of 2012 of 4.1%. For the nine-month period, average long term debt decreased to 2.9% of total liabilities from 4.2% in 2012. On a period-end basis, long-term debt was 2.4% of total liabilities at September 30, 2013, also a decrease from 3.6% at December 31, 2012.

Long-term borrowings at September 30, 2013 included $93.3 million in fixed-rate advances from the FHLB of Dallas and Atlanta which cannot be paid off without incurring substantial prepayment penalties. The remaining debt consisted of $111.9 million of junior subordinated deferrable interest debentures of the Company and $75.9 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, 2013, shareholders’ equity totaled $1.5 billion, a decrease of $4.6 million, or 0.3%, compared to December 31, 2012. The following table details the changes in shareholders’ equity during the nine months ended September 30, 2013.

TABLE 16 - CHANGES IN SHAREHOLDERS’ EQUITY

(Dollars in thousands)
Balance, beginning of period	$	1,529,868
Net income		39,499
Other comprehensive loss		(25,794	)
Reissuance of treasury stock under management incentive plans, net of shares surrendered		4,003
Cash dividends declared		(30,307	)
Share-based compensation cost		7,999
Balance, end of period	$	1,525,268

During the nine-month period ended September 30, 2013, shareholder’s equity decreased primarily as a result of a $25.8 million change in the unrealized gain on the available for sale investment portfolio resulting from interest rate changes toward the end of the period. Net income of $39.5 million for the first nine months of 2013 was offset by dividend payments to common shareholders of $30.3 million in the first nine months of 2013, or $1.02 per common share.

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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, 2013, the Company exceeded all regulatory capital ratios.

At the end of the third quarter, the Company’s regulatory capital ratios and those of IBERIABANK were in excess of the levels established for “well-capitalized” institutions, as shown in the following table.

TABLE 17 - REGULATORY CAPITAL RATIOS

(Dollars in thousands)		Well-Capitalized			September 30, 2013					December 31, 2012
Ratio	Entity	Minimums			Actual			Excess Capital (1)		Actual			Excess Capital (1)
Tier 1 Leverage	Consolidated		5.00	%		9.65	%	$	583,267		9.70	%	$	574,140
	IBERIABANK		5.00			8.35			418,209		8.57			433,657
Tier 1 risk-based capital	Consolidated		6.00			12.02			606,120		12.92			634,956
	IBERIABANK		6.00			10.39			440,602		11.41			493,695
Total risk-based capital	Consolidated		10.00			13.28			329,851		14.19			384,518
	IBERIABANK		10.00			11.65			165,200		12.68			244,337

⁽¹⁾  Excess capital is defined as the dollar amount of the Company’s capital above minimum capital required to remain “well capitalized” under current guidelines but does not represent the Company’s view of optimum capital levels.

The decrease in capital ratios from December 31, 2012 was primarily the result of the deployment of excess liquidity that carried a 0% risk weighting into loans and other investments that carried a higher risk rating.

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 rule on January 1, 2015, and certain provisions of the new rule will be phased in from that date to January 1, 2019.

The final rule:

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

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

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

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

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

• Establishes a minimum leverage ratio requirement of 4%,

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

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

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

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

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

Management is currently evaluating the provisions of the final rule and their expected impact on the Company and IBERIABANK. Management believes that at September 30, 2013, 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 $23.2 million and $21.2 million for the three months ended September 30, 2013 and 2012, respectively. Earnings per share (“EPS”) on a diluted basis were $0.78 and $0.73 for the third quarters of 2013 and 2012, respectively. On a year-to-date basis, earnings to common shareholders totaled $39.5 million, or $1.33 per diluted share, down $13.7 million or $0.48 per diluted share, from the first nine months of 2012.

In the first nine months of 2013, net interest income increased $5.0 million, or 1.8%, over the same period of 2012, as interest expense decreased $12.4 million, or 25.4%, and interest income decreased $7.3 million, or 2.2%. Net interest income increased as a result of the decrease in the cost of interest-bearing liabilities, but was offset by a similar decrease in earning asset yields. The decrease in yields on earning assets was offset partially by additional customer loan volume in 2013, resulting from both acquisition and organic growth. Income available to common shareholders was also positively impacted by a $15.4 million decrease in the provision for loan losses, but was negatively impacted by a $51.7 million increase in noninterest expenses, the drivers of which are discussed below in the “Noninterest Expense” section of the discussion. The Company experienced similar trends in net interest income, provision for loan losses, and noninterest income and expense for the three months ended September 30, 2013 when compared to the third quarter of 2012. An increase in net interest income of 0.8%, decrease in provision for loan losses of 50.3%, and decrease in noninterest expenses of 1.5% drove the $2.0 million, or 9.2%, increase in income available to common shareholders.

The decrease in income before income taxes lowered income tax expense $13.0 million for the nine-month period of 2013 when compared to the corresponding 2012 period. The change in income taxes, and the effective income tax rate, was a result of the tax effect of significant non-recurring expenses during the current periods, including the indemnification asset impairment and branch closure costs. Income tax expense in the third quarter of 2013 was also impacted by a reduction of $0.7 million in expense as a result of the Company’s true-up of its tax liability from the previous year with its filed income tax return. Cash earnings, defined as net income before the net of tax amortization of acquisition intangibles, amounted to $24.0 million and $22.1 million for the quarters ended September 30, 2013 and 2012, respectively.

The following discussion provides additional information on the Company’s operating results for the three-month and nine-month periods ended September 30, 2013 and 2012, segregated by major income statement caption.

Net Interest Income

Net interest income is the difference between interest realized on earning assets and interest paid on interest-bearing liabilities and is also the driver of core earnings. As such, it is subject to constant scrutiny by management. The rate of return and relative risk associated with earning assets are weighed to determine the appropriateness and mix of earning assets. Additionally, the need for lower cost funding sources is weighed against relationships with clients and future growth requirements. The Company’s net interest spread, which is the

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difference between the yields earned on average earning assets and the rates paid on average interest-bearing liabilities, was 3.25% and 3.45% during the third quarters of 2013 and 2012, respectively. The Company’s net interest margin on a taxable equivalent (“TE”) basis, which is net interest income (TE) as a percentage of average earning assets, was 3.37% and 3.58%, respectively, for the same periods. Net interest spread and net interest margin were affected in the third quarter of 2013 by additional amortization of the Company’s FDIC loss share receivable due to the adoption of ASU No. 2012-06 in the current year.

Net interest income increased $0.7 million to $97.5 million in the third quarter of 2013 when compared to the corresponding quarter of 2012. The improvement in net interest income was the result of a $764.4 million increase in average earning assets as well as a decrease in the average cost of interest-bearing liabilities of 20 basis points. These improvements were offset by a 2.5% increase in the average balance of interest-bearing liabilities and a 40 basis point decrease in earning asset yield. The average balance sheet growth over the past twelve months is primarily a result of growth in both earning assets and deposits.

The Company experienced similar trends in net interest income and the corresponding net interest spread and net interest margin for the nine months ended September 30, 2013 when compared to the same period of 2012. Net interest spread decreased 22 basis points, while net interest margin on a tax-equivalent basis decreased 26 basis points. Net interest income, however, increased $5.0 million, or 1.8%, as average earning assets increased $1.1 billion, or 9.9%. Additionally, the rate paid on interest-bearing liabilities decreased 23 basis points. Offsetting these positive effects on net interest income were a decline in the earning asset yield of 46 basis points and an increase in average interest-bearing liabilities of $623.5 million, or 7.3%.

Average loans made up 76.9% and 73.5% of average earning assets in the third quarters of 2013 and 2012, respectively. Quarter-to-date average loans increased $591.1 million, or 7.1%, since December 31, 2012, and $958.5 million, or 12.0%, since September 30, 2012, as a result of loan growth in the non-covered loan portfolio. Investment securities made up 17.9% of average earning assets during the current quarter, compared to 18.0% during the same period of 2012. 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 paying down its short-term and long-term debt in efforts to improve net interest income. Other significant components of earning assets during the third quarter of 2013 included the FDIC loss share receivable (2.0% of average earning assets) and excess liquidity (1.8% of average earning assets). During the third quarter of 2012, the FDIC loss share receivable was 4.1% of average earning assets, with excess liquidity accounting for 2.2% of average earning assets.

Average interest-bearing deposits made up 93.6% of average interest-bearing liabilities during the current quarter, up from 90.8% during the third quarter of 2012. Average short-term and long-term borrowings both made up 3.2% of average interest-bearing liabilities in the third quarter of 2013, respectively, compared to 4.2% and 5.0% during the third quarter of 2012.

The following tables set forth, for the periods indicated, 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 nonearning assets. TE yields are calculated using a marginal tax rate of 35%.

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TABLE 18 – QUARTERLY AVERAGE BALANCES, NET INTEREST INCOME AND INTEREST YIELDS / RATES

	For The Three Months Ended September 30
	2013									2012
(Dollars in thousands)	Average Balance			Interest Income/Expense			Yield/ Rate			Average Balance			Interest Income/Expense			Yield/ Rate
Earning Assets:
Loans receivable:
Commercial loans (TE)	$	6,443,410		$	88,934			5.49	%	$	5,832,375		$	97,048			6.61	%
Mortgage loans		545,017			6,884			5.05	%		418,925			8,167			7.80	%
Consumer and other loans		1,986,920			24,217			4.84	%		1,765,529			28,182			6.35	%
Total loans		8,975,347			120,035			5.32	%		8,016,829			133,397			6.61	%
Loans held for sale		119,343			1,289			4.32	%		182,543			1,466			3.21	%
Investment securities (TE)		2,093,549			9,486			1.98	%		1,963,451			9,942			2.22	%
FDIC loss share receivable		228,047			(22,875	)		-39.25	%		448,746			(33,488	)		-29.20	%
Other earning assets		258,362			577			0.89	%		298,681			634			0.85	%
Total earning assets		11,674,648			108,512			3.74	%		10,910,250			111,951			4.14	%
Allowance for loan losses		(160,994	)								(180,798	)
Nonearning assets		1,430,781									1,453,102
Total assets	$	12,944,435								$	12,182,554
Interest-bearing liabilities
Deposits:
NOW accounts	$	2,257,050			1,909			0.34	%	$	2,023,769			1,777			0.35	%
Savings and money market accounts		4,213,764			2,603			0.25	%		3,701,947			4,240			0.46	%
Certificates of deposit		1,918,669			4,012			0.83	%		2,206,939			5,530			1.00	%
Total interest-bearing deposits		8,389,483			8,524			0.40	%		7,932,655			11,547			0.58	%
Short-term borrowings		289,659			104			0.14	%		367,443			197			0.21	%
Long-term debt		282,314			2,432			3.37	%		438,828			3,481			3.10	%
Total interest-bearing liabilities		8,961,456			11,060			0.49	%		8,738,926			15,225			0.69	%
Noninterest-bearing demand deposits		2,338,772									1,773,302
Noninterest-bearing liabilities		130,052									150,988
Total liabilities		11,430,280									10,663,216
Shareholders’ equity		1,514,155									1,519,338
Total liabilities and shareholders’ equity	$	12,944,435								$	12,182,554
Net earning assets	$	2,713,192								$	2,171,324
Net interest spread				$	97,452			3.25	%				$	96,726			3.45	%
Net interest income (TE) / Net interest margin (TE)				$	99,773			3.37	%				$	99,143			3.58	%

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TABLE 19 – YEAR-TO-DATE AVERAGE BALANCES, NET INTEREST INCOME AND INTEREST YIELDS / RATES

	For The Nine Months Ended September 30
	2013									2012
(Dollars in thousands)	Average Balance			Interest Income/Expense			Yield/ Rate			Average Balance			Interest Income/Expense			Yield/ Rate
Earning Assets:
Loans receivable:
Commercial loans (TE)	$	6,324,468		$	258,420			5.48	%	$	5,569,467		$	279,329			6.69	%
Mortgage loans		504,154			21,868			5.78	%		445,085			24,910			7.46	%
Consumer and other loans		1,928,747			78,056			5.41	%		1,650,302			77,973			6.31	%
Total loans		8,757,369			358,344			5.48	%		7,664,854			382,212			6.65	%
Loans held for sale		155,900			3,965			3.39	%		145,138			3,747			3.44	%
Investment securities (TE)		2,065,295			27,323			1.94	%		1,981,130			32,334			2.38	%
FDIC loss share receivable		293,116			(68,707	)		-30.91	%		510,097			(89,899	)		-23.16	%
Other earning assets		423,776			2,180			0.69	%		343,771			2,028			0.79	%
Total earning assets		11,695,456			323,105			3.74	%		10,644,990			330,422			4.20	%
Allowance for loan losses		(196,412	)								(179,927	)
Nonearning assets		1,467,475									1,431,895
Total assets	$	12,966,519								$	11,896,958
Interest-bearing liabilities
Deposits:
NOW accounts	$	2,402,803			5,836			0.32	%	$	1,977,963			5,577			0.38	%
Savings and money market accounts		4,166,013			8,864			0.28	%		3,569,705			12,824			0.48	%
Certificates of deposit		2,024,369			13,038			0.86	%		2,321,289			19,755			1.14	%
Total interest-bearing deposits		8,593,185			27,738			0.43	%		7,868,957			38,156			0.65	%
Short-term borrowings		292,453			365			0.16	%		288,545			507			0.23	%
Long-term debt		328,856			8,196			3.29	%		433,510			9,999			3.03	%
Total interest-bearing liabilities		9,214,494			36,299			0.52	%		8,591,012			48,662			0.75	%
Noninterest-bearing demand deposits		2,097,110									1,648,502
Noninterest-bearing liabilities		130,368									150,658
Total liabilities		11,441,972									10,390,172
Shareholders’ equity		1,524,547									1,506,786
Total liabilities and shareholders’ equity	$	12,966,519								$	11,896,958
Net earning assets	$	2,480,962								$	2,053,978
Net interest spread				$	286,806			3.22	%				$	281,760			3.44	%
Net interest income (TE) / Net interest margin (TE)				$	293,988			3.33	%				$	288,970			3.59	%

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.

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TABLE 20 - AVERAGE LOAN BALANCE AND YIELDS

	Three Months Ended September 30										Nine Months Ended September 30
	2013					2012					2013					2012
(Dollars in thousands)	Average Balance		Average Yield			Average Balance		Average Yield			Average Balance		Average Yield			Average Balance		Average Yield
Non-covered loans (TE) (1)	$	8,103,580		4.39	%	$	6,862,953		4.55	%	$	7,802,719		4.41	%	$	6,443,113		4.67	%
Covered loans (TE) (1)		871,768		13.90			1,153,876		18.88			954,650		14.28			1,221,741		22.48
FDIC loss share receivable		228,047		(39.25	)		448,746		(29.20	)		293,116		(30.91	)		510,097		(23.16	)
		1,099,815		3.66			1,602,622		7.60			1,247,766		3.64			1,731,838		5.26
	$	9,203,395		4.21	%	$	8,465,575		4.71	%	$	9,050,485		4.30	%	$	8,174,951		4.79	%

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

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.

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TABLE 21 - SUMMARY OF CHANGES IN NET INTEREST INCOME

	For the Three Months Ended									For the Nine Months Ended
	September 30, 2013 / 2012									September 30, 2013 / 2012
	Change Attributable To									Change Attributable To
(Dollars in thousands)	Volume			Rate			Increase (Decrease)			Volume			Rate			Increase (Decrease)
Earning assets:
Loans receivable:
Commercial loans (TE)	$	9,862		$	(17,976	)	$	(8,114	)	$	35,051		$	(55,960	)	$	(20,909	)
Mortgage loans		2,059			(3,342	)		(1,283	)		3,030			(6,072	)		(3,042	)
Consumer and other loans		2,786			(6,751	)		(3,965	)		11,485			(11,402	)		83
Loans held for sale		(595	)		418			(177	)		274			(56	)		218
Investment securities (TE)		498			(954	)		(456	)		1,016			(6,027	)		(5,011	)
FDIC loss share receivable		19,804			(9,191	)		10,613			45,406			(24,214	)		21,192
Other earning assets		(157	)		100			(57	)		(159	)		311			152
Net change in income on earning assets		34,257			(37,696	)		(3,439	)		96,103			(103,420	)		(7,317	)
Interest-bearing liabilities:
Deposits:
NOW accounts		199			(67	)		132			1,097			(838	)		259
Savings and money market accounts		408			(2,045	)		(1,637	)		1,508			(5,468	)		(3,960	)
Certificates of deposit		(669	)		(849	)		(1,518	)		(2,315	)		(4,402	)		(6,717	)
Borrowings		(1,377	)		235			(1,142	)		(2,565	)		620			(1,945	)
Net change in expense on interest-bearing liabilities		(1,439	)		(2,726	)		(4,165	)		(2,275	)		(10,088	)		(12,363	)
Change in net interest spread	$	35,696		$	(34,970	)	$	726		$	98,378		$	(93,332	)	$	5,046

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

The decrease in yield on total earning assets between 2012 and 2013 was driven by lower yields on the Company’s loan and investment security portfolios, as well as a higher amortization of the Company’s FDIC loss share receivable (that results in a negative yield for this asset).

For the nine months ended September 30, 2013, the decrease in the rates earned on the Company’s assets drove the $7.3 million decrease in interest income, but average balance increases in the largest components of earning assets partially offset these rate decreases. Average loan balances increased $1.1 billion, or 14.3%, over the comparable 2012 nine-month period and can be attributed to the non-covered loan growth since September 30, 2012, both from the Florida Gulf acquisition and organic non-covered loan growth. Covered loan yields decreased 162 basis points during the current year. Interest income growth was also slowed in the current year by a decrease in the yield on the Company’s non-covered loan portfolio of 26 basis points to 4.41%. The total yield of the loan portfolio when including the loss share receivable was 4.30%, 49 basis points lower than the same period of 2012, and offset the income earned on loan volume increases over 2012. 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.

Interest income growth was also slowed by a 44 basis point decrease in the yield on investment securities. Average year-to-date investment securities increased $84.2 million; however, between the third quarters of 2013 and 2012, partially offsetting the effect the yield decline had on interest income. Despite the decrease in yield, investment securities yielded 1.94% during the first nine months of 2013, well above the yield on interest-bearing cash and fed funds sold of 0.22% for the same period.

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Driven by a decrease of 23 basis points in the rate paid on interest-bearing liabilities during the current year, interest expense decreased $12.4 million, or 25.4%, from the first nine months of 2012. Despite an increase of $724.2 million in average interest-bearing deposits (a result of both acquired Florida Gulf deposits and organic deposit growth), interest expense on deposits decreased 27.3%, or $10.4 million, from 2012, as the average rate paid on these deposits decreased to 0.43% for the first nine months of 2013, a 22 basis point decline. Higher-yielding time deposits across many markets either matured or were repriced during 2013, driving the expense and rate decreases. Interest expense on the Company’s short-term and long-term borrowings also decreased from the first nine months of 2012, as a seven basis point decrease in the rate paid on short-term borrowings offset a 26 basis point increase in the rate paid on long-term borrowings.

Provision for Loan Losses

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

On a consolidated basis, the Company recorded a provision for loan losses of $2.0 million for the three months ended September 30, 2013, a $2.1 million, or 50.3%, decrease from the provision recorded for the same period of 2012. The Company also recorded a provision for unfunded lending commitments of $1.6 million during the current quarter. As a result, the Company’s total provision for credit losses was $3.6 million, $0.4 million, or 10.4%, below the third quarter of 2012. On a year-to-date basis, the provision for credit losses of $2.6 million was $13.2 million below that of the first nine months of 2012. The Company’s provision for the first nine months of 2013 included a reversal of provision for changes in expected cash flows on the acquired loan portfolios (covered and non-covered) of $2.4 million, and a $2.9 million provision recorded on non-acquired loans based on loan growth. The total provision was limited in the first nine months of 2013 by an improvement in legacy portfolio asset quality over the past 12 months, as multi-year net charge-off trends in this portfolio continue to show signs of improvement. On a quarter-to-date basis, the decrease was a result of the improvement noted above, but was also the result of a decrease in the provision recorded on the Company’s acquired (both covered and non-covered) loan portfolios.

Non-covered loans past due totaled $108.2 million at September 30, 2013, a decrease of $19.7 million from December 31, 2012. Past due loans, including nonaccrual loans, were 1.30% of total loans (before acquired loan discount adjustments) at the end of the third quarter of 2013, a 41 basis point decrease from December 31, 2012. Excluding the acquired loans, loans past due were 0.75% of total loans at September 30, 2013, an improvement of 17 basis points from the fourth quarter of 2012.

Net charge-offs on the consolidated portfolio were $4.8 million year-to-date, for a net charge-off percentage of 0.07%, 24 basis points below the 0.31% through the third quarter of 2012. The net charge-offs thus far in 2013 were a result of $9.1 million in charge-offs and $4.4 million in recoveries.

The Company believes the allowance was appropriate at September 30, 2013, December 31, 2012, and September 30, 2012 to cover probable losses in the loan portfolio. The allowance for loan losses as a percentage of outstanding loans, net of unearned income, decreased 132 basis points from 2.96% at December 31, 2012 to 1.64% at September 30, 2013.

Excluding acquired loans, the Company’s allowance for the non-covered portfolio was 0.83% of non-covered loans at September 30, 2013 and 1.12% at December 31, 2012. On the same basis, the Company’s allowance at September 30, 2013 was 141.8% of total nonperforming loans, which compares favorably to 81.3% of nonperforming loans at the end of 2012.

Noninterest Income

The Company’s operating results for the three months ended September 30, 2013 included noninterest income of $43.3 million compared to $46.6 million for the same period of 2012. Noninterest income totaled $130.2 million and $125.6 million for the nine months ended September 30, 2013 and 2012, respectively. The growth of noninterest income has been a management focus in response to a challenging interest rate environment. As a result, the Company has continued to increase its investments in its wealth management, trust, and brokerage businesses in order to improve its noninterest income. Noninterest income as a percentage of total gross revenue (defined as total interest and noninterest income) thus far in 2013 increased to 28.7% compared to 27.5% of total gross revenue through the third quarter of 2012.

The following table illustrates the primary components of noninterest income for the periods indicated.

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TABLE 22 - NONINTEREST INCOME

	Three Months Ended					Percent			Nine Months Ended					Percent
	September 30					Increase			September 30					Increase
(Dollars in thousands)	2013		2012			(Decrease)			2013		2012			(Decrease)
Service charges on deposit accounts	$	7,512	$	6,952			8.1	%	$	21,415	$	19,557			9.5	%
Mortgage income		15,202		23,215			(34.5	)		51,841		55,118			(5.9	)
Title revenue		5,482		5,623			(2.5	)		16,199		15,495			4.5
ATM/debit card fee income		2,476		2,377			4.2			7,017		6,566			6.9
Income from bank-owned life insurance		908		916			(1.0	)		2,747		2,771			(0.9	)
Gain on sale of investments, net (1)		13		41			(68.3	)		2,315		3,779			(38.7	)
Broker commission income		3,950		3,092			27.8			11,347		9,254			22.6
Gain (loss) on sale of assets		2		(94	)		102.2			51		(144	)		135.7
Trust income		1,500		1,101			36.2			4,140		3,105			33.3
Credit card income		1,799		1,254			43.5			4,603		3,432			34.1
Other income		4,419		2,076			112.8			8,567		6,710			27.7
Total noninterest income	$	43,263	$	46,553			(7.1	)%	$	130,242	$	125,643			3.7	%

(1) Gain on sale of investments includes gains on calls of held to maturity securities of $16,000 for the three months ended September 30, 2013 and $56,000 and $35,000 for the nine months ended September 30, 2013 and 2012, respectively.

Service charges on deposit accounts increased $0.6 million in the third quarter of 2013 over the prior quarter-to-date period, and $1.9 million on a year-to-date basis, due primarily to an increase in service charge fees and NSF charges. Customers increased as a result of the Florida Gulf acquisition and new branch openings over the past 12 months.

Thus far in 2013, IMC has had increases in production and sales volume, but lower margins and the change in value of the Company’s mortgage derivatives offset production and sales growth and resulted in a $3.3 million decrease in mortgage loan income from the nine months ended September 30, 2012. Sales proceeds increased $180.6 million, or 10.4%, between the two periods, but was offset partially by a lower margin on sales. Derivative income was $3.2 million lower than the nine months ended September 30, 2012. For the quarter-to-date period, the combination of a lower margin on the sales and a $122 million decrease in sales volume in the third quarter of 2013 led to an $8.0 million decrease in mortgage income between the two quarterly periods.

Title income decreased $0.1 million during the third quarter of 2013 when compared to the same period of 2012, but increased $0.7 million for the nine-month period, and was the result of a favorable mortgage business environment, fueled by low mortgage interest rates.

Quarter-to-date ATM/debit card fee income increased $0.1 million from the corresponding 2012 period, while year-to-date income increased $0.5 million, primarily due to an increase in interchange fee income from increases in transaction volume from the expanded cardholder base and in usage by customers.

On July 31, 2013, the U.S. District Court for the District of Columbia issued an Order vacating portions of the FRB’s Debit Card Interchange Fee and Routing regulations related to the calculation of transaction fees and network processing non-exclusivity. The Order would require the FRB to revise its Debit Card Interchange Fee regulations, which serve to limit the fees that issuers can charge for debit card interchange transactions, as well as its regulations relating to routing of debit card interchange transactions. The regulations will remain in effect until resolution of an appeal of the District Court’s opinion to the Court of Appeals for the D.C. Circuit. The financial impact of the Court’s ruling on the Company cannot be determined at this time.

Income earned from bank owned life insurance remained flat in the third quarter and first nine months of 2013 when compared to the same periods of 2012, consistent with market performance and current yields. There have been no significant investments in bank owned life insurance over the past 12 months.

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Gains on investment sales were minimal in the third quarters of 2013 and 2012. On a year-to-date basis, gains on investment sales decreased $1.5 million, primarily due to changes in sales volume. Gains were recorded on the sale of $42.4 million in available-for-sale securities and the call of $54.3 million of held-to-maturity investments for the nine months of 2013, compared to the sale or call of $183.6 million in securities during the first three quarters of 2012.

The Company’s wealth management subsidiaries had very successful revenue growth, as total broker commissions increased $2.1 million compared to 2012 ($0.9 million between the two third quarter periods), 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 $0.7 million, or 273.4%, over the third quarter of 2012, while sales and trade commissions increased $0.2 million, or 6.2%. For the nine months ended September 30, 2013, wealth management income increased $2.2 million, or 202.5%, offset by lower sales commissions of $0.2 million, or 1.9%.

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 2012. Trust income has increased $1.0 million on a year-to-date basis, while credit card income has increased $1.2 million from the nine-month period ended September 30, 2012.

Other noninterest income increased $2.3 million for the three months ended September 30, 2013 when compared to the corresponding three-month period of 2012, and $1.9 million on a year-to-date basis. The primary driver of the increase was an increase in commission income earned on the Company’s customer derivatives. Total commission income increased $1.7 million and $1.9 million, respectively, in the current three- and nine-month periods of 2013 over the corresponding 2012 periods.

Noninterest Expense

The Company’s results for the third quarter of 2013 included noninterest expenses of $108.2 million, $1.7 million below noninterest expenses of $109.8 million for the third quarter of 2012. The decrease was primarily a result of a decrease in merger-related expenses between the periods. In the third quarter of 2012, the Company incurred $3.0 million in merger-related expenses as part of its Florida Gulf acquisition. Merger-related expenses in the third quarter of 2013 were less than $0.1 million. On a year-to-date basis, noninterest expense was $51.7 million, or 16.2%, higher than the same period of 2012. 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 noninterest expense. The Company currently operates 267 combined offices, a decrease of ten offices from September 30, 2012 after adjusting for closed or consolidated branches and offices.

In the current nine-month period, the most significant driver of the increase in noninterest expense over the same period of 2012 were three non-operating expenses: a $4.6 million impairment recorded on the Company’s branches that closed during the first nine months of 2013, the $31.8 million impairment of the Company’s indemnification assets 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 three charges, noninterest expense would have increased $15.7 million, or 5.0%, an increase more representative of the Company’s growth over the past 12 months.

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The following table illustrates the primary components of noninterest expense for the periods indicated.

TABLE 23 - NONINTEREST EXPENSE

	Three Months Ended					Percent			Nine Months Ended				Percent
	September 30					Increase			September 30				Increase
(Dollars in thousands)	2013			2012		(Decrease)			2013		2012		(Decrease)
Salaries and employee benefits		59,234			59,938		(1.2	)		185,578		172,878		7.3
Net occupancy and equipment		14,572			13,869		5.1			44,050		39,496		11.5
Franchise and shares tax		911			1,023		(11.0	)		2,986		3,664		(18.5	)
Communication and delivery		2,899			3,152		(8.1	)		9,286		9,424		(1.5	)
Marketing and business development		2,350			2,189		7.3			8,486		7,964		6.6
Data processing		4,837			4,931		(1.9	)		13,093		11,537		13.5
Printing, stationery and supplies		581			848		(31.4	)		2,004		2,523		(20.6	)
Amortization of acquisition intangibles		1,179			1,287		(8.4	)		3,543		3,865		(8.3	)
Professional services		4,156			5,947		(30.1	)		13,675		15,665		(12.7	)
Costs of OREO, net		(359	)		270		(232.7	)		980		4,453		(78.0	)
Credit and other loan related expense		5,248			4,846		8.3			13,155		13,709		(4.0	)
Insurance		3,125			2,615		19.5			8,408		7,745		8.6
Travel and entertainment		1,912			2,398		(20.3	)		6,199		7,158		(13.4	)
Impairment of long-lived assets		1,319			—		100.0			37,750		2,743		1,276.3
Other expenses		6,188			6,535		(5.3	)		21,217		15,920		33.3
	$	108,152		$	109,848		(1.5	)%	$	370,410	$	318,744		16.2	%

Salaries and employee benefits increased $12.7 million in the first nine months of 2013 when compared to the corresponding 2012 period, but decreased $0.7 million between the two third quarter periods. The increase was primarily the result of increased staffing due to the growth of the Company, specifically the full year-to-date impact of additional Florida Gulf personnel, as well as back office support functions. Full-time equivalent employees increased to over 2,500 at the end of the third quarter. The Company added these employees as part of the Florida Gulf acquisition, but the increase also includes revenue-producing positions at its mortgage origination subsidiary.

For the nine months of 2013, total salaries and other employee compensation increased $6.4 million, or 5.7%, over the same period of 2012, while payroll taxes, medical and hospitalization expenses, and other employee benefits increased $1.2 million $1.7 million, and $0.5 million, respectively. The increase in compensation is a result of the increase in headcount due to the growth of the Company, but is also a result of seven additional months of compensation expense from Florida Gulf employees in 2013. Total employee compensation in the current year also included $1.9 million of additional share-based incentive compensation due to additional restricted stock, phantom stock, and option grants over the past 12 months. The increase in share-based compensation was also a result of the increase in share price over the past 12 months. Employee compensation also includes severance and retention payments, which increased $0.5 million, or 20.7%, on a year-to-date basis. The increase in these severance expenses was primarily a result of severance for branch closures. The increase in medical and hospitalization expenses was partially from an increase in headcount and partially from higher claims processed in the current year.

Between the two third quarter periods of 2013 and 2012, total salaries and employee benefits decreased $0.7 million, and was the result of lower incentive commissions earned. Mortgage-related commissions are paid based on production. The decrease in these expenses is consistent with the changes in related income earned between the two periods.

Net occupancy and equipment expenses were up $0.7 million from the third quarter of 2012 and up $4.6 million from the first nine months of 2012. These increased costs are primarily due to increased depreciation expense as a result of additional branches opened and the Florida Gulf branches, but also includes $1.0 million in accelerated depreciation on the branches that were closed in 2013. Occupancy and equipment expenses also include repairs and maintenance on branches, utilities, rentals and property taxes. Repairs and maintenance expenses increased $0.9 million for the three-month period and $2.4 million for the nine-month period and accounts for most of the remaining increase over the corresponding periods ended September 30, 2012.

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Despite the growth of the Company over the past 12 months, professional services expense thus far in 2013 was $2.0 million lower than in 2012. 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, legal expenses have decreased $1.0 million, driven by lower settlement and litigation expenses. In addition, the Company’s merger-related professional service expenses are $1.2 million below the same period of 2012. Offsetting these decreases, consulting expenses increased in the current year as the Company engages consultants 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 drove the increase in total consulting expenses over the first three quarters of 2012. The Company expects to see the benefit of these improvements in future periods. Similar changes in these professional expenses contributed to the quarterly decrease.

Net costs of OREO properties decreased $0.6 million from the third quarter of 2012, primarily the result of $0.8 million in additional gains on sales. A decrease of $3.5 million for the year-to-date period occurred, as write-downs taken on OREO properties decreased $0.9 million, or 18.5%, and property taxes paid on properties held decreased $0.4 million, or 41.2%. In addition, insurance and maintenance expenses decreased 45.5%, or $1.0 million, from the nine-month period of 2012, while the gain recorded on sales of OREO properties increased $1.1 million, or 27.6%.

Credit and loan related expenses increased $0.4 million between the third quarters of 2012 and 2013 due to the $1.6 million provision recorded on the Company’s unfunded lending commitments. Excluding this provision, quarter-to-date credit and loan-related expenses would have decreased $1.2 million, or 25.1%. For the nine-month period there was a decrease of $0.6 million compared to the first nine months of 2012, which is consistent with the general improvement in asset quality between periods. Total expenses incurred for appraisal, inspection, underwriting, certification, and collections have decreased as the number of problem credits has decreased.

