10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

(Mark One)

x Quarterly Report Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934

For the quarterly period ended March 31, 2015

¨ Transition Report Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934

For the transition period from                      to                     

Commission file number 001-31940

F.N.B. CORPORATION

(Exact name of registrant as specified in its charter)

Florida	25-1255406
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
One North Shore Center, 12 Federal Street, Pittsburgh, PA	15212
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: 800-555-5455

(Former name, former address and former fiscal year, if changed since last report)

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 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. See definition of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

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

APPLICABLE ONLY TO CORPORATE ISSUERS:

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

Class	Outstanding at April 30, 2015
Common Stock, $0.01 Par Value	174,693,549 Shares

F.N.B. CORPORATION

FORM 10-Q

March 31, 2015

INDEX

		PAGE
PART I – FINANCIAL INFORMATION
Item 1.	Financial Statements
	Consolidated Balance Sheets		3
	Consolidated Statements of Comprehensive Income		4
	Consolidated Statements of Stockholders’ Equity		5
	Consolidated Statements of Cash Flows		6
	Notes to Consolidated Financial Statements		7
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations		43
Item 3.	Quantitative and Qualitative Disclosures About Market Risk		60
Item 4.	Controls and Procedures		60
PART II – OTHER INFORMATION
Item 1.	Legal Proceedings		61
Item 1A.	Risk Factors		61
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds		61
Item 3.	Defaults Upon Senior Securities		61
Item 4.	Mine Safety Disclosures		61
Item 5.	Other Information		61
Item 6.	Exhibits		61
Signatures			62

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PART I – FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

F.N.B. CORPORATION AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

Dollars in thousands, except par value

	March 31,			December 31,
	2015			2014
	(Unaudited)
Assets
Cash and due from banks	$	191,347		$	196,240
Interest bearing deposits with banks		42,899			91,153
Cash and Cash Equivalents		234,246			287,393
Securities available for sale		1,537,080			1,534,065
Securities held to maturity (fair value of $1,536,449 and $1,468,258)		1,513,204			1,453,355
Residential mortgage loans held for sale		4,621			6,180
Loans and leases, net of unearned income of $50,916 and $56,131		11,404,099			11,247,038
Allowance for credit losses		(128,499	)		(125,926	)
Net Loans and Leases		11,275,600			11,121,112
Premises and equipment, net		169,859			168,756
Goodwill		829,726			832,213
Core deposit and other intangible assets, net		45,520			47,504
Bank owned life insurance		303,102			301,771
Other assets		365,890			374,741
Total Assets	$	16,278,848		$	16,127,090
Liabilities
Deposits:
Non-interest bearing demand	$	2,728,599		$	2,647,623
Interest bearing demand		4,724,985			4,547,628
Savings		1,763,275			1,575,922
Certificates and other time deposits		2,589,184			2,611,035
Total Deposits		11,806,043			11,382,208
Short-term borrowings		1,740,500			2,041,658
Long-term borrowings		541,474			541,443
Other liabilities		135,555			140,325
Total Liabilities		14,223,572			14,105,634
Stockholders’ Equity
Preferred stock—$0.01 par value
Authorized – 20,000,000 shares
Issued – 110,877 shares		106,882			106,882
Common stock—$0.01 par value
Authorized – 500,000,000 shares
Issued – 176,305,233 and 175,450,303 shares		1,763			1,754
Additional paid-in capital		1,805,991			1,798,984
Retained earnings		193,461			176,120
Accumulated other comprehensive loss		(34,980	)		(46,003	)
Treasury stock – 1,613,531 and 1,458,045 shares at cost		(17,841	)		(16,281	)
Total Stockholders’ Equity		2,055,276			2,021,456
Total Liabilities and Stockholders’ Equity	$	16,278,848		$	16,127,090

See accompanying Notes to Consolidated Financial Statements

3

F.N.B. CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

In thousands, except per share data

Unaudited

	Three Months Ended
	March 31,
	2015			2014
Interest Income
Loans and leases, including fees	$	117,739		$	104,097
Securities:
Taxable		14,214			12,287
Nontaxable		1,373			1,291
Dividends		11			179
Other		32			26
Total Interest Income		133,369			117,880
Interest Expense
Deposits		7,449			7,149
Short-term borrowings		1,768			1,219
Long-term borrowings		2,231			1,687
Total Interest Expense		11,448			10,055
Net Interest Income		121,921			107,825
Provision for credit losses		8,136			7,006
Net Interest Income After Provision for Credit Losses		113,785			100,819
Non-Interest Income
Service charges		15,817			15,269
Trust fees		5,161			4,764
Insurance commissions and fees		4,369			4,945
Securities commissions and fees		3,057			2,391
Net securities (losses) gains		(9	)		9,461
Mortgage banking operations		1,799			214
Bank owned life insurance		1,843			2,185
Other		6,145			2,841
Total Non-Interest Income		38,182			42,070
Non-Interest Expense
Salaries and employee benefits		49,269			48,953
Net occupancy		8,976			8,482
Equipment		7,648			6,899
Amortization of intangibles		2,115			2,283
Outside services		8,777			7,237
FDIC insurance		3,689			2,994
Merger related		—			5,318
Other		14,181			12,000
Total Non-Interest Expense		94,655			94,166
Income Before Income Taxes		57,312			48,723
Income taxes		16,969			14,199
Net Income		40,343			34,524
Less: Preferred stock dividends		2,010			2,322
Net Income Available to Common Stockholders	$	38,333		$	32,202
Net Income per Common Share – Basic	$	0.22		$	0.20
Net Income per Common Share – Diluted		0.22			0.20
Cash Dividends per Common Share		0.12			0.12
Comprehensive Income	$	51,366		$	47,407

See accompanying Notes to Consolidated Financial Statements

4

F.N.B. CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

Dollars in thousands, except per share data

Unaudited

	Preferred Stock		Common Stock		Additional Paid-In Capital		Retained Earnings			Accumulated Other Comprehensive Income (Loss)			Treasury Stock			Total
Balance at January 1, 2015	$	106,882	$	1,754	$	1,798,984	$	176,120		$	(46,003	)	$	(16,281	)	$	2,021,456
Comprehensive income								40,343			11,023						51,366
Dividends declared:
Preferred stock								(2,010	)								(2,010	)
Common stock: $0.12/share								(20,992	)								(20,992	)
Issuance of common stock				9		5,986								(1,560	)		4,435
Restricted stock compensation						340											340
Tax benefit of stock-based compensation						681											681
Balance at March 31, 2015	$	106,882	$	1,763	$	1,805,991	$	193,461		$	(34,980	)	$	(17,841	)	$	2,055,276
Balance at January 1, 2014	$	106,882	$	1,592	$	1,608,117	$	121,870		$	(56,924	)	$	(7,154	)	$	1,774,383
Comprehensive income								34,524			12,883						47,407
Dividends declared:
Preferred stock								(2,322	)								(2,322	)
Common stock: $0.12/share								(20,016	)								(20,016	)
Issuance of common stock				12		5,939		(228	)					(3,376	)		2,347
Issuance of common stock—acquisitions				67		81,330											81,397
Restricted stock compensation						567											567
Tax benefit of stock-based compensation						1,224											1,224
Balance at March 31, 2014	$	106,882	$	1,671	$	1,697,177	$	133,828		$	(44,041	)	$	(10,530	)	$	1,884,987

See accompanying Notes to Consolidated Financial Statements

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F.N.B. CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

Dollars in thousands

Unaudited

	Three Months Ended
	March 31,
	2015			2014
Operating Activities
Net income	$	40,343		$	34,524
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization and accretion		11,725			8,339
Provision for credit losses		8,136			7,006
Deferred tax (benefit) expenses		3,217			(2,154	)
Net securities losses (gains)		9			(9,461	)
Tax benefit of stock-based compensation		(681	)		(1,224	)
Loans originated for sale		(71,499	)		(18,245	)
Loans sold		74,870			22,635
Gain on sale of loans		(1,813	)		(1,193	)
Net change in:
Interest receivable		(1,704	)		(123	)
Interest payable		(178	)		(750	)
Securities classified as trading in business combination and sold		—			203,178
Bank owned life insurance		(1,323	)		(1,513	)
Other, net		5,187			3,096
Net cash flows provided by operating activities		66,289			244,115
Investing Activities
Net change in loans and leases		(167,685	)		(140,938	)
Securities available for sale:
Purchases		(90,156	)		(318,332	)
Sales		33,228			85,877
Maturities		66,275			130,641
Securities held to maturity:
Purchases		(130,506	)		(266,486	)
Maturities		69,394			44,159
Purchase of bank owned life insurance		(8	)		(4,433	)
Withdrawal/surrender of bank owned life insurance		—			716
Increase in premises and equipment		(6,199	)		(6,042	)
Net cash received in business combinations		—			26,964
Net cash flows used in investing activities		(225,657	)		(447,874	)
Financing Activities
Net change in:
Demand (non-interest bearing and interest bearing) and savings accounts		445,685			253,935
Time deposits		(20,779	)		(44,043	)
Short-term borrowings		(301,158	)		(24,615	)
Increase in long-term borrowings		6,598			108,079
Decrease in long-term borrowings		(6,579	)		(39,966	)
Net proceeds from issuance of common stock		4,775			3,755
Tax benefit of stock-based compensation		681			1,224
Cash dividends paid:
Preferred stock		(2,010	)		(2,322	)
Common stock		(20,992	)		(20,016	)
Net cash flows provided by financing activities		106,221			236,031
Net (Decrease) Increase in Cash and Cash Equivalents		(53,147	)		32,272
Cash and cash equivalents at beginning of period		287,393			213,981
Cash and Cash Equivalents at End of Period	$	234,246		$	246,253

See accompanying Notes to Consolidated Financial Statements

6

F.N.B. CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Dollars in thousands, except share data

(Unaudited)

March 31, 2015

BUSINESS

F.N.B. Corporation (the Corporation), headquartered in Pittsburgh, Pennsylvania, is a diversified financial services company operating in six states and three major metropolitan areas, including Pittsburgh, Baltimore, Maryland and Cleveland, Ohio. As of March 31, 2015, the Corporation had 287 banking offices throughout Pennsylvania, Ohio, Maryland and West Virginia. The Corporation provides a full range of commercial banking, consumer banking and wealth management solutions through its subsidiary network which is led by its largest affiliate, First National Bank of Pennsylvania (FNBPA). Commercial banking solutions include corporate banking, small business banking, investment real estate financing, international banking, business credit, capital markets and lease financing. Consumer banking provides a full line of consumer banking products and services including deposit products, mortgage lending, consumer lending and a complete suite of mobile and online banking services. Wealth management services include asset management, private banking and insurance. The Corporation also operates Regency Finance Company (Regency), which had 73 consumer finance offices in Pennsylvania, Ohio, Kentucky and Tennessee as of March 31, 2015.

BASIS OF PRESENTATION

The Corporation’s accompanying consolidated financial statements and these notes to the financial statements include subsidiaries in which the Corporation has a controlling financial interest. The Corporation owns and operates FNBPA, First National Trust Company, First National Investment Services Company, LLC, F.N.B. Investment Advisors, Inc., First National Insurance Agency, LLC, Regency, Bank Capital Services, LLC and F.N.B. Capital Corporation, LLC, and includes results for each of these entities in the accompanying consolidated financial statements.

The accompanying consolidated financial statements include all adjustments that are necessary, in the opinion of management, to fairly reflect the Corporation’s financial position and results of operations in accordance with U.S. generally accepted accounting principles (GAAP). All significant intercompany balances and transactions have been eliminated. Certain prior period amounts have been reclassified to conform to the current period presentation. Events occurring subsequent to the date of the balance sheet have been evaluated for potential recognition or disclosure in the consolidated financial statements through the date of the filing of the consolidated financial statements with the Securities and Exchange Commission (SEC).

Certain information and note disclosures normally included in consolidated financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to the rules and regulations of the SEC. The interim operating results are not necessarily indicative of operating results the Corporation expects for the full year. These interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Corporation’s Annual Report on Form 10-K filed with the SEC on February 27, 2015.

USE OF ESTIMATES

The accounting and reporting policies of the Corporation conform with GAAP. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could materially differ from those estimates. Material estimates that are particularly susceptible to significant changes include the allowance for credit losses, securities valuations, goodwill and other intangible assets and income taxes.

MERGERS AND ACQUISITIONS

OBA Financial Services, Inc.

On September 19, 2014, the Corporation completed its acquisition of OBA Financial Services, Inc. (OBA), a bank holding company based in Germantown, Maryland. On the acquisition date, the estimated fair values of OBA included $390,128 in assets, $291,393 in loans and $295,922 in deposits. The acquisition was valued at approximately $85,554 and resulted in the Corporation issuing 7,170,037 shares of its common stock in exchange for 4,025,895 shares of OBA common stock. The Corporation also acquired the outstanding stock options of OBA that became fully vested upon the

7

acquisition. The assets and liabilities of OBA were recorded on the Corporation’s consolidated balance sheet at their preliminary estimated fair values as of September 19, 2014, the acquisition date, and OBA’s results of operations have been included in the Corporation’s consolidated statement of comprehensive income since that date. OBA’s banking affiliate, OBA Bank, was merged into FNBPA on September 19, 2014. Based on a preliminary purchase price allocation, the Corporation recorded $20,139 in goodwill and $4,304 in core deposit intangibles as a result of the acquisition. These fair value estimates are provisional amounts based on third party valuations that are currently under review. None of the goodwill is deductible for income tax purposes.

BCSB Bancorp, Inc.

On February 15, 2014, the Corporation completed its acquisition of BCSB Bancorp, Inc. (BCSB), a bank holding company based in Baltimore, Maryland. On the acquisition date, the estimated fair values of BCSB included $596,122 in assets, $304,932 in loans and $532,197 in deposits. The acquisition was valued at $80,547 and resulted in the Corporation issuing 6,730,597 shares of its common stock in exchange for 3,235,961 shares of BCSB common stock. The Corporation also acquired the outstanding stock options of BCSB that became fully vested upon the acquisition. The assets and liabilities of BCSB were recorded on the Corporation’s consolidated balance sheet at their fair values as of February 15, 2014, the acquisition date, and BCSB’s results of operations have been included in the Corporation’s consolidated statement of comprehensive income since that date. BCSB’s banking affiliate, Baltimore County Savings Bank, was merged into FNBPA on February 15, 2014. Based on the purchase price allocation, the Corporation recorded $42,451 in goodwill and $6,591 in core deposit intangibles as a result of the acquisition. None of the goodwill is deductible for income tax purposes.

NEW ACCOUNTING STANDARDS

Cloud Computing Arrangements

In April 2015, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2015-05, Intangibles-Goodwill and Other-Internal-Use Software. ASU 2015-05 provides guidance to help entities evaluate the accounting for fees paid by a customer in a cloud computing arrangement environment. The amendments in this Update provide a basis for evaluating whether a cloud computing arrangement includes a software license to internal-use software, and how to account for the software license element of the arrangement. This update supersedes the existing requirement to analogize to operating lease guidance in accounting for some software licenses. The requirements of ASU 2015-05 are effective for reporting periods beginning after December 15, 2015, with early adoption permitted. A reporting entity may apply ASU 2015-05 either prospectively or retrospectively. The Corporation is evaluating this new guidance and has not yet determined which approach it will adopt to apply the amendments in ASU 2015-05 or the impact that the adoption of this update will have on its financial statements.

Consolidation

In February 2015, the FASB issued ASU No. 2015-02, Consolidation. ASU 2015-02 changes the analysis that a reporting entity must perform to determine whether it should consolidate certain types of legal entities. This update modifies the evaluation of whether limited partnerships or similar legal entities are variable interest entities (VIEs) or voting interest entities, eliminates the presumption that a general partner should consolidate a limited partnership and affects the consolidation analysis of reporting entities that are involved with VIEs, particularly those that have fee arrangements and related party relationships. The requirements of ASU 2015-02 are effective for reporting periods beginning after December 15, 2015, with early adoption permitted. A reporting entity may apply ASU 2015-02 either retrospectively or by using a modified retrospective approach by recording a cumulative-effect adjustment to equity as of the beginning of the fiscal year of adoption. The adoption of this update is not expected to have a material effect on the financial statements, results of operations or liquidity of the Corporation.

Income Statement

In January 2015, the FASB issued ASU No. 2015-01, Income Statement – Extraordinary and Unusual Items. The FASB issued ASU 2015-01 as part of its Simplification Initiative to reduce complexity in accounting standards. ASU 2015-01 eliminates from GAAP the concept of extraordinary items. The requirements of ASU 2015-01 are effective for reporting periods beginning after December 15, 2015, with early adoption permitted. A reporting entity may apply ASU 2015-01 prospectively, or retrospectively to all prior periods presented in the financial statements. The adoption of this update will not have an effect on the financial statements, results of operations or liquidity of the Corporation, as the Corporation has not reported extraordinary items.

8

SECURITIES

The amortized cost and fair value of securities are as follows:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Securities Available for Sale
March 31, 2015
U.S. Treasury	$	29,637	$	300	$	—		$	29,937
U.S. government-sponsored entities		388,363		2,818		(521	)		390,660
Residential mortgage-backed securities:
Agency mortgage-backed securities		494,497		11,064		—			505,561
Agency collateralized mortgage obligations		573,738		3,646		(5,367	)		572,017
Non-agency collateralized mortgage obligations		1,359		5		—			1,364
Commercial mortgage-backed securities		6,844		—		(1	)		6,843
States of the U.S. and political subdivisions		12,713		476		(14	)		13,175
Other debt securities		16,643		373		(785	)		16,231
Total debt securities		1,523,794		18,682		(6,688	)		1,535,788
Equity securities		1,031		261		—			1,292
	$	1,524,825	$	18,943	$	(6,688	)	$	1,537,080
December 31, 2014
U.S. Treasury	$	29,604	$	78	$	—		$	29,682
U.S. government-sponsored entities		338,330		742		(1,939	)		337,133
Residential mortgage-backed securities:
Agency mortgage-backed securities		546,572		7,548		(35	)		554,085
Agency collateralized mortgage obligations		580,601		1,617		(9,047	)		573,171
Non-agency collateralized mortgage obligations		1,414		17		—			1,431
Commercial mortgage-backed securities		7,891		—		(11	)		7,880
States of the U.S. and political subdivisions		12,713		477		(32	)		13,158
Other debt securities		16,615		420		(857	)		16,178
Total debt securities		1,533,740		10,899		(11,921	)		1,532,718
Equity securities		1,031		316		—			1,347
	$	1,534,771	$	11,215	$	(11,921	)	$	1,534,065
Securities Held to Maturity
March 31, 2015
U.S. Treasury	$	500	$	182	$	—		$	682
U.S. government-sponsored entities		146,578		1,731		(149	)		148,160
Residential mortgage-backed securities:
Agency mortgage-backed securities		674,101		19,130		(20	)		693,211
Agency collateralized mortgage obligations		505,859		3,633		(4,884	)		504,608
Non-agency collateralized mortgage obligations		3,840		21		—			3,861
Commercial mortgage-backed securities		17,484		385		—			17,869
States of the U.S. and political subdivisions		164,842		3,372		(156	)		168,058
	$	1,513,204	$	28,454	$	(5,209	)	$	1,536,449
December 31, 2014
U.S. Treasury	$	502	$	168	$	—		$	670
U.S. government-sponsored entities		101,602		885		(524	)		101,963
Residential mortgage-backed securities:
Agency mortgage-backed securities		677,169		16,712		(346	)		693,535
Agency collateralized mortgage obligations		501,965		1,858		(7,329	)		496,494
Non-agency collateralized mortgage obligations		4,285		28		—			4,313
Commercial mortgage-backed securities		17,560		179		—			17,739
States of the U.S. and political subdivisions		150,272		3,315		(43	)		153,544
	$	1,453,355	$	23,145	$	(8,242	)	$	1,468,258

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The Corporation classifies securities as trading securities when management intends to sell such securities in the near term. Such securities are carried at fair value, with unrealized gains (losses) reflected through the consolidated statements of comprehensive income. The Corporation classified certain securities acquired in conjunction with its acquisitions as trading securities. The Corporation both acquired and sold these trading securities during the quarterly periods in which each of the acquisitions occurred. As of March 31, 2015 and December 31, 2014, the Corporation did not hold any trading securities.

Gross gains and gross losses were realized on securities as follows:

	Three Months Ended
	March 31,
	2015			2014
Gross gains	$	—		$	18,009
Gross losses		(9	)		(8,548	)
	$	(9	)	$	9,461

During the first quarter of 2014, the Corporation strategically sold its entire portfolio of pooled trust preferred securities (TPS) with net proceeds of $51,540 and a gain of $13,766. These were previously classified as collateralized debt obligations (CDOs) available for sale. Of the 23 pooled securities sold, one was determined to be a disallowed investment under the Volcker Rule (Section 619) of the Dodd-Frank Wall Street Reform and Consumer Protection Act (Dodd-Frank Act), and as such, was required to be disposed of by July 2015. Partially offsetting this gain was a net loss of $4,305 relating to the sale of other securities. By selling these securities, the Corporation strengthened the risk profile of its investment portfolio, improved its capital levels due to lowered risk-weighted assets and generated capital to support future growth.

As of March 31, 2015, the amortized cost and fair value of securities, by contractual maturities, were as follows:

	Available for Sale				Held to Maturity
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due in one year or less	$	4,985	$	5,069	$	1,282	$	1,285
Due from one to five years		423,890		426,811		138,269		139,139
Due from five to ten years		11,591		12,018		72,457		74,672
Due after ten years		6,890		6,105		99,912		101,804
		447,356		450,003		311,920		316,900
Residential mortgage-backed securities:
Agency mortgage-backed securities		494,497		505,561		674,101		693,211
Agency collateralized mortgage obligations		573,738		572,017		505,859		504,608
Non-agency collateralized mortgage obligations		1,359		1,364		3,840		3,861
Commercial mortgage-backed securities		6,844		6,843		17,484		17,869
Equity securities		1,031		1,292		—		—
	$	1,524,825	$	1,537,080	$	1,513,204	$	1,536,449

Maturities may differ from contractual terms because borrowers may have the right to call or prepay obligations with or without penalties. Periodic payments are received on mortgage-backed securities based on the payment patterns of the underlying collateral.

At March 31, 2015 and December 31, 2014, securities with a carrying value of $1,315,565 and $1,036,380, respectively, were pledged to secure public deposits, trust deposits and for other purposes as required by law. Securities with a carrying value of $807,261 and $892,647 at March 31, 2015 and December 31, 2014, respectively, were pledged as collateral for short-term borrowings.

10

Following are summaries of the fair values and unrealized losses of securities, segregated by length of impairment:

	Less than 12 Months							12 Months or More							Total
	#		Fair Value		Unrealized Losses			#		Fair Value		Unrealized Losses			#		Fair Value		Unrealized Losses
Securities Available for Sale
March 31, 2015
U.S. government-sponsored entities		3	$	59,857	$	(142	)		5	$	55,612	$	(379	)		8	$	115,469	$	(521	)
Residential mortgage-backed securities:
Agency collateralized mortgage obligations		4		61,998		(199	)		17		242,124		(5,168	)		21		304,122		(5,367	)
Commercial mortgage-backed securities		1		6,843		(1	)		—		—		—			1		6,843		(1	)
States of the U.S. and political subdivisions		—		—		—			1		1,177		(14	)		1		1,177		(14	)
Other debt securities		—		—		—			4		6,105		(785	)		4		6,105		(785	)
		8	$	128,698	$	(342	)		27	$	305,018	$	(6,346	)		35	$	433,716	$	(6,688	)
December 31, 2014
U.S. government-sponsored entities		7	$	89,986	$	(275	)		7	$	99,326	$	(1,664	)		14	$	189,312	$	(1,939	)
Residential mortgage-backed securities:
Agency mortgage-backed securities		2		45,145		(35	)		—		—		—			2		45,145		(35	)
Agency collateralized mortgage obligations		9		166,908		(1,238	)		16		225,700		(7,809	)		25		392,608		(9,047	)
Commercial mortgage-backed securities		1		7,880		(11	)		—		—		—			1		7,880		(11	)
States of the U.S. and political subdivisions		—		—		—			1		1,159		(32	)		1		1,159		(32	)
Other debt securities		—		—		—			4		6,030		(857	)		4		6,030		(857	)
		19	$	309,919	$	(1,559	)		28	$	332,215	$	(10,362	)		47	$	642,134	$	(11,921	)
Securities Held to Maturity
March 31, 2015
U.S. government-sponsored entities		1	$	14,970	$	(30	)		1	$	14,881	$	(119	)		2	$	29,851	$	(149	)
Residential mortgage-backed securities:
Agency mortgage-backed securities		—		—		—			1		1,234		(20	)		1		1,234		(20	)
Agency collateralized mortgage obligations		4		69,926		(402	)		14		185,466		(4,482	)		18		255,392		(4,884	)
States of the U.S. and political subdivisions		8		13,418		(156	)		—		—		—			8		13,418		(156	)
		13	$	98,314	$	(588	)		16	$	201,581	$	(4,621	)		29	$	299,895	$	(5,209	)
December 31, 2014
U.S. government-sponsored entities		2	$	24,989	$	(40	)		2	$	29,516	$	(484	)		4	$	54,505	$	(524	)
Residential mortgage-backed securities:
Agency mortgage-backed securities		1		1,099		(1	)		4		45,042		(345	)		5		46,141		(346	)
Agency collateralized mortgage obligations		8		104,071		(630	)		14		189,642		(6,699	)		22		293,713		(7,329	)
States of the U.S. and political subdivisions		1		1,427		(4	)		4		5,453		(39	)		5		6,880		(43	)
		12	$	131,586	$	(675	)		24	$	269,653	$	(7,567	)		36	$	401,239	$	(8,242	)

The Corporation does not intend to sell the debt securities and it is not more likely than not the Corporation will be required to sell the securities before recovery of their amortized cost basis.

The Corporation’s remaining portfolio of TPS consists of four single-issuer securities, which are primarily from money-center and large regional banks and are included in other debt securities. These TPS had an amortized cost and estimated fair value of $6,890 and $6,105 at March 31, 2015, respectively. The Corporation has concluded from its analysis performed at March 31, 2015 that it is probable that the Corporation will collect all contractual principal and interest payments related to these securities.

11

Other-Than-Temporary Impairment

The Corporation evaluates its investment securities portfolio for other-than-temporary impairment (OTTI) on a quarterly basis. Impairment is assessed at the individual security level. The Corporation considers an investment security impaired if the fair value of the security is less than its cost or amortized cost basis. The following table presents a summary of the cumulative credit-related OTTI charges recognized as components of earnings for securities for which a portion of an OTTI is recognized in other comprehensive income:

	Collateralized Debt Obligations			Equities		Total
For the Three Months Ended March 31, 2015
Beginning balance		—		$	27	$	27
Loss where impairment was not previously recognized		—			—		—
Additional loss where impairment was previously recognized		—			—		—
Reduction due to credit impaired securities sold		—			—		—
Ending balance		—		$	27	$	27
For the Three Months Ended March 31, 2014
Beginning balance	$	17,155		$	27	$	17,182
Loss where impairment was not previously recognized		—			—		—
Additional loss where impairment was previously recognized		—			—		—
Reduction due to credit impaired securities sold		(17,155	)		—		(17,155	)
Ending balance	$	—		$	27	$	27

The Corporation did not recognize any impairment losses on securities for the three months ended March 31, 2015 or 2014.

States of the U.S. and Political Subdivisions

The Corporation’s municipal bond portfolio of $178,017 as of March 31, 2015 is highly rated with an average entity-specific rating of AA and 99.0% of the portfolio rated A or better. General obligation bonds comprise 99.5% of the portfolio. Geographically, municipal bonds support the Corporation’s primary footprint as 89.9% of the securities are from municipalities located throughout Pennsylvania, Ohio and Maryland. The average holding size of the securities in the municipal bond portfolio is $1,203. In addition to the strong stand-alone ratings, 88.0% of the municipalities have some formal credit enhancement insurance that strengthens the creditworthiness of their issue. Management also reviews the credit profile of each issuer on a quarterly basis.

FEDERAL HOME LOAN BANK STOCK

The Corporation is a member of the Federal Home Loan Bank (FHLB) of Pittsburgh. The FHLB requires members to purchase and hold a specified minimum level of FHLB stock based upon their level of borrowings, collateral balances and participation in other programs offered by the FHLB. Stock in the FHLB is non-marketable and is redeemable at the discretion of the FHLB. Both cash and stock dividends on FHLB stock are reported as income.

Members do not purchase stock in the FHLB for the same reasons that traditional equity investors acquire stock in an investor-owned enterprise. Rather, members purchase stock to obtain access to the low-cost products and services offered by the FHLB. Unlike equity securities of traditional for-profit enterprises, the stock of FHLB does not provide its holders with an opportunity for capital appreciation because, by regulation, FHLB stock can only be purchased, redeemed and transferred at par value.

At March 31, 2015 and December 31, 2014, the Corporation’s FHLB stock totaled $42,000 and $54,751, respectively, and is included in other assets on the balance sheet. The Corporation accounts for the stock in accordance with ASC 325, which requires the investment to be carried at cost and evaluated for impairment based on the ultimate recoverability of the par value. Due to the continued improvement of the FHLB’s financial performance and stability over the past several years, along with a special dividend during the first quarter of 2015 and quarterly cash dividends in 2014 and the first quarter of 2015, the Corporation believes its holdings in the stock are ultimately recoverable at par value and, therefore, determined that FHLB stock was not other-than-temporarily impaired. In addition, the Corporation has ample liquidity and does not require redemption of its FHLB stock in the foreseeable future.

12

LOANS AND LEASES

Following is a summary of loans and leases, net of unearned income:

	Originated Loans		Acquired Loans		Total Loans and Leases
March 31, 2015
Commercial real estate	$	3,082,385	$	734,804	$	3,817,189
Commercial and industrial		2,281,075		116,656		2,397,731
Commercial leases		180,207		—		180,207
Total commercial loans and leases		5,543,667		851,460		6,395,127
Direct installment		1,594,846		58,775		1,653,621
Residential mortgages		877,437		421,660		1,299,097
Indirect installment		903,780		1,424		905,204
Consumer lines of credit		953,569		154,849		1,108,418
Other		42,632		—		42,632
	$	9,915,931	$	1,488,168	$	11,404,099
December 31, 2014
Commercial real estate	$	3,031,810	$	783,898	$	3,815,708
Commercial and industrial		2,197,793		120,222		2,318,015
Commercial leases		177,824		—		177,824
Total commercial loans and leases		5,407,427		904,120		6,311,547
Direct installment		1,579,770		64,851		1,644,621
Residential mortgages		817,586		445,467		1,263,053
Indirect installment		873,645		1,906		875,551
Consumer lines of credit		946,427		164,549		1,110,976
Other		41,290		—		41,290
	$	9,666,145	$	1,580,893	$	11,247,038

Commercial real estate includes both owner-occupied and non-owner-occupied loans secured by commercial properties. Commercial and industrial includes loans to businesses that are not secured by real estate. Commercial leases are made for new or used equipment. Direct installment is comprised of fixed-rate, closed-end consumer loans for personal, family or household use, such as home equity loans and automobile loans. Residential mortgages consist of conventional and jumbo mortgage loans for non-commercial properties. Indirect installment is comprised of loans originated by third parties and underwritten by the Corporation, primarily automobile loans. Consumer lines of credit include home equity lines of credit (HELOC) and consumer lines of credit that are either unsecured or secured by collateral other than home equity. Other is comprised primarily of credit cards, mezzanine loans and student loans.

The loan and lease portfolio consists principally of loans to individuals and small- and medium-sized businesses within the Corporation’s primary market area of Pennsylvania, eastern Ohio, Maryland and northern West Virginia. The total loan portfolio contains consumer finance loans to individuals in Pennsylvania, Ohio, Tennessee and Kentucky, which totaled $174,239 or 1.5% of total loans and leases at March 31, 2015, compared to $180,588 or 1.6% of total loans and leases at December 31, 2014. Due to the relative size of the consumer finance loan portfolio, they are not segregated from other consumer loans.

As of March 31, 2015, 40.8% of the commercial real estate loans were owner-occupied, while the remaining 59.2% were non-owner-occupied, compared to 41.6% and 58.4%, respectively, as of December 31, 2014. As of March 31, 2015 and December 31, 2014, the Corporation had commercial construction loans of $227,179 and $296,156, respectively, representing 2.0% and 2.6% of total loans and leases at those respective dates.

13

Acquired Loans

All acquired loans were initially recorded at fair value at the acquisition date. The outstanding balance and the carrying amount of acquired loans included in the consolidated balance sheet are as follows:

	March 31, 2015		December 31, 2014
Accounted for under ASC 310-30:
Outstanding balance	$	1,513,616	$	1,597,558
Carrying amount		1,259,995		1,344,171
Accounted for under ASC 310-20:
Outstanding balance		232,524		242,488
Carrying amount		220,921		228,748
Total acquired loans:
Outstanding balance		1,746,140		1,840,046
Carrying amount		1,480,916		1,572,919

The carrying amount of purchased credit impaired loans included in the table above totaled $7,100 at March 31, 2015 and $9,556 at December 31, 2014, representing less than 1% of the carrying amount of total acquired loans as of each date.

The following table provides changes in accretable yield for all acquired loans accounted for under ASC 310-30. Loans accounted for under ASC 310-20 are not included in this table.

	Three Months Ended
	March 31,
	2015			2014
Balance at beginning of period	$	331,899		$	305,646
Reduction due to unexpected early payoffs		(11,909	)		(12,694	)
Reclass from non-accretable difference		7,676			768
Disposals/transfers		(118	)		(944	)
Accretion		(16,264	)		(15,913	)
Balance at end of period	$	311,284		$	276,863

Credit Quality

Management monitors the credit quality of the Corporation’s loan and lease portfolio on an ongoing basis. Measurement of delinquency and past due status is based on the contractual terms of each loan.

Non-performing loans include non-accrual loans and non-performing troubled debt restructurings (TDRs). Past due loans are reviewed on a monthly basis to identify loans for non-accrual status. The Corporation places a loan on non-accrual status and discontinues interest accruals on originated loans generally when principal or interest is due and has remained unpaid for a certain number of days unless the loan is both well secured and in the process of collection. Commercial loans are placed on non-accrual at 90 days, installment loans are placed on non-accrual at 120 days and residential mortgages and consumer lines of credit are generally placed on non-accrual at 180 days. When a loan is placed on non-accrual status, all unpaid interest is reversed. Non-accrual loans may not be restored to accrual status until all delinquent principal and interest have been paid and the ultimate ability to collect the remaining principal and interest is reasonably assured. TDRs are loans in which the borrower has been granted a concession on the interest rate or the original repayment terms due to financial distress.

14

Following is a summary of non-performing assets:

	March 31, 2015			December 31, 2014
Non-accrual loans	$	45,029		$	45,113
Troubled debt restructurings		22,022			23,439
Total non-performing loans		67,051			68,552
Other real estate owned (OREO)		40,796			41,466
Total non-performing assets	$	107,847		$	110,018
Asset quality ratios:
Non-performing loans as a percent of total loans and leases		0.59	%		0.61	%
Non-performing loans + OREO as a percent of total loans and leases + OREO		0.94	%		0.97	%
Non-performing assets as a percent of total assets		0.66	%		0.68	%

The carrying value of residential OREO held as a result of obtaining physical possession upon completion of a foreclosure or through completion of a deed in lieu of foreclosure amounted to $3,541 at March 31, 2015. Also, the recorded investment of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process at March 31, 2015 amounted to $14,186.

The following tables provide an analysis of the aging of the Corporation’s past due loans by class, segregated by loans and leases originated and loans acquired:

	30-89 Days Past Due		> 90 Days Past Due and Still Accruing		Non-Accrual		Total Past Due		Current		Total Loans and Leases
Originated Loans and Leases
March 31, 2015
Commercial real estate	$	6,655	$	130	$	23,653	$	30,438	$	3,051,947	$	3,082,385
Commercial and industrial		2,939		3		8,846		11,788		2,269,287		2,281,075
Commercial leases		1,097		—		732		1,829		178,378		180,207
Total commercial loans and leases		10,691		133		33,231		44,055		5,499,612		5,543,667
Direct installment		8,748		3,575		6,464		18,787		1,576,059		1,594,846
Residential mortgages		7,040		1,731		3,625		12,396		865,041		877,437
Indirect installment		5,015		409		1,111		6,535		897,245		903,780
Consumer lines of credit		2,501		656		598		3,755		949,814		953,569
Other		47		39		—		86		42,546		42,632
	$	34,042	$	6,543	$	45,029	$	85,614	$	9,830,317	$	9,915,931
December 31, 2014
Commercial real estate	$	9,601	$	313	$	24,132	$	34,046	$	2,997,764	$	3,031,810
Commercial and industrial		2,446		3		8,310		10,759		2,187,034		2,197,793
Commercial leases		961		43		722		1,726		176,098		177,824
Total commercial loans and leases		13,008		359		33,164		46,531		5,360,896		5,407,427
Direct installment		9,333		3,617		7,117		20,067		1,559,703		1,579,770
Residential mortgages		8,709		3,891		2,964		15,564		802,022		817,586
Indirect installment		7,804		684		1,149		9,637		864,008		873,645
Consumer lines of credit		2,408		562		719		3,689		942,738		946,427
Other		13		135		—		148		41,142		41,290
	$	41,275	$	9,248	$	45,113	$	95,636	$	9,570,509	$	9,666,145

15

	30-89 Days Past Due		> 90 Days Past Due and Still Accruing		Total Past Due (1) (2)		Current		Discount			Total Loans
Acquired Loans
March 31, 2015
Commercial real estate	$	8,813	$	12,445	$	21,258	$	753,073	$	(39,527	)	$	734,804
Commercial and industrial		1,023		1,651		2,674		122,604		(8,622	)		116,656
Total commercial loans		9,836		14,096		23,932		875,677		(48,149	)		851,460
Direct installment		1,199		1,112		2,311		55,476		988			58,775
Residential mortgages		7,695		18,535		26,230		434,061		(38,631	)		421,660
Indirect installment		9		17		26		1,648		(250	)		1,424
Consumer lines of credit		1,115		2,146		3,261		156,676		(5,088	)		154,849
	$	19,854	$	35,906	$	55,760	$	1,523,538	$	(91,130	)	$	1,488,168
December 31, 2014
Commercial real estate	$	12,076	$	12,368	$	24,444	$	799,991	$	(40,537	)	$	783,898
Commercial and industrial		687		1,968		2,655		127,535		(9,968	)		120,222
Total commercial loans		12,763		14,336		27,099		927,526		(50,505	)		904,120
Direct installment		2,670		1,443		4,113		59,532		1,206			64,851
Residential mortgages		8,159		19,936		28,095		456,810		(39,438	)		445,467
Indirect installment		38		30		68		2,179		(341	)		1,906
Consumer lines of credit		1,048		2,279		3,327		166,912		(5,690	)		164,549
	$	24,678	$	38,024	$	62,702	$	1,612,959	$	(94,768	)	$	1,580,893

(1) Past due information for acquired loans is based on the contractual balance outstanding at March 31, 2015 and December 31, 2014.

(2) Acquired loans are considered performing upon acquisition, regardless of whether the customer is contractually delinquent, if the Corporation can reasonably estimate the timing and amount of expected cash flows on such loans. Accordingly, the Corporation does not consider acquired contractually delinquent loans to be non-accrual or non-performing and continues to recognize interest income on these loans using the accretion method.

The Corporation utilizes the following categories to monitor credit quality within its commercial loan and lease portfolio:

Rating Category	Definition
Pass	in general, the condition and performance of the borrower is satisfactory or better
Special Mention	in general, the condition of the borrower has deteriorated, requiring an increased level of monitoring
Substandard	in general, the condition and performance of the borrower has significantly deteriorated and could further deteriorate if deficiencies are not corrected
Doubtful	in general, the condition of the borrower has significantly deteriorated and the collection in full of both principal and interest is highly questionable or improbable

The use of these internally assigned credit quality categories within the commercial loan and lease portfolio permits management’s use of transition matrices to estimate a quantitative portion of credit risk. The Corporation’s internal credit risk grading system is based on past experiences with similarly graded loans and leases and conforms with regulatory categories. In general, loan and lease risk ratings within each category are reviewed on an ongoing basis according to the Corporation’s policy for each class of loans and leases. Each quarter, management analyzes the resulting ratings, as well as other external statistics and factors such as delinquency, to track the migration performance of the commercial loan and lease portfolio. Loans and leases within the Pass credit category or that migrate toward the Pass credit category generally have a lower risk of loss compared to loans and leases that migrate toward the Substandard or Doubtful credit categories. Accordingly, management applies higher risk factors to Substandard and Doubtful credit categories.

16

The following tables present a summary of the Corporation’s commercial loans and leases by credit quality category, segregated by loans and leases originated and loans acquired:

	Commercial Loan and Lease Credit Quality Categories
	Pass		Special Mention		Substandard		Doubtful		Total
Originated Loans and Leases
March 31, 2015
Commercial real estate	$	2,960,542	$	52,926	$	68,182	$	735	$	3,082,385
Commercial and industrial		2,190,066		53,482		36,081		1,446		2,281,075
Commercial leases		177,091		2,222		894		—		180,207
	$	5,327,699	$	108,630	$	105,157	$	2,181	$	5,543,667
December 31, 2014
Commercial real estate	$	2,890,830	$	58,630	$	81,951	$	399	$	3,031,810
Commercial and industrial		2,085,893		71,420		39,684		796		2,197,793
Commercial leases		174,677		2,198		949		—		177,824
	$	5,151,400	$	132,248	$	122,584	$	1,195	$	5,407,427
Acquired Loans
March 31, 2015
Commercial real estate	$	579,462	$	64,892	$	90,450		—	$	734,804
Commercial and industrial		102,974		2,411		11,271		—		116,656
	$	682,436	$	67,303	$	101,721		—	$	851,460
December 31, 2014
Commercial real estate	$	610,260	$	73,891	$	99,747		—	$	783,898
Commercial and industrial		103,862		3,506		12,854		—		120,222
	$	714,122	$	77,397	$	112,601		—	$	904,120

Credit quality information for acquired loans is based on the contractual balance outstanding at March 31, 2015 and December 31, 2014.

The Corporation uses delinquency transition matrices within the consumer and other loan classes to enable management to estimate a quantitative portion of credit risk. Each month, management analyzes payment and volume activity, FICO scores and other external factors such as unemployment, to determine how consumer loans are performing.

Following is a table showing originated consumer loans by payment status:

	Consumer Loan Credit Quality by Payment Status
	Performing		Non-Performing		Total
March 31, 2015
Direct installment	$	1,581,078	$	13,768	$	1,594,846
Residential mortgages		862,965		14,472		877,437
Indirect installment		902,515		1,265		903,780
Consumer lines of credit		951,980		1,589		953,569
Other		42,632		—		42,632
December 31, 2014
Direct installment	$	1,565,090	$	14,680	$	1,579,770
Residential mortgages		802,522		15,064		817,586
Indirect installment		872,340		1,305		873,645
Consumer lines of credit		944,631		1,796		946,427
Other		41,290		—		41,290

17

Loans and leases are designated as impaired when, in the opinion of management, based on current information and events, the collection of principal and interest in accordance with the loan and lease contract is doubtful. Typically, the Corporation does not consider loans and leases for impairment unless a sustained period of delinquency (i.e., 90-plus days) is noted or there are subsequent events that impact repayment probability (i.e., negative financial trends, bankruptcy filings, imminent foreclosure proceedings, etc.). Impairment is evaluated in the aggregate for consumer installment loans, residential mortgages, consumer lines of credit and commercial loan and lease relationships less than $500 based on loan and lease segment loss given default. For commercial loan relationships greater than or equal to $500, a specific valuation allowance is allocated, if necessary, so that the loan is reported net, at the present value of estimated future cash flows using a market interest rate or at the fair value of collateral if repayment is expected solely from the collateral. Consistent with the Corporation’s existing method of income recognition for loans and leases, interest on impaired loans, except those classified as non-accrual, is recognized as income using the accrual method. Impaired loans, or portions thereof, are charged off when deemed uncollectible.

Following is a summary of information pertaining to originated loans and leases considered to be impaired, by class of loan and lease:

	Unpaid Contractual Principal Balance		Recorded Investment With No Specific Reserve		Recorded Investment With Specific Reserve		Total Recorded Investment		Specific Reserve		Average Recorded Investment
At or for the Three Months Ended March 31, 2015
Commercial real estate	$	34,483	$	25,015	$	1,012	$	26,027	$	735	$	26,176
Commercial and industrial		11,251		8,138		1,928		10,066		1,446		9,811
Commercial leases		732		732		—		732		—		727
Total commercial loans and leases		46,466		33,885		2,940		36,825		2,181		36,714
Direct installment		13,977		13,768		—		13,768		—		14,343
Residential mortgages		15,718		14,472		—		14,472		—		15,547
Indirect installment		1,425		1,265		—		1,265		—		1,363
Consumer lines of credit		1,600		1,589		—		1,589		—		1,696
Other		—		—		—		—		—		—
	$	79,186	$	64,979	$	2,940	$	67,919	$	2,181	$	69,663
At or for the Year Ended December 31, 2014
Commercial real estate	$	34,583	$	25,443	$	883	$	26,326	$	399	$	30,807
Commercial and industrial		11,412		7,609		1,948		9,557		780		9,510
Commercial leases		722		722		—		722		—		686
Total commercial loans and leases		46,717		33,774		2,831		36,605		1,179		41,003
Direct installment		14,987		14,680		—		14,680		—		14,248
Residential mortgages		16,791		15,064		—		15,064		—		16,924
Indirect installment		1,467		1,305		—		1,305		—		1,399
Consumer lines of credit		1,803		1,796		—		1,796		—		1,793
Other		—		—		—		—		—		—
	$	81,765	$	66,619	$	2,831	$	69,450	$	1,179	$	75,367

Interest income is generally no longer recognized once a loan becomes impaired.

These tables do not reflect the additional allowance for credit losses relating to acquired loans in the following pools and categories: commercial real estate of $3,327; commercial and industrial of $712; direct installment of $1,477; residential mortgages of $1,193; indirect installment of $229; and consumer lines of credit of $314, totaling $7,252 at March 31, 2015 and commercial real estate of $3,286; commercial and industrial of $1,484; direct installment of $1,847; residential mortgages of $858; indirect installment of $232; and consumer lines of credit of $267, totaling $7,974 at December 31, 2014.

18

Troubled Debt Restructurings

TDRs are loans whose contractual terms have been modified in a manner that grants a concession to a borrower experiencing financial difficulties. TDRs typically result from loss mitigation activities and could include the extension of a maturity date, interest rate reduction, principal forgiveness, deferral or decrease in payments for a period of time and other actions intended to minimize the economic loss and to avoid foreclosure or repossession of collateral.

Following is a summary of the payment status of total TDRs:

	March 31, 2015		December 31, 2014
Accruing:
Performing	$	12,793	$	9,441
Non-performing		22,022		23,439
Non-accrual		8,040		8,272
	$	42,855	$	41,152

TDRs that are accruing and performing include loans that met the criteria for non-accrual of interest prior to restructuring for which the Corporation can reasonably estimate the timing and amount of the expected cash flows on such loans and for which the Corporation expects to fully collect the new carrying value of the loans. During the three months ended March 31, 2015, the Corporation returned to performing status $3,975 in restructured residential mortgage loans that have consistently met their modified obligations for more than six months. TDRs that are accruing and non-performing are comprised of consumer loans that have not demonstrated a consistent repayment pattern on the modified terms for more than six months, however it is expected that the Corporation will collect all future principal and interest payments. TDRs that are on non-accrual are not placed on accruing status until all delinquent principal and interest have been paid and the ultimate collectability of the remaining principal and interest is reasonably assured. Some loan modifications classified as TDRs may not ultimately result in the full collection of principal and interest, as modified, and may result in potential incremental losses which are factored into the allowance for credit losses.

Excluding purchased impaired loans, commercial loans over $500 whose terms have been modified in a TDR are generally placed on non-accrual, individually analyzed and measured for estimated impairment based on the fair value of the underlying collateral. The Corporation’s allowance for credit losses included specific reserves for commercial TDRs of $646 and $371 at March 31, 2015 and December 31, 2014, respectively, and pooled reserves for individual loans under $500 of $1,203 and $1,215 for those same respective periods, based on loan segment loss given default. Upon default, the amount of the recorded investment in the TDR in excess of the fair value of the collateral, less estimated selling costs, is generally considered a confirmed loss and is charged-off against the allowance for credit losses.

All other classes of loans, which are primarily secured by residential properties, whose terms have been modified in a TDR are pooled and measured for estimated impairment based on the expected net present value of the estimated future cash flows of the pool. The Corporation’s allowance for credit losses included pooled reserves for these classes of loans of $4,146 and $3,448 at March 31, 2015 and December 31, 2014, respectively. Upon default of an individual loan, the Corporation’s charge-off policy is followed accordingly for that class of loan.

19

The majority of TDRs are the result of interest rate concessions for a limited period of time. Following is a summary of loans, by class, that have been restructured:

	Three Months Ended March 31, 2015						Three Months Ended March 31, 2014
	Number of Contracts		Pre-Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment		Number of Contracts		Pre-Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment
Commercial real estate		2	$	312	$	196		1	$	188	$	188
Commercial and industrial		—		—		—		1		52		50
Total commercial loans		2		312		196		2		240		238
Direct installment		131		1,526		1,484		126		1,678		1,647
Residential mortgages		14		581		631		9		281		280
Indirect installment		5		16		16		7		17		16
Consumer lines of credit		16		270		270		7		255		255
Other		—		—		—		—		—		—
		168	$	2,705	$	2,597		151	$	2,471	$	2,436

Following is a summary of TDRs, by class of loans and leases, for which there was a payment default, excluding loans that were either charged-off or cured by period end. Default occurs when a loan is 90 days or more past due and is within 12 months of restructuring.

	Three Months Ended March 31, 2015 (1)				Three Months Ended March 31, 2014 (1)
	Number of Contracts		Recorded Investment		Number of Contracts		Recorded Investment
Direct installment		37	$	105		18	$	171
Residential mortgages		2		102		—		—
Indirect installment		3		4		1		—
Consumer lines of credit		1		92		—		—
Other		—		—		—		—
		43	$	303		19	$	171

(1) The recorded investment is as of period end.

