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 September 30, 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 October 31, 2015
Common Stock, $0.01 Par Value	175,377,201 Shares

F.N.B. CORPORATION

FORM 10-Q

September 30, 2015

INDEX

PART I – FINANCIAL INFORMATION		PAGE
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	46
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	69
Item 4.	Controls and Procedures	69
PART II – OTHER INFORMATION
Item 1.	Legal Proceedings	70
Item 1A.	Risk Factors	70
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	70
Item 3.	Defaults Upon Senior Securities	70
Item 4.	Mine Safety Disclosures	70
Item 5.	Other Information	70
Item 6.	Exhibits	71
Signatures		72

2

PART I – FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

F.N.B. CORPORATION AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

Dollars in thousands, except par value

	September 30, 2015			December 31, 2014
	(Unaudited)
Assets
Cash and due from banks	$	208,560		$	196,240
Interest bearing deposits with banks		50,206			91,153
Cash and Cash Equivalents		258,766			287,393
Securities available for sale		1,578,526			1,534,065
Securities held to maturity (fair value of $1,546,135 and $1,468,258)		1,526,290			1,453,355
Residential mortgage loans held for sale		3,575			6,180
Loans and leases, net of unearned income of $48,830 and $56,131		11,873,645			11,247,038
Allowance for credit losses		(136,183	)		(125,926	)
Net Loans and Leases		11,737,462			11,121,112
Premises and equipment, net		161,689			168,756
Goodwill		834,141			832,213
Core deposit and other intangible assets, net		46,417			47,504
Bank owned life insurance		306,061			301,771
Other assets		383,146			374,741
Total Assets	$	16,836,073		$	16,127,090
Liabilities
Deposits:
Non-interest bearing demand	$	2,911,435		$	2,647,623
Interest bearing demand		5,558,322			4,547,628
Savings		1,736,350			1,575,922
Certificates and other time deposits		2,553,629			2,611,035
Total Deposits		12,759,736			11,382,208
Short-term borrowings		1,287,302			2,041,658
Long-term borrowings		542,653			541,443
Other liabilities		151,633			140,325
Total Liabilities		14,741,324			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 – 176,513,189 and 175,450,303 shares		1,766			1,754
Additional paid-in capital		1,805,926			1,798,984
Retained earnings		227,287			176,120
Accumulated other comprehensive loss		(34,397	)		(46,003	)
Treasury stock – 1,149,750 and 1,458,045 shares at cost		(12,715	)		(16,281	)
Total Stockholders’ Equity		2,094,749			2,021,456
Total Liabilities and Stockholders’ Equity	$	16,836,073		$	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 September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Interest Income
Loans and leases, including fees	$	120,875	$	116,468	$	358,074	$	330,107
Securities:
Taxable		14,576		13,693		43,257		39,557
Nontaxable		1,707		1,356		4,564		3,934
Dividends		9		26		29		218
Other		30		23		90		70
Total Interest Income		137,197		131,566		406,014		373,886
Interest Expense
Deposits		7,948		7,457		23,033		22,067
Short-term borrowings		1,786		1,459		5,348		4,011
Long-term borrowings		2,262		2,031		6,744		5,172
Total Interest Expense		11,996		10,947		35,125		31,250
Net Interest Income		125,201		120,619		370,889		342,636
Provision for credit losses		10,777		11,197		27,777		28,608
Net Interest Income After Provision for Credit Losses		114,424		109,422		343,112		314,028
Non-Interest Income
Service charges		18,628		17,742		51,959		50,452
Trust fees		5,210		4,868		15,803		14,494
Insurance commissions and fees		4,423		4,169		12,351		12,805
Securities commissions and fees		3,304		3,132		9,958		8,525
Net securities gains		314		1,178		319		11,415
Mortgage banking operations		2,424		1,078		6,739		2,220
Bank owned life insurance		1,846		1,828		5,527		5,820
Other		5,210		3,557		16,637		13,081
Total Non-Interest Income		41,359		37,552		119,293		118,812
Non-Interest Expense
Salaries and employee benefits		51,859		49,590		151,559		147,008
Net occupancy		7,957		7,734		25,405		24,284
Equipment		8,237		7,625		23,583		21,701
Amortization of intangibles		2,034		2,455		6,148		7,199
Outside services		7,314		8,183		25,254		23,653
FDIC insurance		3,158		3,206		9,630		9,599
Merger and acquisition related		1,312		1,904		1,683		8,054
Other		16,278		15,150		46,041		41,099
Total Non-Interest Expense		98,149		95,847		289,303		282,597
Income Before Income Taxes		57,634		51,127		173,102		150,243
Income taxes		17,581		15,736		52,575		45,497
Net Income		40,053		35,391		120,527		104,746
Less: Preferred stock dividends		2,010		2,010		6,030		6,342
Net Income Available to Common Stockholders	$	38,043	$	33,381	$	114,497	$	98,404
Net Income per Common Share – Basic	$	0.22	$	0.20	$	0.65	$	0.60
Net Income per Common Share – Diluted		0.22		0.20		0.65		0.59
Cash Dividends per Common Share		0.12		0.12		0.36		0.36
Comprehensive Income	$	49,609	$	31,499	$	132,133	$	121,219

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								120,527			11,606						132,133
Dividends declared:
Preferred stock								(6,030	)								(6,030	)
Common stock: $0.36/share								(63,330	)								(63,330	)
Issuance of common stock				12		3,651								3,566			7,229
Restricted stock compensation						3,286											3,286
Tax benefit of stock-based compensation						5											5
Balance at September 30, 2015	$	106,882	$	1,766	$	1,805,926	$	227,287		$	(34,397	)	$	(12,715	)	$	2,094,749
Balance at January 1, 2014	$	106,882	$	1,592	$	1,608,117	$	121,870		$	(56,924	)	$	(7,154	)	$	1,774,383
Comprehensive income								104,746			16,473						121,219
Dividends declared:
Preferred stock								(6,342	)								(6,342	)
Common stock: $0.36/share								(60,234	)								(60,234	)
Issuance of common stock				16		9,007		(228	)					(7,377	)		1,418
Issuance of common stock - acquisitions				139		170,024											170,163
Restricted stock compensation						2,328											2,328
Tax benefit of stock-based compensation						2,198											2,198
Balance at September 30, 2014	$	106,882	$	1,747	$	1,791,674	$	159,812		$	(40,451	)	$	(14,531	)	$	2,005,133

See accompanying Notes to Consolidated Financial Statements

5

F.N.B. CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

Dollars in thousands

Unaudited

	Nine Months Ended September 30,
	2015			2014
Operating Activities
Net income	$	120,527		$	104,746
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization and accretion		31,412			29,007
Provision for credit losses		27,777			28,608
Deferred tax expense (benefit)		3,874			(2,533	)
Net securities gains		(319	)		(11,415	)
Tax benefit of stock-based compensation		(5	)		(2,198	)
Loans originated for sale		(336,776	)		(98,741	)
Loans sold		346,174			105,169
Gain on sale of loans		(6,794	)		(3,721	)
Net change in:
Interest receivable		(4,457	)		(1,590	)
Interest payable		(414	)		(1,058	)
Securities classified as trading in business combination and sold		—			241,595
Bank owned life insurance		(4,266	)		(5,205	)
Other, net		8,144			(4,165	)
Net cash flows provided by operating activities		184,877			378,499
Investing Activities
Net change in loans and leases		(657,586	)		(888,443	)
Securities available for sale:
Purchases		(279,636	)		(686,108	)
Sales		33,499			175,872
Maturities		212,140			245,942
Securities held to maturity:
Purchases		(279,998	)		(436,519	)
Sales		—			4,570
Maturities		203,689			153,624
Purchase of bank owned life insurance		(72,688	)		(16	)
Withdrawal/surrender of bank owned life insurance		72,664			18,715
Increase in premises and equipment		(7,304	)		(12,580	)
Net cash received in business combinations		148,159			60,035
Net cash flows used in investing activities		(627,061	)		(1,364,908	)
Financing Activities
Net change in:
Demand (non-interest bearing and interest bearing) and savings accounts		1,304,345			654,144
Time deposits		(78,764	)		(224,733	)
Short-term borrowings		(754,356	)		348,827
Increase in long-term borrowings		20,976			376,418
Decrease in long-term borrowings		(19,804	)		(87,677	)
Net proceeds from issuance of common stock		10,515			7,795
Tax benefit of stock-based compensation		5			2,198
Cash dividends paid:
Preferred stock		(6,030	)		(6,342	)
Common stock		(63,330	)		(60,234	)
Net cash flows provided by financing activities		413,557			1,010,396
Net (Decrease) Increase in Cash and Cash Equivalents		(28,627	)		23,987
Cash and cash equivalents at beginning of period		287,393			213,981
Cash and Cash Equivalents at End of Period	$	258,766		$	237,968

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)

September 30, 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, Pennsylvania, Baltimore, Maryland and Cleveland, Ohio. As of September 30, 2015, the Corporation had 289 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 September 30, 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.

DEBT OFFERING

On October 2, 2015, the Corporation completed its offering of $100,000 aggregate principal amount of 4.875% subordinated notes due in 2025. The subordinated notes will be treated as tier 2 capital for regulatory capital purposes. The net proceeds of the debt offering after deducting underwriting discounts and commissions and estimated offering expenses were $98,500. The Corporation intends to use the net proceeds from the sale of the subordinated notes for general corporate purposes, which may include investments at the holding company level, providing capital to support the growth of FNBPA and its business, repurchases of its common shares and the payment of the cash consideration components of future acquisitions.

7

MERGERS AND ACQUISITIONS

Branch Purchase – Bank of America

On September 18, 2015, the Corporation completed its purchase of five branch-banking locations in southeastern Pennsylvania from Bank of America, in which the Corporation acquired approximately $154,619 in deposits. The assets and liabilities relating to the branches purchased were recorded on the Corporation’s consolidated balance sheet at their preliminary fair values as of September 18, 2015, and the related results of operations for these branches have been included in the Corporation’s consolidated statement of comprehensive income since that date. Based on the preliminary purchase price allocation, the Corporation recorded $2,539 in goodwill and $3,081 in core deposit intangibles. These fair value estimates are provisional amounts based on third party valuations that are currently under review. The goodwill for this transaction is expected to be deductible for income tax purposes.

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 $390,160 in assets, $291,393 in loans and $295,922 in deposits. The acquisition was valued at $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 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 the purchase price allocation, the Corporation recorded $20,107 in goodwill and $4,304 in core deposit intangibles as a result of the acquisition. 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.

Pending Acquisition – Metro Bancorp, Inc.

On August 4, 2015, the Corporation entered into a definitive merger agreement to acquire Metro Bancorp, Inc. (METR), a bank holding company based in Harrisburg, Pennsylvania with approximately $3,001,357 in total assets. The transaction is valued at approximately $474,000. Under the terms of the merger agreement, METR shareholders will be entitled to receive 2.373 shares of the Corporation’s common stock for each share of METR common stock. The Corporation expects to issue approximately 33.6 million shares of its common stock in exchange for approximately 14.1 million shares of METR common stock. METR’s banking affiliate, Metro Bank, will be merged into FNBPA. The transaction is expected to be completed in the first quarter of 2016, pending regulatory approvals, the approval of shareholders of the Corporation and METR, and the satisfaction of other closing conditions.

Pending Branch Purchase – Fifth Third Bank

On September 3, 2015, the Corporation announced that it entered into a purchase and assumption agreement to acquire approximately $383,000 in retail and private banking deposits, 17 branch-banking locations and related consumer loans in the Pittsburgh, Pennsylvania area from Fifth Third Bank. The transaction is expected to close during the second quarter of 2016, pending regulatory approval.

8

NEW ACCOUNTING STANDARDS

Business Combinations – Simplifying the Accounting for Measurement-Period Adjustments

In September 2015, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2015-16, Business Combinations – Simplifying the Accounting for Measurement-Period Adjustments. ASU 2015-16 eliminates the requirement that an acquirer in a business combination account for measurement-period adjustments retrospectively. Instead, an acquirer must recognize measurement-period adjustments in the period in which it determines the amount of the adjustment, including the effect on earnings of any amounts that would have been recorded in previous periods if the accounting had been completed at the acquisition date. The guidance is effective for fiscal periods beginning after December 15, 2015, and interim periods within those fiscal years. Early adoption is permitted. The adoption of this update will not have a material effect on the financial statements, results of operations or liquidity of the Corporation.

Insurance – Disclosures about Short-Duration Contracts

In May 2015, the FASB issued ASU 2015-09, Financial Services – Insurance. ASU 2015-09 requires insurance entities that issue short-duration contracts to provide additional disclosures about the liability for unpaid claims and claim adjustment expenses, including disclosure of information about significant changes in methodologies and assumptions used to calculate the liability, reasons for the change, and the effects on the financial statements. These additional disclosures will increase the transparency of significant estimates made in measuring those liabilities, improve comparability by requiring consistent disclosure of information, and provide financial statement users with information to facilitate analysis. ASU 2015-09 should be applied retrospectively and is effective for annual periods beginning after December 15, 2015, and interim periods beginning after December 15, 2016, with early adoption permitted. 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.

Cloud Computing Arrangements

In April 2015, the FASB issued ASU 2015-05, Intangibles-Goodwill and Other-Internal-Use Software. ASU 2015-05 provides guidance about whether a cloud computing arrangement includes a license for internal use software, and how to account for the software license element of the arrangement. This update eliminates the existing requirement to analogize the guidance on leases in ASC 840 in accounting for some software licenses. ASU 2015-05 is 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 or the impact that the adoption of this update will have on its financial statements.

Interest – Imputation of Interest

In April 2015, the FASB issued ASU 2015-03, Interest – Imputation of Interest. ASU 2015-03 requires debt issuance costs to be presented in the balance sheet as a direct deduction from the corresponding debt liability. The recognition and measurement guidance for debt issuance costs is not affected by the amendments in this update. ASU 2015-03 is effective for reporting periods beginning after December 15, 2015, with early adoption permitted. A reporting entity should apply the new guidance on a retrospective basis, wherein the balance sheet of each individual period presented should be adjusted to reflect the period-specific effects of applying the new guidance. 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.

9

Consolidation

In February 2015, the FASB issued ASU 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 ASU is 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 2015-01, Income Statement – Extraordinary and Unusual Items. ASU 2015-01 simplified income statement presentation by eliminating from GAAP the concept of extraordinary items. The ASU is 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.

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
September 30, 2015
U.S. Treasury	$	29,704	$	300	$	—		$	30,004
U.S. government-sponsored entities		388,428		2,644		(305	)		390,767
Residential mortgage-backed securities:
Agency mortgage-backed securities		587,244		9,958		(82	)		597,120
Agency collateralized mortgage obligations		529,656		3,220		(4,948	)		527,928
Non-agency collateralized mortgage obligations		1,212		15		—			1,227
Commercial mortgage-backed securities		4,384		8		—			4,392
States of the U.S. and political subdivisions		10,927		345		—			11,272
Other debt securities		14,700		267		(414	)		14,553
Total debt securities		1,566,255		16,757		(5,749	)		1,577,263
Equity securities		975		288		—			1,263
	$	1,567,230	$	17,045	$	(5,749	)	$	1,578,526
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

10

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Securities Held to Maturity
September 30, 2015
U.S. Treasury	$	500	$	169	$	—		$	669
U.S. government-sponsored entities		146,528		1,964		(79	)		148,413
Residential mortgage-backed securities:
Agency mortgage-backed securities		669,221		15,887		(16	)		685,092
Agency collateralized mortgage obligations		462,191		3,556		(4,181	)		461,566
Non-agency collateralized mortgage obligations		3,055		15		—			3,070
Commercial mortgage-backed securities		17,334		468		—			17,802
States of the U.S. and political subdivisions		227,461		2,888		(826	)		229,523
	$	1,526,290	$	24,947	$	(5,102	)	$	1,546,135
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 September 30, 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					Nine Months Ended
	September 30,					September 30,
	2015		2014			2015			2014
Gross gains	$	314	$	1,191		$	328		$	19,939
Gross losses		—		(13	)		(9	)		(8,524	)
	$	314	$	1,178		$	319		$	11,415

During the first quarter of 2014, the Corporation strategically sold its 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 2016. Partially offsetting this gain was a net loss of $3,529 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.