Insurance expenses increased $0.5 million in the third quarter of 2013, and $0.7 million on a year-to-date basis, primarily as a result of higher deposit insurance in the current periods. The increase in deposit insurance was a result of an increase in the assessment base used by the FDIC to calculate deposit insurance, and not the result of a significant change in assessment rate on deposits due to a change in bank soundness. Despite the increased Company footprint, property, casualty, and other non-deposit insurance expenses have remained flat with the corresponding 2012 periods.

Travel and entertainment expenses decreased $0.5 million between the third quarter periods and $1.0 million from the first nine months of 2012. These decreases are primarily a result of the steady decrease in transportation and lodging costs as the Company leverages technology to limit the amount of business travel required to conduct its business, despite the expansion of its branch network and number of locations, as well as general increases in mileage, lodging, and flight costs.

Other noninterest expenses for the third quarter of 2013 decreased $0.3 million from the same period of 2012 but were up $5.3 million over the first nine months of 2012. The year-to-date increase was primarily the result of an increase in debit card expenses, specifically $0.5 million incurred in the second quarter of 2013 as part of the cancellation of the Company’s debit card rewards program. Also affecting 2013 results was an increase in expenses from the Company’s investments in new market tax credits, as passive losses increased $0.5 million during the third quarter of 2013 and $2.3 million on a year-to-date basis. The Company also incurred a provision for clawback of its FDIC indemnification asset based on its estimate of amounts potentially owed to the FDIC of $0.7 million and $0.8 million for the quarter-to-date and year-to-date periods of 2013, respectively.

Income Taxes

For the quarterly periods ended September 30, 2013 and 2012, the Company recorded income tax expense of $7.4 million and $8.1 million, respectively. The Company’s effective tax rate for those periods was 24.1% and 27.7%, respectively. For the nine months ended September 30, 2013, the Company recorded income tax expense of $6.7 million and $19.7 million for the comparable period in 2012, or an effective income tax rate of 14.5% thus far in 2013 and 27.0% for the nine months of 2012. 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 part of the amortization of acquisition intangibles, and various tax credits. For the nine-month period in the current year, the Company’s income tax rate was also positively affected by the impairment of the FDIC loss share receivable, the prepayment penalty recorded on the repayment of

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FHLB debt, and the impairment recorded on closing branches discussed further in the “Executive Overview” discussion above. As a result of these charges, the Company’s annualized income before taxes, and by extension its taxable income, was lower than in previous periods. The tax benefit of these infrequent items, $13.6 million, 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 29.7% for the first nine months of 2013, compared to 31.3% for the same period of 2012. On a consolidated basis, the effective tax rate excluding these charges was 23.8% for the nine months ended September 30, 2013 and 27.3% for the same nine-month period of 2012. The Company’s consolidated effective tax rates were also positively impacted by the Company’s ICP subsidiary, as well as the holding company, as these entities had income tax benefits during the periods from net losses. The effective tax rate on these entities is higher than IBERIABANK’s effective tax rate (which is affected by the various tax credits).

The consolidated effective tax rate in 2013 has decreased when compared to the third quarter of 2012. The difference in the effective tax rates for the periods presented 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 lower than in 2012 as a result of the effect of the change in IBERIABANK’s effective tax rate discussed above.

LIQUIDITY AND OTHER OFF-BALANCE SHEET ACTIVITIES

The Company’s liquidity, represented by cash and cash equivalents, as well as available off balance sheet borrowing sources, is a product of its operating, investing and financing activities. 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. The primary sources of funds for the Company are deposits, borrowings, repayments and maturities of loans and investment securities, securities sold under agreements to repurchase, as well as funds provided from operations and, to a lesser extent, off balance sheet borrowing sources. Certificates of deposit scheduled to mature in one year or less at September 30, 2013 totaled $1.4 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 $2.1 billion in the investment securities portfolio, $736.0 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 continues to experience significant cash inflows on a regular basis. See Note 15 to the unaudited consolidated financial statements for additional discussion related to the Company’s funding requirements.

Net cash outflows totaled $417.5 million during the first nine months of 2013, a decrease of $467.3 million from net cash inflows of $49.8 million during the nine months ended September 30, 2012.

The following table summarizes the Company’s cash flows for the nine months ended September 30 for the periods indicated.

TABLE 24 - CASH FLOW ACTIVITY BY TYPE

(Dollars in thousands)	2013			2012
Cash flow provided by operations	$	276,270		$	44,025
Cash flow used in investing activities		(684,947	)		(338,649	)
Cash flow (used in) provided by financing activities		(8,852	)		344,394
Net (decrease) increase in cash and cash equivalents	$	(417,529	)	$	49,770

The Company had operating cash inflow of $276.3 million for the nine months ended September 30, 2013, $232.2 million more than cash provided by operations for the same period of 2012. Operating cash flow in the current year was positively impacted by an increase in the net proceeds received from mortgage loan sales of $216.9 million, but was negatively impacted by a decrease in net income and cash used to purchase other assets.

Cash flow used in investing activities increased $346.3 million thus far in 2013 when compared to the same period of 2012. A decrease in net cash flow from investment securities primarily drove the decrease in cash flow from the first nine months of 2012. Net cash flow from investment security activity decreased $312.0 million thus far in 2013 as a result of increased security purchases and lower sales and maturities of securities in 2013. The Company also had a decrease of $58.3 million in reimbursements from the FDIC and acquired $32.4 million in cash from the FGB acquisition in 2012, both of which positively impacted cash flow in the prior year. Investing cash activity, however, was positively affected thus far in 2013 by a decrease of $34.9 million in loans funded.

Net financing cash flows decreased $353.2 million during the first nine months of 2013 when compared to 2012, primarily due to a decrease in cash from customer deposits that results in a $136.4 million difference in net deposit cash flow between the two periods. Net cash outflow of $185.6 million from short-term borrowings and long-term debt in 2013 was $260.3 million higher than during the first nine months of 2012 and also had a negative impact on cash flow in the current year.

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Based on its available cash at September 30, 2013 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.

While scheduled cash flows from the amortization and maturities of loans and securities are relatively predictable sources of funds, 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, 2013, the Company had $93.3 million of outstanding long-term FHLB advances. There were no short-term FHLB advances outstanding at September 30, 2013. Additional FHLB advances available at September 30, 2013 amounted to $2.2 billion. The Company and IBERIABANK also have various funding arrangements with commercial banks providing up to $130.0 million in the form of federal funds and other lines of credit. At September 30, 2013, 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. 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 meet its ongoing commitments and fund loan commitments. The Company has been able to generate sufficient cash through its deposits and borrowings, and anticipates it will continue to have sufficient funds to meet its ongoing liquidity requirements.

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 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.

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, 2013, 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.

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TABLE 25 - CHANGE IN NET INTEREST INCOME FROM INTEREST RATE CHANGES

Shift in Interest Rates (in bps)	% Change in Projected Net Interest Income
+ 200		7.3	%
+ 100		3.5	%
- 100		(1.6	)%
- 200		(3.8	)%

The influence of using the forward curve as of September 30, 2013 as a basis for projecting the interest rate environment would approximate a 0.9% 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 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 2013 and will 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.

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TABLE 26 - REPRICING OF CERTAIN EARNING ASSETS

(Dollars in thousands)	4Q 2013		1Q 2014		2Q 2014		3Q 2014		Total less than one year
Investment securities	$	77,733	$	76,422	$	79,594	$	81,820	$	315,569
Covered loans		292,801		101,286		106,931		92,548		593,566
Non-covered loans:
Fixed rate loans		262,467		235,851		233,304		213,814		945,436
Variable rate loans		3,656,595		21,921		12,664		9,760		3,700,940
Total non-covered loans		3,919,062		257,772		245,968		223,574		4,646,376
Total loans		4,211,863		359,058		352,899		316,122		5,239,942
	$	4,289,596	$	435,480	$	432,493	$	397,942	$	5,555,511

Note: Amounts exclude the repricing of assets and liabilities from prior periods, as well as covered loans, 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, 2013, $4.3 billion, or 48.5%, of the Company’s total loan portfolio had adjustable interest rates. IBERIABANK had no significant concentration to any single loan component or industry segment at September 30, 2013.

The Company’s strategy with respect to liabilities in recent periods has been to emphasize transaction accounts, particularly noninterest or low interest-bearing transaction accounts, which are significantly less sensitive to changes in interest rates. At September 30, 2013, 83.0% of the Company’s deposits were in transaction and limited-transaction accounts, compared to 80.0% at December 31, 2012. Noninterest- bearing transaction accounts totaled 23.1% of total deposits at September 30, 2013, compared to 18.3% of total deposits at December 31, 2012.

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

TABLE 27 – REPRICING OF LIABILITIES

(Dollars in thousands)	4Q 2013		1Q 2014		2Q 2014		3Q 2014		Total less than one year
Time deposits	$	690,361		418,821		324,208		200,981	$	1,634,371
Short-term borowings		258,850		—		—		—		258,850
Long-term debt		120,823		587		5,565		13,040		140,015
	$	1,070,034	$	419,408	$	329,773	$	214,021	$	2,033,236

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 2013.

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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, 2012 in Part II, Item 7A of the Company’s Annual Report on Form 10-K, filed with the Securities and Exchange Commission on March 1, 2013. Additional information at September 30, 2013 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, 2013 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 15 – 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, 2012 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.

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

We are continuing to implement a number of expense reduction and revenue enhancing initiatives that, fully implemented, are currently expected to result in estimated annual incremental run-rate benefits of approximately $20.7 million on a pre-tax basis. While many of the elements necessary to achieve these initiatives are within our control, others such as interest rates and prevailing economic conditions, which influence expenses and revenues, depend on external factors not within our control, and there can be no assurance that such external factors will not materially adversely affect our ability to fully implement and accomplish these initiatives.

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 12, 2013	By:	/s/ Daryl G. Byrd
	Daryl G. Byrd
	President and Chief Executive Officer
Date: November 12, 2013	By:	/s/ Anthony J. Restel
	Anthony J. Restel
	Senior Executive Vice President and Chief Financial Officer

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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 12, 2013	/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 12, 2013	/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, 2013 (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 12, 2013

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, 2013 (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 12, 2013

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request. The information furnished herein shall not be deemed to be filed for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933.

XML

Share-Based Compensation - Unvested Restricted Stock Award Activity (Detail)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Balance at beginning of period	538,202	512,112
Granted	166,223	174,393
Forfeited	(27,483)	(8,736)
Earned and issued	(136,629)	(120,644)
Balance at end of period	540,313	557,125

XML

Derivative Instruments and Other Hedging Activities - Schedule of Outstanding Derivative Instruments (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Derivative Instruments And Hedging Activities [Line Items]
Derivative Asset, Fair Value	$ 26,177	$ 35,202
Derivative Liability, Fair Value	14,312	27,783
Derivative Asset, Notional Amount	751,177	1,010,357
Derivative Liability, Notional Amount	826,375	648,690
Designated as Hedging Instruments [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative Asset, Notional Amount		35,000
Derivative Liability, Notional Amount		35,000
Not Designated as Hedging Instruments [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative Asset, Notional Amount	751,177	975,357
Derivative Liability, Notional Amount	826,375	613,690
Other Assets [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative Asset, Fair Value	32,469	42,119
Other Assets [Member] | Designated as Hedging Instruments [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative Asset, Fair Value		499
Other Assets [Member] | Not Designated as Hedging Instruments [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative Asset, Fair Value	32,469	41,620
Other Liabilities [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative Liability, Fair Value	31,521	36,890
Other Liabilities [Member] | Designated as Hedging Instruments [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative Liability, Fair Value		1,843
Other Liabilities [Member] | Not Designated as Hedging Instruments [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative Liability, Fair Value	31,521	35,047
Interest Rate Contracts [Member] | Designated as Hedging Instruments [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative Asset, Notional Amount		35,000
Derivative Liability, Notional Amount		35,000
Interest Rate Contracts [Member] | Not Designated as Hedging Instruments [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative Asset, Notional Amount	376,374	374,536
Derivative Liability, Notional Amount	376,374	374,536
Interest Rate Contracts [Member] | Other Assets [Member] | Designated as Hedging Instruments [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative Asset, Fair Value		499
Interest Rate Contracts [Member] | Other Assets [Member] | Not Designated as Hedging Instruments [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative Asset, Fair Value	14,312	25,940
Interest Rate Contracts [Member] | Other Liabilities [Member] | Designated as Hedging Instruments [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative Liability, Fair Value		1,843
Interest Rate Contracts [Member] | Other Liabilities [Member] | Not Designated as Hedging Instruments [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative Liability, Fair Value	14,312	25,940
Forward Sale Contracts [Member] | Not Designated as Hedging Instruments [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative Asset, Notional Amount	8,218	212,028
Derivative Liability, Notional Amount	253,051	53,269
Forward Sale Contracts [Member] | Other Assets [Member] | Not Designated as Hedging Instruments [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative Asset, Fair Value	148	2,774
Forward Sale Contracts [Member] | Other Liabilities [Member] | Not Designated as Hedging Instruments [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative Liability, Fair Value	5,289	343
Written and Purchased Options [Member] | Not Designated as Hedging Instruments [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative Asset, Notional Amount	366,585	388,793
Derivative Liability, Notional Amount	196,950	185,885
Written and Purchased Options [Member] | Other Assets [Member] | Not Designated as Hedging Instruments [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative Asset, Fair Value	18,009	12,906
Written and Purchased Options [Member] | Other Liabilities [Member] | Not Designated as Hedging Instruments [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative Liability, Fair Value	$ 11,920	$ 8,764

XML

Derivative Instruments and Other Hedging Activities - Reconciliation of Gross Amounts in Consolidated Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Derivative Instruments And Hedging Activities [Line Items]
Derivative assets subject to master netting arrangements, Gross Amounts	$ 26,177	$ 35,202
Derivative liabilities subject to master netting arrangements, Gross Amounts	14,312	27,783
Derivative assets subject to master netting arrangements, Gross Amounts Not Offset	26,177	34,703
Derivative liabilities subject to master netting arrangements, Gross Amounts Not Offset	8,654	13,934
Derivatives [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative assets subject to master netting arrangements, Gross Amounts Not Offset		(499)
Derivative liabilities subject to master netting arrangements, Gross Amounts Not Offset		(499)
Collateral [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative assets subject to master netting arrangements, Gross Amounts Not Offset
Derivative liabilities subject to master netting arrangements, Gross Amounts Not Offset	(5,658)	(13,350)
Interest Rate Contracts [Member] | Designated as Hedging Instruments [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative assets subject to master netting arrangements, Gross Amounts		499
Derivative liabilities subject to master netting arrangements, Gross Amounts		1,843
Derivative assets subject to master netting arrangements, Gross Amounts Not Offset
Derivative liabilities subject to master netting arrangements, Gross Amounts Not Offset		1,344
Interest Rate Contracts [Member] | Not Designated as Hedging Instruments [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative assets subject to master netting arrangements, Gross Amounts	14,312	25,940
Derivative liabilities subject to master netting arrangements, Gross Amounts	14,312	25,940
Derivative assets subject to master netting arrangements, Gross Amounts Not Offset	14,312	25,940
Derivative liabilities subject to master netting arrangements, Gross Amounts Not Offset	8,654	12,590
Interest Rate Contracts [Member] | Derivatives [Member] | Designated as Hedging Instruments [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative assets subject to master netting arrangements, Gross Amounts Not Offset		(499)
Derivative liabilities subject to master netting arrangements, Gross Amounts Not Offset		(499)
Interest Rate Contracts [Member] | Derivatives [Member] | Not Designated as Hedging Instruments [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative assets subject to master netting arrangements, Gross Amounts Not Offset
Derivative liabilities subject to master netting arrangements, Gross Amounts Not Offset
Interest Rate Contracts [Member] | Collateral [Member] | Designated as Hedging Instruments [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative assets subject to master netting arrangements, Gross Amounts Not Offset
Derivative liabilities subject to master netting arrangements, Gross Amounts Not Offset
Interest Rate Contracts [Member] | Collateral [Member] | Not Designated as Hedging Instruments [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative assets subject to master netting arrangements, Gross Amounts Not Offset
Derivative liabilities subject to master netting arrangements, Gross Amounts Not Offset	(5,658)	(13,350)
Written and Purchased Options [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative assets subject to master netting arrangements, Gross Amounts	11,865	8,763
Derivative assets subject to master netting arrangements, Gross Amounts Not Offset	11,865	8,763
Written and Purchased Options [Member] | Derivatives [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative assets subject to master netting arrangements, Gross Amounts Not Offset
Written and Purchased Options [Member] | Collateral [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative assets subject to master netting arrangements, Gross Amounts Not Offset

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Fair Value Measurements - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities, Assets	$ 1,964,389	$ 1,745,004
Fair Value, Measurements, Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities, Assets	1,964,389	1,745,004
Derivative instruments, Assets	32,469	42,119
Total, Assets	1,996,858	1,787,123
Derivative instruments, Liabilities	31,521	36,890
Total, Liabilities	31,521	36,890
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities, Assets	15,220
Derivative instruments, Assets
Total, Assets	15,220
Derivative instruments, Liabilities
Total, Liabilities
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities, Assets	1,949,169	1,745,004
Derivative instruments, Assets	32,469	42,119
Total, Assets	1,981,638	1,787,123
Derivative instruments, Liabilities	31,521	36,890
Total, Liabilities	31,521	36,890
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities, Assets
Derivative instruments, Assets
Total, Assets
Derivative instruments, Liabilities
Total, Liabilities

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Goodwill and Other Acquired Intangible Assets

9 Months Ended

Sep. 30, 2013

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 for the year ended December 31, 2012 and the nine months ended September 30, 2013 are provided in the following table.

(Dollars in thousands)
Balance, December 31, 2011	$	369,811
Goodwill acquired during the year		32,420
Goodwill adjustment to correct an immaterial error		(359	)
Balance, December 31, 2012		401,872
Goodwill acquired during the period		—
Balance, September 30, 2013	$	401,872

The goodwill acquired during the year ended December 31, 2012 was a result of the Florida Gulf acquisition.

The goodwill adjustment in 2012 was a result of the Company’s revised goodwill recorded on its OMNI and Cameron acquisitions. The Company has recorded the adjustment to account for the impact of an immaterial error in accounting for its OMNI and Cameron acquisitions that resulted in a decrease in goodwill of $359,000. The Company revised its valuation of acquired deferred tax assets and property during the first quarter of 2012 as a result of information that existed at the acquisition date but was not available during the prior period. The error was identified in 2012 through the operation of the Company’s internal controls over financial reporting as it related to the Company’s acquisition accounting.

The Company performed the required annual goodwill impairment test as of October 1, 2012. The Company’s annual impairment test did not indicate impairment at any of the Company’s reporting units as of the testing date. The Company is in the process of performing its annual goodwill impairment test as of October 1, 2013.

Prior to 2011, the Company recognized goodwill impairment of $9,681,000 at the Company’s LTC subsidiary based on a decrease in operating revenue and income, which resulted in the conclusion that the fair value of LTC may have been reduced below its carrying amount.

Title plant

The Company held title plant assets totaling $6,722,000 at September 30, 2013 and December 31, 2012, respectively. No events or changes in circumstances occurred during 2013 or 2012 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 for the periods indicated:

	September 30, 2013							December 31, 2012
(Dollars in thousands)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Core deposit intangibles	$	45,406	$	(29,659	)	$	15,747	$	45,406	$	(26,284	)	$	19,122
Customer relationship intangible asset		1,348		(579	)		769		1,348		(410	)		938
	$	46,754	$	(30,238	)	$	16,516	$	46,754	$	(26,694	)	$	20,060

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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, 2013	Dec. 31, 2012
Investments Debt And Equity Securities [Abstract]
Federal Home Loan Bank (FHLB) stock	$ 12,759	$ 16,860
Federal Reserve Bank (FRB) stock	28,098	28,155
Other investments	1,306	1,201
Total equity securities	$ 42,163	$ 46,216

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Consolidated Statements of Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Interest and Dividend Income
Loans, including fees	$ 120,035	$ 133,397	$ 358,344	$ 382,212
Mortgage loans held for sale, including fees	1,289	1,466	3,965	3,747
Investment securities:
Taxable interest	7,837	8,133	22,241	26,745
Tax-exempt interest	1,649	1,809	5,082	5,589
Amortization of FDIC loss share receivable	(22,875)	(33,488)	(68,707)	(89,899)
Other	577	634	2,180	2,028
Total interest and dividend income	108,512	111,951	323,105	330,422
Interest Expense
NOW and MMDA	4,441	5,863	14,462	17,942
Savings	71	154	238	459
Time deposits	4,012	5,530	13,038	19,755
Short-term borrowings	104	197	365	507
Long-term debt	2,432	3,481	8,196	9,999
Total interest expense	11,060	15,225	36,299	48,662
Net interest income	97,452	96,726	286,806	281,760
Provision for loan losses	2,014	4,053	445	15,805
Net interest income after provision for loan losses	95,438	92,673	286,361	265,955
Noninterest Income
Service charges on deposit accounts	7,512	6,952	21,415	19,557
Mortgage income	15,202	23,215	51,841	55,118
Title revenue	5,482	5,623	16,199	15,495
ATM/debit card fee income	2,476	2,377	7,017	6,566
Income from bank owned life insurance	908	916	2,747	2,771
Gain (loss) on sale of available for sale investments	(3)	41	2,259	3,743
Derivative losses reclassified from other comprehensive income		(409)	(392)	(1,195)
Broker commissions	3,950	3,092	11,347	9,254
Other income	7,736	4,746	17,809	14,334
Total noninterest income	43,263	46,553	130,242	125,643
Noninterest Expense
Salaries and employee benefits	59,234	59,938	185,578	172,878
Net occupancy and equipment	14,572	13,869	44,050	39,496
Impairment of FDIC loss share receivables and other long-lived assets	1,319		37,750	2,743
Franchise and shares tax	911	1,023	2,986	3,664
Communication and delivery	2,899	3,152	9,286	9,424
Marketing and business development	2,350	2,189	8,486	7,964
Data processing	4,837	4,931	13,093	11,537
Printing, stationery and supplies	581	848	2,004	2,523
Amortization of acquisition intangibles	1,179	1,287	3,543	3,865
Professional services	4,156	5,947	13,675	15,665
Costs of OREO property, net	(359)	270	980	4,453
Credit and other loan related expense	5,248	4,846	13,155	13,709
Insurance	3,125	2,615	8,408	7,745
Travel and entertainment	1,912	2,398	6,199	7,158
Other expenses	6,188	6,535	21,217	15,920
Total noninterest expense	108,152	109,848	370,410	318,744
Income before income tax expense	30,549	29,378	46,193	72,854
Income tax expense	7,357	8,144	6,694	19,667
Net Income	23,192	21,234	39,499	53,187
Income Available to Common Shareholders - Basic	23,192	21,234	39,499	53,187
Earnings Allocated to Unvested Restricted Stock	(425)	(406)	(744)	(1,007)
Earnings Available to Common Shareholders - Diluted	22,767	20,828	38,755	52,180
Earnings per common share - Basic	$ 0.78	$ 0.73	$ 1.34	$ 1.81
Earnings per common share - Diluted	$ 0.78	$ 0.73	$ 1.33	$ 1.81
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	5,528	6,099	(38,769)	8,236
Less: reclassification adjustment for gains (losses) included in net income	3	(41)	(2,259)	(3,743)
Unrealized (loss) gain on securities, before tax	5,531	6,058	(41,028)	4,493
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		800	952	(1,882)
Less: reclassification adjustment for losses (gains) included in net income		409	392	1,195
Fair value of derivative instruments designated as cash flow hedges, before tax		1,209	1,344	(687)
Other comprehensive income (loss), before tax	5,531	7,267	(39,684)	3,806
Income tax expense (benefit) related to items of other comprehensive income (loss)	1,936	2,543	(13,890)	1,332
Other comprehensive income (loss), net of tax	3,595	4,724	(25,794)	2,474
Comprehensive income	$ 26,787	$ 25,958	$ 13,705	$ 55,661

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Earnings Per Share

9 Months Ended

Sep. 30, 2013

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 Three Months Ended September 30						For the Nine Months Ended September 30
(Dollars in thousands, except per share data)	2013			2012			2013			2012
Income available to common shareholders	$	23,192		$	21,234		$	39,499		$	53,187
Distributed earnings to unvested restricted stock		(421	)		(401	)		(744	)		(1,009	)
Distributed earnings to common shareholders - basic		22,771			20,833			38,755			52,178
Undistributed earnings reallocated to unvested restricted stock		(4	)		(5	)		—			2
Distributed and undistributed earnings to common shareholders - diluted	$	22,767		$	20,828		$	38,755		$	52,180
Weighted average shares outstanding - basic (1)		29,631,799			29,066,000			29,582,081			29,303,849
Weighted average shares outstanding - diluted		29,147,232			28,548,432			29,062,238			28,812,631
Earnings per common share - basic	$	0.78		$	0.73		$	1.34		$	1.81
Earnings per common share - diluted		0.78			0.73			1.33			1.81
Earnings per unvested restricted stock share - basic		0.77			0.71			1.33			1.82
Earnings per unvested restricted stock share - diluted		0.78			0.72			1.33			1.82

(1) Weighted average basic shares outstanding include 547,155 and 563,061 shares of unvested restricted stock for the three months ended September 30, 2013 and 2012, respectively, and 559,556 and 554,041 shares for the nine months ended September 30, 2013 and 2012, respectively.

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

	For the Three Months Ended September 30				For the Nine Months Ended September 30
(Dollars in thousands, except per share data)	2013		2012		2013		2012
Distributed earnings to common shareholders	$	9,926	$	9,826	$	29,736	$	29,695
Undistributed earnings to common shareholders		12,845		11,007		9,019		22,483
Total earnings to common shareholders	$	22,771	$	20,833	$	38,755	$	52,178
Distributed earnings to unvested restricted stock	$	183	$	189	$	571	$	574
Undistributed earnings to unvested restricted stock		238		212		173		435
Total earnings allocated to unvested restricted stock	$	421	$	401	$	744	$	1,009
Distributed earnings per common share	$	0.34	$	0.34	$	1.03	$	1.03
Undistributed earnings per common share		0.44		0.39		0.31		0.78
Total earnings per common share - basic	$	0.78	$	0.73	$	1.34	$	1.81
Distributed earnings per unvested restricted stock share	$	0.34	$	0.34	$	1.02	$	1.04
Undistributed earnings per unvested restricted stock share		0.43		0.37		0.31		0.78
Total earnings per unvested restricted stock share - basic	$	0.77	$	0.71	$	1.33	$	1.82

For the three months ended September 30, 2013 and 2012, the calculations for basic shares outstanding exclude the weighted average shares owned by the Recognition and Retention Plan (“RRP”) of 642,764 and 624,000, respectively, and are adjusted for the weighted average shares in treasury stock of 2,189,978 and 2,036,132, respectively. For the nine months ended September 30, 2013 and 2012, basic shares outstanding exclude 645,793 and 611,646 shares owned by the RRP, respectively, and are adjusted for 2,249,068 and 1,801,572 shares, respectively, of weighted average shares of treasury stock.

The effect from the assumed exercise of 402,344 and 834,559 stock options was not included in the computation of diluted earnings per share for three months ended September 30, 2013 and 2012, respectively, because such amounts would have had an antidilutive effect on earnings per common share. For the nine months ended September 30, 2013 and 2012, the effect from the assumed exercise of 678,604 and 703,346 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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Fair Value of Financial Instruments

9 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

NOTE 17 – 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, 2013 and December 31, 2012, weighted for varying maturity dates. Other non-covered loans receivable are valued based on present values using entry-value interest rates at September 30, 2013 and December 31, 2012 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. 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 include 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, 2013 and December 31, 2012 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, 2013 and December 31, 2012, 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, 2013				December 31, 2012
(Dollars in thousands)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Financial Assets
Cash and cash equivalents	$	553,447	$	553,447	$	970,977	$	970,977
Investment securities		2,120,067		2,119,699		1,950,066		1,956,502
Loans and loans held for sale		9,151,322		9,257,560		8,766,054		8,800,563
FDIC loss share receivable		204,885		59,512		423,069		207,222
Derivative instruments		32,469		32,469		42,119		42,119
Accrued interest receivable		31,296		31,296		32,183		32,183
Financial Liabilities
Deposits	$	10,950,764	$	10,533,414	$	10,748,277	$	10,594,885
Short-term borrowings		258,850		258,850		303,045		303,045
Long-term debt		281,101		239,506		423,377		394,490
Derivative instruments		31,521		31,521		36,890		36,890
Accrued interest payable		6,026		6,026		6,615		6,615

The fair value estimates presented herein are based upon pertinent information available to management as of September 30, 2013 and December 31, 2012. 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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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, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 23, 2013	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Recorded Investment					$ 46,283	$ 50,079
Unpaid Principal Balance					46,712	51,071
Related Allowance					(429)	(992)
Average Recorded Investment	50,310	50,702	49,840	52,882
Interest Income Recognized	23	24	136	1,029
Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment					27,942	32,773
Unpaid Principal Balance					27,976	33,448
Related Allowance					(34)	(675)
Average Recorded Investment	31,006	32,938	30,233	36,340
Interest Income Recognized	23	24	89	745
Commercial Loans [Member] | With No Related Allowance Recorded [Member] | Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment					9,392	26,151
Unpaid Principal Balance					9,392	26,151
Related Allowance
Average Recorded Investment	10,703	27,547	12,787	29,872
Interest Income Recognized	6	15	22	651
Commercial Loans [Member] | With No Related Allowance Recorded [Member] | Business [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment					13,068	1,824
Unpaid Principal Balance					13,068	1,824
Related Allowance
Average Recorded Investment	13,218	2,451	8,608	3,387
Interest Income Recognized	17		59	71
Commercial Loans [Member] | With No Related Allowance Recorded [Member] | Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment					263
Unpaid Principal Balance					263
Related Allowance
Commercial Loans [Member] | With An Allowance Recorded [Member] | Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment					2,913	3,464
Unpaid Principal Balance					2,937	3,663
Related Allowance					(24)	(199)
Average Recorded Investment	4,346	2,731	6,092	2,866
Interest Income Recognized		8	5	22
Commercial Loans [Member] | With An Allowance Recorded [Member] | Business [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment					2,569	1,334
Unpaid Principal Balance					2,579	1,810
Related Allowance					(10)	(476)
Average Recorded Investment	2,739	209	2,746	215
Interest Income Recognized		1	3	1
Consumer Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment					8,766	7,445
Unpaid Principal Balance					8,828	7,553
Related Allowance					(62)	(108)
Average Recorded Investment	9,654	8,516	10,227	9,103
Interest Income Recognized			40	136
Consumer Loans [Member] | With No Related Allowance Recorded [Member] | Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	265	225	287	227
Interest Income Recognized
Consumer Loans [Member] | With An Allowance Recorded [Member] | Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment					6,784	5,860
Unpaid Principal Balance					6,829	5,951
Related Allowance					(45)	(91)
Average Recorded Investment	7,244	6,184	7,458	6,502
Interest Income Recognized			14	110
Consumer Loans [Member] | With An Allowance Recorded [Member] | Indirect Automobile [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment					1,050	865
Unpaid Principal Balance					1,056	868
Related Allowance					(6)	(3)
Average Recorded Investment	1,349	1,135	1,610	1,345
Interest Income Recognized			22	20
Consumer Loans [Member] | With An Allowance Recorded [Member] | Credit Card [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment					417	413
Unpaid Principal Balance					425	424
Related Allowance					(8)	(11)
Average Recorded Investment	424	387	426	354
Interest Income Recognized
Consumer Loans [Member] | With An Allowance Recorded [Member] | Consumer - Other [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment					252	307
Unpaid Principal Balance					255	310
Related Allowance					(3)	(3)
Average Recorded Investment	372	585	446	675
Interest Income Recognized			4	6
Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment					9,575	9,861
Unpaid Principal Balance					9,908	10,070
Related Allowance					(333)	(209)
Average Recorded Investment	9,650	9,248	9,380	7,439
Interest Income Recognized			7	148
Mortgage Loans [Member] | With An Allowance Recorded [Member] | Residential Prime [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment					9,575	9,861
Unpaid Principal Balance					9,908	10,070
Related Allowance					(333)	(209)
Average Recorded Investment	9,650	9,248	9,380	7,439
Interest Income Recognized			$ 7	$ 148