ALLOWANCE FOR CREDIT LOSSES

The allowance for credit losses is established as losses are estimated to have occurred through a provision charged to earnings. Losses are charged against the allowance for credit losses when management believes the uncollectability of a loan balance is confirmed. Subsequent recoveries, if any, are credited to the allowance for credit losses. Allowances for impaired commercial loans over $500 are generally determined based on collateral values or the present value of estimated cash flows. All other impaired loans and leases are evaluated in the aggregate based on loan segment loss given default. Changes in the allowance for credit losses related to impaired loans and leases are charged or credited to the provision for credit losses.

The allowance for credit losses is maintained at a level that, in management’s judgment, is believed adequate to absorb probable losses associated with specifically identified loans and leases, as well as estimated probable credit losses inherent in the remainder of the portfolio. Adequacy of the allowance for credit losses is based on management’s evaluation of potential losses in the portfolio, which includes an assessment of past experience, current economic conditions in specific industries and geographic areas, general economic conditions, known and inherent risks in the portfolio, the estimated value of underlying collateral and residuals and changes in the composition of the portfolio. Determination of the allowance for credit losses is inherently subjective as it requires significant estimates, including the amounts and timing of expected future cash flows on impaired loans and leases, estimated losses on pools of homogeneous loans and leases based on transition matrices with predefined loss emergence periods and consideration of qualitative factors, all of which are susceptible to significant change.

20

Credit impaired loans obtained through acquisitions are accounted for under the provisions of ASC 310-30. The Corporation also accounts for certain acquired loans considered performing at the time of acquisition by analogy to ASC 310-30. ASC 310-30 requires the initial recognition of acquired loans at the present value of amounts expected to be received. Any deterioration in the credit quality of acquired loans subsequent to acquisition would be considered in the allowance for credit losses.

Following is a summary of changes in the allowance for credit losses, by loan and lease class:

	Balance at Beginning of Period		Charge- Offs			Recoveries		Net Charge- Offs			Provision for credit losses			Balance at End of Period
Three Months Ended March 31, 2015
Commercial real estate	$	37,588	$	(1,001	)	$	209	$	(792	)	$	1,996		$	38,792
Commercial and industrial		32,645		(684	)		120		(564	)		722			32,803
Commercial leases		2,398		(93	)		10		(83	)		261			2,576
Total commercial loans and leases		72,631		(1,778	)		339		(1,439	)		2,979			74,171
Direct installment		20,538		(2,433	)		269		(2,164	)		2,830			21,204
Residential mortgages		8,024		(511	)		15		(496	)		943			8,471
Indirect installment		7,504		(1,280	)		302		(978	)		1,131			7,657
Consumer lines of credit		8,496		(410	)		40		(370	)		764			8,890
Other		759		(335	)		11		(324	)		419			854
Total allowance on originated loans and leases		117,952		(6,747	)		976		(5,771	)		9,066			121,247
Purchased credit-impaired loans		660		(64	)		19		(45	)		6			621
Other acquired loans		7,314		(77	)		330		253			(936	)		6,631
Total allowance on acquired loans		7,974		(141	)		349		208			(930	)		7,252
Total allowance	$	125,926	$	(6,888	)	$	1,325	$	(5,563	)	$	8,136		$	128,499
Three Months Ended March 31, 2014
Commercial real estate	$	32,548	$	(2,223	)	$	299	$	(1,924	)	$	7,910		$	38,534
Commercial and industrial		32,603		(513	)		370		(143	)		(2,489	)		29,971
Commercial leases		1,903		(87	)		29		(58	)		99			1,944
Total commercial loans and leases		67,054		(2,823	)		698		(2,125	)		5,520			70,449
Direct installment		17,824		(2,521	)		267		(2,254	)		1,060			16,630
Residential mortgages		5,836		(132	)		4		(128	)		(401	)		5,307
Indirect installment		6,409		(802	)		217		(585	)		676			6,500
Consumer lines of credit		7,231		(323	)		55		(268	)		695			7,658
Other		530		(262	)		5		(257	)		306			579
Total allowance on originated loans and leases		104,884		(6,863	)		1,246		(5,617	)		7,856			107,123
Purchased credit-impaired loans		1,000		(249	)		—		(249	)		(43	)		708
Other acquired loans		4,900		9			286		295			(807	)		4,388
Total allowance on acquired loans		5,900		(240	)		286		46			(850	)		5,096
Total allowance	$	110,784	$	(7,103	)	$	1,532	$	(5,571	)	$	7,006		$	112,219

21

Following is a summary of the individual and collective originated allowance for credit losses and corresponding loan and lease balances by class:

	Allowance				Loans and Leases Outstanding
	Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Loans and Leases		Individually Evaluated for Impairment		Collectively Evaluated for Impairment
March 31, 2015
Commercial real estate	$	735	$	38,057	$	3,082,385	$	12,865	$	3,069,520
Commercial and industrial		1,446		31,357		2,281,075		5,711		2,275,364
Commercial leases		—		2,576		180,207		—		180,207
Total commercial loans and leases		2,181		71,990		5,543,667		18,576		5,525,091
Direct installment		—		21,204		1,594,846		—		1,594,846
Residential mortgages		—		8,471		877,437		—		877,437
Indirect installment		—		7,657		903,780		—		903,780
Consumer lines of credit		—		8,890		953,569		—		953,569
Other		—		854		42,632		—		42,632
	$	2,181	$	119,066	$	9,915,931	$	18,576	$	9,897,355
December 31, 2014
Commercial real estate	$	399	$	37,189	$	3,031,810	$	13,952	$	3,017,858
Commercial and industrial		780		31,865		2,197,793		5,837		2,191,956
Commercial leases		—		2,398		177,824		—		177,824
Total commercial loans and leases		1,179		71,452		5,407,427		19,789		5,387,638
Direct installment		—		20,538		1,579,770		—		1,579,770
Residential mortgages		—		8,024		817,586		—		817,586
Indirect installment		—		7,504		873,645		—		873,645
Consumer lines of credit		—		8,496		946,427		—		946,427
Other		—		759		41,290		—		41,290
	$	1,179	$	116,773	$	9,666,145	$	19,789	$	9,646,356

BORROWINGS

Following is a summary of short-term borrowings:

	March 31, 2015		December 31, 2014
Securities sold under repurchase agreements	$	757,279	$	882,696
Federal Home Loan Bank advances		500,000		820,000
Federal funds purchased		355,000		210,000
Subordinated notes		128,221		128,962
	$	1,740,500	$	2,041,658

Securities sold under repurchase agreements is comprised of customer repurchase agreements, which are sweep accounts with next day maturities utilized by larger commercial customers to earn interest on their funds. Securities are pledged to these customers in an amount equal to the outstanding balance.

22

Following is a summary of long-term borrowings:

	March 31, 2015		December 31, 2014
Federal Home Loan Bank advances	$	400,018	$	400,042
Subordinated notes		83,197		83,155
Junior subordinated debt		58,259		58,246
	$	541,474	$	541,443

The Corporation’s banking affiliate has available credit with the FHLB of $4,213,966 of which $900,018 was used as of March 31, 2015. These advances are secured by loans collateralized by residential mortgages, HELOCs, commercial real estate and FHLB stock and are scheduled to mature in various amounts periodically through the year 2021. Effective interest rates paid on the long-term advances ranged from 0.76% to 4.19% for both the three months ended March 31, 2015 and the year ended December 31, 2014.

The Corporation had two unconsolidated subsidiary trusts as of March 31, 2015 (collectively, the Trusts): F.N.B. Statutory Trust II and Omega Financial Capital Trust I. One hundred percent of the common equity of each Trust is owned by the Corporation. The Trusts were formed for the purpose of issuing Corporation-obligated mandatorily redeemable capital securities (TPS) to third-party investors. The proceeds from the sale of TPS and the issuance of common equity by the Trusts were invested in junior subordinated debt securities (subordinated debt) issued by the Corporation, which are the sole assets of each Trust. Since third-party investors are the primary beneficiaries, the Trusts are not consolidated in the Corporation’s financial statements. The Trusts pay dividends on the TPS at the same rate as the distributions paid by the Corporation on the junior subordinated debt held by the Trusts. Omega Financial Capital Trust I was assumed as a result of an acquisition.

Distributions on the subordinated debt issued to the Trusts are recorded as interest expense by the Corporation. The TPS are subject to mandatory redemption, in whole or in part, upon repayment of the subordinated debt. The TPS are eligible for redemption, at any time, at the Corporation’s discretion. Under recently issued capital guidelines, effective January 1, 2015, the portion of the subordinated debt, net of the Corporation’s investments in the Trusts, that qualifies as tier 1 capital is limited to 25% of the total $57,500 outstanding at March 31, 2015, with the remaining 75% moving to tier 2 capital. In 2016, the entire balance of the subordinated debt will be included in tier 2 capital. The Corporation has entered into agreements which, when taken collectively, fully and unconditionally guarantee the obligations under the TPS subject to the terms of each of the guarantees.

The following table provides information relating to the Trusts as of March 31, 2015:

	Trust Preferred Securities		Common Securities		Junior Subordinated Debt		Stated Maturity Date		Interest Rate
F.N.B. Statutory Trust II	$	21,500	$	665	$	22,165		6/15/36		1.92	%	Variable; LIBOR + 165 basis points (bps)
Omega Financial Capital Trust I		36,000		1,114		36,094		10/18/34		2.44	%	Variable; LIBOR + 219 bps
	$	57,500	$	1,779	$	58,259

DERIVATIVE AND HEDGING ACTIVITIES

The Corporation is exposed to certain risks arising from both its business operations and economic conditions. The Corporation principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Corporation manages economic risks, including interest rate risk, primarily by managing the amount, source, and duration of its assets and liabilities, and through the use of derivative instruments. Derivative instruments are used to reduce the effects that changes in interest rates may have on net income and cash flows. The Corporation also uses derivative instruments to facilitate transactions on behalf of its customers.

All derivatives are carried on the consolidated balance sheet at fair value and do not take into account the effects of master netting arrangements the Corporation has with other financial institutions. Credit risk is included in the determination of the estimated fair value of derivatives. Derivative assets are classified in the consolidated balance sheet under other assets and derivative liabilities are classified in the consolidated balance sheet under other liabilities. Changes in fair value are recognized in earnings except for certain changes related to derivative instruments designated as part of a cash flow hedging relationship.

23

The following table presents notional amounts and gross fair values of all derivative assets and derivative liabilities held by the Corporation:

	March 31, 2015						December 31, 2014
	Notional		Fair Value				Notional		Fair Value
	Amount		Asset		Liability		Amount		Asset		Liability
Gross Derivatives
Subject to master netting arrangements:
Interest rate contracts – designated	$	200,000	$	3,937	$	669	$	200,000	$	2,109	$	2,330
Interest rate swaps – not designated		1,020,957		6		53,718		972,002		140		43,655
Equity contracts – not designated		1,210		39		—		1,210		47		—
Total subject to master netting arrangements		1,222,167		3,982		54,387		1,173,212		2,296		45,985
Not subject to master netting arrangements:
Interest rate swaps – not designated		1,020,957		53,569		5		972,002		43,602		128
Credit risk contracts – not designated		76,416		—		—		68,632		—		—
Equity contracts – not designated		1,210		—		39		1,210		—		47
Total not subject to master netting arrangements		1,098,583		53,569		44		1,041,844		43,602		175
	$	2,320,750	$	57,551	$	54,431	$	2,215,056	$	45,898	$	46,160

Derivatives Designated as Hedging Instruments under GAAP

Interest Rate Contracts. The Corporation entered into interest rate derivative agreements to modify the interest rate characteristics of designated commercial loans from variable rate to fixed rate in order to reduce the impact of changes in future cash flows due to market interest rate changes. These agreements are designated as cash flow hedges (i.e., hedging the exposure to variability in expected future cash flows). The effective portion of the derivative’s gain or loss is initially reported as a component of other comprehensive income and subsequently reclassified into earnings in the same line item associated with the forecasted transaction when the forecasted transaction affects earnings. The ineffective portion of the gain or loss is reported in earnings immediately.

At March 31, 2015 and December 31, 2014, the notional amount of these interest rate derivative agreements totaled $200,000. Fair values included in other assets and other liabilities on the consolidated balance sheet applicable to these agreements amounted to $3,937 and $669, respectively, at March 31, 2015, and $2,109 and $2,330, respectively, at December 31, 2014. For the three months ended March 31, 2015, the amount reclassified from accumulated other comprehensive income (AOCI) to interest income on loans and leases totaled $810 ($526 net of tax).

As of March 31, 2015, the maximum length of time over which forecasted interest cash flows are hedged is nine years. In the twelve months that follow March 31, 2015, the Corporation expects to reclassify from the amount currently reported in AOCI net derivative gains of $2,929 ($1,904 net of tax), in association with interest received on the hedged loans. This amount could differ from amounts actually recognized due to changes in interest rates, hedge de-designations, and the addition of other hedges subsequent to March 31, 2015.

There were no components of derivative gains or losses excluded from the assessment of hedge effectiveness related to these cash flow hedges. For the three months ended March 31, 2015 and 2014, there was no hedge ineffectiveness. Also, during the three months ended March 31, 2015 and 2014, there were no gains or losses from cash flow hedge derivatives reclassified to earnings because it became probable that the original forecasted transactions would not occur.

24

Derivatives Not Designated as Hedging Instruments under GAAP

Interest Rate Swaps. The Corporation enters into interest rate swap agreements to meet the financing, interest rate and equity risk management needs of qualifying commercial loan customers. These agreements provide the customer the ability to convert from variable to fixed interest rates. The credit risk associated with derivatives executed with customers is essentially the same as that involved in extending loans and is subject to normal credit policies and monitoring. Swap derivative transactions with customers are not subject to enforceable master netting arrangements and are generally secured by rights to non-financial collateral, such as real and personal property.

The Corporation enters into positions with a derivative counterparty in order to offset its exposure on the fixed components of the customer interest rate swap agreements. The Corporation seeks to minimize counterparty credit risk by entering into transactions with only high-quality financial dealer institutions. These arrangements meet the definition of derivatives, but are not designated as hedging instruments under ASC 815, Derivatives and Hedging. Substantially all contracts with dealers that require central clearing (generally, transactions since June 10, 2014) are novated to a SEC registered clearing agency who becomes the Corporation’s counterparty.

The notional amount of these customer derivative agreements and the offsetting derivative counterparty positions each totaled $1,020,957 at March 31, 2015. Fair values included in other assets and other liabilities on the consolidated balance sheet applicable to these agreements amounted to $53,575 and $53,723, respectively, at March 31, 2015. At December 31, 2014, the notional amount of these customer derivative agreements and the offsetting derivative counterparty positions each totaled $972,002. At December 31, 2014, fair values included in other assets and other liabilities on the consolidated balance sheet amounted to $43,742 and $43,783, respectively.

The interest rate swap agreement with the loan customer and with the counterparty is reported at fair value in other assets and other liabilities on the consolidated balance sheet with any resulting gain or loss recorded in current period earnings as other income or other expense.

Credit Risk Contracts. The Corporation purchases and sells credit protection under risk participation agreements to share with other counterparties some of the credit exposure related to interest rate derivative contracts or to take on credit exposure to generate revenue. The Corporation will make/receive payments under these agreements if a customer defaults on its obligation to perform under certain derivative swap contracts.

Risk participation agreements sold with notional amounts totaling $50,061 have remaining terms ranging from two to nine years. Under these agreements, the Corporation’s maximum exposure assuming a customer defaults on its obligation to perform under certain derivative swap contracts with third parties would be $70 at March 31, 2015 and $21 at December 31, 2014.

The fair values of risk participation agreements purchased and sold were not material at March 31, 2015 and December 31, 2014.

Counterparty Credit Risk

The Corporation is party to master netting arrangements with most of its swap derivative counterparties. Collateral, usually marketable securities and/or cash, is exchanged between the Corporation and its counterparties, and is generally subject to thresholds and transfer minimums. For swap transactions that require central clearing, the Corporation posts cash to its clearing agency. Collateral positions are valued daily, and adjustments to amounts received and pledged by the Corporation are made as appropriate to maintain proper collateralization for these transactions.

Certain master netting agreements contain provisions that, if violated, could cause the counterparties to request immediate settlement or demand full collateralization under the derivative instrument. If the Corporation had breached its agreements with its derivative counterparties it would be required to settle its obligations under the agreements at the termination value and would be required to pay an additional $2,071 and $1,862 as of March 31, 2015 and December 31, 2014, respectively, in excess of amounts previously posted as collateral with the respective counterparty.

25

The following table presents information about derivative assets and derivative liabilities that are subject to enforceable master netting arrangements as well as those not subject to enforceable master netting arrangements:

	Gross Amount		Gross Amounts Offset in the Balance Sheet		Net Amount Presented in the Balance Sheet
March 31, 2015
Derivative Assets
Subject to master netting arrangements:
Interest rate contracts
Designated	$	3,937		—	$	3,937
Not designated		6		—		6
Equity contracts – not designated		39		—		39
Not subject to master netting arrangements:
Interest rate contracts – not designated		53,569		—		53,569
	$	57,551		—	$	57,551
Derivative Liabilities
Subject to master netting arrangements:
Interest rate contracts
Designated	$	669		—	$	669
Not designated		53,718		—		53,718
Not subject to master netting arrangements:
Interest rate contracts – not designated		5		—		5
Equity contracts – not designated		39		—		39
	$	54,431		—	$	54,431
December 31, 2014
Derivative Assets
Subject to master netting arrangements:
Interest rate contracts
Designated	$	2,109		—	$	2,109
Not designated		140		—		140
Equity contracts – not designated		47		—		47
Not subject to master netting arrangements:
Interest rate contracts – not designated		43,602		—		43,602
	$	45,898		—	$	45,898
Derivative Liabilities
Subject to master netting arrangements:
Interest rate contracts
Designated	$	2,330		—	$	2,330
Not designated		43,655		—		43,655
Not subject to master netting arrangements:
Interest rate contracts – not designated		128		—		128
Equity contracts – not designated		47		—		47
	$	46,160		—	$	46,160

26

The following table presents a reconciliation of the net amounts of derivative assets and derivative liabilities presented in the balance sheet to the net amounts that would result in the event of offset:

	Net Amount Presented in		Amount Not Offset in the Balance Sheet
	the Balance Sheet		Financial Instruments		Cash Collateral		Net Amount
March 31, 2015
Derivative Assets
Interest rate contracts:
Designated	$	3,937	$	1,902	$	2,035		—
Not designated		6		6		—		—
Equity contracts – not designated		39		39		—		—
	$	3,982	$	1,947	$	2,035		—
Derivative Liabilities
Interest rate contracts:
Designated	$	669	$	669	$	—	$	—
Not designated		53,718		30,626		21,346		1,746
	$	54,387	$	31,295	$	21,346	$	1,746
December 31, 2014
Derivative Assets
Interest rate contracts:
Designated	$	2,109	$	810	$	1,299		—
Not designated		140		138		2		—
Equity contracts – not designated		47		47		—		—
	$	2,296	$	995	$	1,301		—
Derivative Liabilities
Interest rate contracts:
Designated	$	2,330	$	2,330	$	—	$	—
Not designated		43,655		28,646		13,243		1,766
	$	45,985	$	30,976	$	13,243	$	1,766

The following table presents the effect of the Corporation’s derivative financial instruments on the income statement:

	Income		Three Months Ended
	Statement		March 31,
	Location		2015			2014
Interest Rate Products		Other income	$	(107	)	$	(14	)

Other

The Corporation has entered into interest rate lock commitments to originate residential mortgage loans held for sale and forward commitments to sell residential mortgage loans to secondary market investors. These arrangements are considered derivative instruments. The fair values of the Corporation’s rate lock commitments to customers and commitments with investors at March 31, 2015 and December 31, 2014 are not material.

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COMMITMENTS, CREDIT RISK AND CONTINGENCIES

The Corporation has commitments to extend credit and standby letters of credit that involve certain elements of credit risk in excess of the amount stated in the consolidated balance sheet. The Corporation’s exposure to credit loss in the event of non-performance by the customer is represented by the contractual amount of those instruments. The credit risk associated with loan commitments and standby letters of credit is essentially the same as that involved in extending loans and leases to customers and is subject to normal credit policies. Since many of these commitments expire without being drawn upon, the total commitment amounts do not necessarily represent future cash flow requirements.

Following is a summary of off-balance sheet credit risk information:

	March 31, 2015		December 31, 2014
Commitments to extend credit	$	3,969,614	$	3,665,481
Standby letters of credit		109,355		121,186

At March 31, 2015, funding of 68.2% of the commitments to extend credit was dependent on the financial condition of the customer. The Corporation has the ability to withdraw such commitments at its discretion. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Based on management’s credit evaluation of the customer, collateral may be deemed necessary. Collateral requirements vary and may include accounts receivable, inventory, property, plant and equipment and income-producing commercial properties.

Standby letters of credit are conditional commitments issued by the Corporation that may require payment at a future date. The credit risk involved in issuing letters of credit is quantified on a quarterly basis, through the review of historical performance of the Corporation’s portfolios and allocated as a liability on the Corporation’s balance sheet.

Other Legal Proceedings

The Corporation and its subsidiaries are involved in various pending legal proceedings in which claims for monetary damages and other relief are asserted. These actions include claims brought against the Corporation and its subsidiaries where the Corporation or a subsidiary acted as one or more of the following: a depository bank, lender, underwriter, fiduciary, financial advisor, broker, agent, acquiror or was engaged in other business activities. Although the ultimate outcome for any asserted claim cannot be predicted with certainty, the Corporation believes that it and its subsidiaries have valid defenses for all asserted claims. Reserves are established for legal claims when losses associated with the claims are judged to be probable and the amount of the loss can be reasonably estimated.

Based on information currently available, advice of counsel, available insurance coverage and established reserves, the Corporation does not anticipate, at the present time, that the aggregate liability, if any, arising out of such legal proceedings will have a material adverse effect on the Corporation’s consolidated financial position. However, the Corporation cannot determine whether or not any claims asserted against it will have a material adverse effect on its consolidated results of operations in any future reporting period.

STOCK INCENTIVE PLANS

Restricted Stock

The Corporation issues restricted stock awards, consisting of both restricted stock and restricted stock units, to key employees under its Incentive Compensation Plans (Plans). The Corporation issues time-based awards and performance-based awards under these Plans, both of which are based on a three-year vesting period. The grant date fair value of the time-based awards is equal to the price of the Corporation’s common stock on the grant date. The fair value of the performance-based awards is based on a Monte-Carlo Simulation valuation of the Corporation’s common stock as of the grant date.

The Corporation did not issue any restricted stock awards during the three months ended March 31, 2015 or 2014. For performance-based restricted stock awards granted since 2014, the amount of shares recipients will earn is variable based on the Corporation’s total stockholder return relative to a specified peer group of financial institutions over the three-year period. These market-based restricted stock units are included in the table below as if the recipients earned shares equal to 100% of the units issued. As of March 31, 2015, the Corporation had available up to 2,122,522 shares of common stock to issue under the Plans.

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The unvested restricted stock awards are eligible to receive cash dividends or dividend equivalents which are ultimately used to purchase additional shares of stock and are subject to forfeiture if the requisite service period is not completed or the specified performance criteria are not met. These awards are subject to certain accelerated vesting provisions upon retirement, death, disability or in the event of a change of control as defined in the award agreements.

Share-based compensation expense related to restricted stock awards was $340 and $532 for the three months ended March 31, 2015 and 2014, the tax benefit of which was $119 and $186, respectively.

The following table summarizes certain information concerning restricted stock awards:

	Three Months Ended March 31,
	2015					2014
	Awards			Weighted Average Grant Price		Awards			Weighted Average Grant Price
Unvested awards outstanding at beginning of period		1,354,093		$	11.86		1,729,033		$	10.23
Net adjustment due to performance		(46,956	)		10.25		(19,002	)		8.48
Vested		(458,450	)		10.60		(667,956	)		9.01
Forfeited		(2,357	)		17.93		(430	)		10.69
Dividend reinvestment		7,656			14.24		9,612			13.01
Unvested awards outstanding at end of period		853,986			12.63		1,051,257			11.06

The total fair value of awards vested was $5,740 and $8,631 for the three months ended March 31, 2015 and 2014, respectively.

As of March 31, 2015, there was $4,509 of unrecognized compensation cost related to unvested restricted stock awards, including $20 that is subject to accelerated vesting under the Plan’s immediate vesting upon retirement provision for awards granted prior to the adoption of ASC 718, Compensation – Stock Compensation. The components of the restricted stock awards as of March 31, 2015 are as follows:

	Service- Based Awards		Performance- Based Awards		Total
Unvested awards		397,593		456,393		853,986
Unrecognized compensation expense	$	2,659	$	1,850	$	4,509
Intrinsic value	$	5,224	$	5,997	$	11,221
Weighted average remaining life (in years)		1.91		1.73		1.81

Stock Options

All outstanding stock options were assumed from acquisitions and are fully vested. Upon consummation of the Corporation’s acquisitions, all outstanding stock options issued by the acquired companies were converted into equivalent Corporation stock options. The Corporation issues shares of treasury stock or authorized but unissued shares to satisfy stock options exercised. Shares issued upon the exercise of stock options were 60,094 and 59,217 for the three months ended March 31, 2015 and 2014, respectively.

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The following table summarizes certain information concerning stock option awards:

	Three Months Ended March 31,
	2015					2014
	Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price
Options outstanding at beginning of period		568,834		$	8.86		533,524		$	11.50
Assumed from acquisition		—			—		304,785			5.77
Exercised		(60,094	)		5.04		(87,332	)		6.05
Forfeited		(2,182	)		4.34		(48,172	)		25.79
Options outstanding and exercisable at end of period		506,558			9.33		702,805			8.71

The intrinsic value of outstanding and exercisable stock options at March 31, 2015 was $1,890.

Warrants

In conjunction with its participation in the U.S. Department of the Treasury’s (UST) Capital Purchase Program (CPP), the Corporation issued to the UST a warrant to purchase up to 1,302,083 shares of the Corporation’s common stock. Pursuant to Section 13(H) of the Warrant to Purchase Common Stock, the number of shares of common stock issuable upon exercise of the warrant was reduced in half to 651,042 shares on June 16, 2009, the date the Corporation completed a public offering. The warrant, which expires in 2019, has an exercise price of $11.52 per share.

In conjunction with the Parkvale Financial Corporation (Parkvale) acquisition on January 1, 2012, the warrant issued by Parkvale to the UST under the CPP has been converted into a warrant to purchase up to 819,640 shares of the Corporation’s common stock. This warrant, which was recorded at its fair value on January 1, 2012, expires in 2018 and has an exercise price of $5.81 per share.

In conjunction with the Annapolis Bancorp, Inc. (ANNB) acquisition on April 6, 2013, the warrant issued by ANNB to the UST under the CPP has been converted into a warrant to purchase up to 342,564 shares of the Corporation’s common stock at an exercise price of $3.57 per share. Subsequent adjustments related to actual dividends paid by the Corporation have increased the share amount of these warrants to 367,916, with a resulting lower exercise price of $3.32 per share as of March 31, 2015. The warrant, which was recorded at its fair value on April 6, 2013, expires in 2019.

RETIREMENT PLANS

The Corporation sponsors the Retirement Income Plan (RIP), a qualified noncontributory defined benefit pension plan that covered substantially all salaried employees hired prior to January 1, 2008. The RIP covers employees who satisfied minimum age and length of service requirements. The Corporation’s funding guideline has been to make annual contributions to the RIP each year, if necessary, such that minimum funding requirements have been met. The RIP was frozen as of December 31, 2010.

The Corporation also sponsors two supplemental non-qualified retirement plans. The ERISA Excess Retirement Plan provides retirement benefits equal to the difference, if any, between the maximum benefit allowable under the Internal Revenue Code and the amount that would be provided under the RIP, if no limits were applied. The Basic Retirement Plan (BRP) is applicable to certain officers whom the Board of Directors designates. Officers participating in the BRP receive a benefit based on a target benefit percentage based on years of service at retirement and a designated tier as determined by the Board of Directors. When a participant retires, the basic benefit under the BRP is a monthly benefit equal to the target benefit percentage times the participant’s highest average monthly cash compensation during five consecutive calendar years within the last ten calendar years of employment. This monthly benefit is reduced by the monthly benefit the participant receives from Social Security, the RIP, the ERISA Excess Retirement Plan and the annuity equivalent of the three percent automatic contributions to the qualified 401(k) defined contribution plan and the ERISA Excess Lost Match Plan. The BRP was frozen as of December 31, 2008. The ERISA Excess Retirement Plan was frozen as of December 31, 2010.

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The net periodic benefit credit for the defined benefit plans includes the following components:

	Three Months Ended
	March 31,
	2015			2014
Service cost	$	17		$	16
Interest cost		1,477			1,596
Expected return on plan assets		(2,491	)		(2,487	)
Amortization:
Unrecognized net transition asset		—			(5	)
Unrecognized prior service cost		2			2
Unrecognized loss		536			337
Net periodic pension credit	$	(459	)	$	(541	)

The Corporation’s subsidiaries participate in a qualified 401(k) defined contribution plan under which employees may contribute a percentage of their salary. Employees are eligible to participate upon their first day of employment. Under this plan, the Corporation matches 100% of the first six percent that the employee defers. Additionally, the Corporation may provide a performance-based company contribution of up to three percent if the Corporation exceeds annual financial goals. Prior to January 1, 2015, the Corporation matched 100% of the first four percent that the employee deferred, provided an automatic contribution of three percent of compensation at the end of the year and could make an additional performance-based company contribution of up to two percent if the Corporation achieved its performance goals for the plan year. The Corporation’s contribution expense was $2,167 and $2,570 for the three months ended March 31, 2015 and 2014, respectively.

The Corporation also sponsors an ERISA Excess Lost Match Plan for certain officers. This plan provides retirement benefits equal to the difference, if any, between the maximum benefit allowable under the Internal Revenue Code and the amount that would have been provided under the qualified 401(k) defined contribution plan, if no limits were applied.

INCOME TAXES

The Corporation bases its provision for income taxes upon income before income taxes, adjusted for the effect of certain tax-exempt income and non-deductible expenses. In addition, the Corporation reports certain items of income and expense in different periods for financial reporting and tax return purposes. The Corporation recognizes the tax effects of these temporary differences currently in the deferred income tax provision or benefit. The Corporation computes deferred tax assets or liabilities based upon the differences between the financial statement and income tax bases of assets and liabilities using the applicable marginal tax rate.

The Corporation evaluates the probability that it will ultimately realize the full value of its deferred tax assets. Realization of the Corporation’s deferred tax assets is dependent upon a number of factors including the existence of any cumulative losses in prior periods, the amount of taxes paid in available carry-back periods, expectations for future earnings, applicable tax planning strategies and assessment of current and future economic and business conditions. The Corporation establishes a valuation allowance when it is “more likely than not” that the Corporation will not be able to realize a benefit from its deferred tax assets, or when future deductibility is uncertain.

At March 31, 2015, the Corporation anticipates that it will not utilize some of its state net operating loss carryforwards and other net deferred tax assets at certain of its subsidiaries and has recorded a valuation allowance against these deferred tax assets. The Corporation believes that, except for the portion which is covered by a valuation allowance, it is more likely than not the Corporation will realize the benefits of its deferred tax assets, net of the valuation allowance, at March 31, 2015, based on the levels of projected taxable income of some of its entities.

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COMPREHENSIVE INCOME

The components of comprehensive income, net of related tax, are as follows:

	Three Months Ended
	March 31,
	2015			2014
Net income	$	40,343		$	34,524
Other comprehensive income:
Securities available for sale:
Unrealized gains arising during the period, net of tax expense of $4,523 and $9,016		8,400			16,742
Reclassification adjustment for losses (gains) included in net income, net of tax (benefit) expense of $(3) and $3,311		6			(6,150	)
Derivative instruments:
Unrealized gains arising during the period, net of tax expense of $1,504 and $1,402		2,793			2,603
Reclassification adjustment for gains included in net income, net of tax expense of $283 and $285		(526	)		(529	)
Pension and postretirement benefit obligations:
Unrealized gains arising during the period, net of tax expense of $189 and $117		350			217
Other comprehensive income		11,023			12,883
Comprehensive income	$	51,366		$	47,407

The amounts reclassified from AOCI related to securities available for sale are included in net securities (losses) gains on the Consolidated Statements of Comprehensive Income, while the amounts reclassified from AOCI related to derivative instruments are included in interest income on loans and leases on the Consolidated Statements of Comprehensive Income.

The tax (benefit) expense amounts reclassified from AOCI in connection with the securities available for sale and derivative instruments reclassifications are included in income tax provision on the Consolidated Statements of Comprehensive Income.

The following table presents changes in AOCI, net of tax, by component:

	Unrealized Net Gains (Losses) on Securities Available for Sale			Unrealized Net Gains (Losses) on Derivative Instruments			Unrecognized Pension and Postretirement Obligations			Total
Three Months Ended March 31, 2015
Balance at beginning of period	$	(440	)	$	(143	)	$	(45,420	)	$	(46,003	)
Other comprehensive income before reclassifications		8,400			2,793			350			11,543
Amounts reclassified from AOCI		6			(526	)		—			(520	)
Net current period other comprehensive income		8,406			2,267			350			11,023
Balance at end of period	$	7,966		$	2,124		$	(45,070	)	$	(34,980	)

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EARNINGS PER COMMON SHARE

Basic earnings per common share is calculated by dividing net income available to common stockholders by the weighted average number of shares of common stock outstanding net of unvested shares of restricted stock.

Diluted earnings per common share is calculated by dividing net income available to common stockholders by the weighted average number of shares of common stock outstanding, adjusted for the dilutive effect of potential common shares issuable for stock options, warrants and restricted shares, as calculated using the treasury stock method. Adjustments to the weighted average number of shares of common stock outstanding are made only when such adjustments dilute earnings per common share.

The following table sets forth the computation of basic and diluted earnings per common share:

	Three Months Ended
	March 31,
	2015		2014
Net income	$	40,343	$	34,524
Less: Preferred stock dividends		2,010		2,322
Net income available to common stockholders	$	38,333	$	32,202
Basic weighted average common shares outstanding		174,152,283		162,186,395
Net effect of dilutive stock options, warrants, restricted stock and convertible debt		1,673,693		1,780,851
Diluted weighted average common shares outstanding		175,825,976		163,967,246
Earnings per common share:
Basic	$	0.22	$	0.20
Diluted	$	0.22	$	0.20

For the three months ended March 31, 2015 and 2014, 24,272 and 51,641 shares of common stock, respectively, related to stock options and warrants were excluded from the computation of diluted earnings per common share because the exercise price of the shares was greater than the average market price of the common shares and, therefore, the effect would be anti-dilutive.

CASH FLOW INFORMATION

Following is a summary of supplemental cash flow information:

Three Months Ended March 31	2015		2014
Interest paid on deposits and other borrowings	$	11,626	$	10,576
Income taxes paid		—		—
Transfers of loans to other real estate owned		1,965		4,849
Financing of other real estate owned sold		166		—

BUSINESS SEGMENTS

The Corporation operates in four reportable segments: Community Banking, Wealth Management, Insurance and Consumer Finance.

• The Community Banking segment provides commercial and consumer banking services. Commercial banking solutions include corporate banking, small business banking, investment real estate financing, asset based lending, capital markets and lease financing. Consumer banking products and services include deposit products, mortgage lending, consumer lending and a complete suite of mobile and online banking services.

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• The Wealth Management segment provides a broad range of personal and corporate fiduciary services including the administration of decedent and trust estates. In addition, it offers various alternative products, including securities brokerage and investment advisory services, mutual funds and annuities.

• The Insurance segment includes a full-service insurance agency offering all lines of commercial and personal insurance through major carriers. The Insurance segment also includes a reinsurer.

• The Consumer Finance segment primarily makes installment loans to individuals and purchases installment sales finance contracts from retail merchants. The Consumer Finance segment activity is funded through the sale of the Corporation’s subordinated notes at the finance company’s branch offices.

The following tables provide financial information for these segments of the Corporation. The information provided under the caption “Parent and Other” represents operations not considered to be reportable segments and/or general operating expenses of the Corporation, and includes the parent company, other non-bank subsidiaries and eliminations and adjustments which are necessary for purposes of reconciliation to the consolidated amounts.

	Community Banking		Wealth Management		Insurance			Consumer Finance		Parent and Other			Consolidated
At or for the Three Months Ended March 31, 2015
Interest income	$	122,118	$	—	$	23		$	9,593	$	1,635		$	133,369
Interest expense		9,941		—		—			860		647			11,448
Net interest income		112,177		—		23			8,733		988			121,921
Provision for credit losses		6,327		—		—			1,574		235			8,136
Non-interest income		27,301		8,387		3,593			676		(1,775	)		38,182
Non-interest expense		77,079		6,493		4,170			4,808		(10	)		92,540
Intangible amortization		1,947		68		100			—		—			2,115
Income tax expense (benefit)		15,931		658		(226	)		1,149		(543	)		16,969
Net income (loss)		38,194		1,168		(428	)		1,878		(469	)		40,343
Total assets		16,100,851		21,125		18,464			182,662		(44,254	)		16,278,848
Total intangibles		852,764		10,652		10,021			1,809		—			875,246
At or for the Three Months Ended March 31, 2014
Interest income	$	106,691	$	—	$	25		$	9,365	$	1,799		$	117,880
Interest expense		8,248		—		—			846		961			10,055
Net interest income		98,443		—		25			8,519		838			107,825
Provision for credit losses		5,296		—		—			1,457		253			7,006
Non-interest income		31,913		7,323		4,210			660		(2,036	)		42,070
Non-interest expense		76,866		6,292		3,046			4,937		742			91,883
Intangible amortization		2,110		72		101			—		—			2,283
Income tax expense (benefit)		13,343		351		385			1,073		(953	)		14,199
Net income (loss)		32,741		608		703			1,712		(1,240	)		34,524
Total assets		14,299,543		19,542		19,954			182,018		(44,547	)		14,476,510
Total intangibles		833,642		10,936		10,425			1,809		—			856,812

FAIR VALUE MEASUREMENTS

The Corporation uses fair value measurements to record fair value adjustments to certain financial assets and liabilities and to determine fair value disclosures. Securities available for sale and derivatives are recorded at fair value on a recurring basis. Additionally, from time to time, the Corporation may be required to record at fair value other assets on a non-recurring basis, such as mortgage loans held for sale, certain impaired loans, OREO and certain other assets.

Fair value is defined as an exit price, representing the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value measurements are not adjusted for transaction costs. Fair value is a market-based measure considered from the perspective of a market participant who holds the asset or owes the liability rather than an entity-specific measure.

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In determining fair value, the Corporation uses various valuation approaches, including market, income and cost approaches. ASC 820, Fair Value Measurements and Disclosures, establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that observable inputs be used when available. Observable inputs are inputs that market participants would use in pricing the asset or liability, which are developed based on market data obtained from sources independent of the Corporation. Unobservable inputs reflect the Corporation’s assumptions about the assumptions that market participants would use in pricing an asset or liability, which are developed based on the best information available in the circumstances.

The fair value hierarchy gives the highest priority to unadjusted quoted market prices in active markets for identical assets or liabilities (Level 1 measurement) and the lowest priority to unobservable inputs (Level 3 measurement). The fair value hierarchy is broken down into three levels based on the reliability of inputs as follows:

Measurement Category	Definition
Level 1	valuation is based upon unadjusted quoted market prices for identical instruments traded in active markets.
Level 2	valuation is based upon quoted market prices for similar instruments traded in active markets, quoted market prices for identical or similar instruments traded in markets that are not active and model-based valuation techniques for which all significant assumptions are observable in the market or can be corroborated by market data.
Level 3	valuation is derived from other valuation methodologies including discounted cash flow models and similar techniques that use significant assumptions not observable in the market. These unobservable assumptions reflect estimates of assumptions that market participants would use in determining fair value.

A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement.

Following is a description of the valuation methodologies the Corporation uses for financial instruments recorded at fair value on either a recurring or non-recurring basis:

Securities Available For Sale

Securities available for sale consists of both debt and equity securities. These securities are recorded at fair value on a recurring basis. At March 31, 2015, 99.9% of these securities used valuation methodologies involving market-based or market-derived information, collectively Level 1 and Level 2 measurements, to measure fair value. The remaining 0.1% of these securities was measured using model-based techniques, with primarily unobservable (Level 3) inputs.

The Corporation closely monitors market conditions involving assets that have become less actively traded. If the fair value measurement is based upon recent observable market activity of such assets or comparable assets (other than forced or distressed transactions) that occur in sufficient volume, and do not require significant adjustment using unobservable inputs, those assets are classified as Level 1 or Level 2; if not, they are classified as Level 3. Making this assessment requires significant judgment.

The Corporation uses prices from independent pricing services and, to a lesser extent, indicative (non-binding) quotes from independent brokers, to measure the fair value of investment securities. The Corporation validates prices received from pricing services or brokers using a variety of methods, including, but not limited to, comparison to secondary pricing services, corroboration of pricing by reference to other independent market data such as secondary broker quotes and relevant benchmark indices, and review of pricing information by Corporate personnel familiar with market liquidity and other market-related conditions.

Derivative Financial Instruments

The Corporation determines its fair value for derivatives using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects contractual terms of the derivative, including the period to maturity and uses observable market based inputs, including interest rate curves and implied volatilities.

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The Corporation incorporates credit valuation adjustments to appropriately reflect both its own non-performance risk and the respective counterparty’s non-performance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of non-performance risk, the Corporation considers the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts and guarantees.

Although the Corporation has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by itself and its counterparties. However, as of March 31, 2015, the Corporation has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivatives. As a result, the Corporation has determined that its derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy.

Residential Mortgage Loans Held For Sale

These loans are carried at the lower of cost or fair value. Under lower of cost or fair value accounting, periodically, it may be necessary to record non-recurring fair value adjustments. Fair value, when recorded, is based on independent quoted market prices and is classified as Level 2.

Impaired Loans

The Corporation reserves for commercial loan relationships greater than or equal to $500 that the Corporation considers impaired as defined in ASC 310 at the time the Corporation identifies the loan as impaired based upon the present value of expected future cash flows available to pay the loan, or based upon the fair value of the collateral less estimated selling costs where a loan is collateral dependent. Collateral may be real estate and/or business assets including equipment, inventory and accounts receivable.

The Corporation determines the fair value of real estate based on appraisals by licensed or certified appraisers. The value of business assets is generally based on amounts reported on the business’ financial statements. Management must rely on the financial statements prepared and certified by the borrower or its accountants in determining the value of these business assets on an ongoing basis, which may be subject to significant change over time. Based on the quality of information or statements provided, management may require the use of business asset appraisals and site-inspections to better value these assets. The Corporation may discount appraised and reported values based on management’s historical knowledge, changes in market conditions from the time of valuation or management’s knowledge of the borrower and the borrower’s business. Since not all valuation inputs are observable, the Corporation classifies these non-recurring fair value determinations as Level 2 or Level 3 based on the lowest level of input that is significant to the fair value measurement.

The Corporation reviews and evaluates impaired loans no less frequently than quarterly for additional impairment based on the same factors identified above.

Other Real Estate Owned

OREO is comprised of commercial and residential real estate properties obtained in partial or total satisfaction of loan obligations plus some bank owned real estate. OREO acquired in settlement of indebtedness is recorded at the lower of carrying amount of the loan or fair value less costs to sell. Subsequently, these assets are carried at the lower of carrying value or fair value less costs to sell. Accordingly, it may be necessary to record non-recurring fair value adjustments. Fair value is generally based upon appraisals by licensed or certified appraisers and other market information and is classified as Level 2 or Level 3.

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The following table presents the balances of assets and liabilities measured at fair value on a recurring basis:

	Level 1		Level 2		Level 3		Total
March 31, 2015
Assets Measured at Fair Value
Available for sale debt securities:
U.S. Treasury	$	—	$	29,937	$	—	$	29,937
U.S. government-sponsored entities		—		390,660		—		390,660
Residential mortgage-backed securities:
Agency mortgage-backed securities		—		505,561		—		505,561
Agency collateralized mortgage obligations		—		572,017		—		572,017
Non-agency collateralized mortgage obligations		—		10		1,354		1,364
Commercial mortgage-backed securities		—		6,843		—		6,843
States of the U.S. and political subdivisions		—		13,175		—		13,175
Other debt securities		—		16,231		—		16,231
		—		1,534,434		1,354		1,535,788
Available for sale equity securities:
Financial services industry		91		645		435		1,171
Insurance services industry		121		—		—		121
		212		645		435		1,292
		212		1,535,079		1,789		1,537,080
Derivative financial instruments:
Trading		—		53,614		—		53,614
Not for trading		—		3,937		—		3,937
		—		57,551		—		57,551
	$	212	$	1,592,630	$	1,789	$	1,594,631
Liabilities Measured at Fair Value
Derivative financial instruments:
Trading		—	$	53,762		—	$	53,762
Not for trading		—		669		—		669
		—	$	54,431		—	$	54,431

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	Level 1		Level 2		Level 3		Total
December 31, 2014
Assets Measured at Fair Value
Available for sale debt securities:
U.S. Treasury	$	—	$	29,682	$	—	$	29,682
U.S. government-sponsored entities		—		337,133		—		337,133
Residential mortgage-backed securities:
Agency mortgage-backed securities		—		554,085		—		554,085
Agency collateralized mortgage obligations		—		573,171		—		573,171
Non-agency collateralized mortgage obligations		—		11		1,420		1,431
Commercial mortgage-backed securities		—		7,880		—		7,880
States of the U.S. and political subdivisions		—		13,158		—		13,158
Other debt securities		—		16,178		—		16,178
		—		1,531,298		1,420		1,532,718
Available for sale equity securities:
Financial services industry		99		654		475		1,228
Insurance services industry		119		—		—		119
		218		654		475		1,347
		218		1,531,952		1,895		1,534,065
Derivative financial instruments:
Trading		—		43,789		—		43,789
Not for trading		—		2,109		—		2,109
		—		45,898		—		45,898
	$	218	$	1,577,850	$	1,895	$	1,579,963
Liabilities Measured at Fair Value
Derivative financial instruments:
Trading		—	$	43,830		—	$	43,830
Not for trading		—		2,330		—		2,330
		—	$	46,160		—	$	46,160

There were no transfers of assets or liabilities between the hierarchy levels for 2015 or 2014.

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The following table presents additional information about assets measured at fair value on a recurring basis and for which the Corporation has utilized Level 3 inputs to determine fair value:

	Pooled Trust Preferred Collateralized Debt Obligations			Equity Securities			Residential Non-Agency Collateralized Mortgage Obligations			Total
Three Months Ended March 31, 2015
Balance at beginning of period		—		$	475		$	1,420		$	1,895
Total gains (losses) – realized/unrealized:
Included in earnings		—			—			—			—
Included in other comprehensive income		—			(40	)		(12	)		(52	)
Accretion included in earnings		—			—			1			1
Purchases, issuances, sales and settlements:
Purchases		—			—			—			—
Issuances		—			—			—			—
Sales/redemptions		—			—			—			—
Settlements		—			—			(55	)		(55	)
Transfers from Level 3		—			—			—			—
Transfers into Level 3		—			—			—			—
Balance at end of period		—		$	435		$	1,354		$	1,789
Year Ended December 31, 2014
Balance at beginning of period	$	31,595		$	410		$	1,744		$	33,749
Total gains (losses) – realized/unrealized:
Included in earnings		13,766			—			—			13,766
Included in other comprehensive income		5,608			65			3			5,676
Accretion included in earnings		657			—			5			662
Purchases, issuances, sales and settlements:
Purchases		—			—			—			—
Issuances		—			—			—			—
Sales/redemptions		(51,527	)		—			—			(51,527	)
Settlements		(99	)		—			(332	)		(431	)
Transfers from Level 3		—			—			—			—
Transfers into Level 3		—			—			—			—
Balance at end of period	$	—		$	475		$	1,420		$	1,895

The Corporation reviews fair value hierarchy classifications on a quarterly basis. Changes in the observability of the valuation attributes may result in reclassification of certain financial assets or liabilities. Such reclassifications are reported as transfers in/out of Level 3 at fair value at the beginning of the period in which the changes occur. See the Securities footnote in the Notes to Consolidated Financial Statements section of this Report for information relating to significant unobservable inputs used in determining Level 3 fair values.

For the three months ended March 31, 2015 and 2014, there were no gains or losses included in earnings attributable to the change in unrealized gains or losses relating to assets still held as of those dates. The total (losses) gains included in earnings are in the net securities (losses) gains line item in the Consolidated Statements of Comprehensive Income.

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In accordance with GAAP, from time to time, the Corporation measures certain assets at fair value on a non-recurring basis. These adjustments to fair value usually result from the application of the lower of cost or fair value accounting or write-downs of individual assets. Valuation methodologies used to measure these fair value adjustments were previously described. For assets measured at fair value on a non-recurring basis still held at the balance sheet date, the following table provides the hierarchy level and the fair value of the related assets or portfolios:

	Level 1		Level 2		Level 3		Total
March 31, 2015
Impaired loans		—	$	190	$	693	$	883
Other real estate owned		—		977		1,433		2,410
December 31, 2014
Impaired loans		—		177		1,528		1,705
Other real estate owned		—		5,695		2,365		8,060

Impaired loans measured or re-measured at fair value on a non-recurring basis during the three months ended March 31, 2015 had a carrying amount of $2,940 and an allocated allowance for credit losses of $2,181. The allocated allowance is based on fair value of $883 less estimated costs to sell of $124. The allowance for credit losses includes a provision applicable to the current period fair value measurements of $1,002, which was included in the provision for credit losses for the three months ended March 31, 2015.

OREO with a carrying amount of $2,501 was written down to $2,140 (fair value of $2,410 less estimated costs to sell of $270), resulting in a loss of $361, which was included in earnings for the three months ended March 31, 2015.

Fair Value of Financial Instruments

The following methods and assumptions were used to estimate the fair value of each financial instrument:

Cash and Cash Equivalents, Accrued Interest Receivable and Accrued Interest Payable. For these short-term instruments, the carrying amount is a reasonable estimate of fair value.

Securities. For both securities available for sale and securities held to maturity, fair value equals the quoted market price from an active market, if available, and is classified within Level 1. If a quoted market price is not available, fair value is estimated using quoted market prices for similar securities or pricing models, and is classified as Level 2. Where there is limited market activity or significant valuation inputs are unobservable, securities are classified within Level 3. Under current market conditions, assumptions used to determine the fair value of Level 3 securities have greater subjectivity due to the lack of observable market transactions.