11

As of September 30, 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	$	4,994	$	5,027	$	1,940	$	1,951
Due from one to five years		423,858		426,751		139,429		140,465
Due from five to ten years		10,013		10,338		71,708		73,681
Due after ten years		4,894		4,480		161,412		162,508
		443,759		446,596		374,489		378,605
Residential mortgage-backed securities:
Agency mortgage-backed securities		587,244		597,120		669,221		685,092
Agency collateralized mortgage obligations		529,656		527,928		462,191		461,566
Non-agency collateralized mortgage obligations		1,212		1,227		3,055		3,070
Commercial mortgage-backed securities		4,384		4,392		17,334		17,802
Equity securities		975		1,263		—		—
	$	1,567,230	$	1,578,526	$	1,526,290	$	1,546,135

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 September 30, 2015 and December 31, 2014, securities with a carrying value of $2,062,257 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 $258,428 and $892,647 at September 30, 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
September 30, 2015
U.S. government-sponsored entities		3	$	59,823	$	(177	)		3	$	37,867	$	(128	)		6	$	97,690	$	(305	)
Residential mortgage-backed securities:
Agency mortgage-backed securities		1		18,591		(82	)		—		—		—			1		18,591		(82	)
Agency collateralized mortgage obligations		4		63,640		(123	)		18		228,010		(4,825	)		22		291,650		(4,948	)
Other debt securities		—		—		—			3		4,480		(414	)		3		4,480		(414	)
		8	$	142,054	$	(382	)		24	$	270,357	$	(5,367	)		32	$	412,411	$	(5,749	)
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	)

12

	Less than 12 Months							12 Months or More							Total
	#		Fair Value		Unrealized Losses			#		Fair Value		Unrealized Losses			#		Fair Value		Unrealized Losses
Securities Held to Maturity
September 30, 2015
U.S. government-sponsored entities		—	$	—	$	—			1	$	14,921	$	(79	)		1	$	14,921	$	(79	)
Residential mortgage-backed securities:
Agency mortgage-backed securities		—		—		—			1		924		(16	)		1		924		(16	)
Agency collateralized mortgage obligations		3		46,120		(212	)		14		170,359		(3,969	)		17		216,479		(4,181	)
States of the U.S. and political subdivisions		24		46,933		(826	)		—		—		—			24		46,933		(826	)
		27	$	93,053	$	(1,038	)		16	$	186,204	$	(4,064	)		43	$	279,257	$	(5,102	)
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 that 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 three 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 $4,894 and $4,480 at September 30, 2015, respectively. The Corporation has concluded from its analysis performed at September 30, 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 Nine Months Ended September 30, 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 Nine Months Ended September 30, 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 nine months ended September 30, 2015 or 2014.

States of the U.S. and Political Subdivisions

The Corporation’s municipal bond portfolio of $238,733 as of September 30, 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 99.8% of the portfolio. Geographically, municipal bonds support the Corporation’s primary footprint as 93.6% 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 $1,492. In addition to the strong stand-alone ratings, 83.0% 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.

13

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 September 30, 2015 and December 31, 2014, the Corporation’s FHLB stock totaled $44,845 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 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.

LOANS AND LEASES

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

	Originated Loans		Acquired Loans		Total Loans and Leases
September 30, 2015
Commercial real estate	$	3,322,669	$	626,577	$	3,949,246
Commercial and industrial		2,410,186		81,169		2,491,355
Commercial leases		199,130		—		199,130
Total commercial loans and leases		5,931,985		707,746		6,639,731
Direct installment		1,643,345		49,293		1,692,638
Residential mortgages		1,013,254		373,132		1,386,386
Indirect installment		973,216		812		974,028
Consumer lines of credit		1,003,278		123,724		1,127,002
Other		53,860		—		53,860
	$	10,618,938	$	1,254,707	$	11,873,645
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.

14

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 $181,298 or 1.5% of total loans and leases at September 30, 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 September 30, 2015, 38.9% of the commercial real estate loans were owner-occupied, while the remaining 61.1% were non-owner-occupied, compared to 41.6% and 58.4%, respectively, as of December 31, 2014. As of September 30, 2015 and December 31, 2014, the Corporation had commercial construction loans of $294,249 and $296,156, respectively, representing 2.5% 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:

	September 30, 2015		December 31, 2014
Accounted for under ASC 310-30:
Outstanding balance	$	1,345,685	$	1,597,558
Carrying amount		1,094,604		1,344,171
Accounted for under ASC 310-20:
Outstanding balance		159,695		242,488
Carrying amount		153,539		228,748
Total acquired loans:
Outstanding balance		1,505,380		1,840,046
Carrying amount		1,248,143		1,572,919

The carrying amount of purchased credit impaired loans included in the table above totaled $8,766 at September 30, 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.

	Nine Months Ended
	September 30,
	2015			2014
Balance at beginning of period	$	331,899		$	305,646
Acquisitions		—			71,111
Reduction due to unexpected early payoffs		(35,601	)		(34,747	)
Reclass from non-accretable difference		24,489			9,925
Disposals/transfers		(509	)		(5,390	)
Accretion		(46,207	)		(54,664	)
Balance at end of period	$	274,071		$	291,881

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.

15

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, or when the full amount of principal and interest due is not expected to be collected in full, 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:

	September 30, 2015			December 31, 2014
Non-accrual loans	$	47,298		$	45,113
Troubled debt restructurings		21,221			23,439
Total non-performing loans		68,519			68,552
Other real estate owned (OREO)		38,931			41,466
Total non-performing assets	$	107,450		$	110,018
Asset quality ratios:
Non-performing loans as a percent of total loans and leases		0.58	%		0.61	%
Non-performing loans + OREO as a percent of total loans and leases + OREO		0.90	%		0.97	%
Non-performing assets as a percent of total assets		0.64	%		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 $4,285 at September 30, 2015. Also, the recorded investment of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process at September 30, 2015 amounted to $12,786.

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
September 30, 2015
Commercial real estate	$	6,040	$	3	$	25,262	$	31,305	$	3,291,364	$	3,322,669
Commercial and industrial		3,854		3		9,529		13,386		2,396,800		2,410,186
Commercial leases		709		14		835		1,558		197,572		199,130
Total commercial loans and leases		10,603		20		35,626		46,249		5,885,736		5,931,985
Direct installment		9,874		3,326		4,718		17,918		1,625,427		1,643,345
Residential mortgages		11,121		1,334		2,971		15,426		997,828		1,013,254
Indirect installment		8,213		522		1,133		9,868		963,348		973,216
Consumer lines of credit		3,385		629		988		5,002		998,276		1,003,278
Other		134		169		—		303		53,557		53,860
	$	43,330	$	6,000	$	45,436	$	94,766	$	10,524,172	$	10,618,938
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

16

	30-89 Days Past Due		> 90 Days Past Due and Still Accruing		Non-Accrual		Total Past Due (1) (2)		Current		Discount			Total Loans
Acquired Loans
September 30, 2015
Commercial real estate	$	10,510	$	11,108	$	1,303	$	22,921	$	641,768	$	(38,112	)	$	626,577
Commercial and industrial		686		527		107		1,320		87,163		(7,314	)		81,169
Total commercial loans		11,196		11,635		1,410		24,241		728,931		(45,426	)		707,746
Direct installment		670		834		—		1,504		46,981		808			49,293
Residential mortgages		8,607		15,261		—		23,868		386,425		(37,161	)		373,132
Indirect installment		26		11		—		37		801		(26	)		812
Consumer lines of credit		1,105		810		452		2,367		125,150		(3,793	)		123,724
	$	21,604	$	28,551	$	1,862	$	52,017	$	1,288,288	$	(85,598	)	$	1,254,707
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 September 30, 2015 and December 31, 2014.

(2) Acquired loans are considered performing upon acquisition, regardless of whether the customer is contractually delinquent, as long as the Corporation can reasonably estimate the timing and amount of expected cash flows on such loans. In these instances, 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. Acquired loans are considered non-accrual or non-performing when, due to credit deterioration or other factors, the Corporation determines it is no longer able to reasonably estimate the timing and amount of expected cash flows on such loans. The Corporation does not recognize interest income on acquired loans considered non-accrual or non-performing.

17

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
September 30, 2015
Commercial real estate	$	3,195,455	$	60,727	$	65,568	$	919	$	3,322,669
Commercial and industrial		2,259,932		103,650		45,014		1,590		2,410,186
Commercial leases		194,783		3,149		1,198		—		199,130
	$	5,650,170	$	167,526	$	111,780	$	2,509	$	5,931,985
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
September 30, 2015
Commercial real estate	$	488,840	$	49,669	$	88,068		—	$	626,577
Commercial and industrial		69,036		1,969		10,164		—		81,169
	$	557,876	$	51,638	$	98,232		—	$	707,746
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 September 30, 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.

18

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

	Consumer Loan Credit Quality by Payment Status
	Performing		Non-Performing		Total
September 30, 2015
Direct installment	$	1,630,566	$	12,779	$	1,643,345
Residential mortgages		1,000,774		12,480		1,013,254
Indirect installment		971,936		1,280		973,216
Consumer lines of credit		1,000,929		2,349		1,003,278
Other		53,860		—		53,860
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 Nine Months Ended September 30, 2015
Commercial real estate	$	35,733	$	25,035	$	2,057	$	27,092	$	919	$	26,928
Commercial and industrial		10,981		4,770		5,107		9,877		1,590		9,565
Commercial leases		835		835		—		835		—		767
Total commercial loans and leases		47,549		30,640		7,164		37,804		2,509		37,260
Direct installment		13,569		12,779		—		12,779		—		13,538
Residential mortgages		12,971		12,480		—		12,480		—		13,744
Indirect installment		3,220		1,280		—		1,280		—		1,168
Consumer lines of credit		2,565		2,349		—		2,349		—		2,134
	$	79,874	$	59,528	$	7,164	$	66,692	$	2,509	$	67,844
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
	$	81,765	$	66,619	$	2,831	$	69,450	$	1,179	$	75,367

19

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 $3,056; commercial and industrial of $579; direct installment of $1,427; residential mortgages of $558; indirect installment of $302; and consumer lines of credit of $642, totaling $6,564 at September 30, 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 originated TDRs:

	September 30, 2015		December 31, 2014
Accruing:
Performing	$	14,692	$	9,441
Non-performing		21,221		23,439
Non-accrual		7,800		8,272
	$	43,713	$	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 nine months ended September 30, 2015, the Corporation returned to performing status $7,577 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 $438 and $371 at September 30, 2015 and December 31, 2014, respectively, and pooled reserves for individual loans under $500 of $1,146 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 $3,350 and $3,448 at September 30, 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.

20

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

	Three Months Ended September 30, 2015						Nine Months Ended September 30, 2015
	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	$	168
Commercial and industrial		—		—		—		1		5		4
Total commercial loans		—		—		—		3		317		172
Direct installment		121		1,757		1,726		361		5,064		4,835
Residential mortgages		10		232		233		31		1,048		1,074
Indirect installment		3		13		10		13		43		40
Consumer lines of credit		10		146		143		40		666		610
		144	$	2,148	$	2,112		448	$	7,138	$	6,731
	Three Months Ended September 30, 2014						Nine Months Ended September 30, 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		1	$	50	$	48		10	$	2,633	$	2,187
Commercial and industrial		2		126		119		3		323		307
Total commercial loans		3		176		167		13		2,956		2,494
Direct installment		116		1,323		1,240		378		4,922		4,693
Residential mortgages		9		480		470		33		1,847		1,784
Indirect installment		7		18		15		20		52		48
Consumer lines of credit		6		88		56		31		899		857
		141	$	2,085	$	1,948		475	$	10,676	$	9,876

Following is a summary of originated 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 September 30, 2015 (1)				Nine Months Ended September 30, 2015 (1)
	Number of Contracts		Recorded Investment		Number of Contracts		Recorded Investment
Commercial real estate		—	$	—		—	$	—
Commercial and industrial		—		—		1		204
Total commercial loans		—		—		1		204
Direct installment		22		87		75		254
Residential mortgages		2		75		5		179
Indirect installment		1		6		6		12
Consumer lines of credit		—		—		1		8
		25	$	168		88	$	657

21

	Three Months Ended September 30, 2014 (1)				Nine Months Ended September 30, 2014 (1)
	Number of Contracts		Recorded Investment		Number of Contracts		Recorded Investment
Direct installment		41	$	356		80	$	732
Residential mortgages		2		33		2		33
Indirect installment		3		10		4		11
Consumer lines of credit		1		50		1		50
		47	$	449		87	$	826

(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.

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.

22

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 September 30, 2015
Commercial real estate	$	39,872	$	(1,259	)	$	370	$	(889	)	$	2,870		$	41,853
Commercial and industrial		32,305		(584	)		290		(294	)		3,223			35,234
Commercial leases		2,223		(124	)		50		(74	)		265			2,414
Total commercial loans and leases		74,400		(1,967	)		710		(1,257	)		6,358			79,501
Direct installment		22,279		(2,722	)		565		(2,157	)		1,214			21,336
Residential mortgages		8,579		(268	)		14		(254	)		341			8,666
Indirect installment		8,909		(1,650	)		264		(1,386	)		2,090			9,613
Consumer lines of credit		9,118		(472	)		56		(416	)		871			9,573
Other		911		(402	)		8		(394	)		413			930
Total allowance on originated loans and leases		124,196		(7,481	)		1,617		(5,864	)		11,287			129,619
Purchased credit-impaired loans		658		—			—		—			36			695
Other acquired loans		6,287		(153	)		282		129			(546	)		5,869
Total allowance on acquired loans		6,945		(153	)		282		129			(510	)		6,564
Total allowance	$	131,141	$	(7,634	)	$	1,899	$	(5,735	)	$	10,777		$	136,183
Nine Months Ended September 30, 2015
Commercial real estate	$	37,588	$	(3,237	)	$	779	$	(2,458	)	$	6,723		$	41,853
Commercial and industrial		32,645		(2,684	)		1,386		(1,298	)		3,887			35,234
Commercial leases		2,398		(328	)		95		(233	)		249			2,414
Total commercial loans and leases		72,631		(6,249	)		2,260		(3,989	)		10,859			79,501
Direct installment		20,538		(8,108	)		1,131		(6,977	)		7,775			21,336
Residential mortgages		8,024		(891	)		53		(838	)		1,480			8,666
Indirect installment		7,504		(4,433	)		898		(3,535	)		5,644			9,613
Consumer lines of credit		8,496		(1,205	)		132		(1,073	)		2,150			9,573
Other		759		(1,062	)		44		(1,018	)		1,189			930
Total allowance on originated loans and leases		117,952		(21,948	)		4,518		(17,430	)		29,097			129,619
Purchased credit-impaired loans		660		(64	)		19		(45	)		80			695
Other acquired loans		7,314		(698	)		653		(45	)		(1,400	)		5,869
Total allowance on acquired loans		7,974		(762	)		672		(90	)		(1,320	)		6,564
Total allowance	$	125,926	$	(22,710	)	$	5,190	$	(17,520	)	$	27,777		$	136,183

23

	Balance at Beginning of Period		Charge- Offs			Recoveries			Net Charge- Offs			Provision for credit losses			Balance at End of Period
Three Months Ended September 30, 2014
Commercial real estate	$	38,478	$	(1,724	)	$	506		$	(1,218	)	$	(80	)	$	37,180
Commercial and industrial		33,017		(1,796	)		192			(1,604	)		2,883			34,296
Commercial leases		2,079		(167	)		11			(156	)		282			2,205
Total commercial loans and leases		73,574		(3,687	)		709			(2,978	)		3,085			73,681
Direct installment		16,844		(2,369	)		271			(2,098	)		4,814			19,560
Residential mortgages		5,506		(87	)		13			(74	)		1,218			6,650
Indirect installment		6,693		(898	)		211			(687	)		364			6,370
Consumer lines of credit		7,664		(360	)		50			(310	)		587			7,941
Other		907		(341	)		9			(332	)		(208	)		367
Total allowance on originated loans and leases		111,188		(7,742	)		1,263			(6,479	)		9,860			114,569
Purchased credit-impaired loans		448		(712	)		1			(711	)		1,026			763
Other acquired loans		5,112		(113	)		(41	)		(154	)		311			5,269
Total allowance on acquired loans		5,560		(825	)		(40	)		(865	)		1,337			6,032
Total allowance	$	116,748	$	(8,567	)	$	1,223		$	(7,344	)	$	11,197		$	120,601
Nine Months Ended September 30, 2014
Commercial real estate	$	32,548	$	(5,519	)	$	1,068		$	(4,451	)	$	9,083		$	37,180
Commercial and industrial		32,603		(2,849	)		730			(2,119	)		3,812			34,296
Commercial leases		1,903		(317	)		93			(224	)		526			2,205
Total commercial loans and leases		67,054		(8,685	)		1,891			(6,794	)		13,421			73,681
Direct installment		17,824		(7,154	)		821			(6,333	)		8,069			19,560
Residential mortgages		5,836		(356	)		61			(295	)		1,109			6,650
Indirect installment		6,409		(2,396	)		658			(1,738	)		1,699			6,370
Consumer lines of credit		7,231		(1,023	)		143			(880	)		1,590			7,941
Other		530		(910	)		19			(891	)		728			367
Total allowance on originated loans and leases		104,884		(20,524	)		3,593			(16,931	)		26,616			114,569
Purchased credit-impaired loans		1,000		(2,614	)		1			(2,613	)		2,376			763
Other acquired loans		4,900		(230	)		983			753			(384	)		5,269
Total allowance on acquired loans		5,900		(2,844	)		984			(1,860	)		1,992			6,032
Total allowance	$	110,784	$	(23,368	)	$	4,577		$	(18,791	)	$	28,608		$	120,601

24

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
September 30, 2015
Commercial real estate	$	919	$	40,934	$	3,322,669	$	14,182	$	3,308,487
Commercial and industrial		1,590		33,644		2,410,186		6,186		2,404,000
Commercial leases		—		2,414		199,130		—		199,130
Total commercial loans and leases		2,509		76,992		5,931,985		20,368		5,911,617
Direct installment		—		21,336		1,643,345		—		1,643,345
Residential mortgages		—		8,666		1,013,254		—		1,013,254
Indirect installment		—		9,613		973,216		—		973,216
Consumer lines of credit		—		9,573		1,003,278		—		1,003,278
Other		—		930		53,860		—		53,860
	$	2,509	$	127,110	$	10,618,938	$	20,368	$	10,598,570
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:

	September 30, 2015		December 31, 2014
Securities sold under repurchase agreements	$	256,320	$	882,696
Federal Home Loan Bank advances		450,000		820,000
Federal funds purchased		456,000		210,000
Subordinated notes		124,982		128,962
	$	1,287,302	$	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.