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Loans Receivable - Schedule of Aging of Non-Covered Loans (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Non-Covered Loans Excluding Acquired Loans [Member]
Loans Receivable [Line Items]
Past Due, 30-59 days	$ 8,525	$ 10,345
Past Due, 60-89 days	3,881	2,447
Past Due, Greater than 90 days	45,256	49,288
Total past due	57,662	62,080
Current	7,661,911	6,685,425
Total Non-covered loans, Net of Unearned Income	7,719,573	6,747,505
Recorded investment > 90 days and Accruing	1,418	1,371
Non-Covered Loans Excluding Acquired Loans [Member] | Commercial Loans [Member] | Commercial Real Estate Construction [Member]
Loans Receivable [Line Items]
Past Due, 30-59 days		60
Past Due, 60-89 days
Past Due, Greater than 90 days	2,430	5,479
Total past due	2,430	5,539
Current	380,665	288,137
Total Non-covered loans, Net of Unearned Income	383,095	293,676
Recorded investment > 90 days and Accruing
Non-Covered Loans Excluding Acquired Loans [Member] | Commercial Loans [Member] | Commercial Real Estate - Other [Member]
Loans Receivable [Line Items]
Past Due, 30-59 days	1,933	3,590
Past Due, 60-89 days
Past Due, Greater than 90 days	9,639	23,559
Total past due	11,572	27,149
Current	2,556,798	2,224,495
Total Non-covered loans, Net of Unearned Income	2,568,370	2,251,644
Recorded investment > 90 days and Accruing	151	83
Non-Covered Loans Excluding Acquired Loans [Member] | Commercial Loans [Member] | Commercial Business [Member]
Loans Receivable [Line Items]
Past Due, 30-59 days	1,743	1,430
Past Due, 60-89 days	6	13
Past Due, Greater than 90 days	14,591	3,687
Total past due	16,340	5,130
Current	2,573,065	2,362,304
Total Non-covered loans, Net of Unearned Income	2,589,405	2,367,434
Recorded investment > 90 days and Accruing		329
Non-Covered Loans Excluding Acquired Loans [Member] | Residential Mortgage Loans [Member] | Residential Prime [Member]
Loans Receivable [Line Items]
Past Due, 30-59 days	517	662
Past Due, 60-89 days	2,297	1,156
Past Due, Greater than 90 days	9,326	9,168
Total past due	12,140	10,986
Current	261,615	185,843
Total Non-covered loans, Net of Unearned Income	273,755	196,829
Recorded investment > 90 days and Accruing	1,267	801
Non-Covered Loans Excluding Acquired Loans [Member] | Residential Mortgage Loans [Member] | Residential Subprime [Member]
Loans Receivable [Line Items]
Past Due, 30-59 days
Past Due, 60-89 days
Past Due, Greater than 90 days	442
Total past due	442
Current	115,715	60,454
Total Non-covered loans, Net of Unearned Income	116,157	60,454
Recorded investment > 90 days and Accruing
Non-Covered Loans Excluding Acquired Loans [Member] | Consumer and Other Loans [Member] | Home Equity [Member]
Loans Receivable [Line Items]
Past Due, 30-59 days	1,745	2,283
Past Due, 60-89 days	577	796
Past Due, Greater than 90 days	7,092	5,793
Total past due	9,414	8,872
Current	1,063,257	991,766
Total Non-covered loans, Net of Unearned Income	1,072,671	1,000,638
Recorded investment > 90 days and Accruing		158
Non-Covered Loans Excluding Acquired Loans [Member] | Consumer and Other Loans [Member] | Indirect Automobile [Member]
Loans Receivable [Line Items]
Past Due, 30-59 days	1,719	1,624
Past Due, 60-89 days	439	326
Past Due, Greater than 90 days	1,056	868
Total past due	3,214	2,818
Current	364,094	320,148
Total Non-covered loans, Net of Unearned Income	367,308	322,966
Recorded investment > 90 days and Accruing
Non-Covered Loans Excluding Acquired Loans [Member] | Consumer and Other Loans [Member] | Credit Card [Member]
Loans Receivable [Line Items]
Past Due, 30-59 days	184	130
Past Due, 60-89 days	102	51
Past Due, Greater than 90 days	425	424
Total past due	711	605
Current	59,225	51,117
Total Non-covered loans, Net of Unearned Income	59,936	51,722
Recorded investment > 90 days and Accruing
Non-Covered Loans Excluding Acquired Loans [Member] | Consumer and Other Loans [Member] | Consumer - Other [Member]
Loans Receivable [Line Items]
Past Due, 30-59 days	684	566
Past Due, 60-89 days	460	105
Past Due, Greater than 90 days	255	310
Total past due	1,399	981
Current	287,477	201,161
Total Non-covered loans, Net of Unearned Income	288,876	202,142
Recorded investment > 90 days and Accruing
Non-Covered Acquired Loans [Member]
Loans Receivable [Line Items]
Past Due, 30-59 days	4,596	10,502
Past Due, 60-89 days	1,172	2,499
Past Due, Greater than 90 days	44,778	52,781
Total past due	50,546	65,782
Current	535,401	675,692
Discount	(69,485)	(83,155)
Total Non-covered loans, Net of Unearned Income	516,462	658,319
Recorded investment > 90 days and Accruing	44,778	52,781
Non-Covered Acquired Loans [Member] | Commercial Loans [Member] | Commercial Real Estate Construction [Member]
Loans Receivable [Line Items]
Past Due, 30-59 days	97	369
Past Due, 60-89 days
Past Due, Greater than 90 days	3,457	4,067
Total past due	3,554	4,436
Current	15,020	29,098
Discount	(1,928)	(3,968)
Total Non-covered loans, Net of Unearned Income	16,646	29,566
Recorded investment > 90 days and Accruing	3,457	4,067
Non-Covered Acquired Loans [Member] | Commercial Loans [Member] | Commercial Real Estate - Other [Member]
Loans Receivable [Line Items]
Past Due, 30-59 days	2,240	5,971
Past Due, 60-89 days	438	1,572
Past Due, Greater than 90 days	33,484	38,987
Total past due	36,162	46,530
Current	367,085	426,339
Discount	(51,025)	(57,055)
Total Non-covered loans, Net of Unearned Income	352,222	415,814
Recorded investment > 90 days and Accruing	33,484	38,987
Non-Covered Acquired Loans [Member] | Commercial Loans [Member] | Commercial Business [Member]
Loans Receivable [Line Items]
Past Due, 30-59 days	444	1,410
Past Due, 60-89 days	246	524
Past Due, Greater than 90 days	1,880	3,953
Total past due	2,570	5,887
Current	59,949	89,490
Discount	(8,102)	(12,144)
Total Non-covered loans, Net of Unearned Income	54,417	83,233
Recorded investment > 90 days and Accruing	1,880	3,953
Non-Covered Acquired Loans [Member] | Residential Mortgage Loans [Member] | Residential Prime [Member]
Loans Receivable [Line Items]
Past Due, 30-59 days
Past Due, 60-89 days
Past Due, Greater than 90 days	226	779
Total past due	226	779
Current	20,388	30,663
Discount	(586)	1,315
Total Non-covered loans, Net of Unearned Income	20,028	32,757
Recorded investment > 90 days and Accruing	226	779
Non-Covered Acquired Loans [Member] | Consumer and Other Loans [Member] | Home Equity [Member]
Loans Receivable [Line Items]
Past Due, 30-59 days	1,567	2,379
Past Due, 60-89 days	302	382
Past Due, Greater than 90 days	4,681	4,354
Total past due	6,550	7,115
Current	56,842	73,658
Discount	(4,193)	(4,498)
Total Non-covered loans, Net of Unearned Income	59,199	76,275
Recorded investment > 90 days and Accruing	4,681	4,354
Non-Covered Acquired Loans [Member] | Consumer and Other Loans [Member] | Indirect Automobile [Member]
Loans Receivable [Line Items]
Past Due, 30-59 days	86	171
Past Due, 60-89 days	1	4
Past Due, Greater than 90 days	102	146
Total past due	189	321
Current	2,258	4,698
Discount
Total Non-covered loans, Net of Unearned Income	2,447	5,019
Recorded investment > 90 days and Accruing	102	146
Non-Covered Acquired Loans [Member] | Consumer and Other Loans [Member] | Consumer - Other [Member]
Loans Receivable [Line Items]
Past Due, 30-59 days	162	202
Past Due, 60-89 days	185	17
Past Due, Greater than 90 days	948	495
Total past due	1,295	714
Current	13,859	21,746
Discount	(3,651)	(6,805)
Total Non-covered loans, Net of Unearned Income	11,503	15,655
Recorded investment > 90 days and Accruing	$ 948	$ 495

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Other Real Estate Owned

9 Months Ended

Sep. 30, 2013

Banking And Thrift [Abstract]

Other Real Estate Owned

NOTE 11 – OTHER REAL ESTATE OWNED

Other real estate owned, segregated into non-covered and covered properties, consists of the following as of the periods indicated.

	September 30, 2013						December 31, 2012
(Dollars in thousands)	Non-covered		Covered		Total		Non-covered		Covered		Total
Real estate owned acquired by foreclosure	$	31,261	$	85,616	$	116,877	$	35,080	$	75,784	$	110,864
Real estate acquired for development or resale		10,518		—		10,518		9,199		—		9,199
Other foreclosed property		109		1,483		1,592		14		1,459		1,473
	$	41,888	$	87,099	$	128,987	$	44,293	$	77,243	$	121,536

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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, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense related to restricted stock/phantom stock	$ 2,110	$ 1,973	$ 6,055	$ 5,638
Phantom Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense related to restricted stock/phantom stock	$ 792	$ 245	$ 2,602	$ 1,426

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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, 2013	Dec. 31, 2012
Schedule of Securities Available-for-sale And Held To Maturity [Line Items]
Securities available for sale, Amortized Cost	$ 1,967,293	$ 1,706,916
Securities available for sale, Gross Unrealized Gains	19,795	40,134
Securities available for sale, Gross Unrealized Losses	(22,699)	(2,046)
Securities available for sale, Estimated Fair Value	1,964,389	1,745,004
Securities held to maturity, Amortized Cost	155,678	205,062
Securities held to maturity, Gross Unrealized Gains	2,678	6,702
Securities held to maturity, Gross Unrealized Losses	(3,046)	(266)
Securities held to maturity, Estimated Fair Value	155,310	211,498
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	407,049	281,746
Securities available for sale, Gross Unrealized Gains	1,878	4,364
Securities available for sale, Gross Unrealized Losses	(7,127)	(386)
Securities available for sale, Estimated Fair Value	401,800	285,724
Securities held to maturity, Amortized Cost	34,471	69,949
Securities held to maturity, Gross Unrealized Gains	650	1,244
Securities held to maturity, Gross Unrealized Losses
Securities held to maturity, Estimated Fair Value	35,121	71,193
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	109,509	120,680
Securities available for sale, Gross Unrealized Gains	2,967	6,573
Securities available for sale, Gross Unrealized Losses	(235)	(178)
Securities available for sale, Estimated Fair Value	112,241	127,075
Securities held to maturity, Amortized Cost	84,471	88,909
Securities held to maturity, Gross Unrealized Gains	1,735	4,730
Securities held to maturity, Gross Unrealized Losses	(1,425)	(113)
Securities held to maturity, Estimated Fair Value	84,781	93,526
Mortgage-Backed Securities [Member]
Schedule of Securities Available-for-sale And Held To Maturity [Line Items]
Securities available for sale, Amortized Cost	1,449,275	1,303,030
Securities available for sale, Gross Unrealized Gains	14,928	29,108
Securities available for sale, Gross Unrealized Losses	(15,337)	(1,482)
Securities available for sale, Estimated Fair Value	1,448,866	1,330,656
Securities held to maturity, Amortized Cost	36,736	46,204
Securities held to maturity, Gross Unrealized Gains	293	728
Securities held to maturity, Gross Unrealized Losses	(1,621)	(153)
Securities held to maturity, Estimated Fair Value	35,408	46,779
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	22	89
Securities available for sale, Gross Unrealized Losses
Securities available for sale, Estimated Fair Value	$ 1,482	$ 1,549

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Other Comprehensive Income - 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, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Other Comprehensive Income Loss [Abstract]
Unrealized holding gains/losses arising during the period, Before-Tax Amount	$ 5,528	$ 6,099	$ (38,769)	$ 8,236
Less: reclassification adjustment for losses/gains included in net income, Before-Tax Amount	3	(41)	(2,259)	(3,743)
Net unrealized gains/losses, Before-Tax Amount	5,531	6,058	(41,028)	4,493
Change in fair value of derivative instruments designated as cash flow hedges during the period, Before-Tax Amount		800	952	(1,882)
Less: reclassification adjustment for gains/losses included in net income, Before-Tax Amount		409	392	1,195
Fair value of derivative instruments designated as cash flow hedges, Before-Tax Amount		1,209	1,344	(687)
Total other comprehensive income/loss, Before-Tax Amount	5,531	7,267	(39,684)	3,806
Unrealized holding gains/losses arising during the period, Tax (Expense) Benefit	(1,935)	(2,135)	13,569	(2,883)
Less: reclassification adjustment for gains/losses included in net income, Tax (Expense) Benefit	(1)	14	791	1,310
Net unrealized gains/losses, Tax (Expense) Benefit	(1,936)	(2,121)	14,360	(1,573)
Change in fair value of derivative instruments designated as cash flow hedges during the period, Tax (Expense) Benefit		(280)	(333)	659
Less: reclassification adjustment for gains/losses included in net income, Tax Expense (Benefit)		(142)	(137)	(418)
Fair value of derivative instruments designated as cash flow hedges, Tax (Expense) Benefit		(422)	(470)	241
Total other comprehensive income/loss, Tax Expense (Benefit)	(1,936)	(2,543)	13,890	(1,332)
Unrealized holding gains/losses arising during the period, Net-of-Tax Amount	3,593	3,964	(25,200)	5,353
Less: reclassification adjustment for losses/gains included in net income, Net-of-Tax Amount	2	(27)	(1,468)	(2,433)
Net unrealized gains/losses, Net-of-Tax Amount	3,595	3,937	(26,668)	2,920
Change in fair value of derivative instruments designated as cash flow hedges during the period, Net-of-Tax Amount		520	619	(1,223)
Less: reclassification adjustment for gains/losses included in net income, Net-of-Tax Amount		267	255	777
Fair value of derivative instruments designated as cash flow hedges, Net-of-Tax Amount		787	874	(446)
Total other comprehensive income/loss, Net-of-Tax Amount	$ 3,595	$ 4,724	$ (25,794)	$ 2,474

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Loans Receivable - Schedule of Non-Covered Loans on Nonaccrual Status (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	$ 43,838	$ 47,916
Commercial Loans [Member] | Commercial Real Estate Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	2,430	5,479
Commercial Loans [Member] | Commercial Real Estate - Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	9,488	23,475
Commercial Loans [Member] | Business [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	14,591	3,358
Residential Mortgage Loans [Member] | Residential Prime [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	8,501	8,367
Consumer and Other Loans [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	7,092	5,635
Consumer and Other Loans [Member] | Indirect Automobile [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	1,056	868
Consumer and Other Loans [Member] | Credit Card [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	425	424
Consumer and Other Loans [Member] | Consumer - Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	$ 255	$ 310

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Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2013

Commitments And Contingencies Disclosure [Abstract]

Summary of Financial Instruments Outstanding

The Company had the following financial instruments outstanding, whose contract amounts represent credit risk:

(Dollars in thousands)	September 30 2013		December 31 2012
Commitments to grant loans	$	342,494	$	192,295
Unfunded commitments under lines of credit		2,972,046		2,372,971
Commercial and standby letters of credit		106,652		62,207
Reserve for unfunded lending commitments		11,959		—

XML

Acquisition and Disposition Activity (Tables)

9 Months Ended

Sep. 30, 2013

Text Block [Abstract]

Schedule of Branch Closure Costs

The following table shows the costs the Company incurred that are included in its statements of comprehensive income for the periods indicated.

	For the Three Months Ended September 30					For the Nine Months Ended September 30
(Dollars in thousands)	2013			2012		2013		2012
Employee termination	$	(70	)	$	384	$	299	$	384
Accelerated depreciation		352			284		1,033		284
Contract termination		591			—		591		—
Impairment		323			2,743		4,941		2,743
	$	1,196		$	3,411	$	6,864	$	3,411

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Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2013

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 Three Months Ended September 30						For the Nine Months Ended September 30
(Dollars in thousands, except per share data)	2013			2012			2013			2012
Income available to common shareholders	$	23,192		$	21,234		$	39,499		$	53,187
Distributed earnings to unvested restricted stock		(421	)		(401	)		(744	)		(1,009	)
Distributed earnings to common shareholders - basic		22,771			20,833			38,755			52,178
Undistributed earnings reallocated to unvested restricted stock		(4	)		(5	)		—			2
Distributed and undistributed earnings to common shareholders - diluted	$	22,767		$	20,828		$	38,755		$	52,180
Weighted average shares outstanding - basic (1)		29,631,799			29,066,000			29,582,081			29,303,849
Weighted average shares outstanding - diluted		29,147,232			28,548,432			29,062,238			28,812,631
Earnings per common share - basic	$	0.78		$	0.73		$	1.34		$	1.81
Earnings per common share - diluted		0.78			0.73			1.33			1.81
Earnings per unvested restricted stock share - basic		0.77			0.71			1.33			1.82
Earnings per unvested restricted stock share - diluted		0.78			0.72			1.33			1.82

(1) Weighted average basic shares outstanding include 547,155 and 563,061 shares of unvested restricted stock for the three months ended September 30, 2013 and 2012, respectively, and 559,556 and 554,041 shares for the nine months ended September 30, 2013 and 2012, 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 September 30				For the Nine Months Ended September 30
(Dollars in thousands, except per share data)	2013		2012		2013		2012
Distributed earnings to common shareholders	$	9,926	$	9,826	$	29,736	$	29,695
Undistributed earnings to common shareholders		12,845		11,007		9,019		22,483
Total earnings to common shareholders	$	22,771	$	20,833	$	38,755	$	52,178
Distributed earnings to unvested restricted stock	$	183	$	189	$	571	$	574
Undistributed earnings to unvested restricted stock		238		212		173		435
Total earnings allocated to unvested restricted stock	$	421	$	401	$	744	$	1,009
Distributed earnings per common share	$	0.34	$	0.34	$	1.03	$	1.03
Undistributed earnings per common share		0.44		0.39		0.31		0.78
Total earnings per common share - basic	$	0.78	$	0.73	$	1.34	$	1.81
Distributed earnings per unvested restricted stock share	$	0.34	$	0.34	$	1.02	$	1.04
Undistributed earnings per unvested restricted stock share		0.43		0.37		0.31		0.78
Total earnings per unvested restricted stock share - basic	$	0.77	$	0.71	$	1.33	$	1.82

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Earnings Per Share - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]
Weighted average number of shares, Recognition and Retention Plan	642,764	624,000	645,793	611,646
Weighted average number of shares, treasury stock	2,189,978	2,036,132	2,249,068	1,801,572
Stock options having antidilutive effect on earnings per share	402,344	834,559	678,604	703,346

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Other Real Estate Owned (Tables)

9 Months Ended

Sep. 30, 2013

Banking And Thrift [Abstract]

Schedule of Other Real Estate Owned Segregated Into Non-Covered and Covered Properties

Other real estate owned, segregated into non-covered and covered properties, consists of the following as of the periods indicated.

	September 30, 2013						December 31, 2012
(Dollars in thousands)	Non-covered		Covered		Total		Non-covered		Covered		Total
Real estate owned acquired by foreclosure	$	31,261	$	85,616	$	116,877	$	35,080	$	75,784	$	110,864
Real estate acquired for development or resale		10,518		—		10,518		9,199		—		9,199
Other foreclosed property		109		1,483		1,592		14		1,459		1,473
	$	41,888	$	87,099	$	128,987	$	44,293	$	77,243	$	121,536

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Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2013

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, 2013				December 31, 2012
(Dollars in thousands)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Financial Assets
Cash and cash equivalents	$	553,447	$	553,447	$	970,977	$	970,977
Investment securities		2,120,067		2,119,699		1,950,066		1,956,502
Loans and loans held for sale		9,151,322		9,257,560		8,766,054		8,800,563
FDIC loss share receivable		204,885		59,512		423,069		207,222
Derivative instruments		32,469		32,469		42,119		42,119
Accrued interest receivable		31,296		31,296		32,183		32,183
Financial Liabilities
Deposits	$	10,950,764	$	10,533,414	$	10,748,277	$	10,594,885
Short-term borrowings		258,850		258,850		303,045		303,045
Long-term debt		281,101		239,506		423,377		394,490
Derivative instruments		31,521		31,521		36,890		36,890
Accrued interest payable		6,026		6,026		6,615		6,615

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Investment Securities - Additional Information (Detail) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2013 Security	Dec. 31, 2012 Bonds Security	Dec. 31, 2011
Schedule of Securities Available-for-sale And Held To Maturity [Line Items]
Pledged securities, carrying values	$ 1,400,000,000	$ 1,700,000,000
Number of debt securities, held	151	49
Unrealized losses on debt securities, percent of amortized cost	2.41%	0.85%
Unrealized losses on debt securities, percent of Company's total amortized cost	1.21%	0.12%
Number of debt securities having unrealized losses	151	49
Number of securities recorded with an aggregate amortized cost	13	3
Number of securities, continuous unrealized loss position, twelve months or longer, fair value	13	3
Available-for-sale securities, amortized cost basis	53,886,000	5,200,000
Unrealized loss on securities	$ 2,354,000	$ 187,000
Unrated revenue municipal bond		1
Impairment of par value bond, percentage			50.00%
Rated AAA by Fannie Mae Freddie Mac and Ginnie Mae Securities [Member]
Schedule of Securities Available-for-sale And Held To Maturity [Line Items]
Number of securities issued	13
Rated AAA by Fannie Mae Freddie Mac and Ginnie Mae Securities [Member] | Maximum [Member]
Schedule of Securities Available-for-sale And Held To Maturity [Line Items]
Number of securities issued	10	3
Rated AAA by Fannie Mae Freddie Mac and Ginnie Mae Securities [Member] | Minimum [Member]
Schedule of Securities Available-for-sale And Held To Maturity [Line Items]
Number of securities issued		2

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Loss Sharing Agreements and FDIC Loss Share Receivable (Tables)

9 Months Ended

Sep. 30, 2013

Text Block [Abstract]

Schedule of FDIC Loss Share Receivable

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

	September 30
(Dollars in thousands)	2013			2012
Balance at beginning of period	$	423,069		$	591,844
Change due to (reversal of) credit loss provision recorded on FDIC covered loans		(58,565	)		33,786
Amortization		(68,707	)		(89,899	)
Submission of reimbursable losses to the FDIC		(44,910	)		(97,511	)
Impairment		(31,813	)		—
Changes due to a change in cash flow assumptions on OREO and other		(14,189	)		(7,053	)
Balance at end of period	$	204,885		$	431,167

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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, 2013	Sep. 30, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	$ 251,603	$ 193,761
(Reversal of) Provision for loan losses before benefit attributable to FDIC loss share agreements	(58,120)	49,591
Adjustment attributable to FDIC loss share arrangements	58,565	(33,786)
Net (reversal of) provision for loan losses	445	15,805
Increase (Decrease) in FDIC loss share receivable	(58,565)	33,786
Transfer of balance to OREO	(30,315)	(24,177)
Transfer of balance to the RULC	(9,828)
Loans charged-off	(9,148)	(20,280)
Recoveries	4,353	2,492
Balance at end of period	148,545	201,387
Balance at beginning of period
Transfer of balance from the allowance for loan losses	9,828
Provision for unfunded lending commitments	2,131
Balance at end of period	11,959
Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	74,211	74,861
(Reversal of) Provision for loan losses before benefit attributable to FDIC loss share agreements	2,884	6,518
Adjustment attributable to FDIC loss share arrangements
Net (reversal of) provision for loan losses	2,884	6,518
Increase (Decrease) in FDIC loss share receivable
Transfer of balance to OREO
Transfer of balance to the RULC	(9,828)
Loans charged-off	(7,455)	(6,818)
Recoveries	4,353	2,455
Balance at end of period	64,165	77,016
Balance at beginning of period
Transfer of balance from the allowance for loan losses	9,828
Provision for unfunded lending commitments	2,131
Balance at end of period	11,959
Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	8,816
(Reversal of) Provision for loan losses before benefit attributable to FDIC loss share agreements	(2,464)	5,805
Adjustment attributable to FDIC loss share arrangements
Net (reversal of) provision for loan losses	(2,464)	5,805
Increase (Decrease) in FDIC loss share receivable
Transfer of balance to OREO	(1,013)	(408)
Transfer of balance to the RULC
Loans charged-off	(10)	(179)
Recoveries		18
Balance at end of period	5,329	5,236
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	168,576	118,900
(Reversal of) Provision for loan losses before benefit attributable to FDIC loss share agreements	(58,540)	37,268
Adjustment attributable to FDIC loss share arrangements	58,565	(33,786)
Net (reversal of) provision for loan losses	25	3,482
Increase (Decrease) in FDIC loss share receivable	(58,565)	33,786
Transfer of balance to OREO	(29,302)	(23,769)
Transfer of balance to the RULC
Loans charged-off	(1,683)	(13,283)
Recoveries		19
Balance at end of period	79,051	119,135
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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Goodwill and Other Acquired Intangible Assets - Schedule of Carrying Amount of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Goodwill And Intangible Assets Disclosure [Abstract]
Beginning Balance	$ 401,872	$ 369,811
Goodwill acquired during the period		32,420
Goodwill adjustment to correct an immaterial error		(359)
Ending Balance	$ 401,872	$ 401,872

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Allowance for Credit Losses and Credit Quality - Effect of Change in Methodology on Company's Unaudited Consolidated Financial Statements (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011
Loan Lease Allowance For Credit Losses Loan Activity And Report By Impairment Methodology [Line Items]
Allowance for loan losses	$ 148,545	$ 201,387	$ 251,603	$ 193,761
(Reversal of) Provision for loan losses	(445)	(15,805)
Provision for unfunded lending commitments	2,131
(Reversal of) Provision for loan losses	$ 0.00
Provision for unfunded lending commitments	$ 0.05
Total provision for credit losses	$ 0.05
Current Methodology [Member]
Loan Lease Allowance For Credit Losses Loan Activity And Report By Impairment Methodology [Line Items]
Allowance for loan losses	64,165
Reserve for unfunded lending commitments	11,959
Allowance for credit losses	76,124
(Reversal of) Provision for loan losses	2,884
Provision for unfunded lending commitments	2,131
Total provision for credit losses	5,015
Previous Methodology [Member]
Loan Lease Allowance For Credit Losses Loan Activity And Report By Impairment Methodology [Line Items]
Allowance for loan losses	73,992
Reserve for unfunded lending commitments
Allowance for credit losses	73,992
(Reversal of) Provision for loan losses	2,883
Provision for unfunded lending commitments
Total provision for credit losses	2,883
Difference of New And Previous Methodology [Member]
Loan Lease Allowance For Credit Losses Loan Activity And Report By Impairment Methodology [Line Items]
Allowance for loan losses	(9,827)
Reserve for unfunded lending commitments	11,959
Allowance for credit losses	2,132
(Reversal of) Provision for loan losses	1
Provision for unfunded lending commitments	2,131
Total provision for credit losses	$ 2,132

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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, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share, Basic And Diluted, By Common Class, Including Two Class Method [Line Items]
Income available to common shareholders	$ 23,192	$ 21,234	$ 39,499	$ 53,187
Distributed earnings to common shareholders - basic	22,771	20,833	38,755	52,178
Distributed and undistributed earnings to common shareholders - diluted	22,767	20,828	38,755	52,180
Weighted average shares outstanding - basic	29,631,799	29,066,000	29,582,081	29,303,849
Weighted average shares outstanding - diluted	29,147,232	28,548,432	29,062,238	28,812,631
Earnings per common share - Basic	$ 0.78	$ 0.73	$ 1.34	$ 1.81
Earnings per common share - diluted	$ 0.78	$ 0.73	$ 1.33	$ 1.81
Unvested Restricted Stock [Member]
Earnings Per Share, Basic And Diluted, By Common Class, Including Two Class Method [Line Items]
Distributed earnings to unvested restricted stock	(421)	(401)	(744)	(1,009)
Undistributed earnings reallocated to unvested restricted stock	$ (4)	$ (5)		$ 2
Earnings per common share - Basic	$ 0.77	$ 0.71	$ 1.33	$ 1.82
Earnings per common share - diluted	$ 0.78	$ 0.72	$ 1.33	$ 1.82

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Loss Sharing Agreements and FDIC Loss Share Receivables - Schedule of FDIC Loss Share Receivable (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
FDIC Loss Share Receivable [Line Items]
Balance		$ 423,069		$ 423,069
Amortization	(22,875)		(33,488)	(68,707)	(89,899)
Impairment		31,813		31,813
Balance	204,885			204,885
FDIC Loss Share Receivable [Member]
FDIC Loss Share Receivable [Line Items]
Balance		423,069		423,069	591,844
Change due to (reversal of) credit loss provision recorded on FDIC covered loans				(58,565)	33,786
Amortization				(68,707)	(89,899)
Submission of reimbursable losses to the FDIC				(44,910)	(97,511)
Impairment				(31,813)
Changes due to a change in cash flow assumptions on OREO and other				(14,189)	(7,053)
Balance	$ 204,885		$ 431,167	$ 204,885	$ 431,167

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Fair Value Measurements - Additional Information (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Fair Value Disclosures [Abstract]
Fair value assets additions to Level 1 purchases	$ 15,220,000
Impaired non-covered loans with an outstanding balance	3,024,000	7,269,000
Reserve in allowance for credit losses	1,092,000	880,000
Asset impairment loss	4,941,000
Book value of company owned branches after impairment loss	$ 0

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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, 2013
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)	$ (1,056)
Change in unrealized gains (losses) relating to assets still held at September 30, 2013
Other Comprehensive 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)
Change in unrealized gains (losses) relating to assets still held at September 30, 2013	$ (25,794)

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Fair Value of Financial Instruments - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]
Short-term borrowings maturity period	90 days

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Basis of Presentation (Policies)

9 Months Ended

Sep. 30, 2013

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, IBERIA Asset Management Inc. (“IAM”), and IBERIA CDE, LLC (“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. IB Aircraft Holdings, LLC owns a fractional share of an aircraft used by management of the Company and its subsidiaries. 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.

Segments

SEGMENTS

All of the Company’s banking operations are considered by management to be aggregated in one reportable operating segment. Because the overall banking operations comprise substantially all of the consolidated operations and none of the Company’s other subsidiaries, either individually or in the aggregate, meet quantitative materiality thresholds, no separate segment disclosures are presented in these consolidated financial statements. The Company has invested in its financial reporting infrastructure to report financial information associated with performance of segments. The Company anticipates reporting this information at the end of 2013.

FDIC Loss Share Receivable

FDIC LOSS SHARE RECEIVABLE

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

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

The Company assesses the indemnification assets for collectability at the acquisition level based on three sources: 1) the FDIC, 2) OREO transactions, and 3) customers. Amounts collectible from the FDIC through loss reimbursements are comprised of losses currently expected within the loss share term. A current period impairment would be recorded to the extent that events or circumstances indicate that losses previously expected to occur within the loss share term are expected to occur subsequent to loss share termination. Amounts collectible through expected gains on the sale of OREO are written-up or impaired each period based on the best available information. Amounts collectible from customers in the form of accretion are deemed collectible to the extent that net acquisition-level yield, which primarily consists of accretion and indemnification asset amortization, are expected to remain positive over the life of the shared loss agreement. Impairment of amounts collectible from customers would be recorded as a current period charge to income, to the extent required to maintain the zero net yield floor.

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

A claim receivable is established within other assets when a loss is incurred and the indemnification asset is reduced when cash is received from the FDIC.

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

As of September 30, 2013, the Company has $108,285,000 of conforming mortgage loans held for sale. Mortgage loans originated and held for sale are carried at the lower of cost or estimated fair value. The Company obtains quotes or bids on these loans directly from purchasing financial institutions. Mortgage loans held for sale that were recorded at estimated fair value are included in Note 16.

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 obtainable market price, if available (Level 1) 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, 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 $1,437,000 and $867,000 in earnings for the three months ended September 30, 2013 and 2012, respectively, and $3,993,000 and $4,900,000 for the nine months ended September 30, 2013 and 2012, respectively.

Derivative financial instruments

The Company may utilize interest rate swap agreements to convert a portion of its variable-rate debt to a fixed rate (cash flow hedge). The Company also enters into commitments to originate loans whereby the interest rate on the prospective loan is determined prior to funding (“rate lock commitments”). 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.

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Consolidated Statements of Shareholders' Equity (Parenthetical) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash dividends declared per share	$ 1.02	$ 1.02
Retained Earnings [Member]
Cash dividends declared per share	$ 1.02	$ 1.02

XML

Basis of Presentation

9 Months Ended

Sep. 30, 2013

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, 2012.

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, IBERIA Asset Management Inc. (“IAM”), and IBERIA CDE, LLC (“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. IB Aircraft Holdings, LLC owns a fractional share of an aircraft used by management of the Company and its subsidiaries. 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.

SEGMENTS

All of the Company’s banking operations are considered by management to be aggregated in one reportable operating segment. Because the overall banking operations comprise substantially all of the consolidated operations and none of the Company’s other subsidiaries, either individually or in the aggregate, meet quantitative materiality thresholds, no separate segment disclosures are presented in these consolidated financial statements. The Company has invested in its financial reporting infrastructure to report financial information associated with performance of segments. The Company anticipates reporting this information at the end of 2013.

FDIC LOSS SHARE RECEIVABLE

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

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

The Company assesses the indemnification assets for collectability at the acquisition level based on three sources: 1) the FDIC, 2) OREO transactions, and 3) customers. Amounts collectible from the FDIC through loss reimbursements are comprised of losses currently expected within the loss share term. A current period impairment would be recorded to the extent that events or circumstances indicate that losses previously expected to occur within the loss share term are expected to occur subsequent to loss share termination. Amounts collectible through expected gains on the sale of OREO are written-up or impaired each period based on the best available information. Amounts collectible from customers in the form of accretion are deemed collectible to the extent that net acquisition-level yield, which primarily consists of accretion and indemnification asset amortization, are expected to remain positive over the life of the shared loss agreement. Impairment of amounts collectible from customers would be recorded as a current period charge to income, to the extent required to maintain the zero net yield floor.

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

A claim receivable is established within other assets when a loss is incurred and the indemnification asset is reduced when cash is received from the FDIC.

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

As of September 30, 2013, the Company has $108,285,000 of conforming mortgage loans held for sale. Mortgage loans originated and held for sale are carried at the lower of cost or estimated fair value. The Company obtains quotes or bids on these loans directly from purchasing financial institutions. Mortgage loans held for sale that were recorded at estimated fair value are included in Note 16.