Loans and Leases. The fair value of fixed rate loans and leases is estimated by discounting the future cash flows using the current rates at which similar loans and leases would be made to borrowers with similar credit ratings and for the same remaining maturities less an illiquidity discount. The fair value of variable and adjustable rate loans and leases approximates the carrying amount. Due to the significant judgment involved in evaluating credit quality, loans and leases are classified within Level 3 of the fair value hierarchy.

Derivative Assets and Liabilities. The Corporation determines its fair value for derivatives using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects contractual terms of the derivative, including the period to maturity and uses observable market based inputs, including interest rate curves and implied volatilities.

The Corporation incorporates credit valuation adjustments to appropriately reflect both its own non-performance risk and the respective counterparty’s non-performance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of non-performance risk, the Corporation considers the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts and guarantees.

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Although the Corporation has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by itself and its counterparties. However, as of March 31, 2015, the Corporation has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivatives. As a result, the Corporation has determined that its derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy.

Deposits. The estimated fair value of demand deposits, savings accounts and certain money market deposits is the amount payable on demand at the reporting date because of the customers’ ability to withdraw funds immediately. The fair value of fixed-maturity deposits is estimated by discounting future cash flows using rates currently offered for deposits of similar remaining maturities.

Short-Term Borrowings. The carrying amounts for short-term borrowings approximate fair value for amounts that mature in 90 days or less. The fair value of subordinated notes is estimated by discounting future cash flows using rates currently offered.

Long-Term Borrowings. The fair value of long-term borrowings is estimated by discounting future cash flows based on the market prices for the same or similar issues or on the current rates offered to the Corporation for debt of the same remaining maturities.

Loan Commitments and Standby Letters of Credit. Estimates of the fair value of these off-balance sheet items were not made because of the short-term nature of these arrangements and the credit standing of the counterparties. Also, unfunded loan commitments relate principally to variable rate commercial loans, typically are non-binding, and fees are not normally assessed on these balances.

Nature of Estimates. Many of the estimates presented herein are based upon the use of highly subjective information and assumptions and, accordingly, the results may not be precise. Management believes that fair value estimates may not be comparable to other financial institutions due to the wide range of permitted valuation techniques and numerous estimates which must be made. Further, because the disclosed fair value amounts were estimated as of the balance sheet date, the amounts actually realized or paid upon maturity or settlement of the various financial instruments could be significantly different.

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The fair values of the Corporation’s financial instruments are as follows:

					Fair Value Measurements
	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
March 31, 2015
Financial Assets
Cash and cash equivalents	$	234,246	$	234,246	$	234,246	$	—	$	—
Securities available for sale		1,537,080		1,537,080		212		1,535,079		1,789
Securities held to maturity		1,513,204		1,536,449		—		1,532,588		3,861
Net loans and leases, including loans held for sale		11,280,221		11,119,711		—		—		11,119,711
Derivative assets		57,551		57,551		—		57,551		—
Accrued interest receivable		41,935		41,935		41,935		—		—
Financial Liabilities
Deposits		11,806,043		11,812,401		9,217,159		2,595,242		—
Short-term borrowings		1,740,500		1,740,499		1,740,499		—		—
Long-term borrowings		541,474		541,955		—		—		541,955
Derivative liabilities		54,431		54,431		—		54,431		—
Accrued interest payable		6,511		6,511		6,511		—		—
December 31, 2014
Financial Assets
Cash and cash equivalents	$	287,393	$	287,393	$	287,393	$	—	$	—
Securities available for sale		1,534,065		1,534,065		218		1,531,952		1,895
Securities held to maturity		1,453,355		1,468,258		—		1,463,945		4,313
Net loans and leases, including loans held for sale		11,127,292		10,956,544		—		—		10,956,544
Derivative assets		45,898		45,898		—		45,898		—
Accrued interest receivable		40,231		40,231		40,231		—		—
Financial Liabilities
Deposits		11,382,208		11,382,402		8,771,173		2,611,229		—
Short-term borrowings		2,041,658		2,041,672		2,041,672		—		—
Long-term borrowings		541,443		539,007		—		—		539,007
Derivative liabilities		46,160		46,160		—		46,160		—
Accrued interest payable		6,689		6,689		6,689		—		—

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

Management’s Discussion and Analysis represents an overview of the consolidated results of operations and financial condition of the Corporation and highlights material changes to the financial condition and results of operations at and for the three-month period ended March 31, 2015. This Discussion and Analysis should be read in conjunction with the consolidated financial statements and notes thereto contained herein and the Corporation’s consolidated financial statements and notes thereto and Management’s Discussion and Analysis included in its 2014 Annual Report on Form 10-K filed with the SEC on February 27, 2015. The Corporation’s results of operations for the three months ended March 31, 2015 are not necessarily indicative of results expected for the full year ending December 31, 2015.

IMPORTANT CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING INFORMATION

The Corporation makes statements in this Report, and may from time to time make other statements, regarding its outlook for earnings, revenues, expenses, capital levels, liquidity levels, asset levels, asset quality and other matters regarding or affecting the Corporation and its future business and operations that are forward-looking statements within the meaning of the Private Securities Litigation Reform Act. Forward-looking statements are typically identified by words such as “believe,” “plan,” “expect,” “anticipate,” “see,” “look,” “intend,” “outlook,” “project,” “forecast,” “estimate,” “goal,” “will,” “should” and other similar words and expressions. Forward-looking statements are subject to numerous assumptions, risks and uncertainties, which change over time.

Forward-looking statements speak only as of the date made. The Corporation does not assume any duty and does not undertake to update forward-looking statements. Actual results or future events could differ, possibly materially, from those anticipated in forward-looking statements, as well as from historical performance.

The Corporation’s forward-looking statements are subject to the following principal risks and uncertainties:

• The Corporation’s businesses, financial results and balance sheet values are affected by business and economic conditions, including the following:

• Changes in interest rates and valuations in debt, equity and other financial markets.

• Disruptions in the liquidity and other functioning of U.S. and global financial markets.

• The impact of federal regulatory agencies that have oversight or review of the Corporation’s business and securities activities.

• Actions by the Board of Governors of the Federal Reserve System (FRB), UST and other government agencies, including those that impact money supply and market interest rates.

• Changes in customers’, suppliers’ and other counterparties’ performance and creditworthiness which adversely affect loan utilization rates, delinquencies, defaults and counterparty ability to meet credit and other obligations.

• Slowing or reversal of the rate of growth in the economy and employment levels and other economic factors that affect the Corporation’s liquidity and performance of its loan and lease portfolio, particularly in the markets in which the Corporation operates.

• Changes in customer preferences and behavior, whether due to changing business and economic conditions, legislative and regulatory initiatives, or other factors.

• Legal and regulatory developments could affect the Corporation’s ability to operate its businesses, financial condition, results of operations, competitive position, reputation, or pursuit of attractive acquisition opportunities. Reputational impacts could affect matters such as business generation and retention, liquidity, funding, and ability to attract and retain management. These developments could include:

• Changes resulting from legislative and regulatory reforms, including broad-based restructuring of financial industry regulation; changes to laws and regulations involving tax, pension, bankruptcy, consumer protection, and other industry aspects; and changes in accounting policies and principles. The Corporation will continue to be impacted by extensive reforms provided for in the Dodd-Frank Act and otherwise growing out of the recent financial crisis, the precise nature, extent and timing of which, and their impact on the Corporation, remains uncertain.

• Results of the regulatory examination and supervisory process.

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• Changes to regulations governing bank fees and business practices, capital and liquidity standards, including due to the Dodd-Frank Act, Volcker rule and Basel III initiatives.

• Impact on business and operating results of any costs associated with obtaining rights in intellectual property, the adequacy of the Corporation’s intellectual property protection in general, and the Corporation’s operational or security systems or infrastructure, or those of third party vendors or other service providers, and rapid technological developments and changes.

• Business and operating results are affected by judgments and assumptions in the Corporation’s analytical and forecasting models and its reliance on the advice of experienced outside advisors and its ability to identify and effectively manage risks inherent in its businesses, including, where appropriate, through effective use of third-party insurance, derivatives, swaps, and capital management techniques, and to meet evolving regulatory capital standards.

• As demonstrated by its earlier acquisitions, the Corporation grows its business in part by acquiring, from time to time, other financial services companies, financial services assets and related deposits. These acquisitions often present risks and uncertainties, including, the possibility that the transaction cannot be consummated; regulatory issues; cost, or difficulties involved in integration and conversion of the acquired businesses after closing; inability to realize expected cost savings, efficiencies and strategic advantages; the extent of credit losses in acquired loan portfolios; the extent of deposit attrition; and the potential dilutive effect to current shareholders.

• Competition can have an impact on customer acquisition, growth and retention and on credit spreads and product pricing, which can affect market share, loans, deposits and revenues. Industry restructuring in the current environment could also impact the Corporation’s business and financial performance through changes in counterparty creditworthiness and performance and the competitive and regulatory landscape. The Corporation’s ability to anticipate and respond to technological changes can also impact its ability to respond to customer needs and meet competitive demands.

• Business and operating results can also be affected by widespread disasters, dislocations, terrorist activities, cyber-attacks or international hostilities through their impacts on the economy and financial markets.

The Corporation provides more information regarding these risks and uncertainties in its 2014 Annual Report on Form 10-K, including the section titled “Risk Factors,” and in this Report.

CRITICAL ACCOUNTING POLICIES

A description of the Corporation’s critical accounting policies is included in the Management’s Discussion and Analysis of Financial Condition and Results of Operations section of the Corporation’s 2014 Annual Report on Form 10-K filed with the SEC on February 27, 2015 under the heading “Application of Critical Accounting Policies.” There have been no significant changes in critical accounting policies or the assumptions and judgments utilized in applying these policies since the year ended December 31, 2014.

USE OF NON-GAAP FINANCIAL MEASURES

In addition to evaluating its results of operations in accordance with GAAP, the Corporation routinely supplements its evaluation with an analysis of certain non-GAAP financial measures, such as return on average tangible common equity, return on average tangible assets and net interest income on a fully taxable equivalent (FTE) basis. The Corporation believes these non-GAAP financial measures provide information useful to investors in understanding the Corporation’s operating performance and trends, and facilitate comparisons with the performance of the Corporation’s peers. The non-GAAP financial measures used by the Corporation may differ from the non-GAAP financial measures other financial institutions use to measure their results of operations. Non-GAAP financial measures should be viewed in addition to, and not as an alternative for, the Corporation’s reported results prepared in accordance with GAAP.

OVERVIEW

The Corporation, headquartered in Pittsburgh, Pennsylvania is a diversified financial services company operating in six states and three major metropolitan areas, including Pittsburgh, Baltimore, Maryland and Cleveland, Ohio. As of March 31, 2015, the Corporation had 287 banking offices throughout Pennsylvania, Ohio, Maryland and West Virginia. The Corporation provides a full range of commercial banking, consumer banking and wealth management solutions through its subsidiary network which is led by its largest affiliate, FNBPA. Commercial banking solutions include corporate banking, small business banking, investment real estate financing, international banking, business credit, capital

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markets and lease financing. Consumer banking provides a full line of consumer banking products and services including deposit products, mortgage lending, consumer lending and a complete suite of mobile and online banking services. Wealth management services include asset management, private banking and insurance. The Corporation also operates Regency, which had 73 consumer finance offices in Pennsylvania, Ohio, Kentucky and Tennessee as of March 31, 2015.

RESULTS OF OPERATIONS

Three Months Ended March 31, 2015 Compared to the Three Months Ended March 31, 2014

Net income available to common stockholders for the three months ended March 31, 2015 was $38.3 million or $0.22 per diluted common share, compared to net income available to common stockholders for the three months ended March 31, 2014 of $32.2 million or $0.20 per diluted common share. The increase in net income available to common stockholders is a result of an increase of $14.1 million in net interest income, partially offset by a decrease of $3.9 million in non-interest income and increases of $1.1 million in the provision for credit losses and $0.5 million in non-interest expense. The results for the first quarter of 2015 reflect the full-quarter effect of the OBA and BCSB acquisitions that closed on September 19, 2014 and February 15, 2014, respectively. The results for the first quarter of 2014 included $5.3 million in merger costs, primarily relating to the BCSB acquisition. Quarterly average diluted common shares outstanding increased 11.9 million shares or 7.2% to 175.8 million shares for the first quarter of 2015, primarily as a result of the OBA and BCSB acquisitions.

For the three months ended March 31, 2015, the Corporation’s return on average equity was 8.02% and its return on average assets was 1.01%, compared to 7.65% and 1.00%, respectively, for the three months ended March 31, 2014. The Corporation’s return on average tangible common equity was 15.13% and its return on average tangible assets was 1.11% for the first quarter of 2015, compared to 15.26% and 1.11%, respectively, for the same period of 2014. Average equity was $2.0 billion and $1.8 billion for the first quarter of 2015 and 2014, respectively, while average tangible common equity was $1.1 billion and $0.9 billion, respectively, for those same periods. Average equity for the first quarter of 2015 reflects the impact of the OBA and BCSB acquisitions.

The following table shows how the Corporation’s non-GAAP ratios “return on average tangible common equity” and “return on average tangible assets” for the periods indicated were derived from amounts reported in the Corporation’s financial statements (dollars in thousands):

	Three Months Ended March 31,
	2015			2014
Return on Average Tangible Common Equity:
Net income (annualized)	$	163,614		$	140,013
Amortization of intangibles, net of tax (annualized)		5,576			6,019
	$	169,190		$	146,032
Average total stockholders’ equity	$	2,040,261		$	1,829,601
Less: Average preferred stockholders’ equity		(106,882	)		(106,882	)
Less: Average intangibles		(869,286	)		(827,344	)
	$	1,064,093		$	895,375
Return on average tangible common equity		15.13	%		15.26	%
Return on Average Tangible Assets:
Net income (annualized)	$	163,614		$	140,013
Amortization of intangibles, net of tax (annualized)		5,576			6,019
	$	169,190		$	146,032
Average total assets	$	16,147,232		$	13,989,304
Less: Average intangibles		(869,286	)		(827,344	)
	$	15,277,946		$	13,161,960
Return on average tangible assets		1.11	%		1.11	%

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The following table provides information regarding the average balances and yields earned on interest-earning assets and the average balances and rates paid on interest-bearing liabilities (dollars in thousands):

	Three Months Ended March 31,
	2015									2014
	Average Balance			Interest Income/ Expense			Yield/ Rate			Average Balance			Interest Income/ Expense			Yield/ Rate
Assets
Interest-earning assets:
Interest-bearing deposits with banks	$	75,707		$	32			0.17	%	$	46,193		$	26			0.23	%
Taxable investment securities (1)		2,815,252			14,214			2.02			2,346,808			12,450			2.07
Non-taxable investment securities (2)		168,501			2,116			5.02			149,611			1,996			5.34
Residential mortgage loans held for sale		4,833			63			5.22			4,844			136			11.16
Loans and leases (2) (3)		11,283,579			118,727			4.26			9,695,742			104,994			4.39
Total interest-earning assets (2)		14,347,872			135,152			3.81			12,243,198			119,602			3.95
Cash and due from banks		194,598									189,619
Allowance for credit losses		(128,697	)								(110,385	)
Premises and equipment		168,586									160,111
Other assets		1,564,873									1,506,761
Total Assets	$	16,147,232								$	13,989,304
Liabilities
Interest-bearing liabilities:
Deposits:
Interest-bearing demand	$	4,677,671			1,894			0.16		$	4,099,093			1,515			0.15
Savings		1,616,284			173			0.04			1,494,248			172			0.05
Certificates and other time		2,600,551			5,382			0.84			2,695,067			5,462			0.82
Customer repurchase agreements		830,646			456			0.22			827,851			462			0.22
Other short-term borrowings		1,053,939			1,312			0.50			390,707			757			0.78
Long-term borrowings		541,549			2,231			1.67			293,942			1,687			2.33
Total interest-bearing liabilities (2)		11,320,640			11,448			0.41			9,800,908			10,055			0.42
Non-interest-bearing demand		2,637,405									2,222,786
Other liabilities		148,926									136,009
Total Liabilities		14,106,971									12,159,703
Stockholders’ Equity		2,040,261									1,829,601
Total Liabilities and Stockholders’ Equity	$	16,147,232								$	13,989,304
Excess of interest-earning assets over interest-bearing liabilities	$	3,027,232								$	2,442,290
Fully tax-equivalent net interest income					123,704									109,547
Tax-equivalent adjustment					(1,783	)								(1,722	)
Net interest income				$	121,921								$	107,825
Net interest spread								3.40	%								3.53	%
Net interest margin (2)								3.48	%								3.62	%

(1) The average balances and yields earned on taxable investment securities are based on historical cost.

(2) The interest income amounts are reflected on a FTE basis, a non-GAAP measure, which adjusts for the tax benefit of income on certain tax-exempt loans and investments using the federal statutory tax rate of 35% for each period presented. The yields on earning assets and the net interest margin are presented on an FTE and annualized basis. The rates paid on interest-bearing liabilities are also presented on an annualized basis. The Corporation believes this measure to be the preferred industry measurement of net interest income and provides relevant comparison between taxable and non-taxable amounts.

(3) Average balances include non-accrual loans. Loans and leases consist of average total loans less average unearned income. The amount of loan fees included in interest income on loans is immaterial.

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Net Interest Income

Net interest income, which is the Corporation’s principal source of revenue, is the difference between interest income from earning assets (loans and leases, securities, interest-bearing deposits with banks and federal funds sold) and interest expense paid on liabilities (deposits, customer repurchase agreements and short- and long-term borrowings). For the three months ended March 31, 2015, net interest income, which comprised 76.2% of net revenue (net interest income plus non-interest income) compared to 71.9% for the same period in 2014, was affected by the general level of interest rates, changes in interest rates, the shape of the yield curve, the level of non-accrual loans and changes in the amount and mix of interest-earning assets and interest-bearing liabilities.

Net interest income, on an FTE basis, increased $14.2 million or 12.9% from $109.5 million for the first quarter of 2014 to $123.7 million for the first quarter of 2015. Average earning assets increased $2.1 billion or 17.2% and average interest-bearing liabilities increased $1.5 billion or 15.5% from 2014 due to the acquisitions of OBA and BCSB, combined with organic growth in loans and leases, deposits and customer repurchase agreements. The Corporation’s net interest margin was 3.48% for the first quarter of 2015, compared to 3.62% for the same period of 2014, as loan and lease yields declined faster than deposit rates primarily as a result of the current low interest rate environment, partially offset by an increase in net interest margin due to higher accretable yield adjustments. Accretable yield adjustments added 5 basis points to the net interest margin for the first quarter of 2015, compared to 2 basis points for the same period of 2014. Details on changes in tax-equivalent net interest income attributed to changes in interest-earning assets, interest-bearing liabilities, yields and cost of funds are set forth in the preceding table.

The following table sets forth certain information regarding changes in net interest income attributable to changes in the volumes of interest-earning assets and interest-bearing liabilities and changes in the rates for the three months ended March 31, 2015, compared to the three months ended March 31, 2014 (in thousands):

	Volume			Rate			Net
Interest Income
Interest bearing deposits with banks	$	13		$	(7	)	$	6
Securities		2,238			(354	)		1,884
Residential mortgage loans held for sale		—			(73	)		(73	)
Loans and leases		16,767			(3,034	)		13,733
		19,018			(3,468	)		15,550
Interest Expense
Deposits:
Interest bearing demand		298			81			379
Savings		1			—			1
Certificates and other time		(194	)		114			(80	)
Customer repurchase agreements		2			(8	)		(6	)
Other short-term borrowings		905			(350	)		555
Long-term borrowings		1,121			(577	)		544
		2,133			(740	)		1,393
Net Change	$	16,885		$	(2,728	)	$	14,157

(1) The amount of change not solely due to rate or volume changes was allocated between the change due to rate and the change due to volume based on the net size of the rate and volume changes.

(2) Interest income amounts are reflected on an FTE basis which adjusts for the tax benefit of income on certain tax-exempt loans and investments using the federal statutory tax rate of 35% for each period presented. The Corporation believes this measure to be the preferred industry measurement of net interest income and provides relevant comparison between taxable and non-taxable amounts.

Interest income, on an FTE basis, of $135.2 million for the first quarter of 2015, increased $15.6 million or 13.0% from the same quarter of 2014, primarily due to increased earning assets combined with accretable yield benefit, partially offset by lower yields. During the first quarter of 2015 and 2014, the Corporation recognized a benefit of $1.8 million and $0.6 million, respectively, in accretable yield adjustments on acquired loans. The increase in earning assets was primarily driven by a $1.6 billion or 16.4% increase in average loans and leases, including $1.1 billion or 11.5% of organic growth, which reflects the benefit of the Corporation’s expanded banking footprint and successful sales management. Additionally, average loans added in the OBA and BCSB acquisitions were $300.6 million and $312.6 million, respectively. The yield on earning assets decreased 14 basis points from the first quarter of 2014 to 3.81% for the first quarter of 2015, reflecting the decreases in market interest rates and competitive pressures, partially offset by the above-mentioned changes in accretable yield adjustments on acquired loans.

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Interest expense of $11.4 million for the first quarter of 2015 increased $1.4 million or 13.9% from the same quarter of 2014 due to growth in interest-bearing liabilities, partially offset by lower rates paid. The rate paid on interest-bearing liabilities decreased 1 basis point to 0.41% for the first quarter of 2015, reflecting changes in interest rates and a favorable shift in deposit mix to lower-cost transaction deposits and customer repurchase agreements. Given the absolute low level of interest rates and the current rates paid on the various deposit products, the Corporation believes there is limited opportunity for further reductions in the overall rate paid on interest-bearing liabilities. The growth in average interest-bearing liabilities was primarily attributable to growth in average deposits and customer repurchase agreements, which increased by $1.0 billion or 9.0%, including $454.1 million or 3.9% of organic growth, combined with $306.3 million and $526.2 million in average deposits and customer repurchase agreements added in the OBA and BCSB acquisitions, respectively.

Provision for Credit losses

The provision for credit losses is determined based on management’s estimates of the appropriate level of allowance for credit losses needed to absorb probable losses inherent in the existing loan and lease portfolio, after giving consideration to charge-offs and recoveries for the period.

The provision for credit losses of $8.1 million during the first quarter of 2015 increased $1.1 million from the same period of 2014, primarily due to an increase in the provision for the originated portfolio to support loan and lease growth. During the first quarter of 2015, net charge-offs were $5.6 million, or 0.20% (annualized) of average loans and leases, compared to $5.6 million, or 0.23% (annualized) of average loans and leases, for the same period of 2014. The ratio of the allowance for credit losses to total loans and leases equaled 1.13% at both March 31, 2015 and 2014, reflecting stability and consistency in the Corporation’s credit quality performance. The addition of loans acquired in the OBA and BCSB acquisitions did not carry a corresponding allowance for credit losses in accordance with acquired loan accounting rules. For additional information relating to the allowance and provision for credit losses, refer to the Allowance and Provision for Credit Losses section of this Management’s Discussion and Analysis.

Non-Interest Income

Total non-interest income of $38.2 million for the first quarter of 2015 decreased $3.9 million or 9.2% from the same period of 2014. The variances in significant individual non-interest income items are further explained in the following paragraphs.

Service charges on loans and deposits of $15.8 million for the first quarter of 2015 increased $0.5 million or 3.6% from the same period of 2014. Other service charges and fees increased $1.2 million or 19.0% over this same period, reflecting the impact of organic growth and the expanded customer base due to acquisitions. Customer-related interchange fees increased $0.2 million or 6.0% over this same period. For information relating to the impact of the regulations relating to interchange fees, refer to the Dodd-Frank Wall Street Reform and Consumer Protection Act section of this Management’s Discussion and Analysis.

Trust fees of $5.2 million for the first three months of 2015 increased $0.4 million or 8.3% from the same period of 2014, primarily driven by strong organic growth activity and improved market conditions. The market value of assets under management increased $437.1 million or 13.5% to $3.7 billion over this same period, with $385.1 million as a result of organic growth and $52.0 million due to improved stock market conditions.

Insurance commissions and fees of $4.4 million for the first quarter of 2015 decreased from $4.9 million during the same period of 2014, primarily due to reduced contingent fee income resulting from increases in claims and loss ratios during the first quarter of 2015 compared to the same period of 2014.

Securities commissions of $3.1 million for the first three months of 2015 increased $0.7 million or 27.8% from $2.4 million for the first three months of 2014, primarily due to positive results from new initiatives generating new customer relationships combined with increased volume and improved market conditions. Partially offsetting these increases were the costs associated with a system conversion combined with the impact of severe weather conditions throughout the Corporation’s market area in the first quarter of 2014.

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Net securities gains were $9.5 million for the first quarter of 2014. During this time, the Corporation strategically sold its entire portfolio of pooled TPS for net proceeds of $51.5 million and a gain of $13.8 million. Of the 23 pooled securities sold, one was determined to be a disallowed investment under the Volcker Rule of the Dodd-Frank Act, and as such, was required to be disposed of by July 2015. Partially offsetting this gain was a net loss of $4.3 million relating to the sale of other securities. By selling these securities, the Corporation strengthened the risk profile of its investment portfolio, improved its capital levels due to lowered risk-weighted assets and generated capital to support future growth. Net securities losses for the first quarter of 2015 were immaterial.

Mortgage banking revenue, which is primarily derived from the gain on sale of residential mortgage loans, was $1.8 million for the first three months of 2015 compared to $0.2 million for the same period of 2014 due to higher origination volume and successful cross-selling efforts generated from a strengthened mortgage management team. During the first quarter of 2015, the Corporation sold $72.6 million of residential mortgage loans, compared to $22.6 million for the same period of 2014, as part of its ongoing strategy of generally selling 30-year fixed rate residential mortgage loans.

Income from bank owned life insurance (BOLI) of $1.8 million for the first quarter of 2015 decreased $0.3 million or 15.7% from the same period of 2014, primarily as a result of fewer death claims.

Other non-interest income of $6.1 million for the first quarter of 2015 increased $3.3 million from the first quarter of 2014. During the first quarter of 2015, the Corporation recorded $1.6 million more in fees earned through its commercial loan interest rate swap program, reflecting strong commercial loan growth in 2014 and demand for these products given the interest rate environment. Additionally, the Corporation recorded $1.2 million more in dividends on non-marketable equity securities, primarily resulting from a special dividend paid by the FHLB totaling $1.0 million. Also during the first quarter of 2015, the Corporation recorded $0.4 million more in gains from an equity investment and a gain of $0.4 million relating to the settlement of an insurance benefit. During the first quarter of 2014, the Corporation recorded a gain of $0.7 million related to the sale of impaired commercial loans.

Non-Interest Expense

Total non-interest expense of $94.7 million for the first quarter of 2015 increased $0.5 million or 0.5% from the same period of 2014. The variances in the individual non-interest expense items are further explained in the following paragraphs with an overriding theme of the expense increases primarily related to the expanded operations from acquisitions.

Salaries and employee benefits of $49.3 million for the first three months of 2015 increased $0.3 million or 0.6% from the same period of 2014. This increase primarily relates to employees added in conjunction with the OBA and BCSB acquisitions, combined with new hires, merit increases and higher medical insurance costs in 2015. Additionally, during the first quarter of 2014, the Corporation recorded a net charge of $1.9 million relating to the mutual conclusion of a consulting agreement with a retired executive.

Occupancy and equipment expense of $16.6 million for the first three months of 2015 increased $1.2 million or 8.1% from the same period of 2014, primarily resulting from acquisitions, combined with an increase in rental expense relating to the Pittsburgh headquarters and regional headquarters in Cleveland, Ohio and Baltimore, Maryland. Additionally, the Corporation’s continued focus on new technology, both in meeting customer needs via the utilization of electronic delivery channels, such as online and mobile banking, and in meeting the continued regulatory requirements, such as stress testing, resulted in an increase of $0.7 million in equipment expense during the first quarter of 2015.

Amortization of intangibles expense of $2.1 million for the first quarter of 2015 decreased $0.2 million or 7.4% from the first quarter of 2014, due to a combination of certain intangible assets being completely amortized during 2014 and lower amortization expense on some intangible assets due to accelerated amortization methods.

Outside services expense of $8.8 million for the first quarter of 2015 increased $1.5 million or 21.3% from the same period of 2014. For the first three months of 2015, compared to the same period of 2014, other outside services and data processing services increased $0.4 million and $0.1 million, respectively, primarily resulting from the OBA and BCSB acquisitions and costs related to compliance with new regulations. Additionally, consulting fees increased $0.8 million during this same period due to a refund of previously paid fees for system enhancements during the first quarter of 2014.

Federal Deposit Insurance Corporation (FDIC) insurance of $3.7 million for the first quarter of 2015 increased $0.7 million or 23.2% from the same period of 2014 due to an increased asset base resulting from acquisitions.

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The Corporation recorded $5.3 million in merger-related costs associated with the BCSB acquisition during the first quarter of 2014. No merger-related costs were recorded during the first quarter of 2015.

Other non-interest expense increased $2.2 million to $14.2 million for the first three months of 2015, compared to $12.0 million for the first three months of 2014. For the first quarter of 2015, compared to the same quarter of 2014, loan-related expenses increased $0.5 million, state taxes increased $0.4 million and fraud losses increased $0.2 million, all primarily due to acquisitions and volume increases related to organic growth. Additionally, the Corporation recorded $1.2 million during the first quarter of 2015 relating to insurance processing adjustments.

Income Taxes

The Corporation’s income tax expense of $17.0 million for the first quarter of 2015 increased $2.8 million or 19.5% from the same period of 2014. The effective tax rate of 29.6% for the first quarter of 2015 increased from 29.1% for the same period of 2014, due to higher levels of pre-tax income, which is subject to the marginal tax rate of 35%. Both periods’ tax rates are lower than the 35% federal statutory tax rate due to the tax benefits primarily resulting from tax-exempt income on investments, loans and BOLI, as well as tax credits.

LIQUIDITY

The Corporation’s goal in liquidity management is to satisfy the cash flow requirements of customers and the operating cash needs of the Corporation with cost-effective funding. The Board of Directors of the Corporation has established an Asset/Liability Management Policy in order to achieve and maintain earnings performance consistent with long-term goals while maintaining acceptable levels of interest rate risk, a “well-capitalized” balance sheet and adequate levels of liquidity. The Board of Directors of the Corporation has also established a Contingency Funding Policy to address liquidity crisis conditions. These policies designate the Corporate Asset/Liability Committee (ALCO) as the body responsible for meeting these objectives. The ALCO, which includes members of executive management, reviews liquidity on a periodic basis and approves significant changes in strategies that affect balance sheet or cash flow positions. Liquidity is centrally managed on a daily basis by the Corporation’s Treasury Department.

FNBPA generates liquidity from its normal business operations. Liquidity sources from assets include payments from loans and investments, as well as the ability to securitize, pledge or sell loans, investment securities and other assets. Liquidity sources from liabilities are generated primarily through the banking offices of FNBPA in the form of deposits and customer repurchase agreements. The Corporation also has access to reliable and cost-effective wholesale sources of liquidity. Short- and long-term funds can be acquired to help fund normal business operations, as well as to serve as contingency funding in the event that the Corporation would be faced with a liquidity crisis.

The principal sources of the parent company’s liquidity are its strong existing cash resources plus dividends it receives from its subsidiaries. These dividends may be impacted by the parent’s or its subsidiaries’ capital needs, statutory laws and regulations, corporate policies, contractual restrictions, profitability and other factors. Cash on hand at the parent has been favorably impacted by management strategies over the last few years. These include strong earnings, a consistent dividend and capital actions. The capital actions include the raising of $161.3 million via the issuance of common and preferred equity during the fourth quarter of 2013. These proceeds were utilized to redeem various TPS obligations of the Corporation totaling $148.0 million, with $115.0 million occurring during the fourth quarter of 2013, $23.0 million occurring during the first quarter of 2014 and $10.0 million occurring during the second quarter of 2014. Additionally, the Corporation repurchased $15.0 million of TPS obligations during the second quarter of 2013. The positive results of these strategies can be seen in the parent’s strong cash position. The cash position decreased slightly from $129.3 million at December 31, 2014 to $126.2 million at March 31, 2015.

Management believes cash levels for the Corporation are appropriate given the current environment. Two metrics that are used to gauge the adequacy of the parent company’s cash position are the Liquidity Coverage Ratio (LCR) and Months of Cash on Hand (MCH). The LCR is defined as the sum of cash on hand plus projected cash inflows over the next 12 months divided by projected cash outflows over the next 12 months. The LCR was 2.2 times at both March 31, 2015 and December 31, 2014. The internal limit for LCR is for the ratio to be greater than 1.0 time. The MCH is defined as the number of months of corporate expenses that can be covered by the cash on hand. The MCH was 13.9 months at March 31, 2015 and 14.2 months at December 31, 2014. The internal limit for MCH is for the ratio to be greater than 12 months. In addition, the Corporation issues subordinated notes on a regular basis. Subordinated notes decreased $0.7 million or 0.3% during the first quarter of 2015 to $211.4 million at March 31, 2015.

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The liquidity position of the Corporation continues to be strong as evidenced by its ability to generate growth in relationship-based accounts. On a period-end basis, organic growth in total deposits and customer repurchase agreements was strong at $298.4 million, or 9.9% annualized. On a period-end basis, organic growth in transaction deposits and customer repurchase agreements was strong at $320.3 million, or 13.5% annualized. Average time deposits organically declined $39.7 million or 6.1% annualized on an average basis and $29.1 million or 3.4% annualized on a period-end basis over this same period. The decline reflects the plan to reduce these accounts due to the Corporation’s strong liquidity position and customers shifting to lower cost transactional products.

FNBPA had unused wholesale credit availability of $5.0 billion or 30.8% of bank assets at March 31, 2015 and $4.6 billion or 29.1% of bank assets at December 31, 2014. These sources include the availability to borrow from the FHLB, the FRB, correspondent bank lines and access to brokered certificates of deposit. In addition to credit availability, FNBPA also possesses salable unpledged government and agency securities which could be sold to meet funding needs. These securities totaled $924.4 million, or 5.7% of total assets and $1.1 billion, or 6.6% of total assets as of March 31, 2015 and December 31, 2014, respectively. The ALCO Policy minimum level is 3.0%.

Another metric for measuring liquidity risk is the liquidity gap analysis. The following liquidity gap analysis (in thousands) for the Corporation as of March 31, 2015 compares the difference between cash flows from existing assets and liabilities over future time intervals. Management seeks to limit the size of the liquidity gaps so that sources and uses of funds are reasonably matched in the normal course of business. A reasonably matched position lays a better foundation for dealing with additional funding needs during a potential liquidity crisis. The twelve-month cumulative gap to total assets was 1.1% and (1.0)% as of March 31, 2015 and December 31, 2014, respectively.

	Within 1 Month			2-3 Months			4-6 Months			7-12 Months			Total 1 Year
Assets
Loans and leases	$	309,282		$	518,332		$	705,979		$	1,371,286		$	2,904,879
Investments		86,106			91,477			137,398			362,573			677,554
		395,388			609,809			843,377			1,733,859			3,582,433
Liabilities
Non-maturity deposits		86,009			172,018			258,027			516,055			1,032,109
Time deposits		146,445			273,124			375,669			495,360			1,290,598
Borrowings		774,220			135,766			55,130			114,358			1,079,474
		1,006,674			580,908			688,826			1,125,773			3,402,181
Period Gap (Assets - Liabilities)	$	(611,286	)	$	28,901		$	154,551		$	608,086		$	180,252
Cumulative Gap	$	(611,286	)	$	(582,385	)	$	(427,834	)	$	180,252
Cumulative Gap to Total Assets		(3.8	)%		(3.6	)%		(2.6	)%		1.1	%

In addition, the ALCO regularly monitors various liquidity ratios and stress scenarios of the Corporation’s liquidity position. The stress scenarios forecast that adequate funding will be available even under severe conditions. Management believes the Corporation has sufficient liquidity available to meet its normal operating and contingency funding cash needs.

MARKET RISK

Market risk refers to potential losses arising from changes in interest rates, foreign exchange rates, equity prices and commodity prices. The Corporation is primarily exposed to interest rate risk inherent in its lending and deposit-taking activities as a financial intermediary. To succeed in this capacity, the Corporation offers an extensive variety of financial products to meet the diverse needs of its customers. These products sometimes contribute to interest rate risk for the Corporation when product groups do not complement one another. For example, depositors may want short-term deposits while borrowers desire long-term loans.

Changes in market interest rates may result in changes in the fair value of the Corporation’s financial instruments, cash flows and net interest income. The ALCO is responsible for market risk management which involves devising policy guidelines, risk measures and limits, and managing the amount of interest rate risk and its effect on net interest income and capital. The Corporation uses derivative financial instruments for interest rate risk management purposes and not for trading or speculative purposes.

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Interest rate risk is comprised of repricing risk, basis risk, yield curve risk and options risk. Repricing risk arises from differences in the cash flow or repricing between asset and liability portfolios. Basis risk arises when asset and liability portfolios are related to different market rate indexes, which do not always change by the same amount. Yield curve risk arises when asset and liability portfolios are related to different maturities on a given yield curve; when the yield curve changes shape, the risk position is altered. Options risk arises from “embedded options” within asset and liability products as certain borrowers have the option to prepay their loans when rates fall, while certain depositors can redeem their certificates of deposit early when rates rise.

The Corporation uses an asset/liability model to measure its interest rate risk. Interest rate risk measures utilized by the Corporation include earnings simulation, economic value of equity (EVE) and gap analysis.

Gap analysis and EVE are static measures that do not incorporate assumptions regarding future business. Gap analysis, while a helpful diagnostic tool, displays cash flows for only a single rate environment. EVE’s long-term horizon helps identify changes in optionality and longer-term positions. However, EVE’s liquidation perspective does not translate into the earnings-based measures that are the focus of managing and valuing a going concern. Net interest income simulations explicitly measure the exposure to earnings from changes in market rates of interest. In these simulations, the Corporation’s current financial position is combined with assumptions regarding future business to calculate net interest income under various hypothetical rate scenarios. The ALCO reviews earnings simulations over multiple years under various interest rate scenarios on a periodic basis. Reviewing these various measures provides the Corporation with a comprehensive view of its interest rate risk profile.

The following repricing gap analysis (in thousands) as of March 31, 2015 compares the difference between the amount of interest-earning assets and interest-bearing liabilities subject to repricing over a period of time. Management utilizes the repricing gap analysis as a diagnostic tool in managing net interest income and EVE risk measures.

	Within 1 Month			2-3 Months			4-6 Months			7-12 Months			Total 1 Year
Assets
Loans and leases	$	3,976,364		$	1,138,392		$	581,686		$	1,057,756		$	6,754,198
Investments		89,051			103,069			148,750			401,431			742,301
		4,065,415			1,241,461			730,436			1,459,187			7,496,499
Liabilities
Non-maturity deposits		2,919,717			—			—			—			2,919,717
Time deposits		151,082			274,966			377,162			497,139			1,300,349
Borrowings		1,501,587			128,154			11,462			27,022			1,668,225
		4,572,386			403,120			388,624			524,161			5,888,291
Off-balance sheet		(200,000	)		—			—			—			(200,000	)
Period Gap (assets – liabilities + off-balance sheet)	$	(706,971	)	$	838,341		$	341,812		$	935,026		$	1,408,208
Cumulative Gap	$	(706,971	)	$	131,370		$	473,182		$	1,408,208
Cumulative Gap to Assets		(4.3	)%		0.8	%		2.9	%		8.6	%

The twelve-month cumulative repricing gap to total assets was 8.6% and 6.7% as of March 31, 2015 and December 31, 2014, respectively. The positive cumulative gap positions indicate that the Corporation has a greater amount of repricing earning assets than repricing interest-bearing liabilities over the subsequent twelve months. If interest rates increase then net interest income will increase and, conversely, if interest rates decrease then net interest income will decrease.

The allocation of non-maturity deposits and customer repurchase agreements to the one-month maturity category above is based on the estimated sensitivity of each product to changes in market rates. For example, if a product’s rate is estimated to increase by 50% as much as the market rates, then 50% of the account balance was placed in this category.

The following net interest income metrics were calculated using rate shocks which move market rates in an immediate and parallel fashion. The variance percentages represent the change between the net interest income or EVE calculated under the particular rate scenario versus the net interest income or EVE that was calculated assuming market rates as of March 31, 2015.

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The following table presents an analysis of the potential sensitivity of the Corporation’s net interest income and EVE to changes in interest rates:

	March 31, 2015			December 31, 2014			ALCO Limits
Net interest income change (12 months):
+ 300 basis points		4.0	%		3.3	%		n/a
+ 200 basis points		2.9	%		2.4	%		(5.0	)%
+ 100 basis points		1.4	%		1.1	%		(5.0	)%
- 100 basis points		(2.4	)%		(2.2	)%		(5.0	)%
Economic value of equity:
+ 300 basis points		0.3	%		(1.2	)%		(25.0	)%
+ 200 basis points		1.2	%		(0.1	)%		(15.0	)%
+ 100 basis points		1.3	%		0.6	%		(10.0	)%
- 100 basis points		(7.3	)%		(6.3	)%		(10.0	)%

The Corporation also models rate scenarios which move all rates gradually over twelve months (Rate Ramps) and also scenarios that gradually change the shape of the yield curve. A +300 basis point Rate Ramp increases net interest income (12 months) by 2.8% and 2.5% at March 31, 2015 and December 31, 2014, respectively.

The Corporation’s strategy is generally to manage to a neutral interest rate risk position. However, given the current interest rate environment, the interest rate risk position has been managed to a modestly asset-sensitive position. Currently, rising rates are expected to have a modest, positive effect on net interest income versus net interest income if rates remained unchanged.

The ALCO utilizes several tactics to manage the Corporation’s interest rate risk position. As mentioned earlier, the growth in transaction deposits provides funding that is less interest rate-sensitive than time deposits and wholesale borrowings. On the lending side, the Corporation regularly sells long-term fixed-rate residential mortgages to the secondary market and has been successful in the origination of consumer and commercial loans with short-term repricing characteristics. Total variable and adjustable-rate loans and leases were 57.9% of total loans and leases as of both March 31, 2015 and December 31, 2014. The investment portfolio is used, in part, to manage the Corporation’s interest rate risk position. The Corporation has managed the duration of its investment portfolio over the last year to be relatively unchanged from the prior year end, resulting in a portfolio duration of 3.2 and 3.3 at March 31, 2015 and December 31, 2014, respectively. Finally, the Corporation has made use of interest rate swaps to commercial borrowers (commercial swaps) to manage its interest rate risk position as the commercial swaps effectively increase adjustable-rate loans. As of March 31, 2015, the commercial swaps totaled $1.0 billion of notional principal, with $98.1 million in notional swap principal originated during the first quarter of 2015. The success of the aforementioned tactics has resulted in an asset-sensitive position. For additional information regarding interest rate swaps, see the Derivative and Hedging Activities footnote in this Report.

The Corporation desired to remain modestly asset-sensitive during the first quarter of 2015. A number of management actions and market occurrences resulted in virtually no change to the Corporation’s interest rate risk position. These included a decrease in long-term interest rates which caused cash flows from certain mortgage-related portfolios to shorten, which contributed to an increase in the asset-sensitive interest rate risk position during the period. Organic balance sheet growth provided less rate sensitive deposits. These increases in the net asset-sensitivity position were aided by a decrease in the use of overnight and short-term borrowings compared to the prior year end. Overnight and short-term borrowings decreased by $175.0 million for the first quarter of 2015.

The Corporation recognizes that all asset/liability models have some inherent shortcomings. Asset/liability models require certain assumptions to be made, such as prepayment rates on interest-earning assets and repricing impact on non-maturity deposits, which may differ from actual experience. These business assumptions are based upon the Corporation’s experience, business plans and available industry data. While management believes such assumptions to be reasonable, there can be no assurance that modeled results will be achieved. Furthermore, the metrics are based upon the balance sheet structure as of the valuation date and do not reflect the planned growth or management actions that could be taken.

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RISK MANAGEMENT

The Corporation’s Board of Directors recognizes that, as a financial institution, the Corporation takes on a certain amount of risk in every business decision, transaction and activity. The Corporation’s Board of Directors and senior management have identified seven major categories of risk: credit risk, market risk, liquidity risk, reputational risk, operational risk, regulatory compliance risk and strategic risk. In its oversight role of the Corporation’s risk management function, the Board of Directors is mindful that risk management is not about eliminating risk, but rather is about identifying, understanding and managing risks so as to optimize total shareholder value, while balancing prudent business and safety and soundness considerations.

The Corporation supports its risk management process through a governance structure involving its Board of Directors and senior management. The Corporation’s Risk Committee helps ensure that business decisions in the organization are executed within its desired risk appetite. The Risk Committee has the following oversight responsibilities:

• identification, measurement, assessment and monitoring of enterprise-wide risk across the Corporation and its subsidiaries;

• development of appropriate and meaningful risk metrics to use in connection with the oversight of the Corporation’s businesses and strategies;

• review and assessment of the Corporation’s policies and practices to manage the Corporation’s credit, market, liquidity, legal, regulatory and operating risk (including technology, operational, compliance and fiduciary risks); and

• identification and implementation of risk management best practices.

The Risk Committee serves as the primary point of contact between the Corporation’s Board of Directors and the Risk Management Council, which is the senior management level committee responsible for the Corporation’s risk management.

As noted above, the Corporation has a Risk Management Council comprised of senior management. The purpose of this committee is to provide regular oversight of specific areas of risk with respect to the level of risk and risk management structure. Management has also established an Operational Risk Committee that is responsible for identifying, evaluating and monitoring operational risks across the Corporation. The Operational Risk Committee is responsible for evaluating and approving appropriate remediation efforts to address identified operational risks. The Operational Risk Committee provides periodic reports concerning operational risks to the Risk Management Council. The Risk Management Council reports on a regular basis to the Corporation’s Risk Committee regarding the enterprise-wide risk profile of the Corporation and other significant risk management issues. The Corporation’s Chief Risk Officer is responsible for the design and implementation of the Corporation’s enterprise-wide risk management strategy and framework and ensures the coordinated and consistent implementation of risk management initiatives and strategies on a day-to-day basis. The Corporation’s Compliance Department, which reports to the Chief Risk Officer, is responsible for developing policies and procedures and monitoring compliance with applicable laws and regulations. Further, the Corporation’s audit function performs an independent assessment of the Corporation’s internal controls environment and plays an integral role in testing the operation of internal controls systems and reporting findings to management and the Corporation’s Audit Committee. Both the Corporation’s Risk Committee and Audit Committee regularly report on risk-related matters to the Corporation’s Board of Directors. In addition, both the Corporation’s Risk Committee and the Risk Management Council regularly assess the Corporation’s enterprise-wide risk profile and provide guidance on actions needed to address key and emerging risk issues.

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The Board of Directors believes that the Corporation’s enterprise-wide risk management process is effective since it includes the following material components:

• enables the Board of Directors to assess the quality of the information it receives;

• enables the Board of Directors to understand the businesses, investments and financial, accounting, legal, regulatory and strategic considerations of the Corporation and its subsidiaries, and the risks that they face;

• enables the Board of Directors to oversee and assess how senior management evaluates risk; and

• enables the Board of Directors to assess appropriately the quality of the Corporation’s enterprise-wide risk management process.

DEPOSITS AND CUSTOMER REPURCHASE AGREEMENTS

Following is a summary of deposits and customer repurchase agreements (in thousands):

	March 31, 2015		December 31, 2014
Non-interest-bearing demand	$	2,728,599	$	2,647,623
Interest-bearing demand		4,724,985		4,547,628
Savings		1,763,275		1,575,922
Certificates of deposit and other time deposits		2,589,184		2,611,035
Total deposits		11,806,043		11,382,208
Customer repurchase agreements		757,279		882,696
Total deposits and customer repurchase agreements	$	12,563,322	$	12,264,904

Total deposits and customer repurchase agreements increased by $298.4 million, or 2.4%, to $12.6 billion at March 31, 2015, compared to December 31, 2014, primarily as a result of organic growth in relationship-based transaction deposits, which are comprised of demand (non-interest-bearing and interest-bearing) and savings accounts, partially offset by decreases in customer repurchase agreements and certificates of deposit and other time deposits. Generating growth in relationship-based transaction deposits and customer repurchase agreements remains a key focus of the Corporation.

NON-PERFORMING ASSETS

During the first three months of 2015, non-performing loans and OREO decreased $2.2 million, from $110.0 million at December 31, 2014 to $107.8 million at March 31, 2015. This decrease reflects reductions of $1.4 million and $0.7 million in TDRs and OREO, respectively. Non-accrual loans also decreased slightly over this same period. The decrease in TDRs was attributed to a shift in residential secured modifications from the non-performing category to performing, while the decrease in OREO was a result of sales activity outpacing transfers in, particularly in the residential portfolio.

Following is a summary of non-performing loans, by class (in thousands):

	March 31, 2015		December 31, 2014
Commercial real estate	$	25,851	$	26,134
Commercial and industrial		9,374		8,852
Commercial leases		732		722
Total commercial loans and leases		35,957		35,708
Direct installment		14,669		15,901
Residential mortgages		13,570		13,842
Indirect installment		1,265		1,305
Consumer lines of credit		1,590		1,796
Other		—		—
	$	67,051	$	68,552

55

Following is a summary of performing, non-performing and non-accrual TDRs, by class (in thousands):

	Performing		Non- Performing		Non-Accrual		Total
March 31, 2015
Commercial real estate	$	—	$	2,198	$	6,042	$	8,240
Commercial and industrial		718		528		129		1,375
Commercial leases		—		—		—		—
Total commercial loans and leases		718		2,726		6,171		9,615
Direct installment		5,950		8,205		1,387		15,542
Residential mortgages		5,534		9,945		300		15,779
Indirect installment		—		154		42		196
Consumer lines of credit		591		992		140		1,723
Other		—		—		—		—
	$	12,793	$	22,022	$	8,040	$	42,855
December 31, 2014
Commercial real estate	$	—	$	2,002	$	6,188	$	8,190
Commercial and industrial		727		542		132		1,401
Commercial leases		—		—		—		—
Total commercial loans and leases		727		2,544		6,320		9,591
Direct installment		4,830		8,784		1,352		14,966
Residential mortgages		3,689		10,878		503		15,070
Indirect installment		—		156		47		203
Consumer lines of credit		195		1,077		50		1,322
Other		—		—		—		—
	$	9,441	$	23,439	$	8,272	$	41,152

ALLOWANCE FOR CREDIT LOSSES

The allowance for credit losses of $128.5 million at March 31, 2015 increased $2.6 million or 2.0% from December 31, 2014, primarily in support of growth in originated loans and leases. The provision for credit losses during the three months ended March 31, 2015 was $8.1 million, covering net charge-offs of $5.6 million with the remainder primarily supporting strong organic loan and lease growth. The allowance for credit losses as a percentage of non-performing loans for the Corporation’s total portfolio increased from 172.06% as of December 31, 2014 to 180.83% as of March 31, 2015.