25

Following is a summary of long-term borrowings:

	September 30, 2015		December 31, 2014
Federal Home Loan Bank advances	$	400,017	$	400,042
Subordinated notes		84,351		83,155
Junior subordinated debt		58,285		58,246
	$	542,653	$	541,443

The Corporation’s banking affiliate has available credit with the FHLB of $4,467,170 of which $850,017 was used as of September 30, 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 nine months ended September 30, 2015 and the year ended December 31, 2014.

The Corporation had two unconsolidated subsidiary trusts as of September 30, 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 September 30, 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 September 30, 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		1.99	%	Variable; 3-month LIBOR + 165 basis points (bps)
Omega Financial Capital Trust I		36,000		1,114		36,120		10/18/34		2.48	%	Variable; 3-month LIBOR + 219 bps
	$	57,500	$	1,779	$	58,285

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.

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

	September 30, 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	$	250,000	$	4,918	$	855	$	200,000	$	2,109	$	2,330
Interest rate swaps – not designated		1,193,598		1		61,753		972,002		140		43,655
Equity contracts – not designated		1,180		12		—		1,210		47		—
Total subject to master netting arrangements		1,444,778		4,931		62,608		1,173,212		2,296		45,985
Not subject to master netting arrangements:
Interest rate swaps – not designated		1,193,598		61,348		1		972,002		43,602		128
Credit risk contracts – not designated		111,976		14		185		68,632		—		—
Equity contracts – not designated		1,180		—		12		1,210		—		47
Total not subject to master netting arrangements		1,306,754		61,362		198		1,041,844		43,602		175
	$	2,751,532	$	66,293	$	62,806	$	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 certain commercial loans and one of its FHLB advances 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 September 30, 2015 and December 31, 2014, the notional amount of these interest rate derivative agreements totaled $250,000 and $200,000, respectively. Fair values included in other assets and other liabilities on the consolidated balance sheet applicable to these agreements amounted to $4,918 and $855, respectively, at September 30, 2015, and $2,109 and $2,330, respectively, at December 31, 2014. For the nine months ended September 30, 2015, the amount reclassified from accumulated other comprehensive income (AOCI) to interest income and interest expense totaled $2,440 ($1,586 net of tax) and $115 ($75 net of tax), respectively.

As of September 30, 2015, the maximum length of time over which forecasted interest cash flows are hedged is eight years. In the twelve months that follow September 30, 2015, the Corporation expects to reclassify from the amount currently reported in AOCI net derivative gains of $2,219 ($1,443 net of tax), in association with interest on the hedged loans and FHLB advance. 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 September 30, 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 nine months ended September 30, 2015 and 2014, there was no hedge ineffectiveness. Also, during the nine months ended September 30, 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.

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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 only with 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 $1,193,598 at September 30, 2015. Fair values included in other assets and other liabilities on the consolidated balance sheet applicable to these agreements amounted to $61,349 and $61,754, respectively, at September 30, 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 $74,010 as of September 30, 2015 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 $185 at September 30, 2015 and $25 at December 31, 2014.

The fair values of risk participation agreements purchased and sold were not material at September 30, 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 $1,816 and $1,862 as of September 30, 2015 and December 31, 2014, respectively, in excess of amounts previously posted as collateral with the respective counterparty.

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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
September 30, 2015
Derivative Assets
Subject to master netting arrangements:
Interest rate contracts
Designated	$	4,918		—	$	4,918
Not designated		1		—		1
Equity contracts – not designated		12		—		12
Not subject to master netting arrangements:
Interest rate contracts – not designated		61,348		—		61,348
Credit contracts – not designated		14		—		14
	$	66,293		—	$	66,293
Derivative Liabilities
Subject to master netting arrangements:
Interest rate contracts
Designated	$	855		—	$	855
Not designated		61,753		—		61,753
Not subject to master netting arrangements:
Interest rate contracts – not designated		1		—		1
Credit contracts – not designated		185		—		185
Equity contracts – not designated		12		—		12
	$	62,806		—	$	62,806
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

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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 the Balance Sheet		Amount Not Offset in the Balance Sheet
			Financial Instruments		Cash Collateral		Net Amount
September 30, 2015
Derivative Assets
Interest rate contracts:
Designated	$	4,918	$	2,557	$	2,361		—
Not designated		1		1		—		—
Equity contracts – not designated		12		12		—		—
	$	4,931	$	2,570	$	2,361		—
Derivative Liabilities
Interest rate contracts:
Designated	$	855	$	—	$	—	$	855
Not designated		61,753		31,827		28,290		1,636
	$	62,608	$	31,827	$	28,290	$	2,491
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 certain of the Corporation’s derivative financial instruments on the income statement:

	Income	Nine Months Ended
	Statement	September 30,
	Location	2015			2014
Interest Rate Contracts	Interest income - loans and leases	$	2,440		$	2,479
Interest Rate Contracts	Interest expense – short-term borrowings		115			—
Interest Rate Swaps	Other income		(364	)		(9	)
Credit Risk Contracts	Other income		(170	)		—

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 September 30, 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:

	September 30, 2015		December 31, 2014
Commitments to extend credit	$	3,527,479	$	3,665,481
Standby letters of credit		97,875		121,186

At September 30, 2015, funding of 75.3% 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.

In addition, debt issued by FNB Financial Services, LP, a wholly-owned finance subsidiary, is fully and unconditionally guaranteed by the Corporation.

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.

For the nine months ended September 30, 2015 and 2014, the Corporation issued 402,947 and 364,065 restricted stock awards, respectively, with aggregated grant date fair values of $5,302 and $4,954 under these plans. For performance-based restricted stock awards granted, 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.

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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 September 30, 2015, the Corporation had available up to 2,072,110 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 $3,287 and $2,294 for the nine months ended September 30, 2015 and 2014, the tax benefit of which was $1,150 and $803, respectively.

The following table summarizes certain information concerning restricted stock awards:

	Nine Months Ended September 30,
	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
Granted		402,947			13.16		364,065			13.61
Net adjustment due to performance		8,884			22.73		(87,512	)		11.41
Vested		(471,997	)		10.66		(703,428	)		8.79
Forfeited		(29,428	)		13.46		(50,849	)		11.47
Dividend reinvestment		30,551			11.32		34,521			12.73
Unvested awards outstanding at end of period		1,295,050			12.73		1,285,830			11.90

The total fair value of awards vested was $5,912 and $10,670 for the nine months ended September 30, 2015 and 2014, respectively.

As of September 30, 2015, there was $6,993 of unrecognized compensation cost related to unvested restricted stock awards, including $70 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 September 30, 2015 are as follows:

	Service- Based Awards		Performance- Based Awards		Total
Unvested awards		648,154		646,896		1,295,050
Unrecognized compensation expense	$	4,458	$	2,535	$	6,993
Intrinsic value	$	8,394	$	8,377	$	16,771
Weighted average remaining life (in years)		2.11		1.99		2.05

Stock Options

All outstanding stock options were assumed in connection with certain of the Corporation’s completed acquisitions and are fully vested. Upon consummation of those 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 88,899 and 99,284 for the nine months ended September 30, 2015 and 2014, respectively.

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The following table summarizes certain information concerning stock option awards:

	Nine Months Ended September 30,
	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 acquisitions		—			—		805,507			7.39
Exercised		(88,899	)		5.61		(140,817	)		6.21
Forfeited		(2,182	)		4.34		(54,962	)		24.41
Options outstanding and exercisable at end of period		477,753			9.48		1,143,252			8.64

The intrinsic value of outstanding and exercisable stock options at September 30, 2015 was $1,522.

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, was sold at auction by the UST and 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, was sold at auction by the UST and was exercised at $5.81 per share during the second quarter of 2015.

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 374,221, with a resulting lower exercise price of $3.27 per share as of September 30, 2015. The warrant, which was recorded at its fair value on April 6, 2013, was sold at auction by the UST and 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 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						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Service cost	$	18		$	15		$	52		$	47
Interest cost		1,470			1,610			4,424			4,802
Expected return on plan assets		(2,491	)		(2,486	)		(7,473	)		(7,460	)
Amortization:
Unrecognized net transition asset		—			(6	)		—			(16	)
Unrecognized prior service cost		2			2			6			6
Unrecognized loss		518			347			1,590			1,021
Net periodic pension credit	$	(483	)	$	(518	)	$	(1,401	)	$	(1,600	)

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 $5,794 and $7,595 for the nine months ended September 30, 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 September 30, 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 September 30, 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						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Net income	$	40,053		$	35,391		$	120,527		$	104,746
Other comprehensive income (loss):
Securities available for sale:
Unrealized gains (losses) arising during the period, net of tax expense (benefit) of $3,649, $(1,551), $4,302 and $10,399		6,777			(2,881	)		7,989			19,312
Reclassification adjustment for gains included in net income, net of tax expense of $110, $412, $112 and $3,995		(204	)		(766	)		(207	)		(7,420	)
Derivative instruments:
Unrealized gains arising during the period, net of tax expense of $1,709, $40, $2,353 and $2,979		3,174			74			4,370			5,532
Reclassification adjustment for gains included in net income, net of tax expense of $286, $293, $854 and $867		(531	)		(543	)		(1,586	)		(1,610	)
Pension and postretirement benefit obligations:
Unrealized gains arising during the period, net of tax expense of $183, $121, $560 and $355		340			224			1,040			659
Other comprehensive income (loss)		9,556			(3,892	)		11,606			16,473
Comprehensive income	$	49,609		$	31,499		$	132,133		$	121,219

The amounts reclassified from AOCI related to securities available for sale are included in net securities 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 taxes 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
Nine Months Ended September 30, 2015
Balance at beginning of period	$	(440	)	$	(143	)	$	(45,420	)	$	(46,003	)
Other comprehensive income before reclassifications		7,989			4,370			1,040			13,399
Amounts reclassified from AOCI		(207	)		(1,586	)		—			(1,793	)
Net current period other comprehensive income		7,782			2,784			1,040			11,606
Balance at end of period	$	7,342		$	2,641		$	(44,380	)	$	(34,397	)

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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				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Net income	$	40,053	$	35,391	$	120,527	$	104,746
Less: Preferred stock dividends		2,010		2,010		6,030		6,342
Net income available to common stockholders	$	38,043	$	33,381	$	114,497	$	98,404
Basic weighted average common shares outstanding		175,343,789		167,260,386		174,816,692		165,229,206
Net effect of dilutive stock options, warrants, restricted stock and convertible debt		1,169,043		1,623,741		1,383,450		1,695,637
Diluted weighted average common shares outstanding		176,512,832		168,884,127		176,200,142		166,924,843
Earnings per common share:
Basic	$	0.22	$	0.20	$	0.65	$	0.60
Diluted	$	0.22	$	0.20	$	0.65	$	0.59

For the three months ended September 30, 2015 and 2014, 19,385 and 32,419 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. For the nine months ended September 30, 2015 and 2014, 20,440 and 38,151 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:

Nine Months Ended September 30	2015		2014
Interest paid on deposits and other borrowings	$	35,531	$	31,804
Income taxes paid		41,000		17,000
Transfers of loans to other real estate owned		6,901		7,784
Financing of other real estate owned sold		372		287

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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, international banking, business credit, 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 September 30, 2015
Interest income	$	125,281	$	—	$	22	$	10,096	$	1,798		$	137,197
Interest expense		10,473		—		—		878		645			11,996
Net interest income		114,808		—		22		9,218		1,153			125,201
Provision for credit losses		8,702		—		—		1,750		325			10,777
Non-interest income		29,667		8,682		3,602		716		(1,308	)		41,359
Non-interest expense		80,906		6,703		3,201		4,983		322			96,115
Intangible amortization		1,824		69		141		—		—			2,034
Income tax expense (benefit)		15,804		696		105		1,473		(497	)		17,581
Net income (loss)		37,239		1,214		177		1,728		(305	)		40,053
Total assets		16,658,489		21,099		22,201		187,721		(53,437	)		16,836,073
Total intangibles		855,164		10,516		13,069		1,809		—			880,558
At or for the Three Months Ended September 30, 2014
Interest income	$	120,122	$	—	$	24	$	9,773	$	1,647		$	131,566
Interest expense		9,435		—		—		826		686			10,947
Net interest income		110,687		—		24		8,947		961			120,619
Provision for credit losses		9,427		—		—		1,519		251			11,197
Non-interest income		27,179		8,174		3,373		719		(1,893	)		37,552
Non-interest expense		79,243		6,294		2,943		4,983		(71	)		93,392
Intangible amortization		2,282		72		101		—		—			2,455
Income tax expense (benefit)		14,347		656		128		1,216		(611	)		15,736
Net income (loss)		32,567		1,152		225		1,948		(501	)		35,391
Total assets		15,584,832		21,892		19,148		182,301		(51,128	)		15,757,045
Total intangibles		856,464		10,792		10,223		1,809		—			879,288

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	Community Banking		Wealth Management		Insurance			Consumer Finance		Parent and Other			Consolidated
At or for the Nine Months Ended September 30, 2015
Interest income	$	371,366	$	—	$	67		$	29,467	$	5,114		$	406,014
Interest expense		30,580		—		—			2,593		1,952			35,125
Net interest income		340,786		—		67			26,874		3,162			370,889
Provision for credit losses		21,974		—		—			5,288		515			27,777
Non-interest income		85,281		26,268		9,948			2,124		(4,328	)		119,293
Non-interest expense		236,324		20,127		10,952			14,785		967			283,155
Intangible amortization		5,601		205		342			—		—			6,148
Income tax expense (benefit)		48,744		2,143		(433	)		3,660		(1,539	)		52,575
Net income (loss)		113,424		3,793		(846	)		5,265		(1,109	)		120,527
Total assets		16,658,489		21,099		22,201			187,721		(53,437	)		16,836,073
Total intangibles		855,164		10,516		13,069			1,809		—			880,558
At or for the Nine Months Ended September 30, 2014
Interest income	$	339,974	$	—	$	74		$	28,716	$	5,122		$	373,886
Interest expense		26,413		—		—			2,481		2,356			31,250
Net interest income		313,561		—		74			26,235		2,766			342,636
Provision for credit losses		23,148		—		—			4,754		706			28,608
Non-interest income		86,512		23,530		10,582			2,120		(3,932	)		118,812
Non-interest expense		231,390		19,038		8,900			14,800		1,270			275,398
Intangible amortization		6,680		216		303			—		—			7,199
Income tax expense (benefit)		41,738		1,555		521			3,386		(1,703	)		45,497
Net income (loss)		97,117		2,721		932			5,415		(1,439	)		104,746
Total assets		15,584,832		21,892		19,148			182,301		(51,128	)		15,757,045
Total intangibles		856,454		10,792		10,223			1,809		—			879,288

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.

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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 September 30, 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.