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 obtainable market price, if available (Level 1) 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, 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 $1,437,000 and $867,000 in earnings for the three months ended September 30, 2013 and 2012, respectively, and $3,993,000 and $4,900,000 for the nine months ended September 30, 2013 and 2012, respectively.

Derivative financial instruments

The Company may utilize interest rate swap agreements to convert a portion of its variable-rate debt to a fixed rate (cash flow hedge). The Company also enters into commitments to originate loans whereby the interest rate on the prospective loan is determined prior to funding (“rate lock commitments”). 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.

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Acquisition and Disposition Activity

9 Months Ended

Sep. 30, 2013

Text Block [Abstract]

Acquisition and Disposition Activity

NOTE 4 –ACQUISITION AND DISPOSITION ACTIVITY

Acquisitions

During the third quarter of 2013, the Company announced the signing of a definitive agreement pursuant to which IBERIABANK will acquire certain assets and assume certain liabilities of the Memphis, Tennessee operations of Trust One Bank, a division of Synovus Bank. The transaction is expected to close in the first quarter of 2014 and is subject to customary closing conditions, including receipt of certain regulatory approvals.

Branch Dispositions

During the fourth quarter of 2012, the Company announced plans to close four branches during 2013 as part of its ongoing business strategy, which includes a periodic review of its branch network to maximize shareholder return. The Company closed these four branches during the first quarter of 2013. During the second quarter of 2013, the Company announced plans to close or consolidate ten additional branches. As part of these branch closures, the Company incurred various disposal costs during the three and nine months ended September 30, 2013, including personnel termination costs, contract termination costs, and fixed asset disposals. The following table shows the costs the Company incurred that are included in its statements of comprehensive income for the periods indicated.

	For the Three Months Ended September 30					For the Nine Months Ended September 30
(Dollars in thousands)	2013			2012		2013		2012
Employee termination	$	(70	)	$	384	$	299	$	384
Accelerated depreciation		352			284		1,033		284
Contract termination		591			—		591		—
Impairment		323			2,743		4,941		2,743
	$	1,196		$	3,411	$	6,864	$	3,411

For the three months ended September 30, 2013, employee termination costs include an adjustment to record the difference between estimated severance costs at the end of the second quarter of 2013 and severance paid to employees during the third quarter of 2013. The difference is a result of a reduction in calculated severance payments due to employee acceptance of other opportunities. The Company estimates future exit costs, which would include additional employee termination costs, fixed asset disposals, and lease termination costs, will not be material.

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Goodwill and Other Acquired Intangible Assets - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Sep. 30, 2013
Goodwill And Intangible Assets Disclosure [Abstract]
Decrease in goodwill	$ 359,000
Impairment of goodwill		9,681,000
Title plant assets	$ 6,722,000	$ 6,722,000

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Recent Accounting Pronouncements

9 Months Ended

Sep. 30, 2013

Accounting Changes And Error Corrections [Abstract]

Recent Accounting Pronouncements

NOTE 2 – RECENT ACCOUNTING PRONOUNCEMENTS

ASU No. 2012-06

For the quarter ended March 31, 2013, the Company adopted the provisions of ASU No. 2012-06, Business Combinations (Topic 805): Subsequent Accounting for an Indemnification Asset Recognized at the Acquisition Date as a Result of a Government-Assisted Acquisition of a Financial Institution, which clarifies the applicable guidance for subsequently measuring an indemnification asset recognized in a government-assisted acquisition of a financial institution that includes a loss-sharing agreement. The ASU addresses the diversity in practice regarding interpretation of the terms “on the same basis” and “contractual limitations” referred to by the applicable accounting guidance. Accounting principles require that an indemnification asset recognized at the acquisition date as a result of a government-assisted acquisition of a financial institution involving an indemnification agreement shall be subsequently measured on the same basis as the indemnified item. The provisions of ASU No. 2012-06 clarify that, upon subsequent remeasurement of an indemnification asset, the effect of the change in expected cash flows of the indemnification agreement shall be amortized. Any amortization of changes in value is limited to the lesser of the contractual term of the indemnification agreement or the remaining life of the indemnified assets. The ASU also clarifies that the pool level is the appropriate unit of account for determining the life of the indemnified loans. The ASU is to be applied prospectively and does not affect the guidance relating to the recognition or initial measurement of an indemnification asset.

Application of the ASU’s provisions on a disaggregated basis had the effect of reducing the remaining period over which the indemnification assets will be amortized. As a result of the shortened amortization period, and based on current cash flow expectations and other assumptions, the Company’s indemnification asset amortization increased amortization expense for the three- and nine-month periods ended September 30, 2013 by $5,496,000 and $15,916,000, respectively, however the change in amortization period did not have a material impact on its financial position and liquidity. Adoption of the ASU also requires the Company to assess the indemnification assets for collectability on a standalone basis. Prior to adoption, the Company assessed collectability of the indemnification asset and the covered loans on a linked basis. The transition in collectability assessment methodology did not have an impact on the Company’s consolidated financial statements for the three months ended September 30, 2013. However, future changes in cash flow expectations and/or other assumptions could result in indemnification asset impairment.

ASU No. 2013-02

In 2013, the Company adopted the provisions of ASU No. 2013-06, Comprehensive Income (Topic 220): Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income, which requires the Company to report the effect of significant reclassifications out of accumulated other comprehensive income on the respective line items in net income on the Company’s consolidated statements of comprehensive income if the amount being reclassified is required under US GAAP to be reclassified in its entirety to net income. The ASU does not change the current requirements for reporting net income or other comprehensive income in the consolidated financial statements of the Company, but does require the Company to provide information about the amounts reclassified out of accumulated other comprehensive income by component.

The adoption of the ASU affects the format and presentation of the Company’s consolidated financial statements and the footnotes to the consolidated financial statements, but does not represent a departure from accounting principles previously applied and thus the adoption did not have an effect on the Company’s operating results, financial position, or liquidity. The information required to be presented or disclosed by this ASU is incorporated in the Company’s statements of comprehensive income and Note 13 in these unaudited consolidated financial statements.

ASU No. 2011-11 and ASU No. 2013-01

In the first quarter of 2013, the Company adopted the provisions of ASU No. 2011-11, Balance Sheet (Topic 210): Disclosures about Offsetting Assets and Liabilities, which requires an entity to disclose gross and net information about certain instruments and transactions eligible for offset in the statement of financial position and instruments and certain transactions subject to an agreement similar to a master netting arrangement. The Company also adopted ASU No. 2013-01, Balance Sheet (Topic 210): Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities, which clarifies the scope of ASU 2011-11. Because the guidance provided by the ASU’s is disclosure related, adoption resulted in additional disclosures incorporated in Note 12 of these unaudited consolidated financial statements.

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Basis of Presentation - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Basis Of Presentation [Line Items]
Company mortgage loans held for sale	$ 108,285,000		$ 108,285,000
Property write-downs	$ 1,437,000	$ 867,000	$ 3,993,000	$ 4,900,000
Commercial [Member]
Basis Of Presentation [Line Items]
Loss sharing indemnification agreements, terms			5 years
Single family residential [Member]
Basis Of Presentation [Line Items]
Loss sharing indemnification agreements, terms			10 years
IBERIABANK Corporation [Member]
Basis Of Presentation [Line Items]
Number of operating states	6		6
IBERIABANK Mortgage Company [Member]
Basis Of Presentation [Line Items]
Number of operating states	12		12

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Investment Securities (Tables)

9 Months Ended

Sep. 30, 2013

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, 2013
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	407,049	$	1,878	$	(7,127	)	$	401,800
Obligations of state and political obligations		109,509		2,967		(235	)		112,241
Mortgage-backed securities		1,449,275		14,928		(15,337	)		1,448,866
Other securities		1,460		22		—			1,482
Total securities available for sale	$	1,967,293	$	19,795	$	(22,699	)	$	1,964,389
Securities held to maturity:
U.S. Government-sponsored enterprise obligations	$	34,471	$	650	$	—		$	35,121
Obligations of state and political obligations		84,471		1,735		(1,425	)		84,781
Mortgage-backed securities		36,736		293		(1,621	)		35,408
Total securities held to maturity	$	155,678	$	2,678	$	(3,046	)	$	155,310

	December 31, 2012
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	281,746	$	4,364	$	(386	)	$	285,724
Obligations of state and political obligations		120,680		6,573		(178	)		127,075
Mortgage-backed securities		1,303,030		29,108		(1,482	)		1,330,656
Other securities		1,460		89		—			1,549
Total securities available for sale	$	1,706,916	$	40,134	$	(2,046	)	$	1,745,004
Securities held to maturity:
U.S. Government-sponsored enterprise obligations	$	69,949	$	1,244	$	—		$	71,193
Obligations of state and political obligations		88,909		4,730		(113	)		93,526
Mortgage-backed securities		46,204		728		(153	)		46,779
Total securities held to maturity	$	205,062	$	6,702	$	(266	)	$	211,498

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, 2013
	Less Than Twelve Months					Over Twelve Months					Total
(Dollars in thousands)	Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	(7,127	)	$	274,195	$	—		$	—	$	(7,127	)	$	274,195
Obligations of state and political obligations		(10	)		326		(225	)		1,047		(235	)		1,373
Mortgage-backed securities		(14,096	)		671,684		(1,241	)		38,600		(15,337	)		710,284
Total securities available for sale	$	(21,233	)	$	946,205	$	(1,466	)	$	39,647	$	(22,699	)	$	985,852
Securities held to maturity:
Obligations of state and political obligations	$	(1,308	)	$	28,433	$	(117	)	$	2,080	$	(1,425	)	$	30,513
Mortgage-backed securities		(850	)		15,490		(771	)		9,805		(1,621	)		25,295
Total securities held to maturity	$	(2,158	)	$	43,923	$	(888	)	$	11,885	$	(3,046	)	$	55,808

	December 31, 2012
	Less Than Twelve Months					Over Twelve Months					Total
(Dollars in thousands)	Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	(386	)	$	59,741	$	—		$	—	$	(386	)	$	59,741
Obligations of state and political obligations		—			—		(178	)		1,094		(178	)		1,094
Mortgage-backed securities		(1,473	)		180,027		(9	)		3,919		(1,482	)		183,946
Total securities available for sale	$	(1,859	)	$	239,768	$	(187	)	$	5,013	$	(2,046	)	$	244,781
Securities held to maturity:
Obligations of state and political obligations	$	(113	)	$	8,242	$	—		$	—	$	(113	)	$	8,242
Mortgage-backed securities		(153	)		16,262		—			—		(153	)		16,262
Total securities held to maturity	$	(266	)	$	24,504	$	—		$	—	$	(266	)	$	24,504

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, 2013 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.

	Securities Available for Sale							Securities Held to Maturity
(Dollars in thousands)	Weighted Average Yield			Amortized Cost		Estimated Fair Value		Weighted Average Yield			Amortized Cost		Estimated Fair Value
Within one year or less		1.99	%	$	16,230	$	16,430		1.85	%	$	24,541	$	24,815
One through five years		1.38			220,047		220,114		3.01			18,071		18,685
After five through ten years		1.98			596,282		597,600		2.60			24,599		25,040
Over ten years		1.92			1,134,734		1,130,245		2.92			88,467		86,770
		1.88	%	$	1,967,293	$	1,964,389		2.71	%	$	155,678	$	155,310

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 September 30					Nine Months Ended September 30
(Dollars in thousands)	2013			2012		2013			2012
Realized gains	$	—		$	41	$	2,369		$	3,758
Realized losses		(3	)		—		(110	)		(15	)
	$	(3	)	$	41	$	2,259		$	3,743

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

The Company included the following securities in “Other assets” on the consolidated balance sheets:

(Dollars in thousands)	September 30 2013		December 31 2012
Federal Home Loan Bank (FHLB) stock	$	12,759	$	16,860
Federal Reserve Bank (FRB) stock		28,098		28,155
Other investments		1,306		1,201
	$	42,163	$	46,216

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

9 Months Ended

Sep. 30, 2013

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)	2013			2012
Balance at beginning of period	$	267,475		$	153,013
Originations		1,712,557			1,749,121
Sales		(1,871,747	)		(1,691,002	)
Balance at end of period	$	108,285		$	211,132

(Dollars in thousands)	2013			2012
Fair value changes of derivatives and mortgage loans held for sale, net	$	(270	)	$	2,954
Gains on sales		51,709			51,828
Servicing and other income, net		402			336
	$	51,841		$	55,118

Schedule of Definite-Lived Intangible Assets

Definite-lived intangible assets had the following carrying values for the periods indicated:

	September 30, 2013							December 31, 2012
(Dollars in thousands)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Core deposit intangibles	$	45,406	$	(29,659	)	$	15,747	$	45,406	$	(26,284	)	$	19,122
Customer relationship intangible asset		1,348		(579	)		769		1,348		(410	)		938
	$	46,754	$	(30,238	)	$	16,516	$	46,754	$	(26,694	)	$	20,060

Mortgage Servicing Rights [Member]

Schedule of Definite-Lived Intangible Assets

Mortgage servicing rights had the following carrying values:

	September 30, 2013							December 31, 2012
(Dollars in thousands)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Mortgage servicing rights	$	1,816	$	(543	)	$	1,273	$	1,234	$	(304	)	$	930

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Transfers and Servicing of Financial Assets (Including Mortgage Banking Activity) - Schedule of Mortgage Servicing Rights at Carrying Values (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 46,754	$ 46,754
Accumulated Amortization	(30,238)	(26,694)
Net Carrying Amount	16,516	20,060
Mortgage Servicing Rights [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	1,816	1,234
Accumulated Amortization	(543)	(304)
Net Carrying Amount	$ 1,273	$ 930

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Share-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2013

Compensation Expense Included in Salaries and Employee Benefits Expense and Related Income Tax Benefits

The following table represents the compensation expense that is included in salaries and employee benefits expense and related income tax benefits in the accompanying consolidated statements of comprehensive income related to stock options.

	For the Three Months Ended September 30				For the Nine Months Ended September 30
(Dollars in thousands, except per share data)	2013		2012		2013		2012
Compensation expense related to stock options	$	526	$	334	$	1,592	$	1,317
Income tax benefit related to stock options		184		117		557		461
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:

	2013			2012
Expected dividends		2.6	%		2.3	%
Expected volatility		34.8	%		33.9	%
Risk-free interest rate		1.7	%		2.9	%
Expected term (in years)		8.6			5.8
Weighted-average grant-date fair value	$	15.37		$	13.58

Activity Related to Stock Options

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

	Number of shares			Weighted Average Exercise Price		Weighted Average Remaining Contract Life
Oustanding options, December 31, 2011		1,097,620		$	50.14
Granted		226,764			51.73
Issued in connection with acquisition		32,863			41.30
Exercised		(46,729	)		29.42
Forfeited or expired		(29,410	)		57.39
Outstanding options, September 30, 2012		1,281,108		$	50.78		4.8	Years
Outstanding exercisable at September 30, 2012		822,410		$	48.94		3.0	Years
Oustanding 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
Outstanding exercisable at September 30, 2013		749,545		$	52.94		3.2	Years

Compensation Expense Included in Salaries and Employee Benefits Expense Related to Restricted Stock Grants

The following table represents the compensation expense that was included in salaries and employee benefits expense in the accompanying consolidated statements of income related to restricted stock grants:

	For the Three Months Ended September 30				For the Nine Months Ended September 30
(Dollars in thousands)	2013		2012		2013		2012
Compensation expense related to restricted stock	$	2,110	$	1,973	$	6,055	$	5,638

Unvested Restricted Stock Award Activity

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

	2013			2012
Balance at beginning of period		538,202			512,112
Granted		166,223			174,393
Forfeited		(27,483	)		(8,736	)
Earned and issued		(136,629	)		(120,644	)
Balance at end of period		540,313			557,125

Schedule of Share and Dividend Equivalent Share Award Activity

The following table represents phantom stock award activity during the periods indicated.

	Number of share equivalents			Dividend equivalents			Total share equivalents			Value of share equivalents (1)
Balance, December 31, 2011		232,921			8,942			241,863		$	11,924,000
Granted		117,506			6,852			124,358			5,696,000
Forfeited share equivalents		(8,052	)		(242	)		(8,294	)		(380,000	)
Vested share equivalents		(16,735	)		(1,144	)		(17,879	)		(894,000	)
Balance, September 30, 2012		325,640			14,408			340,048		$	15,574,000
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

⁽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 $51.91 and $45.80 on September 30, 2013 and 2012, respectively.

Phantom Stock Awards [Member]

Compensation Expense Included in Salaries and Employee Benefits 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 period and the current market price of the Company’s stock.

	For the Three Months Ended September 30				For the Nine Months Ended September 30
(Dollars in thousands)	2013		2012		2013		2012
Compensation expense related to phantom stock	$	792	$	245	$	2,602	$	1,426

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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, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Mortgage Loan Activity [Line Items]
Balance at beginning of period			$ 267,475
Originations			1,712,557
Sales			(1,923,455)
Balance at end of period	108,285		108,285
Gains on sales			51,709
Total mortgage income	15,202	23,215	51,841	55,118
Mortgage Loans Held for Sale [Member]
Mortgage Loan Activity [Line Items]
Balance at beginning of period			267,475	153,013
Originations			1,712,557	1,749,121
Sales			(1,871,747)	(1,691,002)
Balance at end of period	108,285	211,132	108,285	211,132
Mortgage Income [Member]
Mortgage Loan Activity [Line Items]
Fair value changes of derivatives and mortgage loans held for sale, net			(270)	2,954
Gains on sales			51,709	51,828
Servicing and other income, net			402	336
Total mortgage income			$ 51,841	$ 55,118

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Fair Value Measurements - Financial Assets and Liabilities Measured at Fair Value on Nonrecurring Basis (Detail) (Fair Value, Measurements, Nonrecurring [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Fair Value Measurements [Line Items]
Loans, Assets	$ 1,932	$ 6,388
Mortgage loans held for sale, Assets	3,213	32,753
OREO, Assets	20,427	20,427
Total, Assets	25,572	59,568
Level 1 [Member]
Fair Value Measurements [Line Items]
Loans, Assets
Mortgage loans held for sale, Assets
OREO, Assets
Total, Assets
Level 2 [Member]
Fair Value Measurements [Line Items]
Loans, Assets	1,932	6,388
Mortgage loans held for sale, Assets	3,213	32,753
OREO, Assets	20,427	20,427
Total, Assets	25,572	59,568
Level 3 [Member]
Fair Value Measurements [Line Items]
Loans, Assets
Mortgage loans held for sale, Assets
OREO, Assets
Total, Assets

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Loans Receivable - Additional Information (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Loans Receivable [Line Items]
Deferred loan origination fees	$ 16,445,000		$ 14,040,000
Deferred loan expenses	7,154,000		5,270,000
Deposit liabilities reclassified as loans receivable	2,319,000		3,231,000
Loans with carrying value pledged to secure public deposits and other borrowings	2,200,000,000		1,500,000,000
Non-covered troubled debt restructurings modified during the current period	11,210,000	4,391,000
Troubled Debt Restructurings [Member]
Loans Receivable [Line Items]
Total TDRs	$ 19,941,000	$ 21,840,000

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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, 2013	Dec. 31, 2012
Schedule of Securities Available-for-sale And Held To Maturity [Line Items]
Securities available for sale, Less Than Twelve Months, Gross Unrealized Losses	$ (21,233)	$ (1,859)
Securities available for sale, Less Than Twelve Months, Fair Value	946,205	239,768
Securities available for sale, Over Twelve Months, Gross Unrealized Losses	(1,466)	(187)
Securities available for sale, Over Twelve Months, Fair Value	39,647	5,013
Securities available for sale, Gross Unrealized Losses, Total	(22,699)	(2,046)
Securities available for sale, Fair Value, Total	985,852	244,781
Securities held to maturity, Less Than Twelve Months, Gross Unrealized Losses	(2,158)	(266)
Securities held to maturity, Less Than Twelve Months, Fair Value	43,923	24,504
Securities held to maturity, Over Twelve Months, Gross Unrealized Losses	(888)
Securities held to maturity, Over Twelve Months, Fair Value	11,885
Securities held to maturity, Gross Unrealized Losses, Total	(3,046)	(266)
Securities held to maturity, Fair Value, Total	55,808	24,504
U.S. Government-Sponsored Enterprise Obligations [Member]
Schedule of Securities Available-for-sale And Held To Maturity [Line Items]
Securities available for sale, Less Than Twelve Months, Gross Unrealized Losses	(7,127)	(386)
Securities available for sale, Less Than Twelve Months, Fair Value	274,195	59,741
Securities available for sale, Over Twelve Months, Gross Unrealized Losses
Securities available for sale, Over Twelve Months, Fair Value
Securities available for sale, Gross Unrealized Losses, Total	(7,127)	(386)
Securities available for sale, Fair Value, Total	274,195	59,741
Obligations of State and Political Obligations [Member]
Schedule of Securities Available-for-sale And Held To Maturity [Line Items]
Securities available for sale, Less Than Twelve Months, Gross Unrealized Losses	(10)
Securities available for sale, Less Than Twelve Months, Fair Value	326
Securities available for sale, Over Twelve Months, Gross Unrealized Losses	(225)	(178)
Securities available for sale, Over Twelve Months, Fair Value	1,047	1,094
Securities available for sale, Gross Unrealized Losses, Total	(235)	(178)
Securities available for sale, Fair Value, Total	1,373	1,094
Securities held to maturity, Less Than Twelve Months, Gross Unrealized Losses	(1,308)	(113)
Securities held to maturity, Less Than Twelve Months, Fair Value	28,433	8,242
Securities held to maturity, Over Twelve Months, Gross Unrealized Losses	(117)
Securities held to maturity, Over Twelve Months, Fair Value	2,080
Securities held to maturity, Gross Unrealized Losses, Total	(1,425)	(113)
Securities held to maturity, Fair Value, Total	30,513	8,242
Mortgage-Backed Securities [Member]
Schedule of Securities Available-for-sale And Held To Maturity [Line Items]
Securities available for sale, Less Than Twelve Months, Gross Unrealized Losses	(14,096)	(1,473)
Securities available for sale, Less Than Twelve Months, Fair Value	671,684	180,027
Securities available for sale, Over Twelve Months, Gross Unrealized Losses	(1,241)	(9)
Securities available for sale, Over Twelve Months, Fair Value	38,600	3,919
Securities available for sale, Gross Unrealized Losses, Total	(15,337)	(1,482)
Securities available for sale, Fair Value, Total	710,284	183,946
Securities held to maturity, Less Than Twelve Months, Gross Unrealized Losses	(850)	(153)
Securities held to maturity, Less Than Twelve Months, Fair Value	15,490	16,262
Securities held to maturity, Over Twelve Months, Gross Unrealized Losses	(771)
Securities held to maturity, Over Twelve Months, Fair Value	9,805
Securities held to maturity, Gross Unrealized Losses, Total	(1,621)	(153)
Securities held to maturity, Fair Value, Total	$ 25,295	$ 16,262

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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, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Distributed earnings	$ 9,926	$ 9,826	$ 29,736	$ 29,695
Undistributed earnings to common shareholders	12,845	11,007	9,019	22,483
Total earnings to common shareholders	22,771	20,833	38,755	52,178
Distributed earnings	$ 0.34	$ 0.34	$ 1.03	$ 1.03
Undistributed earnings per common share	$ 0.44	$ 0.39	$ 0.31	$ 0.78
Total earnings per common share - basic	$ 0.78	$ 0.73	$ 1.34	$ 1.81
Unvested Restricted Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Distributed earnings	183	189	571	574
Undistributed earnings to common shareholders	238	212	173	435
Total earnings allocated to unvested restricted stock	$ 421	$ 401	$ 744	$ 1,009
Distributed earnings	$ 0.34	$ 0.34	$ 1.02	$ 1.04
Undistributed earnings per common share	$ 0.43	$ 0.37	$ 0.31	$ 0.78
Total earnings per common share - basic	$ 0.77	$ 0.71	$ 1.33	$ 1.82

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Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]
Securities held to maturity, fair values	$ 155,310	$ 211,498
Common stock, par value	$ 1	$ 1
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	31,917,385	31,917,385
Treasury stock, shares	2,182,926	2,427,640

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Allowance for Credit Losses and Credit Quality

9 Months Ended

Sep. 30, 2013

Receivables [Abstract]

Allowance for Credit Losses and Credit Quality

NOTE 7 – ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY

Change in Methodology

During the nine-month period ended September 30, 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 Office of the Comptroller of Currency’s (“OCC”) 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 credit losses, and to enhance the previous methodology around loss migration.

As part of the modification, the Company’s calculation of its allowance for credit losses incorporates a new loss migration model designed by the Company to improve its estimates of credit losses by:

• Providing a greater degree of segmentation of the Company’s non-covered, non-acquired loan portfolio within its existing homogeneous pools with distinct risk characteristics;

• Improving the application of the Company’s specific historical loss rates to effectively generate estimated incurred loss rates for these various pools of the loan portfolio; and

• Facilitating future loan portfolio stress testing.

The following changes were made from the Company’s previous methodology utilized through the three months ended March 31, 2013:

• Segregation of the RULC noted above;

• Creation of a transition matrix-based model that calculates current incurred loss estimates derived from Company-specific history of risk rating changes and net charge-offs across multiple loan pools in its portfolio; and

• Elimination of the use of published available expected default frequencies (“EDFs”) adjusted for the Company’s experience in estimating losses in the Company’s commercial real estate and business loan portfolios.

The following table presents the effect of the change in methodology on the Company’s unaudited consolidated financial statements as of September 30, 2013.

(Dollars in thousands)	Current Methodology		Previous Methodolgy		Difference			Per Share Difference
Selected Data
Allowance for loan losses	$	64,165	$	73,992	$	(9,827	)
Reserve for unfunded lending commitments		11,959		—		11,959
Allowance for credit losses	$	76,124	$	73,992	$	2,132
(Reversal of)Provision for loan losses	$	2,884	$	2,883	$	1		$	(0.00	)
Provision for unfunded lending commitments		2,131		—		2,131			0.05
Total provision for credit losses	$	5,015	$	2,883	$	2,132		$	0.05

Allowance for Credit Losses Activity

A summary of changes in the allowance for credit losses for the covered loan and non-covered loan portfolios is as follows:

	September 30, 2013
	Non-covered loans
(Dollars in thousands)	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 benefit 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
Decrease in FDIC loss share receivable		—			—			(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 at 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

	September 30, 2012
	Non-covered loans
	Excluding Acquired Loans			Acquired Loans			Covered Loans			Total
Allowance for loan losses
Balance at beginning of period	$	74,861		$	—		$	118,900		$	193,761
(Reversal of) Provision for loan losses before benefit attributable to FDIC loss share agreements		6,518			5,805			37,268			49,591
Adjustment attributable to FDIC loss share arrangements		—			—			(33,786	)		(33,786	)
Net (reversal of) provision for loan losses		6,518			5,805			3,482			15,805
Increase in FDIC loss share receivable		—			—			33,786			33,786
Transfer of balance to OREO		—			(408	)		(23,769	)		(24,177	)
Loans charged-off		(6,818	)		(179	)		(13,283	)		(20,280	)
Recoveries		2,455			18			19			2,492
Balance at end of period	$	77,016		$	5,236		$	119,135		$	201,387

A summary of changes in the allowance for credit losses for non-covered loans, by loan portfolio type, is as follows:

	September 30, 2013
(Dollars in thousands)	Commercial real estate			Commercial business			Mortgage			Consumer			Unallocated		Total
Allowance for loan 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

	September 30, 2012
(Dollars in thousands)	Commercial real estate			Commercial business			Mortgage			Consumer			Unallocated		Total
Allowance for credit losses
Balance at beginning of period	$	35,604		$	25,705		$	897		$	12,655		$	—	$	74,861
(Reversal of) Provision for loan losses		4,199			3,851			1,344			2,929			—		12,323
Transfer of balance to OREO		(62	)		—			(337	)		(9	)		—		(408	)
Loans charged off		(1,195	)		(769	)		(759	)		(4,274	)		—		(6,997	)
Recoveries		790			80			30			1,573			—		2,473
Balance at end of period	$	39,336		$	28,867		$	1,175		$	12,874		$	—	$	82,252
Allowance on loans individually evaluated for impairment	$	1,173		$	162		$	163		$	43		$	—	$	1,541
Allowance on loans collectively evaluated for impairment		38,163			28,705			1,012			12,831			—		80,711
Loans, net of unearned income:
Balance at end of period	$	2,879,836		$	2,357,303		$	266,069		$	1,587,488		$	—	$	7,090,696
Balance at end of period individually evaluated for impairment		26,353			1,888			1,703			318			—		30,262
Balance at end of period collectively evaluated for impairment		2,853,483			2,355,415			264,366			1,587,170			—		7,060,434
Balance at end of period acquired with deteriorated credit quality		60,360			3,675			430			5,334			—		69,799

A summary of changes in the allowance for credit losses for covered loans, by loan portfolio type, is as follows:

	September 30, 2013
(Dollars in thousands)	Commercial real estate			Commercial business			Mortgage			Consumer			Unallocated		Total
Allowance for loan 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

	September 30, 2012
(Dollars in thousands)	Commercial real estate			Commercial business			Mortgage			Consumer			Unallocated		Total
Allowance for credit losses
Balance at beginning of period	$	69,175		$	9,788		$	21,184		$	18,753		$	—	$	118,900
(Reversal of) Provision for loan losses		3,550			922			(1,387	)		397			—		3,482
(Decrease) Increase in FDIC loss share receivable		24,229			2,398			4,277			2,882			—		33,786
Transfer of balance to OREO		(9,876	)		(2,475	)		(10,593	)		(825	)		—		(23,769	)
Loans charged off		(13,143	)		—			(131	)		(9	)		—		(13,283	)
Recoveries		16			—			—			3			—		19
Balance at end of period	$	73,951		$	10,633		$	13,350		$	21,201		$	—	$	119,135
Allowance on loans individually evaluated for impairment	$	—		$	—		$	—		$	—		$	—	$	—
Allowance on loans collectively evaluated for impairment		73,951			10,633			13,350			21,201			—		119,135
Loans, net of unearned income:
Balance at end of period	$	670,001		$	91,822		$	197,333		$	180,094		$	—	$	1,139,250
Balance at end of period individually evaluated for impairment		—			—			—			—			—		—
Balance at end of period collectively evaluated for impairment		670,001			91,822			197,333			180,094			—		1,139,250
Balance at end of period acquired with deteriorated credit quality		171,965			3,522			22,085			24,388			—		221,960

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 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, 2013 and December 31, 2012.

	Non-covered loans excluding acquired loans
	September 30, 2013										December 31, 2012
(Dollars in thousands)	Pass		Special Mention		Substandard		Doubtful		Total		Pass		Special Mention		Substandard		Doubtful		Total
Commercial real estate construction	$	374,458	$	4,800	$	3,837	$	—	$	383,095	$	269,842	$	16,767	$	7,067	$	—	$	293,676
Commercial real estate - other		2,503,820		37,537		26,896		117		2,568,370		2,162,989		40,547		47,710		398		2,251,644
Commercial business		2,546,614		9,013		32,825		953		2,589,405		2,295,788		21,640		49,958		48		2,367,434
Total	$	5,424,892	$	51,350	$	63,558	$	1,070		5,540,870	$	4,728,619	$	78,954	$	104,735	$	446	$	4,912,754

	Non-covered loans excluding acquired loans
	September 30, 2013						December 31, 2012
(Dollars in thousands)	Current		30+ Days Past Due		Total		Current		30+ Days Past Due		Total
Residential prime	$	261,615	$	12,140	$	273,755	$	185,843	$	10,986	$	196,829
Residential subprime		115,715		442		116,157		60,454		—		60,454
Home equity		1,063,257		9,414		1,072,671		991,766		8,872		1,000,638
Indirect automobile		364,094		3,214		367,308		320,148		2,818		322,966
Credit card		59,225		711		59,936		51,117		605		51,722
Consumer - other		287,477		1,399		288,876		201,161		981		202,142
	$	2,151,383	$	27,320	$	2,178,703	$	1,810,489	$	24,262	$	1,834,751

	Non-covered acquired loans
	September 30, 2013													December 31, 2012
(Dollars in thousands)	Pass		Special Mention		Substandard		Doubtful		Discount			Total		Pass		Special Mention		Substandard		Doubtful		Discount			Total
Commercial real estate construction	$	12,900	$	1,321	$	4,353	$	—	$	(1,928	)	$	16,646	$	25,896	$	2,410	$	5,228	$	—	$	(3,968	)	$	29,566
Commercial real estate - other		320,781		18,438		63,816		212		(51,025	)		352,222		359,046		28,185		85,420		218		(57,055	)		415,814
Commercial business		56,465		2,241		3,725		88		(8,102	)		54,417		86,201		2,159		4,808		2,209		(12,144	)		83,233
Total	$	390,146	$	22,000	$	71,894	$	300	$	(61,055	)	$	423,285	$	471,143	$	32,754	$	95,456	$	2,427	$	(73,167	)	$	528,613

	Non-covered acquired loans
	September 30, 2013									December 31, 2012
(Dollars in thousands)	Current		30+ Days Past Due		Premium (discount)			Total		Current		30+ Days Past Due		Premium (discount)			Total
Residential prime	$	20,388	$	226	$	(586	)	$	20,028	$	30,663	$	779	$	1,315		$	32,757
Home equity		56,842		6,550		(4,193	)		59,199		73,658		7,115		(4,498	)		76,275
Indirect automobile		2,258		189		—			2,447		4,698		321		—			5,019
Consumer - other		13,859		1,295		(3,651	)		11,503		21,746		714		(6,805	)		15,655
	$	93,347	$	8,260	$	(8,430	)	$	93,177	$	130,765	$	8,929	$	(9,988	)	$	129,706

Credit quality information in the table above includes loans acquired at the gross loan balance, prior to the application of discounts, at September 30, 2013 and December 31, 2012.