Following is a summary of supplemental statistical ratios pertaining to the Corporation’s originated loans and leases portfolio. The originated loans and leases portfolio excludes loans acquired at fair value and accounted for in accordance with ASC 805. The decline in each ratio is consistent with generally positive trends in asset quality, particularly in all commercial loans and leases segments.

	At or For the Three Months Ended
	March 31, 2015			December 31, 2014			March 31, 2014
Non-performing loans/total originated loans and leases		0.68	%		0.71	%		0.95	%
Non-performing loans + OREO/total originated loans and leases + OREO		1.08	%		1.13	%		1.46	%
Allowance for credit losses (originated loans)/total originated loans and leases		1.22	%		1.22	%		1.28	%
Net charge-offs on originated loans and leases (annualized)/total average originated loans and leases		0.24	%		0.17	%		0.28	%

56

CAPITAL RESOURCES AND REGULATORY MATTERS

The access to, and cost of, funding for new business initiatives, including acquisitions, the ability to engage in expanded business activities, the ability to pay dividends and the level and nature of regulatory oversight depend, in part, on the Corporation’s capital position.

The assessment of capital adequacy depends on a number of factors such as asset quality, liquidity, earnings performance, changing competitive conditions and economic forces. The Corporation seeks to maintain a strong capital base to support its growth and expansion activities, to provide stability to current operations and to promote public confidence.

The Corporation has an effective shelf registration statement filed with the SEC. Pursuant to this registration statement, the Corporation may, from time to time, issue and sell in one or more offerings any combination of common stock, preferred stock, debt securities, depositary shares, warrants, stock purchase contracts or units.

Capital management is a continuous process with capital plans and stress testing for the Corporation and FNBPA updated annually. These capital plans include assessing the adequacy of expected capital levels assuming various scenarios by projecting capital needs for a forecast period of 2-3 years beyond the current year. From time to time, the Corporation issues shares initially acquired by the Corporation as treasury stock under its various benefit plans. The Corporation may continue to grow through acquisitions, which can potentially impact its capital position. The Corporation may issue additional preferred or common stock in order to maintain its well-capitalized status.

The Corporation and FNBPA are subject to various regulatory capital requirements administered by the federal banking agencies (see discussion under “Enhanced Capital Standards”). Quantitative measures established by regulators to ensure capital adequacy require the Corporation and FNBPA to maintain minimum amounts and ratios of total, tier 1 and common equity tier 1 capital (as defined in the regulations) to risk-weighted assets (as defined) and of leverage ratio (as defined). Failure to meet minimum capital requirements can initiate certain mandatory, and possibly additional discretionary actions, by regulators that, if undertaken, could have a direct material effect on the Corporation’s consolidated financial statements and future merger and acquisition activity. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Corporation and FNBPA must meet specific capital guidelines that involve quantitative measures of assets, liabilities and certain off-balance sheet items as calculated under regulatory accounting practices. The Corporation’s and FNBPA’s capital amounts and classifications are also subject to qualitative judgments by the regulators about components, risk weightings and other factors.

The Corporation’s management believes that, as of March 31, 2015 and December 31, 2014, the Corporation and FNBPA met all “well-capitalized” requirements to which each of them was subject.

As of March 31, 2015, the most recent notification from the federal banking agencies categorized the Corporation and FNBPA as “well-capitalized” under the regulatory framework for prompt corrective action. There are no conditions or events since the notification which management believes have changed this categorization.

During the first six months of 2014, the Corporation redeemed $33.0 million of the Corporation-issued TPS using proceeds raised in conjunction with its capital raise completed in November 2013. The regulatory capital ratios at March 31, 2015 reflect both this decrease in TPS and the new Basel III requirements. Accordingly, $14.4 million, or 25% of the TPS, are included in tier 1 capital and the remaining $43.1 million, or 75%, are included in tier 2 capital. Additionally, during the first quarter of 2014, the Corporation strategically sold its entire portfolio of pooled TPS, which strengthened the risk profile of its investment portfolio, improved its capital levels due to lowered risk-weighted assets and generated capital to support future growth.

57

Following are the capital amounts and related ratios as of March 31, 2015 and December 31, 2014 for the Corporation and FNBPA (dollars in thousands):

	Actual					Well-Capitalized Requirements					Minimum Capital Requirements
	Amount		Ratio			Amount		Ratio			Amount		Ratio
March 31, 2015
F.N.B. Corporation
Total capital	$	1,460,428		11.7	%	$	1,247,244		10.0	%	$	997,795		8.0	%
Tier 1 capital		1,268,105		10.2			997,795		8.0			748,346		6.0
Common equity tier 1		1,146,848		9.2			810,709		6.5			561,260		4.5
Leverage		1,268,105		8.3			765,156		5.0			612,125		4.0
FNBPA
Total capital		1,361,156		11.0			1,237,211		10.0			989,769		8.0
Tier 1 capital		1,237,705		10.0			989,769		8.0			494,884		4.0
Common equity tier 1		1,157,705		9.4			804,187		6.5			556,745		4.5
Leverage		1,237,705		8.2			757,371		5.0			605,897		4.0
December 31, 2014
F.N.B. Corporation
Total capital	$	1,417,369		12.4	%	$	1,146,556		10.0	%	$	917,245		8.0	%
Tier 1 capital		1,269,033		11.1			687,934		6.0			458,623		4.0
Leverage		1,269,033		8.4			752,593		5.0			602,074		4.0
FNBPA
Total capital		1,321,433		11.5			1,147,427		10.0			917,941		8.0
Tier 1 capital		1,200,776		10.5			688,456		6.0			458,971		4.0
Leverage		1,200,776		8.1			744,235		5.0			595,388		4.0

The information presented in the table above reflects well-capitalized and minimum capital requirements in accordance with Basel III standards for the period ended March 31, 2015. The capital requirements presented for December 31, 2014 are based on the regulations that were in effect at that time.

DODD-FRANK WALL STREET REFORM AND CONSUMER PROTECTION ACT

The Dodd-Frank Act broadly affects the financial services industry by establishing a framework for systemic risk oversight, creating a resolution authority for institutions determined to be systemically important, mandating higher capital and liquidity requirements, requiring banks to pay increased fees to regulatory agencies and containing numerous other provisions aimed at strengthening the sound operation of the financial services sector that will fundamentally change the system of regulatory oversight as described in more detail under Part I, Item 1, “Business—Government Supervision and Regulation” included in the Corporation’s 2014 Annual Report on Form 10-K as filed with the SEC on February 27, 2015. Many aspects of the Dodd-Frank Act are subject to further rulemaking and will take effect over several years, making it difficult to anticipate the overall financial impact to the Corporation or across the financial services industry.

ENHANCED REGULATORY CAPITAL STANDARDS

Regulatory capital reform initiatives continue to be updated and released which may impose additional conditions and restrictions on the Corporation’s current business practices and capital strategies.

In July 2013, the FRB approved a final rule that implements changes to the regulatory capital framework for all banking organizations. The final rule implements the regulatory capital reforms recommended by the Basel III capital framework and the regulatory capital reforms required by the Dodd-Frank Act. These reforms seek to strengthen the components of regulatory capital by increasing the quantity and quality of capital held by banking organizations, increasing risk-based capital requirements and make selected changes to the calculation of risk-weighted assets.

58

Following are some of the key provisions resulting from the final rule:

• revises the components of regulatory capital to phase out certain TPS for banking organizations with greater than $15.0 billion in total assets;

• adds a new minimum common equity Tier 1 (CET1) ratio of 4.5% of risk-weighted assets;

• implements a new capital conservation buffer of CET1 equal to 2.5% of risk-weighted assets, which will be in addition to the 4.5% CET1 ratio and phased in over a three-year period beginning January 1, 2016;

• increases the minimum Tier 1 capital ratio requirement from 4.0% to 6.0%:

• revises the prompt corrective action thresholds;

• retains the existing risk-based capital treatment for 1-4 family residential mortgages;

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

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

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

The final rule, which became effective for the Corporation on January 1, 2015, includes a phase-in period through January 1, 2019 for several provisions of the rule, including the new minimum capital ratio requirements and the capital conservation buffer.

In October 2012, the FRB issued rules requiring companies with total consolidated assets of more than $10 billion to conduct annual company-run stress tests pursuant to the Dodd-Frank Act (DFAST). In July 2013, the FRB issued supervisory guidance for implementing the DFAST rules for banking organizations with total consolidated assets of more than $10 billion but less than $50 billion. The DFAST guidelines and rules build upon the May 2012 stress testing guidance issued by the FRB, Supervisory Guidance on Stress Testing for Banking Organizations with More Than $10 Billion in Total Consolidated Assets (SR Letter 12-7). The Corporation is subject to these supervisory rules and guidelines and conducted its annual company-run stress tests with results reported to the FRB by March 31, 2015 and made available to the public by June 30, 2015. Also, FNBPA is subject to stress testing rules and guidelines under the Office of the Comptroller of the Currency (OCC). The OCC has advised that it will consult closely with the FRB to provide common stress scenarios which can be utilized at both the depository institution and bank holding company levels.

59

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

The information called for by this item is provided under the caption Market Risk in Part I, Item 2—Management’s Discussion and Analysis of Financial Condition and Results of Operations and is incorporated herein by reference. There are no material changes in the information provided under Part II, Item 7A, “Quantitative and Qualitative Disclosures About Market Risk” included in the Corporation’s 2014 Annual Report on Form 10-K as filed with the SEC on February 27, 2015.

ITEM 4. CONTROLS AND PROCEDURES

EVALUATION OF DISCLOSURE CONTROLS AND PROCEDURES. The Corporation’s management, with the participation of the Corporation’s principal executive and financial officers, evaluated the Corporation’s disclosure controls and procedures (as defined in Rules 13a–15(e) and 15d–15(e) under the Securities Exchange Act of 1934, as amended) as of the end of the period covered by this Quarterly Report on Form 10-Q. Based on this evaluation, the Corporation’s management, including the Chief Executive Officer (CEO) and the Chief Financial Officer (CFO), concluded that, as of the end of the period covered by this quarterly report, the Corporation’s disclosure controls and procedures were effective as of such date at the reasonable assurance level as discussed below to ensure that information required to be disclosed by the Corporation in the reports it files under the Securities Exchange Act of 1934, as amended, is recorded, processed, summarized and reported within the time periods specified in the rules and forms of the SEC and that such information is accumulated and communicated to the Corporation’s management, including its principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure.

LIMITATIONS ON THE EFFECTIVENESS OF CONTROLS. The Corporation’s management, including the CEO and the CFO, does not expect that the Corporation’s disclosure controls and internal controls will prevent all errors and all fraud. A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within the Corporation have been detected. These inherent limitations include the realities that judgments in decision-making can be faulty, and that breakdowns can occur because of simple error or mistake. In addition, controls can be circumvented by the individual acts of some persons, by collusion of two or more people or by management override of the controls.

CHANGES IN INTERNAL CONTROLS. The CEO and the CFO have evaluated the changes to the Corporation’s internal controls over financial reporting that occurred during the Corporation’s fiscal quarter ended March 31, 2015, as required by paragraph (d) of Rules 13a–15 and 15d–15 under the Securities Exchange Act of 1934, as amended, and have concluded that there were no such changes that materially affected, or are reasonably likely to materially affect, the Corporation’s internal controls over financial reporting.

60

PART II—OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

The Corporation and its subsidiaries are involved in various pending legal proceedings in which claims for monetary damages and other relief are asserted. These actions include claims brought against the Corporation and its subsidiaries where the Corporation or a subsidiary acted as one or more of the following: a depository bank, lender, underwriter, fiduciary, financial advisor, broker, agent, acquiror or was engaged in other business activities. Although the ultimate outcome for any asserted claim cannot be predicted with certainty, the Corporation believes that it and its subsidiaries have valid defenses for all asserted claims. Reserves are established for legal claims when losses associated with the claims are judged to be probable and the amount of the loss can be reasonably estimated.

Based on information currently available, advice of counsel, available insurance coverage and established reserves, the Corporation does not anticipate, at the present time, that the aggregate liability, if any, arising out of such legal proceedings will have a material adverse effect on the Corporation’s consolidated financial position. However, the Corporation cannot determine whether or not any claims asserted against it will have a material adverse effect on its consolidated results of operations in any future reporting period.

ITEM 1A. RISK FACTORS

There are no material changes from any of the risk factors previously disclosed in the Corporation’s 2014 Annual Report on Form 10-K as filed with the SEC on February 27, 2015.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

NONE

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

NONE

ITEM 4. MINE SAFETY DISCLOSURES

Not Applicable.

ITEM 5. OTHER INFORMATION

NONE

ITEM 6. EXHIBITS

Exhibit Index

31.1 Certification of Chief Executive Officer Sarbanes-Oxley Act Section 302. (filed herewith).

31.2 Certification of Chief Financial Officer Sarbanes-Oxley Act Section 302. (filed herewith).

32.1 Certification of Chief Executive Officer Sarbanes-Oxley Act Section 906. (furnished herewith).

32.2 Certification of Chief Financial Officer Sarbanes-Oxley Act Section 906. (furnished herewith).

101 The following materials from F.N.B. Corporation’s Quarterly Report on Form 10-Q for the period ended March 31, 2015, formatted in XBRL: (i) the Consolidated Balance Sheets, (ii) the Consolidated Statements of Comprehensive Income, (iii) the Consolidated Statements of Stockholders’ Equity, (iv) the Consolidated Statements of Cash Flows and (v) the Notes to Consolidated Financial Statements. (filed herewith).

61

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.

	F.N.B. Corporation
Dated: May 8, 2015	/s/ Vincent J. Delie, Jr.
	Vincent J. Delie, Jr.
	President and Chief Executive Officer
	(Principal Executive Officer)
Dated: May 8, 2015	/s/ Vincent J. Calabrese, Jr.
	Vincent J. Calabrese, Jr.
	Chief Financial Officer
	(Principal Financial Officer)
Dated: May 8, 2015	/s/ Timothy G. Rubritz
	Timothy G. Rubritz
	Corporate Controller
	(Principal Accounting Officer)

62

EX-31.1

EXHIBIT 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

SARBANES-OXLEY ACT SECTION 302

I, Vincent J. Delie, Jr., certify that:

1. I have reviewed this quarterly report on Form 10-Q for the quarter ended March 31, 2015 of F.N.B. 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 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 controls over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer 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: May 8, 2015	/s/ Vincent J. Delie, Jr.
	Vincent J. Delie, Jr. President and Chief Executive Officer

EX-31.2

EXHIBIT 31.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

SARBANES-OXLEY ACT SECTION 302

I, Vincent J. Calabrese, Jr., certify that:

1. I have reviewed this quarterly report on Form 10-Q for the quarter ended March 31, 2015 of F.N.B. 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 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 controls over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer 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: May 8, 2015	/s/ Vincent J. Calabrese, Jr.
	Vincent J. Calabrese, Jr. Chief Financial Officer

EX-32.1

EXHIBIT 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

SARBANES-OXLEY ACT SECTION 906

Pursuant to Section 1350 of Title 18 of the United States Code, I, Vincent J. Delie, Jr., President and Chief Executive Officer of F.N.B. Corporation (the “Company”), hereby certify that, to the best of my knowledge:

1. The Company’s Form 10-Q Quarterly Report for the period ended March 31, 2015 (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.

Date: May 8, 2015	/s/ Vincent J. Delie, Jr.
	Vincent J. Delie, Jr. President and Chief Executive Officer

EX-32.2

EXHIBIT 32.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

SARBANES-OXLEY ACT SECTION 906

Pursuant to Section 1350 of Title 18 of the United States Code, I, Vincent J. Calabrese, Jr., Chief Financial Officer of F.N.B. Corporation (the “Company”), hereby certify that, to the best of my knowledge:

1. The Company’s Form 10-Q Quarterly Report for the period ended March 31, 2015 (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.

Date: May 8, 2015	/s/ Vincent J. Calabrese, Jr.
	Vincent J. Calabrese, Jr. Chief Financial Officer

XML

Cash Flow Information (Tables)

3 Months Ended

Mar. 31, 2015

Supplemental Cash Flow Elements [Abstract]

Summary of Supplemental Cash Flow Information

Following is a summary of supplemental cash flow information:

Three Months Ended March 31	2015		2014
Interest paid on deposits and other borrowings	$	11,626	$	10,576
Income taxes paid		—		—
Transfers of loans to other real estate owned		1,965		4,849
Financing of other real estate owned sold		166		—

XML

Loans and Leases - Summary of Outstanding Principal Balance and Carrying Amount of Acquired Loans (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount	$ 11,404,099	$ 11,247,038
Accounted for under ASC 310-30 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	1,513,616	1,597,558
Carrying amount	1,259,995	1,344,171
Accounted for under ASC 310-20 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	232,524	242,488
Carrying amount	220,921	228,748
Acquired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	1,746,140	1,840,046
Carrying amount	$ 1,480,916	$ 1,572,919

XML

Securities - Amortized Cost and Fair Value of Securities, by Contractual Maturities (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Schedule Of Securities [Line Items]
Available for Sale, Due in one year or less, Amortized Cost	$ 4,985
Available for Sale, Due from one to five years, Amortized Cost	423,890
Available for Sale, Due from five to ten years, Amortized Cost	11,591
Available for Sale, Due after ten years, Amortized Cost	6,890
Available for Sale, with contractual maturities, Amortized Cost	447,356
Total securities available for sale, Amortized Cost	1,524,825	1,534,771
Available for Sale, Due in one year or less, Fair Value	5,069
Available for Sale, Due from one to five years, Fair Value	426,811
Available for Sale, Due from five to ten years, Fair Value	12,018
Available for Sale, Due after ten years, Fair Value	6,105
Available for Sale, with contractual maturities, Fair Value	450,003
Total available for sale Securities, Fair Value	1,537,080	1,534,065
Held to Maturity, Due in one year or less, Amortized Cost	1,282
Held to Maturity, Due from one to five years, Amortized Cost	138,269
Held to Maturity, Due from five to ten years, Amortized Cost	72,457
Held to Maturity, Due after ten years, Amortized Cost	99,912
Securities Held To Maturity, with contractual maturities, Amortized Cost	311,920
Held to Maturity, with contractual maturities, Amortized Cost	1,513,204	1,453,355
Held to Maturity, Due in one year or less, Fair Value	1,285
Held to Maturity, Due from one to five years, Fair Value	139,139
Held to Maturity, Due from five to ten years, Fair Value	74,672
Held to Maturity, Due after ten years, Fair Value	101,804
Securities Held To Maturity, with contractual maturities, Fair Value	316,900
Held to Maturity, with contractual maturities, Fair Value	1,536,449	1,468,258
Agency Mortgage-Backed Securities [Member]
Schedule Of Securities [Line Items]
Total securities available for sale, Amortized Cost	494,497	546,572
Total available for sale Securities, Fair Value	505,561
Held to Maturity, with contractual maturities, Amortized Cost	674,101	677,169
Held to Maturity, with contractual maturities, Fair Value	693,211	693,535
Agency Collateralized Mortgage Obligations [Member]
Schedule Of Securities [Line Items]
Total securities available for sale, Amortized Cost	573,738	580,601
Total available for sale Securities, Fair Value	572,017
Held to Maturity, with contractual maturities, Amortized Cost	505,859	501,965
Held to Maturity, with contractual maturities, Fair Value	504,608	496,494
Non-Agency Collateralized Mortgage Obligations [Member]
Schedule Of Securities [Line Items]
Total securities available for sale, Amortized Cost	1,359	1,414
Total available for sale Securities, Fair Value	1,364
Held to Maturity, with contractual maturities, Amortized Cost	3,840	4,285
Held to Maturity, with contractual maturities, Fair Value	3,861	4,313
Commercial Mortgage-Backed Securities [Member]
Schedule Of Securities [Line Items]
Total securities available for sale, Amortized Cost	6,844	7,891
Total available for sale Securities, Fair Value	6,843
Held to Maturity, with contractual maturities, Amortized Cost	17,484	17,560
Held to Maturity, with contractual maturities, Fair Value	17,869	17,739
Equity Securities [Member]
Schedule Of Securities [Line Items]
Total securities available for sale, Amortized Cost	1,031	1,031
Total available for sale Securities, Fair Value	$ 1,292

XML

Borrowings - Junior Subordinated Debt Trusts (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Subordinated Borrowing [Line Items]
Junior subordinated debt	$ 58,259	$ 58,246
Trust Preferred Securities Subject to Mandatory Redemption [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	57,500
Common Stock Subject to Mandatory Redemption [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	1,779
F.N.B. Statutory Trust II [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	22,165
Stated Maturity Date	Jun. 15, 2036
Interest Rate	1.92%
Description of variable rate	Variable; LIBOR + 165 basis points (bps)
Basis points	1.65%
F.N.B. Statutory Trust II [Member] | Trust Preferred Securities Subject to Mandatory Redemption [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	21,500
F.N.B. Statutory Trust II [Member] | Common Stock Subject to Mandatory Redemption [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	665
Omega Financial Capital Trust I [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	36,094
Stated Maturity Date	Oct. 18, 2034
Interest Rate	2.44%
Description of variable rate	Variable; LIBOR + 219 bps
Basis points	2.19%
Omega Financial Capital Trust I [Member] | Trust Preferred Securities Subject to Mandatory Redemption [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	36,000
Omega Financial Capital Trust I [Member] | Common Stock Subject to Mandatory Redemption [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	$ 1,114

XML

Loans and Leases - Summary of Change in Accretable Yield of Acquired Loans (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period [Abstract]
Balance at beginning of period	$ 331,899	$ 305,646
Reduction due to unexpected early payoffs	(11,909)	(12,694)
Reclass from non-accretable difference	7,676	768
Disposals/transfers	(118)	(944)
Accretion	(16,264)	(15,913)
Balance at end of period	$ 311,284	$ 276,863

XML

Commitments, Credit Risk and Contingencies - Summary of Off-Balance Sheet Credit Risk Information (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Commitments to Extend Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Extended credit and standby letters of credit	$ 3,969,614	$ 3,665,481
Standby Letters of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Extended credit and standby letters of credit	$ 109,355	$ 121,186

XML

Securities - Gross Gains and Gross Losses Realized on Sales of Securities (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Gross gains		$ 18,009
Gross losses	(9)	(8,548)
Total	$ (9)	$ 9,461

XML

Derivative And Hedging Activities (Tables)

3 Months Ended

Mar. 31, 2015

Schedule of Notional Amounts and Gross Fair Values of Derivative Assets and Derivative Liabilities

The following table presents notional amounts and gross fair values of all derivative assets and derivative liabilities held by the Corporation:

	March 31, 2015						December 31, 2014
	Notional		Fair Value				Notional		Fair Value
	Amount		Asset		Liability		Amount		Asset		Liability
Gross Derivatives
Subject to master netting arrangements:
Interest rate contracts – designated	$	200,000	$	3,937	$	669	$	200,000	$	2,109	$	2,330
Interest rate swaps – not designated		1,020,957		6		53,718		972,002		140		43,655
Equity contracts – not designated		1,210		39		—		1,210		47		—
Total subject to master netting arrangements		1,222,167		3,982		54,387		1,173,212		2,296		45,985
Not subject to master netting arrangements:
Interest rate swaps – not designated		1,020,957		53,569		5		972,002		43,602		128
Credit risk contracts – not designated		76,416		—		—		68,632		—		—
Equity contracts – not designated		1,210		—		39		1,210		—		47
Total not subject to master netting arrangements		1,098,583		53,569		44		1,041,844		43,602		175
	$	2,320,750	$	57,551	$	54,431	$	2,215,056	$	45,898	$	46,160

Derivative Assets

	Gross Amount		Gross Amounts Offset in the Balance Sheet		Net Amount Presented in the Balance Sheet
March 31, 2015
Derivative Assets
Subject to master netting arrangements:
Interest rate contracts
Designated	$	3,937		—	$	3,937
Not designated		6		—		6
Equity contracts – not designated		39		—		39
Not subject to master netting arrangements:
Interest rate contracts – not designated		53,569		—		53,569
	$	57,551		—	$	57,551

December 31, 2014
Derivative Assets
Subject to master netting arrangements:
Interest rate contracts
Designated	$	2,109	—	$	2,109
Not designated		140	—		140
Equity contracts – not designated		47	—		47
Not subject to master netting arrangements:
Interest rate contracts – not designated		43,602	—		43,602
	$	45,898	—	$	45,898

Derivative Liabilities

	Gross Amount		Gross Amounts Offset in the Balance Sheet		Net Amount Presented in the Balance Sheet
March 31, 2015
Derivative Liabilities
Subject to master netting arrangements:
Interest rate contracts
Designated	$	669		—	$	669
Not designated		53,718		—		53,718
Not subject to master netting arrangements:
Interest rate contracts – not designated		5		—		5
Equity contracts – not designated		39		—		39
	$	54,431		—	$	54,431
December 31, 2014
Derivative Liabilities
Subject to master netting arrangements:
Interest rate contracts
Designated	$	2,330		—	$	2,330
Not designated		43,655		—		43,655
Not subject to master netting arrangements:
Interest rate contracts – not designated		128		—		128
Equity contracts – not designated		47		—		47
	$	46,160		—	$	46,160

Effect of Corporation's Derivative Financial Instruments on Income Statement

The following table presents the effect of the Corporation’s derivative financial instruments on the income statement:

	Income		Three Months Ended
	Statement		March 31,
	Location		2015			2014
Interest Rate Products		Other income	$	(107	)	$	(14	)

Collateral Held By Counterparty [Member]

Derivative Assets

			Amount Not Offset in the Balance Sheet
	Net Amount Presented in the Balance Sheet		Financial Instruments		Cash Collateral		Net Amount
March 31, 2015
Derivative Assets
Interest rate contracts:
Designated	$	3,937	$	1,902	$	2,035		—
Not designated		6		6		—		—
Equity contracts – not designated		39		39		—		—
	$	3,982	$	1,947	$	2,035		—
December 31, 2014
Derivative Assets
Interest rate contracts:
Designated	$	2,109	$	810	$	1,299		—
Not designated		140		138		2		—
Equity contracts – not designated		47		47		—		—
	$	2,296	$	995	$	1,301		—

Derivative Liabilities

			Amount Not Offset in the Balance Sheet
	Net Amount Presented in the Balance Sheet		Financial Instruments		Cash Collateral		Net Amount
March 31, 2015
Derivative Liabilities
Interest rate contracts:
Designated	$	669	$	669	$	—	$	—
Not designated		53,718		30,626		21,346		1,746
	$	54,387	$	31,295	$	21,346	$	1,746
December 31, 2014
Derivative Liabilities
Interest rate contracts:
Designated	$	2,330	$	2,330	$	—	$	—
Not designated		43,655		28,646		13,243		1,766
	$	45,985	$	30,976	$	13,243	$	1,766

XML

Commitments, Credit Risk and Contingencies - Additional Information (Detail)	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Percentage of Commitments to extend credit dependent upon the financial condition of the customers	68.20%

XML

Derivative and Hedging Activities - Offsetting of Derivative Assets (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Gross Amount	$ 57,551	$ 45,898
Gross Amounts Offset in the Balance Sheet, Derivative Assets	0	0
Net Amount Presented in the Balance Sheet	57,551	45,898
Subject to Master Netting Arrangement [Member]
Derivatives, Fair Value [Line Items]
Net Amount Presented in the Balance Sheet	3,982	2,296
Subject to Master Netting Arrangement [Member] | Interest Rate Contracts [Member]
Derivatives, Fair Value [Line Items]
Gross Amount	3,937	2,109
Gross Amounts Offset in the Balance Sheet, Derivative Assets	0	0
Net Amount Presented in the Balance Sheet	3,937	2,109
Subject to Master Netting Arrangement [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Gross Amount	6	140
Gross Amounts Offset in the Balance Sheet, Derivative Assets	0	0
Net Amount Presented in the Balance Sheet	6	140
Subject to Master Netting Arrangement [Member] | Equity Contracts [Member]
Derivatives, Fair Value [Line Items]
Gross Amount	39	47
Gross Amounts Offset in the Balance Sheet, Derivative Assets	0	0
Net Amount Presented in the Balance Sheet	39	47
Not Subject to Master Netting Arrangement [Member]
Derivatives, Fair Value [Line Items]
Net Amount Presented in the Balance Sheet	53,569	43,602
Not Subject to Master Netting Arrangement [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Gross Amount	53,569	43,602
Gross Amounts Offset in the Balance Sheet, Derivative Assets	0	0
Net Amount Presented in the Balance Sheet	$ 53,569	$ 43,602

XML

Earnings Per Common Share - Computation of Basic and Diluted Earnings Per Common Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share [Abstract]
Net income	$ 40,343	$ 34,524
Less: Preferred stock dividends	2,010	2,322
Net income available to common stockholders	$ 38,333	$ 32,202
Basic weighted average common shares outstanding	174,152,283	162,186,395
Net effect of dilutive stock options, warrants, restricted stock and convertible debt	1,673,693	1,780,851
Diluted weighted average common shares outstanding	175,825,976	163,967,246
Basic	$ 0.22	$ 0.20
Diluted	$ 0.22	$ 0.20

XML

Loans and Leases - Age Analysis of Past Due Loans, by Class (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	$ 11,404,099	$ 11,247,038
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	3,817,189	3,815,708
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	2,397,731	2,318,015
Commercial Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	180,207	177,824
Total Commercial Loans and Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	6,395,127	6,311,547
Direct Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,653,621	1,644,621
Residential Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,299,097	1,263,053
Indirect Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	905,204	875,551
Consumer Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,108,418	1,110,976
Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	42,632	41,290
Originated Loans and Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	34,042	41,275
> 90 Days Past Due and Still Accruing	6,543	9,248
Non-Accrual	45,029	45,113
Total Past Due	85,614	95,636
Current	9,830,317	9,570,509
Total Loans	9,915,931	9,666,145
Originated Loans and Leases [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	6,655	9,601
> 90 Days Past Due and Still Accruing	130	313
Non-Accrual	23,653	24,132
Total Past Due	30,438	34,046
Current	3,051,947	2,997,764
Total Loans	3,082,385	3,031,810
Originated Loans and Leases [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	2,939	2,446
> 90 Days Past Due and Still Accruing	3	3
Non-Accrual	8,846	8,310
Total Past Due	11,788	10,759
Current	2,269,287	2,187,034
Total Loans	2,281,075	2,197,793
Originated Loans and Leases [Member] | Commercial Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	1,097	961
> 90 Days Past Due and Still Accruing		43
Non-Accrual	732	722
Total Past Due	1,829	1,726
Current	178,378	176,098
Total Loans	180,207	177,824
Originated Loans and Leases [Member] | Total Commercial Loans and Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	10,691	13,008
> 90 Days Past Due and Still Accruing	133	359
Non-Accrual	33,231	33,164
Total Past Due	44,055	46,531
Current	5,499,612	5,360,896
Total Loans	5,543,667	5,407,427
Originated Loans and Leases [Member] | Direct Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	8,748	9,333
> 90 Days Past Due and Still Accruing	3,575	3,617
Non-Accrual	6,464	7,117
Total Past Due	18,787	20,067
Current	1,576,059	1,559,703
Total Loans	1,594,846	1,579,770
Originated Loans and Leases [Member] | Residential Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	7,040	8,709
> 90 Days Past Due and Still Accruing	1,731	3,891
Non-Accrual	3,625	2,964
Total Past Due	12,396	15,564
Current	865,041	802,022
Total Loans	877,437	817,586
Originated Loans and Leases [Member] | Indirect Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	5,015	7,804
> 90 Days Past Due and Still Accruing	409	684
Non-Accrual	1,111	1,149
Total Past Due	6,535	9,637
Current	897,245	864,008
Total Loans	903,780	873,645
Originated Loans and Leases [Member] | Consumer Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	2,501	2,408
> 90 Days Past Due and Still Accruing	656	562
Non-Accrual	598	719
Total Past Due	3,755	3,689
Current	949,814	942,738
Total Loans	953,569	946,427
Originated Loans and Leases [Member] | Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	47	13
> 90 Days Past Due and Still Accruing	39	135
Total Past Due	86	148
Current	42,546	41,142
Total Loans	42,632	41,290
Acquired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	19,854	24,678
> 90 Days Past Due and Still Accruing	35,906	38,024
Total Past Due	55,760	62,702
Current	1,523,538	1,612,959
Discount	(91,130)	(94,768)
Total Loans	1,488,168	1,580,893
Acquired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	8,813	12,076
> 90 Days Past Due and Still Accruing	12,445	12,368
Total Past Due	21,258	24,444
Current	753,073	799,991
Discount	(39,527)	(40,537)
Total Loans	734,804	783,898
Acquired Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	1,023	687
> 90 Days Past Due and Still Accruing	1,651	1,968
Total Past Due	2,674	2,655
Current	122,604	127,535
Discount	(8,622)	(9,968)
Total Loans	116,656	120,222
Acquired Loans [Member] | Total Commercial Loans and Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	9,836	12,763
> 90 Days Past Due and Still Accruing	14,096	14,336
Total Past Due	23,932	27,099
Current	875,677	927,526
Discount	(48,149)	(50,505)
Total Loans	851,460	904,120
Acquired Loans [Member] | Direct Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	1,199	2,670
> 90 Days Past Due and Still Accruing	1,112	1,443
Total Past Due	2,311	4,113
Current	55,476	59,532
Discount	988	1,206
Total Loans	58,775	64,851
Acquired Loans [Member] | Residential Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	7,695	8,159
> 90 Days Past Due and Still Accruing	18,535	19,936
Total Past Due	26,230	28,095
Current	434,061	456,810
Discount	(38,631)	(39,438)
Total Loans	421,660	445,467
Acquired Loans [Member] | Indirect Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	9	38
> 90 Days Past Due and Still Accruing	17	30
Total Past Due	26	68
Current	1,648	2,179
Discount	(250)	(341)
Total Loans	1,424	1,906
Acquired Loans [Member] | Consumer Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	1,115	1,048
> 90 Days Past Due and Still Accruing	2,146	2,279
Total Past Due	3,261	3,327
Current	156,676	166,912
Discount	(5,088)	(5,690)
Total Loans	$ 154,849	$ 164,549

XML

Derivative and Hedging Activities - Derivative Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	$ 54,431	$ 46,160
Subject to Master Netting Arrangement [Member]
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	54,387	45,985
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities	31,295	30,976
Gross Amount Not Offset in the Balance Sheet Cash Collateral Pledged, Derivative Liabilities	21,346	13,243
Net Amount, Derivative Liabilities	1,746	1,766
Subject to Master Netting Arrangement [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	669	2,330
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities	699	2,330
Subject to Master Netting Arrangement [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	53,718	43,655
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities	30,626	28,646
Gross Amount Not Offset in the Balance Sheet Cash Collateral Pledged, Derivative Liabilities	21,346	13,243
Net Amount, Derivative Liabilities	$ 1,746	$ 1,766

XML

Comprehensive Income - Components of Comprehensive Income, Net of Related Tax (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Components Of Comprehensive Income [Abstract]
Net income	$ 40,343	$ 34,524
Securities available for sale, Unrealized gains arising during the period, net of tax expense of $4,523 and $9,016	8,400	16,742
Securities available for sale, Reclassification adjustment for losses (gains) included in net income, net of tax (benefit) expense of $(3) and $ 3,311	6	(6,150)
Unrealized gains on derivative instruments arising during the period, net of tax expense of $1,504 and $1,402	2,793	2,603
Reclassification adjustment on derivative instruments for gains included in net income, net of tax expense of $283 and $285	(526)	(529)
Unrealized gains on pension and postretirement benefit obligations arising during the period, net of tax expense of $189 and $117	350	217
Other comprehensive income	11,023	12,883
Comprehensive income	$ 51,366	$ 47,407

XML

Stock Incentive Plans - Summary of Information Concerning Restricted Stock Awards (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Awards, Unvested awards outstanding at beginning of period	1,354,093	1,729,033
Awards, Net adjustment due to performance	(46,956)	(19,002)
Awards,Vested	(458,450)	(667,956)
Awards,Forfeited	(2,357)	(430)
Awards,Dividend reinvestment	7,656	9,612
Awards,Unvested awards outstanding at end of period	853,986	1,051,257
Weighted Average Grant Price, Unvested awards outstanding at beginning of period	$ 11.86	$ 10.23
Weighted Average Grant Price, Net adjustment due to performance	$ 10.25	$ 8.48
Weighted Average Grant Price,Vested	$ 10.60	$ 9.01
Weighted Average Grant Price,Forfeited	$ 17.93	$ 10.69
Weighted Average Grant Price, Dividend reinvestment	$ 14.24	$ 13.01
Weighted Average Grant Price, Unvested awards outstanding at end of period	$ 12.63	$ 11.06

XML

Comprehensive Income - Components of Comprehensive Income, Net of Related Tax (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Components Of Comprehensive Income [Abstract]
Securities available for sale, Unrealized gains arising during the period, tax expense	$ 4,523	$ 9,016
Securities available for sale, Reclassification adjustment for losses (gains) included in net income, tax (benefit) expense	(3)	3,311
Unrealized gains on derivative instruments arising during the period, tax expense	1,504	1,402
Reclassification adjustment on derivative instruments for gains included in net income, tax expense	283	285
Unrealized gains on pension and postretirement benefit obligations arising during the period, tax expense	$ 189	$ 117

XML

Derivative and Hedging Activities - Effect of Corporation's Derivative Financial Instruments on Income Statement (Detail) (Interest Rate Contracts [Member], Other Income [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Interest Rate Contracts [Member] | Other Income [Member]
Derivative [Line Items]
Interest Rate Products	$ (107)	$ (14)

XML

Derivative and Hedging Activities - Schedule of Notional Amounts and Gross Fair Values of Derivative Assets and Derivative Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Notional amount	$ 2,320,750	$ 2,215,056
Fair value,asset	57,551	45,898
Liability	54,431	46,160
Interest Rate Contracts [Member]
Derivatives, Fair Value [Line Items]
Notional amount	200,000	200,000
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Notional amount	1,020,957	972,002
Subject to Master Netting Arrangement [Member]
Derivatives, Fair Value [Line Items]
Notional amount	1,222,167	1,173,212
Fair value,asset	3,982	2,296
Liability	54,387	45,985
Subject to Master Netting Arrangement [Member] | Interest Rate Contracts [Member]
Derivatives, Fair Value [Line Items]
Notional amount	200,000	200,000
Fair value,asset	3,937	2,109
Liability	669	2,330
Subject to Master Netting Arrangement [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Notional amount	1,020,957	972,002
Fair value,asset	6	140
Liability	53,718	43,655
Subject to Master Netting Arrangement [Member] | Credit Risk Contract [Member]
Derivatives, Fair Value [Line Items]
Notional amount	1,210	1,210
Fair value,asset	39	47
Subject to Master Netting Arrangement [Member] | Equity Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value,asset	39	47
Not Subject to Master Netting Arrangement [Member]
Derivatives, Fair Value [Line Items]
Notional amount	1,098,583	1,041,844
Fair value,asset	53,569	43,602
Liability	44	175
Not Subject to Master Netting Arrangement [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Notional amount	1,020,957	972,002
Fair value,asset	53,569	43,602
Liability	5	128
Not Subject to Master Netting Arrangement [Member] | Credit Risk Contract [Member]
Derivatives, Fair Value [Line Items]
Notional amount	76,416	68,632
Not Subject to Master Netting Arrangement [Member] | Equity Contracts [Member]
Derivatives, Fair Value [Line Items]
Notional amount	1,210	1,210
Liability	$ 39	$ 47

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Cash Flow Information

3 Months Ended

Mar. 31, 2015

Supplemental Cash Flow Elements [Abstract]

Cash Flow Information

CASH FLOW INFORMATION

Following is a summary of supplemental cash flow information:

Three Months Ended March 31	2015		2014
Interest paid on deposits and other borrowings	$	11,626	$	10,576
Income taxes paid		—		—
Transfers of loans to other real estate owned		1,965		4,849
Financing of other real estate owned sold		166		—

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Securities - Summary of Cumulative Credit-Related OTTI Charges (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Beginning balance	$ 27	$ 17,182
Loss where impairment was not previously recognized	0	0
Additional loss where impairment was previously recognized	0	0
Reduction due to credit impaired securities sold		(17,155)
Ending balance	27	27
Collateralized Debt Obligations [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Beginning balance		17,155
Loss where impairment was not previously recognized	0	0
Additional loss where impairment was previously recognized	0	0
Reduction due to credit impaired securities sold		(17,155)
Equity Securities [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Beginning balance	27	27
Loss where impairment was not previously recognized	0	0
Additional loss where impairment was previously recognized	0	0
Ending balance	$ 27	$ 27

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Business - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2015 Office Location State
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of states, Company operating financial services	6
Number of metropolitan areas, Company operating financial services	3
Number of consumer finance offices	73
Number of banking offices	287

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Derivative and Hedging Activities - Derivative Assets (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	$ 57,551	$ 45,898
Subject to Master Netting Arrangement [Member]
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	3,982	2,296
Gross Amounts Not Offset in the Balance Sheet Financial Instruments, Derivative Assets	1,947	995
Gross Amounts Not Offset in the Balance Sheet Cash Collateral Received, Derivative Assets	2,035	1,301
Net Amount, Derivative Assets	0	0
Subject to Master Netting Arrangement [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	3,937	2,109
Gross Amounts Not Offset in the Balance Sheet Financial Instruments, Derivative Assets	1,902	810
Gross Amounts Not Offset in the Balance Sheet Cash Collateral Received, Derivative Assets	2,035	1,299
Net Amount, Derivative Assets	0	0
Subject to Master Netting Arrangement [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	6	140
Gross Amounts Not Offset in the Balance Sheet Financial Instruments, Derivative Assets	6	138
Gross Amounts Not Offset in the Balance Sheet Cash Collateral Received, Derivative Assets		2
Net Amount, Derivative Assets	0	0
Subject to Master Netting Arrangement [Member] | Equity Contracts [Member]
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	39	47
Gross Amounts Not Offset in the Balance Sheet Financial Instruments, Derivative Assets	39	47
Net Amount, Derivative Assets	$ 0	$ 0

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Fair Value Measurements - Additional Information about Assets Measured at Fair Value on Non-Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 2,181
Other real estate owned	2,410
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	883	1,705
Other real estate owned	2,410	8,060
Level 2 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	190	177
Other real estate owned	977	5,695
Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	693	1,528
Other real estate owned	$ 1,433	$ 2,365

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Comprehensive Income (Tables)

3 Months Ended

Mar. 31, 2015

Equity [Abstract]

Components of Comprehensive Income, Net of Related Tax

The components of comprehensive income, net of related tax, are as follows:

	Three Months Ended
	March 31,
	2015			2014
Net income	$	40,343		$	34,524
Other comprehensive income:
Securities available for sale:
Unrealized gains arising during the period, net of tax expense of $4,523 and $9,016		8,400			16,742
Reclassification adjustment for losses (gains) included in net income, net of tax (benefit) expense of $(3) and $3,311		6			(6,150	)
Derivative instruments:
Unrealized gains arising during the period, net of tax expense of $1,504 and $1,402		2,793			2,603
Reclassification adjustment for gains included in net income, net of tax expense of $283 and $285		(526	)		(529	)
Pension and postretirement benefit obligations:
Unrealized gains arising during the period, net of tax expense of $189 and $117		350			217
Other comprehensive income		11,023			12,883
Comprehensive income	$	51,366		$	47,407

Changes in AOCI, Net of Tax, by Component

The following table presents changes in AOCI, net of tax, by component:

	Unrealized Net Gains (Losses) on Securities Available for Sale			Unrealized Net Gains (Losses) on Derivative Instruments			Unrecognized Pension and Postretirement Obligations			Total
Three Months Ended March 31, 2015
Balance at beginning of period	$	(440	)	$	(143	)	$	(45,420	)	$	(46,003	)
Other comprehensive income before reclassifications		8,400			2,793			350			11,543
Amounts reclassified from AOCI		6			(526	)		—			(520	)
Net current period other comprehensive income		8,406			2,267			350			11,023
Balance at end of period	$	7,966		$	2,124		$	(45,070	)	$	(34,980	)

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Loans and Leases - Summary of Loans and Leases, Net of Unearned Income (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	$ 11,404,099	$ 11,247,038
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	3,817,189	3,815,708
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	2,397,731	2,318,015
Commercial Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	180,207	177,824
Total Commercial Loans and Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	6,395,127	6,311,547
Direct Installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	1,653,621	1,644,621
Residential Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	1,299,097	1,263,053
Indirect Installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	905,204	875,551
Consumer Lines of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	1,108,418	1,110,976
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	42,632	41,290
Originated Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	9,915,931	9,666,145
Originated Loans [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	3,082,385	3,031,810
Originated Loans [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	2,281,075	2,197,793
Originated Loans [Member] | Commercial Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	180,207	177,824
Originated Loans [Member] | Total Commercial Loans and Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	5,543,667	5,407,427
Originated Loans [Member] | Direct Installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	1,594,846	1,579,770
Originated Loans [Member] | Residential Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	877,437	817,586
Originated Loans [Member] | Indirect Installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	903,780	873,645
Originated Loans [Member] | Consumer Lines of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	953,569	946,427
Originated Loans [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	42,632	41,290
Acquired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	1,488,168	1,580,893
Acquired Loans [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	734,804	783,898
Acquired Loans [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	116,656	120,222
Acquired Loans [Member] | Total Commercial Loans and Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	851,460	904,120
Acquired Loans [Member] | Direct Installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	58,775	64,851
Acquired Loans [Member] | Residential Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	421,660	445,467
Acquired Loans [Member] | Indirect Installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	1,424	1,906
Acquired Loans [Member] | Consumer Lines of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	$ 154,849	$ 164,549

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Borrowings - Summary of Short-Term Borrowings (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Debt Disclosure [Abstract]
Securities sold under repurchase agreements	$ 757,279	$ 882,696
Federal Home Loan Bank advances	500,000	820,000
Federal funds purchased	355,000	210,000
Subordinated notes	128,221	128,962
Short-term borrowings	$ 1,740,500	$ 2,041,658

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Loans and Leases - Summary of Payment Status of Total TDRs (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings ("TDRs")	$ 42,855	$ 41,152
Performing [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings ("TDRs")	12,793	9,441
Non-Performing [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings ("TDRs")	22,022	23,439
Non-Accrual [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings ("TDRs")	$ 8,040	$ 8,272

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Securities - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015 Security	Mar. 31, 2014 Securities	Dec. 31, 2014
Schedule Of Securities [Line Items]
Number of pooled issue securities		23
Net proceeds from sale of securities	$ 33,228	$ 85,877
Net securities (losses) gains	(9)	9,461
Securities pledged to secure public deposits, trust deposits and for other purposes, carrying value	1,315,565		1,036,380
Securities pledged as collateral for short-term borrowings, carrying value	807,261		892,647
Number of single-issuer securities	4
Estimated fair value of single-issue trust preferred securities	6,890
Amortized cost of single-issue trust preferred securities	6,105
Impairment losses on securities	0	0
Municipal bond portfolio, value	178,017
Municipal Debt Securities [Member] | Combined A Rating [Member] | Minimum [Member]
Schedule Of Securities [Line Items]
Percentage of portfolio	99.00%
Municipal Debt Securities [Member] | General Obligation Bonds [Member]
Schedule Of Securities [Line Items]
Percentage of portfolio	99.50%
Municipal Debt Securities [Member] | Pennsylvania, Ohio and Maryland [Member]
Schedule Of Securities [Line Items]
Percentage of portfolio	89.90%
Municipal Debt Securities [Member] | Capital Support Agreement [Member]
Schedule Of Securities [Line Items]
Percentage of portfolio	88.00%
Municipal Debt Securities [Member] | Weighted Average [Member]
Schedule Of Securities [Line Items]
Carrying amount per bond	1,203
Pooled TPS [Member]
Schedule Of Securities [Line Items]
Net proceeds from sale of securities		51,540
Net securities (losses) gains		13,766
Other Securities [Member]
Schedule Of Securities [Line Items]
Net securities (losses) gains		$ (4,305)

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Basis of Presentation

3 Months Ended

Mar. 31, 2015

Accounting Policies [Abstract]

Basis of Presentation

BASIS OF PRESENTATION

The Corporation’s accompanying consolidated financial statements and these notes to the financial statements include subsidiaries in which the Corporation has a controlling financial interest. The Corporation owns and operates FNBPA, First National Trust Company, First National Investment Services Company, LLC, F.N.B. Investment Advisors, Inc., First National Insurance Agency, LLC, Regency, Bank Capital Services, LLC and F.N.B. Capital Corporation, LLC, and includes results for each of these entities in the accompanying consolidated financial statements.

The accompanying consolidated financial statements include all adjustments that are necessary, in the opinion of management, to fairly reflect the Corporation’s financial position and results of operations in accordance with U.S. generally accepted accounting principles (GAAP). All significant intercompany balances and transactions have been eliminated. Certain prior period amounts have been reclassified to conform to the current period presentation. Events occurring subsequent to the date of the balance sheet have been evaluated for potential recognition or disclosure in the consolidated financial statements through the date of the filing of the consolidated financial statements with the Securities and Exchange Commission (SEC).

Certain information and note disclosures normally included in consolidated financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to the rules and regulations of the SEC. The interim operating results are not necessarily indicative of operating results the Corporation expects for the full year. These interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Corporation’s Annual Report on Form 10-K filed with the SEC on February 27, 2015.