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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 September 30, 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
September 30, 2015
Assets Measured at Fair Value
Available for sale debt securities:
U.S. Treasury	$	—	$	30,004	$	—	$	30,004
U.S. government-sponsored entities		—		390,767		—		390,767
Residential mortgage-backed securities:
Agency mortgage-backed securities		—		597,120		—		597,120
Agency collateralized mortgage obligations		—		527,928		—		527,928
Non-agency collateralized mortgage obligations		—		7		1,220		1,227
Commercial mortgage-backed securities		—		4,392		—		4,392
States of the U.S. and political subdivisions		—		11,272		—		11,272
Other debt securities		—		14,553		—		14,553
		—		1,576,043		1,220		1,577,263
Available for sale equity securities:
Financial services industry		95		656		383		1,134
Insurance services industry		129		—		—		129
		224		656		383		1,263
		224		1,576,699		1,603		1,578,526
Derivative financial instruments:
Trading		—		61,361		—		61,361
Not for trading		—		4,932		—		4,932
		—		66,293		—		66,293
	$	224	$	1,642,992	$	1,603	$	1,644,819
Liabilities Measured at Fair Value
Derivative financial instruments:
Trading		—	$	61,766		—	$	61,766
Not for trading		—		1,040		—		1,040
		—	$	62,806		—	$	62,806

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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

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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
Nine Months Ended September 30, 2015
Balance at beginning of period		—		$	475		$	1,420		$	1,895
Total gains (losses) – realized/unrealized:
Included in earnings		—			—			—			—
Included in other comprehensive income		—			(36	)		(3	)		(39	)
Accretion included in earnings		—			—			4			4
Purchases, issuances, sales and settlements:
Purchases		—			—			—			—
Issuances		—			—			—			—
Sales/redemptions		—			—			—			—
Settlements		—			—			(201	)		(201	)
Transfers from Level 3		—			(56	)		—			(56	)
Transfers into Level 3		—			—			—			—
Balance at end of period		—		$	383		$	1,220		$	1,603
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 Available for Sale footnote in this section of this Report for information relating to determining Level 3 fair values. During the second quarter of 2015, the Corporation transferred an equity security totaling $56 to non-marketable equity securities, reflected in other assets on the Consolidated Balance Sheet. There were no transfers of assets or liabilities between the hierarchy levels for 2014.

For the nine months ended September 30, 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
September 30, 2015
Impaired loans		—	$	1,016	$	1,919	$	2,935
Other real estate owned		—		5,223		2,099		7,322
December 31, 2014
Impaired loans		—		177		1,528		1,705
Other real estate owned		—		5,695		2,365		8,060

Substantially all of the fair value amounts in the table above were estimated at a date during the nine months or twelve months ended September 30, 2015 and December 31, 2014, respectively. Consequently, the fair value information presented is not as of the period’s end.

Impaired loans measured or re-measured at fair value on a non-recurring basis during the nine months ended September 30, 2015 had a carrying amount of $5,227 and an allocated allowance for credit losses of $2,508. The allocated allowance is based on fair value of $2,935 less estimated costs to sell of $216. The allowance for credit losses includes a provision applicable to the current period fair value measurements of $1,329, which was included in the provision for credit losses for the nine months ended September 30, 2015.

OREO with a carrying amount of $9,320 was written down to $6,476 (fair value of $7,322 less estimated costs to sell of $846), resulting in a loss of $2,844, which was included in earnings for the nine months ended September 30, 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.

44

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 September 30, 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:

	Carrying				Fair Value Measurements
	Amount		Fair Value		Level 1		Level 2		Level 3
September 30, 2015
Financial Assets
Cash and cash equivalents	$	258,766	$	258,766	$	258,766	$	—	$	—
Securities available for sale		1,578,526		1,578,526		224		1,576,699		1,603
Securities held to maturity		1,526,290		1,546,135		—		1,543,065		3,070
Net loans and leases, including loans held for sale		11,741,037		11,633,933		—		—		11,633,933
Derivative assets		66,293		66,293		—		66,293		—
Accrued interest receivable		44,688		44,688		44,688		—		—
Financial Liabilities
Deposits		12,759,736		12,762,839		10,206,107		2,556,732		—
Short-term borrowings		1,287,302		1,287,302		1,287,302		—		—
Long-term borrowings		542,653		541,120		—		—		541,120
Derivative liabilities		62,806		62,806		—		62,806		—
Accrued interest payable		6,283		6,283		6,283		—		—
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		—		—

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- and nine-month periods ended September 30, 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 nine months ended September 30, 2015 are not necessarily indicative of results expected for the full year ending December 31, 2015.

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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 operations 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 matters having income and expense implications, including changes in accounting policies and principles. The Corporation will continue to be impacted by extensive reforms resulting from 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.

• Changes to regulations governing bank capital and liquidity standards, including due to the Dodd-Frank Act, Volcker rule, Dodd-Frank Act stress testing rules (DFAST) 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.

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• As demonstrated by its 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; the potential dilutive effect to current shareholders, and our entry into new geographic markets in risks attendant to our unfamiliarity or inexperience in such new markets.

• Certain risks relating to originating and selling mortgages may adversely impact the Corporation’s revenue and expenses, including volatility in mortgage production and servicing revenue and changes in carrying values of our MSRs and mortgages held for sale due to changes in interest rates as well as borrower fraud and repurchase and indemnification obligations related to breaches of representations and warranties.

• Technological changes that may be more difficult or costly to implement than anticipated.

• Sporadic and inconsistent recovery from the effects of the recent economic recession and the resulting adverse impact on levels of unemployment, loan utilization rates, delinquencies, defaults and counterparty capacity to satisfy credit and other obligations.

• Increasing competition for loans pose increased challenges to originate and purchase loans with attractive terms and pricing and acceptable credit quality.

• Competition can have an impact on customer acquisition, growth and retention and on credit spreads and product pricing, which can affect market share, 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.

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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 September 30, 2015, the Corporation had 289 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 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 September 30, 2015.

RESULTS OF OPERATIONS

Three Months Ended September 30, 2015 Compared to the Three Months Ended September 30, 2014

Net income available to common stockholders for the three months ended September 30, 2015 was $38.0 million or $0.22 per diluted common share, compared to net income available to common stockholders for the three months ended September 30, 2014 of $33.4 million or $0.20 per diluted common share. The increase in net income available to common stockholders is a result of increases of $4.6 million in net interest income and $3.8 million in non-interest income, combined with a decrease of $0.4 million in the provision for credit losses, partially offset by an increase of $2.3 million in non-interest expense. The results for the third quarter of 2015 reflect the full-quarter effect of the OBA acquisition that closed on September 19, 2014. The BCSB acquisition that closed on February 15, 2014 is reflected in both quarterly periods. The results for the third quarter of 2015 and 2014 included merger and acquisition costs of $1.3 million and $1.9 million, respectively. The merger and acquisition costs in 2015 were due to the branch purchase from Bank of America that closed in September and the pending acquisition of Metro Bancorp, Inc., while the 2014 costs were a result of the OBA acquisition. Quarterly average diluted common shares outstanding increased 7.6 million shares or 4.5% to 176.5 million shares for the third quarter of 2015, primarily as a result of the OBA acquisition.

For the three months ended September 30, 2015, the Corporation’s return on average equity was 7.63% and its return on average assets was 0.95%, compared to 7.28% and 0.92%, respectively, for the three months ended September 30, 2014. The Corporation’s return on average tangible common equity was 14.12% and its return on average tangible assets was 1.03% for the third quarter of 2015, compared to 14.29% and 1.02%, respectively, for the same period of 2014. Average equity was $2.1 billion and $1.9 billion for the third quarter of 2015 and 2014, respectively, while average tangible common equity was $1.1 billion and $1.0 billion, respectively, for those same periods. Average equity for the third quarter of 2015 reflects the impact of the OBA acquisition.

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 September 30,
	2015			2014
Return on Average Tangible Common Equity:
Net income available to common stockholders (annualized)	$	150,932		$	132,437
Amortization of intangibles, net of tax (annualized)		5,246			6,332
	$	156,178		$	138,769
Average total stockholders’ equity	$	2,082,043		$	1,927,727
Less: Average preferred stockholders’ equity		(106,882	)		(106,882	)
Less: Average intangibles		(869,110	)		(849,902	)
	$	1,106,051		$	970,943
Return on average tangible common equity		14.12	%		14.29	%
Return on Average Tangible Assets:
Net income (annualized)	$	158,907		$	140,408
Amortization of intangibles, net of tax (annualized)		5,246			6,332
	$	164,153		$	146,740
Average total assets	$	16,732,310		$	15,217,695
Less: Average intangibles		(869,110	)		(849,902	)
	$	15,863,200		$	14,367,793
Return on average tangible assets		1.03	%		1.02	%

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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 September 30,
	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	$	75,208		$	30			0.16	%	$	54,223		$	23			0.17	%
Taxable investment securities (1)		2,870,378			14,577			2.03			2,636,572			13,711			2.08
Non-taxable investment securities (2)		218,609			2,624			4.80			159,797			2,086			5.22
Residential mortgage loans held for sale		8,967			74			3.30			3,330			62			7.44
Loans and leases (2) (3)		11,763,705			121,842			4.11			10,544,781			117,474			4.43
Total interest-earning assets (2)		14,936,867			139,147			3.70			13,398,703			133,356			3.96
Cash and due from banks		199,115									199,157
Allowance for credit losses		(134,206	)								(120,226	)
Premises and equipment		162,103									163,368
Other assets		1,568,431									1,576,693
Total Assets	$	16,732,310								$	15,217,695
Liabilities
Interest-bearing liabilities:
Deposits:
Interest-bearing demand	$	5,238,598			2,241			0.17		$	4,398,565			1,752			0.16
Savings		1,730,818			198			0.05			1,575,775			172			0.04
Certificates and other time		2,565,215			5,509			0.85			2,653,535			5,533			0.83
Customer repurchase agreements		236,570			113			0.19			772,812			413			0.21
Other short-term borrowings		1,309,639			1,673			0.50			723,049			1,046			0.57
Long-term borrowings		542,720			2,262			1.65			480,924			2,031			1.68
Total interest-bearing liabilities (2)		11,623,560			11,996			0.41			10,604,660			10,947			0.41
Non-interest-bearing demand		2,886,933									2,524,568
Other liabilities		139,774									160,740
Total Liabilities		14,650,267									13,289,968
Stockholders’ Equity		2,082,043									1,927,727
Total Liabilities and Stockholders’ Equity	$	16,732,310								$	15,217,695
Excess of interest-earning assets over interest-bearing liabilities	$	3,313,307								$	2,794,043
Fully tax-equivalent net interest income					127,151									122,409
Tax-equivalent adjustment					(1,950	)								(1,790	)
Net interest income				$	125,201								$	120,619
Net interest spread								3.30	%								3.55	%
Net interest margin (2)								3.39	%								3.63	%

(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 September 30, 2015, net interest income, which comprised 75.2% of net revenue (net interest income plus non-interest income) compared to 76.3% 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 $4.7 million or 3.9% from $122.4 million for the third quarter of 2014 to $127.2 million for the third quarter of 2015. Average earning assets of $14.9 billion increased $1.5 billion or 11.5% and average interest-bearing liabilities of $11.6 billion increased $1.0 billion or 9.6% from 2014 due to the OBA acquisition, combined with organic growth in loans and leases, deposits and customer repurchase agreements. The Corporation’s net interest margin was 3.39% for the third quarter of 2015, compared to 3.63% 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, combined with lower accretable yield adjustments. Accretable yield adjustments added 1 basis point to the net interest margin for the third quarter of 2015, compared to 12 basis point 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, and the derivation of tax-equivalent net interest income from amounts reported on the Corporation’s financial statements are set forth in the preceding table.

The following table sets forth certain information regarding changes in net interest income, on a FTE basis, attributable to changes in the volumes of interest-earning assets and interest-bearing liabilities and changes in the rates for the three months ended September 30, 2015, compared to the three months ended September 30, 2014 (in thousands):

	Volume			Rate			Net
Interest Income
Interest bearing deposits with banks	$	8		$	(1	)	$	7
Securities		1,750			(346	)		1,404
Residential mortgage loans held for sale		61			(49	)		12
Loans and leases		12,948			(8,580	)		4,368
		14,767			(8,976	)		5,791
Interest Expense
Deposits:
Interest bearing demand		468			21			489
Savings		26			—			26
Certificates and other time		(187	)		163			(24	)
Customer repurchase agreements		(261	)		(39	)		(300	)
Other short-term borrowings		759			(132	)		627
Long-term borrowings		258			(27	)		231
		1,063			(14	)		1,049
Net Change	$	13,704		$	(8,962	)	$	4,742

(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.

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Interest income, on an FTE basis, of $139.1 million for the third quarter of 2015, increased $5.8 million or 4.3% from the same quarter of 2014, primarily due to increased earning assets, partially offset by a lower accretable yield benefit and lower yields. During the third quarter of 2015 and 2014, the Corporation recognized a benefit of $0.3 million and $3.9 million, respectively, in accretable yield adjustments on acquired loans. The increase in earning assets was primarily driven by a $1.2 billion or 11.6% increase in average loans and leases, including $954 million or 8.8% of organic growth, which reflects the benefit of the Corporation’s expanded banking footprint and successful sales management. Average loans were adjusted for acquired balances for OBA of $300.6 million. The yield on earning assets decreased 26 basis points from the third quarter of 2014 to 3.70% for the third quarter of 2015, reflecting the decreases in market interest rates and competitive pressures, in addition to the above-mentioned changes in accretable yield adjustments on acquired loans.

Interest expense of $12.0 million for the third quarter of 2015 increased $1.0 million or 9.6% from the same quarter of 2014 due to growth in interest-bearing liabilities. The growth in average interest-bearing liabilities, which increased by $1.0 billion or 9.6%, was attributable to growth in average deposits and short-and long-term borrowings, offset by a decrease in customer repurchase agreements. The rate paid on interest-bearing liabilities was 0.41% for both the third quarter of 2015 and 2014. 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.

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 $10.8 million during the third quarter of 2015 decreased $0.4 million from the same period of 2014, primarily due to a decrease in the provision for the acquired portfolio, which resulted from lower acquired net charge-offs and a favorable cash flow re-estimation in the quarter. This was partially offset by an increased originated provision during the third quarter of 2015, which supported loan growth, and to a lesser degree, some slight credit migration within the originated commercial loan portfolio. During the third quarter of 2015, net charge-offs were $5.7 million, or 0.19% (annualized) of average loans and leases, compared to $7.3 million, or 0.28% (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 1.15% and 1.10% at September 30, 2015 and 2014, respectively, reflecting stability and consistency in the Corporation’s credit quality performance. For additional information relating to the allowance and provision for credit losses, refer to the Allowance for Credit Losses section of this Management’s Discussion and Analysis.

Non-Interest Income

Total non-interest income increased $3.8 million, to $41.4 million for the third quarter of 2015, or 10.1% 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 $18.6 million for the third quarter of 2015 increased $0.9 million or 5.0% from the same period of 2014. Customer-related interchange fees increased $0.6 million or 20.0% and other service charges and fees increased $0.7 million or 9.8% over this same period, reflecting the impact of organic growth and the expanded customer base due to acquisitions. Overdraft fees decreased $0.4 million or 5.1% over this same period, following a nationwide trend as consumers are managing their accounts to avoid fees

Trust fees of $5.2 million for the third quarter of 2015 increased $0.3 million or 7.0% from the same period of 2014, primarily driven by strong organic growth activity and geographic expansion, partially offset by a decline in market conditions. The market value of assets under management decreased $107.0 million or 2.9% to $3.6 billion during the third quarter of 2015.

Insurance commissions and fees of $4.4 million for the third quarter of 2015 increased $0.3 million or 6.1% from the same period of 2014.

Securities commissions of $3.3 million for the third quarter of 2015 increased $0.2 million or 5.5% from the third quarter of 2014, primarily due to positive results from new initiatives generating new customer relationships combined with increased volume, geographic expansion and improved market conditions.

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Net securities gains were $0.3 million for the third quarter of 2015, down from $1.2 million for the third quarter of 2014, primarily due to the sale of certain equity securities during 2014.

Mortgage banking revenue, which is primarily derived from the gain on sale of 30-year fixed rate residential mortgage loans, was $2.4 million for the third quarter of 2015 compared to $1.1 million for the same period of 2014. This increase is primarily due to higher origination volume and successful cross-selling efforts generated from a strengthened mortgage management team. During the third quarter of 2015, the Corporation sold $143.7 million of residential mortgage loans, compared to $45.0 million for the same period of 2014.

Other non-interest income of $5.2 million for the third quarter of 2015 increased $1.7 million from the third quarter of 2014. During the third quarter of 2015, the Corporation recorded $1.2 million more in fees earned through its commercial loan interest rate swap program, reflecting strong commercial loan growth. Also during the third quarter of 2015, the Corporation recorded $0.3 million more in gains from an equity investment and $0.3 million in rental income associated with a non-banking subsidiary. Additionally, the Corporation recognized $0.2 million less in recoveries of impaired loans acquired in previous acquisitions compared to the same quarter of 2014.

Non-Interest Expense

Total non-interest expense of $98.1 million for the third quarter of 2015 increased $2.3 million or 2.4% 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 $51.9 million for the third quarter of 2015 increased $2.3 million or 4.6% from the same period of 2014. This increase primarily relates to employees added in conjunction with the OBA acquisition, combined with new hires, merit increases and higher medical insurance costs in 2015.