The Company’s investment in covered loans by credit quality indicator is presented in the following table. Loan discounts in the tables below represent the adjustment of covered loans to fair value at the date, as adjusted for income accretion and changes in cash flow estimates in subsequent periods.

	Covered loans
	September 30, 2013											December 31, 2012
(Dollars in thousands)	Pass		Special Mention		Substandard		Doubtful		Total			Pass		Special Mention		Substandard		Doubtful		Total
Commercial real estate construction	$	44,312	$	8,093	$	42,849	$	497	$	95,751		$	46,201	$	9,888	$	97,315	$	607	$	154,011
Commercial real estate - other		146,103		56,182		194,785		7,496		404,566			201,261		65,498		279,171		8,530		554,460
Commercial business		33,112		958		17,201		1,277		52,548			38,552		8,600		50,018		451		97,621
Total	$	223,527	$	65,233	$	254,835	$	9,270	$	552,865		$	286,014	$	83,986	$	426,504	$	9,588	$	806,092
Discount										(52,937	)										(78,198	)
									$	499,928										$	727,894

	Covered loans
	September 30, 2013									December 31, 2012
(Dollars in thousands)	Current		30+ Days Past Due		Premium (discount)			Total		Current		30+ Days Past Due		Premium (discount)			Total
Residential prime	$	164,214	$	33,114	$	(43,813	)	$	153,515	$	183,795	$	52,379	$	(49,010	)	$	187,164
Home equity		150,302		41,683		(42,841	)		149,144		168,729		65,997		(60,514	)		174,212
Credit card		665		36		—			701		841		65		—			906
Consumer - other		643		204		2,867			3,714		1,154		1,523		(97	)		2,580
	$	315,824	$	75,037	$	(83,787	)	$	307,074	$	354,519	$	119,964	$	(109,621	)	$	364,862

Impaired Loans

Information on the Company’s investment in impaired loans is presented in the following tables as of and for the periods indicated.

	September 30, 2013							December 31, 2012
(Dollars in thousands)	Recorded Investment		Unpaid Principal Balance		Related Allowance			Recorded Investment		Unpaid Principal Balance		Related Allowance
With no related allowance recorded:
Commercial real estate	$	9,392	$	9,392	$	—		$	26,151	$	26,151	$	—
Commercial business		13,068		13,068		—			1,824		1,824		—
Home equity		263		263		—			—		—		—
With an allowance recorded:
Commercial real estate		2,913		2,937		(24	)		3,464		3,663		(199	)
Commercial business		2,569		2,579		(10	)		1,334		1,810		(476	)
Residential prime		9,575		9,908		(333	)		9,861		10,070		(209	)
Home equity		6,784		6,829		(45	)		5,860		5,951		(91	)
Indirect automobile		1,050		1,056		(6	)		865		868		(3	)
Credit card		417		425		(8	)		413		424		(11	)
Other		252		255		(3	)		307		310		(3	)
	$	46,283	$	46,712	$	(429	)	$	50,079	$	51,071	$	(992	)
Total commercial loans		27,942		27,976		(34	)		32,773		33,448		(675	)
Total mortgage loans		9,575		9,908		(333	)		9,861		10,070		(209	)
Total consumer loans		8,766		8,828		(62	)		7,445		7,553		(108	)

	For the Three Months Ended September 30								For the Nine Months Ended September 30
	2013				2012				2013				2012
(Dollars in thousands)	Average Recorded Investment		Interest Income Recognized (1)		Average Recorded Investment		Interest Income Recognized (1)		Average Recorded Investment		Interest Income Recognized (1)		Average Recorded Investment		Interest Income Recognized (1)
With no related allowance recorded:
Commercial real estate	$	10,703	$	6	$	27,547	$	15	$	12,787	$	22	$	29,872	$	651
Commercial business		13,218		17		2,451		—		8,608		59		3,387		71
Home Equity		265		—		225		—		287		—		227		—
With an allowance recorded:
Commercial real estate		4,346		—		2,731		8		6,092		5		2,866		22
Commercial business		2,739		—		209		1		2,746		3		215		1
Residential prime		9,650		—		9,248		—		9,380		7		7,439		148
Home equity		7,244		—		6,184		—		7,458		14		6,502		110
Indirect automobile		1,349		—		1,135		—		1,610		22		1,345		20
Credit card		424		—		387		—		426		—		354		—
Other		372		—		585		—		446		4		675		6
	$	50,310	$	23	$	50,702	$	24	$	49,840	$	136	$	52,882	$	1,029
Total commercial loans		31,006		23		32,938		24		30,233		89		36,340		745
Total mortgage loans		9,650		—		9,248		—		9,380		7		7,439		148
Total consumer loans		9,654		—		8,516		—		10,227		40		9,103		136

(1) Interest income recognized on impaired loans represents income recognized before loans were placed on nonaccrual status.

As of September 30, 2013 and December 31, 2012, the Company was not committed to lend additional funds to any customer whose loan was classified as impaired or as a troubled debt restructuring.

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Consolidated Statements of Shareholders' Equity (USD $) In Thousands, except Share data	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]
Beginning balance at Dec. 31, 2011	$ 1,482,661	$ 31,163	$ 1,135,880	$ 375,184	$ 24,457	$ (84,023)
Beginning balance, shares at Dec. 31, 2011		31,163,070				1,789,165
Net income	53,187			53,187
Other comprehensive income (loss)	2,474				2,474
Cash dividends declared, $1.02 per share	(30,080)			(30,080)
Reissuance of treasury stock under incentive plan, net of shares surrendered in payment, including tax benefit	836		17			819
Reissuance of treasury stock under incentive plan, shares						(181,836)
Common stock issued for acquisitions	39,203	754	38,449
Common stock issued for acquisitions, shares		754,334
Common stock issued for recognition and retention plan			(7,776)			7,776
Share-based compensation cost	7,306		7,306
Treasury stock acquired at cost	(40,433)					(40,433)
Treasury stock acquired at cost, Shares						853,308
Ending balance at Sep. 30, 2012	1,515,154	31,917	1,173,876	398,291	26,931	(115,861)
Ending balance, shares at Sep. 30, 2012		31,917,404				2,460,637
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 plan, net of shares surrendered in payment, including tax benefit	4,003		(966)			4,969
Reissuance of treasury stock under incentive plan, shares						(244,714)
Common stock issued for recognition and retention plan			(8,016)			8,016
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

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Loans Receivable - Schedule of Carrying Amount of Acquired Covered Loans (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Loans Receivable [Line Items]
Acquired Impaired Loans	$ 78,484	$ 213,645
Acquired Performing Loans	728,518	879,111
Total Covered Loans	807,002	1,092,756
Commercial Loans [Member]
Loans Receivable [Line Items]
Acquired Impaired Loans	23,751	170,499
Acquired Performing Loans	476,177	557,395
Total Covered Loans	499,928	727,894
Residential Mortgage Loans [Member]
Loans Receivable [Line Items]
Acquired Impaired Loans	28,333	20,232
Acquired Performing Loans	125,182	166,932
Total Covered Loans	153,515	187,164
Consumer and Other Loans [Member]
Loans Receivable [Line Items]
Acquired Impaired Loans	26,400	22,914
Acquired Performing Loans	127,159	154,784
Total Covered Loans	153,559	177,698
Real Estate [Member] | Commercial Loans [Member]
Loans Receivable [Line Items]
Acquired Impaired Loans	23,751	167,742
Acquired Performing Loans	435,755	473,101
Total Covered Loans	459,506	640,843
Business [Member] | Commercial Loans [Member]
Loans Receivable [Line Items]
Acquired Impaired Loans		2,757
Acquired Performing Loans	40,422	84,294
Total Covered Loans	40,422	87,051
Residential 1-4 Family [Member] | Residential Mortgage Loans [Member]
Loans Receivable [Line Items]
Acquired Impaired Loans	28,333	20,232
Acquired Performing Loans	125,182	166,932
Total Covered Loans	153,515	187,164
Home Equity [Member] | Consumer and Other Loans [Member]
Loans Receivable [Line Items]
Acquired Impaired Loans	25,195	22,094
Acquired Performing Loans	123,949	152,118
Total Covered Loans	149,144	174,212
Consumer - Other [Member] | Consumer and Other Loans [Member]
Loans Receivable [Line Items]
Acquired Impaired Loans	1,205	820
Acquired Performing Loans	3,210	2,666
Total Covered Loans	$ 4,415	$ 3,486

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Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Assets
Cash and due from banks	$ 260,742	$ 248,214
Interest-bearing deposits in banks	292,706	722,763
Total cash and cash equivalents	553,448	970,977
Securities available for sale, at fair value	1,964,389	1,745,004
Securities held to maturity, fair values of $155,310 and $211,498, respectively	155,678	205,062
Mortgage loans held for sale	108,285	267,475
Loans covered by loss share agreements	807,002	1,092,756
Non-covered loans, net of unearned income	8,236,035	7,405,824
Total loans, net of unearned income	9,043,037	8,498,580
Allowance for credit losses	(148,545)	(251,603)
Loans, net	8,894,492	8,246,977
FDIC loss share receivables	204,885	423,069
Premises and equipment, net	289,157	303,523
Goodwill	401,872	401,872
Other assets	572,871	565,719
Total Assets	13,145,077	13,129,678
Liabilities
Noninterest-bearing	2,529,296	1,967,662
Interest-bearing	8,421,468	8,780,615
Total deposits	10,950,764	10,748,277
Short-term borrowings	258,850	303,045
Long-term debt	281,101	423,377
Other liabilities	129,094	125,111
Total Liabilities	11,619,809	11,599,810
Shareholders' Equity
Common stock, $1 par value - 50,000,000 shares authorized; 31,917,385 shares issued	31,917	31,917
Additional paid-in capital	1,175,197	1,176,180
Retained earnings	420,664	411,472
Accumulated other comprehensive income (loss)	(1,317)	24,477
Treasury stock at cost - 2,182,926 and 2,427,640 shares, respectively	(101,193)	(114,178)
Total Shareholders' Equity	1,525,268	1,529,868
Total Liabilities and Shareholders' Equity	$ 13,145,077	$ 13,129,678

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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, 2013	Dec. 31, 2012
Investments Debt And Equity Securities [Abstract]
Securities Available for Sale, Weighted Average Yield, Within one year or less	1.99%
Securities Available for Sale, Weighted Average Yield, One through five years	1.38%
Securities Available for Sale, Weighted Average Yield, After five through ten years	1.98%
Securities Available for Sale, Weighted Average Yield, Over ten years	1.92%
Securities Available for Sale, Weighted Average Yield, Totals	1.88%
Securities Available for Sale, Amortized Cost, Within one year or less	$ 16,230
Securities Available for Sale, Amortized Cost, One through five years	220,047
Securities Available for Sale, Amortized Cost, After five through ten years	596,282
Securities Available for Sale, Amortized Cost, Over ten years	1,134,734
Securities Available for Sale, Amortized Cost, Totals	1,967,293
Securities Available for Sale, Fair Value, Within one year or less	16,430
Securities Available for Sale, Fair Value, One through five years	220,114
Securities Available for Sale, Fair Value, After five through ten years	597,600
Securities Available for Sale, Fair Value, Over ten years	1,130,245
Securities Available for Sale, Fair Value, Totals	1,964,389
Securities Held to Maturity, Weighted Average Yield, Within one year or less	1.85%
Securities Held to Maturity, Weighted Average Yield, One through five years	3.01%
Securities Held to Maturity, Weighted Average Yield, After five through ten years	2.60%
Securities Held to Maturity, Weighted Average Yield, Over ten years	2.92%
Securities Held to Maturity, Weighted Average Yield, Totals	2.71%
Securities Held to Maturity, Amortized Cost, Within one year or less	24,541
Securities Held to Maturity, Amortized Cost, One through five years	18,071
Securities Held to Maturity, Amortized Cost, After five through ten years	24,599
Securities Held to Maturity, Amortized Cost, Over ten years	88,467
Securities Held to Maturity, Amortized Cost, Totals	155,678	205,062
Securities Held to Maturity, Fair Value, Within one year or less	24,815
Securities Held to Maturity, Fair Value, One through five years	18,685
Securities Held to Maturity, Fair Value, After five through ten years	25,040
Securities Held to Maturity, Fair Value, Over ten years	86,770
Securities Held to Maturity, Fair Value, Totals	$ 155,310	$ 211,498

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Derivative Instruments and Other Hedging Activities - Schedule of Derivative Instruments on Consolidated Financial Statements (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Derivative Instruments And Hedging Activities [Line Items]
Amount of Gain (Loss) Recognized in OCI, net of taxes (Effective Portion)		$ (2,358)		$ (2,358)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)		(408)	(392)	(1,195)
Amount of Gain (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)
Amount of Gain (Loss) Recognized in Income on Derivatives			209
Not Designated as Hedging Instruments [Member]
Derivative Instruments And Hedging Activities [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	(2,545)	1,738	(381)	3,834
Not Designated as Hedging Instruments [Member] | Forward Sale Contracts [Member]
Derivative Instruments And Hedging Activities [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	3,290	(1,887)	897	(1,887)
Not Designated as Hedging Instruments [Member] | Written and Purchased Options [Member]
Derivative Instruments And Hedging Activities [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	(7,896)	3,378	(3,820)	5,094
Interest Rate Contracts [Member] | Not Designated as Hedging Instruments [Member] | Other Income (Expense) [Member]
Derivative Instruments And Hedging Activities [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	2,061	247	2,542	627
Interest Rate Contracts [Member] | Cash Flow Hedging [Member]
Derivative Instruments And Hedging Activities [Line Items]
Amount of Gain (Loss) Recognized in OCI, net of taxes (Effective Portion)		(2,358)		(2,358)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)		(408)	(392)	(1,195)
Amount of Gain (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)

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Other Real Estate Owned - Schedule of Other Real Estate Owned Segregated into Non-Covered and Covered Properties (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Real Estate Properties [Line Items]
Real estate owned acquired by foreclosure	$ 116,877	$ 110,864
Real estate acquired for development or resale	10,518	9,199
Other foreclosed property	1,592	1,473
Total other real estate owned and foreclosed property	128,987	121,536
Non-covered Properties [Member]
Real Estate Properties [Line Items]
Real estate owned acquired by foreclosure	31,261	35,080
Real estate acquired for development or resale	10,518	9,199
Other foreclosed property	109	14
Total other real estate owned and foreclosed property	41,888	44,293
Covered Properties [Member]
Real Estate Properties [Line Items]
Real estate owned acquired by foreclosure	85,616	75,784
Other foreclosed property	1,483	1,459
Total other real estate owned and foreclosed property	$ 87,099	$ 77,243

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Loans Receivable (Tables)

9 Months Ended

Sep. 30, 2013

Schedule of Non-Covered Loans Outstanding

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

	September 30, 2013
(Dollars in thousands)	Non-covered loans		Covered loans		Total
Commercial loans:
Real estate	$	3,320,333	$	459,506	$	3,779,839
Business		2,643,822		40,422		2,684,244
		5,964,155		499,928		6,464,083
Residential mortgage loans:
Residential 1-4 family		402,354		153,515		555,869
Construction / Owner Occupied		7,586		—		7,586
		409,940		153,515		563,455
Consumer and other loans:
Home equity		1,131,870		149,144		1,281,014
Indirect automobile		369,755		—		369,755
Other		360,315		4,415		364,730
		1,861,940		153,559		2,015,499
	$	8,236,035	$	807,002	$	9,043,037

	December 31, 2012
(Dollars in thousands)	Non-covered loans		Covered loans		Total
Commercial loans:
Real estate	$	2,990,700	$	640,843	$	3,631,543
Business		2,450,667		87,051		2,537,718
		5,441,367		727,894		6,169,261
Residential mortgage loans:
Residential 1-4 family		284,019		187,164		471,183
Construction / Owner Occupied		6,021		—		6,021
		290,040		187,164		477,204
Consumer and other loans:
Home equity		1,076,913		174,212		1,251,125
Indirect automobile		327,985		—		327,985
Other		269,519		3,486		273,005
		1,674,417		177,698		1,852,115
	$	7,405,824	$	1,092,756	$	8,498,580

Schedule of Non-Covered Loans on Nonaccrual Status

The following table provides the recorded investment of non-covered loans on nonaccrual status at September 30, 2013 and December 31, 2012. Nonaccrual loans in the table exclude acquired loans.

(Dollars in thousands)	September 30, 2013		December 31, 2012
Commercial real estate construction	$	2,430	$	5,479
Commercial real estate - other		9,488		23,475
Commercial business		14,591		3,358
Residential prime		8,501		8,367
Home equity		7,092		5,635
Indirect automobile		1,056		868
Credit card		425		424
Other		255		310
	$	43,838	$	47,916

Schedule of Carrying Amount of Acquired Covered Loans

The carrying amount of the acquired covered loans at September 30, 2013 and December 31, 2012 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, 2013
(Dollars in thousands)	Acquired Impaired Loans		Acquired Performing Loans		Total Covered Loans
Commercial loans:
Real estate	$	23,751	$	435,755	$	459,506
Business		—		40,422		40,422
		23,751		476,177		499,928
Residential mortgage loans:
Residential 1-4 family		28,333		125,182		153,515
Construction / Owner Occupied		—		—		—
		28,333		125,182		153,515
Consumer and other loans:
Home equity		25,195		123,949		149,144
Indirect automobile		—		—		—
Other		1,205		3,210		4,415
		26,400		127,159		153,559
	$	78,484	$	728,518	$	807,002

	December 31, 2012
(Dollars in thousands)	Acquired Impaired Loans		Acquired Performing Loans		Total Covered Loans
Commercial loans:
Real estate	$	167,742	$	473,101	$	640,843
Business		2,757		84,294		87,051
		170,499		557,395		727,894
Residential mortgage loans:
Residential 1-4 family		20,232		166,932		187,164
Construction / Owner Occupied		—		—		—
		20,232		166,932		187,164
Consumer and other loans:
Home equity		22,094		152,118		174,212
Indirect automobile		—		—		—
Other		820		2,666		3,486
		22,914		154,784		177,698
	$	213,645	$	879,111	$	1,092,756

Summary of Changes in Accretable Yields of Acquired Loans

The following is a summary of changes in the accretable yields of acquired loans during the nine months ended September 30, 2013 and 2012.

	September 30, 2013									September 30, 2012
(Dollars in thousands)	Acquired Impaired Loans			Acquired Performing Loans			Total Acquired Loans			Acquired Impaired Loans			Acquired Performing Loans			Total Acquired Loans
Balance at beginning of period	$	76,623		$	279,770		$	356,393		$	83,834		$	386,977		$	470,811
Transfers from nonaccretable difference to accretable yield		6,148			34,480			40,628			1,062			4,245			5,307
Accretion		(13,519	)		(119,193	)		(132,712	)		(21,924	)		(165,247	)		(187,171	)
Changes in expected cash flows not affecting nonaccretable differences (1)		10,561			81,173			91,734			10,964			46,197			57,161
Balance at end of period	$	79,813		$	276,230		$	356,043		$	73,936		$	272,172		$	346,108

(1) Includes changes in cash flows expected to be collected due to the impact of changes in actual or expected timing of liquidation events, loan modifications, changes in interest rates and changes in prepayment assumptions.

Schedule of Troubled Debt Restructurings

Information about the Company’s TDRs at September 30, 2013 and 2012 is presented in the following tables.

	September 30, 2013								September 30, 2012
	Accruing Loans								Accruing Loans
(Dollars in thousands)	Current		Past Due > 30 days		Nonaccrual TDRs		Total TDRs		Current		Past Due > 30 days		Nonaccrual TDRs		Total TDRs
Commercial real estate construction	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Commercial real estate - other		411		—		5,601		6,012		370		264		18,985		19,619
Commercial business		1,056		—		12,610		13,666		19		—		1,884		1,903
Residential prime		—		—		—		—		—		—		—		—
Residential subprime		—		—		—		—		—		—		—		—
Home equity		—		—		263		263		94		—		224		318
Indirect automobile		—		—		—		—		—		—		—		—
Credit card		—		—		—		—		—		—		—		—
Other		—		—		—		—		—		—		—		—
	$	1,467	$	—	$	18,474	$	19,941	$	483	$	264	$	21,093	$	21,840

Schedule of Modified TDRs

The following table provides information on how the TDRs were modified during the periods indicated.

	Nine Months Ended September 30
(Dollars in thousands)	2013		2012
Extended maturities	$	—	$	412
Interest rate adjustment		—		481
Maturity and interest rate adjustment		—		2,389
Movement to or extension of interest-rate only payments		—		939
Forbearance		11,210		170
	$	11,210	$	4,391

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, 2013 and December 31, 2012.

	September 30, 2013
	Non-covered loans excluding acquired loans
	Past Due (1)								Current		Total Non-covered Loans, Net of Unearned Income		Recorded Investment > 90 days and Accruing
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total
Commercial real estate construction	$	—	$	—	$	2,430	$	2,430	$	380,665	$	383,095	$	—
Commercial real estate - other		1,933		—		9,639		11,572		2,556,798		2,568,370		151
Commercial business		1,743		6		14,591		16,340		2,573,065		2,589,405		—
Residential prime		517		2,297		9,326		12,140		261,615		273,755		1,267
Residential subprime		—		—		442		442		115,715		116,157		—
Home equity		1,745		577		7,092		9,414		1,063,257		1,072,671		—
Indirect automobile		1,719		439		1,056		3,214		364,094		367,308		—
Credit card		184		102		425		711		59,225		59,936		—
Other		684		460		255		1,399		287,477		288,876		—
	$	8,525	$	3,881	$	45,256	$	57,662	$	7,661,911	$	7,719,573	$	1,418

⁽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.

	December 31, 2012
	Non-covered loans excluding acquired loans
	Past Due(1)										Total Non-covered Loans, Net of Unearned Income		Recorded Investment > 90 days and Accruing
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total		Current
Commercial real estate construction	$	60	$	—	$	5,479	$	5,539	$	288,137	$	293,676	$	—
Commercial real estate - other		3,590		—		23,559		27,149		2,224,495		2,251,644		83
Commercial business		1,430		13		3,687		5,130		2,362,304		2,367,434		329
Residential prime		662		1,156		9,168		10,986		185,843		196,829		801
Residential subprime		—		—		—		—		60,454		60,454		—
Home equity		2,283		796		5,793		8,872		991,766		1,000,638		158
Indirect automobile		1,624		326		868		2,818		320,148		322,966		—
Credit card		130		51		424		605		51,117		51,722		—
Other		566		105		310		981		201,161		202,142		—
	$	10,345	$	2,447	$	49,288	$	62,080	$	6,685,425	$	6,747,505	$	1,371

⁽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

The following tables provide an analysis of the aging of non-covered loans as of September 30, 2013 and December 31, 2012.

	September 30, 2013
	Non-covered acquired loans
	Past Due (1)													Total Non-covered Loans, Net of Unearned Income		Recorded Investment > 90 days and Accruing
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total		Current		Discount
Commercial real estate construction	$	97	$	—	$	3,457	$	3,554	$	15,020	$	(1,928	)	$	16,646	$	3,457
Commercial real estate - other		2,240		438		33,484		36,162		367,085		(51,025	)		352,222		33,484
Commercial business		444		246		1,880		2,570		59,949		(8,102	)		54,417		1,880
Residential prime		—		—		226		226		20,388		(586	)		20,028		226
Home equity		1,567		302		4,681		6,550		56,842		(4,193	)		59,199		4,681
Indirect automobile		86		1		102		189		2,258		—			2,447		102
Other		162		185		948		1,295		13,859		(3,651	)		11,503		948
	$	4,596	$	1,172	$	44,778	$	50,546	$	535,401	$	(69,485	)	$	516,462	$	44,778

⁽¹⁾  Past due information includes loans acquired from OMNI, Cameron and Florida Gulf at the gross loan balance, prior to application of discounts.

	December 31, 2012
	Non-covered acquired loans
	Past Due (1)													Total Non-covered Loans, Net of Unearned Income		Recorded Investment > 90 days and Accruing
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total		Current		Discount
Commercial real estate construction	$	369	$	—	$	4,067	$	4,436	$	29,098	$	(3,968	)	$	29,566	$	4,067
Commercial real estate - other		5,971		1,572		38,987		46,530		426,339		(57,055	)		415,814		38,987
Commercial business		1,410		524		3,953		5,887		89,490		(12,144	)		83,233		3,953
Residential prime		—		—		779		779		30,663		1,315			32,757		779
Home equity		2,379		382		4,354		7,115		73,658		(4,498	)		76,275		4,354
Indirect automobile		171		4		146		321		4,698		—			5,019		146
Other		202		17		495		714		21,746		(6,805	)		15,655		495
	$	10,502	$	2,499	$	52,781	$	65,782	$	675,692	$	(83,155	)	$	658,319	$	52,781

⁽¹⁾  Past due information includes loans acquired from OMNI, Cameron and Florida Gulf at the gross loan balance, prior to application of discounts.

TDRs [Member]

Schedule of Subsequently Defaulted TDRs

Information about the Company’s non-covered TDRs occurring in these periods is presented in the following table.

	September 30, 2013						September 30, 2012
(In thousands, except number of loans)	Number of Loans		Pre-modification Outstanding Recorded Investment		Post-modification Outstanding Recorded Investment (1)		Number of Loans		Pre-modification Outstanding Recorded Investment		Post-modification Outstanding Recorded Investment (1)
Commercial real estate		5	$	12,507	$	12,329		14	$	4,478	$	3,707
Commercial business		—		—		—		1		27		—
Residential prime		—		—		—		—		—		—
Home Equity		—		—		—		1		94		51
Indirect automobile		—		—		—		—		—		—
Credit card		—		—		—		—		—		—
Other		—		—		—		1		—		—
		5	$	12,507	$	12,329		17	$	4,599	$	3,758

	September 30, 2013				September 30, 2012
(In thousands, except number of loans)	Number of Loans		Recorded Investment		Number of Loans		Recorded Investment
Commercial real estate		45	$	6,012		46	$	19,048
Commercial business		13		12,370		8		1,883
Residential prime		—		—		—		—
Home Equity		1		47		2		275
Indirect automobile		—		—		—		—
Credit card		—		—		—		—
Other		1		—		1		—
		60	$	18,429		57	$	21,206

(1) Recorded investment includes any allowance for credit losses recorded on the TDRs at the dates indicated.

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Fair Value Measurements

9 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

Fair Value Measurements

NOTE 16 – FAIR VALUE MEASUREMENTS

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, 2013
Assets	(Level 1)		(Level 2)		(Level 3)		Total
Available for sale securities	$	15,220	$	1,949,169	$	—	$	1,964,389
Derivative instruments		—		32,469		—		32,469
Total	$	15,220	$	1,981,638	$	—	$	1,996,858
Liabilities
Derivative instruments		—		31,521		—		31,521
Total	$	—	$	31,521	$	—	$	31,521
(Dollars in thousands)	December 31, 2012
Assets	(Level 1)		(Level 2)		(Level 3)		Total
Available for sale securities	$	—	$	1,745,004	$	—	$	1,745,004
Derivative instruments		—		42,119		—		42,119
Total	$	—	$	1,787,123	$	—	$	1,787,123
Liabilities
Derivative instruments		—		36,890		—		36,890
Total	$	—	$	36,890	$	—	$	36,890

During 2013, available for sale securities with a market value of $15,220,000 were purchased and included in the Level 1 fair value measurement category in the table above. The security was issued by Fannie Mae and was included in the Level 1 category at September 30, 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) for the first nine months of 2013 related to assets and liabilities measured at fair value on a recurring basis are reported in noninterest 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)	$	(1,056	)	$	—
Change in unrealized gains (losses) relating to assets still held at September 30, 2013		—			(25,794	)

The Company has segregated all financial assets and liabilities that are measured at fair value on a nonrecurring 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.

	September 30, 2013
(Dollars in thousands)	(Level 1)		(Level 2)		(Level 3)		Total
Assets
Loans	$	—	$	1,932	$	—	$	1,932
Mortgage loans held for sale		—		3,213		—		3,213
OREO		—		20,427		—		20,427
Total	$	—	$	25,572	$	—	$	25,572

	December 31, 2012
(Dollars in thousands)	(Level 1)		(Level 2)		(Level 3)		Total
Assets
Loans	$	—	$	6,388	$	—	$	6,388
Mortgage loans held for sale		—		32,753		—		32,753
OREO		—		20,427		—		20,427
Total	$	—	$	59,568	$	—	$	59,568

The tables above exclude the initial measurement of assets and liabilities that were acquired as part of the Florida Gulf, OMNI, Cameron, and Florida Trust Company acquisitions completed in 2012 and 2011. These assets and liabilities were recorded at their fair value upon acquisition in accordance with generally-accepted accounting principles and were not re-measured during the periods presented unless specifically required by generally accepted accounting principles. 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, the Company records 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 $3,024,000 were recorded at their fair value at September 30, 2013. These loans include a reserve of $1,092,000 included in the Company’s allowance for credit losses at September 30, 2013. Impaired non-covered loans with an outstanding balance of $7,269,000 were recorded at their fair value at December 31, 2012. These loans include a reserve of $880,000 included in the Company’s allowance for credit losses at December 31, 2012.

During the second quarter of 2013, the Company announced plans to close ten branches during the second and third quarters of 2013 as part of its business strategy. The Company has notified customers of these branches and has received the required regulatory approvals to proceed with closure. The Company reviewed the carrying amount of the owned properties and concluded it exceeded the fair value of these branches at that date. As a result, the Company recorded an impairment loss in other noninterest expense of $0 in its consolidated statement of comprehensive income for the nine months ended September 30, 2013. After the impairment loss, the carrying value of the branches was $0 and is included in OREO (as real estate acquired for development or resale) on the Company’s consolidated balance sheet at September 30, 2013.

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.

The Company did not record any liabilities at fair value for which measurement of the fair value was made on a nonrecurring basis during the nine months ended September 30, 2013 and 2012.

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. The Company has currently chosen not to elect the fair value option for any items that are not already required to be measured at fair value in accordance with generally accepted accounting principles, and as such has not included any gains or losses in earnings for the nine months ended September 30, 2013 and 2012.