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Loans and Leases - Summary of Troubled Debt Restructurings by Class of Loans (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015 Contract	Mar. 31, 2014 Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts	168	151
Pre-Modification Outstanding Recorded Investment	$ 2,705	$ 2,471
Post-Modification Outstanding Recorded Investment	2,597	2,436
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	2	1
Pre-Modification Outstanding Recorded Investment	312	188
Post-Modification Outstanding Recorded Investment	196	188
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts		1
Pre-Modification Outstanding Recorded Investment		52
Post-Modification Outstanding Recorded Investment		50
Total Commercial Loans and Leases [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	2	2
Pre-Modification Outstanding Recorded Investment	312	240
Post-Modification Outstanding Recorded Investment	196	238
Direct Installment [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	131	126
Pre-Modification Outstanding Recorded Investment	1,526	1,678
Post-Modification Outstanding Recorded Investment	1,484	1,647
Residential Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	14	9
Pre-Modification Outstanding Recorded Investment	581	281
Post-Modification Outstanding Recorded Investment	631	280
Indirect Installment [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	5	7
Pre-Modification Outstanding Recorded Investment	16	17
Post-Modification Outstanding Recorded Investment	16	16
Consumer Lines of Credit [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	16	7
Pre-Modification Outstanding Recorded Investment	270	255
Post-Modification Outstanding Recorded Investment	$ 270	$ 255

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Mergers and Acquisitions - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended
	Sep. 19, 2014	Feb. 15, 2014	Mar. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Goodwill recorded as a result of merger			$ 829,726	$ 832,213
OBA Financial Services, Inc. (OBA) [Member]
Business Acquisition [Line Items]
Assets acquired as a result of merger	390,128
Loans acquired as a result of merger	291,393
Deposits acquired as a result of merger	295,922
Value of acquisition	85,554
Common shares issued	7,170,037
Common shares acquired	4,025,895
Goodwill recorded as a result of merger	20,139
Core deposit intangibles recorded as result of the acquisition	4,304
BCSB Bancorp, Inc. (BCSB) [Member]
Business Acquisition [Line Items]
Assets acquired as a result of merger		596,122
Loans acquired as a result of merger		304,932
Deposits acquired as a result of merger		532,197
Value of acquisition		80,547
Common shares issued		6,730,597
Common shares acquired		3,235,961
Goodwill recorded as a result of merger		42,451
Core deposit intangibles recorded as result of the acquisition		$ 6,591

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Securities (Tables)

3 Months Ended

Mar. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Schedule of Amortized Cost and Fair Value of Securities Available for Sale

The amortized cost and fair value of securities are as follows:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Securities Available for Sale
March 31, 2015
U.S. Treasury	$	29,637	$	300	$	—		$	29,937
U.S. government-sponsored entities		388,363		2,818		(521	)		390,660
Residential mortgage-backed securities:
Agency mortgage-backed securities		494,497		11,064		—			505,561
Agency collateralized mortgage obligations		573,738		3,646		(5,367	)		572,017
Non-agency collateralized mortgage obligations		1,359		5		—			1,364
Commercial mortgage-backed securities		6,844		—		(1	)		6,843
States of the U.S. and political subdivisions		12,713		476		(14	)		13,175
Other debt securities		16,643		373		(785	)		16,231
Total debt securities		1,523,794		18,682		(6,688	)		1,535,788
Equity securities		1,031		261		—			1,292
	$	1,524,825	$	18,943	$	(6,688	)	$	1,537,080
December 31, 2014
U.S. Treasury	$	29,604	$	78	$	—		$	29,682
U.S. government-sponsored entities		338,330		742		(1,939	)		337,133
Residential mortgage-backed securities:
Agency mortgage-backed securities		546,572		7,548		(35	)		554,085
Agency collateralized mortgage obligations		580,601		1,617		(9,047	)		573,171
Non-agency collateralized mortgage obligations		1,414		17		—			1,431
Commercial mortgage-backed securities		7,891		—		(11	)		7,880
States of the U.S. and political subdivisions		12,713		477		(32	)		13,158
Other debt securities		16,615		420		(857	)		16,178
Total debt securities		1,533,740		10,899		(11,921	)		1,532,718
Equity securities		1,031		316		—			1,347
	$	1,534,771	$	11,215	$	(11,921	)	$	1,534,065

Schedule of Amortized Cost and Fair Value of Securities Held to Maturity

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Securities Available for Sale
March 31, 2015
U.S. Treasury	$	29,637	$	300	$	—		$	29,937
U.S. government-sponsored entities		388,363		2,818		(521	)		390,660
Residential mortgage-backed securities:
Agency mortgage-backed securities		494,497		11,064		—			505,561
Agency collateralized mortgage obligations		573,738		3,646		(5,367	)		572,017
Non-agency collateralized mortgage obligations		1,359		5		—			1,364
Commercial mortgage-backed securities		6,844		—		(1	)		6,843
States of the U.S. and political subdivisions		12,713		476		(14	)		13,175
Other debt securities		16,643		373		(785	)		16,231
Total debt securities		1,523,794		18,682		(6,688	)		1,535,788
Equity securities		1,031		261		—			1,292
	$	1,524,825	$	18,943	$	(6,688	)	$	1,537,080
December 31, 2014
U.S. Treasury	$	29,604	$	78	$	—		$	29,682
U.S. government-sponsored entities		338,330		742		(1,939	)		337,133
Residential mortgage-backed securities:
Agency mortgage-backed securities		546,572		7,548		(35	)		554,085
Agency collateralized mortgage obligations		580,601		1,617		(9,047	)		573,171
Non-agency collateralized mortgage obligations		1,414		17		—			1,431
Commercial mortgage-backed securities		7,891		—		(11	)		7,880
States of the U.S. and political subdivisions		12,713		477		(32	)		13,158
Other debt securities		16,615		420		(857	)		16,178
Total debt securities		1,533,740		10,899		(11,921	)		1,532,718
Equity securities		1,031		316		—			1,347
	$	1,534,771	$	11,215	$	(11,921	)	$	1,534,065
Securities Held to Maturity
March 31, 2015
U.S. Treasury	$	500	$	182	$	—		$	682
U.S. government-sponsored entities		146,578		1,731		(149	)		148,160
Residential mortgage-backed securities:
Agency mortgage-backed securities		674,101		19,130		(20	)		693,211
Agency collateralized mortgage obligations		505,859		3,633		(4,884	)		504,608
Non-agency collateralized mortgage obligations		3,840		21		—			3,861
Commercial mortgage-backed securities		17,484		385		—			17,869
States of the U.S. and political subdivisions		164,842		3,372		(156	)		168,058
	$	1,513,204	$	28,454	$	(5,209	)	$	1,536,449
December 31, 2014
U.S. Treasury	$	502	$	168	$	—		$	670
U.S. government-sponsored entities		101,602		885		(524	)		101,963
Residential mortgage-backed securities:
Agency mortgage-backed securities		677,169		16,712		(346	)		693,535
Agency collateralized mortgage obligations		501,965		1,858		(7,329	)		496,494
Non-agency collateralized mortgage obligations		4,285		28		—			4,313
Commercial mortgage-backed securities		17,560		179		—			17,739
States of the U.S. and political subdivisions		150,272		3,315		(43	)		153,544
	$	1,453,355	$	23,145	$	(8,242	)	$	1,468,258

Gross Gains and Gross Losses Realized on Sales of Securities

Gross gains and gross losses were realized on securities as follows:

	Three Months Ended
	March 31,
	2015			2014
Gross gains	$	—		$	18,009
Gross losses		(9	)		(8,548	)
	$	(9	)	$	9,461

Amortized Cost and Fair Value of Securities, by Contractual Maturities

As of March 31, 2015, the amortized cost and fair value of securities, by contractual maturities, were as follows:

	Available for Sale				Held to Maturity
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due in one year or less	$	4,985	$	5,069	$	1,282	$	1,285
Due from one to five years		423,890		426,811		138,269		139,139
Due from five to ten years		11,591		12,018		72,457		74,672
Due after ten years		6,890		6,105		99,912		101,804
		447,356		450,003		311,920		316,900
Residential mortgage-backed securities:
Agency mortgage-backed securities		494,497		505,561		674,101		693,211
Agency collateralized mortgage obligations		573,738		572,017		505,859		504,608
Non-agency collateralized mortgage obligations		1,359		1,364		3,840		3,861
Commercial mortgage-backed securities		6,844		6,843		17,484		17,869
Equity securities		1,031		1,292		—		—
	$	1,524,825	$	1,537,080	$	1,513,204	$	1,536,449

Summaries of Fair Values and Unrealized Losses of Securities, Segregated by Length of Impairment

Following are summaries of the fair values and unrealized losses of securities, segregated by length of impairment:

	Less than 12 Months							12 Months or More							Total
	#		Fair Value		Unrealized Losses			#		Fair Value		Unrealized Losses			#		Fair Value		Unrealized Losses
Securities Available for Sale
March 31, 2015
U.S. government-sponsored entities		3	$	59,857	$	(142	)		5	$	55,612	$	(379	)		8	$	115,469	$	(521	)
Residential mortgage-backed securities:
Agency collateralized mortgage obligations		4		61,998		(199	)		17		242,124		(5,168	)		21		304,122		(5,367	)
Commercial mortgage-backed securities		1		6,843		(1	)		—		—		—			1		6,843		(1	)
States of the U.S. and political subdivisions		—		—		—			1		1,177		(14	)		1		1,177		(14	)
Other debt securities		—		—		—			4		6,105		(785	)		4		6,105		(785	)
		8	$	128,698	$	(342	)		27	$	305,018	$	(6,346	)		35	$	433,716	$	(6,688	)
December 31, 2014
U.S. government-sponsored entities		7	$	89,986	$	(275	)		7	$	99,326	$	(1,664	)		14	$	189,312	$	(1,939	)
Residential mortgage-backed securities:
Agency mortgage-backed securities		2		45,145		(35	)		—		—		—			2		45,145		(35	)
Agency collateralized mortgage obligations		9		166,908		(1,238	)		16		225,700		(7,809	)		25		392,608		(9,047	)
Commercial mortgage-backed securities		1		7,880		(11	)		—		—		—			1		7,880		(11	)
States of the U.S. and political subdivisions		—		—		—			1		1,159		(32	)		1		1,159		(32	)
Other debt securities		—		—		—			4		6,030		(857	)		4		6,030		(857	)
		19	$	309,919	$	(1,559	)		28	$	332,215	$	(10,362	)		47	$	642,134	$	(11,921	)
Securities Held to Maturity
March 31, 2015
U.S. government-sponsored entities		1	$	14,970	$	(30	)		1	$	14,881	$	(119	)		2	$	29,851	$	(149	)
Residential mortgage-backed securities:
Agency mortgage-backed securities		—		—		—			1		1,234		(20	)		1		1,234		(20	)
Agency collateralized mortgage obligations		4		69,926		(402	)		14		185,466		(4,482	)		18		255,392		(4,884	)
States of the U.S. and political subdivisions		8		13,418		(156	)		—		—		—			8		13,418		(156	)
		13	$	98,314	$	(588	)		16	$	201,581	$	(4,621	)		29	$	299,895	$	(5,209	)
December 31, 2014
U.S. government-sponsored entities		2	$	24,989	$	(40	)		2	$	29,516	$	(484	)		4	$	54,505	$	(524	)
Residential mortgage-backed securities:
Agency mortgage-backed securities		1		1,099		(1	)		4		45,042		(345	)		5		46,141		(346	)
Agency collateralized mortgage obligations		8		104,071		(630	)		14		189,642		(6,699	)		22		293,713		(7,329	)
States of the U.S. and political subdivisions		1		1,427		(4	)		4		5,453		(39	)		5		6,880		(43	)
		12	$	131,586	$	(675	)		24	$	269,653	$	(7,567	)		36	$	401,239	$	(8,242	)

Summary of Cumulative Credit-Related OTTI Charges

The following table presents a summary of the cumulative credit-related OTTI charges recognized as components of earnings for securities for which a portion of an OTTI is recognized in other comprehensive income:

	Collateralized Debt Obligations			Equities		Total
For the Three Months Ended March 31, 2015
Beginning balance		—		$	27	$	27
Loss where impairment was not previously recognized		—			—		—
Additional loss where impairment was previously recognized		—			—		—
Reduction due to credit impaired securities sold		—			—		—
Ending balance		—		$	27	$	27
For the Three Months Ended March 31, 2014
Beginning balance	$	17,155		$	27	$	17,182
Loss where impairment was not previously recognized		—			—		—
Additional loss where impairment was previously recognized		—			—		—
Reduction due to credit impaired securities sold		(17,155	)		—		(17,155	)
Ending balance	$	—		$	27	$	27

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New Accounting Standards (Policies)

3 Months Ended

Mar. 31, 2015

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

Cloud Computing Arrangements

Cloud Computing Arrangements

In April 2015, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2015-05, Intangibles-Goodwill and Other-Internal-Use Software. ASU 2015-05 provides guidance to help entities evaluate the accounting for fees paid by a customer in a cloud computing arrangement environment. The amendments in this Update provide a basis for evaluating whether a cloud computing arrangement includes a software license to internal-use software, and how to account for the software license element of the arrangement. This update supersedes the existing requirement to analogize to operating lease guidance in accounting for some software licenses. The requirements of ASU 2015-05 are effective for reporting periods beginning after December 15, 2015, with early adoption permitted. A reporting entity may apply ASU 2015-05 either prospectively or retrospectively. The Corporation is evaluating this new guidance and has not yet determined which approach it will adopt to apply the amendments in ASU 2015-05 or the impact that the adoption of this update will have on its financial statements.

Consolidation

Consolidation

In February 2015, the FASB issued ASU No. 2015-02, Consolidation. ASU 2015-02 changes the analysis that a reporting entity must perform to determine whether it should consolidate certain types of legal entities. This update modifies the evaluation of whether limited partnerships or similar legal entities are variable interest entities (VIEs) or voting interest entities, eliminates the presumption that a general partner should consolidate a limited partnership and affects the consolidation analysis of reporting entities that are involved with VIEs, particularly those that have fee arrangements and related party relationships. The requirements of ASU 2015-02 are effective for reporting periods beginning after December 15, 2015, with early adoption permitted. A reporting entity may apply ASU 2015-02 either retrospectively or by using a modified retrospective approach by recording a cumulative-effect adjustment to equity as of the beginning of the fiscal year of adoption. The adoption of this update is not expected to have a material effect on the financial statements, results of operations or liquidity of the Corporation.

Income Statement

Income Statement

In January 2015, the FASB issued ASU No. 2015-01, Income Statement – Extraordinary and Unusual Items. The FASB issued ASU 2015-01 as part of its Simplification Initiative to reduce complexity in accounting standards. ASU 2015-01 eliminates from GAAP the concept of extraordinary items. The requirements of ASU 2015-01 are effective for reporting periods beginning after December 15, 2015, with early adoption permitted. A reporting entity may apply ASU 2015-01 prospectively, or retrospectively to all prior periods presented in the financial statements. The adoption of this update will not have an effect on the financial statements, results of operations or liquidity of the Corporation, as the Corporation has not reported extraordinary items.

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Loans and Leases - Summary of Non-Performing Assets (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled debt restructurings	$ 42,855	$ 41,152
Non-Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	45,029	45,113
Troubled debt restructurings	22,022	23,439
Total non-performing loans	67,051	68,552
Other real estate owned (OREO)	40,796	41,466
Total non-performing assets	$ 107,847	$ 110,018
Non-performing loans as a percent of total loans and leases	0.59%	0.61%
Non-performing loans + OREO as a percent of total loans and leases + OREO	0.94%	0.97%
Non-performing assets as a percent of total assets	0.66%	0.68%

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Securities - Schedule of Amortized Cost and Fair Value of Securities Available for Sale (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, Amortized Cost	$ 1,524,825	$ 1,534,771
Securities Available For Sale, Gross Unrealized Gains	18,943	11,215
Securities Available For Sale, Gross Unrealized Losses	(6,688)	(11,921)
Securities Available For Sale, Fair Value	1,537,080	1,534,065
U.S. Treasury [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, Amortized Cost	29,637	29,604
Securities Available For Sale, Gross Unrealized Gains	300	78
Securities Available For Sale, Fair Value	29,937	29,682
U.S. Government-Sponsored Entities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, Amortized Cost	388,363	338,330
Securities Available For Sale, Gross Unrealized Gains	2,818	742
Securities Available For Sale, Gross Unrealized Losses	(521)	(1,939)
Securities Available For Sale, Fair Value	390,660	337,133
Agency Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, Amortized Cost	494,497	546,572
Securities Available For Sale, Gross Unrealized Gains	11,064	7,548
Securities Available For Sale, Gross Unrealized Losses		(35)
Securities Available For Sale, Fair Value	505,561	554,085
Securities Available For Sale, Fair Value	505,561
Agency Collateralized Mortgage Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, Amortized Cost	573,738	580,601
Securities Available For Sale, Gross Unrealized Gains	3,646	1,617
Securities Available For Sale, Gross Unrealized Losses	(5,367)	(9,047)
Securities Available For Sale, Fair Value	572,017	573,171
Securities Available For Sale, Fair Value	572,017
Non-Agency Collateralized Mortgage Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, Amortized Cost	1,359	1,414
Securities Available For Sale, Gross Unrealized Gains	5	17
Securities Available For Sale, Fair Value	1,364	1,431
Securities Available For Sale, Fair Value	1,364
Commercial Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, Amortized Cost	6,844	7,891
Securities Available For Sale, Gross Unrealized Losses	(1)	(11)
Securities Available For Sale, Fair Value	6,843	7,880
Securities Available For Sale, Fair Value	6,843
States of the U.S. and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, Amortized Cost	12,713	12,713
Securities Available For Sale, Gross Unrealized Gains	476	477
Securities Available For Sale, Gross Unrealized Losses	(14)	(32)
Securities Available For Sale, Fair Value	13,175	13,158
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, Amortized Cost	16,643	16,615
Securities Available For Sale, Gross Unrealized Gains	373	420
Securities Available For Sale, Gross Unrealized Losses	(785)	(857)
Securities Available For Sale, Fair Value	16,231	16,178
Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, Amortized Cost	1,523,794	1,533,740
Securities Available For Sale, Gross Unrealized Gains	18,682	10,899
Securities Available For Sale, Gross Unrealized Losses	(6,688)	(11,921)
Securities Available For Sale, Fair Value	1,535,788	1,532,718
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, Amortized Cost	1,031	1,031
Securities Available For Sale, Gross Unrealized Gains	261	316
Securities Available For Sale, Gross Unrealized Losses	0	0
Securities Available For Sale, Fair Value	1,292	1,347
Securities Available For Sale, Fair Value	$ 1,292

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Loans and Leases (Tables)

3 Months Ended

Mar. 31, 2015

Receivables [Abstract]

Summary of Loans and Leases, Net of Unearned Income

Following is a summary of loans and leases, net of unearned income:

	Originated Loans		Acquired Loans		Total Loans and Leases
March 31, 2015
Commercial real estate	$	3,082,385	$	734,804	$	3,817,189
Commercial and industrial		2,281,075		116,656		2,397,731
Commercial leases		180,207		—		180,207
Total commercial loans and leases		5,543,667		851,460		6,395,127
Direct installment		1,594,846		58,775		1,653,621
Residential mortgages		877,437		421,660		1,299,097
Indirect installment		903,780		1,424		905,204
Consumer lines of credit		953,569		154,849		1,108,418
Other		42,632		—		42,632
	$	9,915,931	$	1,488,168	$	11,404,099
December 31, 2014
Commercial real estate	$	3,031,810	$	783,898	$	3,815,708
Commercial and industrial		2,197,793		120,222		2,318,015
Commercial leases		177,824		—		177,824
Total commercial loans and leases		5,407,427		904,120		6,311,547
Direct installment		1,579,770		64,851		1,644,621
Residential mortgages		817,586		445,467		1,263,053
Indirect installment		873,645		1,906		875,551
Consumer lines of credit		946,427		164,549		1,110,976
Other		41,290		—		41,290
	$	9,666,145	$	1,580,893	$	11,247,038

Summary of Outstanding Principal Balance and Carrying Amount of Acquired Loans

The outstanding balance and the carrying amount of acquired loans included in the consolidated balance sheet are as follows:

	March 31, 2015		December 31, 2014
Accounted for under ASC 310-30:
Outstanding balance	$	1,513,616	$	1,597,558
Carrying amount		1,259,995		1,344,171
Accounted for under ASC 310-20:
Outstanding balance		232,524		242,488
Carrying amount		220,921		228,748
Total acquired loans:
Outstanding balance		1,746,140		1,840,046
Carrying amount		1,480,916		1,572,919

Summary of Change in Accretable Yield of Acquired Loans

The following table provides changes in accretable yield for all acquired loans accounted for under ASC 310-30. Loans accounted for under ASC 310-20 are not included in this table.

	Three Months Ended
	March 31,
	2015			2014
Balance at beginning of period	$	331,899		$	305,646
Reduction due to unexpected early payoffs		(11,909	)		(12,694	)
Reclass from non-accretable difference		7,676			768
Disposals/transfers		(118	)		(944	)
Accretion		(16,264	)		(15,913	)
Balance at end of period	$	311,284		$	276,863

Summary of Non-Performing Assets

Following is a summary of non-performing assets:

	March 31, 2015			December 31, 2014
Non-accrual loans	$	45,029		$	45,113
Troubled debt restructurings		22,022			23,439
Total non-performing loans		67,051			68,552
Other real estate owned (OREO)		40,796			41,466
Total non-performing assets	$	107,847		$	110,018
Asset quality ratios:
Non-performing loans as a percent of total loans and leases		0.59	%		0.61	%
Non-performing loans + OREO as a percent of total loans and leases + OREO		0.94	%		0.97	%
Non-performing assets as a percent of total assets		0.66	%		0.68	%

Age Analysis of Past Due Loans, by Class

The following tables provide an analysis of the aging of the Corporation’s past due loans by class, segregated by loans and leases originated and loans acquired:

	30-89 Days Past Due		> 90 Days Past Due and Still Accruing		Non-Accrual		Total Past Due		Current		Total Loans and Leases
Originated Loans and Leases
March 31, 2015
Commercial real estate	$	6,655	$	130	$	23,653	$	30,438	$	3,051,947	$	3,082,385
Commercial and industrial		2,939		3		8,846		11,788		2,269,287		2,281,075
Commercial leases		1,097		—		732		1,829		178,378		180,207
Total commercial loans and leases		10,691		133		33,231		44,055		5,499,612		5,543,667
Direct installment		8,748		3,575		6,464		18,787		1,576,059		1,594,846
Residential mortgages		7,040		1,731		3,625		12,396		865,041		877,437
Indirect installment		5,015		409		1,111		6,535		897,245		903,780
Consumer lines of credit		2,501		656		598		3,755		949,814		953,569
Other		47		39		—		86		42,546		42,632
	$	34,042	$	6,543	$	45,029	$	85,614	$	9,830,317	$	9,915,931
December 31, 2014
Commercial real estate	$	9,601	$	313	$	24,132	$	34,046	$	2,997,764	$	3,031,810
Commercial and industrial		2,446		3		8,310		10,759		2,187,034		2,197,793
Commercial leases		961		43		722		1,726		176,098		177,824
Total commercial loans and leases		13,008		359		33,164		46,531		5,360,896		5,407,427
Direct installment		9,333		3,617		7,117		20,067		1,559,703		1,579,770
Residential mortgages		8,709		3,891		2,964		15,564		802,022		817,586
Indirect installment		7,804		684		1,149		9,637		864,008		873,645
Consumer lines of credit		2,408		562		719		3,689		942,738		946,427
Other		13		135		—		148		41,142		41,290
	$	41,275	$	9,248	$	45,113	$	95,636	$	9,570,509	$	9,666,145

	30-89 Days Past Due		> 90 Days Past Due and Still Accruing		Total Past Due (1) (2)		Current		Discount			Total Loans
Acquired Loans
March 31, 2015
Commercial real estate	$	8,813	$	12,445	$	21,258	$	753,073	$	(39,527	)	$	734,804
Commercial and industrial		1,023		1,651		2,674		122,604		(8,622	)		116,656
Total commercial loans		9,836		14,096		23,932		875,677		(48,149	)		851,460
Direct installment		1,199		1,112		2,311		55,476		988			58,775
Residential mortgages		7,695		18,535		26,230		434,061		(38,631	)		421,660
Indirect installment		9		17		26		1,648		(250	)		1,424
Consumer lines of credit		1,115		2,146		3,261		156,676		(5,088	)		154,849
	$	19,854	$	35,906	$	55,760	$	1,523,538	$	(91,130	)	$	1,488,168
December 31, 2014
Commercial real estate	$	12,076	$	12,368	$	24,444	$	799,991	$	(40,537	)	$	783,898
Commercial and industrial		687		1,968		2,655		127,535		(9,968	)		120,222
Total commercial loans		12,763		14,336		27,099		927,526		(50,505	)		904,120
Direct installment		2,670		1,443		4,113		59,532		1,206			64,851
Residential mortgages		8,159		19,936		28,095		456,810		(39,438	)		445,467
Indirect installment		38		30		68		2,179		(341	)		1,906
Consumer lines of credit		1,048		2,279		3,327		166,912		(5,690	)		164,549
	$	24,678	$	38,024	$	62,702	$	1,612,959	$	(94,768	)	$	1,580,893

(1) Past due information for acquired loans is based on the contractual balance outstanding at March 31, 2015 and December 31, 2014.

(2) Acquired loans are considered performing upon acquisition, regardless of whether the customer is contractually delinquent, if the Corporation can reasonably estimate the timing and amount of expected cash flows on such loans. Accordingly, the Corporation does not consider acquired contractually delinquent loans to be non-accrual or non-performing and continues to recognize interest income on these loans using the accretion method.

Summary of Commercial Loans and Leases by Credit Quality

The following tables present a summary of the Corporation’s commercial loans and leases by credit quality category, segregated by loans and leases originated and loans acquired:

	Commercial Loan and Lease Credit Quality Categories
	Pass		Special Mention		Substandard		Doubtful		Total
Originated Loans and Leases
March 31, 2015
Commercial real estate	$	2,960,542	$	52,926	$	68,182	$	735	$	3,082,385
Commercial and industrial		2,190,066		53,482		36,081		1,446		2,281,075
Commercial leases		177,091		2,222		894		—		180,207
	$	5,327,699	$	108,630	$	105,157	$	2,181	$	5,543,667
December 31, 2014
Commercial real estate	$	2,890,830	$	58,630	$	81,951	$	399	$	3,031,810
Commercial and industrial		2,085,893		71,420		39,684		796		2,197,793
Commercial leases		174,677		2,198		949		—		177,824
	$	5,151,400	$	132,248	$	122,584	$	1,195	$	5,407,427
Acquired Loans
March 31, 2015
Commercial real estate	$	579,462	$	64,892	$	90,450		—	$	734,804
Commercial and industrial		102,974		2,411		11,271		—		116,656
	$	682,436	$	67,303	$	101,721		—	$	851,460
December 31, 2014
Commercial real estate	$	610,260	$	73,891	$	99,747		—	$	783,898
Commercial and industrial		103,862		3,506		12,854		—		120,222
	$	714,122	$	77,397	$	112,601		—	$	904,120

Summary of Consumer Loans by Payment Status

Following is a table showing originated consumer loans by payment status:

	Consumer Loan Credit Quality by Payment Status
	Performing		Non-Performing		Total
March 31, 2015
Direct installment	$	1,581,078	$	13,768	$	1,594,846
Residential mortgages		862,965		14,472		877,437
Indirect installment		902,515		1,265		903,780
Consumer lines of credit		951,980		1,589		953,569
Other		42,632		—		42,632
December 31, 2014
Direct installment	$	1,565,090	$	14,680	$	1,579,770
Residential mortgages		802,522		15,064		817,586
Indirect installment		872,340		1,305		873,645
Consumer lines of credit		944,631		1,796		946,427
Other		41,290		—		41,290

Summary of Impaired Loans and Leases, by Class

Following is a summary of information pertaining to originated loans and leases considered to be impaired, by class of loan and lease:

	Unpaid Contractual Principal Balance		Recorded Investment With No Specific Reserve		Recorded Investment With Specific Reserve		Total Recorded Investment		Specific Reserve		Average Recorded Investment
At or for the Three Months Ended March 31, 2015
Commercial real estate	$	34,483	$	25,015	$	1,012	$	26,027	$	735	$	26,176
Commercial and industrial		11,251		8,138		1,928		10,066		1,446		9,811
Commercial leases		732		732		—		732		—		727
Total commercial loans and leases		46,466		33,885		2,940		36,825		2,181		36,714
Direct installment		13,977		13,768		—		13,768		—		14,343
Residential mortgages		15,718		14,472		—		14,472		—		15,547
Indirect installment		1,425		1,265		—		1,265		—		1,363
Consumer lines of credit		1,600		1,589		—		1,589		—		1,696
Other		—		—		—		—		—		—
	$	79,186	$	64,979	$	2,940	$	67,919	$	2,181	$	69,663
At or for the Year Ended December 31, 2014
Commercial real estate	$	34,583	$	25,443	$	883	$	26,326	$	399	$	30,807
Commercial and industrial		11,412		7,609		1,948		9,557		780		9,510
Commercial leases		722		722		—		722		—		686
Total commercial loans and leases		46,717		33,774		2,831		36,605		1,179		41,003
Direct installment		14,987		14,680		—		14,680		—		14,248
Residential mortgages		16,791		15,064		—		15,064		—		16,924
Indirect installment		1,467		1,305		—		1,305		—		1,399
Consumer lines of credit		1,803		1,796		—		1,796		—		1,793
Other		—		—		—		—		—		—
	$	81,765	$	66,619	$	2,831	$	69,450	$	1,179	$	75,367

Summary of Payment Status of Total TDRs

Following is a summary of the payment status of total TDRs:

	March 31, 2015		December 31, 2014
Accruing:
Performing	$	12,793	$	9,441
Non-performing		22,022		23,439
Non-accrual		8,040		8,272
	$	42,855	$	41,152

Summary of Troubled Debt Restructurings by Class of Loans

The majority of TDRs are the result of interest rate concessions for a limited period of time. Following is a summary of loans, by class, that have been restructured:

	Three Months Ended March 31, 2015						Three Months Ended March 31, 2014
	Number of Contracts		Pre-Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment		Number of Contracts		Pre-Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment
Commercial real estate		2	$	312	$	196		1	$	188	$	188
Commercial and industrial		—		—		—		1		52		50
Total commercial loans		2		312		196		2		240		238
Direct installment		131		1,526		1,484		126		1,678		1,647
Residential mortgages		14		581		631		9		281		280
Indirect installment		5		16		16		7		17		16
Consumer lines of credit		16		270		270		7		255		255
Other		—		—		—		—		—		—
		168	$	2,705	$	2,597		151	$	2,471	$	2,436

Summary of Troubled Debt Restructurings by Class of Loans and Leases, Payment Default

Following is a summary of TDRs, by class of loans and leases, for which there was a payment default, excluding loans that were either charged-off or cured by period end. Default occurs when a loan is 90 days or more past due and is within 12 months of restructuring.

	Three Months Ended March 31, 2015 (1)				Three Months Ended March 31, 2014 (1)
	Number of Contracts		Recorded Investment		Number of Contracts		Recorded Investment
Direct installment		37	$	105		18	$	171
Residential mortgages		2		102		—		—
Indirect installment		3		4		1		—
Consumer lines of credit		1		92		—		—
Other		—		—		—		—
		43	$	303		19	$	171

(1) The recorded investment is as of period end.

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Allowance for Credit Losses (Tables)

3 Months Ended

Mar. 31, 2015

Receivables [Abstract]

Summary of Changes in Allowance for Credit Losses by Loan and Lease Class

Following is a summary of changes in the allowance for credit losses, by loan and lease class:

	Balance at Beginning of Period		Charge- Offs			Recoveries		Net Charge- Offs			Provision for credit losses			Balance at End of Period
Three Months Ended March 31, 2015
Commercial real estate	$	37,588	$	(1,001	)	$	209	$	(792	)	$	1,996		$	38,792
Commercial and industrial		32,645		(684	)		120		(564	)		722			32,803
Commercial leases		2,398		(93	)		10		(83	)		261			2,576
Total commercial loans and leases		72,631		(1,778	)		339		(1,439	)		2,979			74,171
Direct installment		20,538		(2,433	)		269		(2,164	)		2,830			21,204
Residential mortgages		8,024		(511	)		15		(496	)		943			8,471
Indirect installment		7,504		(1,280	)		302		(978	)		1,131			7,657
Consumer lines of credit		8,496		(410	)		40		(370	)		764			8,890
Other		759		(335	)		11		(324	)		419			854
Total allowance on originated loans and leases		117,952		(6,747	)		976		(5,771	)		9,066			121,247
Purchased credit-impaired loans		660		(64	)		19		(45	)		6			621
Other acquired loans		7,314		(77	)		330		253			(936	)		6,631
Total allowance on acquired loans		7,974		(141	)		349		208			(930	)		7,252
Total allowance	$	125,926	$	(6,888	)	$	1,325	$	(5,563	)	$	8,136		$	128,499
Three Months Ended March 31, 2014
Commercial real estate	$	32,548	$	(2,223	)	$	299	$	(1,924	)	$	7,910		$	38,534
Commercial and industrial		32,603		(513	)		370		(143	)		(2,489	)		29,971
Commercial leases		1,903		(87	)		29		(58	)		99			1,944
Total commercial loans and leases		67,054		(2,823	)		698		(2,125	)		5,520			70,449
Direct installment		17,824		(2,521	)		267		(2,254	)		1,060			16,630
Residential mortgages		5,836		(132	)		4		(128	)		(401	)		5,307
Indirect installment		6,409		(802	)		217		(585	)		676			6,500
Consumer lines of credit		7,231		(323	)		55		(268	)		695			7,658
Other		530		(262	)		5		(257	)		306			579
Total allowance on originated loans and leases		104,884		(6,863	)		1,246		(5,617	)		7,856			107,123
Purchased credit-impaired loans		1,000		(249	)		—		(249	)		(43	)		708
Other acquired loans		4,900		9			286		295			(807	)		4,388
Total allowance on acquired loans		5,900		(240	)		286		46			(850	)		5,096
Total allowance	$	110,784	$	(7,103	)	$	1,532	$	(5,571	)	$	7,006		$	112,219

Summary of Individual and Collective Allowance for Credit Losses and Loan and Lease Balances by Class

Following is a summary of the individual and collective originated allowance for credit losses and corresponding loan and lease balances by class:

	Allowance				Loans and Leases Outstanding
	Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Loans and Leases		Individually Evaluated for Impairment		Collectively Evaluated for Impairment
March 31, 2015
Commercial real estate	$	735	$	38,057	$	3,082,385	$	12,865	$	3,069,520
Commercial and industrial		1,446		31,357		2,281,075		5,711		2,275,364
Commercial leases		—		2,576		180,207		—		180,207
Total commercial loans and leases		2,181		71,990		5,543,667		18,576		5,525,091
Direct installment		—		21,204		1,594,846		—		1,594,846
Residential mortgages		—		8,471		877,437		—		877,437
Indirect installment		—		7,657		903,780		—		903,780
Consumer lines of credit		—		8,890		953,569		—		953,569
Other		—		854		42,632		—		42,632
	$	2,181	$	119,066	$	9,915,931	$	18,576	$	9,897,355
December 31, 2014
Commercial real estate	$	399	$	37,189	$	3,031,810	$	13,952	$	3,017,858
Commercial and industrial		780		31,865		2,197,793		5,837		2,191,956
Commercial leases		—		2,398		177,824		—		177,824
Total commercial loans and leases		1,179		71,452		5,407,427		19,789		5,387,638
Direct installment		—		20,538		1,579,770		—		1,579,770
Residential mortgages		—		8,024		817,586		—		817,586
Indirect installment		—		7,504		873,645		—		873,645
Consumer lines of credit		—		8,496		946,427		—		946,427
Other		—		759		41,290		—		41,290
	$	1,179	$	116,773	$	9,666,145	$	19,789	$	9,646,356

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Business

3 Months Ended

Mar. 31, 2015

Accounting Policies [Abstract]

Business

BUSINESS

F.N.B. Corporation (the Corporation), headquartered in Pittsburgh, Pennsylvania, is a diversified financial services company operating in six states and three major metropolitan areas, including Pittsburgh, Baltimore, Maryland and Cleveland, Ohio. As of March 31, 2015, the Corporation had 287 banking offices throughout Pennsylvania, Ohio, Maryland and West Virginia. The Corporation provides a full range of commercial banking, consumer banking and wealth management solutions through its subsidiary network which is led by its largest affiliate, First National Bank of Pennsylvania (FNBPA). Commercial banking solutions include corporate banking, small business banking, investment real estate financing, international banking, business credit, capital markets and lease financing. Consumer banking provides a full line of consumer banking products and services including deposit products, mortgage lending, consumer lending and a complete suite of mobile and online banking services. Wealth management services include asset management, private banking and insurance. The Corporation also operates Regency Finance Company (Regency), which had 73 consumer finance offices in Pennsylvania, Ohio, Kentucky and Tennessee as of March 31, 2015.

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Borrowings (Tables)

3 Months Ended

Mar. 31, 2015

Debt Disclosure [Abstract]

Summary of Short-Term Borrowings

Following is a summary of short-term borrowings:

	March 31, 2015		December 31, 2014
Securities sold under repurchase agreements	$	757,279	$	882,696
Federal Home Loan Bank advances		500,000		820,000
Federal funds purchased		355,000		210,000
Subordinated notes		128,221		128,962
	$	1,740,500	$	2,041,658

Summary of Long-Term Borrowings

Following is a summary of long-term borrowings:

	March 31, 2015		December 31, 2014
Federal Home Loan Bank advances	$	400,018	$	400,042
Subordinated notes		83,197		83,155
Junior subordinated debt		58,259		58,246
	$	541,474	$	541,443

Junior Subordinated Debt Trusts

The following table provides information relating to the Trusts as of March 31, 2015:

	Trust Preferred Securities		Common Securities		Junior Subordinated Debt		Stated Maturity Date		Interest Rate
F.N.B. Statutory Trust II	$	21,500	$	665	$	22,165		6/15/36		1.92	%	Variable; LIBOR + 165 basis points (bps)
Omega Financial Capital Trust I		36,000		1,114		36,094		10/18/34		2.44	%	Variable; LIBOR + 219 bps
	$	57,500	$	1,779	$	58,259

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Stock Incentive Plans - Summary of Information Concerning Stock Option Awards (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Shares, Options outstanding at beginning of period	568,834	533,524
Shares, Assumed from acquisition		304,785
Shares, Exercised	(60,094)	(87,332)
Shares, Forfeited	(2,182)	(48,172)
Shares, Options outstanding and exercisable at end of period	506,558	702,805
Weighted Average Exercise Price, Options outstanding at beginning of period	$ 8.86	$ 11.50
Weighted Average Exercise Price , Assumed from acquisition		$ 5.77
Weighted Average Price per Share, Exercised	$ 5.04	$ 6.05
Weighted Average Exercise Price , Forfeited	$ 4.34	$ 25.79
Weighted Average Exercise Price , Options outstanding and exercisable at end of period	$ 9.33	$ 8.71

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Business Segments (Tables)

3 Months Ended

Mar. 31, 2015

Segment Reporting [Abstract]

Financial Information for Segments of Corporation

The following tables provide financial information for these segments of the Corporation. The information provided under the caption “Parent and Other” represents operations not considered to be reportable segments and/or general operating expenses of the Corporation, and includes the parent company, other non-bank subsidiaries and eliminations and adjustments which are necessary for purposes of reconciliation to the consolidated amounts.

	Community Banking		Wealth Management		Insurance			Consumer Finance		Parent and Other			Consolidated
At or for the Three Months Ended March 31, 2015
Interest income	$	122,118	$	—	$	23		$	9,593	$	1,635		$	133,369
Interest expense		9,941		—		—			860		647			11,448
Net interest income		112,177		—		23			8,733		988			121,921
Provision for credit losses		6,327		—		—			1,574		235			8,136
Non-interest income		27,301		8,387		3,593			676		(1,775	)		38,182
Non-interest expense		77,079		6,493		4,170			4,808		(10	)		92,540
Intangible amortization		1,947		68		100			—		—			2,115
Income tax expense (benefit)		15,931		658		(226	)		1,149		(543	)		16,969
Net income (loss)		38,194		1,168		(428	)		1,878		(469	)		40,343
Total assets		16,100,851		21,125		18,464			182,662		(44,254	)		16,278,848
Total intangibles		852,764		10,652		10,021			1,809		—			875,246
At or for the Three Months Ended March 31, 2014
Interest income	$	106,691	$	—	$	25		$	9,365	$	1,799		$	117,880
Interest expense		8,248		—		—			846		961			10,055
Net interest income		98,443		—		25			8,519		838			107,825
Provision for credit losses		5,296		—		—			1,457		253			7,006
Non-interest income		31,913		7,323		4,210			660		(2,036	)		42,070
Non-interest expense		76,866		6,292		3,046			4,937		742			91,883
Intangible amortization		2,110		72		101			—		—			2,283
Income tax expense (benefit)		13,343		351		385			1,073		(953	)		14,199
Net income (loss)		32,741		608		703			1,712		(1,240	)		34,524
Total assets		14,299,543		19,542		19,954			182,018		(44,547	)		14,476,510
Total intangibles		833,642		10,936		10,425			1,809		—			856,812

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Loans and Leases - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial construction loans	$ 227,179		$ 296,156
Carrying amount	11,404,099		11,247,038
Sustained period of delinquency for impairment evaluation	90 days	90 days
Minimum corporation reserves for commercial loan	500
Minimum amount to allocate specific valuation allowance	500
Allowance for loan losses	7,252		7,974
Restructured loans returned to performing status	3,975
Valuation for impairment of loans with pooled reserves	500		500
Pooled reserves for all other classes of loans	4,146		3,448
Consumer Lines of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans	174,239		180,588
Carrying amount	1,108,418		1,110,976
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount	3,817,189		3,815,708
Allowance for loan losses	3,327		3,286
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount	2,397,731		2,318,015
Allowance for loan losses	712		1,484
Direct Installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount	1,653,621		1,644,621
Allowance for loan losses	1,477		1,847
Residential Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount	1,299,097		1,263,053
Allowance for loan losses	1,193		858
Indirect Installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount	905,204		875,551
Allowance for loan losses	229		232
Consumer Lines Of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	314		267
Loans and Leases Receivable Net of Deferred Income [Member] | Consumer Lines of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of portfolio	1.50%		1.60%
Loans and Leases Receivable Net of Deferred Income [Member] | Commercial Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of portfolio	2.00%		2.60%
Commercial Real Estate [Member] | Owner-Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of portfolio	40.80%		41.60%
Commercial Real Estate [Member] | Non-Owner-Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of portfolio	59.20%		58.40%
Specific reserves for commercial TDRs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Reserves in allowance for loan losses, TDRs	646		371
Pooled reserves for commercial TDRs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Reserves in allowance for loan losses, TDRs	1,203		1,215
Purchased Credit-Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount	7,100		9,556
Purchased Credit-Impaired Loans [Member] | Acquired Loans Receivable [Member] | Credit Concentration Risk [Member] | Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of portfolio	1.00%
Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Threshold period past due for default non-accrual status of trade accounts receivable	90 days
Installment Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Threshold period past due for default non-accrual status of trade accounts receivable	120 days
Residential Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Threshold period past due for default non-accrual status of trade accounts receivable	180 days
Carrying value of OREO through foreclosure	3,541
Mortgage loans on real estate, foreclosure	$ 14,186

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Derivative and Hedging Activities - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Derivative [Line Items]
Notional amount	$ 2,320,750		$ 2,215,056
Derivative assets	57,551		45,898
Derivative liabilities	54,431		46,160
Interest income	121,921	107,825
Amounts reclassified from accumulated other comprehensive Income	(520)
Additional amount in excess of posted collateral required in case of breached agreements	2,071		1,862
Interest Rate Contracts [Member]
Derivative [Line Items]
Notional amount	200,000		200,000
Period to reclassification of cash flow hedge gain loss	12 months
Maximum length of time hedged in interest rate cash flow hedge	9 years
Derivative gains to be reclassified within twelve months	2,929
Derivative gains to be reclassified within twelve months, net of tax	1,904
Derivative gain or loses excluded from assessment of hedge effectiveness	0
Hedge ineffectiveness	0	0
Gains or losses from cash flow hedge derivatives reclassified to earnings	0	0
Interest Rate Contracts [Member] | Amount Reclassified from Other Comprehensive Income [Member]
Derivative [Line Items]
Interest income	810
Amounts reclassified from accumulated other comprehensive Income	526
Interest Rate Swap [Member]
Derivative [Line Items]
Notional amount	1,020,957		972,002
Credit Risk Contract Sold [Member]
Derivative [Line Items]
Notional amount	50,061
Risk participation agreements, minimum term	2 years
Risk participation agreements, maximum term	9 years
Maximum exposure under credit risk agreement assuming customer default	70		21
Trading Assets [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative assets	53,575		43,742
Not for Trading Assets [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Derivative assets	3,937		2,109
Trading Liabilities [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative liabilities	53,723		43,783
Not for Trading Liabilities [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Derivative liabilities	$ 669		$ 2,330

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Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Assets
Cash and due from banks	$ 191,347	$ 196,240
Interest bearing deposits with banks	42,899	91,153
Cash and Cash Equivalents	234,246	287,393
Securities available for sale	1,537,080	1,534,065
Securities held to maturity (fair value of $1,536,449 and $1,468,258)	1,513,204	1,453,355
Residential mortgage loans held for sale	4,621	6,180
Loans and leases, net of unearned income of $50,916 and $56,131	11,404,099	11,247,038
Allowance for credit losses	(128,499)	(125,926)
Net Loans and Leases	11,275,600	11,121,112
Premises and equipment, net	169,859	168,756
Goodwill	829,726	832,213
Core deposit and other intangible assets, net	45,520	47,504
Bank owned life insurance	303,102	301,771
Other assets	365,890	374,741
Total Assets	16,278,848	16,127,090
Liabilities
Non-interest bearing demand	2,728,599	2,647,623
Interest bearing demand	4,724,985	4,547,628
Savings	1,763,275	1,575,922
Certificates and other time deposits	2,589,184	2,611,035
Total Deposits	11,806,043	11,382,208
Short-term borrowings	1,740,500	2,041,658
Long-term borrowings	541,474	541,443
Other liabilities	135,555	140,325
Total Liabilities	14,223,572	14,105,634
Stockholders' Equity
Preferred stock - $0.01 par value Authorized - 20,000,000 shares Issued - 110,877 shares	106,882	106,882
Common stock-$0.01 par value Authorized - 500,000,000 shares Issued - 176,305,233 and 175,450,303 shares	1,763	1,754
Additional paid-in capital	1,805,991	1,798,984
Retained earnings	193,461	176,120
Accumulated other comprehensive loss	(34,980)	(46,003)
Treasury stock - 1,613,531 and 1,458,045 shares at cost	(17,841)	(16,281)
Total Stockholders' Equity	2,055,276	2,021,456
Total Liabilities and Stockholders' Equity	$ 16,278,848	$ 16,127,090

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Securities - Schedule of Amortized Cost and Fair Value of Securities Held to Maturity (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Investment Securities Held To Maturity [Line Items]
Securities Held To Maturity, Amortized Cost	$ 1,513,204	$ 1,453,355
Securities Held To Maturity, Gross Unrealized Gains	28,454	23,145
Securities Held To Maturity, Gross Unrealized Losses	(5,209)	(8,242)
Securities held to maturity, fair value	1,536,449	1,468,258
U.S. Treasury [Member]
Investment Securities Held To Maturity [Line Items]
Securities Held To Maturity, Amortized Cost	500	502
Securities Held To Maturity, Gross Unrealized Gains	182	168
Securities held to maturity, fair value	682	670
U.S. Government-Sponsored Entities [Member]
Investment Securities Held To Maturity [Line Items]
Securities Held To Maturity, Amortized Cost	146,578	101,602
Securities Held To Maturity, Gross Unrealized Gains	1,731	885
Securities Held To Maturity, Gross Unrealized Losses	(149)	(524)
Securities held to maturity, fair value	148,160	101,963
Agency Mortgage-Backed Securities [Member]
Investment Securities Held To Maturity [Line Items]
Securities Held To Maturity, Amortized Cost	674,101	677,169
Securities Held To Maturity, Gross Unrealized Gains	19,130	16,712
Securities Held To Maturity, Gross Unrealized Losses	(20)	(346)
Securities held to maturity, fair value	693,211	693,535
Agency Collateralized Mortgage Obligations [Member]
Investment Securities Held To Maturity [Line Items]
Securities Held To Maturity, Amortized Cost	505,859	501,965
Securities Held To Maturity, Gross Unrealized Gains	3,633	1,858
Securities Held To Maturity, Gross Unrealized Losses	(4,884)	(7,329)
Securities held to maturity, fair value	504,608	496,494
Non-Agency Collateralized Mortgage Obligations [Member]
Investment Securities Held To Maturity [Line Items]
Securities Held To Maturity, Amortized Cost	3,840	4,285
Securities Held To Maturity, Gross Unrealized Gains	21	28
Securities held to maturity, fair value	3,861	4,313
Commercial Mortgage-Backed Securities [Member]
Investment Securities Held To Maturity [Line Items]
Securities Held To Maturity, Amortized Cost	17,484	17,560
Securities Held To Maturity, Gross Unrealized Gains	385	179
Securities held to maturity, fair value	17,869	17,739
States of the U.S. and Political Subdivisions [Member]
Investment Securities Held To Maturity [Line Items]
Securities Held To Maturity, Amortized Cost	164,842	150,272
Securities Held To Maturity, Gross Unrealized Gains	3,372	3,315
Securities Held To Maturity, Gross Unrealized Losses	(156)	(43)
Securities held to maturity, fair value	$ 168,058	$ 153,544

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Fair Value Measurements - Additional Information about Assets Measured at Fair Value on Recurring Basis (Detail) (Fair Value, Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	$ 1,895	$ 33,749
Total gains (losses) - realized/unrealized, Included in earnings		13,766
Total gains (losses) - realized/unrealized, Included in other comprehensive income	(52)	5,676
Accretion included in earnings	1	662
Purchases	0	0
Issuances	0	0
Sales/redemptions		(51,527)
Settlements	(55)	(431)
Transfers from Level 3	0	0
Transfers into Level 3	0	0
Balance at end of period	1,789	1,895
Pooled Trust Preferred Collateralized Debt Obligations [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period		31,595
Total gains (losses) - realized/unrealized, Included in earnings		13,766
Total gains (losses) - realized/unrealized, Included in other comprehensive income		5,608
Accretion included in earnings		657
Purchases	0	0
Issuances	0	0
Sales/redemptions		(51,527)
Settlements		(99)
Transfers from Level 3	0	0
Transfers into Level 3	0	0
Equity Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	475	410
Total gains (losses) - realized/unrealized, Included in other comprehensive income	(40)	65
Purchases	0	0
Issuances	0	0
Transfers from Level 3	0	0
Transfers into Level 3	0	0
Balance at end of period	435	475
Residential Non-Agency Collateralized Mortgage Obligations [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	1,420	1,744
Total gains (losses) - realized/unrealized, Included in other comprehensive income	(12)	3
Accretion included in earnings	1	5
Purchases	0	0
Issuances	0	0
Settlements	(55)	(332)
Transfers from Level 3	0	0
Transfers into Level 3	0	0
Balance at end of period	$ 1,354	$ 1,420