Occupancy and equipment expense of $16.2 million for the third quarter of 2015 increased $0.8 million or 5.4% from the same period of 2014, primarily resulting from the OBA acquisition, combined with an increase in rental space and related 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 resulted in an increase of $0.6 million in technology-related expense during the third quarter of 2015.

Amortization of intangibles expense of $2.0 million for the third quarter of 2015 decreased $0.4 million or 17.2% from the third quarter of 2014, due to a combination of certain intangible assets being completely amortized during 2014 and declining amortization expense on some intangible assets due to accelerated amortization methods.

Outside services expense of $7.3 million for the third quarter of 2015 decreased $0.9 million or 10.6% from the same period of 2014. For the third quarter of 2015, compared to the same period of 2014, check card expenses decreased $0.4 million as a result of obtaining a new contract with an outside party relating to processing fees. Additionally, legal fees decreased $0.4 million during this same time period due recoveries.

The Corporation recorded $1.3 million in merger and acquisition costs associated with the branch acquisition from Bank of America and the pending Metro Bancorp, Inc. acquisition during the third quarter of 2015 and $1.9 million in merger and acquisition costs primarily associated with the OBA acquisition during the third quarter of 2014.

Other non-interest expense increased $1.1 million or 7.5% to $16.3 million in 2015. For the third quarter of 2015, OREO expenses increased $0.5 million, state taxes increased $1.2 million and supplies expenses increased $0.6 million, all primarily due to acquisitions and volume increases related to organic growth. These increases were partially offset by decreases of $1.0 million in donations due to the Pennsylvania budget impasse and $0.7 million in marketing expenses, both of which were lower due to timing differences.

Income Taxes

The Corporation’s income tax expense of $17.6 million for the third quarter of 2015 increased $1.8 million or 11.7% from the same period of 2014. The effective tax rate of 30.5% for the third quarter of 2015 decreased slightly from 30.8% for the same period of 2014, due to the benefit of a lower overall state tax burden. 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.

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Nine Months Ended September 30, 2015 Compared to the Nine Months Ended September 30, 2014

Net income available to common stockholders for the nine months ended September 30, 2015 was $114.5 million or $0.65 per diluted common share, compared to net income available to common stockholders for the nine months ended September 30, 2014 of $98.4 million or $0.59 per diluted common share. The increase in net income available to common stockholders is a result of an increase of $28.3 million in net interest income and $0.5 million in non-interest income, combined with a decrease of $0.8 million in the provision for credit losses, partially offset by an increase of $6.7 million in non-interest expense. The results for the first nine months 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 first nine months of 2015 and 2014 included $1.7 million and $8.1 million in merger costs, respectively. Average diluted common shares outstanding increased 9.3 million shares or 5.6% to 176.2 million shares for the first nine months of 2015, primarily as a result of the OBA and BCSB acquisitions.

For the nine months ended September 30, 2015, the Corporation’s return on average equity was 7.81% and its return on average assets was 0.98%, compared to 7.42% and 0.96%, respectively, for the nine months ended September 30, 2014. The Corporation’s return on average tangible common equity was 14.57% and its return on average tangible assets was 1.07% for the first nine months of 2015, compared to 14.70% and 1.06%, respectively, for the same period of 2014. Average equity was $2.1 billion and $1.9 billion for the first nine months 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 nine months 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):

	Nine Months Ended September 30,
	2015			2014
Return on Average Tangible Common Equity:
Net income available to common stockholders (annualized)	$	153,082		$	131,565
Amortization of intangibles, net of tax (annualized)		5,343			6,256
	$	158,425		$	137,821
Average total stockholders’ equity	$	2,062,930		$	1,886,386
Less: Average preferred stockholders’ equity		(106,882	)		(106,882	)
Less: Average intangibles		(868,843	)		(841,770	)
	$	1,087,205		$	937,734
Return on average tangible common equity		14.57	%		14.70	%
Return on Average Tangible Assets:
Net income (annualized)	$	161,144		$	140,045
Amortization of intangibles, net of tax (annualized)		5,343			6,256
	$	166,487		$	146,301
Average total assets	$	16,447,713		$	14,643,776
Less: Average intangibles		(868,843	)		(841,770	)
	$	15,578,870		$	13,802,007
Return on average tangible assets		1.07	%		1.06	%

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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):

	Nine Months Ended September 30,
	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	$	75,622		$	90			0.16	%	$	48,743		$	70			0.19	%
Taxable investment securities (1)		2,847,290			43,257			2.03			2,529,140			39,739			2.10
Non-taxable investment securities (2)		192,345			7,024			4.87			153,456			6,072			5.28
Residential mortgage loans held for sale		7,298			256			4.68			3,636			287			10.53
Loans and leases (2) (3)		11,528,230			360,925			4.19			10,119,645			332,921			4.40
Total interest-earning assets (2)		14,650,785			411,552			3.75			12,854,620			379,089			3.94
Cash and due from banks		195,583									194,184
Allowance for credit losses		(131,465	)								(114,576	)
Premises and equipment		166,572									162,526
Other assets		1,566,238									1,547,022
Total Assets	$	16,447,713								$	14,643,776
Liabilities
Interest-bearing liabilities:
Deposits:
Interest-bearing demand	$	4,889,508			6,082			0.17		$	4,267,539			4,932			0.15
Savings		1,697,732			563			0.04			1,548,791			526			0.05
Certificates and other time		2,584,719			16,388			0.85			2,694,813			16,609			0.82
Customer repurchase agreements		594,613			961			0.21			799,470			1,315			0.22
Other short-term borrowings		1,164,587			4,387			0.50			556,347			2,696			0.65
Long-term borrowings		542,091			6,744			1.66			367,579			5,172			1.88
Total interest-bearing liabilities (2)		11,473,250			35,125			0.41			10,234,539			31,250			0.41
Non-interest-bearing demand		2,768,012									2,375,062
Other liabilities		143,521									147,789
Total Liabilities		14,384,783									12,757,390
Stockholders’ Equity		2,062,930									1,886,386
Total Liabilities and Stockholders’ Equity	$	16,447,713								$	14,643,776
Excess of interest-earning assets over interest-bearing liabilities	$	3,177,535								$	2,620,081
Fully tax-equivalent net interest income					376,427									347,839
Tax-equivalent adjustment					(5,538	)								(5,203	)
Net interest income				$	370,889								$	342,636
Net interest spread								3.34	%								3.53	%
Net interest margin (2)								3.43	%								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

For the nine months ended September 30, 2015, net interest income, which comprised 75.7% of net revenue compared to 74.3% 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 $28.6 million or 8.2% from $347.8 million for the first nine months of 2014 to $376.4 million for the first nine months of 2015. Average earning assets of $14.7 billion increased $1.8 billion or 14.0% and average interest-bearing liabilities of $11.5 billion increased $1.2 billion or 12.1% 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 3.43% for the first nine months 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 and competitive environment, combined with a decrease in net interest margin due to lower accretable yield adjustments. Accretable yield adjustments added 3 basis points to the net interest margin for the first nine months of 2015, compared to 5 basis points for the first nine months 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, and the derivation of tax-equivalent net interest income from amounts reported on the Corporation’s financial statements are set forth in the preceding table.

The following table sets forth certain information regarding changes in net interest income, on a FTE basis, attributable to changes in the volumes of interest-earning assets and interest-bearing liabilities and changes in the rates for the nine months ended September 30, 2015, compared to the nine months ended September 30, 2014 (in thousands):

	Volume			Rate			Net
Interest Income
Interest bearing deposits with banks	$	31		$	(11	)	$	20
Securities		5,653			(1,183	)		4,470
Residential mortgage loans held for sale		185			(216	)		(31	)
Loans and leases		44,616			(16,612	)		28,004
		50,485			(18,022	)		32,463
Interest Expense
Deposits:
Interest bearing demand		1,023			127			1,150
Savings		63			(26	)		37
Certificates and other time		(689	)		468			(221	)
Customer repurchase agreements		(331	)		(23	)		(354	)
Other short-term borrowings		2,398			(707	)		1,691
Long-term borrowings		2,227			(655	)		1,572
		4,691			(816	)		3,875
Net Change	$	45,794		$	(17,206	)	$	28,588

(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 $411.6 million for the first nine months of 2015, increased $32.5 million or 8.6% from the same period of 2014, primarily due to increased earning assets, partially offset by lower accretable yield adjustments and lower yields. During the first nine months of 2015 and 2014, the Corporation recognized a benefit of $3.8 million and $4.8 million, respectively, in accretable yield adjustments on acquired loans. The increase in earning assets was primarily driven by a $1.4 billion or 13.9% increase in average loans and leases, including $1.1 billion or 10.2% 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 $12.1 million and $261.0 million, respectively. The yield on earning assets was 3.75% for the first nine months of 2015 compared to 3.94% for the same period of 2014.

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Interest expense of $35.1 million for the first nine months of 2015 increased $3.9 million or 12.4% from the same period of 2014 due to growth in interest-bearing liabilities. The growth in average interest-bearing liabilities, which increased by $1.2 billion or 12.1%, was attributable to growth in average deposits and short- and long-term borrowings, offset by a decrease in customer repurchase agreements. The rate paid on interest-bearing liabilities was 0.41% for both the first nine months of 2015 and 2014. Growth in average interest-bearing deposits increased by $660.8 million or 7.8%, including $462.8 million of organic growth and $198.0 million combined from the OBA and BCSB mergers and the recent branch acquisition. 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.

Provision for Credit Losses

The provision for credit losses of $27.8 million during the first nine months of 2015 decreased $0.8 million from the same period of 2014, due to a decrease of $3.3 million in the provision for the acquired portfolio, partially offset by an increase of $2.5 million in the provision for the originated portfolio. The decrease in the provision for the acquired portfolio resulted from lower net charge-off levels and favorable cash flow re-estimations during the period, while the increase in the provision for the originated portfolio primarily supported loan growth. During the first nine months of 2015, net charge-offs were $17.5 million, or 0.20% (annualized) of average loans and leases, compared to $18.8 million, or 0.25% (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 1.15% and 1.10% at September 30, 2015 and 2014, respectively, reflecting stability and consistency in the Corporation’s credit quality performance. For additional information relating to the allowance and provision for credit losses, refer to the Allowance for Credit Losses section of this Management’s Discussion and Analysis.

Non-Interest Income

Total non-interest income of $119.3 million for the first nine months of 2015 increased $0.5 million or 0.4% 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 $52.0 million for the first nine months of 2015 increased $1.5 million or 3.0% from the same period of 2014. Other service charges and fees increased $2.7 million or 13.5% over this same period, reflecting the impact of organic growth and the expanded customer base due to acquisitions. Overdraft fees decreased $2.0 million or 9.4% over this same period, following a nationwide trend as consumers are managing their accounts to avoid fees. Customer-related interchange fees increased $0.8 million or 9.1% over this same period due to higher volume usage of debit and credit cards.

Trust fees of $15.8 million for the first nine months of 2015 increased $1.3 million or 9.0% from the same period of 2014, primarily driven by strong organic growth activity, geographic expansion and improved market conditions. The market value of assets under management increased $76.0 million or 2.2% to $3.6 billion as of September 30, 2015.

Insurance commissions and fees of $12.4 million for the first nine months of 2015 decreased from $12.8 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 nine months of 2015 compared to the same period of 2014.

Securities commissions of $10.0 million for the first nine months of 2015 increased $1.4 million or 16.8% from the same period of 2014, primarily due to positive results from new initiatives generating new customer relationships combined with increased volume, geographic expansion and improved market conditions. Partially offsetting these increases were the costs associated with a securities system conversion combined with the impact of severe weather conditions throughout the Corporation’s market area in the first half of 2014.

Net securities gains were $0.3 million and $11.4 million for the first nine months of 2015 and 2014, respectively. During the first nine months of 2014, the Corporation strategically sold its portfolio of pooled TPS for net proceeds of $51.5 million and a net 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 2016. Partially offsetting this gain was a net loss of $3.5 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.

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Mortgage banking revenue was $6.7 million for the first nine months of 2015 compared to $2.2 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 nine months of 2015, the Corporation sold $337.6 million of residential mortgage loans, compared to $101.6 million for the same period of 2014.

Income from BOLI of $5.5 million for the first nine months of 2015 decreased $0.3 million or 5.0% from the same period of 2014, primarily as a result of fewer death claims.

Other non-interest income of $16.6 million for the first nine months of 2015 increased $3.6 million from the first nine months of 2014. During the first nine months of 2015, the Corporation recorded $2.0 million more in fees earned through its commercial loan interest rate swap program, reflecting strong commercial loan growth. Additionally, the Corporation recorded $1.6 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 nine months of 2015, the Corporation recorded $0.9 million more in gains from an equity investment, a gain of $0.4 million relating to the sale of its ownership interest in a non-banking affiliate and a gain of $0.4 million relating to the settlement of an insurance benefit. Additionally, the Corporation recognized $0.4 million less in recoveries of impaired loans acquired in previous acquisitions compared to the same period of 2014 and the Corporation recognized $0.5 million less in swap valuation income compared to the same period of 2014 due to changes in the yield curve. During the first nine months 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 $289.3 million for the first nine months of 2015 increased $6.7 million or 2.4% 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 $151.6 million for the first nine months of 2015 increased $4.6 million or 3.1% 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 nine months 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 $49.0 million for the first nine months of 2015 increased $3.0 million or 6.5% 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, resulted in an increase of $1.9 million in technology-related expense during the first nine months of 2015.

Amortization of intangibles expense of $6.1 million for the first nine months of 2015 decreased $1.1 million or 14.6% from the first nine months of 2014, due to a combination of certain intangible assets being completely amortized during 2014 and declining amortization expense on some intangible assets due to accelerated amortization methods.

Outside services expense of $25.3 million for the first nine months of 2015 increased $1.6 million or 6.8% from the same period of 2014. For the first nine months of 2015, compared to the same period of 2014, other outside services and data processing services increased $0.3 million and $0.4 million, respectively, primarily resulting from the OBA and BCSB acquisitions and costs related to compliance with new regulations. Additionally, consulting fees increased $1.2 million during this same period, as the first nine months of 2014 reflected a refund of previously paid consulting fees.

The Corporation recorded $1.7 million in merger and acquisition costs during the first nine months of 2015 associated with the acquisition of five Bank of America branches and the pending Metro Bancorp, Inc. acquisition and $8.1 million in merger and acquisition costs associated with the BCSB and OBA acquisitions during the first nine months of 2014.

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Other non-interest expense increased $4.9 million to $46.0 million for the first nine months of 2015, compared to $41.1 million for the first nine months of 2014. For the first nine months of 2015, compared to the same period of 2014, state taxes increased $2.1 million, OREO expenses increased $1.3 million, loan-related expenses increased $0.7 million, telephone expense increased $0.3 million and miscellaneous losses increased $0.5 million, all primarily due to acquisitions. Additionally, the Corporation recorded $1.2 million during the first nine months of 2015 relating to insurance processing adjustments. These increases were partially offset by decreases of $1.0 million in donations and $0.9 million in marketing expenses, both of which were lower due to timing differences.

Income Taxes

The Corporation’s income tax expense of $52.6 million for the first nine months of 2015 increased $7.1 million or 15.6% from the same period of 2014. The effective tax rate of 30.4% for the first nine months of 2015 increased slightly from 30.3% for the same period of 2014. 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 subsequently utilized to redeem various TPS obligations of the Corporation totaling $148.0 million. The positive results of these strategies can be seen in the parent’s strong cash position. The cash position was unchanged at $129.0 million at December 31, 2014 and September 30, 2015. On September 29, 2015, the Corporation issued $100.0 million aggregate principal amount of 4.875% subordinated notes due in 2025. The net proceeds of the debt offering after deducting underwriting discounts and commissions and estimated offering expenses were $98.5 million and were received on October 2, 2015. The subordinated notes will be treated as tier 2 capital for regulatory capital purposes. The Corporation intends to use the net proceeds from the sale of the subordinated notes for general corporate purposes, which may include investments at the holding company level, providing capital to support the growth of FNBPA and its business, repurchases of its common shares and the payment of the cash consideration components of future acquisitions.

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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 1.8 times at September 30, 2015 and 2.2 times at December 31, 2014. The internal guideline 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 14.3 months at September 30, 2015, assuming receipt of the sub-debt proceeds, and 14.2 months at December 31, 2014. The internal guideline for MCH is for the ratio to be greater than 12 months. The Corporation issues subordinated notes on a regular basis which decreased $2.8 million to $209.3 million or 1.3% for the nine months ended September 30, 2015.