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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, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]
Weighted average basic shares outstanding, unvested restricted stock	547,155	563,061	559,556	554,041

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Derivative Instruments and Other Hedging Activities - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Cash as collateral for derivative transactions	$ 5,630,000	$ 2,650,000
Fair value of derivatives	$ 690,000

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Loans Receivable - Schedule of Loans Receivable (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Loans Receivable [Line Items]
Total loans receivable	$ 9,043,037	$ 8,498,580
Commercial Loans [Member]
Loans Receivable [Line Items]
Total loans receivable	6,464,083	6,169,261
Commercial Loans [Member] | Real Estate [Member]
Loans Receivable [Line Items]
Total loans receivable	3,779,839	3,631,543
Commercial Loans [Member] | Business [Member]
Loans Receivable [Line Items]
Total loans receivable	2,684,244	2,537,718
Residential Mortgage Loans [Member]
Loans Receivable [Line Items]
Total loans receivable	563,455	477,204
Residential Mortgage Loans [Member] | Residential 1-4 Family [Member]
Loans Receivable [Line Items]
Total loans receivable	555,869	471,183
Residential Mortgage Loans [Member] | Construction/ Owner Occupied [Member]
Loans Receivable [Line Items]
Total loans receivable	7,586	6,021
Consumer and Other Loans [Member]
Loans Receivable [Line Items]
Total loans receivable	2,015,499	1,852,115
Consumer and Other Loans [Member] | Home Equity [Member]
Loans Receivable [Line Items]
Total loans receivable	1,281,014	1,251,125
Consumer and Other Loans [Member] | Indirect Automobile [Member]
Loans Receivable [Line Items]
Total loans receivable	369,755	327,985
Consumer and Other Loans [Member] | Consumer - Other [Member]
Loans Receivable [Line Items]
Total loans receivable	364,730	273,005
Non-Covered Loans [Member]
Loans Receivable [Line Items]
Total loans receivable	8,236,035	7,405,824
Non-Covered Loans [Member] | Commercial Loans [Member]
Loans Receivable [Line Items]
Total loans receivable	5,964,155	5,441,367
Non-Covered Loans [Member] | Commercial Loans [Member] | Real Estate [Member]
Loans Receivable [Line Items]
Total loans receivable	3,320,333	2,990,700
Non-Covered Loans [Member] | Commercial Loans [Member] | Business [Member]
Loans Receivable [Line Items]
Total loans receivable	2,643,822	2,450,667
Non-Covered Loans [Member] | Residential Mortgage Loans [Member]
Loans Receivable [Line Items]
Total loans receivable	409,940	290,040
Non-Covered Loans [Member] | Residential Mortgage Loans [Member] | Residential 1-4 Family [Member]
Loans Receivable [Line Items]
Total loans receivable	402,354	284,019
Non-Covered Loans [Member] | Residential Mortgage Loans [Member] | Construction/ Owner Occupied [Member]
Loans Receivable [Line Items]
Total loans receivable	7,586	6,021
Non-Covered Loans [Member] | Consumer and Other Loans [Member]
Loans Receivable [Line Items]
Total loans receivable	1,861,940	1,674,417
Non-Covered Loans [Member] | Consumer and Other Loans [Member] | Home Equity [Member]
Loans Receivable [Line Items]
Total loans receivable	1,131,870	1,076,913
Non-Covered Loans [Member] | Consumer and Other Loans [Member] | Indirect Automobile [Member]
Loans Receivable [Line Items]
Total loans receivable	369,755	327,985
Non-Covered Loans [Member] | Consumer and Other Loans [Member] | Consumer - Other [Member]
Loans Receivable [Line Items]
Total loans receivable	360,315	269,519
Covered Loans [Member]
Loans Receivable [Line Items]
Total loans receivable	807,002	1,092,756
Covered Loans [Member] | Commercial Loans [Member]
Loans Receivable [Line Items]
Total loans receivable	499,928	727,894
Covered Loans [Member] | Commercial Loans [Member] | Real Estate [Member]
Loans Receivable [Line Items]
Total loans receivable	459,506	640,843
Covered Loans [Member] | Commercial Loans [Member] | Business [Member]
Loans Receivable [Line Items]
Total loans receivable	40,422	87,051
Covered Loans [Member] | Residential Mortgage Loans [Member]
Loans Receivable [Line Items]
Total loans receivable	153,515	187,164
Covered Loans [Member] | Residential Mortgage Loans [Member] | Residential 1-4 Family [Member]
Loans Receivable [Line Items]
Total loans receivable	153,515	187,164
Covered Loans [Member] | Residential Mortgage Loans [Member] | Construction/ Owner Occupied [Member]
Loans Receivable [Line Items]
Total loans receivable
Covered Loans [Member] | Consumer and Other Loans [Member]
Loans Receivable [Line Items]
Total loans receivable	153,559	177,698
Covered Loans [Member] | Consumer and Other Loans [Member] | Home Equity [Member]
Loans Receivable [Line Items]
Total loans receivable	149,144	174,212
Covered Loans [Member] | Consumer and Other Loans [Member] | Indirect Automobile [Member]
Loans Receivable [Line Items]
Total loans receivable
Covered Loans [Member] | Consumer and Other Loans [Member] | Consumer - Other [Member]
Loans Receivable [Line Items]
Total loans receivable	$ 4,415	$ 3,486

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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, 2013	Sep. 30, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	$ 251,603	$ 193,761
(Reversal of) Provision for loan losses	445	15,805
(Decrease) Increase in FDIC loss share receivable	(58,565)	33,786
Transfer of balance to OREO	(30,315)	(24,177)
Transfer of balance to the RULC	(9,828)
Loans charged off	(9,148)	(20,280)
Recoveries	4,353	2,492
Balance at end of period	148,545	201,387
Balance at beginning of period
Transfer of balance from the allowance for loan losses	9,828
Provision for unfunded commitments	2,131
Balance at end of period	11,959
Balance at end of period	8,894,492
Balance at end of period	8,246,977
Non-Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	83,027	74,861
(Reversal of) Provision for loan losses	420	12,323
Transfer of balance to OREO	(1,013)	(408)
Transfer of balance to the RULC	(9,828)
Loans charged off	(7,465)	(6,997)
Recoveries	4,353	2,473
Balance at end of period	69,494	82,252
Balance at beginning of period
Transfer of balance from the allowance for loan losses	9,828
Provision for unfunded commitments	2,131
Balance at end of period	11,959
Allowance on loans individually evaluated for impairment	1,092	1,541
Allowance on loans collectively evaluated for impairment	68,402	80,711
Balance at end of period	8,236,035	7,090,696
Balance at end of period individually evaluated for impairment	25,747	30,262
Balance at end of period collectively evaluated for impairment	8,210,288	7,060,434
Balance at end of period acquired with deteriorated credit quality	18,267	69,799
Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	168,576	118,900
(Reversal of) Provision for loan losses	25	3,482
(Decrease) Increase in FDIC loss share receivable	(58,565)	33,786
Transfer of balance to OREO	(29,302)	(23,769)
Transfer of balance to the RULC
Loans charged off	(1,683)	(13,283)
Recoveries		19
Balance at end of period	79,051	119,135
Balance at beginning of period
Transfer of balance from the allowance for loan losses
Provision for unfunded commitments
Balance at end of period
Allowance on loans individually evaluated for impairment
Allowance on loans collectively evaluated for impairment	79,051	119,135
Balance at end of period		1,139,250
Balance at end of period	807,002
Balance at end of period individually evaluated for impairment
Balance at end of period collectively evaluated for impairment	807,002	1,139,250
Balance at end of period acquired with deteriorated credit quality	78,484	221,960
Commercial Real Estate [Member] | Non-Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	38,264	35,604
(Reversal of) Provision for loan losses	(6,926)	4,199
Transfer of balance to OREO	(279)	(62)
Transfer of balance to the RULC	(2,939)
Loans charged off	(1,966)	(1,195)
Recoveries	1,498	790
Balance at end of period	27,652	39,336
Balance at beginning of period
Transfer of balance from the allowance for loan losses	2,939
Provision for unfunded commitments	1,207
Balance at end of period	4,146
Allowance on loans individually evaluated for impairment	8	1,173
Allowance on loans collectively evaluated for impairment	27,644	38,163
Balance at end of period	3,320,333	2,879,836
Balance at end of period individually evaluated for impairment	9,529	26,353
Balance at end of period collectively evaluated for impairment	3,310,804	2,853,483
Balance at end of period acquired with deteriorated credit quality	16,287	60,360
Commercial Real Estate [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	100,871	69,175
(Reversal of) Provision for loan losses	27	3,550
(Decrease) Increase in FDIC loss share receivable	(30,853)	24,229
Transfer of balance to OREO	(22,375)	(9,876)
Loans charged off	(1,683)	(13,143)
Recoveries		16
Balance at end of period	45,987	73,951
Allowance on loans individually evaluated for impairment
Allowance on loans collectively evaluated for impairment	45,987	73,951
Balance at end of period		670,001
Balance at end of period	459,506
Balance at end of period individually evaluated for impairment
Balance at end of period collectively evaluated for impairment	459,506	670,001
Balance at end of period acquired with deteriorated credit quality	23,751	171,965
Commercial Business [Member] | Non-Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	28,721	25,705
(Reversal of) Provision for loan losses	(582)	3,851
Transfer of balance to OREO	(81)
Transfer of balance to the RULC	(3,497)
Loans charged off	(531)	(769)
Recoveries	354	80
Balance at end of period	24,384	28,867
Balance at beginning of period
Transfer of balance from the allowance for loan losses	3,497
Provision for unfunded commitments	610
Balance at end of period	4,107
Allowance on loans individually evaluated for impairment	801	162
Allowance on loans collectively evaluated for impairment	23,583	28,705
Balance at end of period	2,643,822	2,357,303
Balance at end of period individually evaluated for impairment	14,548	1,888
Balance at end of period collectively evaluated for impairment	2,629,274	2,355,415
Balance at end of period acquired with deteriorated credit quality	45	3,675
Commercial Business [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	11,375	9,788
(Reversal of) Provision for loan losses		922
(Decrease) Increase in FDIC loss share receivable	(3,137)	2,398
Transfer of balance to OREO	(314)	(2,475)
Loans charged off
Recoveries
Balance at end of period	7,924	10,633
Allowance on loans individually evaluated for impairment
Allowance on loans collectively evaluated for impairment	7,924	10,633
Balance at end of period		91,822
Balance at end of period	40,422
Balance at end of period individually evaluated for impairment
Balance at end of period collectively evaluated for impairment	40,422	91,822
Balance at end of period acquired with deteriorated credit quality		3,522
Mortgage [Member] | Non-Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	2,125	897
(Reversal of) Provision for loan losses	1,048	1,344
Transfer of balance to OREO	(646)	(337)
Transfer of balance to the RULC	(40)
Loans charged off	(481)	(759)
Recoveries	698	30
Balance at end of period	2,704	1,175
Balance at beginning of period
Transfer of balance from the allowance for loan losses	40
Provision for unfunded commitments	38
Balance at end of period	78
Allowance on loans individually evaluated for impairment	283	163
Allowance on loans collectively evaluated for impairment	2,421	1,012
Balance at end of period	409,940	266,069
Balance at end of period individually evaluated for impairment	1,407	1,703
Balance at end of period collectively evaluated for impairment	408,533	264,366
Balance at end of period acquired with deteriorated credit quality	120	430
Consumer [Member] | Non-Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	13,917	12,655
(Reversal of) Provision for loan losses	6,880	2,929
Transfer of balance to OREO	(7)	(9)
Transfer of balance to the RULC	(3,352)
Loans charged off	(4,487)	(4,274)
Recoveries	1,803	1,573
Balance at end of period	14,754	12,874
Balance at beginning of period
Transfer of balance from the allowance for loan losses	3,352
Provision for unfunded commitments	276
Balance at end of period	3,628
Allowance on loans individually evaluated for impairment		43
Allowance on loans collectively evaluated for impairment	14,754	12,831
Balance at end of period	1,861,940	1,587,488
Balance at end of period individually evaluated for impairment	263	318
Balance at end of period collectively evaluated for impairment	1,861,677	1,587,170
Balance at end of period acquired with deteriorated credit quality	1,815	5,334
Consumer [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	33,764	18,753
(Reversal of) Provision for loan losses	(1)	397
(Decrease) Increase in FDIC loss share receivable	(18,841)	2,882
Transfer of balance to OREO	1	(825)
Loans charged off		(9)
Recoveries		3
Balance at end of period	14,923	21,201
Allowance on loans individually evaluated for impairment
Allowance on loans collectively evaluated for impairment	14,923	21,201
Balance at end of period		180,094
Balance at end of period	153,559
Balance at end of period individually evaluated for impairment
Balance at end of period collectively evaluated for impairment	153,559	180,094
Balance at end of period acquired with deteriorated credit quality	26,400	24,388
Unallocated [Member] | Non-Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period
(Reversal of) Provision for loan losses
Transfer of balance to OREO
Transfer of balance to the RULC
Loans charged off
Recoveries
Balance at end of period
Balance at beginning of period
Transfer of balance from the allowance for loan losses
Provision for unfunded commitments
Balance at end of period
Allowance on loans individually evaluated for impairment
Allowance on loans collectively evaluated for impairment
Balance at end of period
Balance at end of period individually evaluated for impairment
Balance at end of period collectively evaluated for impairment
Balance at end of period acquired with deteriorated credit quality
Unallocated [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period
(Reversal of) Provision for loan losses
(Decrease) Increase in FDIC loss share receivable
Transfer of balance to OREO
Loans charged off
Recoveries
Balance at end of period
Allowance on loans individually evaluated for impairment
Allowance on loans collectively evaluated for impairment
Balance at end of period
Balance at end of period
Balance at end of period individually evaluated for impairment
Balance at end of period collectively evaluated for impairment
Balance at end of period acquired with deteriorated credit quality
Mortgage [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	22,566	21,184
(Reversal of) Provision for loan losses	(1)	(1,387)
(Decrease) Increase in FDIC loss share receivable	(5,734)	4,277
Transfer of balance to OREO	(6,614)	(10,593)
Loans charged off		(131)
Recoveries
Balance at end of period	10,217	13,350
Allowance on loans individually evaluated for impairment
Allowance on loans collectively evaluated for impairment	10,217	13,350
Balance at end of period		197,333
Balance at end of period	153,515
Balance at end of period individually evaluated for impairment
Balance at end of period collectively evaluated for impairment	153,515	197,333
Balance at end of period acquired with deteriorated credit quality	$ 28,333	$ 22,085

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

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, 2013
Assets	(Level 1)		(Level 2)		(Level 3)		Total
Available for sale securities	$	15,220	$	1,949,169	$	—	$	1,964,389
Derivative instruments		—		32,469		—		32,469
Total	$	15,220	$	1,981,638	$	—	$	1,996,858
Liabilities
Derivative instruments		—		31,521		—		31,521
Total	$	—	$	31,521	$	—	$	31,521
(Dollars in thousands)	December 31, 2012
Assets	(Level 1)		(Level 2)		(Level 3)		Total
Available for sale securities	$	—	$	1,745,004	$	—	$	1,745,004
Derivative instruments		—		42,119		—		42,119
Total	$	—	$	1,787,123	$	—	$	1,787,123
Liabilities
Derivative instruments		—		36,890		—		36,890
Total	$	—	$	36,890	$	—	$	36,890

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) for the first nine months of 2013 related to assets and liabilities measured at fair value on a recurring basis are reported in noninterest 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)	$	(1,056	)	$	—
Change in unrealized gains (losses) relating to assets still held at September 30, 2013		—			(25,794	)

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 nonrecurring 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.

	September 30, 2013
(Dollars in thousands)	(Level 1)		(Level 2)		(Level 3)		Total
Assets
Loans	$	—	$	1,932	$	—	$	1,932
Mortgage loans held for sale		—		3,213		—		3,213
OREO		—		20,427		—		20,427
Total	$	—	$	25,572	$	—	$	25,572

	December 31, 2012
(Dollars in thousands)	(Level 1)		(Level 2)		(Level 3)		Total
Assets
Loans	$	—	$	6,388	$	—	$	6,388
Mortgage loans held for sale		—		32,753		—		32,753
OREO		—		20,427		—		20,427
Total	$	—	$	59,568	$	—	$	59,568

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Derivative Instruments and Other Hedging Activities (Tables)

9 Months Ended

Sep. 30, 2013

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Schedule of Outstanding Derivative Instruments

Information pertaining to outstanding derivative instruments is as follows:

	Balance Sheet Location	Asset Derivatives Fair Value				Balance Sheet Location	Liability Derivatives Fair Value
(Dollars in thousands)		September 30, 2013		December 31, 2012			September 30, 2013		December 31, 2012
Derivatives designated as hedging instruments under ASC Topic 815:
Interest rate contracts	Other assets	$	—	$	499	Other liabilities	$	—	$	1,843
Total derivatives designated as hedging instruments under ASC Topic 815		$	—	$	499		$	—	$	1,843
Derivatives not designated as hedging instruments under ASC Topic 815:
Interest rate contracts	Other assets	$	14,312	$	25,940	Other liabilities	$	14,312	$	25,940
Forward sales contracts	Other assets		148		2,774	Other liabilities		5,289		343
Written and purchased options	Other assets		18,009		12,906	Other liabilities		11,920		8,764
Total derivatives not designated as hedging instruments under ASC Topic 815		$	32,469	$	41,620		$	31,521	$	35,047
Total derivatives		$	32,469	$	42,119		$	31,521	$	36,890

	Asset Derivatives Notional Amount				Liability Derivatives Notional Amount
(Dollars in thousands)	September 30, 2013		December 31, 2012		September 30, 2013		December 31, 2012
Derivatives designated as hedging instruments under ASC Topic 815:
Interest rate contracts	$	—	$	35,000	$	—	$	35,000
Total derivatives designated as hedging instruments under ASC Topic 815	$	—	$	35,000	$	—	$	35,000
Derivatives not designated as hedging instruments under ASC Topic 815:
Interest rate contracts	$	376,374	$	374,536	$	376,374	$	374,536
Forward sales contracts		8,218		212,028		253,051		53,269
Written and purchased options		366,585		388,793		196,950		185,885
Total derivatives not designated as hedging instruments under ASC Topic 815	$	751,177	$	975,357	$	826,375	$	613,690
Total derivatives	$	751,177	$	1,010,357	$	826,375	$	648,690

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, 2013
	Gross Amounts Presented in the Balance Sheet		Gross Amounts Not Offset in the Balance Sheet					Net
(Dollars in thousands)			Derivatives		Collateral (1)
Derivatives subject to master netting arrangements
Derivative assets
Interest rate contracts designated as hedging instruments	$	—	$	—	$	—		$	—
Interest rate contracts not designated as hedging instruments		14,312		—		—			14,312
Written and purchased options		11,865		—		—			11,865
Total derivative assets subject to master netting arrangements	$	26,177	$	—	$	—		$	26,177
Derivative liabilities
Interest rate contracts designated as hedging instruments	$	—	$	—	$	—		$	—
Interest rate contracts not designated as hedging instruments		14,312		—		(5,658	)		8,654
Total derivative liabilities subject to master netting arrangements	$	14,312	$	—	$	(5,658	)	$	8,654

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

	December 31, 2012
	Gross Amounts Presented in the Balance Sheet		Gross Amounts Not Offset in the Balance Sheet						Net
(Dollars in thousands)			Derivatives			Collateral (1)
Derivatives subject to master netting arrangements
Derivative assets
Interest rate contracts designated as hedging instruments	$	499	$	(499	)	$	—		$	—
Interest rate contracts not designated as hedging instruments		25,940		—			—			25,940
Written and purchased options		8,763		—			—			8,763
Total derivative assets subject to master netting arrangements	$	35,202	$	(499	)	$	—		$	34,703
Derivative liabilities
Interest rate contracts designated as hedging instruments	$	1,843	$	(499	)	$	—		$	1,344
Interest rate contracts not designated as hedging instruments		25,940		—			(13,350	)		12,590
Total derivative liabilities subject to master netting arrangements	$	27,783	$	(499	)	$	(13,350	)	$	13,934

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

Schedule of Derivative Instruments on Consolidated Financial Statements

Information pertaining to the effect of the hedging instruments on the consolidated financial statements is as follows:

	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
(Dollars in thousands)	2013		2012				2013		2012				2013		2012
Derivatives in ASC Topic 815 Cash Flow Hedging Relationships
Interest rate contracts	$	—	$	(2,358	)	Other income (expense)	$	—	$	(408	)	Other income (expense)	$	—	$	—
	$	—	$	(2,358	)		$	—	$	(408	)		$	—	$	—

	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 Nine Months Ended September 30
(Dollars in thousands)	2013		2012				2013			2012				2013		2012
Derivatives in ASC Topic 815 Cash Flow Hedging Relationships
Interest rate contracts	$	—	$	(2,358	)	Other income (expense)	$	(392	)	$	(1,195	)	Other income (expense)	$	—	$	—
	$	—	$	(2,358	)		$	(392	)	$	(1,195	)		$	—	$	—

	Location of Gain (Loss) Recognized in Income on Derivatives		Amount of Gain (Loss) Recognized in Income on Derivatives
			For the Three Months Ended September 30						For the Nine Months Ended September 30
(Dollars in thousands)			2013			2012			2013			2012
Derivatives Not Designated as Hedging Instruments under ASC Topic 815
Interest rate contracts		Other income (expense)	$	2,061			247			2,542			627
Forward sales contracts		Mortgage Income		3,290			(1,887	)		897			(1,887	)
Written and purchased options		Mortgage Income		(7,896	)		3,378			(3,820	)		5,094
			$	(2,545	)	$	1,738		$	(381	)	$	3,834

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Other Comprehensive Income (Tables)

9 Months Ended

Sep. 30, 2013

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, 2013
(Dollars in thousands)	Before Tax		Tax Expense (Benefit)			Net-of-Tax 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 gains		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

	Three Months Ended September 30, 2012
(Dollars in thousands)	Before Tax			Tax Expense (Benefit)			Net-of-Tax Amount
Unrealized gain on securities:
Unrealized holding gains arising during the period	$	6,099		$	(2,135	)	$	3,964
Less: reclassification adjustment for gains included in net income		(41	)		14			(27	)
Net unrealized gains		6,058			(2,121	)		3,937
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	$	800		$	(280	)	$	520
Less: reclassification adjustment for losses included in net income		409			(142	)		267
Fair value of derivative instruments designated as cash flow hedges		1,209			(422	)		787
Total other comprehensive income	$	7,267		$	(2,543	)	$	4,724

	Nine Months Ended September 30, 2013
(Dollars in thousands)	Before Tax			Tax Expense (Benefit)			Net-of-Tax Amount
Unrealized loss 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	)
	Nine Months Ended September 30, 2012
(Dollars in thousands)	Before Tax			Tax Expense (Benefit)			Net-of-Tax Amount
Unrealized gain on securities:
Unrealized holding gains arising during the period	$	8,236		$	(2,883	)	$	5,353
Less: reclassification adjustment for gains included in net income		(3,743	)		1,310			(2,433	)
Net unrealized gains		4,493			(1,573	)		2,920
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	$	(1,882	)	$	659		$	(1,223	)
Less: reclassification adjustment for losses included in net income		1,195			(418	)		777
Fair value of derivative instruments designated as cash flow hedges		(687	)		241			(446	)
Total other comprehensive income	$	3,806		$	(1,332	)	$	2,474

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Loans Receivable

9 Months Ended

Sep. 30, 2013

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, 2013
(Dollars in thousands)	Non-covered loans		Covered loans		Total
Commercial loans:
Real estate	$	3,320,333	$	459,506	$	3,779,839
Business		2,643,822		40,422		2,684,244
		5,964,155		499,928		6,464,083
Residential mortgage loans:
Residential 1-4 family		402,354		153,515		555,869
Construction / Owner Occupied		7,586		—		7,586
		409,940		153,515		563,455
Consumer and other loans:
Home equity		1,131,870		149,144		1,281,014
Indirect automobile		369,755		—		369,755
Other		360,315		4,415		364,730
		1,861,940		153,559		2,015,499
	$	8,236,035	$	807,002	$	9,043,037

	December 31, 2012
(Dollars in thousands)	Non-covered loans		Covered loans		Total
Commercial loans:
Real estate	$	2,990,700	$	640,843	$	3,631,543
Business		2,450,667		87,051		2,537,718
		5,441,367		727,894		6,169,261
Residential mortgage loans:
Residential 1-4 family		284,019		187,164		471,183
Construction / Owner Occupied		6,021		—		6,021
		290,040		187,164		477,204
Consumer and other loans:
Home equity		1,076,913		174,212		1,251,125
Indirect automobile		327,985		—		327,985
Other		269,519		3,486		273,005
		1,674,417		177,698		1,852,115
	$	7,405,824	$	1,092,756	$	8,498,580

In 2009, the Company acquired substantially all of the assets and liabilities of CapitalSouth Bank (“CSB”), and certain assets and assumed certain deposit 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”). 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” in the information below and loans that are not subject to the loss share agreements as “non-covered loans.”

Deferred loan origination fees were $16,445,000 and $14,040,000 and deferred loan expenses were $7,154,000 and $5,270,000 at September 30, 2013 and December 31, 2012, 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, 2013 and December 31, 2012, overdrafts of $2,319,000 and $3,231,000, respectively, have been reclassified to loans receivable.

Loans with carrying values of $2.2 billion and $1.5 billion were pledged to secure public deposits and other borrowings at September 30, 2013 and December 31, 2012, respectively.

Non-covered Loans

The following tables provide an analysis of the aging of non-covered loans as of September 30, 2013 and December 31, 2012. Because of the difference in accounting for acquired loans, the tables below further segregate the Company’s non-covered loans receivable between loans acquired from Florida Gulf in 2012, as well as those acquired in 2011, 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, 2013
	Non-covered loans excluding acquired loans
	Past Due (1)								Current		Total Non-covered Loans, Net of Unearned Income		Recorded Investment > 90 days and Accruing
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total
Commercial real estate construction	$	—	$	—	$	2,430	$	2,430	$	380,665	$	383,095	$	—
Commercial real estate - other		1,933		—		9,639		11,572		2,556,798		2,568,370		151
Commercial business		1,743		6		14,591		16,340		2,573,065		2,589,405		—
Residential prime		517		2,297		9,326		12,140		261,615		273,755		1,267
Residential subprime		—		—		442		442		115,715		116,157		—
Home equity		1,745		577		7,092		9,414		1,063,257		1,072,671		—
Indirect automobile		1,719		439		1,056		3,214		364,094		367,308		—
Credit card		184		102		425		711		59,225		59,936		—
Other		684		460		255		1,399		287,477		288,876		—
	$	8,525	$	3,881	$	45,256	$	57,662	$	7,661,911	$	7,719,573	$	1,418

⁽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.

	December 31, 2012
	Non-covered loans excluding acquired loans
	Past Due(1)										Total Non-covered Loans, Net of Unearned Income		Recorded Investment > 90 days and Accruing
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total		Current
Commercial real estate construction	$	60	$	—	$	5,479	$	5,539	$	288,137	$	293,676	$	—
Commercial real estate - other		3,590		—		23,559		27,149		2,224,495		2,251,644		83
Commercial business		1,430		13		3,687		5,130		2,362,304		2,367,434		329
Residential prime		662		1,156		9,168		10,986		185,843		196,829		801
Residential subprime		—		—		—		—		60,454		60,454		—
Home equity		2,283		796		5,793		8,872		991,766		1,000,638		158
Indirect automobile		1,624		326		868		2,818		320,148		322,966		—
Credit card		130		51		424		605		51,117		51,722		—
Other		566		105		310		981		201,161		202,142		—
	$	10,345	$	2,447	$	49,288	$	62,080	$	6,685,425	$	6,747,505	$	1,371

⁽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, 2013
	Non-covered acquired loans
	Past Due (1)													Total Non-covered Loans, Net of Unearned Income		Recorded Investment > 90 days and Accruing
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total		Current		Discount
Commercial real estate construction	$	97	$	—	$	3,457	$	3,554	$	15,020	$	(1,928	)	$	16,646	$	3,457
Commercial real estate - other		2,240		438		33,484		36,162		367,085		(51,025	)		352,222		33,484
Commercial business		444		246		1,880		2,570		59,949		(8,102	)		54,417		1,880
Residential prime		—		—		226		226		20,388		(586	)		20,028		226
Home equity		1,567		302		4,681		6,550		56,842		(4,193	)		59,199		4,681
Indirect automobile		86		1		102		189		2,258		—			2,447		102
Other		162		185		948		1,295		13,859		(3,651	)		11,503		948
	$	4,596	$	1,172	$	44,778	$	50,546	$	535,401	$	(69,485	)	$	516,462	$	44,778

⁽¹⁾  Past due information includes loans acquired from OMNI, Cameron and Florida Gulf at the gross loan balance, prior to application of discounts.

	December 31, 2012
	Non-covered acquired loans
	Past Due (1)													Total Non-covered Loans, Net of Unearned Income		Recorded Investment > 90 days and Accruing
(Dollars in thousands)	30-59 days		60-89 days		> 90 days		Total		Current		Discount
Commercial real estate construction	$	369	$	—	$	4,067	$	4,436	$	29,098	$	(3,968	)	$	29,566	$	4,067
Commercial real estate - other		5,971		1,572		38,987		46,530		426,339		(57,055	)		415,814		38,987
Commercial business		1,410		524		3,953		5,887		89,490		(12,144	)		83,233		3,953
Residential prime		—		—		779		779		30,663		1,315			32,757		779
Home equity		2,379		382		4,354		7,115		73,658		(4,498	)		76,275		4,354
Indirect automobile		171		4		146		321		4,698		—			5,019		146
Other		202		17		495		714		21,746		(6,805	)		15,655		495
	$	10,502	$	2,499	$	52,781	$	65,782	$	675,692	$	(83,155	)	$	658,319	$	52,781

⁽¹⁾  Past due information includes loans acquired from OMNI, Cameron and Florida Gulf at the gross loan balance, prior to application of discounts.

Nonaccrual Loans

The following table provides the recorded investment of non-covered loans on nonaccrual status at September 30, 2013 and December 31, 2012. Nonaccrual loans in the table exclude acquired loans.

(Dollars in thousands)	September 30, 2013		December 31, 2012
Commercial real estate construction	$	2,430	$	5,479
Commercial real estate - other		9,488		23,475
Commercial business		14,591		3,358
Residential prime		8,501		8,367
Home equity		7,092		5,635
Indirect automobile		1,056		868
Credit card		425		424
Other		255		310
	$	43,838	$	47,916

Covered Loans

The carrying amount of the acquired covered loans at September 30, 2013 and December 31, 2012 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, 2013
(Dollars in thousands)	Acquired Impaired Loans		Acquired Performing Loans		Total Covered Loans
Commercial loans:
Real estate	$	23,751	$	435,755	$	459,506
Business		—		40,422		40,422
		23,751		476,177		499,928
Residential mortgage loans:
Residential 1-4 family		28,333		125,182		153,515
Construction / Owner Occupied		—		—		—
		28,333		125,182		153,515
Consumer and other loans:
Home equity		25,195		123,949		149,144
Indirect automobile		—		—		—
Other		1,205		3,210		4,415
		26,400		127,159		153,559
	$	78,484	$	728,518	$	807,002

	December 31, 2012
(Dollars in thousands)	Acquired Impaired Loans		Acquired Performing Loans		Total Covered Loans
Commercial loans:
Real estate	$	167,742	$	473,101	$	640,843
Business		2,757		84,294		87,051
		170,499		557,395		727,894
Residential mortgage loans:
Residential 1-4 family		20,232		166,932		187,164
Construction / Owner Occupied		—		—		—
		20,232		166,932		187,164
Consumer and other loans:
Home equity		22,094		152,118		174,212
Indirect automobile		—		—		—
Other		820		2,666		3,486
		22,914		154,784		177,698
	$	213,645	$	879,111	$	1,092,756

ASC 310-30 loans

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

The following is a summary of changes in the accretable yields of acquired loans during the nine months ended September 30, 2013 and 2012.

	September 30, 2013									September 30, 2012
(Dollars in thousands)	Acquired Impaired Loans			Acquired Performing Loans			Total Acquired Loans			Acquired Impaired Loans			Acquired Performing Loans			Total Acquired Loans
Balance at beginning of period	$	76,623		$	279,770		$	356,393		$	83,834		$	386,977		$	470,811
Transfers from nonaccretable difference to accretable yield		6,148			34,480			40,628			1,062			4,245			5,307
Accretion		(13,519	)		(119,193	)		(132,712	)		(21,924	)		(165,247	)		(187,171	)
Changes in expected cash flows not affecting nonaccretable differences (1)		10,561			81,173			91,734			10,964			46,197			57,161
Balance at end of period	$	79,813		$	276,230		$	356,043		$	73,936		$	272,172		$	346,108

(1) Includes changes in cash flows expected to be collected due to the impact of changes in actual or expected timing of liquidation events, loan modifications, changes in interest rates and changes in prepayment assumptions.

Accretable yield during the first nine months of 2013 increased primarily as a result of changes in expected cash flows not impacting the nonaccretable difference, offset by an increase in accretion recognized during the period. Accretable yield during the first nine months of 2012 decreased primarily as a result of the accretion recognized.

Troubled Debt Restructurings

Information about the Company’s TDRs at September 30, 2013 and 2012 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 the loans acquired in the OMNI and Cameron acquisitions completed during 2011 and certain loans acquired from Florida Gulf in 2012. 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 loans and loans acquired from OMNI and Cameron, and certain Florida Gulf loans that would otherwise meet the criteria for classification as a troubled debt restructuring are excluded from the tables below.

	September 30, 2013								September 30, 2012
	Accruing Loans								Accruing Loans
(Dollars in thousands)	Current		Past Due > 30 days		Nonaccrual TDRs		Total TDRs		Current		Past Due > 30 days		Nonaccrual TDRs		Total TDRs
Commercial real estate construction	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Commercial real estate - other		411		—		5,601		6,012		370		264		18,985		19,619
Commercial business		1,056		—		12,610		13,666		19		—		1,884		1,903
Residential prime		—		—		—		—		—		—		—		—
Residential subprime		—		—		—		—		—		—		—		—
Home equity		—		—		263		263		94		—		224		318
Indirect automobile		—		—		—		—		—		—		—		—
Credit card		—		—		—		—		—		—		—		—
Other		—		—		—		—		—		—		—		—
	$	1,467	$	—	$	18,474	$	19,941	$	483	$	264	$	21,093	$	21,840

At September 30, 2013, TDRs totaling $19,941,000 included $11,210,000 of TDRs that occurred during the current nine-month period through modification of the original loan terms. Total TDRs of $21,840,000 at September 30, 2012 included $4,391,000 of TDRs that occurred during the nine-month period ended September 30, 2012. The following table provides information on how the TDRs were modified during the periods indicated.

	Nine Months Ended September 30
(Dollars in thousands)	2013		2012
Extended maturities	$	—	$	412
Interest rate adjustment		—		481
Maturity and interest rate adjustment		—		2,389
Movement to or extension of interest-rate only payments		—		939
Forbearance		11,210		170
	$	11,210	$	4,391

Information about the Company’s non-covered TDRs occurring in these periods is presented in the following table.