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Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Statement of Stockholders' Equity [Abstract]
Common stock dividends per share	$ 0.12	$ 0.12

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Fair Value Measurements - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended	3 Months Ended
	Mar. 31, 2015 Securities	Dec. 31, 2014 Securities	Mar. 31, 2014
Fair Value Measurements Disclosure [Line Items]
Percentage of securities using market-based information	99.90%
Percentage of securities using model-based techniques	0.10%
Minimum corporation reserves for commercial loan	$ 500
Number of securities transferred between hierarchy levels	0	0
Impaired loans, carrying amount	67,919	69,450
Allocated allowance for loan losses	2,181
Fair value of allocated allowance	883
Estimated costs to sell	124
Provision for fair value measurements included in allowance for loan losses	1,002
Carrying amount of OREO	2,501
Written down of OREO	2,140
Fair value of OREO	2,410
Estimated cost to sell OREO	270
Loss from OREO included in earnings	361
Short-term borrowings approximate fair value for amounts that mature, days, less than	90 days
Fair Value, Measurements, Nonrecurring [Member]
Fair Value Measurements Disclosure [Line Items]
Impaired loans, carrying amount	2,940
Allocated allowance for loan losses	883	1,705
Fair value of OREO	2,410	8,060
Assets Still Held [Member]
Fair Value Measurements Disclosure [Line Items]
Change in unrealized gains or losses included in earnings relating to assets still held	$ 0		$ 0

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Loans and Leases - Summary of Consumer Loans by Payment Status (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Credit Quality [Line Items]
Total Loans	$ 11,404,099	$ 11,247,038
Non-Performing [Member]
Credit Quality [Line Items]
Non-Performing Loans	67,051	68,552
Direct Installment [Member]
Credit Quality [Line Items]
Total Loans	1,653,621	1,644,621
Direct Installment [Member] | Performing [Member]
Credit Quality [Line Items]
Performing Loans	1,581,078	1,565,090
Direct Installment [Member] | Non-Performing [Member]
Credit Quality [Line Items]
Non-Performing Loans	13,768	14,680
Residential Mortgages [Member]
Credit Quality [Line Items]
Total Loans	1,299,097	1,263,053
Residential Mortgages [Member] | Performing [Member]
Credit Quality [Line Items]
Performing Loans	862,965	802,522
Residential Mortgages [Member] | Non-Performing [Member]
Credit Quality [Line Items]
Non-Performing Loans	14,472	15,064
Indirect Installment [Member]
Credit Quality [Line Items]
Total Loans	905,204	875,551
Indirect Installment [Member] | Performing [Member]
Credit Quality [Line Items]
Performing Loans	902,515	872,340
Indirect Installment [Member] | Non-Performing [Member]
Credit Quality [Line Items]
Non-Performing Loans	1,265	1,305
Consumer Lines of Credit [Member] | Performing [Member]
Credit Quality [Line Items]
Performing Loans	951,980	944,631
Consumer Lines of Credit [Member] | Non-Performing [Member]
Credit Quality [Line Items]
Non-Performing Loans	1,589	1,796
Other [Member]
Credit Quality [Line Items]
Total Loans	42,632	41,290
Other [Member] | Performing [Member]
Credit Quality [Line Items]
Performing Loans	42,632	41,290
Originated Loans [Member]
Credit Quality [Line Items]
Total Loans	9,915,931	9,666,145
Originated Loans [Member] | Direct Installment [Member]
Credit Quality [Line Items]
Total Loans	1,594,846	1,579,770
Originated Loans [Member] | Residential Mortgages [Member]
Credit Quality [Line Items]
Total Loans	877,437	817,586
Originated Loans [Member] | Indirect Installment [Member]
Credit Quality [Line Items]
Total Loans	903,780	873,645
Originated Loans [Member] | Consumer Lines of Credit [Member]
Credit Quality [Line Items]
Total Loans	953,569	946,427
Originated Loans [Member] | Other [Member]
Credit Quality [Line Items]
Total Loans	$ 42,632	$ 41,290

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Stock Incentive Plans (Tables)

3 Months Ended

Mar. 31, 2015

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

Summary of Information Concerning Restricted Stock Awards

The following table summarizes certain information concerning restricted stock awards:

	Three Months Ended March 31,
	2015					2014
	Awards			Weighted Average Grant Price		Awards			Weighted Average Grant Price
Unvested awards outstanding at beginning of period		1,354,093		$	11.86		1,729,033		$	10.23
Net adjustment due to performance		(46,956	)		10.25		(19,002	)		8.48
Vested		(458,450	)		10.60		(667,956	)		9.01
Forfeited		(2,357	)		17.93		(430	)		10.69
Dividend reinvestment		7,656			14.24		9,612			13.01
Unvested awards outstanding at end of period		853,986			12.63		1,051,257			11.06

Components of Restricted Stock Awards

Compensation. The components of the restricted stock awards as of March 31, 2015 are as follows:

	Service- Based Awards		Performance- Based Awards		Total
Unvested awards		397,593		456,393		853,986
Unrecognized compensation expense	$	2,659	$	1,850	$	4,509
Intrinsic value	$	5,224	$	5,997	$	11,221
Weighted average remaining life (in years)		1.91		1.73		1.81

Summary of Information Concerning Stock Option Awards

The following table summarizes certain information concerning stock option awards:

	Three Months Ended March 31,
	2015					2014
	Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price
Options outstanding at beginning of period		568,834		$	8.86		533,524		$	11.50
Assumed from acquisition		—			—		304,785			5.77
Exercised		(60,094	)		5.04		(87,332	)		6.05
Forfeited		(2,182	)		4.34		(48,172	)		25.79
Options outstanding and exercisable at end of period		506,558			9.33		702,805			8.71

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Allowance for Credit Losses - Summary of Changes in Allowance for Credit Losses by Loan and Lease Class (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	$ 125,926	$ 110,784
Charge- Offs	(6,888)	(7,103)
Recoveries	1,325	1,532
Net Charge- Offs	(5,563)	(5,571)
Provision for credit losses	8,136	7,006
Balance at End of Period	128,499	112,219
Originated Loans [Member]
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	117,952	104,884
Charge- Offs	(6,747)	(6,863)
Recoveries	976	1,246
Net Charge- Offs	(5,771)	(5,617)
Provision for credit losses	9,066	7,856
Balance at End of Period	121,247	107,123
Acquired Loans [Member]
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	7,974	5,900
Charge- Offs	(141)	(240)
Recoveries	349	286
Net Charge- Offs	208	46
Provision for credit losses	(930)	(850)
Balance at End of Period	7,252	5,096
Commercial Real Estate [Member]
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	37,588	32,548
Charge- Offs	(1,001)	(2,223)
Recoveries	209	299
Net Charge- Offs	(792)	(1,924)
Provision for credit losses	1,996	7,910
Balance at End of Period	38,792	38,534
Commercial and Industrial [Member]
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	32,645	32,603
Charge- Offs	(684)	(513)
Recoveries	120	370
Net Charge- Offs	(564)	(143)
Provision for credit losses	722	(2,489)
Balance at End of Period	32,803	29,971
Commercial Leases [Member]
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	2,398	1,903
Charge- Offs	(93)	(87)
Recoveries	10	29
Net Charge- Offs	(83)	(58)
Provision for credit losses	261	99
Balance at End of Period	2,576	1,944
Total Commercial Loans and Leases [Member]
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	72,631	67,054
Charge- Offs	(1,778)	(2,823)
Recoveries	339	698
Net Charge- Offs	(1,439)	(2,125)
Provision for credit losses	2,979	5,520
Balance at End of Period	74,171	70,449
Direct Installment [Member]
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	20,538	17,824
Charge- Offs	(2,433)	(2,521)
Recoveries	269	267
Net Charge- Offs	(2,164)	(2,254)
Provision for credit losses	2,830	1,060
Balance at End of Period	21,204	16,630
Residential Mortgages [Member]
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	8,024	5,836
Charge- Offs	(511)	(132)
Recoveries	15	4
Net Charge- Offs	(496)	(128)
Provision for credit losses	943	(401)
Balance at End of Period	8,471	5,307
Indirect Installment [Member]
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	7,504	6,409
Charge- Offs	(1,280)	(802)
Recoveries	302	217
Net Charge- Offs	(978)	(585)
Provision for credit losses	1,131	676
Balance at End of Period	7,657	6,500
Consumer Lines of Credit [Member]
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	8,496	7,231
Charge- Offs	(410)	(323)
Recoveries	40	55
Net Charge- Offs	(370)	(268)
Provision for credit losses	764	695
Balance at End of Period	8,890	7,658
Other [Member]
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	759	530
Charge- Offs	(335)	(262)
Recoveries	11	5
Net Charge- Offs	(324)	(257)
Provision for credit losses	419	306
Balance at End of Period	854	579
Purchased Credit-Impaired Loans [Member]
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	660	1,000
Charge- Offs	(64)	(249)
Recoveries	19
Net Charge- Offs	(45)	(249)
Provision for credit losses	6	(43)
Balance at End of Period	621	708
Other Acquired Loans [Member]
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	7,314	4,900
Charge- Offs	(77)	9
Recoveries	330	286
Net Charge- Offs	253	295
Provision for credit losses	(936)	(807)
Balance at End of Period	$ 6,631	$ 4,388

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Income Taxes

3 Months Ended

Mar. 31, 2015

Income Tax Disclosure [Abstract]

Income Taxes

INCOME TAXES

The Corporation bases its provision for income taxes upon income before income taxes, adjusted for the effect of certain tax-exempt income and non-deductible expenses. In addition, the Corporation reports certain items of income and expense in different periods for financial reporting and tax return purposes. The Corporation recognizes the tax effects of these temporary differences currently in the deferred income tax provision or benefit. The Corporation computes deferred tax assets or liabilities based upon the differences between the financial statement and income tax bases of assets and liabilities using the applicable marginal tax rate.

The Corporation evaluates the probability that it will ultimately realize the full value of its deferred tax assets. Realization of the Corporation’s deferred tax assets is dependent upon a number of factors including the existence of any cumulative losses in prior periods, the amount of taxes paid in available carry-back periods, expectations for future earnings, applicable tax planning strategies and assessment of current and future economic and business conditions. The Corporation establishes a valuation allowance when it is “more likely than not” that the Corporation will not be able to realize a benefit from its deferred tax assets, or when future deductibility is uncertain.

At March 31, 2015, the Corporation anticipates that it will not utilize some of its state net operating loss carryforwards and other net deferred tax assets at certain of its subsidiaries and has recorded a valuation allowance against these deferred tax assets. The Corporation believes that, except for the portion which is covered by a valuation allowance, it is more likely than not the Corporation will realize the benefits of its deferred tax assets, net of the valuation allowance, at March 31, 2015, based on the levels of projected taxable income of some of its entities.

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Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2015

Compensation and Retirement Disclosure [Abstract]

Net Periodic Benefit Credit for Defined Benefit Plans

The net periodic benefit credit for the defined benefit plans includes the following components:

	Three Months Ended
	March 31,
	2015			2014
Service cost	$	17		$	16
Interest cost		1,477			1,596
Expected return on plan assets		(2,491	)		(2,487	)
Amortization:
Unrecognized net transition asset		—			(5	)
Unrecognized prior service cost		2			2
Unrecognized loss		536			337
Net periodic pension credit	$	(459	)	$	(541	)

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Fair Value Measurements - Fair Values of Corporation's Financial Instruments (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 234,246	$ 287,393	$ 246,253	$ 213,981
Securities available for sale	1,537,080	1,534,065
Securities held to maturity	1,513,204	1,453,355
Securities held to maturity	1,536,449	1,468,258
Derivative assets	57,551	45,898
Deposits	11,806,043	11,382,208
Short-term borrowings	1,740,500	2,041,658
Long-term borrowings	541,474	541,443
Derivative liabilities	54,431	46,160
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	234,246	287,393
Securities available for sale	1,537,080	1,534,065
Securities held to maturity	1,536,449	1,468,258
Net loans and leases, including loans held for sale	11,119,711	10,956,544
Derivative assets	57,551	45,898
Accrued interest receivable	41,935	40,231
Deposits	11,812,401	11,382,402
Short-term borrowings	1,740,499	2,041,672
Long-term borrowings	541,955	539,007
Derivative liabilities	54,431	46,160
Accrued interest payable	6,511	6,689
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	234,246	287,393
Securities available for sale	1,537,080	1,534,065
Securities held to maturity	1,513,204	1,453,355
Net loans and leases, including loans held for sale	11,280,221	11,127,292
Derivative assets	57,551	45,898
Accrued interest receivable	41,935	40,231
Deposits	11,806,043	11,382,208
Short-term borrowings	1,740,500	2,041,658
Long-term borrowings	541,474	541,443
Derivative liabilities	54,431	46,160
Accrued interest payable	6,511	6,689
Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	234,246	287,393
Securities available for sale	212	218
Accrued interest receivable	41,935	40,231
Deposits	9,217,159	8,771,173
Short-term borrowings	1,740,499	2,041,672
Accrued interest payable	6,511	6,689
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	1,535,079	1,531,952
Securities held to maturity	1,532,588	1,463,945
Derivative assets	57,551	45,898
Deposits	2,595,242	2,611,229
Derivative liabilities	54,431	46,160
Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	1,789	1,895
Securities held to maturity	3,861	4,313
Net loans and leases, including loans held for sale	11,119,711	10,956,544
Long-term borrowings	$ 541,955	$ 539,007

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Earnings Per Common Share

3 Months Ended

Mar. 31, 2015

Earnings Per Share [Abstract]

Earnings Per Common Share

EARNINGS PER COMMON SHARE

Basic earnings per common share is calculated by dividing net income available to common stockholders by the weighted average number of shares of common stock outstanding net of unvested shares of restricted stock.

Diluted earnings per common share is calculated by dividing net income available to common stockholders by the weighted average number of shares of common stock outstanding, adjusted for the dilutive effect of potential common shares issuable for stock options, warrants and restricted shares, as calculated using the treasury stock method. Adjustments to the weighted average number of shares of common stock outstanding are made only when such adjustments dilute earnings per common share.

The following table sets forth the computation of basic and diluted earnings per common share:

	Three Months Ended
	March 31,
	2015		2014
Net income	$	40,343	$	34,524
Less: Preferred stock dividends		2,010		2,322
Net income available to common stockholders	$	38,333	$	32,202
Basic weighted average common shares outstanding		174,152,283		162,186,395
Net effect of dilutive stock options, warrants, restricted stock and convertible debt		1,673,693		1,780,851
Diluted weighted average common shares outstanding		175,825,976		163,967,246
Earnings per common share:
Basic	$	0.22	$	0.20
Diluted	$	0.22	$	0.20

For the three months ended March 31, 2015 and 2014, 24,272 and 51,641 shares of common stock, respectively, related to stock options and warrants were excluded from the computation of diluted earnings per common share because the exercise price of the shares was greater than the average market price of the common shares and, therefore, the effect would be anti-dilutive.

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Borrowings - Summary of Long-Term Borrowings (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Debt Disclosure [Abstract]
Federal Home Loan Bank advances	$ 400,018	$ 400,042
Subordinated notes	83,197	83,155
Junior subordinated debt	58,259	58,246
Long-term debt	$ 541,474	$ 541,443

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Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Operating Activities
Net income	$ 40,343	$ 34,524
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization and accretion	11,725	8,339
Provision for credit losses	8,136	7,006
Deferred tax (benefit) expenses	3,217	(2,154)
Net securities losses (gains)	9	(9,461)
Tax benefit of stock-based compensation	(681)	(1,224)
Loans originated for sale	(71,499)	(18,245)
Loans sold	74,870	22,635
Gain on sale of loans	(1,813)	(1,193)
Net change in:
Interest receivable	(1,704)	(123)
Interest payable	(178)	(750)
Securities classified as trading in business combination and sold		203,178
Bank owned life insurance	(1,323)	(1,513)
Other, net	5,187	3,096
Net cash flows provided by operating activities	66,289	244,115
Investing Activities
Net change in loans and leases	(167,685)	(140,938)
Securities available for sale:
Purchases	(90,156)	(318,332)
Sales	33,228	85,877
Maturities	66,275	130,641
Securities held to maturity:
Purchases	(130,506)	(266,486)
Maturities	69,394	44,159
Purchase of bank owned life insurance	(8)	(4,433)
Withdrawal/surrender of bank owned life insurance		716
Increase in premises and equipment	(6,199)	(6,042)
Net cash received in business combinations		26,964
Net cash flows used in investing activities	(225,657)	(447,874)
Financing Activities
Demand (non-interest bearing and interest bearing) and savings accounts	445,685	253,935
Time deposits	(20,779)	(44,043)
Short-term borrowings	(301,158)	(24,615)
Increase in long-term borrowings	6,598	108,079
Decrease in long-term borrowings	(6,579)	(39,966)
Net proceeds from issuance of common stock	4,775	3,755
Tax benefit of stock-based compensation	681	1,224
Cash dividends paid:
Preferred stock	(2,010)	(2,322)
Common stock	(20,992)	(20,016)
Net cash flows provided by financing activities	106,221	236,031
Net (Decrease) Increase in Cash and Cash Equivalents	(53,147)	32,272
Cash and cash equivalents at beginning of period	287,393	213,981
Cash and Cash Equivalents at End of Period	$ 234,246	$ 246,253

XML

Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Securities held to maturity, fair value	$ 1,536,449	$ 1,468,258
Unearned income on loans	$ 50,916	$ 56,131
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	20,000,000	20,000,000
Preferred stock, shares issued	110,877	110,877
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	176,305,233	175,450,303
Treasury stock, shares	1,613,531	1,458,045

XML

Borrowings

3 Months Ended

Mar. 31, 2015

Debt Disclosure [Abstract]

Borrowings

BORROWINGS

Following is a summary of short-term borrowings:

	March 31, 2015		December 31, 2014
Securities sold under repurchase agreements	$	757,279	$	882,696
Federal Home Loan Bank advances		500,000		820,000
Federal funds purchased		355,000		210,000
Subordinated notes		128,221		128,962
	$	1,740,500	$	2,041,658

Securities sold under repurchase agreements is comprised of customer repurchase agreements, which are sweep accounts with next day maturities utilized by larger commercial customers to earn interest on their funds. Securities are pledged to these customers in an amount equal to the outstanding balance.

Following is a summary of long-term borrowings:

	March 31, 2015		December 31, 2014
Federal Home Loan Bank advances	$	400,018	$	400,042
Subordinated notes		83,197		83,155
Junior subordinated debt		58,259		58,246
	$	541,474	$	541,443

The Corporation’s banking affiliate has available credit with the FHLB of $4,213,966 of which $900,018 was used as of March 31, 2015. These advances are secured by loans collateralized by residential mortgages, HELOCs, commercial real estate and FHLB stock and are scheduled to mature in various amounts periodically through the year 2021. Effective interest rates paid on the long-term advances ranged from 0.76% to 4.19% for both the three months ended March 31, 2015 and the year ended December 31, 2014.

The Corporation had two unconsolidated subsidiary trusts as of March 31, 2015 (collectively, the Trusts): F.N.B. Statutory Trust II and Omega Financial Capital Trust I. One hundred percent of the common equity of each Trust is owned by the Corporation. The Trusts were formed for the purpose of issuing Corporation-obligated mandatorily redeemable capital securities (TPS) to third-party investors. The proceeds from the sale of TPS and the issuance of common equity by the Trusts were invested in junior subordinated debt securities (subordinated debt) issued by the Corporation, which are the sole assets of each Trust. Since third-party investors are the primary beneficiaries, the Trusts are not consolidated in the Corporation’s financial statements. The Trusts pay dividends on the TPS at the same rate as the distributions paid by the Corporation on the junior subordinated debt held by the Trusts. Omega Financial Capital Trust I was assumed as a result of an acquisition.

Distributions on the subordinated debt issued to the Trusts are recorded as interest expense by the Corporation. The TPS are subject to mandatory redemption, in whole or in part, upon repayment of the subordinated debt. The TPS are eligible for redemption, at any time, at the Corporation’s discretion. Under recently issued capital guidelines, effective January 1, 2015, the portion of the subordinated debt, net of the Corporation’s investments in the Trusts, that qualifies as tier 1 capital is limited to 25% of the total $57,500 outstanding at March 31, 2015, with the remaining 75% moving to tier 2 capital. In 2016, the entire balance of the subordinated debt will be included in tier 2 capital. The Corporation has entered into agreements which, when taken collectively, fully and unconditionally guarantee the obligations under the TPS subject to the terms of each of the guarantees.

The following table provides information relating to the Trusts as of March 31, 2015:

	Trust Preferred Securities		Common Securities		Junior Subordinated Debt		Stated Maturity Date		Interest Rate
F.N.B. Statutory Trust II	$	21,500	$	665	$	22,165		6/15/36		1.92	%	Variable; LIBOR + 165 basis points (bps)
Omega Financial Capital Trust I		36,000		1,114		36,094		10/18/34		2.44	%	Variable; LIBOR + 219 bps
	$	57,500	$	1,779	$	58,259

XML

Business Segments - Financial Information for Segments of Corporation (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Segment Reporting Information [Line Items]
Interest income	$ 133,369	$ 117,880
Interest expense	11,448	10,055
Net interest income	121,921	107,825
Provision for credit losses	8,136	7,006
Non-interest income	38,182	42,070
Non-interest expense	92,540	91,883
Intangible amortization	2,115	2,283
Income tax expense (benefit)	16,969	14,199
Net income (loss)	40,343	34,524
Total assets	16,278,848	14,476,510	16,127,090
Total intangibles	875,246	856,812
Operating Segments [Member] | Community Banking [Member]
Segment Reporting Information [Line Items]
Interest income	122,118	106,691
Interest expense	9,941	8,248
Net interest income	112,177	98,443
Provision for credit losses	6,327	5,296
Non-interest income	27,301	31,913
Non-interest expense	77,079	76,866
Intangible amortization	1,947	2,110
Income tax expense (benefit)	15,931	13,343
Net income (loss)	38,194	32,741
Total assets	16,100,851	14,299,543
Total intangibles	852,764	833,642
Operating Segments [Member] | Wealth Management [Member]
Segment Reporting Information [Line Items]
Non-interest income	8,387	7,323
Non-interest expense	6,493	6,292
Intangible amortization	68	72
Income tax expense (benefit)	658	351
Net income (loss)	1,168	608
Total assets	21,125	19,542
Total intangibles	10,652	10,936
Operating Segments [Member] | Insurance [Member]
Segment Reporting Information [Line Items]
Interest income	23	25
Net interest income	23	25
Non-interest income	3,593	4,210
Non-interest expense	4,170	3,046
Intangible amortization	100	101
Income tax expense (benefit)	(226)	385
Net income (loss)	(428)	703
Total assets	18,464	19,954
Total intangibles	10,021	10,425
Operating Segments [Member] | Consumer Finance [Member]
Segment Reporting Information [Line Items]
Interest income	9,593	9,365
Interest expense	860	846
Net interest income	8,733	8,519
Provision for credit losses	1,574	1,457
Non-interest income	676	660
Non-interest expense	4,808	4,937
Income tax expense (benefit)	1,149	1,073
Net income (loss)	1,878	1,712
Total assets	182,662	182,018
Total intangibles	1,809	1,809
Parent and Other [Member]
Segment Reporting Information [Line Items]
Interest income	1,635	1,799
Interest expense	647	961
Net interest income	988	838
Provision for credit losses	235	253
Non-interest income	(1,775)	(2,036)
Non-interest expense	(10)	742
Income tax expense (benefit)	(543)	(953)
Net income (loss)	(469)	(1,240)
Total assets	$ (44,254)	$ (44,547)

XML

Cash Flow Information - Summary of Supplemental Cash Flow Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Statement of Cash Flows [Abstract]
Interest paid on deposits and other borrowings	$ 11,626	$ 10,576
Income taxes paid	0	0
Transfers of loans to other real estate owned	1,965	4,849
Financing of other real estate owned sold	$ 166

XML

Document and Entity Information	3 Months Ended
	Mar. 31, 2015	Apr. 30, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Trading Symbol	FNB
Entity Registrant Name	FNB CORP/FL/
Entity Central Index Key	0000037808
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		174,693,549

XML

Derivative And Hedging Activities

3 Months Ended

Mar. 31, 2015

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative And Hedging Activities

DERIVATIVE AND HEDGING ACTIVITIES

The Corporation is exposed to certain risks arising from both its business operations and economic conditions. The Corporation principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Corporation manages economic risks, including interest rate risk, primarily by managing the amount, source, and duration of its assets and liabilities, and through the use of derivative instruments. Derivative instruments are used to reduce the effects that changes in interest rates may have on net income and cash flows. The Corporation also uses derivative instruments to facilitate transactions on behalf of its customers.

All derivatives are carried on the consolidated balance sheet at fair value and do not take into account the effects of master netting arrangements the Corporation has with other financial institutions. Credit risk is included in the determination of the estimated fair value of derivatives. Derivative assets are classified in the consolidated balance sheet under other assets and derivative liabilities are classified in the consolidated balance sheet under other liabilities. Changes in fair value are recognized in earnings except for certain changes related to derivative instruments designated as part of a cash flow hedging relationship.

The following table presents notional amounts and gross fair values of all derivative assets and derivative liabilities held by the Corporation:

	March 31, 2015						December 31, 2014
	Notional		Fair Value				Notional		Fair Value
	Amount		Asset		Liability		Amount		Asset		Liability
Gross Derivatives
Subject to master netting arrangements:
Interest rate contracts – designated	$	200,000	$	3,937	$	669	$	200,000	$	2,109	$	2,330
Interest rate swaps – not designated		1,020,957		6		53,718		972,002		140		43,655
Equity contracts – not designated		1,210		39		—		1,210		47		—
Total subject to master netting arrangements		1,222,167		3,982		54,387		1,173,212		2,296		45,985
Not subject to master netting arrangements:
Interest rate swaps – not designated		1,020,957		53,569		5		972,002		43,602		128
Credit risk contracts – not designated		76,416		—		—		68,632		—		—
Equity contracts – not designated		1,210		—		39		1,210		—		47
Total not subject to master netting arrangements		1,098,583		53,569		44		1,041,844		43,602		175
	$	2,320,750	$	57,551	$	54,431	$	2,215,056	$	45,898	$	46,160

Derivatives Designated as Hedging Instruments under GAAP

Interest Rate Contracts. The Corporation entered into interest rate derivative agreements to modify the interest rate characteristics of designated commercial loans from variable rate to fixed rate in order to reduce the impact of changes in future cash flows due to market interest rate changes. These agreements are designated as cash flow hedges (i.e., hedging the exposure to variability in expected future cash flows). The effective portion of the derivative’s gain or loss is initially reported as a component of other comprehensive income and subsequently reclassified into earnings in the same line item associated with the forecasted transaction when the forecasted transaction affects earnings. The ineffective portion of the gain or loss is reported in earnings immediately.

At March 31, 2015 and December 31, 2014, the notional amount of these interest rate derivative agreements totaled $200,000. Fair values included in other assets and other liabilities on the consolidated balance sheet applicable to these agreements amounted to $3,937 and $669, respectively, at March 31, 2015, and $2,109 and $2,330, respectively, at December 31, 2014. For the three months ended March 31, 2015, the amount reclassified from accumulated other comprehensive income (AOCI) to interest income on loans and leases totaled $810 ($526 net of tax).

As of March 31, 2015, the maximum length of time over which forecasted interest cash flows are hedged is nine years. In the twelve months that follow March 31, 2015, the Corporation expects to reclassify from the amount currently reported in AOCI net derivative gains of $2,929 ($1,904 net of tax), in association with interest received on the hedged loans. This amount could differ from amounts actually recognized due to changes in interest rates, hedge de-designations, and the addition of other hedges subsequent to March 31, 2015.

There were no components of derivative gains or losses excluded from the assessment of hedge effectiveness related to these cash flow hedges. For the three months ended March 31, 2015 and 2014, there was no hedge ineffectiveness. Also, during the three months ended March 31, 2015 and 2014, there were no gains or losses from cash flow hedge derivatives reclassified to earnings because it became probable that the original forecasted transactions would not occur.

Derivatives Not Designated as Hedging Instruments under GAAP

Interest Rate Swaps. The Corporation enters into interest rate swap agreements to meet the financing, interest rate and equity risk management needs of qualifying commercial loan customers. These agreements provide the customer the ability to convert from variable to fixed interest rates. The credit risk associated with derivatives executed with customers is essentially the same as that involved in extending loans and is subject to normal credit policies and monitoring. Swap derivative transactions with customers are not subject to enforceable master netting arrangements and are generally secured by rights to non-financial collateral, such as real and personal property.

The Corporation enters into positions with a derivative counterparty in order to offset its exposure on the fixed components of the customer interest rate swap agreements. The Corporation seeks to minimize counterparty credit risk by entering into transactions with only high-quality financial dealer institutions. These arrangements meet the definition of derivatives, but are not designated as hedging instruments under ASC 815, Derivatives and Hedging. Substantially all contracts with dealers that require central clearing (generally, transactions since June 10, 2014) are novated to a SEC registered clearing agency who becomes the Corporation’s counterparty.

The notional amount of these customer derivative agreements and the offsetting derivative counterparty positions each totaled $1,020,957 at March 31, 2015. Fair values included in other assets and other liabilities on the consolidated balance sheet applicable to these agreements amounted to $53,575 and $53,723, respectively, at March 31, 2015. At December 31, 2014, the notional amount of these customer derivative agreements and the offsetting derivative counterparty positions each totaled $972,002. At December 31, 2014, fair values included in other assets and other liabilities on the consolidated balance sheet amounted to $43,742 and $43,783, respectively.

The interest rate swap agreement with the loan customer and with the counterparty is reported at fair value in other assets and other liabilities on the consolidated balance sheet with any resulting gain or loss recorded in current period earnings as other income or other expense.

Credit Risk Contracts. The Corporation purchases and sells credit protection under risk participation agreements to share with other counterparties some of the credit exposure related to interest rate derivative contracts or to take on credit exposure to generate revenue. The Corporation will make/receive payments under these agreements if a customer defaults on its obligation to perform under certain derivative swap contracts.

Risk participation agreements sold with notional amounts totaling $50,061 have remaining terms ranging from two to nine years. Under these agreements, the Corporation’s maximum exposure assuming a customer defaults on its obligation to perform under certain derivative swap contracts with third parties would be $70 at March 31, 2015 and $21 at December 31, 2014.

The fair values of risk participation agreements purchased and sold were not material at March 31, 2015 and December 31, 2014.

Counterparty Credit Risk

The Corporation is party to master netting arrangements with most of its swap derivative counterparties. Collateral, usually marketable securities and/or cash, is exchanged between the Corporation and its counterparties, and is generally subject to thresholds and transfer minimums. For swap transactions that require central clearing, the Corporation posts cash to its clearing agency. Collateral positions are valued daily, and adjustments to amounts received and pledged by the Corporation are made as appropriate to maintain proper collateralization for these transactions.

Certain master netting agreements contain provisions that, if violated, could cause the counterparties to request immediate settlement or demand full collateralization under the derivative instrument. If the Corporation had breached its agreements with its derivative counterparties it would be required to settle its obligations under the agreements at the termination value and would be required to pay an additional $2,071 and $1,862 as of March 31, 2015 and December 31, 2014, respectively, in excess of amounts previously posted as collateral with the respective counterparty.

The following table presents information about derivative assets and derivative liabilities that are subject to enforceable master netting arrangements as well as those not subject to enforceable master netting arrangements:

	Gross Amount		Gross Amounts Offset in the Balance Sheet		Net Amount Presented in the Balance Sheet
March 31, 2015
Derivative Assets
Subject to master netting arrangements:
Interest rate contracts
Designated	$	3,937		—	$	3,937
Not designated		6		—		6
Equity contracts – not designated		39		—		39
Not subject to master netting arrangements:
Interest rate contracts – not designated		53,569		—		53,569
	$	57,551		—	$	57,551
Derivative Liabilities
Subject to master netting arrangements:
Interest rate contracts
Designated	$	669		—	$	669
Not designated		53,718		—		53,718
Not subject to master netting arrangements:
Interest rate contracts – not designated		5		—		5
Equity contracts – not designated		39		—		39
	$	54,431		—	$	54,431
December 31, 2014
Derivative Assets
Subject to master netting arrangements:
Interest rate contracts
Designated	$	2,109		—	$	2,109
Not designated		140		—		140
Equity contracts – not designated		47		—		47
Not subject to master netting arrangements:
Interest rate contracts – not designated		43,602		—		43,602
	$	45,898		—	$	45,898
Derivative Liabilities
Subject to master netting arrangements:
Interest rate contracts
Designated	$	2,330		—	$	2,330
Not designated		43,655		—		43,655
Not subject to master netting arrangements:
Interest rate contracts – not designated		128		—		128
Equity contracts – not designated		47		—		47
	$	46,160		—	$	46,160

The following table presents a reconciliation of the net amounts of derivative assets and derivative liabilities presented in the balance sheet to the net amounts that would result in the event of offset:

	Net Amount Presented in		Amount Not Offset in the Balance Sheet
	the Balance Sheet		Financial Instruments		Cash Collateral		Net Amount
March 31, 2015
Derivative Assets
Interest rate contracts:
Designated	$	3,937	$	1,902	$	2,035		—
Not designated		6		6		—		—
Equity contracts – not designated		39		39		—		—
	$	3,982	$	1,947	$	2,035		—
Derivative Liabilities
Interest rate contracts:
Designated	$	669	$	669	$	—	$	—
Not designated		53,718		30,626		21,346		1,746
	$	54,387	$	31,295	$	21,346	$	1,746
December 31, 2014
Derivative Assets
Interest rate contracts:
Designated	$	2,109	$	810	$	1,299		—
Not designated		140		138		2		—
Equity contracts – not designated		47		47		—		—
	$	2,296	$	995	$	1,301		—
Derivative Liabilities
Interest rate contracts:
Designated	$	2,330	$	2,330	$	—	$	—
Not designated		43,655		28,646		13,243		1,766
	$	45,985	$	30,976	$	13,243	$	1,766

The following table presents the effect of the Corporation’s derivative financial instruments on the income statement:

	Income		Three Months Ended
	Statement		March 31,
	Location		2015			2014
Interest Rate Products		Other income	$	(107	)	$	(14	)

Other

The Corporation has entered into interest rate lock commitments to originate residential mortgage loans held for sale and forward commitments to sell residential mortgage loans to secondary market investors. These arrangements are considered derivative instruments. The fair values of the Corporation’s rate lock commitments to customers and commitments with investors at March 31, 2015 and December 31, 2014 are not material.

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Stock Incentive Plans - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Jun. 16, 2009	Apr. 06, 2013	Jan. 01, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards issued	0	0
Common stock shares available under incentive compensation plans	2,122,522
Unrecognized compensation cost related to unvested restricted stock awards	$ 4,509
Stock options exercised	60,094	87,332
Intrinsic value of outstanding and exercisable stock options	1,890
Common shares available for purchase under warrants			651,042
Parkvale Financial Corporation [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrant issued	819,640
Annapolis Bancorp, Inc. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrant issued, exercise price	$ 3.32
Warrant issued	342,564
Warrants converted to purchase common stock	367,916
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense related to restricted stock awards	340	532
Tax benefit related to restricted stock awards	119	186
Total fair value of awards vested	5,740	8,631
Unrecognized compensation cost related to unvested restricted stock awards	4,509
Amount subject to accelerated vesting under Incentive Compensation Plan	20
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options exercised	60,094	59,217
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares available for purchase under warrants	1,302,083
Warrant Expires In 2019 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrant issued, exercise price	$ 11.52
Warrant Expires In 2019 [Member] | Annapolis Bancorp, Inc. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrant issued, exercise price				$ 3.57
Service-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of awards issued, years	3 years
Unrecognized compensation cost related to unvested restricted stock awards	2,659
Performance-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of awards issued, years	3 years
Unrecognized compensation cost related to unvested restricted stock awards	$ 1,850
Warrant Expires in 2018 [Member] | Parkvale Financial Corporation [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrant issued, exercise price					$ 5.81
Market Based Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock percentage of number of units issued	100.00%

XML

Earnings Per Share - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share [Abstract]
Common stock excluded from computation of diluted earnings per share	24,272	51,641

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Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Interest Income
Loans and leases, including fees	$ 117,739	$ 104,097
Securities:
Taxable	14,214	12,287
Nontaxable	1,373	1,291
Dividends	11	179
Other	32	26
Total Interest Income	133,369	117,880
Interest Expense
Deposits	7,449	7,149
Short-term borrowings	1,768	1,219
Long-term borrowings	2,231	1,687
Total Interest Expense	11,448	10,055
Net Interest Income	121,921	107,825
Provision for credit losses	8,136	7,006
Net Interest Income After Provision for Credit Losses	113,785	100,819
Non-Interest Income
Service charges	15,817	15,269
Trust fees	5,161	4,764
Insurance commissions and fees	4,369	4,945
Securities commissions and fees	3,057	2,391
Net securities (losses) gains	(9)	9,461
Mortgage banking operations	1,799	214
Bank owned life insurance	1,843	2,185
Other	6,145	2,841
Total Non-Interest Income	38,182	42,070
Non-Interest Expense
Salaries and employee benefits	49,269	48,953
Net occupancy	8,976	8,482
Equipment	7,648	6,899
Amortization of intangibles	2,115	2,283
Outside services	8,777	7,237
FDIC insurance	3,689	2,994
Merger related		5,318
Other	14,181	12,000
Total Non-Interest Expense	94,655	94,166
Income Before Income Taxes	57,312	48,723
Income taxes	16,969	14,199
Net Income	40,343	34,524
Less: Preferred stock dividends	2,010	2,322
Net Income Available to Common Stockholders	38,333	32,202
Net Income per Common Share - Basic	$ 0.22	$ 0.20
Net Income per Common Share - Diluted	$ 0.22	$ 0.20
Cash Dividends per Common Share	$ 0.12	$ 0.12
Comprehensive income	$ 51,366	$ 47,407

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New Accounting Standards

3 Months Ended

Mar. 31, 2015

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

New Accounting Standards

NEW ACCOUNTING STANDARDS

Cloud Computing Arrangements

In April 2015, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2015-05, Intangibles-Goodwill and Other-Internal-Use Software. ASU 2015-05 provides guidance to help entities evaluate the accounting for fees paid by a customer in a cloud computing arrangement environment. The amendments in this Update provide a basis for evaluating whether a cloud computing arrangement includes a software license to internal-use software, and how to account for the software license element of the arrangement. This update supersedes the existing requirement to analogize to operating lease guidance in accounting for some software licenses. The requirements of ASU 2015-05 are effective for reporting periods beginning after December 15, 2015, with early adoption permitted. A reporting entity may apply ASU 2015-05 either prospectively or retrospectively. The Corporation is evaluating this new guidance and has not yet determined which approach it will adopt to apply the amendments in ASU 2015-05 or the impact that the adoption of this update will have on its financial statements.

Consolidation

In February 2015, the FASB issued ASU No. 2015-02, Consolidation. ASU 2015-02 changes the analysis that a reporting entity must perform to determine whether it should consolidate certain types of legal entities. This update modifies the evaluation of whether limited partnerships or similar legal entities are variable interest entities (VIEs) or voting interest entities, eliminates the presumption that a general partner should consolidate a limited partnership and affects the consolidation analysis of reporting entities that are involved with VIEs, particularly those that have fee arrangements and related party relationships. The requirements of ASU 2015-02 are effective for reporting periods beginning after December 15, 2015, with early adoption permitted. A reporting entity may apply ASU 2015-02 either retrospectively or by using a modified retrospective approach by recording a cumulative-effect adjustment to equity as of the beginning of the fiscal year of adoption. The adoption of this update is not expected to have a material effect on the financial statements, results of operations or liquidity of the Corporation.

Income Statement

In January 2015, the FASB issued ASU No. 2015-01, Income Statement – Extraordinary and Unusual Items. The FASB issued ASU 2015-01 as part of its Simplification Initiative to reduce complexity in accounting standards. ASU 2015-01 eliminates from GAAP the concept of extraordinary items. The requirements of ASU 2015-01 are effective for reporting periods beginning after December 15, 2015, with early adoption permitted. A reporting entity may apply ASU 2015-01 prospectively, or retrospectively to all prior periods presented in the financial statements. The adoption of this update will not have an effect on the financial statements, results of operations or liquidity of the Corporation, as the Corporation has not reported extraordinary items.

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Mergers and Acquisitions

3 Months Ended

Mar. 31, 2015

Business Combinations [Abstract]

Mergers and Acquisitions

MERGERS AND ACQUISITIONS

OBA Financial Services, Inc.

On September 19, 2014, the Corporation completed its acquisition of OBA Financial Services, Inc. (OBA), a bank holding company based in Germantown, Maryland. On the acquisition date, the estimated fair values of OBA included $390,128 in assets, $291,393 in loans and $295,922 in deposits. The acquisition was valued at approximately $85,554 and resulted in the Corporation issuing 7,170,037 shares of its common stock in exchange for 4,025,895 shares of OBA common stock. The Corporation also acquired the outstanding stock options of OBA that became fully vested upon the acquisition. The assets and liabilities of OBA were recorded on the Corporation’s consolidated balance sheet at their preliminary estimated fair values as of September 19, 2014, the acquisition date, and OBA’s results of operations have been included in the Corporation’s consolidated statement of comprehensive income since that date. OBA’s banking affiliate, OBA Bank, was merged into FNBPA on September 19, 2014. Based on a preliminary purchase price allocation, the Corporation recorded $20,139 in goodwill and $4,304 in core deposit intangibles as a result of the acquisition. These fair value estimates are provisional amounts based on third party valuations that are currently under review. None of the goodwill is deductible for income tax purposes.

BCSB Bancorp, Inc.

On February 15, 2014, the Corporation completed its acquisition of BCSB Bancorp, Inc. (BCSB), a bank holding company based in Baltimore, Maryland. On the acquisition date, the estimated fair values of BCSB included $596,122 in assets, $304,932 in loans and $532,197 in deposits. The acquisition was valued at $80,547 and resulted in the Corporation issuing 6,730,597 shares of its common stock in exchange for 3,235,961 shares of BCSB common stock. The Corporation also acquired the outstanding stock options of BCSB that became fully vested upon the acquisition. The assets and liabilities of BCSB were recorded on the Corporation’s consolidated balance sheet at their fair values as of February 15, 2014, the acquisition date, and BCSB’s results of operations have been included in the Corporation’s consolidated statement of comprehensive income since that date. BCSB’s banking affiliate, Baltimore County Savings Bank, was merged into FNBPA on February 15, 2014. Based on the purchase price allocation, the Corporation recorded $42,451 in goodwill and $6,591 in core deposit intangibles as a result of the acquisition. None of the goodwill is deductible for income tax purposes.

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Comprehensive Income

3 Months Ended

Mar. 31, 2015

Equity [Abstract]

Comprehensive Income

COMPREHENSIVE INCOME

The components of comprehensive income, net of related tax, are as follows:

	Three Months Ended
	March 31,
	2015			2014
Net income	$	40,343		$	34,524
Other comprehensive income:
Securities available for sale:
Unrealized gains arising during the period, net of tax expense of $4,523 and $9,016		8,400			16,742
Reclassification adjustment for losses (gains) included in net income, net of tax (benefit) expense of $(3) and $3,311		6			(6,150	)
Derivative instruments:
Unrealized gains arising during the period, net of tax expense of $1,504 and $1,402		2,793			2,603
Reclassification adjustment for gains included in net income, net of tax expense of $283 and $285		(526	)		(529	)
Pension and postretirement benefit obligations:
Unrealized gains arising during the period, net of tax expense of $189 and $117		350			217
Other comprehensive income		11,023			12,883
Comprehensive income	$	51,366		$	47,407

The amounts reclassified from AOCI related to securities available for sale are included in net securities (losses) gains on the Consolidated Statements of Comprehensive Income, while the amounts reclassified from AOCI related to derivative instruments are included in interest income on loans and leases on the Consolidated Statements of Comprehensive Income.

The tax (benefit) expense amounts reclassified from AOCI in connection with the securities available for sale and derivative instruments reclassifications are included in income tax provision on the Consolidated Statements of Comprehensive Income.

The following table presents changes in AOCI, net of tax, by component:

	Unrealized Net Gains (Losses) on Securities Available for Sale			Unrealized Net Gains (Losses) on Derivative Instruments			Unrecognized Pension and Postretirement Obligations			Total
Three Months Ended March 31, 2015
Balance at beginning of period	$	(440	)	$	(143	)	$	(45,420	)	$	(46,003	)
Other comprehensive income before reclassifications		8,400			2,793			350			11,543
Amounts reclassified from AOCI		6			(526	)		—			(520	)
Net current period other comprehensive income		8,406			2,267			350			11,023
Balance at end of period	$	7,966		$	2,124		$	(45,070	)	$	(34,980	)

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Commitments, Credit Risk and Contingencies

3 Months Ended

Mar. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Commitments, Credit Risk and Contingencies

COMMITMENTS, CREDIT RISK AND CONTINGENCIES

The Corporation has commitments to extend credit and standby letters of credit that involve certain elements of credit risk in excess of the amount stated in the consolidated balance sheet. The Corporation’s exposure to credit loss in the event of non-performance by the customer is represented by the contractual amount of those instruments. The credit risk associated with loan commitments and standby letters of credit is essentially the same as that involved in extending loans and leases to customers and is subject to normal credit policies. Since many of these commitments expire without being drawn upon, the total commitment amounts do not necessarily represent future cash flow requirements.

Following is a summary of off-balance sheet credit risk information:

	March 31, 2015		December 31, 2014
Commitments to extend credit	$	3,969,614	$	3,665,481
Standby letters of credit		109,355		121,186

At March 31, 2015, funding of 68.2% of the commitments to extend credit was dependent on the financial condition of the customer. The Corporation has the ability to withdraw such commitments at its discretion. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Based on management’s credit evaluation of the customer, collateral may be deemed necessary. Collateral requirements vary and may include accounts receivable, inventory, property, plant and equipment and income-producing commercial properties.

Standby letters of credit are conditional commitments issued by the Corporation that may require payment at a future date. The credit risk involved in issuing letters of credit is quantified on a quarterly basis, through the review of historical performance of the Corporation’s portfolios and allocated as a liability on the Corporation’s balance sheet.

Other Legal Proceedings

The Corporation and its subsidiaries are involved in various pending legal proceedings in which claims for monetary damages and other relief are asserted. These actions include claims brought against the Corporation and its subsidiaries where the Corporation or a subsidiary acted as one or more of the following: a depository bank, lender, underwriter, fiduciary, financial advisor, broker, agent, acquiror or was engaged in other business activities. Although the ultimate outcome for any asserted claim cannot be predicted with certainty, the Corporation believes that it and its subsidiaries have valid defenses for all asserted claims. Reserves are established for legal claims when losses associated with the claims are judged to be probable and the amount of the loss can be reasonably estimated.

Based on information currently available, advice of counsel, available insurance coverage and established reserves, the Corporation does not anticipate, at the present time, that the aggregate liability, if any, arising out of such legal proceedings will have a material adverse effect on the Corporation’s consolidated financial position. However, the Corporation cannot determine whether or not any claims asserted against it will have a material adverse effect on its consolidated results of operations in any future reporting period.

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Retirement Plans - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2015 RetirementPlans	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2008
Disclosure Retirement Plans [Abstract]
Number of supplemental non-qualified retirement plans sponsored by the Corporation	2
Consecutive calendar years used to calculate BRP benefits				5 years
Term of employment for consideration of BRP				10 years
Annuity equivalent of contribution to defined contribution plan deducted from monthly benefit of basic retirement plan	3.00%
Percent of employer match	100.00%		100.00%
Employee contribution percentage	6.00%		4.00%
Additional automatic contribution increase, percentage			3.00%
Additional discretionary contribution, performance goals, percentage	3.00%		2.00%
Contribution expense of the Corporation	$ 2,167	$ 2,570

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Loans and Leases

3 Months Ended

Mar. 31, 2015

Receivables [Abstract]

Loans and Leases

LOANS AND LEASES

Following is a summary of loans and leases, net of unearned income:

	Originated Loans		Acquired Loans		Total Loans and Leases
March 31, 2015
Commercial real estate	$	3,082,385	$	734,804	$	3,817,189
Commercial and industrial		2,281,075		116,656		2,397,731
Commercial leases		180,207		—		180,207
Total commercial loans and leases		5,543,667		851,460		6,395,127
Direct installment		1,594,846		58,775		1,653,621
Residential mortgages		877,437		421,660		1,299,097
Indirect installment		903,780		1,424		905,204
Consumer lines of credit		953,569		154,849		1,108,418
Other		42,632		—		42,632
	$	9,915,931	$	1,488,168	$	11,404,099
December 31, 2014
Commercial real estate	$	3,031,810	$	783,898	$	3,815,708
Commercial and industrial		2,197,793		120,222		2,318,015
Commercial leases		177,824		—		177,824
Total commercial loans and leases		5,407,427		904,120		6,311,547
Direct installment		1,579,770		64,851		1,644,621
Residential mortgages		817,586		445,467		1,263,053
Indirect installment		873,645		1,906		875,551
Consumer lines of credit		946,427		164,549		1,110,976
Other		41,290		—		41,290
	$	9,666,145	$	1,580,893	$	11,247,038

Commercial real estate includes both owner-occupied and non-owner-occupied loans secured by commercial properties. Commercial and industrial includes loans to businesses that are not secured by real estate. Commercial leases are made for new or used equipment. Direct installment is comprised of fixed-rate, closed-end consumer loans for personal, family or household use, such as home equity loans and automobile loans. Residential mortgages consist of conventional and jumbo mortgage loans for non-commercial properties. Indirect installment is comprised of loans originated by third parties and underwritten by the Corporation, primarily automobile loans. Consumer lines of credit include home equity lines of credit (HELOC) and consumer lines of credit that are either unsecured or secured by collateral other than home equity. Other is comprised primarily of credit cards, mezzanine loans and student loans.

The loan and lease portfolio consists principally of loans to individuals and small- and medium-sized businesses within the Corporation’s primary market area of Pennsylvania, eastern Ohio, Maryland and northern West Virginia. The total loan portfolio contains consumer finance loans to individuals in Pennsylvania, Ohio, Tennessee and Kentucky, which totaled $174,239 or 1.5% of total loans and leases at March 31, 2015, compared to $180,588 or 1.6% of total loans and leases at December 31, 2014. Due to the relative size of the consumer finance loan portfolio, they are not segregated from other consumer loans.