The liquidity position of the Corporation continues to be strong as evidenced by its ability to generate growth in relationship-based accounts. Total average deposits and customer repurchase agreements grew $848.9 million, or 7.3% year over year for the nine months ended September 30, 2015 compared to the prior year. This included organic growth of $462.8 million, or 3.8% annualized. Organic results are adjusted by the impact from the acquisition of five Bank of America branches on September 18, 2015, the OBA Financial Services, Inc. acquisition on September 19, 2014, and the BCSB Bancorp, Inc. acquisition on February 15, 2014. Average organic growth in low-cost transaction deposits and customer repurchase agreements was $694.5 million, or 7.5% led by strong organic growth in average non-interest bearing demand deposits of $331.9 million, or 13.6%. The strong growth in low-cost transaction deposits and customer repurchase agreements was partially offset by a decline in average time deposits which declined $110.1 million or 4.1% over this same period. The rate of decline has slowed this year compared to prior periods due to the Corporation’s pricing actions designed to extend time deposit maturities.

FNBPA had unused wholesale credit availability of $5.4 billion or 32.4% of bank assets at September 30, 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 $782.3 million, or 4.7% of total assets and $1.1 billion, or 6.6% of total assets as of September 30, 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 September 30, 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 0.4% and (1.0)% as of September 30, 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	$	322,017		$	570,007		$	710,428		$	1,349,101		$	2,951,553
Investments		106,441			120,402			194,966			250,237			672,046
		428,458			690,409			905,394			1,599,338			3,623,599
Liabilities
Non-maturity deposits		99,443			198,886			298,328			596,657			1,193,314
Time deposits		137,022			258,695			341,406			578,597			1,315,720
Borrowings		867,466			23,224			32,673			131,647			1,055,010
		1,103,931			480,805			672,407			1,306,901			3,564,044
Period Gap (Assets - Liabilities)	$	(675,473	)	$	209,604		$	232,987		$	292,437		$	59,555
Cumulative Gap	$	(675,473	)	$	(465,869	)	$	(232,882	)	$	59,555
Cumulative Gap to Total Assets		(4.0	)%		(2.8	)%		(1.4	)%		0.4	%

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.

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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.

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 September 30, 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	$	4,146,464		$	1,249,844		$	550,537		$	1.023.459		$	6,970,304
Investments		106,441			136,746			221,120			257.877			722,184
		4,252,905			1,386,590			771,657			1.281.336			7,692,488
Liabilities
Non-maturity deposits		3,647,336			—			—			—			3,647,336
Time deposits		142,205			260,951			342,846			579.961			1,325,963
Borrowings		1,176,874			82,323			14,071			94.443			1,367,711
		4,966,415			343,274			356,917			674.404			6,341,010
Off-balance sheet		(200,000	)		50,000			—			—			(150,000	)
Period Gap (assets – liabilities + off-balance sheet)		(913,510	)	$	1,093,316		$	414,740		$	606.932		$	1,201,478
Cumulative Gap		(913,510	)	$	179,806		$	594,546		$	1.201.478
Cumulative Gap to Assets		(5.4	)%		1.1	%		3.5	%		7.1	%

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The twelve-month cumulative repricing gap to total assets was 7.1% and 6.7% as of September 30, 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 September 30, 2015.

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

	September 30, 2015			December 31, 2014			ALCO Limits
Net interest income change (12 months):
+ 300 basis points		4.4	%		3.3	%		n/a
+ 200 basis points		3.1	%		2.4	%		(5.0	)%
+ 100 basis points		1.6	%		1.1	%		(5.0	)%
- 100 basis points		(2.5	)%		(2.2	)%		(5.0	)%
Economic value of equity:
+ 300 basis points		(1.1	)%		(1.2	)%		(25.0	)%
+ 200 basis points		(0.1	)%		(0.1	)%		(15.0	)%
+ 100 basis points		0.6	%		0.6	%		(10.0	)%
- 100 basis points		(6.2	)%		(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 3.1% and 2.5% at September 30, 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 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 for both September 30, 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 3.6 and 3.3 at September 30, 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 September 30, 2015, the commercial swaps totaled $1.2 billion of notional principal, with $328.7 million in notional swap principal originated during the nine months 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.

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The Corporation desired to remain modestly asset-sensitive during the nine months of 2015. A number of management actions and market occurrences resulted in a slight increase in the asset sensitivity of the Corporation’s interest rate risk position. The primary factors included balance sheet growth in less sensitive deposits and an increase in the amount of adjustable loans repricing in 12 months or less.

The Corporation recognizes that all asset/liability models have some inherent shortcomings. Asset/liability models require certain assumptions to be made, such as estimated prepayment rates on interest-earning assets and estimated 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.

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):

	September 30, 2015		December 31, 2014
Non-interest-bearing demand	$	2,911,435	$	2,647,623
Interest-bearing demand		5,558,322		4,547,628
Savings		1,736,350		1,575,922
Certificates of deposit and other time deposits		2,553,629		2,611,035
Total deposits		12,759,736		11,382,208
Customer repurchase agreements		256,320		882,696
Total deposits and customer repurchase agreements	$	13,016,056	$	12,264,904

Total deposits and customer repurchase agreements increased by $751.2 million, or 6.1%, to $13.0 billion at September 30, 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. The decrease of $624.4 million in customer repurchase agreements was the result of a planned migration of these accounts to a new premium sweep product included in interest-bearing demand deposits launched during the second quarter of 2015. Generating growth in relationship-based transaction deposits remains a key focus of the Corporation.

NON-PERFORMING ASSETS

Non-performing loans and OREO decreased $2.5 million, from $110.0 million at December 31, 2014 to $107.5 million at September 30, 2015. This decrease reflects reductions of $2.2 million and $2.5 million in TDRs and OREO, respectively. Non-accrual loans increased $2.2 million 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 commercial portfolio.

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

	September 30, 2015		December 31, 2014
Commercial real estate	$	27,034	$	26,134
Commercial and industrial		9,898		8,852
Commercial leases		835		722
Total commercial loans and leases		37,767		35,708
Direct installment		12,780		15,901
Residential mortgages		12,481		13,842
Indirect installment		1,280		1,305
Consumer lines of credit		2,349		1,796
	$	66,657	$	68,552

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

	Performing		Non- Performing		Non- Accrual		Total
September 30, 2015
Commercial real estate	$	—	$	1,772	$	5,504	$	7,276
Commercial and industrial		—		369		1,031		1,400
Commercial leases		—		—		—		—
Total commercial loans and leases		—		2,141		6,535		8,676
Direct installment		8,130		8,062		1,025		17,217
Residential mortgages		5,560		9,510		155		15,225
Indirect installment		—		147		30		177
Consumer lines of credit		1,002		1,361		55		2,418
	$	14,692	$	21,221	$	7,800	$	43,713
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
	$	9,441	$	23,439	$	8,272	$	41,152

ALLOWANCE FOR CREDIT LOSSES

The allowance for credit losses of $136.2 million at September 30, 2015 increased $10.3 million or 8.2% from December 31, 2014, primarily in support of growth in originated loans and leases. The provision for credit losses during the nine months ended September 30, 2015 was $27.8 million, covering net charge-offs of $17.5 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 197.17% as of September 30, 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
	September 30, 2015			December 31, 2014			September 30, 2014
Non-performing loans/total originated loans and leases		0.63	%		0.71	%		0.83	%
Non-performing loans + OREO/total originated loans and leases + OREO		0.99	%		1.13	%		1.25	%
Allowance for credit losses (originated loans)/total originated loans and leases		1.22	%		1.22	%		1.24	%
Net charge-offs on originated loans and leases (annualized)/total average originated loans and leases		0.22	%		0.17	%		0.29	%

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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. On October 2, 2015, the Corporation completed its offering of $100 million aggregate principal amount of 4.875% subordinated notes due in 2025. The subordinated notes will be treated as tier 2 capital for regulatory capital purposes. The net proceeds of the debt offering after deducting underwriting discounts and commissions and estimated offering expenses were $98.5 million. The Corporation intends to use the net proceeds from the sale of the subordinated notes for general corporate purposes, which may include investments at the holding company level, providing capital to support the growth of FNBPA and its business, repurchases of its common shares and the payment of the cash consideration components of future acquisitions.

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 September 30, 2015 and December 31, 2014, the Corporation and FNBPA met all “well-capitalized” requirements to which each of them was subject.

As of September 30, 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 half 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 September 30, 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.

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Following are the capital amounts and related ratios as of September 30, 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
September 30, 2015
F.N.B. Corporation
Total capital	$	1,500,085		12.2	%	$	1,228,240		10.0	%	$	982,592		8.0	%
Tier 1 capital		1,301,998		10.6			982,592		8.0			736,944		6.0
Common equity tier 1		1,180,741		9.6			798,356		6.5			552,708		4.5
Leverage		1,301,998		8.2			794,353		5.0			635,483		4.0
FNBPA
Total capital		1,401,686		11.5			1,221,368		10.0			977,094		8.0
Tier 1 capital		1,271,143		10.4			977,094		8.0			488,547		4.0
Common equity tier 1		1,191,143		9.8			793,889		6.5			549,616		4.5
Leverage		1,271,143		8.1			786,192		5.0			628,953		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 September 30, 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.

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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 Corporation and its subsidiary bank, FNBPA.

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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 September 30, 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.

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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: an employer, a depository bank, lender, underwriter, fiduciary, financial advisor, broker, agent, acquirer 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

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ITEM 6. EXHIBITS

Exhibit Index

2.1	Agreement and Plan of Merger, dated as of August 4, 2015, by and between F.N.B. Corporation and Metro Bancorp, Inc. (Incorporated by reference to Exhibit 2.1 of the Corporation’s Current Report on Form 8-K filed on August 7, 2015).
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 September 30, 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).

71

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: November 6, 2015	/s/ Vincent J. Delie, Jr.
	Vincent J. Delie, Jr.
	President and Chief Executive Officer
	(Principal Executive Officer)
Dated: November 6, 2015	/s/ Vincent J. Calabrese, Jr.
	Vincent J. Calabrese, Jr.
	Chief Financial Officer
	(Principal Financial Officer)
Dated: November 6, 2015	/s/ Timothy G. Rubritz
	Timothy G. Rubritz
	Corporate Controller
	(Principal Accounting Officer)

72

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 September 30, 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: November 6, 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 September 30, 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: November 6, 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 September 30, 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: November 6, 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 September 30, 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: November 6, 2015	/s/ Vincent J. Calabrese, Jr.
	Vincent J. Calabrese, Jr. Chief Financial Officer

XML

Earnings Per Common Share (Tables)

9 Months Ended

Sep. 30, 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				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Net income	$	40,053	$	35,391	$	120,527	$	104,746
Less: Preferred stock dividends		2,010		2,010		6,030		6,342
Net income available to common stockholders	$	38,043	$	33,381	$	114,497	$	98,404
Basic weighted average common shares outstanding		175,343,789		167,260,386		174,816,692		165,229,206
Net effect of dilutive stock options, warrants, restricted stock and convertible debt		1,169,043		1,623,741		1,383,450		1,695,637
Diluted weighted average common shares outstanding		176,512,832		168,884,127		176,200,142		166,924,843
Earnings per common share:
Basic	$	0.22	$	0.20	$	0.65	$	0.60
Diluted	$	0.22	$	0.20	$	0.65	$	0.59

XML

Loans and Leases - Summary of Loans and Leases, Net of Unearned Income (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	$ 11,873,645	$ 11,247,038
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	3,949,246	3,815,708
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	2,491,355	2,318,015
Commercial Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	199,130	177,824
Total Commercial Loans and Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	6,639,731	6,311,547
Direct Installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	1,692,638	1,644,621
Residential Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	1,386,386	1,263,053
Indirect Installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	974,028	875,551
Consumer Lines of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	1,127,002	1,110,976
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	53,860	41,290
Originated Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	10,618,938	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	3,322,669	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	2,410,186	2,197,793
Originated Loans [Member] | Commercial Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	199,130	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	5,931,985	5,407,427
Originated Loans [Member] | Direct Installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	1,643,345	1,579,770
Originated Loans [Member] | Residential Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	1,013,254	817,586
Originated Loans [Member] | Indirect Installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	973,216	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	1,003,278	946,427
Originated Loans [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	53,860	41,290
Acquired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	1,254,707	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	626,577	783,898
Acquired Loans [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	81,169	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	707,746	904,120
Acquired Loans [Member] | Direct Installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	49,293	64,851
Acquired Loans [Member] | Residential Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	373,132	445,467
Acquired Loans [Member] | Indirect Installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	812	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	$ 123,724	$ 164,549

XML

Securities - Gross Gains and Gross Losses Realized on Sales of Securities (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Investments, Debt and Equity Securities [Abstract]
Gross gains	$ 314	$ 1,191	$ 328	$ 19,939
Gross losses		(13)	(9)	(8,524)
Total	$ 314	$ 1,178	$ 319	$ 11,415

XML

Borrowings - Summary of Long-Term Borrowings (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Debt Disclosure [Abstract]
Federal Home Loan Bank advances	$ 400,017	$ 400,042
Subordinated notes	84,351	83,155
Junior subordinated debt	58,285	58,246
Long-term debt	$ 542,653	$ 541,443

XML

Loans and Leases - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans	$ 181,298		$ 180,588
Commercial construction loans	294,249		296,156
Carrying amount	$ 11,873,645		11,247,038
Sustained period of delinquency for impairment evaluation	90 days	90 days
Minimum reserves for commercial loan	$ 500
Minimum amount to allocate specific valuation allowance	500
Allowance for loan losses	6,564		7,974
Restructured loans returned to performing status	7,577
Valuation for impairment of loans with pooled reserves	500		500
Pooled reserves for all other classes of loans	3,350		3,448
Consumer Lines of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount	1,127,002		1,110,976
Allowance for loan losses	642		267
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount	3,949,246		3,815,708
Allowance for loan losses	3,056		3,286
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount	2,491,355		2,318,015
Allowance for loan losses	579		1,484
Direct Installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount	1,692,638		1,644,621
Allowance for loan losses	1,427		1,847
Residential Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount	1,386,386		1,263,053
Allowance for loan losses	558		858
Indirect Installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount	974,028		875,551
Allowance for loan losses	302		232
Purchased Credit-Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount	8,766		9,556
Specific reserves for commercial TDRs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Reserves in allowance for loan losses, TDRs	438		371
Pooled reserves for commercial TDRs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Reserves in allowance for loan losses, TDRs	$ 1,146		$ 1,215
Loan Portfolio Diversification Risk [Member] | 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%
Loan Portfolio Diversification Risk [Member] | Loans and Leases Receivable Net of Deferred Income [Member] | Constuction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of portfolio	2.50%		2.60%
Loan Portfolio Diversification Risk [Member] | Commercial Real Estate Loans [Member] | Owner-Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of portfolio	38.90%		41.60%
Loan Portfolio Diversification Risk [Member] | Commercial Real Estate Loans [Member] | Non-Owner-Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of portfolio	61.10%		58.40%
Credit Concentration Risk [Member] | Acquired Loans Receivable [Member] | Purchased Credit-Impaired Loans [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	$ 4,285
Mortgage loans on real estate, foreclosure	$ 12,786

XML

Derivative and Hedging Activities - Derivative Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	$ 62,806	$ 46,160
Subject to Master Netting Arrangement [Member]
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	62,608	45,985
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities	31,827	30,976
Gross Amount Not Offset in the Balance Sheet Cash Collateral Pledged, Derivative Liabilities	28,290	13,243
Net Amount, Derivative Liabilities	2,491	1,766
Subject to Master Netting Arrangement [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	855	2,330
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities		2,330
Net Amount, Derivative Liabilities	855
Subject to Master Netting Arrangement [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	61,753	43,655
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities	31,827	28,646
Gross Amount Not Offset in the Balance Sheet Cash Collateral Pledged, Derivative Liabilities	28,290	13,243
Net Amount, Derivative Liabilities	$ 1,636	$ 1,766