	September 30, 2013						September 30, 2012
(In thousands, except number of loans)	Number of Loans		Pre-modification Outstanding Recorded Investment		Post-modification Outstanding Recorded Investment (1)		Number of Loans		Pre-modification Outstanding Recorded Investment		Post-modification Outstanding Recorded Investment (1)
Commercial real estate		5	$	12,507	$	12,329		14	$	4,478	$	3,707
Commercial business		—		—		—		1		27		—
Residential prime		—		—		—		—		—		—
Home Equity		—		—		—		1		94		51
Indirect automobile		—		—		—		—		—		—
Credit card		—		—		—		—		—		—
Other		—		—		—		1		—		—
		5	$	12,507	$	12,329		17	$	4,599	$	3,758

(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, 2013				September 30, 2012
(In thousands, except number of loans)	Number of Loans		Recorded Investment		Number of Loans		Recorded Investment
Commercial real estate		45	$	6,012		46	$	19,048
Commercial business		13		12,370		8		1,883
Residential prime		—		—		—		—
Home Equity		1		47		2		275
Indirect automobile		—		—		—		—
Credit card		—		—		—		—
Other		1		—		1		—
		60	$	18,429		57	$	21,206

XML

Loans Receivable - Schedule of Subsequently Defaulted TDRs (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013 SecurityLoan	Sep. 30, 2012 SecurityLoan
TDRs Occurring During The Period [Member] | Non-Covered TDRs [Member]
Loans Receivable [Line Items]
Number of Loans	5	17
Pre-modification Outstanding Recorded Investment	$ 12,507	$ 4,599
Post-modification Outstanding Recorded Investment	12,329	3,758
TDRs That Subsequently Defaulted In Past 12 Months [Member]
Loans Receivable [Line Items]
Number of Loans	60	57
Recorded Investment	18,429	21,206
Real Estate [Member] | Commercial Loans [Member] | TDRs Occurring During The Period [Member] | Non-Covered TDRs [Member]
Loans Receivable [Line Items]
Number of Loans	5	14
Pre-modification Outstanding Recorded Investment	12,507	4,478
Post-modification Outstanding Recorded Investment	12,329	3,707
Real Estate [Member] | Commercial Loans [Member] | TDRs That Subsequently Defaulted In Past 12 Months [Member]
Loans Receivable [Line Items]
Number of Loans	45	46
Recorded Investment	6,012	19,048
Business [Member] | Commercial Loans [Member] | TDRs Occurring During The Period [Member] | Non-Covered TDRs [Member]
Loans Receivable [Line Items]
Number of Loans		1
Pre-modification Outstanding Recorded Investment		27
Post-modification Outstanding Recorded Investment
Business [Member] | Commercial Loans [Member] | TDRs That Subsequently Defaulted In Past 12 Months [Member]
Loans Receivable [Line Items]
Number of Loans	13	8
Recorded Investment	12,370	1,883
Residential Prime [Member] | Residential Mortgage Loans [Member] | TDRs Occurring During The Period [Member] | Non-Covered TDRs [Member]
Loans Receivable [Line Items]
Number of Loans
Pre-modification Outstanding Recorded Investment
Post-modification Outstanding Recorded Investment
Residential Prime [Member] | Residential Mortgage Loans [Member] | TDRs That Subsequently Defaulted In Past 12 Months [Member]
Loans Receivable [Line Items]
Number of Loans
Recorded Investment
Home Equity [Member] | Consumer and Other Loans [Member] | TDRs Occurring During The Period [Member] | Non-Covered TDRs [Member]
Loans Receivable [Line Items]
Number of Loans		1
Pre-modification Outstanding Recorded Investment		94
Post-modification Outstanding Recorded Investment		51
Home Equity [Member] | Consumer and Other Loans [Member] | TDRs That Subsequently Defaulted In Past 12 Months [Member]
Loans Receivable [Line Items]
Number of Loans	1	2
Recorded Investment	47	275
Indirect Automobile [Member] | Consumer and Other Loans [Member] | TDRs Occurring During The Period [Member] | Non-Covered TDRs [Member]
Loans Receivable [Line Items]
Number of Loans
Pre-modification Outstanding Recorded Investment
Post-modification Outstanding Recorded Investment
Indirect Automobile [Member] | Consumer and Other Loans [Member] | TDRs That Subsequently Defaulted In Past 12 Months [Member]
Loans Receivable [Line Items]
Number of Loans
Recorded Investment
Credit Card [Member] | Consumer and Other Loans [Member] | TDRs Occurring During The Period [Member] | Non-Covered TDRs [Member]
Loans Receivable [Line Items]
Number of Loans
Pre-modification Outstanding Recorded Investment
Post-modification Outstanding Recorded Investment
Credit Card [Member] | Consumer and Other Loans [Member] | TDRs That Subsequently Defaulted In Past 12 Months [Member]
Loans Receivable [Line Items]
Number of Loans
Recorded Investment
Consumer - Other [Member] | Consumer and Other Loans [Member] | TDRs Occurring During The Period [Member] | Non-Covered TDRs [Member]
Loans Receivable [Line Items]
Number of Loans		1
Pre-modification Outstanding Recorded Investment
Post-modification Outstanding Recorded Investment
Consumer - Other [Member] | Consumer and Other Loans [Member] | TDRs That Subsequently Defaulted In Past 12 Months [Member]
Loans Receivable [Line Items]
Number of Loans	1	1
Recorded Investment

XML

Share-Based Compensation - Schedule of Share and Dividend Equivalent Share Award Activity (Parenthetical) (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Market price of Company's stock	$ 51.91	$ 45.80

XML

Allowance for Credit Losses and Credit Quality (Tables)

9 Months Ended

Sep. 30, 2013

Effect of Change in Methodology on the Company's Unaudited Consolidated Financial Statements

The following table presents the effect of the change in methodology on the Company’s unaudited consolidated financial statements as of September 30, 2013.

(Dollars in thousands)	Current Methodology		Previous Methodolgy		Difference			Per Share Difference
Selected Data
Allowance for loan losses	$	64,165	$	73,992	$	(9,827	)
Reserve for unfunded lending commitments		11,959		—		11,959
Allowance for credit losses	$	76,124	$	73,992	$	2,132
(Reversal of)Provision for loan losses	$	2,884	$	2,883	$	1		$	(0.00	)
Provision for unfunded lending commitments		2,131		—		2,131			0.05
Total provision for credit losses	$	5,015	$	2,883	$	2,132		$	0.05

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 is as follows:

	September 30, 2013
	Non-covered loans
(Dollars in thousands)	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 benefit 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
Decrease in FDIC loss share receivable		—			—			(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 at 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

	September 30, 2012
	Non-covered loans
	Excluding Acquired Loans			Acquired Loans			Covered Loans			Total
Allowance for loan losses
Balance at beginning of period	$	74,861		$	—		$	118,900		$	193,761
(Reversal of) Provision for loan losses before benefit attributable to FDIC loss share agreements		6,518			5,805			37,268			49,591
Adjustment attributable to FDIC loss share arrangements		—			—			(33,786	)		(33,786	)
Net (reversal of) provision for loan losses		6,518			5,805			3,482			15,805
Increase in FDIC loss share receivable		—			—			33,786			33,786
Transfer of balance to OREO		—			(408	)		(23,769	)		(24,177	)
Loans charged-off		(6,818	)		(179	)		(13,283	)		(20,280	)
Recoveries		2,455			18			19			2,492
Balance at end of period	$	77,016		$	5,236		$	119,135		$	201,387

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, is as follows:

	September 30, 2013
(Dollars in thousands)	Commercial real estate			Commercial business			Mortgage			Consumer			Unallocated		Total
Allowance for loan 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

	September 30, 2012
(Dollars in thousands)	Commercial real estate			Commercial business			Mortgage			Consumer			Unallocated		Total
Allowance for credit losses
Balance at beginning of period	$	35,604		$	25,705		$	897		$	12,655		$	—	$	74,861
(Reversal of) Provision for loan losses		4,199			3,851			1,344			2,929			—		12,323
Transfer of balance to OREO		(62	)		—			(337	)		(9	)		—		(408	)
Loans charged off		(1,195	)		(769	)		(759	)		(4,274	)		—		(6,997	)
Recoveries		790			80			30			1,573			—		2,473
Balance at end of period	$	39,336		$	28,867		$	1,175		$	12,874		$	—	$	82,252
Allowance on loans individually evaluated for impairment	$	1,173		$	162		$	163		$	43		$	—	$	1,541
Allowance on loans collectively evaluated for impairment		38,163			28,705			1,012			12,831			—		80,711
Loans, net of unearned income:
Balance at end of period	$	2,879,836		$	2,357,303		$	266,069		$	1,587,488		$	—	$	7,090,696
Balance at end of period individually evaluated for impairment		26,353			1,888			1,703			318			—		30,262
Balance at end of period collectively evaluated for impairment		2,853,483			2,355,415			264,366			1,587,170			—		7,060,434
Balance at end of period acquired with deteriorated credit quality		60,360			3,675			430			5,334			—		69,799

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, is as follows:

	September 30, 2013
(Dollars in thousands)	Commercial real estate			Commercial business			Mortgage			Consumer			Unallocated		Total
Allowance for loan 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

	September 30, 2012
(Dollars in thousands)	Commercial real estate			Commercial business			Mortgage			Consumer			Unallocated		Total
Allowance for credit losses
Balance at beginning of period	$	69,175		$	9,788		$	21,184		$	18,753		$	—	$	118,900
(Reversal of) Provision for loan losses		3,550			922			(1,387	)		397			—		3,482
(Decrease) Increase in FDIC loss share receivable		24,229			2,398			4,277			2,882			—		33,786
Transfer of balance to OREO		(9,876	)		(2,475	)		(10,593	)		(825	)		—		(23,769	)
Loans charged off		(13,143	)		—			(131	)		(9	)		—		(13,283	)
Recoveries		16			—			—			3			—		19
Balance at end of period	$	73,951		$	10,633		$	13,350		$	21,201		$	—	$	119,135
Allowance on loans individually evaluated for impairment	$	—		$	—		$	—		$	—		$	—	$	—
Allowance on loans collectively evaluated for impairment		73,951			10,633			13,350			21,201			—		119,135
Loans, net of unearned income:
Balance at end of period	$	670,001		$	91,822		$	197,333		$	180,094		$	—	$	1,139,250
Balance at end of period individually evaluated for impairment		—			—			—			—			—		—
Balance at end of period collectively evaluated for impairment		670,001			91,822			197,333			180,094			—		1,139,250
Balance at end of period acquired with deteriorated credit quality		171,965			3,522			22,085			24,388			—		221,960

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

Asset risk classifications for commercial loans reflect the classification as of September 30, 2013 and December 31, 2012.

	Non-covered loans excluding acquired loans
	September 30, 2013										December 31, 2012
(Dollars in thousands)	Pass		Special Mention		Substandard		Doubtful		Total		Pass		Special Mention		Substandard		Doubtful		Total
Commercial real estate construction	$	374,458	$	4,800	$	3,837	$	—	$	383,095	$	269,842	$	16,767	$	7,067	$	—	$	293,676
Commercial real estate - other		2,503,820		37,537		26,896		117		2,568,370		2,162,989		40,547		47,710		398		2,251,644
Commercial business		2,546,614		9,013		32,825		953		2,589,405		2,295,788		21,640		49,958		48		2,367,434
Total	$	5,424,892	$	51,350	$	63,558	$	1,070		5,540,870	$	4,728,619	$	78,954	$	104,735	$	446	$	4,912,754

	Non-covered loans excluding acquired loans
	September 30, 2013						December 31, 2012
(Dollars in thousands)	Current		30+ Days Past Due		Total		Current		30+ Days Past Due		Total
Residential prime	$	261,615	$	12,140	$	273,755	$	185,843	$	10,986	$	196,829
Residential subprime		115,715		442		116,157		60,454		—		60,454
Home equity		1,063,257		9,414		1,072,671		991,766		8,872		1,000,638
Indirect automobile		364,094		3,214		367,308		320,148		2,818		322,966
Credit card		59,225		711		59,936		51,117		605		51,722
Consumer - other		287,477		1,399		288,876		201,161		981		202,142
	$	2,151,383	$	27,320	$	2,178,703	$	1,810,489	$	24,262	$	1,834,751

Schedule of Investment in Impaired Loan

Information on the Company’s investment in impaired loans is presented in the following tables as of and for the periods indicated.

	September 30, 2013							December 31, 2012
(Dollars in thousands)	Recorded Investment		Unpaid Principal Balance		Related Allowance			Recorded Investment		Unpaid Principal Balance		Related Allowance
With no related allowance recorded:
Commercial real estate	$	9,392	$	9,392	$	—		$	26,151	$	26,151	$	—
Commercial business		13,068		13,068		—			1,824		1,824		—
Home equity		263		263		—			—		—		—
With an allowance recorded:
Commercial real estate		2,913		2,937		(24	)		3,464		3,663		(199	)
Commercial business		2,569		2,579		(10	)		1,334		1,810		(476	)
Residential prime		9,575		9,908		(333	)		9,861		10,070		(209	)
Home equity		6,784		6,829		(45	)		5,860		5,951		(91	)
Indirect automobile		1,050		1,056		(6	)		865		868		(3	)
Credit card		417		425		(8	)		413		424		(11	)
Other		252		255		(3	)		307		310		(3	)
	$	46,283	$	46,712	$	(429	)	$	50,079	$	51,071	$	(992	)
Total commercial loans		27,942		27,976		(34	)		32,773		33,448		(675	)
Total mortgage loans		9,575		9,908		(333	)		9,861		10,070		(209	)
Total consumer loans		8,766		8,828		(62	)		7,445		7,553		(108	)

	For the Three Months Ended September 30								For the Nine Months Ended September 30
	2013				2012				2013				2012
(Dollars in thousands)	Average Recorded Investment		Interest Income Recognized (1)		Average Recorded Investment		Interest Income Recognized (1)		Average Recorded Investment		Interest Income Recognized (1)		Average Recorded Investment		Interest Income Recognized (1)
With no related allowance recorded:
Commercial real estate	$	10,703	$	6	$	27,547	$	15	$	12,787	$	22	$	29,872	$	651
Commercial business		13,218		17		2,451		—		8,608		59		3,387		71
Home Equity		265		—		225		—		287		—		227		—
With an allowance recorded:
Commercial real estate		4,346		—		2,731		8		6,092		5		2,866		22
Commercial business		2,739		—		209		1		2,746		3		215		1
Residential prime		9,650		—		9,248		—		9,380		7		7,439		148
Home equity		7,244		—		6,184		—		7,458		14		6,502		110
Indirect automobile		1,349		—		1,135		—		1,610		22		1,345		20
Credit card		424		—		387		—		426		—		354		—
Other		372		—		585		—		446		4		675		6
	$	50,310	$	23	$	50,702	$	24	$	49,840	$	136	$	52,882	$	1,029
Total commercial loans		31,006		23		32,938		24		30,233		89		36,340		745
Total mortgage loans		9,650		—		9,248		—		9,380		7		7,439		148
Total consumer loans		9,654		—		8,516		—		10,227		40		9,103		136

(1) Interest income recognized on impaired loans represents income recognized before loans were placed on nonaccrual status.

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 discounts in the tables below represent the adjustment of covered loans to fair value at the date, as adjusted for income accretion and changes in cash flow estimates in subsequent periods.

	Covered loans
	September 30, 2013											December 31, 2012
(Dollars in thousands)	Pass		Special Mention		Substandard		Doubtful		Total			Pass		Special Mention		Substandard		Doubtful		Total
Commercial real estate construction	$	44,312	$	8,093	$	42,849	$	497	$	95,751		$	46,201	$	9,888	$	97,315	$	607	$	154,011
Commercial real estate - other		146,103		56,182		194,785		7,496		404,566			201,261		65,498		279,171		8,530		554,460
Commercial business		33,112		958		17,201		1,277		52,548			38,552		8,600		50,018		451		97,621
Total	$	223,527	$	65,233	$	254,835	$	9,270	$	552,865		$	286,014	$	83,986	$	426,504	$	9,588	$	806,092
Discount										(52,937	)										(78,198	)
									$	499,928										$	727,894

	Covered loans
	September 30, 2013									December 31, 2012
(Dollars in thousands)	Current		30+ Days Past Due		Premium (discount)			Total		Current		30+ Days Past Due		Premium (discount)			Total
Residential prime	$	164,214	$	33,114	$	(43,813	)	$	153,515	$	183,795	$	52,379	$	(49,010	)	$	187,164
Home equity		150,302		41,683		(42,841	)		149,144		168,729		65,997		(60,514	)		174,212
Credit card		665		36		—			701		841		65		—			906
Consumer - other		643		204		2,867			3,714		1,154		1,523		(97	)		2,580
	$	315,824	$	75,037	$	(83,787	)	$	307,074	$	354,519	$	119,964	$	(109,621	)	$	364,862

Covered Loans [Member]

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

	Non-covered acquired loans
	September 30, 2013													December 31, 2012
(Dollars in thousands)	Pass		Special Mention		Substandard		Doubtful		Discount			Total		Pass		Special Mention		Substandard		Doubtful		Discount			Total
Commercial real estate construction	$	12,900	$	1,321	$	4,353	$	—	$	(1,928	)	$	16,646	$	25,896	$	2,410	$	5,228	$	—	$	(3,968	)	$	29,566
Commercial real estate - other		320,781		18,438		63,816		212		(51,025	)		352,222		359,046		28,185		85,420		218		(57,055	)		415,814
Commercial business		56,465		2,241		3,725		88		(8,102	)		54,417		86,201		2,159		4,808		2,209		(12,144	)		83,233
Total	$	390,146	$	22,000	$	71,894	$	300	$	(61,055	)	$	423,285	$	471,143	$	32,754	$	95,456	$	2,427	$	(73,167	)	$	528,613

	Non-covered acquired loans
	September 30, 2013									December 31, 2012
(Dollars in thousands)	Current		30+ Days Past Due		Premium (discount)			Total		Current		30+ Days Past Due		Premium (discount)			Total
Residential prime	$	20,388	$	226	$	(586	)	$	20,028	$	30,663	$	779	$	1,315		$	32,757
Home equity		56,842		6,550		(4,193	)		59,199		73,658		7,115		(4,498	)		76,275
Indirect automobile		2,258		189		—			2,447		4,698		321		—			5,019
Consumer - other		13,859		1,295		(3,651	)		11,503		21,746		714		(6,805	)		15,655
	$	93,347	$	8,260	$	(8,430	)	$	93,177	$	130,765	$	8,929	$	(9,988	)	$	129,706

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Recent Accounting Pronouncements - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013
Accounting Policies [Abstract]
Amortization expense	$ 5,496,000	$ 15,916,000

XML

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

9 Months Ended

Sep. 30, 2013

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 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)	2013			2012
Balance at beginning of period	$	267,475		$	153,013
Originations		1,712,557			1,749,121
Sales		(1,871,747	)		(1,691,002	)
Balance at end of period	$	108,285		$	211,132

(Dollars in thousands)	2013			2012
Fair value changes of derivatives and mortgage loans held for sale, net	$	(270	)	$	2,954
Gains on sales		51,709			51,828
Servicing and other income, net		402			336
	$	51,841		$	55,118

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:

	September 30, 2013							December 31, 2012
(Dollars in thousands)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Mortgage servicing rights	$	1,816	$	(543	)	$	1,273	$	1,234	$	(304	)	$	930

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Commitments and Contingencies - Summary of Financial Instruments Outstanding (Detail) (Credit Risk Contract [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Credit Risk Contract [Member]
Commitments Contingencies And Guarantees [Line Items]
Commitments to grant loans	$ 342,494	$ 192,295
Unfunded commitments under lines of credit	2,972,046	2,372,971
Commercial and standby letters of credit	106,652	62,207
Reserve for unfunded lending commitments	$ 11,959

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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, 2013	Dec. 31, 2012
Goodwill [Line Items]
Gross Carrying Amount	$ 46,754	$ 46,754
Accumulated Amortization	(30,238)	(26,694)
Net Carrying Amount	16,516	20,060
Core Deposit Intangibles [Member]
Goodwill [Line Items]
Gross Carrying Amount	45,406	45,406
Accumulated Amortization	(29,659)	(26,284)
Net Carrying Amount	15,747	19,122
Customer Relationship Intangible Asset [Member]
Goodwill [Line Items]
Gross Carrying Amount	1,348	1,348
Accumulated Amortization	(579)	(410)
Net Carrying Amount	$ 769	$ 938

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Investment Securities

9 Months Ended

Sep. 30, 2013

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, 2013
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	407,049	$	1,878	$	(7,127	)	$	401,800
Obligations of state and political obligations		109,509		2,967		(235	)		112,241
Mortgage-backed securities		1,449,275		14,928		(15,337	)		1,448,866
Other securities		1,460		22		—			1,482
Total securities available for sale	$	1,967,293	$	19,795	$	(22,699	)	$	1,964,389
Securities held to maturity:
U.S. Government-sponsored enterprise obligations	$	34,471	$	650	$	—		$	35,121
Obligations of state and political obligations		84,471		1,735		(1,425	)		84,781
Mortgage-backed securities		36,736		293		(1,621	)		35,408
Total securities held to maturity	$	155,678	$	2,678	$	(3,046	)	$	155,310

	December 31, 2012
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	281,746	$	4,364	$	(386	)	$	285,724
Obligations of state and political obligations		120,680		6,573		(178	)		127,075
Mortgage-backed securities		1,303,030		29,108		(1,482	)		1,330,656
Other securities		1,460		89		—			1,549
Total securities available for sale	$	1,706,916	$	40,134	$	(2,046	)	$	1,745,004
Securities held to maturity:
U.S. Government-sponsored enterprise obligations	$	69,949	$	1,244	$	—		$	71,193
Obligations of state and political obligations		88,909		4,730		(113	)		93,526
Mortgage-backed securities		46,204		728		(153	)		46,779
Total securities held to maturity	$	205,062	$	6,702	$	(266	)	$	211,498

Securities with carrying values of $1.4 billion and $1.7 billion were pledged to secure public deposits and other borrowings at September 30, 2013 and December 31, 2012, 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 and ability 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, 2013
	Less Than Twelve Months					Over Twelve Months					Total
(Dollars in thousands)	Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	(7,127	)	$	274,195	$	—		$	—	$	(7,127	)	$	274,195
Obligations of state and political obligations		(10	)		326		(225	)		1,047		(235	)		1,373
Mortgage-backed securities		(14,096	)		671,684		(1,241	)		38,600		(15,337	)		710,284
Total securities available for sale	$	(21,233	)	$	946,205	$	(1,466	)	$	39,647	$	(22,699	)	$	985,852
Securities held to maturity:
Obligations of state and political obligations	$	(1,308	)	$	28,433	$	(117	)	$	2,080	$	(1,425	)	$	30,513
Mortgage-backed securities		(850	)		15,490		(771	)		9,805		(1,621	)		25,295
Total securities held to maturity	$	(2,158	)	$	43,923	$	(888	)	$	11,885	$	(3,046	)	$	55,808

	December 31, 2012
	Less Than Twelve Months					Over Twelve Months					Total
(Dollars in thousands)	Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	(386	)	$	59,741	$	—		$	—	$	(386	)	$	59,741
Obligations of state and political obligations		—			—		(178	)		1,094		(178	)		1,094
Mortgage-backed securities		(1,473	)		180,027		(9	)		3,919		(1,482	)		183,946
Total securities available for sale	$	(1,859	)	$	239,768	$	(187	)	$	5,013	$	(2,046	)	$	244,781
Securities held to maturity:
Obligations of state and political obligations	$	(113	)	$	8,242	$	—		$	—	$	(113	)	$	8,242
Mortgage-backed securities		(153	)		16,262		—			—		(153	)		16,262
Total securities held to maturity	$	(266	)	$	24,504	$	—		$	—	$	(266	)	$	24,504

The Company assessed the nature of the losses in its portfolio as of September 30, 2013 and December, 31, 2012 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 bond discussed below, in each instance, management has determined the cost basis of the securities would be fully recoverable. Management also has the intent and ability 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, 2013, 151 debt securities had unrealized losses of 2.41% of the securities’ amortized cost basis and 1.21% of the Company’s total amortized cost basis. The unrealized losses for each of the 151 securities relate to market interest rate changes. 13 of the 151 securities have been in a continuous loss position for over twelve months at September 30, 2013. These 13 securities had an aggregate amortized cost basis and unrealized loss of $53,886,000 and $2,354,000, respectively. Ten of the 13 securities were issued by either the Federal National Mortgage Association (Fannie Mae), the Federal Home Loan Mortgage Corporation (Freddie Mac), or the Government National Mortgage Association (Ginnie Mae). The Fannie Mae, Freddie Mac, and Ginnie Mae securities are rated AA+ by S&P and Aaa by Moodys. Three of the securities in a continuous loss position for over twelve months were issued by political subdivisions. One of the bond issuers has a credit rating of A+ by S&P. In addition, the bond is insured by a Aaa rated insurer and as a result, the Company concluded that an other-than-temporary impairment charge was not required at September 30, 2013. The second bond in a continuous unrealized loss position for over twelve months carries an issue rating of Aa2 by Moody’s, and is also insured by the same Aaa rated insurer, and as a result, the Company concluded that an other-than-temporary impairment charge was not required at September 30, 2013. The remaining security in a continuous unrealized loss position for over twelve months was issued by a political subdivision and is discussed in further detail below.

At December 31, 2012, 49 debt securities had unrealized losses of 0.85% of the securities’ amortized cost basis and 0.12% of the Company’s total amortized cost basis. The unrealized losses for each of the 49 securities relate to market interest rate changes. Three of the 49 securities had been in a continuous loss position for over twelve months at December 31, 2012. These three securities had an aggregate amortized cost basis and unrealized loss of $5,200,000 and $187,000, respectively. Two of the three securities were issued by either the Federal National Mortgage Association (Fannie Mae), Federal Home Loan Mortgage Corporation (Freddie Mac), or the Government National Mortgage Association (Ginnie Mae). The Fannie Mae, Freddie Mac, and Ginnie Mae securities are rated AA+ by S&P and Aaa by Moodys. One of the securities in a continuous unrealized loss position for over twelve months was issued by a political subdivision and is discussed in further detail below.

Prior to 2012, management assessed the operating environment of a bond issuer as adverse and concluded that the Company had one unrated revenue municipal bond that warranted an other-than-temporary impairment charge. The specific impairment was related to the loss of the contracted revenue source required for bond repayment. The Company determined the impairment charge using observable market data for similar assets, including third party valuation of the security, as well as information from unobservable inputs, including its best estimate of the recoverability of the amortized cost of the security as outlined above. 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 for the year ended December 31, 2011. The Company recorded total impairment of 50% of the par value of the bond and provided a fair value of the bonds that was consistent with current market pricing. During the first nine months of 2013, the Company continued to analyze the operating environment of the bond as it did in 2012 and 2011 and noted no further deterioration in the operating environment of the bond issuer.

During the nine months ended September 30, 2013 and 2012, 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 other declines in the estimated fair value of the Company’s investment securities were deemed to be other-than-temporary at September 30, 2013 or December 31, 2012.

The amortized cost and estimated fair value of investment securities by maturity at September 30, 2013 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.

	Securities Available for Sale							Securities Held to Maturity
(Dollars in thousands)	Weighted Average Yield			Amortized Cost		Estimated Fair Value		Weighted Average Yield			Amortized Cost		Estimated Fair Value
Within one year or less		1.99	%	$	16,230	$	16,430		1.85	%	$	24,541	$	24,815
One through five years		1.38			220,047		220,114		3.01			18,071		18,685
After five through ten years		1.98			596,282		597,600		2.60			24,599		25,040
Over ten years		1.92			1,134,734		1,130,245		2.92			88,467		86,770
		1.88	%	$	1,967,293	$	1,964,389		2.71	%	$	155,678	$	155,310

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 September 30					Nine Months Ended September 30
(Dollars in thousands)	2013			2012		2013			2012
Realized gains	$	—		$	41	$	2,369		$	3,758
Realized losses		(3	)		—		(110	)		(15	)
	$	(3	)	$	41	$	2,259		$	3,743

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

Other Equity Securities

The Company included the following securities in “Other assets” on the consolidated balance sheets:

(Dollars in thousands)	September 30 2013		December 31 2012
Federal Home Loan Bank (FHLB) stock	$	12,759	$	16,860
Federal Reserve Bank (FRB) stock		28,098		28,155
Other investments		1,306		1,201
	$	42,163	$	46,216

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Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash Flows from Operating Activities
Net income	$ 39,499	$ 53,187
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	19,851
Amortization of purchase accounting adjustments, net	(1,186)
Provision for loan losses	445	15,805
Share-based equity compensation expense	(7,999)	(7,306)
(Gain) loss on sale of assets	(51)
Gain on sale of available for sale investments	(2,259)
Gain on sale of OREO	(5,211)
Loss on abandonment of fixed assets	4,941
Impairment	31,813
Amortization of premium/discount on investments	15,426
Derivative (gains) losses on swaps	(209)
Benefit for deferred income taxes	(7,802)
Originations of mortgage loans held for sale	(1,712,557)
Proceeds from sales of mortgage loans held for sale	1,923,455
Gain on sale of mortgage loans held for sale, net	(51,709)
Tax benefit associated with share-based payment arrangements	(495)
(Increase) decrease in other assets	(15,759)
Other operating activities, net	30,079
Net Cash Provided by Operating Activities	276,270
Cash Flows from Investing Activities
Proceeds from sales of securities available for sale	44,672
Proceeds from maturities, prepayments and calls of securities available for sale	618,059
Purchases of securities available for sale	(935,341)
Proceeds from maturities, prepayments and calls of securities held to maturity	54,372
Purchases of securities held to maturity	(5,901)
FDIC reimbursement of recoverable covered asset losses	56,311
Increase in loans receivable, net	(595,315)
Proceeds from sale of premises and equipment	7,371
Purchases of premises and equipment	(12,592)
Proceeds from disposition of real estate owned	76,150
Investment in new market tax credit entities	(1,696)
Cash received in excess of cash paid for acquisition
Other investing activities, net	8,963
Net Cash Used in Investing Activities	(684,947)
Cash Flows from Financing Activities
Increase in deposits, net of deposits acquired	202,959
Net change in short-term borrowings, net of borrowings acquired	(44,196)
Proceeds from long-term debt	2,230
Repayments of long-term debt	(143,625)
Dividends paid to shareholders	(30,223)
Proceeds from sale of treasury stock for stock options exercised	5,441	1,541
Payments to repurchase common stock	(1,933)
Tax benefit associated with share-based payment arrangements	495	940
Net Cash (Used in) Provided by Financing Activities	(8,852)
Net (Decrease) Increase In Cash and Cash Equivalents	(417,529)
Cash and Cash Equivalents at Beginning of Period	970,977
Cash and Cash Equivalents at End of Period	553,448
Supplemental Schedule of Noncash Activities
Acquisition of real estate in settlement of loans	82,383
Common stock issued in acquisition
Transfers of property into Other Real Estate	82,383
Supplemental Disclosures
Interest on deposits and borrowings	36,888
Income taxes, net	19,891
Restated [Member]
Cash Flows from Operating Activities
Net income		53,187
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		15,870
Amortization of purchase accounting adjustments, net		(27,896)
Provision for loan losses		15,805
Share-based equity compensation expense		(7,306)
(Gain) loss on sale of assets		144
Gain on sale of available for sale investments		(3,743)
Gain on sale of OREO		(4,083)
Loss on abandonment of fixed assets		2,743
Impairment
Amortization of premium/discount on investments		15,365
Derivative (gains) losses on swaps		1
Benefit for deferred income taxes		(5,264)
Originations of mortgage loans held for sale		(1,749,121)
Proceeds from sales of mortgage loans held for sale		1,742,830
Gain on sale of mortgage loans held for sale, net		(51,828)
Tax benefit associated with share-based payment arrangements		(940)
(Increase) decrease in other assets		9,823
Other operating activities, net		23,826
Net Cash Provided by Operating Activities		44,025
Cash Flows from Investing Activities
Proceeds from sales of securities available for sale		153,397
Proceeds from maturities, prepayments and calls of securities available for sale		739,734
Purchases of securities available for sale		(795,178)
Proceeds from maturities, prepayments and calls of securities held to maturity		40,071
Purchases of securities held to maturity		(37,236)
FDIC reimbursement of recoverable covered asset losses		114,564
Increase in loans receivable, net		(630,229)
Proceeds from sale of premises and equipment		355
Purchases of premises and equipment		(22,922)
Proceeds from disposition of real estate owned		80,282
Investment in new market tax credit entities		(20,000)
Cash received in excess of cash paid for acquisition		32,425
Other investing activities, net		6,088
Net Cash Used in Investing Activities		(338,649)
Cash Flows from Financing Activities
Increase in deposits, net of deposits acquired		339,379
Net change in short-term borrowings, net of borrowings acquired		126,136
Proceeds from long-term debt		23,449
Repayments of long-term debt		(74,920)
Dividends paid to shareholders		(30,053)
Proceeds from sale of treasury stock for stock options exercised		1,541
Payments to repurchase common stock		(42,078)
Tax benefit associated with share-based payment arrangements		940
Net Cash (Used in) Provided by Financing Activities		344,394
Net (Decrease) Increase In Cash and Cash Equivalents		49,770
Cash and Cash Equivalents at Beginning of Period		573,296
Cash and Cash Equivalents at End of Period		623,066
Supplemental Schedule of Noncash Activities
Acquisition of real estate in settlement of loans		82,780
Common stock issued in acquisition		39,203
Transfers of property into Other Real Estate		82,780
Supplemental Disclosures
Interest on deposits and borrowings		49,529
Income taxes, net		$ 10,902

XML

Commitments and Contingencies - Additional Information (Detail) (USD $)	Sep. 30, 2013
Commitments Contingencies And Guarantees [Line Items]
Fair value of guarantees under commercial and standby letters of credit	$ 1,067,000
Minimum [Member]
Commitments Contingencies And Guarantees [Line Items]
Estimated losses associated with legal proceedings	500,000
Maximum [Member]
Commitments Contingencies And Guarantees [Line Items]
Estimated losses associated with legal proceedings	$ 2,200,000

XML

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, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Investments Debt And Equity Securities [Abstract]
Realized gains		$ 41	$ 2,369	$ 3,758
Realized losses	(3)		(110)	(15)
Net realized gains	$ (3)	$ 41	$ 2,259	$ 3,743

XML

Acquisition and Disposition Activity - Schedule of Branch Closure Costs (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Business Combinations [Abstract]
Employee termination	$ (70)	$ 384	$ 299	$ 384
Accelerated depreciation	352	284	1,033	284
Contract termination	591		591
Impairment	323	2,743	4,941	2,743
Total	$ 1,196	$ 3,411	$ 6,864	$ 3,411

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Share-Based Compensation - Compensation Expense Included in Salaries and Employee Benefits 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, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Compensation expense related to stock options	$ 526	$ 334	$ 1,592	$ 1,317
Income tax benefit related to stock options	$ 184	$ 117	$ 557	$ 461
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

XML

Goodwill and Other Acquired Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2013

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Carrying Amount of Goodwill

Changes to the carrying amount of goodwill for the year ended December 31, 2012 and the nine months ended September 30, 2013 are provided in the following table.