As of March 31, 2015, 40.8% of the commercial real estate loans were owner-occupied, while the remaining 59.2% were non-owner-occupied, compared to 41.6% and 58.4%, respectively, as of December 31, 2014. As of March 31, 2015 and December 31, 2014, the Corporation had commercial construction loans of $227,179 and $296,156, respectively, representing 2.0% and 2.6% of total loans and leases at those respective dates.

Acquired Loans

All acquired loans were initially recorded at fair value at the acquisition date. The outstanding balance and the carrying amount of acquired loans included in the consolidated balance sheet are as follows:

	March 31, 2015		December 31, 2014
Accounted for under ASC 310-30:
Outstanding balance	$	1,513,616	$	1,597,558
Carrying amount		1,259,995		1,344,171
Accounted for under ASC 310-20:
Outstanding balance		232,524		242,488
Carrying amount		220,921		228,748
Total acquired loans:
Outstanding balance		1,746,140		1,840,046
Carrying amount		1,480,916		1,572,919

The carrying amount of purchased credit impaired loans included in the table above totaled $7,100 at March 31, 2015 and $9,556 at December 31, 2014, representing less than 1% of the carrying amount of total acquired loans as of each date.

The following table provides changes in accretable yield for all acquired loans accounted for under ASC 310-30. Loans accounted for under ASC 310-20 are not included in this table.

	Three Months Ended
	March 31,
	2015			2014
Balance at beginning of period	$	331,899		$	305,646
Reduction due to unexpected early payoffs		(11,909	)		(12,694	)
Reclass from non-accretable difference		7,676			768
Disposals/transfers		(118	)		(944	)
Accretion		(16,264	)		(15,913	)
Balance at end of period	$	311,284		$	276,863

Credit Quality

Management monitors the credit quality of the Corporation’s loan and lease portfolio on an ongoing basis. Measurement of delinquency and past due status is based on the contractual terms of each loan.

Non-performing loans include non-accrual loans and non-performing troubled debt restructurings (TDRs). Past due loans are reviewed on a monthly basis to identify loans for non-accrual status. The Corporation places a loan on non-accrual status and discontinues interest accruals on originated loans generally when principal or interest is due and has remained unpaid for a certain number of days unless the loan is both well secured and in the process of collection. Commercial loans are placed on non-accrual at 90 days, installment loans are placed on non-accrual at 120 days and residential mortgages and consumer lines of credit are generally placed on non-accrual at 180 days. When a loan is placed on non-accrual status, all unpaid interest is reversed. Non-accrual loans may not be restored to accrual status until all delinquent principal and interest have been paid and the ultimate ability to collect the remaining principal and interest is reasonably assured. TDRs are loans in which the borrower has been granted a concession on the interest rate or the original repayment terms due to financial distress.

Following is a summary of non-performing assets:

	March 31, 2015			December 31, 2014
Non-accrual loans	$	45,029		$	45,113
Troubled debt restructurings		22,022			23,439
Total non-performing loans		67,051			68,552
Other real estate owned (OREO)		40,796			41,466
Total non-performing assets	$	107,847		$	110,018
Asset quality ratios:
Non-performing loans as a percent of total loans and leases		0.59	%		0.61	%
Non-performing loans + OREO as a percent of total loans and leases + OREO		0.94	%		0.97	%
Non-performing assets as a percent of total assets		0.66	%		0.68	%

The carrying value of residential OREO held as a result of obtaining physical possession upon completion of a foreclosure or through completion of a deed in lieu of foreclosure amounted to $3,541 at March 31, 2015. Also, the recorded investment of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process at March 31, 2015 amounted to $14,186.

The following tables provide an analysis of the aging of the Corporation’s past due loans by class, segregated by loans and leases originated and loans acquired:

	30-89 Days Past Due		> 90 Days Past Due and Still Accruing		Non-Accrual		Total Past Due		Current		Total Loans and Leases
Originated Loans and Leases
March 31, 2015
Commercial real estate	$	6,655	$	130	$	23,653	$	30,438	$	3,051,947	$	3,082,385
Commercial and industrial		2,939		3		8,846		11,788		2,269,287		2,281,075
Commercial leases		1,097		—		732		1,829		178,378		180,207
Total commercial loans and leases		10,691		133		33,231		44,055		5,499,612		5,543,667
Direct installment		8,748		3,575		6,464		18,787		1,576,059		1,594,846
Residential mortgages		7,040		1,731		3,625		12,396		865,041		877,437
Indirect installment		5,015		409		1,111		6,535		897,245		903,780
Consumer lines of credit		2,501		656		598		3,755		949,814		953,569
Other		47		39		—		86		42,546		42,632
	$	34,042	$	6,543	$	45,029	$	85,614	$	9,830,317	$	9,915,931
December 31, 2014
Commercial real estate	$	9,601	$	313	$	24,132	$	34,046	$	2,997,764	$	3,031,810
Commercial and industrial		2,446		3		8,310		10,759		2,187,034		2,197,793
Commercial leases		961		43		722		1,726		176,098		177,824
Total commercial loans and leases		13,008		359		33,164		46,531		5,360,896		5,407,427
Direct installment		9,333		3,617		7,117		20,067		1,559,703		1,579,770
Residential mortgages		8,709		3,891		2,964		15,564		802,022		817,586
Indirect installment		7,804		684		1,149		9,637		864,008		873,645
Consumer lines of credit		2,408		562		719		3,689		942,738		946,427
Other		13		135		—		148		41,142		41,290
	$	41,275	$	9,248	$	45,113	$	95,636	$	9,570,509	$	9,666,145

	30-89 Days Past Due		> 90 Days Past Due and Still Accruing		Total Past Due (1) (2)		Current		Discount			Total Loans
Acquired Loans
March 31, 2015
Commercial real estate	$	8,813	$	12,445	$	21,258	$	753,073	$	(39,527	)	$	734,804
Commercial and industrial		1,023		1,651		2,674		122,604		(8,622	)		116,656
Total commercial loans		9,836		14,096		23,932		875,677		(48,149	)		851,460
Direct installment		1,199		1,112		2,311		55,476		988			58,775
Residential mortgages		7,695		18,535		26,230		434,061		(38,631	)		421,660
Indirect installment		9		17		26		1,648		(250	)		1,424
Consumer lines of credit		1,115		2,146		3,261		156,676		(5,088	)		154,849
	$	19,854	$	35,906	$	55,760	$	1,523,538	$	(91,130	)	$	1,488,168
December 31, 2014
Commercial real estate	$	12,076	$	12,368	$	24,444	$	799,991	$	(40,537	)	$	783,898
Commercial and industrial		687		1,968		2,655		127,535		(9,968	)		120,222
Total commercial loans		12,763		14,336		27,099		927,526		(50,505	)		904,120
Direct installment		2,670		1,443		4,113		59,532		1,206			64,851
Residential mortgages		8,159		19,936		28,095		456,810		(39,438	)		445,467
Indirect installment		38		30		68		2,179		(341	)		1,906
Consumer lines of credit		1,048		2,279		3,327		166,912		(5,690	)		164,549
	$	24,678	$	38,024	$	62,702	$	1,612,959	$	(94,768	)	$	1,580,893

(1) Past due information for acquired loans is based on the contractual balance outstanding at March 31, 2015 and December 31, 2014.

(2) Acquired loans are considered performing upon acquisition, regardless of whether the customer is contractually delinquent, if the Corporation can reasonably estimate the timing and amount of expected cash flows on such loans. Accordingly, the Corporation does not consider acquired contractually delinquent loans to be non-accrual or non-performing and continues to recognize interest income on these loans using the accretion method.

The Corporation utilizes the following categories to monitor credit quality within its commercial loan and lease portfolio:

Rating Category	Definition
Pass	in general, the condition and performance of the borrower is satisfactory or better
Special Mention	in general, the condition of the borrower has deteriorated, requiring an increased level of monitoring
Substandard	in general, the condition and performance of the borrower has significantly deteriorated and could further deteriorate if deficiencies are not corrected
Doubtful	in general, the condition of the borrower has significantly deteriorated and the collection in full of both principal and interest is highly questionable or improbable

The use of these internally assigned credit quality categories within the commercial loan and lease portfolio permits management’s use of transition matrices to estimate a quantitative portion of credit risk. The Corporation’s internal credit risk grading system is based on past experiences with similarly graded loans and leases and conforms with regulatory categories. In general, loan and lease risk ratings within each category are reviewed on an ongoing basis according to the Corporation’s policy for each class of loans and leases. Each quarter, management analyzes the resulting ratings, as well as other external statistics and factors such as delinquency, to track the migration performance of the commercial loan and lease portfolio. Loans and leases within the Pass credit category or that migrate toward the Pass credit category generally have a lower risk of loss compared to loans and leases that migrate toward the Substandard or Doubtful credit categories. Accordingly, management applies higher risk factors to Substandard and Doubtful credit categories.

The following tables present a summary of the Corporation’s commercial loans and leases by credit quality category, segregated by loans and leases originated and loans acquired:

	Commercial Loan and Lease Credit Quality Categories
	Pass		Special Mention		Substandard		Doubtful		Total
Originated Loans and Leases
March 31, 2015
Commercial real estate	$	2,960,542	$	52,926	$	68,182	$	735	$	3,082,385
Commercial and industrial		2,190,066		53,482		36,081		1,446		2,281,075
Commercial leases		177,091		2,222		894		—		180,207
	$	5,327,699	$	108,630	$	105,157	$	2,181	$	5,543,667
December 31, 2014
Commercial real estate	$	2,890,830	$	58,630	$	81,951	$	399	$	3,031,810
Commercial and industrial		2,085,893		71,420		39,684		796		2,197,793
Commercial leases		174,677		2,198		949		—		177,824
	$	5,151,400	$	132,248	$	122,584	$	1,195	$	5,407,427
Acquired Loans
March 31, 2015
Commercial real estate	$	579,462	$	64,892	$	90,450		—	$	734,804
Commercial and industrial		102,974		2,411		11,271		—		116,656
	$	682,436	$	67,303	$	101,721		—	$	851,460
December 31, 2014
Commercial real estate	$	610,260	$	73,891	$	99,747		—	$	783,898
Commercial and industrial		103,862		3,506		12,854		—		120,222
	$	714,122	$	77,397	$	112,601		—	$	904,120

Credit quality information for acquired loans is based on the contractual balance outstanding at March 31, 2015 and December 31, 2014.

The Corporation uses delinquency transition matrices within the consumer and other loan classes to enable management to estimate a quantitative portion of credit risk. Each month, management analyzes payment and volume activity, FICO scores and other external factors such as unemployment, to determine how consumer loans are performing.

Following is a table showing originated consumer loans by payment status:

	Consumer Loan Credit Quality by Payment Status
	Performing		Non-Performing		Total
March 31, 2015
Direct installment	$	1,581,078	$	13,768	$	1,594,846
Residential mortgages		862,965		14,472		877,437
Indirect installment		902,515		1,265		903,780
Consumer lines of credit		951,980		1,589		953,569
Other		42,632		—		42,632
December 31, 2014
Direct installment	$	1,565,090	$	14,680	$	1,579,770
Residential mortgages		802,522		15,064		817,586
Indirect installment		872,340		1,305		873,645
Consumer lines of credit		944,631		1,796		946,427
Other		41,290		—		41,290

Loans and leases are designated as impaired when, in the opinion of management, based on current information and events, the collection of principal and interest in accordance with the loan and lease contract is doubtful. Typically, the Corporation does not consider loans and leases for impairment unless a sustained period of delinquency (i.e., 90-plus days) is noted or there are subsequent events that impact repayment probability (i.e., negative financial trends, bankruptcy filings, imminent foreclosure proceedings, etc.). Impairment is evaluated in the aggregate for consumer installment loans, residential mortgages, consumer lines of credit and commercial loan and lease relationships less than $500 based on loan and lease segment loss given default. For commercial loan relationships greater than or equal to $500, a specific valuation allowance is allocated, if necessary, so that the loan is reported net, at the present value of estimated future cash flows using a market interest rate or at the fair value of collateral if repayment is expected solely from the collateral. Consistent with the Corporation’s existing method of income recognition for loans and leases, interest on impaired loans, except those classified as non-accrual, is recognized as income using the accrual method. Impaired loans, or portions thereof, are charged off when deemed uncollectible.

Following is a summary of information pertaining to originated loans and leases considered to be impaired, by class of loan and lease:

	Unpaid Contractual Principal Balance		Recorded Investment With No Specific Reserve		Recorded Investment With Specific Reserve		Total Recorded Investment		Specific Reserve		Average Recorded Investment
At or for the Three Months Ended March 31, 2015
Commercial real estate	$	34,483	$	25,015	$	1,012	$	26,027	$	735	$	26,176
Commercial and industrial		11,251		8,138		1,928		10,066		1,446		9,811
Commercial leases		732		732		—		732		—		727
Total commercial loans and leases		46,466		33,885		2,940		36,825		2,181		36,714
Direct installment		13,977		13,768		—		13,768		—		14,343
Residential mortgages		15,718		14,472		—		14,472		—		15,547
Indirect installment		1,425		1,265		—		1,265		—		1,363
Consumer lines of credit		1,600		1,589		—		1,589		—		1,696
Other		—		—		—		—		—		—
	$	79,186	$	64,979	$	2,940	$	67,919	$	2,181	$	69,663
At or for the Year Ended December 31, 2014
Commercial real estate	$	34,583	$	25,443	$	883	$	26,326	$	399	$	30,807
Commercial and industrial		11,412		7,609		1,948		9,557		780		9,510
Commercial leases		722		722		—		722		—		686
Total commercial loans and leases		46,717		33,774		2,831		36,605		1,179		41,003
Direct installment		14,987		14,680		—		14,680		—		14,248
Residential mortgages		16,791		15,064		—		15,064		—		16,924
Indirect installment		1,467		1,305		—		1,305		—		1,399
Consumer lines of credit		1,803		1,796		—		1,796		—		1,793
Other		—		—		—		—		—		—
	$	81,765	$	66,619	$	2,831	$	69,450	$	1,179	$	75,367

Interest income is generally no longer recognized once a loan becomes impaired.

These tables do not reflect the additional allowance for credit losses relating to acquired loans in the following pools and categories: commercial real estate of $3,327; commercial and industrial of $712; direct installment of $1,477; residential mortgages of $1,193; indirect installment of $229; and consumer lines of credit of $314, totaling $7,252 at March 31, 2015 and commercial real estate of $3,286; commercial and industrial of $1,484; direct installment of $1,847; residential mortgages of $858; indirect installment of $232; and consumer lines of credit of $267, totaling $7,974 at December 31, 2014.

Troubled Debt Restructurings

TDRs are loans whose contractual terms have been modified in a manner that grants a concession to a borrower experiencing financial difficulties. TDRs typically result from loss mitigation activities and could include the extension of a maturity date, interest rate reduction, principal forgiveness, deferral or decrease in payments for a period of time and other actions intended to minimize the economic loss and to avoid foreclosure or repossession of collateral.

Following is a summary of the payment status of total TDRs:

	March 31, 2015		December 31, 2014
Accruing:
Performing	$	12,793	$	9,441
Non-performing		22,022		23,439
Non-accrual		8,040		8,272
	$	42,855	$	41,152

TDRs that are accruing and performing include loans that met the criteria for non-accrual of interest prior to restructuring for which the Corporation can reasonably estimate the timing and amount of the expected cash flows on such loans and for which the Corporation expects to fully collect the new carrying value of the loans. During the three months ended March 31, 2015, the Corporation returned to performing status $3,975 in restructured residential mortgage loans that have consistently met their modified obligations for more than six months. TDRs that are accruing and non-performing are comprised of consumer loans that have not demonstrated a consistent repayment pattern on the modified terms for more than six months, however it is expected that the Corporation will collect all future principal and interest payments. TDRs that are on non-accrual are not placed on accruing status until all delinquent principal and interest have been paid and the ultimate collectability of the remaining principal and interest is reasonably assured. Some loan modifications classified as TDRs may not ultimately result in the full collection of principal and interest, as modified, and may result in potential incremental losses which are factored into the allowance for credit losses.

Excluding purchased impaired loans, commercial loans over $500 whose terms have been modified in a TDR are generally placed on non-accrual, individually analyzed and measured for estimated impairment based on the fair value of the underlying collateral. The Corporation’s allowance for credit losses included specific reserves for commercial TDRs of $646 and $371 at March 31, 2015 and December 31, 2014, respectively, and pooled reserves for individual loans under $500 of $1,203 and $1,215 for those same respective periods, based on loan segment loss given default. Upon default, the amount of the recorded investment in the TDR in excess of the fair value of the collateral, less estimated selling costs, is generally considered a confirmed loss and is charged-off against the allowance for credit losses.

All other classes of loans, which are primarily secured by residential properties, whose terms have been modified in a TDR are pooled and measured for estimated impairment based on the expected net present value of the estimated future cash flows of the pool. The Corporation’s allowance for credit losses included pooled reserves for these classes of loans of $4,146 and $3,448 at March 31, 2015 and December 31, 2014, respectively. Upon default of an individual loan, the Corporation’s charge-off policy is followed accordingly for that class of loan.

The majority of TDRs are the result of interest rate concessions for a limited period of time. Following is a summary of loans, by class, that have been restructured:

	Three Months Ended March 31, 2015						Three Months Ended March 31, 2014
	Number of Contracts		Pre-Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment		Number of Contracts		Pre-Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment
Commercial real estate		2	$	312	$	196		1	$	188	$	188
Commercial and industrial		—		—		—		1		52		50
Total commercial loans		2		312		196		2		240		238
Direct installment		131		1,526		1,484		126		1,678		1,647
Residential mortgages		14		581		631		9		281		280
Indirect installment		5		16		16		7		17		16
Consumer lines of credit		16		270		270		7		255		255
Other		—		—		—		—		—		—
		168	$	2,705	$	2,597		151	$	2,471	$	2,436

Following is a summary of TDRs, by class of loans and leases, for which there was a payment default, excluding loans that were either charged-off or cured by period end. Default occurs when a loan is 90 days or more past due and is within 12 months of restructuring.

	Three Months Ended March 31, 2015 (1)				Three Months Ended March 31, 2014 (1)
	Number of Contracts		Recorded Investment		Number of Contracts		Recorded Investment
Direct installment		37	$	105		18	$	171
Residential mortgages		2		102		—		—
Indirect installment		3		4		1		—
Consumer lines of credit		1		92		—		—
Other		—		—		—		—
		43	$	303		19	$	171

(1) The recorded investment is as of period end.

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Loans and Leases - Summary of Impaired Loans, by Class (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	$ 79,186	$ 81,765
Recorded Investment With No Specific Reserve	64,979	66,619
Recorded Investment With Specific Reserve	2,940	2,831
Total Recorded Investment	67,919	69,450
Specific Reserve	2,181	1,179
Average Recorded Investment	69,663	75,367
Commercial Real Estate [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	34,483	34,583
Recorded Investment With No Specific Reserve	25,015	25,443
Recorded Investment With Specific Reserve	1,012	883
Total Recorded Investment	26,027	26,326
Specific Reserve	735	399
Average Recorded Investment	26,176	30,807
Commercial and Industrial [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	11,251	11,412
Recorded Investment With No Specific Reserve	8,138	7,609
Recorded Investment With Specific Reserve	1,928	1,948
Total Recorded Investment	10,066	9,557
Specific Reserve	1,446	780
Average Recorded Investment	9,811	9,510
Commercial Leases [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	732	722
Recorded Investment With No Specific Reserve	732	722
Total Recorded Investment	732	722
Average Recorded Investment	727	686
Total Commercial Loans and Leases [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	46,466	46,717
Recorded Investment With No Specific Reserve	33,885	33,774
Recorded Investment With Specific Reserve	2,940	2,831
Total Recorded Investment	36,825	36,605
Specific Reserve	2,181	1,179
Average Recorded Investment	36,714	41,003
Direct Installment [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	13,977	14,987
Recorded Investment With No Specific Reserve	13,768	14,680
Total Recorded Investment	13,768	14,680
Average Recorded Investment	14,343	14,248
Residential Mortgages [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	15,718	16,791
Recorded Investment With No Specific Reserve	14,472	15,064
Total Recorded Investment	14,472	15,064
Average Recorded Investment	15,547	16,924
Indirect Installment [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	1,425	1,467
Recorded Investment With No Specific Reserve	1,265	1,305
Total Recorded Investment	1,265	1,305
Average Recorded Investment	1,363	1,399
Consumer Lines of Credit [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	1,600	1,803
Recorded Investment With No Specific Reserve	1,589	1,796
Total Recorded Investment	1,589	1,796
Average Recorded Investment	$ 1,696	$ 1,793

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Securities

3 Months Ended

Mar. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Securities

SECURITIES

The amortized cost and fair value of securities are as follows:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Securities Available for Sale
March 31, 2015
U.S. Treasury	$	29,637	$	300	$	—		$	29,937
U.S. government-sponsored entities		388,363		2,818		(521	)		390,660
Residential mortgage-backed securities:
Agency mortgage-backed securities		494,497		11,064		—			505,561
Agency collateralized mortgage obligations		573,738		3,646		(5,367	)		572,017
Non-agency collateralized mortgage obligations		1,359		5		—			1,364
Commercial mortgage-backed securities		6,844		—		(1	)		6,843
States of the U.S. and political subdivisions		12,713		476		(14	)		13,175
Other debt securities		16,643		373		(785	)		16,231
Total debt securities		1,523,794		18,682		(6,688	)		1,535,788
Equity securities		1,031		261		—			1,292
	$	1,524,825	$	18,943	$	(6,688	)	$	1,537,080
December 31, 2014
U.S. Treasury	$	29,604	$	78	$	—		$	29,682
U.S. government-sponsored entities		338,330		742		(1,939	)		337,133
Residential mortgage-backed securities:
Agency mortgage-backed securities		546,572		7,548		(35	)		554,085
Agency collateralized mortgage obligations		580,601		1,617		(9,047	)		573,171
Non-agency collateralized mortgage obligations		1,414		17		—			1,431
Commercial mortgage-backed securities		7,891		—		(11	)		7,880
States of the U.S. and political subdivisions		12,713		477		(32	)		13,158
Other debt securities		16,615		420		(857	)		16,178
Total debt securities		1,533,740		10,899		(11,921	)		1,532,718
Equity securities		1,031		316		—			1,347
	$	1,534,771	$	11,215	$	(11,921	)	$	1,534,065
Securities Held to Maturity
March 31, 2015
U.S. Treasury	$	500	$	182	$	—		$	682
U.S. government-sponsored entities		146,578		1,731		(149	)		148,160
Residential mortgage-backed securities:
Agency mortgage-backed securities		674,101		19,130		(20	)		693,211
Agency collateralized mortgage obligations		505,859		3,633		(4,884	)		504,608
Non-agency collateralized mortgage obligations		3,840		21		—			3,861
Commercial mortgage-backed securities		17,484		385		—			17,869
States of the U.S. and political subdivisions		164,842		3,372		(156	)		168,058
	$	1,513,204	$	28,454	$	(5,209	)	$	1,536,449
December 31, 2014
U.S. Treasury	$	502	$	168	$	—		$	670
U.S. government-sponsored entities		101,602		885		(524	)		101,963
Residential mortgage-backed securities:
Agency mortgage-backed securities		677,169		16,712		(346	)		693,535
Agency collateralized mortgage obligations		501,965		1,858		(7,329	)		496,494
Non-agency collateralized mortgage obligations		4,285		28		—			4,313
Commercial mortgage-backed securities		17,560		179		—			17,739
States of the U.S. and political subdivisions		150,272		3,315		(43	)		153,544
	$	1,453,355	$	23,145	$	(8,242	)	$	1,468,258

The Corporation classifies securities as trading securities when management intends to sell such securities in the near term. Such securities are carried at fair value, with unrealized gains (losses) reflected through the consolidated statements of comprehensive income. The Corporation classified certain securities acquired in conjunction with its acquisitions as trading securities. The Corporation both acquired and sold these trading securities during the quarterly periods in which each of the acquisitions occurred. As of March 31, 2015 and December 31, 2014, the Corporation did not hold any trading securities.

Gross gains and gross losses were realized on securities as follows:

	Three Months Ended
	March 31,
	2015			2014
Gross gains	$	—		$	18,009
Gross losses		(9	)		(8,548	)
	$	(9	)	$	9,461

During the first quarter of 2014, the Corporation strategically sold its entire portfolio of pooled trust preferred securities (TPS) with net proceeds of $51,540 and a gain of $13,766. These were previously classified as collateralized debt obligations (CDOs) available for sale. Of the 23 pooled securities sold, one was determined to be a disallowed investment under the Volcker Rule (Section 619) of the Dodd-Frank Wall Street Reform and Consumer Protection Act (Dodd-Frank Act), and as such, was required to be disposed of by July 2015. Partially offsetting this gain was a net loss of $4,305 relating to the sale of other securities. By selling these securities, the Corporation strengthened the risk profile of its investment portfolio, improved its capital levels due to lowered risk-weighted assets and generated capital to support future growth.

As of March 31, 2015, the amortized cost and fair value of securities, by contractual maturities, were as follows:

	Available for Sale				Held to Maturity
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due in one year or less	$	4,985	$	5,069	$	1,282	$	1,285
Due from one to five years		423,890		426,811		138,269		139,139
Due from five to ten years		11,591		12,018		72,457		74,672
Due after ten years		6,890		6,105		99,912		101,804
		447,356		450,003		311,920		316,900
Residential mortgage-backed securities:
Agency mortgage-backed securities		494,497		505,561		674,101		693,211
Agency collateralized mortgage obligations		573,738		572,017		505,859		504,608
Non-agency collateralized mortgage obligations		1,359		1,364		3,840		3,861
Commercial mortgage-backed securities		6,844		6,843		17,484		17,869
Equity securities		1,031		1,292		—		—
	$	1,524,825	$	1,537,080	$	1,513,204	$	1,536,449

Maturities may differ from contractual terms because borrowers may have the right to call or prepay obligations with or without penalties. Periodic payments are received on mortgage-backed securities based on the payment patterns of the underlying collateral.

At March 31, 2015 and December 31, 2014, securities with a carrying value of $1,315,565 and $1,036,380, respectively, were pledged to secure public deposits, trust deposits and for other purposes as required by law. Securities with a carrying value of $807,261 and $892,647 at March 31, 2015 and December 31, 2014, respectively, were pledged as collateral for short-term borrowings.

Following are summaries of the fair values and unrealized losses of securities, segregated by length of impairment:

	Less than 12 Months							12 Months or More							Total
	#		Fair Value		Unrealized Losses			#		Fair Value		Unrealized Losses			#		Fair Value		Unrealized Losses
Securities Available for Sale
March 31, 2015
U.S. government-sponsored entities		3	$	59,857	$	(142	)		5	$	55,612	$	(379	)		8	$	115,469	$	(521	)
Residential mortgage-backed securities:
Agency collateralized mortgage obligations		4		61,998		(199	)		17		242,124		(5,168	)		21		304,122		(5,367	)
Commercial mortgage-backed securities		1		6,843		(1	)		—		—		—			1		6,843		(1	)
States of the U.S. and political subdivisions		—		—		—			1		1,177		(14	)		1		1,177		(14	)
Other debt securities		—		—		—			4		6,105		(785	)		4		6,105		(785	)
		8	$	128,698	$	(342	)		27	$	305,018	$	(6,346	)		35	$	433,716	$	(6,688	)
December 31, 2014
U.S. government-sponsored entities		7	$	89,986	$	(275	)		7	$	99,326	$	(1,664	)		14	$	189,312	$	(1,939	)
Residential mortgage-backed securities:
Agency mortgage-backed securities		2		45,145		(35	)		—		—		—			2		45,145		(35	)
Agency collateralized mortgage obligations		9		166,908		(1,238	)		16		225,700		(7,809	)		25		392,608		(9,047	)
Commercial mortgage-backed securities		1		7,880		(11	)		—		—		—			1		7,880		(11	)
States of the U.S. and political subdivisions		—		—		—			1		1,159		(32	)		1		1,159		(32	)
Other debt securities		—		—		—			4		6,030		(857	)		4		6,030		(857	)
		19	$	309,919	$	(1,559	)		28	$	332,215	$	(10,362	)		47	$	642,134	$	(11,921	)
Securities Held to Maturity
March 31, 2015
U.S. government-sponsored entities		1	$	14,970	$	(30	)		1	$	14,881	$	(119	)		2	$	29,851	$	(149	)
Residential mortgage-backed securities:
Agency mortgage-backed securities		—		—		—			1		1,234		(20	)		1		1,234		(20	)
Agency collateralized mortgage obligations		4		69,926		(402	)		14		185,466		(4,482	)		18		255,392		(4,884	)
States of the U.S. and political subdivisions		8		13,418		(156	)		—		—		—			8		13,418		(156	)
		13	$	98,314	$	(588	)		16	$	201,581	$	(4,621	)		29	$	299,895	$	(5,209	)
December 31, 2014
U.S. government-sponsored entities		2	$	24,989	$	(40	)		2	$	29,516	$	(484	)		4	$	54,505	$	(524	)
Residential mortgage-backed securities:
Agency mortgage-backed securities		1		1,099		(1	)		4		45,042		(345	)		5		46,141		(346	)
Agency collateralized mortgage obligations		8		104,071		(630	)		14		189,642		(6,699	)		22		293,713		(7,329	)
States of the U.S. and political subdivisions		1		1,427		(4	)		4		5,453		(39	)		5		6,880		(43	)
		12	$	131,586	$	(675	)		24	$	269,653	$	(7,567	)		36	$	401,239	$	(8,242	)

The Corporation does not intend to sell the debt securities and it is not more likely than not the Corporation will be required to sell the securities before recovery of their amortized cost basis.

The Corporation’s remaining portfolio of TPS consists of four single-issuer securities, which are primarily from money-center and large regional banks and are included in other debt securities. These TPS had an amortized cost and estimated fair value of $6,890 and $6,105 at March 31, 2015, respectively. The Corporation has concluded from its analysis performed at March 31, 2015 that it is probable that the Corporation will collect all contractual principal and interest payments related to these securities.

Other-Than-Temporary Impairment

The Corporation evaluates its investment securities portfolio for other-than-temporary impairment (OTTI) on a quarterly basis. Impairment is assessed at the individual security level. The Corporation considers an investment security impaired if the fair value of the security is less than its cost or amortized cost basis. The following table presents a summary of the cumulative credit-related OTTI charges recognized as components of earnings for securities for which a portion of an OTTI is recognized in other comprehensive income:

	Collateralized Debt Obligations			Equities		Total
For the Three Months Ended March 31, 2015
Beginning balance		—		$	27	$	27
Loss where impairment was not previously recognized		—			—		—
Additional loss where impairment was previously recognized		—			—		—
Reduction due to credit impaired securities sold		—			—		—
Ending balance		—		$	27	$	27
For the Three Months Ended March 31, 2014
Beginning balance	$	17,155		$	27	$	17,182
Loss where impairment was not previously recognized		—			—		—
Additional loss where impairment was previously recognized		—			—		—
Reduction due to credit impaired securities sold		(17,155	)		—		(17,155	)
Ending balance	$	—		$	27	$	27

The Corporation did not recognize any impairment losses on securities for the three months ended March 31, 2015 or 2014.

States of the U.S. and Political Subdivisions

The Corporation’s municipal bond portfolio of $178,017 as of March 31, 2015 is highly rated with an average entity-specific rating of AA and 99.0% of the portfolio rated A or better. General obligation bonds comprise 99.5% of the portfolio. Geographically, municipal bonds support the Corporation’s primary footprint as 89.9% of the securities are from municipalities located throughout Pennsylvania, Ohio and Maryland. The average holding size of the securities in the municipal bond portfolio is $1,203. In addition to the strong stand-alone ratings, 88.0% of the municipalities have some formal credit enhancement insurance that strengthens the creditworthiness of their issue. Management also reviews the credit profile of each issuer on a quarterly basis.

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Federal Home Loan Bank Stock

3 Months Ended

Mar. 31, 2015

Banking and Thrift [Abstract]

Federal Home Loan Bank Stock

FEDERAL HOME LOAN BANK STOCK

The Corporation is a member of the Federal Home Loan Bank (FHLB) of Pittsburgh. The FHLB requires members to purchase and hold a specified minimum level of FHLB stock based upon their level of borrowings, collateral balances and participation in other programs offered by the FHLB. Stock in the FHLB is non-marketable and is redeemable at the discretion of the FHLB. Both cash and stock dividends on FHLB stock are reported as income.

Members do not purchase stock in the FHLB for the same reasons that traditional equity investors acquire stock in an investor-owned enterprise. Rather, members purchase stock to obtain access to the low-cost products and services offered by the FHLB. Unlike equity securities of traditional for-profit enterprises, the stock of FHLB does not provide its holders with an opportunity for capital appreciation because, by regulation, FHLB stock can only be purchased, redeemed and transferred at par value.

At March 31, 2015 and December 31, 2014, the Corporation’s FHLB stock totaled $42,000 and $54,751, respectively, and is included in other assets on the balance sheet. The Corporation accounts for the stock in accordance with ASC 325, which requires the investment to be carried at cost and evaluated for impairment based on the ultimate recoverability of the par value. Due to the continued improvement of the FHLB’s financial performance and stability over the past several years, along with a special dividend during the first quarter of 2015 and quarterly cash dividends in 2014 and the first quarter of 2015, the Corporation believes its holdings in the stock are ultimately recoverable at par value and, therefore, determined that FHLB stock was not other-than-temporarily impaired. In addition, the Corporation has ample liquidity and does not require redemption of its FHLB stock in the foreseeable future.

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Allowance for Credit Losses

3 Months Ended

Mar. 31, 2015

Receivables [Abstract]

Allowance for Credit Losses

ALLOWANCE FOR CREDIT LOSSES

The allowance for credit losses is established as losses are estimated to have occurred through a provision charged to earnings. Losses are charged against the allowance for credit losses when management believes the uncollectability of a loan balance is confirmed. Subsequent recoveries, if any, are credited to the allowance for credit losses. Allowances for impaired commercial loans over $500 are generally determined based on collateral values or the present value of estimated cash flows. All other impaired loans and leases are evaluated in the aggregate based on loan segment loss given default. Changes in the allowance for credit losses related to impaired loans and leases are charged or credited to the provision for credit losses.

The allowance for credit losses is maintained at a level that, in management’s judgment, is believed adequate to absorb probable losses associated with specifically identified loans and leases, as well as estimated probable credit losses inherent in the remainder of the portfolio. Adequacy of the allowance for credit losses is based on management’s evaluation of potential losses in the portfolio, which includes an assessment of past experience, current economic conditions in specific industries and geographic areas, general economic conditions, known and inherent risks in the portfolio, the estimated value of underlying collateral and residuals and changes in the composition of the portfolio. Determination of the allowance for credit losses is inherently subjective as it requires significant estimates, including the amounts and timing of expected future cash flows on impaired loans and leases, estimated losses on pools of homogeneous loans and leases based on transition matrices with predefined loss emergence periods and consideration of qualitative factors, all of which are susceptible to significant change.

Credit impaired loans obtained through acquisitions are accounted for under the provisions of ASC 310-30. The Corporation also accounts for certain acquired loans considered performing at the time of acquisition by analogy to ASC 310-30. ASC 310-30 requires the initial recognition of acquired loans at the present value of amounts expected to be received. Any deterioration in the credit quality of acquired loans subsequent to acquisition would be considered in the allowance for credit losses.

Following is a summary of changes in the allowance for credit losses, by loan and lease class:

	Balance at Beginning of Period		Charge- Offs			Recoveries		Net Charge- Offs			Provision for credit losses			Balance at End of Period
Three Months Ended March 31, 2015
Commercial real estate	$	37,588	$	(1,001	)	$	209	$	(792	)	$	1,996		$	38,792
Commercial and industrial		32,645		(684	)		120		(564	)		722			32,803
Commercial leases		2,398		(93	)		10		(83	)		261			2,576
Total commercial loans and leases		72,631		(1,778	)		339		(1,439	)		2,979			74,171
Direct installment		20,538		(2,433	)		269		(2,164	)		2,830			21,204
Residential mortgages		8,024		(511	)		15		(496	)		943			8,471
Indirect installment		7,504		(1,280	)		302		(978	)		1,131			7,657
Consumer lines of credit		8,496		(410	)		40		(370	)		764			8,890
Other		759		(335	)		11		(324	)		419			854
Total allowance on originated loans and leases		117,952		(6,747	)		976		(5,771	)		9,066			121,247
Purchased credit-impaired loans		660		(64	)		19		(45	)		6			621
Other acquired loans		7,314		(77	)		330		253			(936	)		6,631
Total allowance on acquired loans		7,974		(141	)		349		208			(930	)		7,252
Total allowance	$	125,926	$	(6,888	)	$	1,325	$	(5,563	)	$	8,136		$	128,499
Three Months Ended March 31, 2014
Commercial real estate	$	32,548	$	(2,223	)	$	299	$	(1,924	)	$	7,910		$	38,534
Commercial and industrial		32,603		(513	)		370		(143	)		(2,489	)		29,971
Commercial leases		1,903		(87	)		29		(58	)		99			1,944
Total commercial loans and leases		67,054		(2,823	)		698		(2,125	)		5,520			70,449
Direct installment		17,824		(2,521	)		267		(2,254	)		1,060			16,630
Residential mortgages		5,836		(132	)		4		(128	)		(401	)		5,307
Indirect installment		6,409		(802	)		217		(585	)		676			6,500
Consumer lines of credit		7,231		(323	)		55		(268	)		695			7,658
Other		530		(262	)		5		(257	)		306			579
Total allowance on originated loans and leases		104,884		(6,863	)		1,246		(5,617	)		7,856			107,123
Purchased credit-impaired loans		1,000		(249	)		—		(249	)		(43	)		708
Other acquired loans		4,900		9			286		295			(807	)		4,388
Total allowance on acquired loans		5,900		(240	)		286		46			(850	)		5,096
Total allowance	$	110,784	$	(7,103	)	$	1,532	$	(5,571	)	$	7,006		$	112,219

Following is a summary of the individual and collective originated allowance for credit losses and corresponding loan and lease balances by class:

	Allowance				Loans and Leases Outstanding
	Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Loans and Leases		Individually Evaluated for Impairment		Collectively Evaluated for Impairment
March 31, 2015
Commercial real estate	$	735	$	38,057	$	3,082,385	$	12,865	$	3,069,520
Commercial and industrial		1,446		31,357		2,281,075		5,711		2,275,364
Commercial leases		—		2,576		180,207		—		180,207
Total commercial loans and leases		2,181		71,990		5,543,667		18,576		5,525,091
Direct installment		—		21,204		1,594,846		—		1,594,846
Residential mortgages		—		8,471		877,437		—		877,437
Indirect installment		—		7,657		903,780		—		903,780
Consumer lines of credit		—		8,890		953,569		—		953,569
Other		—		854		42,632		—		42,632
	$	2,181	$	119,066	$	9,915,931	$	18,576	$	9,897,355
December 31, 2014
Commercial real estate	$	399	$	37,189	$	3,031,810	$	13,952	$	3,017,858
Commercial and industrial		780		31,865		2,197,793		5,837		2,191,956
Commercial leases		—		2,398		177,824		—		177,824
Total commercial loans and leases		1,179		71,452		5,407,427		19,789		5,387,638
Direct installment		—		20,538		1,579,770		—		1,579,770
Residential mortgages		—		8,024		817,586		—		817,586
Indirect installment		—		7,504		873,645		—		873,645
Consumer lines of credit		—		8,496		946,427		—		946,427
Other		—		759		41,290		—		41,290
	$	1,179	$	116,773	$	9,666,145	$	19,789	$	9,646,356

XML

Allowance for Credit Losses - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015
Receivables [Abstract]
Minimum corporation reserves for commercial loan	$ 500

XML

Retirement Plans - Net Periodic Benefit Credit for Defined Benefit Plans (Detail) (Defined Benefit Plans [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Defined Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 17	$ 16
Interest cost	1,477	1,596
Expected return on plan assets	(2,491)	(2,487)
Amortization:
Unrecognized net transition asset		(5)
Unrecognized prior service cost	2	2
Unrecognized loss	536	337
Net periodic pension credit	$ (459)	$ (541)

XML

Allowance for Credit Losses - Summary of Individual and Collective Allowance for Credit Losses and Loan and Lease Balances by Class (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Valuation Allowance [Line Items]
Allowance, Individually Evaluated for Impairment	$ 2,181	$ 1,179
Allowance, Collectively Evaluated for Impairment	119,066	116,773
Loans and Leases	11,404,099	11,247,038
Loans Outstanding, Individually Evaluated for Impairment	18,576	19,789
Loans Outstanding, Collectively Evaluated for Impairment	9,897,355	9,646,356
Commercial Real Estate [Member]
Valuation Allowance [Line Items]
Allowance, Individually Evaluated for Impairment	735	399
Allowance, Collectively Evaluated for Impairment	38,057	37,189
Loans and Leases	3,817,189	3,815,708
Loans Outstanding, Individually Evaluated for Impairment	12,865	13,952
Loans Outstanding, Collectively Evaluated for Impairment	3,069,520	3,017,858
Commercial and Industrial [Member]
Valuation Allowance [Line Items]
Allowance, Individually Evaluated for Impairment	1,446	780
Allowance, Collectively Evaluated for Impairment	31,357	31,865
Loans and Leases	2,397,731	2,318,015
Loans Outstanding, Individually Evaluated for Impairment	5,711	5,837
Loans Outstanding, Collectively Evaluated for Impairment	2,275,364	2,191,956
Commercial Leases [Member]
Valuation Allowance [Line Items]
Allowance, Collectively Evaluated for Impairment	2,576	2,398
Loans and Leases	180,207	177,824
Loans Outstanding, Collectively Evaluated for Impairment	180,207	177,824
Total Commercial Loans and Leases [Member]
Valuation Allowance [Line Items]
Allowance, Individually Evaluated for Impairment	2,181	1,179
Allowance, Collectively Evaluated for Impairment	71,990	71,452
Loans and Leases	6,395,127	6,311,547
Loans Outstanding, Individually Evaluated for Impairment	18,576	19,789
Loans Outstanding, Collectively Evaluated for Impairment	5,525,091	5,387,638
Direct Installment [Member]
Valuation Allowance [Line Items]
Allowance, Collectively Evaluated for Impairment	21,204	20,538
Loans and Leases	1,653,621	1,644,621
Loans Outstanding, Collectively Evaluated for Impairment	1,594,846	1,579,770
Residential Mortgages [Member]
Valuation Allowance [Line Items]
Allowance, Collectively Evaluated for Impairment	8,471	8,024
Loans and Leases	1,299,097	1,263,053
Loans Outstanding, Collectively Evaluated for Impairment	877,437	817,586
Indirect Installment [Member]
Valuation Allowance [Line Items]
Allowance, Collectively Evaluated for Impairment	7,657	7,504
Loans and Leases	905,204	875,551
Loans Outstanding, Collectively Evaluated for Impairment	903,780	873,645
Consumer Lines of Credit [Member]
Valuation Allowance [Line Items]
Allowance, Collectively Evaluated for Impairment	8,890	8,496
Loans and Leases	1,108,418	1,110,976
Loans Outstanding, Collectively Evaluated for Impairment	953,569	946,427
Other [Member]
Valuation Allowance [Line Items]
Allowance, Collectively Evaluated for Impairment	854	759
Loans and Leases	42,632	41,290
Loans Outstanding, Collectively Evaluated for Impairment	42,632	41,290
Originated Loans [Member]
Valuation Allowance [Line Items]
Loans and Leases	9,915,931	9,666,145
Originated Loans [Member] | Commercial Real Estate [Member]
Valuation Allowance [Line Items]
Loans and Leases	3,082,385	3,031,810
Originated Loans [Member] | Commercial and Industrial [Member]
Valuation Allowance [Line Items]
Loans and Leases	2,281,075	2,197,793
Originated Loans [Member] | Commercial Leases [Member]
Valuation Allowance [Line Items]
Loans and Leases	180,207	177,824
Originated Loans [Member] | Total Commercial Loans and Leases [Member]
Valuation Allowance [Line Items]
Loans and Leases	5,543,667	5,407,427
Originated Loans [Member] | Direct Installment [Member]
Valuation Allowance [Line Items]
Loans and Leases	1,594,846	1,579,770
Originated Loans [Member] | Residential Mortgages [Member]
Valuation Allowance [Line Items]
Loans and Leases	877,437	817,586
Originated Loans [Member] | Indirect Installment [Member]
Valuation Allowance [Line Items]
Loans and Leases	903,780	873,645
Originated Loans [Member] | Consumer Lines of Credit [Member]
Valuation Allowance [Line Items]
Loans and Leases	953,569	946,427
Originated Loans [Member] | Other [Member]
Valuation Allowance [Line Items]
Loans and Leases	$ 42,632	$ 41,290

XML

Loans and Leases - Summary of Troubled Debt Restructurings by Class of Loans and Leases, Payment Default (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015 Contract		Mar. 31, 2014 Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts	43		19
Recorded Investment	$ 303	[1]	$ 171	[1]
Direct Installment [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	37		18
Recorded Investment	105	[1]	171	[1]
Residential Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	2
Recorded Investment	102	[1]
Indirect Installment [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	3		1
Recorded Investment	4	[1]
Consumer Lines of Credit [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	1
Recorded Investment	$ 92	[1]

[1] The recorded investment is as of period end.

XML

Business Segments - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2015 Segment
Segment Reporting [Abstract]
Number of reportable segments	4

XML

Commitments, Credit Risk and Contingencies (Tables)

3 Months Ended

Mar. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Summary of Off-Balance Sheet Credit Risk Information

Following is a summary of off-balance sheet credit risk information:

	March 31, 2015		December 31, 2014
Commitments to extend credit	$	3,969,614	$	3,665,481
Standby letters of credit		109,355		121,186

XML

Federal Home Loan Bank Stock - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Federal Home Loan Bank stock	$ 42,000	$ 54,751

XML

Retirement Plans

3 Months Ended

Mar. 31, 2015

Compensation and Retirement Disclosure [Abstract]

Retirement Plans

RETIREMENT PLANS

The Corporation sponsors the Retirement Income Plan (RIP), a qualified noncontributory defined benefit pension plan that covered substantially all salaried employees hired prior to January 1, 2008. The RIP covers employees who satisfied minimum age and length of service requirements. The Corporation’s funding guideline has been to make annual contributions to the RIP each year, if necessary, such that minimum funding requirements have been met. The RIP was frozen as of December 31, 2010.

The Corporation also sponsors two supplemental non-qualified retirement plans. The ERISA Excess Retirement Plan provides retirement benefits equal to the difference, if any, between the maximum benefit allowable under the Internal Revenue Code and the amount that would be provided under the RIP, if no limits were applied. The Basic Retirement Plan (BRP) is applicable to certain officers whom the Board of Directors designates. Officers participating in the BRP receive a benefit based on a target benefit percentage based on years of service at retirement and a designated tier as determined by the Board of Directors. When a participant retires, the basic benefit under the BRP is a monthly benefit equal to the target benefit percentage times the participant’s highest average monthly cash compensation during five consecutive calendar years within the last ten calendar years of employment. This monthly benefit is reduced by the monthly benefit the participant receives from Social Security, the RIP, the ERISA Excess Retirement Plan and the annuity equivalent of the three percent automatic contributions to the qualified 401(k) defined contribution plan and the ERISA Excess Lost Match Plan. The BRP was frozen as of December 31, 2008. The ERISA Excess Retirement Plan was frozen as of December 31, 2010.

The net periodic benefit credit for the defined benefit plans includes the following components:

	Three Months Ended
	March 31,
	2015			2014
Service cost	$	17		$	16
Interest cost		1,477			1,596
Expected return on plan assets		(2,491	)		(2,487	)
Amortization:
Unrecognized net transition asset		—			(5	)
Unrecognized prior service cost		2			2
Unrecognized loss		536			337
Net periodic pension credit	$	(459	)	$	(541	)

The Corporation’s subsidiaries participate in a qualified 401(k) defined contribution plan under which employees may contribute a percentage of their salary. Employees are eligible to participate upon their first day of employment. Under this plan, the Corporation matches 100% of the first six percent that the employee defers. Additionally, the Corporation may provide a performance-based company contribution of up to three percent if the Corporation exceeds annual financial goals. Prior to January 1, 2015, the Corporation matched 100% of the first four percent that the employee deferred, provided an automatic contribution of three percent of compensation at the end of the year and could make an additional performance-based company contribution of up to two percent if the Corporation achieved its performance goals for the plan year. The Corporation’s contribution expense was $2,167 and $2,570 for the three months ended March 31, 2015 and 2014, respectively.

The Corporation also sponsors an ERISA Excess Lost Match Plan for certain officers. This plan provides retirement benefits equal to the difference, if any, between the maximum benefit allowable under the Internal Revenue Code and the amount that would have been provided under the qualified 401(k) defined contribution plan, if no limits were applied.

XML

Business Segments

3 Months Ended

Mar. 31, 2015

Segment Reporting [Abstract]

Business Segments

BUSINESS SEGMENTS

The Corporation operates in four reportable segments: Community Banking, Wealth Management, Insurance and Consumer Finance.

• The Community Banking segment provides commercial and consumer banking services. Commercial banking solutions include corporate banking, small business banking, investment real estate financing, asset based lending, capital markets and lease financing. Consumer banking products and services include deposit products, mortgage lending, consumer lending and a complete suite of mobile and online banking services.

• The Wealth Management segment provides a broad range of personal and corporate fiduciary services including the administration of decedent and trust estates. In addition, it offers various alternative products, including securities brokerage and investment advisory services, mutual funds and annuities.

• The Insurance segment includes a full-service insurance agency offering all lines of commercial and personal insurance through major carriers. The Insurance segment also includes a reinsurer.

• The Consumer Finance segment primarily makes installment loans to individuals and purchases installment sales finance contracts from retail merchants. The Consumer Finance segment activity is funded through the sale of the Corporation’s subordinated notes at the finance company’s branch offices.

The following tables provide financial information for these segments of the Corporation. The information provided under the caption “Parent and Other” represents operations not considered to be reportable segments and/or general operating expenses of the Corporation, and includes the parent company, other non-bank subsidiaries and eliminations and adjustments which are necessary for purposes of reconciliation to the consolidated amounts.