XML

Securities - Schedule of Amortized Cost and Fair Value of Securities Available for Sale (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, Amortized Cost	$ 1,567,230	$ 1,534,771
Securities Available For Sale, Gross Unrealized Gains	17,045	11,215
Securities Available For Sale, Gross Unrealized Losses	(5,749)	(11,921)
Securities Available For Sale, Fair Value	1,578,526	1,534,065
U.S. Treasury [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, Amortized Cost	29,704	29,604
Securities Available For Sale, Gross Unrealized Gains	300	78
Securities Available For Sale, Fair Value	30,004	29,682
U.S. Government-Sponsored Entities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, Amortized Cost	388,428	338,330
Securities Available For Sale, Gross Unrealized Gains	2,644	742
Securities Available For Sale, Gross Unrealized Losses	(305)	(1,939)
Securities Available For Sale, Fair Value	390,767	337,133
Agency Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, Amortized Cost	587,244	546,572
Securities Available For Sale, Gross Unrealized Gains	9,958	7,548
Securities Available For Sale, Gross Unrealized Losses	(82)	(35)
Securities Available For Sale, Fair Value	597,120	554,085
Securities Available For Sale, Fair Value	597,120
Agency Collateralized Mortgage Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, Amortized Cost	529,656	580,601
Securities Available For Sale, Gross Unrealized Gains	3,220	1,617
Securities Available For Sale, Gross Unrealized Losses	(4,948)	(9,047)
Securities Available For Sale, Fair Value	527,928	573,171
Securities Available For Sale, Fair Value	527,928
Non-Agency Collateralized Mortgage Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, Amortized Cost	1,212	1,414
Securities Available For Sale, Gross Unrealized Gains	15	17
Securities Available For Sale, Fair Value	1,227	1,431
Securities Available For Sale, Fair Value	1,227
Commercial Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, Amortized Cost	4,384	7,891
Securities Available For Sale, Gross Unrealized Gains	8
Securities Available For Sale, Gross Unrealized Losses		(11)
Securities Available For Sale, Fair Value	4,392	7,880
Securities Available For Sale, Fair Value	4,392
States of the U.S. and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, Amortized Cost	10,927	12,713
Securities Available For Sale, Gross Unrealized Gains	345	477
Securities Available For Sale, Gross Unrealized Losses		(32)
Securities Available For Sale, Fair Value	11,272	13,158
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, Amortized Cost	14,700	16,615
Securities Available For Sale, Gross Unrealized Gains	267	420
Securities Available For Sale, Gross Unrealized Losses	(414)	(857)
Securities Available For Sale, Fair Value	14,553	16,178
Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, Amortized Cost	1,566,255	1,533,740
Securities Available For Sale, Gross Unrealized Gains	16,757	10,899
Securities Available For Sale, Gross Unrealized Losses	(5,749)	(11,921)
Securities Available For Sale, Fair Value	1,577,263	1,532,718
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, Amortized Cost	975	1,031
Securities Available For Sale, Gross Unrealized Gains	288	316
Securities Available For Sale, Gross Unrealized Losses	0	0
Securities Available For Sale, Fair Value	1,263	$ 1,347
Securities Available For Sale, Fair Value	$ 1,263

XML

Borrowings (Tables)

9 Months Ended

Sep. 30, 2015

Debt Disclosure [Abstract]

Summary of Short-Term Borrowings

Following is a summary of short-term borrowings:

	September 30, 2015		December 31, 2014
Securities sold under repurchase agreements	$	256,320	$	882,696
Federal Home Loan Bank advances		450,000		820,000
Federal funds purchased		456,000		210,000
Subordinated notes		124,982		128,962
	$	1,287,302	$	2,041,658

Summary of Long-Term Borrowings

Following is a summary of long-term borrowings:

	September 30, 2015		December 31, 2014
Federal Home Loan Bank advances	$	400,017	$	400,042
Subordinated notes		84,351		83,155
Junior subordinated debt		58,285		58,246
	$	542,653	$	541,443

Junior Subordinated Debt Trusts

The following table provides information relating to the Trusts as of September 30, 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		1.99	%	Variable; 3-month LIBOR + 165 basis points (bps)
Omega Financial Capital Trust I		36,000		1,114		36,120		10/18/34		2.48	%	Variable; 3-month LIBOR + 219 bps
	$	57,500	$	1,779	$	58,285

XML

Derivative and Hedging Activities - Effect of Corporation's Derivative Financial Instruments on Income Statement (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Interest Rate Contracts [Member] | Interest Income - Loans and Leases [Member]
Derivative [Line Items]
Derivative financial instrument, net	$ 2,440	$ 2,479
Interest Rate Contracts [Member] | Interest Expense - Short-term Borrowings [Member]
Derivative [Line Items]
Derivative financial instrument, net	115
Interest Rate Swap [Member] | Other Income [Member]
Derivative [Line Items]
Derivative financial instrument, net	(364)	$ (9)
Credit Risk Contract [Member] | Other Income [Member]
Derivative [Line Items]
Derivative financial instrument, net	$ (170)

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Derivative and Hedging Activities - Schedule of Notional Amounts and Gross Fair Values of Derivative Assets and Derivative Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Notional amount	$ 2,751,532	$ 2,215,056
Fair value, asset	66,293	45,898
Liability	62,806	46,160
Interest Rate Contracts [Member]
Derivatives, Fair Value [Line Items]
Notional amount	250,000	200,000
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Notional amount	1,193,598	972,002
Credit Risk Contract [Member]
Derivatives, Fair Value [Line Items]
Fair value, asset	14
Equity Contracts [Member]
Derivatives, Fair Value [Line Items]
Liability	12
Subject to Master Netting Arrangement [Member]
Derivatives, Fair Value [Line Items]
Notional amount	1,444,778	1,173,212
Fair value, asset	4,931	2,296
Liability	62,608	45,985
Subject to Master Netting Arrangement [Member] | Interest Rate Contracts [Member]
Derivatives, Fair Value [Line Items]
Notional amount	250,000	200,000
Fair value, asset	4,918	2,109
Liability	855	2,330
Subject to Master Netting Arrangement [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Notional amount	1,193,598	972,002
Fair value, asset	1	140
Liability	61,753	43,655
Subject to Master Netting Arrangement [Member] | Credit Risk Contract [Member]
Derivatives, Fair Value [Line Items]
Notional amount	1,180	1,210
Fair value, asset	12	47
Subject to Master Netting Arrangement [Member] | Equity Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value, asset	12	47
Not Subject to Master Netting Arrangement [Member]
Derivatives, Fair Value [Line Items]
Notional amount	1,306,754	1,041,844
Fair value, asset	61,362	43,602
Liability	198	175
Not Subject to Master Netting Arrangement [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Notional amount	1,193,598	972,002
Fair value, asset	61,348	43,602
Liability	1	128
Not Subject to Master Netting Arrangement [Member] | Credit Risk Contract [Member]
Derivatives, Fair Value [Line Items]
Notional amount	111,976	68,632
Fair value, asset	14
Liability	185
Not Subject to Master Netting Arrangement [Member] | Equity Contracts [Member]
Derivatives, Fair Value [Line Items]
Notional amount	1,180	1,210
Liability	$ 12	$ 47

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Comprehensive Income - Components of Comprehensive Income, Net of Related Tax (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Components Of Comprehensive Income [Abstract]
Securities available for sale, Unrealized gains (losses) arising during the period, net of tax expense (benefit)	$ 3,649	$ (1,551)	$ 4,302	$ 10,399
Securities available for sale, Reclassification adjustment for gains included in net income, tax expense	110	412	112	3,995
Unrealized gains on derivative instruments arising during the period, net of tax expense	1,709	40	2,353	2,979
Reclassification adjustment on derivative instruments for gains included in net income, tax expense	286	293	854	867
Unrealized gains on pension and postretirement benefit obligations arising during the period, tax expense	$ 183	$ 121	$ 560	$ 355

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Loans and Leases - Summary of Change in Accretable Yield of Acquired Loans (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 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
Acquisitions		71,111
Reduction due to unexpected early payoffs	(35,601)	(34,747)
Reclass from non-accretable difference	24,489	9,925
Disposals/transfers	(509)	(5,390)
Accretion	(46,207)	(54,664)
Balance at end of period	$ 274,071	$ 291,881

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Derivative and Hedging Activities - Offsetting of Derivative Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Gross Amount	$ 62,806	$ 46,160
Gross Amounts Offset in the Balance Sheet, Derivative Liabilities	0	0
Net Amount Presented in the Balance Sheet	62,806	46,160
Equity Contracts [Member]
Derivatives, Fair Value [Line Items]
Gross Amount	12
Gross Amounts Offset in the Balance Sheet, Derivative Liabilities	0
Net Amount Presented in the Balance Sheet	12
Subject to Master Netting Arrangement [Member]
Derivatives, Fair Value [Line Items]
Net Amount Presented in the Balance Sheet	62,608	45,985
Subject to Master Netting Arrangement [Member] | Interest Rate Contracts [Member]
Derivatives, Fair Value [Line Items]
Gross Amount	855	2,330
Gross Amounts Offset in the Balance Sheet, Derivative Liabilities	0	0
Net Amount Presented in the Balance Sheet	855	2,330
Subject to Master Netting Arrangement [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Gross Amount	61,753	43,655
Gross Amounts Offset in the Balance Sheet, Derivative Liabilities	0	0
Net Amount Presented in the Balance Sheet	61,753	43,655
Not Subject to Master Netting Arrangement [Member]
Derivatives, Fair Value [Line Items]
Net Amount Presented in the Balance Sheet	198	175
Not Subject to Master Netting Arrangement [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Gross Amount	1	128
Gross Amounts Offset in the Balance Sheet, Derivative Liabilities	0	0
Net Amount Presented in the Balance Sheet	1	128
Not Subject to Master Netting Arrangement [Member] | Equity Contracts [Member]
Derivatives, Fair Value [Line Items]
Gross Amount		47
Gross Amounts Offset in the Balance Sheet, Derivative Liabilities		0
Net Amount Presented in the Balance Sheet	12	$ 47
Not Subject to Master Netting Arrangement [Member] | Credit Risk Contract [Member]
Derivatives, Fair Value [Line Items]
Gross Amount	185
Gross Amounts Offset in the Balance Sheet, Derivative Liabilities	0
Net Amount Presented in the Balance Sheet	$ 185

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Retirement Plans - Additional Information (Detail) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2015 USD ($) RetirementPlans	Sep. 30, 2014 USD ($)	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
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 | $	$ 5,794	$ 7,595

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Commitments, Credit Risk and Contingencies - Additional Information (Detail)	Sep. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Percentage of Commitments to extend credit dependent upon the financial condition of the customers	75.30%

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Retirement Plans - Net Periodic Benefit Credit for Defined Benefit Plans (Detail) - Defined Benefit Plans [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 18	$ 15	$ 52	$ 47
Interest cost	1,470	1,610	4,424	4,802
Expected return on plan assets	(2,491)	(2,486)	(7,473)	(7,460)
Amortization:
Unrecognized net transition asset		(6)		(16)
Unrecognized prior service cost	2	2	6	6
Unrecognized loss	518	347	1,590	1,021
Net periodic pension credit	$ (483)	$ (518)	$ (1,401)	$ (1,600)

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Derivative and Hedging Activities - Derivative Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	$ 66,293	$ 45,898
Subject to Master Netting Arrangement [Member]
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	4,931	2,296
Gross Amounts Not Offset in the Balance Sheet Financial Instruments, Derivative Assets	2,570	995
Gross Amounts Not Offset in the Balance Sheet Cash Collateral Received, Derivative Assets	2,361	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	4,918	2,109
Gross Amounts Not Offset in the Balance Sheet Financial Instruments, Derivative Assets	2,557	810
Gross Amounts Not Offset in the Balance Sheet Cash Collateral Received, Derivative Assets	2,361	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	1	140
Gross Amounts Not Offset in the Balance Sheet Financial Instruments, Derivative Assets	1	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	12	47
Gross Amounts Not Offset in the Balance Sheet Financial Instruments, Derivative Assets	12	47
Net Amount, Derivative Assets	$ 0	$ 0

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Borrowings - Additional Information (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($) Trust	Dec. 31, 2014 USD ($)
Debt Instrument [Line Items]
Credit available with FHLB	$ 4,467,170
Credit with FHLB used	$ 850,017
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 | Trust	2
Percent of the common equity of each Trust owned by the Corporation	100.00%
Junior subordinated debt	$ 58,285	$ 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%
Junior subordinated debt	$ 57,500
Percentage of TPS moving from tier 1 capital to tier 2 capital for 2016	75.00%

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Earnings Per Common Share

9 Months Ended

Sep. 30, 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				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Net income	$	40,053	$	35,391	$	120,527	$	104,746
Less: Preferred stock dividends		2,010		2,010		6,030		6,342
Net income available to common stockholders	$	38,043	$	33,381	$	114,497	$	98,404
Basic weighted average common shares outstanding		175,343,789		167,260,386		174,816,692		165,229,206
Net effect of dilutive stock options, warrants, restricted stock and convertible debt		1,169,043		1,623,741		1,383,450		1,695,637
Diluted weighted average common shares outstanding		176,512,832		168,884,127		176,200,142		166,924,843
Earnings per common share:
Basic	$	0.22	$	0.20	$	0.65	$	0.60
Diluted	$	0.22	$	0.20	$	0.65	$	0.59

For the three months ended September 30, 2015 and 2014, 19,385 and 32,419 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. For the nine months ended September 30, 2015 and 2014, 20,440 and 38,151 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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Securities - Amortized Cost and Fair Value of Securities, by Contractual Maturities (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Schedule Of Securities [Line Items]
Available for Sale, Due in one year or less, Amortized Cost	$ 4,994
Available for Sale, Due from one to five years, Amortized Cost	423,858
Available for Sale, Due from five to ten years, Amortized Cost	10,013
Available for Sale, Due after ten years, Amortized Cost	4,894
Available for Sale, with contractual maturities, Amortized Cost	443,759
Total securities available for sale, Amortized Cost	1,567,230	$ 1,534,771
Available for Sale, Due in one year or less, Fair Value	5,027
Available for Sale, Due from one to five years, Fair Value	426,751
Available for Sale, Due from five to ten years, Fair Value	10,338
Available for Sale, Due after ten years, Fair Value	4,480
Available for Sale, with contractual maturities, Fair Value	446,596
Total available for sale Securities, Fair Value	1,578,526	1,534,065
Held to Maturity, Due in one year or less, Amortized Cost	1,940
Held to Maturity, Due from one to five years, Amortized Cost	139,429
Held to Maturity, Due from five to ten years, Amortized Cost	71,708
Held to Maturity, Due after ten years, Amortized Cost	161,412
Securities Held To Maturity, with contractual maturities, Amortized Cost	374,489
Held to Maturity, with contractual maturities, Amortized Cost	1,526,290	1,453,355
Held to Maturity, Due in one year or less, Fair Value	1,951
Held to Maturity, Due from one to five years, Fair Value	140,465
Held to Maturity, Due from five to ten years, Fair Value	73,681
Held to Maturity, Due after ten years, Fair Value	162,508
Securities Held To Maturity, with contractual maturities, Fair Value	378,605
Held to Maturity, with contractual maturities, Fair Value	1,546,135	1,468,258
Agency Mortgage-Backed Securities [Member]
Schedule Of Securities [Line Items]
Total securities available for sale, Amortized Cost	587,244	546,572
Total available for sale Securities, Fair Value	597,120
Held to Maturity, with contractual maturities, Amortized Cost	669,221	677,169
Held to Maturity, with contractual maturities, Fair Value	685,092	693,535
Agency Collateralized Mortgage Obligations [Member]
Schedule Of Securities [Line Items]
Total securities available for sale, Amortized Cost	529,656	580,601
Total available for sale Securities, Fair Value	527,928
Held to Maturity, with contractual maturities, Amortized Cost	462,191	501,965
Held to Maturity, with contractual maturities, Fair Value	461,566	496,494
Non-Agency Collateralized Mortgage Obligations [Member]
Schedule Of Securities [Line Items]
Total securities available for sale, Amortized Cost	1,212	1,414
Total available for sale Securities, Fair Value	1,227
Held to Maturity, with contractual maturities, Amortized Cost	3,055	4,285
Held to Maturity, with contractual maturities, Fair Value	3,070	4,313
Commercial Mortgage-Backed Securities [Member]
Schedule Of Securities [Line Items]
Total securities available for sale, Amortized Cost	4,384	7,891
Total available for sale Securities, Fair Value	4,392
Held to Maturity, with contractual maturities, Amortized Cost	17,334	17,560
Held to Maturity, with contractual maturities, Fair Value	17,802	17,739
Equity Securities [Member]
Schedule Of Securities [Line Items]
Total securities available for sale, Amortized Cost	975	$ 1,031
Total available for sale Securities, Fair Value	$ 1,263

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 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
September 30, 2015
Assets Measured at Fair Value
Available for sale debt securities:
U.S. Treasury	$	—	$	30,004	$	—	$	30,004
U.S. government-sponsored entities		—		390,767		—		390,767
Residential mortgage-backed securities:
Agency mortgage-backed securities		—		597,120		—		597,120
Agency collateralized mortgage obligations		—		527,928		—		527,928
Non-agency collateralized mortgage obligations		—		7		1,220		1,227
Commercial mortgage-backed securities		—		4,392		—		4,392
States of the U.S. and political subdivisions		—		11,272		—		11,272
Other debt securities		—		14,553		—		14,553
		—		1,576,043		1,220		1,577,263
Available for sale equity securities:
Financial services industry		95		656		383		1,134
Insurance services industry		129		—		—		129
		224		656		383		1,263
		224		1,576,699		1,603		1,578,526
Derivative financial instruments:
Trading		—		61,361		—		61,361
Not for trading		—		4,932		—		4,932
		—		66,293		—		66,293
	$	224	$	1,642,992	$	1,603	$	1,644,819
Liabilities Measured at Fair Value
Derivative financial instruments:
Trading		—	$	61,766		—	$	61,766
Not for trading		—		1,040		—		1,040
		—	$	62,806		—	$	62,806
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
Nine Months Ended September 30, 2015
Balance at beginning of period		—		$	475		$	1,420		$	1,895
Total gains (losses) – realized/unrealized:
Included in earnings		—			—			—			—
Included in other comprehensive income		—			(36	)		(3	)		(39	)
Accretion included in earnings		—			—			4			4
Purchases, issuances, sales and settlements:
Purchases		—			—			—			—
Issuances		—			—			—			—
Sales/redemptions		—			—			—			—
Settlements		—			—			(201	)		(201	)
Transfers from Level 3		—			(56	)		—			(56	)
Transfers into Level 3		—			—			—			—
Balance at end of period		—		$	383		$	1,220		$	1,603
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