(Dollars in thousands)
Balance, December 31, 2011	$	369,811
Goodwill acquired during the year		32,420
Goodwill adjustment to correct an immaterial error		(359	)
Balance, December 31, 2012		401,872
Goodwill acquired during the period		—
Balance, September 30, 2013	$	401,872

XML

Fair Value of Financial Instruments - Estimated Fair Values and Carrying Amounts of Financial Instruments (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Financial Assets
Cash and cash equivalents	$ 553,448	$ 970,977
FDIC loss share receivable	204,885	423,069
Financial Liabilities
Deposits	10,950,764	10,748,277
Short-term borrowings	258,850	303,045
Long-term debt	281,101	423,377
Carrying Amount [Member]
Financial Assets
Cash and cash equivalents	553,447	970,977
Investment securities	2,120,067	1,950,066
Loans and loans held for sale	9,151,322	8,766,054
FDIC loss share receivable	204,885	423,069
Derivative instruments	32,469	42,119
Accrued interest receivable	31,296	32,183
Financial Liabilities
Deposits	10,950,764	10,748,277
Short-term borrowings	258,850	303,045
Long-term debt	281,101	423,377
Derivative instruments	31,521	36,890
Accrued interest payable	6,026	6,615
Fair Value [Member]
Financial Assets
Cash and cash equivalents	553,447	970,977
Investment securities	2,119,699	1,956,502
Loans and loans held for sale	9,257,560	8,800,563
FDIC loss share receivable	59,512	207,222
Derivative instruments	32,469	42,119
Accrued interest receivable	31,296	32,183
Financial Liabilities
Deposits	10,533,414	10,594,885
Short-term borrowings	258,850	303,045
Long-term debt	239,506	394,490
Derivative instruments	31,521	36,890
Accrued interest payable	$ 6,026	$ 6,615

XML

Share-Based Compensation - Additional Information (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation maximum option term (in years)	10 years
Future awards shares under approved incentive compensation plans	491,346
Minimum vesting period (in years)	1 year 6 months
Maximum vesting period (in years)	7 years
Excess tax benefits as financing cash inflows	$ 495,000	$ 940,000
Net cash proceeds from exercise of stock options	5,441,000	1,541,000
Aggregate intrinsic value of shares underlying outstanding stock options	2,090,000
Aggregate intrinsic value of shares underlying exercisable stock options	1,951,000
Total intrinsic value of options exercised	1,920,000	1,046,000
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unearned compensation vesting period (in years)	7
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unearned compensation vesting period (in years)	3
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
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unearned share-based compensation associated with awards	4,485,000
Unrecognized compensation cost related to stock options expected to be recognized over a weighted-average period	4 years 8 months 12 days
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unearned share-based compensation associated with awards	$ 23,253,000

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Share-Based Compensation - Schedule of Share and Dividend Equivalent Share Award Activity (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of share equivalents, Beginning Balance	318,729	232,921
Number of share equivalents, Granted	166,664	117,506
Number of share equivalents, Forfeited share equivalents	(16,381)	(8,052)
Number of share equivalents, Vested share equivalents	(45,065)	(16,735)
Number of share equivalents, Ending Balance	423,947	325,640
Dividend equivalents, Beginning Balance	16,035	8,942
Dividend equivalents, Granted	8,793	6,852
Dividend equivalents, Forfeited share equivalents	(681)	(242)
Dividend equivalents, Vested share equivalents	(3,327)	(1,144)
Dividend equivalents, Ending Balance	20,820	14,408
Dividend equivalents, Beginning Balance	334,764	241,863
Dividend equivalents, Granted	175,457	124,358
Dividend equivalents, Forfeited share equivalents	(17,062)	(8,294)
Dividend equivalents, Vested share equivalents	(48,392)	(17,879)
Dividend equivalents, Ending Balance	444,767	340,048
Value of share equivalents, Beginning Balance	$ 16,444,000	$ 11,924,000
Value of share equivalents, Granted	9,108,000	5,696,000
Value of share equivalents, Forfeited share equivalents	(886,000)	(380,000)
Value of share equivalents, Vested share equivalents	(2,453,000)	(894,000)
Value of share equivalents, Ending Balance	$ 23,088,000	$ 15,574,000

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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, 2013	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	$ 8,236,035	$ 7,405,824
Total	807,002	1,092,756
Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	7,661,911	6,685,425
30+ Days Past Due	57,662	62,080
Total	2,178,703	1,834,751
Internally Assigned Grade Loss [Member] | Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	5,540,870	4,912,754
Internally Assigned Grade Loss [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	552,865	806,092
Discount	(52,937)	(78,198)
Total	499,928	727,894
Pass [Member] | Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	5,424,892	4,728,619
Pass [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	223,527	286,014
Special Mention [Member] | Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	51,350	78,954
Special Mention [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	65,233	83,986
Substandard [Member] | Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	63,558	104,735
Substandard [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	254,835	426,504
Doubtful [Member] | Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	1,070	446
Doubtful [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	9,270	9,588
Residential Prime [Member] | Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	261,615	185,843
30+ Days Past Due	12,140	10,986
Total	273,755	196,829
Home Equity [Member] | Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	1,063,257	991,766
30+ Days Past Due	9,414	8,872
Total	1,072,671	1,000,638
Indirect Automobile [Member] | Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	364,094	320,148
30+ Days Past Due	3,214	2,818
Total	367,308	322,966
Consumer - Other [Member] | Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	287,477	201,161
30+ Days Past Due	1,399	981
Total	288,876	202,142
Commercial Real Estate Construction [Member] | Internally Assigned Grade Loss [Member] | Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	383,095	293,676
Commercial Real Estate Construction [Member] | Internally Assigned Grade Loss [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	95,751	154,011
Commercial Real Estate Construction [Member] | Pass [Member] | Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	374,458	269,842
Commercial Real Estate Construction [Member] | Pass [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	44,312	46,201
Commercial Real Estate Construction [Member] | Special Mention [Member] | Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	4,800	16,767
Commercial Real Estate Construction [Member] | Special Mention [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	8,093	9,888
Commercial Real Estate Construction [Member] | Substandard [Member] | Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	3,837	7,067
Commercial Real Estate Construction [Member] | Substandard [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	42,849	97,315
Commercial Real Estate Construction [Member] | Doubtful [Member] | Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification
Commercial Real Estate Construction [Member] | Doubtful [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	497	607
Commercial Real Estate - Other [Member] | Internally Assigned Grade Loss [Member] | Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	2,568,370	2,251,644
Commercial Real Estate - Other [Member] | Internally Assigned Grade Loss [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	404,566	554,460
Commercial Real Estate - Other [Member] | Pass [Member] | Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	2,503,820	2,162,989
Commercial Real Estate - Other [Member] | Pass [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	146,103	201,261
Commercial Real Estate - Other [Member] | Special Mention [Member] | Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	37,537	40,547
Commercial Real Estate - Other [Member] | Special Mention [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	56,182	65,498
Commercial Real Estate - Other [Member] | Substandard [Member] | Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	26,896	47,710
Commercial Real Estate - Other [Member] | Substandard [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	194,785	279,171
Commercial Real Estate - Other [Member] | Doubtful [Member] | Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	117	398
Commercial Real Estate - Other [Member] | Doubtful [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	7,496	8,530
Commercial Business [Member] | Internally Assigned Grade Loss [Member] | Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	2,589,405	2,367,434
Commercial Business [Member] | Internally Assigned Grade Loss [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	52,548	97,621
Commercial Business [Member] | Pass [Member] | Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	2,546,614	2,295,788
Commercial Business [Member] | Pass [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	33,112	38,552
Commercial Business [Member] | Special Mention [Member] | Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	9,013	21,640
Commercial Business [Member] | Special Mention [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	958	8,600
Commercial Business [Member] | Substandard [Member] | Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	32,825	49,958
Commercial Business [Member] | Substandard [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	17,201	50,018
Commercial Business [Member] | Doubtful [Member] | Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	953	48
Commercial Business [Member] | Doubtful [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	1,277	451
Residential Subprime [Member] | Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	115,715	60,454
30+ Days Past Due	442
Total	116,157	60,454
Credit Card [Member] | Non-Covered Loans Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	59,225	51,117
30+ Days Past Due	711	605
Total	59,936	51,722
Non-Covered Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	93,347	130,765
30+ Days Past Due	8,260	8,929
Discount	(8,430)	(9,988)
Total	93,177	129,706
Non-Covered Acquired Loans [Member] | Internally Assigned Grade Loss [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Discount	(61,055)	(73,167)
Total	423,285	528,613
Non-Covered Acquired Loans [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	390,146	471,143
Non-Covered Acquired Loans [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	22,000	32,754
Non-Covered Acquired Loans [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	71,894	95,456
Non-Covered Acquired Loans [Member] | Doubtful [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	300	2,427
Non-Covered Acquired Loans [Member] | Residential Prime [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	20,388	30,663
30+ Days Past Due	226	779
Discount	(586)	1,315
Total	20,028	32,757
Non-Covered Acquired Loans [Member] | Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	56,842	73,658
30+ Days Past Due	6,550	7,115
Discount	(4,193)	(4,498)
Total	59,199	76,275
Non-Covered Acquired Loans [Member] | Indirect Automobile [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	2,258	4,698
30+ Days Past Due	189	321
Discount
Total	2,447	5,019
Non-Covered Acquired Loans [Member] | Consumer - Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	13,859	21,746
30+ Days Past Due	1,295	714
Discount	(3,651)	(6,805)
Total	11,503	15,655
Non-Covered Acquired Loans [Member] | Commercial Real Estate Construction [Member] | Internally Assigned Grade Loss [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Discount	(1,928)	(3,968)
Total	16,646	29,566
Non-Covered Acquired Loans [Member] | Commercial Real Estate Construction [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	12,900	25,896
Non-Covered Acquired Loans [Member] | Commercial Real Estate Construction [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	1,321	2,410
Non-Covered Acquired Loans [Member] | Commercial Real Estate Construction [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	4,353	5,228
Non-Covered Acquired Loans [Member] | Commercial Real Estate Construction [Member] | Doubtful [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification
Non-Covered Acquired Loans [Member] | Commercial Real Estate - Other [Member] | Internally Assigned Grade Loss [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Discount	(51,025)	(57,055)
Total	352,222	415,814
Non-Covered Acquired Loans [Member] | Commercial Real Estate - Other [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	320,781	359,046
Non-Covered Acquired Loans [Member] | Commercial Real Estate - Other [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	18,438	28,185
Non-Covered Acquired Loans [Member] | Commercial Real Estate - Other [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	63,816	85,420
Non-Covered Acquired Loans [Member] | Commercial Real Estate - Other [Member] | Doubtful [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	212	218
Non-Covered Acquired Loans [Member] | Commercial Business [Member] | Internally Assigned Grade Loss [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Discount	(8,102)	(12,144)
Total	54,417	83,233
Non-Covered Acquired Loans [Member] | Commercial Business [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	56,465	86,201
Non-Covered Acquired Loans [Member] | Commercial Business [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	2,241	2,159
Non-Covered Acquired Loans [Member] | Commercial Business [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	3,725	4,808
Non-Covered Acquired Loans [Member] | Commercial Business [Member] | Doubtful [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit quality indicator by asset risk classification	88	2,209
Mortgage [Member] | Residential Prime [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	164,214	183,795
30+ Days Past Due	33,114	52,379
Discount	(43,813)	(49,010)
Mortgage [Member] | Residential Prime [Member] | Internally Assigned Grade Loss [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	153,515	187,164
Consumer Loans [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	315,824	354,519
30+ Days Past Due	75,037	119,964
Discount	(83,787)	(109,621)
Consumer Loans [Member] | Internally Assigned Grade Loss [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	307,074	364,862
Consumer Loans [Member] | Home Equity [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	150,302	168,729
30+ Days Past Due	41,683	65,997
Discount	(42,841)	(60,514)
Consumer Loans [Member] | Home Equity [Member] | Internally Assigned Grade Loss [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	149,144	174,212
Consumer Loans [Member] | Consumer - Other [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	643	1,154
30+ Days Past Due	204	1,523
Discount	2,867	(97)
Consumer Loans [Member] | Consumer - Other [Member] | Internally Assigned Grade Loss [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	3,714	2,580
Consumer Loans [Member] | Credit Card [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Credit risk by payment status, Current	665	841
30+ Days Past Due	36	65
Discount
Consumer Loans [Member] | Credit Card [Member] | Internally Assigned Grade Loss [Member] | Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	$ 701	$ 906

XML

Loans Receivable - Summary of Changes in Accretable Yields of Acquired Loans (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Loans Receivable [Line Items]
Balance	$ 356,393	$ 470,811
Transfers from nonaccretable difference to accretable yield	40,628	5,307
Accretion	(132,712)	(187,171)
Changes in expected cash flows not affecting nonaccretable differences	91,734	57,161
Balance	356,043	346,108
Acquired Impaired Loans [Member]
Loans Receivable [Line Items]
Balance	76,623	83,834
Transfers from nonaccretable difference to accretable yield	6,148	1,062
Accretion	(13,519)	(21,924)
Changes in expected cash flows not affecting nonaccretable differences	10,561	10,964
Balance	79,813	73,936
Acquired Performing Loans [Member]
Loans Receivable [Line Items]
Balance	279,770	386,977
Transfers from nonaccretable difference to accretable yield	34,480	4,245
Accretion	(119,193)	(165,247)
Changes in expected cash flows not affecting nonaccretable differences	81,173	46,197
Balance	$ 276,230	$ 272,172

XML

Share-Based Compensation - Estimate Fair Value of Share-Based Awards with Weighted-Average Assumptions (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions And Methodology [Abstract]
Expected dividends	2.60%	2.30%
Expected volatility	34.80%	33.90%
Risk-free interest rate	1.70%	2.90%
Expected term (in years)	8 years 7 months 6 days	5 years 9 months 18 days
Weighted-average grant-date fair value	$ 15.37	$ 13.58

XML

Derivative Instruments and Other Hedging Activities

9 Months Ended

Sep. 30, 2013

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:

	Balance Sheet Location	Asset Derivatives Fair Value				Balance Sheet Location	Liability Derivatives Fair Value
(Dollars in thousands)		September 30, 2013		December 31, 2012			September 30, 2013		December 31, 2012
Derivatives designated as hedging instruments under ASC Topic 815:
Interest rate contracts	Other assets	$	—	$	499	Other liabilities	$	—	$	1,843
Total derivatives designated as hedging instruments under ASC Topic 815		$	—	$	499		$	—	$	1,843
Derivatives not designated as hedging instruments under ASC Topic 815:
Interest rate contracts	Other assets	$	14,312	$	25,940	Other liabilities	$	14,312	$	25,940
Forward sales contracts	Other assets		148		2,774	Other liabilities		5,289		343
Written and purchased options	Other assets		18,009		12,906	Other liabilities		11,920		8,764
Total derivatives not designated as hedging instruments under ASC Topic 815		$	32,469	$	41,620		$	31,521	$	35,047
Total derivatives		$	32,469	$	42,119		$	31,521	$	36,890

	Asset Derivatives Notional Amount				Liability Derivatives Notional Amount
(Dollars in thousands)	September 30, 2013		December 31, 2012		September 30, 2013		December 31, 2012
Derivatives designated as hedging instruments under ASC Topic 815:
Interest rate contracts	$	—	$	35,000	$	—	$	35,000
Total derivatives designated as hedging instruments under ASC Topic 815	$	—	$	35,000	$	—	$	35,000
Derivatives not designated as hedging instruments under ASC Topic 815:
Interest rate contracts	$	376,374	$	374,536	$	376,374	$	374,536
Forward sales contracts		8,218		212,028		253,051		53,269
Written and purchased options		366,585		388,793		196,950		185,885
Total derivatives not designated as hedging instruments under ASC Topic 815	$	751,177	$	975,357	$	826,375	$	613,690
Total derivatives	$	751,177	$	1,010,357	$	826,375	$	648,690

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, 2013 and December 31, 2012, the Company was required to post $5,630,000 and $2,650,000, 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, 2013. 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 agreement to the non-defaulting entity upon an event of default of the counterparty, including bankruptcy, insolvency, or similar proceeding, and (2) provide the non-defaulting entity the right to accelerate, terminate, and close-out on a net basis all transactions under the agreement and to liquidate or set-off collateral promptly upon an event of default of the counterparty. As permitted by generally-accepted accounting principles, 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, 2013
	Gross Amounts Presented in the Balance Sheet		Gross Amounts Not Offset in the Balance Sheet					Net
(Dollars in thousands)			Derivatives		Collateral (1)
Derivatives subject to master netting arrangements
Derivative assets
Interest rate contracts designated as hedging instruments	$	—	$	—	$	—		$	—
Interest rate contracts not designated as hedging instruments		14,312		—		—			14,312
Written and purchased options		11,865		—		—			11,865
Total derivative assets subject to master netting arrangements	$	26,177	$	—	$	—		$	26,177
Derivative liabilities
Interest rate contracts designated as hedging instruments	$	—	$	—	$	—		$	—
Interest rate contracts not designated as hedging instruments		14,312		—		(5,658	)		8,654
Total derivative liabilities subject to master netting arrangements	$	14,312	$	—	$	(5,658	)	$	8,654

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

	December 31, 2012
	Gross Amounts Presented in the Balance Sheet		Gross Amounts Not Offset in the Balance Sheet						Net
(Dollars in thousands)			Derivatives			Collateral (1)
Derivatives subject to master netting arrangements
Derivative assets
Interest rate contracts designated as hedging instruments	$	499	$	(499	)	$	—		$	—
Interest rate contracts not designated as hedging instruments		25,940		—			—			25,940
Written and purchased options		8,763		—			—			8,763
Total derivative assets subject to master netting arrangements	$	35,202	$	(499	)	$	—		$	34,703
Derivative liabilities
Interest rate contracts designated as hedging instruments	$	1,843	$	(499	)	$	—		$	1,344
Interest rate contracts not designated as hedging instruments		25,940		—			(13,350	)		12,590
Total derivative liabilities subject to master netting arrangements	$	27,783	$	(499	)	$	(13,350	)	$	13,934

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

During the nine months ended September 30, 2013 and 2012, 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, 2013, the fair value of derivatives that will mature within the next twelve months is $690,000. 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.

Information pertaining to the effect of the hedging instruments on the consolidated financial statements is as follows:

	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
(Dollars in thousands)	2013		2012				2013		2012				2013		2012
Derivatives in ASC Topic 815 Cash Flow Hedging Relationships
Interest rate contracts	$	—	$	(2,358	)	Other income (expense)	$	—	$	(408	)	Other income (expense)	$	—	$	—
	$	—	$	(2,358	)		$	—	$	(408	)		$	—	$	—

	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 Nine Months Ended September 30
(Dollars in thousands)	2013		2012				2013			2012				2013		2012
Derivatives in ASC Topic 815 Cash Flow Hedging Relationships
Interest rate contracts	$	—	$	(2,358	)	Other income (expense)	$	(392	)	$	(1,195	)	Other income (expense)	$	—	$	—
	$	—	$	(2,358	)		$	(392	)	$	(1,195	)		$	—	$	—

	Location of Gain (Loss) Recognized in Income on Derivatives		Amount of Gain (Loss) Recognized in Income on Derivatives
			For the Three Months Ended September 30						For the Nine Months Ended September 30
(Dollars in thousands)			2013			2012			2013			2012
Derivatives Not Designated as Hedging Instruments under ASC Topic 815
Interest rate contracts		Other income (expense)	$	2,061			247			2,542			627
Forward sales contracts		Mortgage Income		3,290			(1,887	)		897			(1,887	)
Written and purchased options		Mortgage Income		(7,896	)		3,378			(3,820	)		5,094
			$	(2,545	)	$	1,738		$	(381	)	$	3,834

XML

Loss Sharing Agreements and FDIC Loss Share Receivable

9 Months Ended

Sep. 30, 2013

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 and assumed certain deposit 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 significant 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 CapitalSouth reimbursable loss period ends during the third quarter of 2014 for all covered assets excluding single family residential loans and during the third quarter of 2019 for single family residential loans. The Century and Orion reimbursable loss periods end during the fourth quarter of 2014 for all covered assets excluding single family residential loans and during the fourth quarter of 2019 for single family residential loans. The Sterling reimbursable loss period ends during the third quarter of 2015 for all covered assets excluding single family residential loans and during the third quarter of 2020 for single family residential loans.

In addition, all loans excluding single family residential loans 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, consistent with the covered loss reimbursement rates in effect during the reimbursable loss 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 incurred. Of the three loss share agreements that contain clawback provisions, cumulative losses under two of these agreements have exceeded the cumulative loss floors that would trigger a clawback payment. The loss floor has not yet been attained for the third agreement. However, the sum of the historical and remaining projected losses under the remaining agreement is in excess of the clawback amount stated in that agreement. The Company has recorded a liability of $797,000 at September 30, 2013 to reserve for the amount of consideration due to the FDIC based on cumulative losses to date. 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 receivable

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. Note 1 to these unaudited consolidated financial statements provides additional information regarding the Company’s FDIC loss share receivable accounting policy and basis of presentation.

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

	September 30
(Dollars in thousands)	2013			2012
Balance at beginning of period	$	423,069		$	591,844
Change due to (reversal of) credit loss provision recorded on FDIC covered loans		(58,565	)		33,786
Amortization		(68,707	)		(89,899	)
Submission of reimbursable losses to the FDIC		(44,910	)		(97,511	)
Impairment		(31,813	)		—
Changes due to a change in cash flow assumptions on OREO and other		(14,189	)		(7,053	)
Balance at end of period	$	204,885		$	431,167

FDIC loss share receivables collectability assessment

The Company assesses the FDIC loss share receivables for collectability on a quarterly basis. Note 1 provides a description of the Company’s policy for assessing the FDIC loss share receivables for collectability. Based on the collectability analysis completed for the three months ended September 30, 2013, the Company concluded that the $204.9 million FDIC loss share receivable is fully collectible as of September 30, 2013. See below for discussion of the impairment charge recognized for the three-month period ended March 31, 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 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, the Audit Committee and the Board of Directors concluded that an impairment charge was required under generally accepted accounting principles applicable to the Company and should be recognized in the Company’s unaudited 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 $31,813,000 through a charge to net income.

Generally accepted accounting principles require that the tax effects of unusual or infrequent items, such as impairment of the FDIC loss share receivables, be recognized in the interim period in which they occur. Recognition of the tax effect of the impairment during the three-month period ended March 31, 2013 resulted in an effective tax rate for that period, and subsequent year to date periods in 2013, that is not customary of the Company’s effective tax rate without recognition of this infrequent item.

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Loss Sharing Agreements and FDIC Loss Share Receivables - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended
	Mar. 31, 2013	Sep. 30, 2013 Business
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 loans		3 years
Liability for reserve for amount of consideration		$ 797,000
FDIC loss share receivables		204,900,000
Valuation allowance against indemnification assets	$ 31,813,000	$ 31,813,000

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2013

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

NOTE 15 – 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, 2013, the fair value of guarantees under commercial and standby letters of credit was $1,067,000. 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.

The Company had the following financial instruments outstanding, whose contract amounts represent credit risk:

(Dollars in thousands)	September 30 2013		December 31 2012
Commitments to grant loans	$	342,494	$	192,295
Unfunded commitments under lines of credit		2,972,046		2,372,971
Commercial and standby letters of credit		106,652		62,207
Reserve for unfunded lending commitments		11,959		—

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 it is reasonably possible to incur losses above amounts already accrued associated with legal proceedings between $0.5 million and $2.2 million.

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Other Comprehensive Income

9 Months Ended

Sep. 30, 2013

Equity [Abstract]

Other Comprehensive Income

NOTE 13 –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, 2013
(Dollars in thousands)	Before Tax		Tax Expense (Benefit)			Net-of-Tax 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 gains		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

	Three Months Ended September 30, 2012
(Dollars in thousands)	Before Tax			Tax Expense (Benefit)			Net-of-Tax Amount
Unrealized gain on securities:
Unrealized holding gains arising during the period	$	6,099		$	(2,135	)	$	3,964
Less: reclassification adjustment for gains included in net income		(41	)		14			(27	)
Net unrealized gains		6,058			(2,121	)		3,937
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	$	800		$	(280	)	$	520
Less: reclassification adjustment for losses included in net income		409			(142	)		267
Fair value of derivative instruments designated as cash flow hedges		1,209			(422	)		787
Total other comprehensive income	$	7,267		$	(2,543	)	$	4,724

	Nine Months Ended September 30, 2013
(Dollars in thousands)	Before Tax			Tax Expense (Benefit)			Net-of-Tax Amount
Unrealized loss 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	)
	Nine Months Ended September 30, 2012
(Dollars in thousands)	Before Tax			Tax Expense (Benefit)			Net-of-Tax Amount
Unrealized gain on securities:
Unrealized holding gains arising during the period	$	8,236		$	(2,883	)	$	5,353
Less: reclassification adjustment for gains included in net income		(3,743	)		1,310			(2,433	)
Net unrealized gains		4,493			(1,573	)		2,920
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	$	(1,882	)	$	659		$	(1,223	)
Less: reclassification adjustment for losses included in net income		1,195			(418	)		777
Fair value of derivative instruments designated as cash flow hedges		(687	)		241			(446	)
Total other comprehensive income	$	3,806		$	(1,332	)	$	2,474

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Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Oct. 31, 2013
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3
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		29,775,721

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Share-Based Compensation - Activity Related to Stock Options (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Share Based Compensation Arrangement By Share Based Payment Award Options Additional Disclosures [Abstract]
Number of shares, Outstanding options, Beginning balance	1,236,075	1,097,620
Number of shares, Outstanding options, Granted	75,722	226,764
Number of shares, Issued in connection with acquisition		32,863
Number of shares, Outstanding options, Exercised	(142,841)	(46,729)
Number of shares, Outstanding options, Forfeited or expired	(36,608)	(29,410)
Number of shares, Outstanding options, Ending balance	1,132,348	1,281,108
Number of shares, Exercisable options	749,545	822,410
Weighted average exercise price, Outstanding options, Beginning balance	$ 51.48	$ 50.14
Weighted average exercise price, Outstanding options, Granted	$ 52.36	$ 51.73
Weighted average exercise price, Issued in connection with acquisition		$ 41.30
Weighted average exercise price, Outstanding options, Exercised	$ 38.09	$ 29.42
Weighted average exercise price, Outstanding options, Forfeited or expired	$ 56.01	$ 57.39
Weighted average exercise price, Outstanding options, Ending balance	$ 53.09	$ 50.78
Weighted average exercise price, Exercisable options	$ 52.94	$ 48.94
Weighted average remaining contract life, Outstanding options, Ending period	4 years 8 months 12 days	4 years 9 months 18 days
Weighted average remaining contract life, Outstanding exercisable, Ending period	3 years 2 months 12 days
Weighted average remaining contract life, Exercisable options		3 years

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Share-Based Compensation

9 Months Ended

Sep. 30, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Share-Based Compensation

NOTE 14 – 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, 2013 and 2012, the Company did not have any equity awards that were settled in cash.

Stock option plans

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, 2013, future option or restricted stock awards of 491,346 shares could be made under approved incentive compensation plans.

The following table represents the compensation expense that is included in salaries and employee benefits expense and related income tax benefits in the accompanying consolidated statements of comprehensive income related to stock options.

	For the Three Months Ended September 30				For the Nine Months Ended September 30
(Dollars in thousands, except per share data)	2013		2012		2013		2012
Compensation expense related to stock options	$	526	$	334	$	1,592	$	1,317
Income tax benefit related to stock options		184		117		557		461
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 $495,000 and $940,000 of excess tax benefits as financing cash inflows during the nine months ended September 30, 2013 and 2012, respectively, related to the exercise and vesting of stock options. Net cash proceeds from the exercise of stock options were $5,441,000 and $1,541,000 for the nine months ended September 30, 2013 and 2012, 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:

	2013			2012
Expected dividends		2.6	%		2.3	%
Expected volatility		34.8	%		33.9	%
Risk-free interest rate		1.7	%		2.9	%
Expected term (in years)		8.6			5.8
Weighted-average grant-date fair value	$	15.37		$	13.58

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, 2013, there was $4,485,000 of unrecognized compensation cost related to stock options which is expected to be recognized over a weighted-average period of 4.7 years.

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

	Number of shares			Weighted Average Exercise Price		Weighted Average Remaining Contract Life
Oustanding options, December 31, 2011		1,097,620		$	50.14
Granted		226,764			51.73
Issued in connection with acquisition		32,863			41.30
Exercised		(46,729	)		29.42
Forfeited or expired		(29,410	)		57.39
Outstanding options, September 30, 2012		1,281,108		$	50.78		4.8	Years
Outstanding exercisable at September 30, 2012		822,410		$	48.94		3.0	Years
Oustanding 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
Outstanding exercisable at September 30, 2013		749,545		$	52.94		3.2	Years

At September 30, 2013, the aggregate intrinsic value of shares underlying outstanding stock options and underlying exercisable stock options was $2,090,000 and $1,951,000. Total intrinsic value of options exercised was $1,920,000 and $1,046,000 for the nine months ended September 30, 2013 and 2012, respectively.

Restricted stock plans

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, 2013, unearned share-based compensation associated with these awards totaled $23,253,000.

The following table represents the compensation expense that was included in salaries and employee benefits expense in the accompanying consolidated statements of income related to restricted stock grants:

	For the Three Months Ended September 30				For the Nine Months Ended September 30
(Dollars in thousands)	2013		2012		2013		2012
Compensation expense related to restricted stock	$	2,110	$	1,973	$	6,055	$	5,638

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

	2013			2012
Balance at beginning of period		538,202			512,112
Granted		166,223			174,393
Forfeited		(27,483	)		(8,736	)
Earned and issued		(136,629	)		(120,644	)
Balance at end of period		540,313			557,125

Phantom stock awards

As part of the 2008 Incentive Compensation 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 period and the current market price of the Company’s stock.

	For the Three Months Ended September 30				For the Nine Months Ended September 30
(Dollars in thousands)	2013		2012		2013		2012
Compensation expense related to phantom stock	$	792	$	245	$	2,602	$	1,426

The following table represents phantom stock award activity during the periods indicated.

	Number of share equivalents			Dividend equivalents			Total share equivalents			Value of share equivalents (1)
Balance, December 31, 2011		232,921			8,942			241,863		$	11,924,000
Granted		117,506			6,852			124,358			5,696,000
Forfeited share equivalents		(8,052	)		(242	)		(8,294	)		(380,000	)
Vested share equivalents		(16,735	)		(1,144	)		(17,879	)		(894,000	)
Balance, September 30, 2012		325,640			14,408			340,048		$	15,574,000
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

⁽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 $51.91 and $45.80 on September 30, 2013 and 2012, respectively.

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Loans Receivable - Schedule of Modified TDRs (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Receivables [Abstract]
Extended maturities		$ 412,000
Interest rate adjustment		481,000
Maturity and interest rate adjustment		2,389,000
Movement to or extension of interest-rate only payments		939,000
Forbearance	11,210,000	170,000
Total	$ 11,210,000	$ 4,391,000

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Loans Receivable - Schedule of Troubled Debt Restructurings (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Commercial Loans [Member] | Commercial Real Estate Construction [Member]
Loans Receivable [Line Items]
Accruing Loans, Current
Accruing Loans, Past Due Greater than 30 Days
Nonaccrual TDRs
Total TDRs
Commercial Loans [Member] | Real Estate [Member]
Loans Receivable [Line Items]
Accruing Loans, Current	411,000	370,000
Accruing Loans, Past Due Greater than 30 Days		264,000
Nonaccrual TDRs	5,601,000	18,985,000
Total TDRs	6,012,000	19,619,000
Commercial Loans [Member] | Business [Member]
Loans Receivable [Line Items]
Accruing Loans, Current	1,056,000	19,000
Accruing Loans, Past Due Greater than 30 Days
Nonaccrual TDRs	12,610,000	1,884,000
Total TDRs	13,666,000	1,903,000
Residential Mortgage Loans [Member] | Residential Prime [Member]
Loans Receivable [Line Items]
Accruing Loans, Current
Accruing Loans, Past Due Greater than 30 Days
Nonaccrual TDRs
Total TDRs
Residential Mortgage Loans [Member] | Residential Subprime [Member]
Loans Receivable [Line Items]
Accruing Loans, Current
Accruing Loans, Past Due Greater than 30 Days
Nonaccrual TDRs
Total TDRs
Consumer and Other Loans [Member]
Loans Receivable [Line Items]
Accruing Loans, Current	1,467,000	483,000
Accruing Loans, Past Due Greater than 30 Days		264,000
Nonaccrual TDRs	18,474,000	21,093,000
Total TDRs	19,941,000	21,840,000
Consumer and Other Loans [Member] | Home Equity [Member]
Loans Receivable [Line Items]
Accruing Loans, Current		94,000
Accruing Loans, Past Due Greater than 30 Days
Nonaccrual TDRs	263,000	224,000
Total TDRs	263,000	318,000
Consumer and Other Loans [Member] | Indirect Automobile [Member]
Loans Receivable [Line Items]
Accruing Loans, Current
Accruing Loans, Past Due Greater than 30 Days
Nonaccrual TDRs
Total TDRs
Consumer and Other Loans [Member] | Credit Card [Member]
Loans Receivable [Line Items]
Accruing Loans, Current
Accruing Loans, Past Due Greater than 30 Days
Nonaccrual TDRs
Total TDRs
Consumer and Other Loans [Member] | Consumer - Other [Member]
Loans Receivable [Line Items]
Accruing Loans, Current
Accruing Loans, Past Due Greater than 30 Days
Nonaccrual TDRs
Total TDRs

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Share-Based Compensation - Compensation Expense Included in Salaries and Employee Benefits Expense Related to Restricted Stock Grants (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Compensation expense related to restricted stock/phantom stock	$ 2,110	$ 1,973	$ 6,055	$ 5,638