	Community Banking		Wealth Management		Insurance			Consumer Finance		Parent and Other			Consolidated
At or for the Three Months Ended March 31, 2015
Interest income	$	122,118	$	—	$	23		$	9,593	$	1,635		$	133,369
Interest expense		9,941		—		—			860		647			11,448
Net interest income		112,177		—		23			8,733		988			121,921
Provision for credit losses		6,327		—		—			1,574		235			8,136
Non-interest income		27,301		8,387		3,593			676		(1,775	)		38,182
Non-interest expense		77,079		6,493		4,170			4,808		(10	)		92,540
Intangible amortization		1,947		68		100			—		—			2,115
Income tax expense (benefit)		15,931		658		(226	)		1,149		(543	)		16,969
Net income (loss)		38,194		1,168		(428	)		1,878		(469	)		40,343
Total assets		16,100,851		21,125		18,464			182,662		(44,254	)		16,278,848
Total intangibles		852,764		10,652		10,021			1,809		—			875,246
At or for the Three Months Ended March 31, 2014
Interest income	$	106,691	$	—	$	25		$	9,365	$	1,799		$	117,880
Interest expense		8,248		—		—			846		961			10,055
Net interest income		98,443		—		25			8,519		838			107,825
Provision for credit losses		5,296		—		—			1,457		253			7,006
Non-interest income		31,913		7,323		4,210			660		(2,036	)		42,070
Non-interest expense		76,866		6,292		3,046			4,937		742			91,883
Intangible amortization		2,110		72		101			—		—			2,283
Income tax expense (benefit)		13,343		351		385			1,073		(953	)		14,199
Net income (loss)		32,741		608		703			1,712		(1,240	)		34,524
Total assets		14,299,543		19,542		19,954			182,018		(44,547	)		14,476,510
Total intangibles		833,642		10,936		10,425			1,809		—			856,812

XML

Fair Value Measurements - Balances of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale securities	$ 1,537,080	$ 1,534,065
Derivative financial instruments	57,551	45,898
Derivative financial instruments	54,431	46,160
U.S. Treasury [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale debt securities	29,937	29,682
U.S. Government-Sponsored Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale debt securities	390,660	337,133
Agency Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale debt securities	572,017	573,171
Assets measured at fair value, Available for sale securities	572,017
Non-Agency Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale debt securities	1,364	1,431
Assets measured at fair value, Available for sale securities	1,364
Commercial Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale debt securities	6,843	7,880
Assets measured at fair value, Available for sale securities	6,843
States of the U.S. and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale debt securities	13,175	13,158
Other Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale debt securities	16,231	16,178
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale securities	212	218
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale securities	1,535,079	1,531,952
Derivative financial instruments	57,551	45,898
Derivative financial instruments	54,431	46,160
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale securities	1,789	1,895
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale debt securities	1,535,788	1,532,718
Assets measured at fair value, Available for sale equity securities	1,292	1,347
Assets measured at fair value, Available for sale securities	1,537,080	1,534,065
Derivative financial instruments	57,551	45,898
Assets measured at fair value, Total	1,594,631	1,579,963
Liabilities measured at fair value, Total	54,431	46,160
Fair Value, Measurements, Recurring [Member] | U.S. Treasury [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale debt securities	29,937	29,682
Fair Value, Measurements, Recurring [Member] | U.S. Government-Sponsored Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale debt securities	390,660	337,133
Fair Value, Measurements, Recurring [Member] | Agency Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale debt securities	572,017	573,171
Fair Value, Measurements, Recurring [Member] | Non-Agency Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale debt securities	1,364	1,431
Fair Value, Measurements, Recurring [Member] | Commercial Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale debt securities	6,843	7,880
Fair Value, Measurements, Recurring [Member] | States of the U.S. and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale debt securities	13,175	13,158
Fair Value, Measurements, Recurring [Member] | Other Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale debt securities	16,231	16,178
Fair Value, Measurements, Recurring [Member] | Agency Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale debt securities	505,561	554,085
Fair Value, Measurements, Recurring [Member] | Financial Services Industry [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale equity securities	1,171	1,228
Fair Value, Measurements, Recurring [Member] | Insurance Services Industry [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale equity securities	121	119
Fair Value, Measurements, Recurring [Member] | Trading Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments	53,614	43,789
Fair Value, Measurements, Recurring [Member] | Not for Trading Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments	3,937	2,109
Fair Value, Measurements, Recurring [Member] | Trading Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments	53,762	43,830
Fair Value, Measurements, Recurring [Member] | Not for Trading Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments	669	2,330
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale equity securities	212	218
Assets measured at fair value, Available for sale securities	212	218
Assets measured at fair value, Total	212	218
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Financial Services Industry [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale equity securities	91	99
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Insurance Services Industry [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale equity securities	121	119
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale debt securities	1,534,434	1,531,298
Assets measured at fair value, Available for sale equity securities	645	654
Assets measured at fair value, Available for sale securities	1,535,079	1,531,952
Derivative financial instruments	57,551	45,898
Assets measured at fair value, Total	1,592,630	1,577,850
Liabilities measured at fair value, Total	54,431	46,160
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | U.S. Treasury [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale debt securities	29,937	29,682
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | U.S. Government-Sponsored Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale debt securities	390,660	337,133
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Agency Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale debt securities	572,017	573,171
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Non-Agency Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale debt securities	10	11
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Commercial Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale debt securities	6,843	7,880
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | States of the U.S. and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale debt securities	13,175	13,158
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Other Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale debt securities	16,231	16,178
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Agency Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale debt securities	505,561	554,085
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Financial Services Industry [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale equity securities	645	654
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Trading Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments	53,614	43,789
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Not for Trading Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments	3,937	2,109
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Trading Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments	53,762	43,830
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Not for Trading Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments	669	2,330
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale debt securities	1,354	1,420
Assets measured at fair value, Available for sale equity securities	435	475
Assets measured at fair value, Available for sale securities	1,789	1,895
Assets measured at fair value, Total	1,789	1,895
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Non-Agency Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale debt securities	1,354	1,420
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Financial Services Industry [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, Available for sale equity securities	$ 435	$ 475

XML

Securities - Summaries of Fair Values and Unrealized Losses of Securities, Segregated by Length of Impairment (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015 Security	Dec. 31, 2014 Security
Schedule Of Securities [Line Items]
Number of available for sale securities, Less than 1 year	8	19
Number of available for sale securities, Greater than 1 year	27	28
Number of available for sale securities	35	47
Securities Available For Sale, Less than 12 Months, Fair Value	$ 128,698	$ 309,919
Securities Available For Sale, Less than 12 Months, Unrealized Losses	(342)	(1,559)
Securities Available For Sale, 12 Months or More, Fair Value	305,018	332,215
Securities Available For Sale, 12 Months or More, Unrealized Losses	(6,346)	(10,362)
Securities Available For Sale, Fair Value, Total	433,716	642,134
Securities Available For Sale, Unrealized Losses, Total	(6,688)	(11,921)
Number of held to maturity securities	29	36
Securities Held To Maturity, Less than 12 Months, Fair Value	98,314	131,586
Securities Held To Maturity, Less than 12 Months, Unrealized Losses	(588)	(675)
Securities Held To Maturity, Greater than 12 Months, Fair Value	201,581	269,653
Securities Held To Maturity, Greater than 12 Months, Unrealized Losses	(4,621)	(7,567)
Securities Held To Maturity, Fair Value, Total	299,895	401,239
Securities Held To Maturity, Unrealized Losses, Total	(5,209)	(8,242)
Less than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities	13	12
Greater than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities	16	24
U.S. Government-Sponsored Entities [Member]
Schedule Of Securities [Line Items]
Number of available for sale securities, Less than 1 year	3	7
Number of available for sale securities, Greater than 1 year	5	7
Number of available for sale securities	8	14
Securities Available For Sale, Less than 12 Months, Fair Value	59,857	89,986
Securities Available For Sale, Less than 12 Months, Unrealized Losses	(142)	(275)
Securities Available For Sale, 12 Months or More, Fair Value	55,612	99,326
Securities Available For Sale, 12 Months or More, Unrealized Losses	(379)	(1,664)
Securities Available For Sale, Fair Value, Total	115,469	189,312
Securities Available For Sale, Unrealized Losses, Total	(521)	(1,939)
Number of held to maturity securities	2	4
Securities Held To Maturity, Less than 12 Months, Fair Value	14,970	24,989
Securities Held To Maturity, Less than 12 Months, Unrealized Losses	(30)	(40)
Securities Held To Maturity, Greater than 12 Months, Fair Value	14,881	29,516
Securities Held To Maturity, Greater than 12 Months, Unrealized Losses	(119)	(484)
Securities Held To Maturity, Fair Value, Total	29,851	54,505
Securities Held To Maturity, Unrealized Losses, Total	(149)	(524)
U.S. Government-Sponsored Entities [Member] | Less than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities	1	2
U.S. Government-Sponsored Entities [Member] | Greater than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities	1	2
Agency Mortgage-Backed Securities [Member]
Schedule Of Securities [Line Items]
Number of available for sale securities, Less than 1 year		2
Number of available for sale securities		2
Securities Available For Sale, Less than 12 Months, Fair Value		45,145
Securities Available For Sale, Less than 12 Months, Unrealized Losses		(35)
Securities Available For Sale, Fair Value, Total		45,145
Securities Available For Sale, Unrealized Losses, Total		(35)
Number of held to maturity securities	1	5
Securities Held To Maturity, Less than 12 Months, Fair Value		1,099
Securities Held To Maturity, Less than 12 Months, Unrealized Losses		(1)
Securities Held To Maturity, Greater than 12 Months, Fair Value	1,234	45,042
Securities Held To Maturity, Greater than 12 Months, Unrealized Losses	(20)	(345)
Securities Held To Maturity, Fair Value, Total	1,234	46,141
Securities Held To Maturity, Unrealized Losses, Total	(20)	(346)
Agency Mortgage-Backed Securities [Member] | Less than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities		1
Agency Mortgage-Backed Securities [Member] | Greater than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities	1	4
Agency Collateralized Mortgage Obligations [Member]
Schedule Of Securities [Line Items]
Number of available for sale securities, Less than 1 year	4	9
Number of available for sale securities, Greater than 1 year	17	16
Number of available for sale securities	21	25
Securities Available For Sale, Less than 12 Months, Fair Value	61,998	166,908
Securities Available For Sale, Less than 12 Months, Unrealized Losses	(199)	(1,238)
Securities Available For Sale, 12 Months or More, Fair Value	242,124	225,700
Securities Available For Sale, 12 Months or More, Unrealized Losses	(5,168)	(7,809)
Securities Available For Sale, Fair Value, Total	304,122	392,608
Securities Available For Sale, Unrealized Losses, Total	(5,367)	(9,047)
Number of held to maturity securities	18	22
Securities Held To Maturity, Less than 12 Months, Fair Value	69,926	104,071
Securities Held To Maturity, Less than 12 Months, Unrealized Losses	(402)	(630)
Securities Held To Maturity, Greater than 12 Months, Fair Value	185,466	189,642
Securities Held To Maturity, Greater than 12 Months, Unrealized Losses	(4,482)	(6,699)
Securities Held To Maturity, Fair Value, Total	255,392	293,713
Securities Held To Maturity, Unrealized Losses, Total	(4,884)	(7,329)
Agency Collateralized Mortgage Obligations [Member] | Less than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities	4	8
Agency Collateralized Mortgage Obligations [Member] | Greater than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities	14	14
Commercial Mortgage-Backed Securities [Member]
Schedule Of Securities [Line Items]
Number of available for sale securities, Less than 1 year	1	1
Number of available for sale securities	1	1
Securities Available For Sale, Less than 12 Months, Fair Value	6,843	7,880
Securities Available For Sale, Less than 12 Months, Unrealized Losses	(1)	(11)
Securities Available For Sale, Fair Value, Total	6,843	7,880
Securities Available For Sale, Unrealized Losses, Total	(1)	(11)
States of the U.S. and Political Subdivisions [Member]
Schedule Of Securities [Line Items]
Number of available for sale securities, Greater than 1 year	1	1
Number of available for sale securities	1	1
Securities Available For Sale, 12 Months or More, Fair Value	1,177	1,159
Securities Available For Sale, 12 Months or More, Unrealized Losses	(14)	(32)
Securities Available For Sale, Fair Value, Total	1,177	1,159
Securities Available For Sale, Unrealized Losses, Total	(14)	(32)
Number of held to maturity securities	8	5
Securities Held To Maturity, Less than 12 Months, Fair Value	13,418	1,427
Securities Held To Maturity, Less than 12 Months, Unrealized Losses	(156)	(4)
Securities Held To Maturity, Greater than 12 Months, Fair Value		5,453
Securities Held To Maturity, Greater than 12 Months, Unrealized Losses		(39)
Securities Held To Maturity, Fair Value, Total	13,418	6,880
Securities Held To Maturity, Unrealized Losses, Total	(156)	(43)
States of the U.S. and Political Subdivisions [Member] | Less than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities	8	1
States of the U.S. and Political Subdivisions [Member] | Greater than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities		4
Other Securities [Member]
Schedule Of Securities [Line Items]
Number of available for sale securities, Greater than 1 year	4	4
Number of available for sale securities	4	4
Securities Available For Sale, 12 Months or More, Fair Value	6,105	6,030
Securities Available For Sale, 12 Months or More, Unrealized Losses	(785)	(857)
Securities Available For Sale, Fair Value, Total	6,105	6,030
Securities Available For Sale, Unrealized Losses, Total	$ (785)	$ (857)

XML

Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2015

Fair Value Disclosures [Abstract]

Balances of Assets and Liabilities Measured at Fair Value on Recurring Basis

The following table presents the balances of assets and liabilities measured at fair value on a recurring basis:

	Level 1		Level 2		Level 3		Total
March 31, 2015
Assets Measured at Fair Value
Available for sale debt securities:
U.S. Treasury	$	—	$	29,937	$	—	$	29,937
U.S. government-sponsored entities		—		390,660		—		390,660
Residential mortgage-backed securities:
Agency mortgage-backed securities		—		505,561		—		505,561
Agency collateralized mortgage obligations		—		572,017		—		572,017
Non-agency collateralized mortgage obligations		—		10		1,354		1,364
Commercial mortgage-backed securities		—		6,843		—		6,843
States of the U.S. and political subdivisions		—		13,175		—		13,175
Other debt securities		—		16,231		—		16,231
		—		1,534,434		1,354		1,535,788
Available for sale equity securities:
Financial services industry		91		645		435		1,171
Insurance services industry		121		—		—		121
		212		645		435		1,292
		212		1,535,079		1,789		1,537,080
Derivative financial instruments:
Trading		—		53,614		—		53,614
Not for trading		—		3,937		—		3,937
		—		57,551		—		57,551
	$	212	$	1,592,630	$	1,789	$	1,594,631
Liabilities Measured at Fair Value
Derivative financial instruments:
Trading		—	$	53,762		—	$	53,762
Not for trading		—		669		—		669
		—	$	54,431		—	$	54,431

	Level 1		Level 2		Level 3		Total
December 31, 2014
Assets Measured at Fair Value
Available for sale debt securities:
U.S. Treasury	$	—	$	29,682	$	—	$	29,682
U.S. government-sponsored entities		—		337,133		—		337,133
Residential mortgage-backed securities:
Agency mortgage-backed securities		—		554,085		—		554,085
Agency collateralized mortgage obligations		—		573,171		—		573,171
Non-agency collateralized mortgage obligations		—		11		1,420		1,431
Commercial mortgage-backed securities		—		7,880		—		7,880
States of the U.S. and political subdivisions		—		13,158		—		13,158
Other debt securities		—		16,178		—		16,178
		—		1,531,298		1,420		1,532,718
Available for sale equity securities:
Financial services industry		99		654		475		1,228
Insurance services industry		119		—		—		119
		218		654		475		1,347
		218		1,531,952		1,895		1,534,065
Derivative financial instruments:
Trading		—		43,789		—		43,789
Not for trading		—		2,109		—		2,109
		—		45,898		—		45,898
	$	218	$	1,577,850	$	1,895	$	1,579,963
Liabilities Measured at Fair Value
Derivative financial instruments:
Trading		—	$	43,830		—	$	43,830
Not for trading		—		2,330		—		2,330
		—	$	46,160		—	$	46,160

Additional Information about Assets Measured at Fair Value on Recurring Basis

The following table presents additional information about assets measured at fair value on a recurring basis and for which the Corporation has utilized Level 3 inputs to determine fair value:

	Pooled Trust Preferred Collateralized Debt Obligations			Equity Securities			Residential Non-Agency Collateralized Mortgage Obligations			Total
Three Months Ended March 31, 2015
Balance at beginning of period		—		$	475		$	1,420		$	1,895
Total gains (losses) – realized/unrealized:
Included in earnings		—			—			—			—
Included in other comprehensive income		—			(40	)		(12	)		(52	)
Accretion included in earnings		—			—			1			1
Purchases, issuances, sales and settlements:
Purchases		—			—			—			—
Issuances		—			—			—			—
Sales/redemptions		—			—			—			—
Settlements		—			—			(55	)		(55	)
Transfers from Level 3		—			—			—			—
Transfers into Level 3		—			—			—			—
Balance at end of period		—		$	435		$	1,354		$	1,789
Year Ended December 31, 2014
Balance at beginning of period	$	31,595		$	410		$	1,744		$	33,749
Total gains (losses) – realized/unrealized:
Included in earnings		13,766			—			—			13,766
Included in other comprehensive income		5,608			65			3			5,676
Accretion included in earnings		657			—			5			662
Purchases, issuances, sales and settlements:
Purchases		—			—			—			—
Issuances		—			—			—			—
Sales/redemptions		(51,527	)		—			—			(51,527	)
Settlements		(99	)		—			(332	)		(431	)
Transfers from Level 3		—			—			—			—
Transfers into Level 3		—			—			—			—
Balance at end of period	$	—		$	475		$	1,420		$	1,895

Additional Information about Assets Measured at Fair Value on Non-Recurring Basis

measure these fair value adjustments were previously described. For assets measured at fair value on a non-recurring basis still held at the balance sheet date, the following table provides the hierarchy level and the fair value of the related assets or portfolios:

	Level 1		Level 2		Level 3		Total
March 31, 2015
Impaired loans		—	$	190	$	693	$	883
Other real estate owned		—		977		1,433		2,410
December 31, 2014
Impaired loans		—		177		1,528		1,705
Other real estate owned		—		5,695		2,365		8,060

Fair Values of Corporation's Financial Instruments

The fair values of the Corporation’s financial instruments are as follows:

					Fair Value Measurements
	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
March 31, 2015
Financial Assets
Cash and cash equivalents	$	234,246	$	234,246	$	234,246	$	—	$	—
Securities available for sale		1,537,080		1,537,080		212		1,535,079		1,789
Securities held to maturity		1,513,204		1,536,449		—		1,532,588		3,861
Net loans and leases, including loans held for sale		11,280,221		11,119,711		—		—		11,119,711
Derivative assets		57,551		57,551		—		57,551		—
Accrued interest receivable		41,935		41,935		41,935		—		—
Financial Liabilities
Deposits		11,806,043		11,812,401		9,217,159		2,595,242		—
Short-term borrowings		1,740,500		1,740,499		1,740,499		—		—
Long-term borrowings		541,474		541,955		—		—		541,955
Derivative liabilities		54,431		54,431		—		54,431		—
Accrued interest payable		6,511		6,511		6,511		—		—
December 31, 2014
Financial Assets
Cash and cash equivalents	$	287,393	$	287,393	$	287,393	$	—	$	—
Securities available for sale		1,534,065		1,534,065		218		1,531,952		1,895
Securities held to maturity		1,453,355		1,468,258		—		1,463,945		4,313
Net loans and leases, including loans held for sale		11,127,292		10,956,544		—		—		10,956,544
Derivative assets		45,898		45,898		—		45,898		—
Accrued interest receivable		40,231		40,231		40,231		—		—
Financial Liabilities
Deposits		11,382,208		11,382,402		8,771,173		2,611,229		—
Short-term borrowings		2,041,658		2,041,672		2,041,672		—		—
Long-term borrowings		541,443		539,007		—		—		539,007
Derivative liabilities		46,160		46,160		—		46,160		—
Accrued interest payable		6,689		6,689		6,689		—		—

XML

Consolidated Statements of Stockholders' Equity (Unaudited) (USD $) In Thousands, unless otherwise specified	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]
Balance at Dec. 31, 2013	$ 1,774,383	$ 106,882	$ 1,592	$ 1,608,117	$ 121,870	$ (56,924)	$ (7,154)
Comprehensive income	47,407				34,524	12,883
Dividends declared:
Preferred stock	(2,322)				(2,322)
Common stock: $0.12/share	(20,016)				(20,016)
Issuance of common stock	2,347		12	5,939	(228)		(3,376)
Issuance of common stock - acquisitions	81,397		67	81,330
Restricted stock compensation	567			567
Tax benefit of stock-based compensation	1,224			1,224
Balance at Mar. 31, 2014	1,884,987	106,882	1,671	1,697,177	133,828	(44,041)	(10,530)
Balance at Dec. 31, 2014	2,021,456	106,882	1,754	1,798,984	176,120	(46,003)	(16,281)
Comprehensive income	51,366				40,343	11,023
Dividends declared:
Preferred stock	(2,010)				(2,010)
Common stock: $0.12/share	(20,992)				(20,992)
Issuance of common stock	4,435		9	5,986			(1,560)
Restricted stock compensation	340			340
Tax benefit of stock-based compensation	681			681
Balance at Mar. 31, 2015	$ 2,055,276	$ 106,882	$ 1,763	$ 1,805,991	$ 193,461	$ (34,980)	$ (17,841)

XML

Comprehensive Income - Changes in AOCI, Net of Tax, by Component (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), balance at beginning of period	$ (46,003)
Other comprehensive income before reclassifications	11,543
Amounts reclassified from AOCI	(520)
Net current period other comprehensive income	11,023	12,883
Accumulated other comprehensive income (loss), balance at end of period	(34,980)
Unrealized Net Gains (Losses) on Securities Available for Sale [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), balance at beginning of period	(440)
Other comprehensive income before reclassifications	8,400
Amounts reclassified from AOCI	6
Net current period other comprehensive income	8,406
Accumulated other comprehensive income (loss), balance at end of period	7,966
Unrealized Net Gains (Losses) on Derivative Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), balance at beginning of period	(143)
Other comprehensive income before reclassifications	2,793
Amounts reclassified from AOCI	(526)
Net current period other comprehensive income	2,267
Accumulated other comprehensive income (loss), balance at end of period	2,124
Unrecognized Pension and Postretirement Obligations [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), balance at beginning of period	(45,420)
Other comprehensive income before reclassifications	350
Net current period other comprehensive income	350
Accumulated other comprehensive income (loss), balance at end of period	$ (45,070)

XML

Use of Estimates

3 Months Ended

Mar. 31, 2015

Accounting Policies [Abstract]

Use of Estimates

USE OF ESTIMATES

The accounting and reporting policies of the Corporation conform with GAAP. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could materially differ from those estimates. Material estimates that are particularly susceptible to significant changes include the allowance for credit losses, securities valuations, goodwill and other intangible assets and income taxes.

XML

Loans and Leases - Summary of Commercial Loans and Leases by Credit Quality (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Originated Loans and Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	$ 5,543,667	$ 5,407,427
Originated Loans and Leases [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	3,082,385	3,031,810
Originated Loans and Leases [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	2,281,075	2,197,793
Originated Loans and Leases [Member] | Commercial Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	180,207	177,824
Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	851,460	904,120
Acquired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	734,804	783,898
Acquired Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	116,656	120,222
Pass [Member] | Originated Loans and Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	5,327,699	5,151,400
Pass [Member] | Originated Loans and Leases [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	2,960,542	2,890,830
Pass [Member] | Originated Loans and Leases [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	2,190,066	2,085,893
Pass [Member] | Originated Loans and Leases [Member] | Commercial Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	177,091	174,677
Pass [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	682,436	714,122
Pass [Member] | Acquired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	579,462	610,260
Pass [Member] | Acquired Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	102,974	103,862
Special Mention [Member] | Originated Loans and Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	108,630	132,248
Special Mention [Member] | Originated Loans and Leases [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	52,926	58,630
Special Mention [Member] | Originated Loans and Leases [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	53,482	71,420
Special Mention [Member] | Originated Loans and Leases [Member] | Commercial Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	2,222	2,198
Special Mention [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	67,303	77,397
Special Mention [Member] | Acquired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	64,892	73,891
Special Mention [Member] | Acquired Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	2,411	3,506
Substandard [Member] | Originated Loans and Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	105,157	122,584
Substandard [Member] | Originated Loans and Leases [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	68,182	81,951
Substandard [Member] | Originated Loans and Leases [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	36,081	39,684
Substandard [Member] | Originated Loans and Leases [Member] | Commercial Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	894	949
Substandard [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	101,721	112,601
Substandard [Member] | Acquired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	90,450	99,747
Substandard [Member] | Acquired Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	11,271	12,854
Doubtful [Member] | Originated Loans and Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	2,181	1,195
Doubtful [Member] | Originated Loans and Leases [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	735	399
Doubtful [Member] | Originated Loans and Leases [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	$ 1,446	$ 796

XML

Stock Incentive Plans - Components of Restricted Stock Awards (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested awards	853,986	1,354,093	1,051,257	1,729,033
Unrecognized compensation expense	$ 4,509
Intrinsic value	11,221
Weighted average remaining life (in years)	1 year 9 months 22 days
Service-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested awards	397,593
Unrecognized compensation expense	2,659
Intrinsic value	5,224
Weighted average remaining life (in years)	1 year 10 months 28 days
Performance-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested awards	456,393
Unrecognized compensation expense	1,850
Intrinsic value	$ 5,997
Weighted average remaining life (in years)	1 year 8 months 23 days

XML

Borrowings - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Credit available with FHLB	$ 4,213,966
Credit with FHLB used	900,018
Federal Home Loan Bank advances are scheduled to mature periodically through the year	2021
Effective interest rates, minimum	0.76%	0.76%
Effective interest rates, maximum	4.19%	4.19%
Number of unconsolidated subsidiary trusts	2
Percent of the common equity of each Trust owned by the Corporation	100.00%
TPS Outstanding amount	58,259	58,246
Trust Preferred Securities Subject to Mandatory Redemption [Member]
Debt Instrument [Line Items]
Percentage of TPS moving from tier 1 capital to tier 2 capital for 2015	25.00%
TPS Outstanding amount	$ 57,500
Percentage of TPS moving from tier 1 capital to tier 2 capital for 2016	75.00%

XML

Fair Value Measurements

3 Months Ended

Mar. 31, 2015

Fair Value Disclosures [Abstract]

Fair Value Measurements

FAIR VALUE MEASUREMENTS

The Corporation uses fair value measurements to record fair value adjustments to certain financial assets and liabilities and to determine fair value disclosures. Securities available for sale and derivatives are recorded at fair value on a recurring basis. Additionally, from time to time, the Corporation may be required to record at fair value other assets on a non-recurring basis, such as mortgage loans held for sale, certain impaired loans, OREO and certain other assets.

Fair value is defined as an exit price, representing the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value measurements are not adjusted for transaction costs. Fair value is a market-based measure considered from the perspective of a market participant who holds the asset or owes the liability rather than an entity-specific measure.

In determining fair value, the Corporation uses various valuation approaches, including market, income and cost approaches. ASC 820, Fair Value Measurements and Disclosures, establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that observable inputs be used when available. Observable inputs are inputs that market participants would use in pricing the asset or liability, which are developed based on market data obtained from sources independent of the Corporation. Unobservable inputs reflect the Corporation’s assumptions about the assumptions that market participants would use in pricing an asset or liability, which are developed based on the best information available in the circumstances.

The fair value hierarchy gives the highest priority to unadjusted quoted market prices in active markets for identical assets or liabilities (Level 1 measurement) and the lowest priority to unobservable inputs (Level 3 measurement). The fair value hierarchy is broken down into three levels based on the reliability of inputs as follows:

Measurement Category	Definition
Level 1	valuation is based upon unadjusted quoted market prices for identical instruments traded in active markets.
Level 2	valuation is based upon quoted market prices for similar instruments traded in active markets, quoted market prices for identical or similar instruments traded in markets that are not active and model-based valuation techniques for which all significant assumptions are observable in the market or can be corroborated by market data.
Level 3	valuation is derived from other valuation methodologies including discounted cash flow models and similar techniques that use significant assumptions not observable in the market. These unobservable assumptions reflect estimates of assumptions that market participants would use in determining fair value.

A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement.

Following is a description of the valuation methodologies the Corporation uses for financial instruments recorded at fair value on either a recurring or non-recurring basis:

Securities Available For Sale

Securities available for sale consists of both debt and equity securities. These securities are recorded at fair value on a recurring basis. At March 31, 2015, 99.9% of these securities used valuation methodologies involving market-based or market-derived information, collectively Level 1 and Level 2 measurements, to measure fair value. The remaining 0.1% of these securities was measured using model-based techniques, with primarily unobservable (Level 3) inputs.

The Corporation closely monitors market conditions involving assets that have become less actively traded. If the fair value measurement is based upon recent observable market activity of such assets or comparable assets (other than forced or distressed transactions) that occur in sufficient volume, and do not require significant adjustment using unobservable inputs, those assets are classified as Level 1 or Level 2; if not, they are classified as Level 3. Making this assessment requires significant judgment.

The Corporation uses prices from independent pricing services and, to a lesser extent, indicative (non-binding) quotes from independent brokers, to measure the fair value of investment securities. The Corporation validates prices received from pricing services or brokers using a variety of methods, including, but not limited to, comparison to secondary pricing services, corroboration of pricing by reference to other independent market data such as secondary broker quotes and relevant benchmark indices, and review of pricing information by Corporate personnel familiar with market liquidity and other market-related conditions.

Derivative Financial Instruments

The Corporation determines its fair value for derivatives using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects contractual terms of the derivative, including the period to maturity and uses observable market based inputs, including interest rate curves and implied volatilities.

The Corporation incorporates credit valuation adjustments to appropriately reflect both its own non-performance risk and the respective counterparty’s non-performance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of non-performance risk, the Corporation considers the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts and guarantees.

Although the Corporation has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by itself and its counterparties. However, as of March 31, 2015, the Corporation has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivatives. As a result, the Corporation has determined that its derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy.

Residential Mortgage Loans Held For Sale

These loans are carried at the lower of cost or fair value. Under lower of cost or fair value accounting, periodically, it may be necessary to record non-recurring fair value adjustments. Fair value, when recorded, is based on independent quoted market prices and is classified as Level 2.

Impaired Loans

The Corporation reserves for commercial loan relationships greater than or equal to $500 that the Corporation considers impaired as defined in ASC 310 at the time the Corporation identifies the loan as impaired based upon the present value of expected future cash flows available to pay the loan, or based upon the fair value of the collateral less estimated selling costs where a loan is collateral dependent. Collateral may be real estate and/or business assets including equipment, inventory and accounts receivable.

The Corporation determines the fair value of real estate based on appraisals by licensed or certified appraisers. The value of business assets is generally based on amounts reported on the business’ financial statements. Management must rely on the financial statements prepared and certified by the borrower or its accountants in determining the value of these business assets on an ongoing basis, which may be subject to significant change over time. Based on the quality of information or statements provided, management may require the use of business asset appraisals and site-inspections to better value these assets. The Corporation may discount appraised and reported values based on management’s historical knowledge, changes in market conditions from the time of valuation or management’s knowledge of the borrower and the borrower’s business. Since not all valuation inputs are observable, the Corporation classifies these non-recurring fair value determinations as Level 2 or Level 3 based on the lowest level of input that is significant to the fair value measurement.

The Corporation reviews and evaluates impaired loans no less frequently than quarterly for additional impairment based on the same factors identified above.

Other Real Estate Owned

OREO is comprised of commercial and residential real estate properties obtained in partial or total satisfaction of loan obligations plus some bank owned real estate. OREO acquired in settlement of indebtedness is recorded at the lower of carrying amount of the loan or fair value less costs to sell. Subsequently, these assets are carried at the lower of carrying value or fair value less costs to sell. Accordingly, it may be necessary to record non-recurring fair value adjustments. Fair value is generally based upon appraisals by licensed or certified appraisers and other market information and is classified as Level 2 or Level 3.

The following table presents the balances of assets and liabilities measured at fair value on a recurring basis:

	Level 1		Level 2		Level 3		Total
March 31, 2015
Assets Measured at Fair Value
Available for sale debt securities:
U.S. Treasury	$	—	$	29,937	$	—	$	29,937
U.S. government-sponsored entities		—		390,660		—		390,660
Residential mortgage-backed securities:
Agency mortgage-backed securities		—		505,561		—		505,561
Agency collateralized mortgage obligations		—		572,017		—		572,017
Non-agency collateralized mortgage obligations		—		10		1,354		1,364
Commercial mortgage-backed securities		—		6,843		—		6,843
States of the U.S. and political subdivisions		—		13,175		—		13,175
Other debt securities		—		16,231		—		16,231
		—		1,534,434		1,354		1,535,788
Available for sale equity securities:
Financial services industry		91		645		435		1,171
Insurance services industry		121		—		—		121
		212		645		435		1,292
		212		1,535,079		1,789		1,537,080
Derivative financial instruments:
Trading		—		53,614		—		53,614
Not for trading		—		3,937		—		3,937
		—		57,551		—		57,551
	$	212	$	1,592,630	$	1,789	$	1,594,631
Liabilities Measured at Fair Value
Derivative financial instruments:
Trading		—	$	53,762		—	$	53,762
Not for trading		—		669		—		669
		—	$	54,431		—	$	54,431

	Level 1		Level 2		Level 3		Total
December 31, 2014
Assets Measured at Fair Value
Available for sale debt securities:
U.S. Treasury	$	—	$	29,682	$	—	$	29,682
U.S. government-sponsored entities		—		337,133		—		337,133
Residential mortgage-backed securities:
Agency mortgage-backed securities		—		554,085		—		554,085
Agency collateralized mortgage obligations		—		573,171		—		573,171
Non-agency collateralized mortgage obligations		—		11		1,420		1,431
Commercial mortgage-backed securities		—		7,880		—		7,880
States of the U.S. and political subdivisions		—		13,158		—		13,158
Other debt securities		—		16,178		—		16,178
		—		1,531,298		1,420		1,532,718
Available for sale equity securities:
Financial services industry		99		654		475		1,228
Insurance services industry		119		—		—		119
		218		654		475		1,347
		218		1,531,952		1,895		1,534,065
Derivative financial instruments:
Trading		—		43,789		—		43,789
Not for trading		—		2,109		—		2,109
		—		45,898		—		45,898
	$	218	$	1,577,850	$	1,895	$	1,579,963
Liabilities Measured at Fair Value
Derivative financial instruments:
Trading		—	$	43,830		—	$	43,830
Not for trading		—		2,330		—		2,330
		—	$	46,160		—	$	46,160

There were no transfers of assets or liabilities between the hierarchy levels for 2015 or 2014.

The following table presents additional information about assets measured at fair value on a recurring basis and for which the Corporation has utilized Level 3 inputs to determine fair value:

	Pooled Trust Preferred Collateralized Debt Obligations			Equity Securities			Residential Non-Agency Collateralized Mortgage Obligations			Total
Three Months Ended March 31, 2015
Balance at beginning of period		—		$	475		$	1,420		$	1,895
Total gains (losses) – realized/unrealized:
Included in earnings		—			—			—			—
Included in other comprehensive income		—			(40	)		(12	)		(52	)
Accretion included in earnings		—			—			1			1
Purchases, issuances, sales and settlements:
Purchases		—			—			—			—
Issuances		—			—			—			—
Sales/redemptions		—			—			—			—
Settlements		—			—			(55	)		(55	)
Transfers from Level 3		—			—			—			—
Transfers into Level 3		—			—			—			—
Balance at end of period		—		$	435		$	1,354		$	1,789
Year Ended December 31, 2014
Balance at beginning of period	$	31,595		$	410		$	1,744		$	33,749
Total gains (losses) – realized/unrealized:
Included in earnings		13,766			—			—			13,766
Included in other comprehensive income		5,608			65			3			5,676
Accretion included in earnings		657			—			5			662
Purchases, issuances, sales and settlements:
Purchases		—			—			—			—
Issuances		—			—			—			—
Sales/redemptions		(51,527	)		—			—			(51,527	)
Settlements		(99	)		—			(332	)		(431	)
Transfers from Level 3		—			—			—			—
Transfers into Level 3		—			—			—			—
Balance at end of period	$	—		$	475		$	1,420		$	1,895

The Corporation reviews fair value hierarchy classifications on a quarterly basis. Changes in the observability of the valuation attributes may result in reclassification of certain financial assets or liabilities. Such reclassifications are reported as transfers in/out of Level 3 at fair value at the beginning of the period in which the changes occur. See the Securities footnote in the Notes to Consolidated Financial Statements section of this Report for information relating to significant unobservable inputs used in determining Level 3 fair values.

For the three months ended March 31, 2015 and 2014, there were no gains or losses included in earnings attributable to the change in unrealized gains or losses relating to assets still held as of those dates. The total (losses) gains included in earnings are in the net securities (losses) gains line item in the Consolidated Statements of Comprehensive Income.

In accordance with GAAP, from time to time, the Corporation measures certain assets at fair value on a non-recurring basis. These adjustments to fair value usually result from the application of the lower of cost or fair value accounting or write-downs of individual assets. Valuation methodologies used to measure these fair value adjustments were previously described. For assets measured at fair value on a non-recurring basis still held at the balance sheet date, the following table provides the hierarchy level and the fair value of the related assets or portfolios:

	Level 1		Level 2		Level 3		Total
March 31, 2015
Impaired loans		—	$	190	$	693	$	883
Other real estate owned		—		977		1,433		2,410
December 31, 2014
Impaired loans		—		177		1,528		1,705
Other real estate owned		—		5,695		2,365		8,060

Impaired loans measured or re-measured at fair value on a non-recurring basis during the three months ended March 31, 2015 had a carrying amount of $2,940 and an allocated allowance for credit losses of $2,181. The allocated allowance is based on fair value of $883 less estimated costs to sell of $124. The allowance for credit losses includes a provision applicable to the current period fair value measurements of $1,002, which was included in the provision for credit losses for the three months ended March 31, 2015.

OREO with a carrying amount of $2,501 was written down to $2,140 (fair value of $2,410 less estimated costs to sell of $270), resulting in a loss of $361, which was included in earnings for the three months ended March 31, 2015.

Fair Value of Financial Instruments

The following methods and assumptions were used to estimate the fair value of each financial instrument:

Cash and Cash Equivalents, Accrued Interest Receivable and Accrued Interest Payable. For these short-term instruments, the carrying amount is a reasonable estimate of fair value.

Securities. For both securities available for sale and securities held to maturity, fair value equals the quoted market price from an active market, if available, and is classified within Level 1. If a quoted market price is not available, fair value is estimated using quoted market prices for similar securities or pricing models, and is classified as Level 2. Where there is limited market activity or significant valuation inputs are unobservable, securities are classified within Level 3. Under current market conditions, assumptions used to determine the fair value of Level 3 securities have greater subjectivity due to the lack of observable market transactions.

Loans and Leases. The fair value of fixed rate loans and leases is estimated by discounting the future cash flows using the current rates at which similar loans and leases would be made to borrowers with similar credit ratings and for the same remaining maturities less an illiquidity discount. The fair value of variable and adjustable rate loans and leases approximates the carrying amount. Due to the significant judgment involved in evaluating credit quality, loans and leases are classified within Level 3 of the fair value hierarchy.

Derivative Assets and Liabilities. The Corporation determines its fair value for derivatives using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects contractual terms of the derivative, including the period to maturity and uses observable market based inputs, including interest rate curves and implied volatilities.

The Corporation incorporates credit valuation adjustments to appropriately reflect both its own non-performance risk and the respective counterparty’s non-performance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of non-performance risk, the Corporation considers the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts and guarantees.

Although the Corporation has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by itself and its counterparties. However, as of March 31, 2015, the Corporation has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivatives. As a result, the Corporation has determined that its derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy.

Deposits. The estimated fair value of demand deposits, savings accounts and certain money market deposits is the amount payable on demand at the reporting date because of the customers’ ability to withdraw funds immediately. The fair value of fixed-maturity deposits is estimated by discounting future cash flows using rates currently offered for deposits of similar remaining maturities.

Short-Term Borrowings. The carrying amounts for short-term borrowings approximate fair value for amounts that mature in 90 days or less. The fair value of subordinated notes is estimated by discounting future cash flows using rates currently offered.

Long-Term Borrowings. The fair value of long-term borrowings is estimated by discounting future cash flows based on the market prices for the same or similar issues or on the current rates offered to the Corporation for debt of the same remaining maturities.

Loan Commitments and Standby Letters of Credit. Estimates of the fair value of these off-balance sheet items were not made because of the short-term nature of these arrangements and the credit standing of the counterparties. Also, unfunded loan commitments relate principally to variable rate commercial loans, typically are non-binding, and fees are not normally assessed on these balances.

Nature of Estimates. Many of the estimates presented herein are based upon the use of highly subjective information and assumptions and, accordingly, the results may not be precise. Management believes that fair value estimates may not be comparable to other financial institutions due to the wide range of permitted valuation techniques and numerous estimates which must be made. Further, because the disclosed fair value amounts were estimated as of the balance sheet date, the amounts actually realized or paid upon maturity or settlement of the various financial instruments could be significantly different.

The fair values of the Corporation’s financial instruments are as follows:

					Fair Value Measurements
	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
March 31, 2015
Financial Assets
Cash and cash equivalents	$	234,246	$	234,246	$	234,246	$	—	$	—
Securities available for sale		1,537,080		1,537,080		212		1,535,079		1,789
Securities held to maturity		1,513,204		1,536,449		—		1,532,588		3,861
Net loans and leases, including loans held for sale		11,280,221		11,119,711		—		—		11,119,711
Derivative assets		57,551		57,551		—		57,551		—
Accrued interest receivable		41,935		41,935		41,935		—		—
Financial Liabilities
Deposits		11,806,043		11,812,401		9,217,159		2,595,242		—
Short-term borrowings		1,740,500		1,740,499		1,740,499		—		—
Long-term borrowings		541,474		541,955		—		—		541,955
Derivative liabilities		54,431		54,431		—		54,431		—
Accrued interest payable		6,511		6,511		6,511		—		—
December 31, 2014
Financial Assets
Cash and cash equivalents	$	287,393	$	287,393	$	287,393	$	—	$	—
Securities available for sale		1,534,065		1,534,065		218		1,531,952		1,895
Securities held to maturity		1,453,355		1,468,258		—		1,463,945		4,313
Net loans and leases, including loans held for sale		11,127,292		10,956,544		—		—		10,956,544
Derivative assets		45,898		45,898		—		45,898		—
Accrued interest receivable		40,231		40,231		40,231		—		—
Financial Liabilities
Deposits		11,382,208		11,382,402		8,771,173		2,611,229		—
Short-term borrowings		2,041,658		2,041,672		2,041,672		—		—
Long-term borrowings		541,443		539,007		—		—		539,007
Derivative liabilities		46,160		46,160		—		46,160		—
Accrued interest payable		6,689		6,689		6,689		—		—

XML

Derivative and Hedging Activities - Offsetting of Derivative Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Gross Amount	$ 54,431	$ 46,160
Gross Amounts Offset in the Balance Sheet, Derivative Liabilities	0	0
Net Amount Presented in the Balance Sheet	54,431	46,160
Subject to Master Netting Arrangement [Member]
Derivatives, Fair Value [Line Items]
Net Amount Presented in the Balance Sheet	54,387	45,985
Subject to Master Netting Arrangement [Member] | Interest Rate Contracts [Member]
Derivatives, Fair Value [Line Items]
Gross Amount	669	2,330
Gross Amounts Offset in the Balance Sheet, Derivative Liabilities	0	0
Net Amount Presented in the Balance Sheet	669	2,330
Subject to Master Netting Arrangement [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Gross Amount	53,718	43,655
Gross Amounts Offset in the Balance Sheet, Derivative Liabilities	0	0
Net Amount Presented in the Balance Sheet	53,718	43,655
Not Subject to Master Netting Arrangement [Member]
Derivatives, Fair Value [Line Items]
Net Amount Presented in the Balance Sheet	44	175
Not Subject to Master Netting Arrangement [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Gross Amount	5	128
Gross Amounts Offset in the Balance Sheet, Derivative Liabilities	0	0
Net Amount Presented in the Balance Sheet	5	128
Not Subject to Master Netting Arrangement [Member] | Equity Contracts [Member]
Derivatives, Fair Value [Line Items]
Gross Amount	39	47
Gross Amounts Offset in the Balance Sheet, Derivative Liabilities	0	0
Net Amount Presented in the Balance Sheet	$ 39	$ 47

XML

Earnings Per Common Share (Tables)

3 Months Ended

Mar. 31, 2015

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings Per Common Share

The following table sets forth the computation of basic and diluted earnings per common share:

	Three Months Ended
	March 31,
	2015		2014
Net income	$	40,343	$	34,524
Less: Preferred stock dividends		2,010		2,322
Net income available to common stockholders	$	38,333	$	32,202
Basic weighted average common shares outstanding		174,152,283		162,186,395
Net effect of dilutive stock options, warrants, restricted stock and convertible debt		1,673,693		1,780,851
Diluted weighted average common shares outstanding		175,825,976		163,967,246
Earnings per common share:
Basic	$	0.22	$	0.20
Diluted	$	0.22	$	0.20

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Stock Incentive Plans

3 Months Ended

Mar. 31, 2015

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

Stock Incentive Plans

STOCK INCENTIVE PLANS

Restricted Stock

The Corporation issues restricted stock awards, consisting of both restricted stock and restricted stock units, to key employees under its Incentive Compensation Plans (Plans). The Corporation issues time-based awards and performance-based awards under these Plans, both of which are based on a three-year vesting period. The grant date fair value of the time-based awards is equal to the price of the Corporation’s common stock on the grant date. The fair value of the performance-based awards is based on a Monte-Carlo Simulation valuation of the Corporation’s common stock as of the grant date.

The Corporation did not issue any restricted stock awards during the three months ended March 31, 2015 or 2014. For performance-based restricted stock awards granted since 2014, the amount of shares recipients will earn is variable based on the Corporation’s total stockholder return relative to a specified peer group of financial institutions over the three-year period. These market-based restricted stock units are included in the table below as if the recipients earned shares equal to 100% of the units issued. As of March 31, 2015, the Corporation had available up to 2,122,522 shares of common stock to issue under the Plans.

The unvested restricted stock awards are eligible to receive cash dividends or dividend equivalents which are ultimately used to purchase additional shares of stock and are subject to forfeiture if the requisite service period is not completed or the specified performance criteria are not met. These awards are subject to certain accelerated vesting provisions upon retirement, death, disability or in the event of a change of control as defined in the award agreements.

Share-based compensation expense related to restricted stock awards was $340 and $532 for the three months ended March 31, 2015 and 2014, the tax benefit of which was $119 and $186, respectively.

The following table summarizes certain information concerning restricted stock awards:

	Three Months Ended March 31,
	2015					2014
	Awards			Weighted Average Grant Price		Awards			Weighted Average Grant Price
Unvested awards outstanding at beginning of period		1,354,093		$	11.86		1,729,033		$	10.23
Net adjustment due to performance		(46,956	)		10.25		(19,002	)		8.48
Vested		(458,450	)		10.60		(667,956	)		9.01
Forfeited		(2,357	)		17.93		(430	)		10.69
Dividend reinvestment		7,656			14.24		9,612			13.01
Unvested awards outstanding at end of period		853,986			12.63		1,051,257			11.06

The total fair value of awards vested was $5,740 and $8,631 for the three months ended March 31, 2015 and 2014, respectively.

As of March 31, 2015, there was $4,509 of unrecognized compensation cost related to unvested restricted stock awards, including $20 that is subject to accelerated vesting under the Plan’s immediate vesting upon retirement provision for awards granted prior to the adoption of ASC 718, Compensation – Stock Compensation. The components of the restricted stock awards as of March 31, 2015 are as follows:

	Service- Based Awards		Performance- Based Awards		Total
Unvested awards		397,593		456,393		853,986
Unrecognized compensation expense	$	2,659	$	1,850	$	4,509
Intrinsic value	$	5,224	$	5,997	$	11,221
Weighted average remaining life (in years)		1.91		1.73		1.81

Stock Options

All outstanding stock options were assumed from acquisitions and are fully vested. Upon consummation of the Corporation’s acquisitions, all outstanding stock options issued by the acquired companies were converted into equivalent Corporation stock options. The Corporation issues shares of treasury stock or authorized but unissued shares to satisfy stock options exercised. Shares issued upon the exercise of stock options were 60,094 and 59,217 for the three months ended March 31, 2015 and 2014, respectively.

The following table summarizes certain information concerning stock option awards:

	Three Months Ended March 31,
	2015					2014
	Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price
Options outstanding at beginning of period		568,834		$	8.86		533,524		$	11.50
Assumed from acquisition		—			—		304,785			5.77
Exercised		(60,094	)		5.04		(87,332	)		6.05
Forfeited		(2,182	)		4.34		(48,172	)		25.79
Options outstanding and exercisable at end of period		506,558			9.33		702,805			8.71

The intrinsic value of outstanding and exercisable stock options at March 31, 2015 was $1,890.

Warrants

In conjunction with its participation in the U.S. Department of the Treasury’s (UST) Capital Purchase Program (CPP), the Corporation issued to the UST a warrant to purchase up to 1,302,083 shares of the Corporation’s common stock. Pursuant to Section 13(H) of the Warrant to Purchase Common Stock, the number of shares of common stock issuable upon exercise of the warrant was reduced in half to 651,042 shares on June 16, 2009, the date the Corporation completed a public offering. The warrant, which expires in 2019, has an exercise price of $11.52 per share.

In conjunction with the Parkvale Financial Corporation (Parkvale) acquisition on January 1, 2012, the warrant issued by Parkvale to the UST under the CPP has been converted into a warrant to purchase up to 819,640 shares of the Corporation’s common stock. This warrant, which was recorded at its fair value on January 1, 2012, expires in 2018 and has an exercise price of $5.81 per share.

In conjunction with the Annapolis Bancorp, Inc. (ANNB) acquisition on April 6, 2013, the warrant issued by ANNB to the UST under the CPP has been converted into a warrant to purchase up to 342,564 shares of the Corporation’s common stock at an exercise price of $3.57 per share. Subsequent adjustments related to actual dividends paid by the Corporation have increased the share amount of these warrants to 367,916, with a resulting lower exercise price of $3.32 per share as of March 31, 2015. The warrant, which was recorded at its fair value on April 6, 2013, expires in 2019.