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
September 30, 2015
Impaired loans		—	$	1,016	$	1,919	$	2,935
Other real estate owned		—		5,223		2,099		7,322
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:

	Carrying				Fair Value Measurements
	Amount		Fair Value		Level 1		Level 2		Level 3
September 30, 2015
Financial Assets
Cash and cash equivalents	$	258,766	$	258,766	$	258,766	$	—	$	—
Securities available for sale		1,578,526		1,578,526		224		1,576,699		1,603
Securities held to maturity		1,526,290		1,546,135		—		1,543,065		3,070
Net loans and leases, including loans held for sale		11,741,037		11,633,933		—		—		11,633,933
Derivative assets		66,293		66,293		—		66,293		—
Accrued interest receivable		44,688		44,688		44,688		—		—
Financial Liabilities
Deposits		12,759,736		12,762,839		10,206,107		2,556,732		—
Short-term borrowings		1,287,302		1,287,302		1,287,302		—		—
Long-term borrowings		542,653		541,120		—		—		541,120
Derivative liabilities		62,806		62,806		—		62,806		—
Accrued interest payable		6,283		6,283		6,283		—		—
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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Derivative and Hedging Activities - Offsetting of Derivative Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Gross Amount	$ 66,293	$ 45,898
Gross Amounts Offset in the Balance Sheet, Derivative Assets	0	0
Net Amount Presented in the Balance Sheet	66,293	45,898
Credit Risk Contract [Member]
Derivatives, Fair Value [Line Items]
Gross Amount	14
Gross Amounts Offset in the Balance Sheet, Derivative Assets	0
Net Amount Presented in the Balance Sheet	14
Subject to Master Netting Arrangement [Member]
Derivatives, Fair Value [Line Items]
Net Amount Presented in the Balance Sheet	4,931	2,296
Subject to Master Netting Arrangement [Member] | Interest Rate Contracts [Member]
Derivatives, Fair Value [Line Items]
Gross Amount	4,918	2,109
Gross Amounts Offset in the Balance Sheet, Derivative Assets	0	0
Net Amount Presented in the Balance Sheet	4,918	2,109
Subject to Master Netting Arrangement [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Gross Amount	1	140
Gross Amounts Offset in the Balance Sheet, Derivative Assets	0	0
Net Amount Presented in the Balance Sheet	1	140
Subject to Master Netting Arrangement [Member] | Equity Contracts [Member]
Derivatives, Fair Value [Line Items]
Gross Amount	12	47
Gross Amounts Offset in the Balance Sheet, Derivative Assets	0	0
Net Amount Presented in the Balance Sheet	12	47
Subject to Master Netting Arrangement [Member] | Credit Risk Contract [Member]
Derivatives, Fair Value [Line Items]
Net Amount Presented in the Balance Sheet	12	47
Not Subject to Master Netting Arrangement [Member]
Derivatives, Fair Value [Line Items]
Net Amount Presented in the Balance Sheet	61,362	43,602
Not Subject to Master Netting Arrangement [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Gross Amount	61,348	43,602
Gross Amounts Offset in the Balance Sheet, Derivative Assets	0	0
Net Amount Presented in the Balance Sheet	61,348	$ 43,602
Not Subject to Master Netting Arrangement [Member] | Credit Risk Contract [Member]
Derivatives, Fair Value [Line Items]
Net Amount Presented in the Balance Sheet	$ 14

XML

Fair Value Measurements - Balances of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 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	$ 1,578,526	$ 1,534,065
Derivative assets	66,293	45,898
Derivative liabilities	62,806	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	30,004	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	390,767	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	527,928	573,171
Assets measured at fair value, Available for sale securities	527,928
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	1,227	1,431
Assets measured at fair value, Available for sale securities	1,227
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	4,392	7,880
Assets measured at fair value, Available for sale securities	4,392
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	11,272	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	14,553	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	224	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	1,576,699	1,531,952
Derivative assets	66,293	45,898
Derivative liabilities	62,806	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	1,603	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	1,577,263	1,532,718
Assets measured at fair value, Available for sale equity securities	1,263	1,347
Assets measured at fair value, Available for sale securities	1,578,526	1,534,065
Derivative assets	66,293	45,898
Assets measured at fair value, Total	1,644,819	1,579,963
Liabilities measured at fair value, Total	62,806	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	30,004	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	390,767	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	527,928	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	1,227	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	4,392	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	11,272	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	14,553	16,178
Fair Value, Measurements, Recurring [Member] | Trading Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	61,361	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 assets	4,932	2,109
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	1,134	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	129	119
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	597,120	554,085
Fair Value, Measurements, Recurring [Member] | Trading Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities	61,766	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 liabilities	1,040	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	224	218
Assets measured at fair value, Available for sale securities	224	218
Assets measured at fair value, Total	224	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	95	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	129	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	1,576,043	1,531,298
Assets measured at fair value, Available for sale equity securities	656	654
Assets measured at fair value, Available for sale securities	1,576,699	1,531,952
Derivative assets	66,293	45,898
Assets measured at fair value, Total	1,642,992	1,577,850
Liabilities measured at fair value, Total	62,806	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	30,004	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	390,767	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	527,928	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	7	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	4,392	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	11,272	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	14,553	16,178
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 assets	61,361	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 assets	4,932	2,109
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	656	654
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	597,120	554,085
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 liabilities	61,766	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 liabilities	1,040	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	1,220	1,420
Assets measured at fair value, Available for sale equity securities	383	475
Assets measured at fair value, Available for sale securities	1,603	1,895
Assets measured at fair value, Total	1,603	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	1,220	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	$ 383	$ 475

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Retirement Plans (Tables)

9 Months Ended

Sep. 30, 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						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Service cost	$	18		$	15		$	52		$	47
Interest cost		1,470			1,610			4,424			4,802
Expected return on plan assets		(2,491	)		(2,486	)		(7,473	)		(7,460	)
Amortization:
Unrecognized net transition asset		—			(6	)		—			(16	)
Unrecognized prior service cost		2			2			6			6
Unrecognized loss		518			347			1,590			1,021
Net periodic pension credit	$	(483	)	$	(518	)	$	(1,401	)	$	(1,600	)

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Securities - Summary of Cumulative Credit-Related OTTI Charges (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 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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Allowance for Credit Losses - Summary of Changes in Allowance for Credit Losses by Loan and Lease Class (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	$ 131,141	$ 116,748	$ 125,926	$ 110,784
Charge- Offs	(7,634)	(8,567)	(22,710)	(23,368)
Recoveries	1,899	1,223	5,190	4,577
Net Charge- Offs	(5,735)	(7,344)	(17,520)	(18,791)
Provision for credit losses	10,777	11,197	27,777	28,608
Balance at End of Period	136,183	120,601	136,183	120,601
Originated Loans [Member]
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	124,196	111,188	117,952	104,884
Charge- Offs	(7,481)	(7,742)	(21,948)	(20,524)
Recoveries	1,617	1,263	4,518	3,593
Net Charge- Offs	(5,864)	(6,479)	(17,430)	(16,931)
Provision for credit losses	11,287	9,860	29,097	26,616
Balance at End of Period	129,619	114,569	129,619	114,569
Acquired Loans [Member]
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	6,945	5,560	7,974	5,900
Charge- Offs	(153)	(825)	(762)	(2,844)
Recoveries	282	(40)	672	984
Net Charge- Offs	129	(865)	(90)	(1,860)
Provision for credit losses	(510)	1,337	(1,320)	1,992
Balance at End of Period	6,564	6,032	6,564	6,032
Commercial Real Estate [Member]
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	39,872	38,478	37,588	32,548
Charge- Offs	(1,259)	(1,724)	(3,237)	(5,519)
Recoveries	370	506	779	1,068
Net Charge- Offs	(889)	(1,218)	(2,458)	(4,451)
Provision for credit losses	2,870	(80)	6,723	9,083
Balance at End of Period	41,853	37,180	41,853	37,180
Commercial and Industrial [Member]
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	32,305	33,017	32,645	32,603
Charge- Offs	(584)	(1,796)	(2,684)	(2,849)
Recoveries	290	192	1,386	730
Net Charge- Offs	(294)	(1,604)	(1,298)	(2,119)
Provision for credit losses	3,223	2,883	3,887	3,812
Balance at End of Period	35,234	34,296	35,234	34,296
Commercial Leases [Member]
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	2,223	2,079	2,398	1,903
Charge- Offs	(124)	(167)	(328)	(317)
Recoveries	50	11	95	93
Net Charge- Offs	(74)	(156)	(233)	(224)
Provision for credit losses	265	282	249	526
Balance at End of Period	2,414	2,205	2,414	2,205
Total Commercial Loans and Leases [Member]
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	74,400	73,574	72,631	67,054
Charge- Offs	(1,967)	(3,687)	(6,249)	(8,685)
Recoveries	710	709	2,260	1,891
Net Charge- Offs	(1,257)	(2,978)	(3,989)	(6,794)
Provision for credit losses	6,358	3,085	10,859	13,421
Balance at End of Period	79,501	73,681	79,501	73,681
Direct Installment [Member]
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	22,279	16,844	20,538	17,824
Charge- Offs	(2,722)	(2,369)	(8,108)	(7,154)
Recoveries	565	271	1,131	821
Net Charge- Offs	(2,157)	(2,098)	(6,977)	(6,333)
Provision for credit losses	1,214	4,814	7,775	8,069
Balance at End of Period	21,336	19,560	21,336	19,560
Residential Mortgages [Member]
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	8,579	5,506	8,024	5,836
Charge- Offs	(268)	(87)	(891)	(356)
Recoveries	14	13	53	61
Net Charge- Offs	(254)	(74)	(838)	(295)
Provision for credit losses	341	1,218	1,480	1,109
Balance at End of Period	8,666	6,650	8,666	6,650
Indirect Installment [Member]
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	8,909	6,693	7,504	6,409
Charge- Offs	(1,650)	(898)	(4,433)	(2,396)
Recoveries	264	211	898	658
Net Charge- Offs	(1,386)	(687)	(3,535)	(1,738)
Provision for credit losses	2,090	364	5,644	1,699
Balance at End of Period	9,613	6,370	9,613	6,370
Consumer Lines of Credit [Member]
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	9,118	7,664	8,496	7,231
Charge- Offs	(472)	(360)	(1,205)	(1,023)
Recoveries	56	50	132	143
Net Charge- Offs	(416)	(310)	(1,073)	(880)
Provision for credit losses	871	587	2,150	1,590
Balance at End of Period	9,573	7,941	9,573	7,941
Other [Member]
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	911	907	759	530
Charge- Offs	(402)	(341)	(1,062)	(910)
Recoveries	8	9	44	19
Net Charge- Offs	(394)	(332)	(1,018)	(891)
Provision for credit losses	413	(208)	1,189	728
Balance at End of Period	930	367	930	367
Purchased Credit-Impaired Loans [Member]
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	658	448	660	1,000
Charge- Offs		(712)	(64)	(2,614)
Recoveries		1	19	1
Net Charge- Offs		(711)	(45)	(2,613)
Provision for credit losses	36	1,026	80	2,376
Balance at End of Period	695	763	695	763
Other Acquired Loans [Member]
Schedule Of Allowance For Loan Losses [Line Items]
Balance at Beginning of Period	6,287	5,112	7,314	4,900
Charge- Offs	(153)	(113)	(698)	(230)
Recoveries	282	(41)	653	983
Net Charge- Offs	129	(154)	(45)	753
Provision for credit losses	(546)	311	(1,400)	(384)
Balance at End of Period	$ 5,869	$ 5,269	$ 5,869	$ 5,269

XML

Loans and Leases - Summary of Consumer Loans by Payment Status (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Credit Quality [Line Items]
Total Loans	$ 11,873,645	$ 11,247,038
Non-Performing [Member]
Credit Quality [Line Items]
Non-Performing Loans	68,519	68,552
Direct Installment [Member]
Credit Quality [Line Items]
Total Loans	1,692,638	1,644,621
Direct Installment [Member] | Performing [Member]
Credit Quality [Line Items]
Performing Loans	1,630,566	1,565,090
Direct Installment [Member] | Non-Performing [Member]
Credit Quality [Line Items]
Non-Performing Loans	12,779	14,680
Residential Mortgages [Member]
Credit Quality [Line Items]
Total Loans	1,386,386	1,263,053
Residential Mortgages [Member] | Performing [Member]
Credit Quality [Line Items]
Performing Loans	1,000,774	802,522
Residential Mortgages [Member] | Non-Performing [Member]
Credit Quality [Line Items]
Non-Performing Loans	12,480	15,064
Indirect Installment [Member]
Credit Quality [Line Items]
Total Loans	974,028	875,551
Indirect Installment [Member] | Performing [Member]
Credit Quality [Line Items]
Performing Loans	971,936	872,340
Indirect Installment [Member] | Non-Performing [Member]
Credit Quality [Line Items]
Non-Performing Loans	1,280	1,305
Consumer Lines of Credit [Member] | Performing [Member]
Credit Quality [Line Items]
Performing Loans	1,000,929	944,631
Consumer Lines of Credit [Member] | Non-Performing [Member]
Credit Quality [Line Items]
Non-Performing Loans	2,349	1,796
Other [Member]
Credit Quality [Line Items]
Total Loans	53,860	41,290
Other [Member] | Performing [Member]
Credit Quality [Line Items]
Performing Loans	53,860	41,290
Originated Loans [Member]
Credit Quality [Line Items]
Total Loans	10,618,938	9,666,145
Originated Loans [Member] | Direct Installment [Member]
Credit Quality [Line Items]
Total Loans	1,643,345	1,579,770
Originated Loans [Member] | Residential Mortgages [Member]
Credit Quality [Line Items]
Total Loans	1,013,254	817,586
Originated Loans [Member] | Indirect Installment [Member]
Credit Quality [Line Items]
Total Loans	973,216	873,645
Originated Loans [Member] | Consumer Lines of Credit [Member]
Credit Quality [Line Items]
Total Loans	1,003,278	946,427
Originated Loans [Member] | Other [Member]
Credit Quality [Line Items]
Total Loans	$ 53,860	$ 41,290

XML

Securities - Schedule of Amortized Cost and Fair Value of Securities Held to Maturity (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Investment Securities Held To Maturity [Line Items]
Securities Held To Maturity, Amortized Cost	$ 1,526,290	$ 1,453,355
Securities Held To Maturity, Gross Unrealized Gains	24,947	23,145
Securities Held To Maturity, Gross Unrealized Losses	(5,102)	(8,242)
Securities held to maturity, fair value	1,546,135	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	169	168
Securities held to maturity, fair value	669	670
U.S. Government-Sponsored Entities [Member]
Investment Securities Held To Maturity [Line Items]
Securities Held To Maturity, Amortized Cost	146,528	101,602
Securities Held To Maturity, Gross Unrealized Gains	1,964	885
Securities Held To Maturity, Gross Unrealized Losses	(79)	(524)
Securities held to maturity, fair value	148,413	101,963
Agency Mortgage-Backed Securities [Member]
Investment Securities Held To Maturity [Line Items]
Securities Held To Maturity, Amortized Cost	669,221	677,169
Securities Held To Maturity, Gross Unrealized Gains	15,887	16,712
Securities Held To Maturity, Gross Unrealized Losses	(16)	(346)
Securities held to maturity, fair value	685,092	693,535
Agency Collateralized Mortgage Obligations [Member]
Investment Securities Held To Maturity [Line Items]
Securities Held To Maturity, Amortized Cost	462,191	501,965
Securities Held To Maturity, Gross Unrealized Gains	3,556	1,858
Securities Held To Maturity, Gross Unrealized Losses	(4,181)	(7,329)
Securities held to maturity, fair value	461,566	496,494
Non-Agency Collateralized Mortgage Obligations [Member]
Investment Securities Held To Maturity [Line Items]
Securities Held To Maturity, Amortized Cost	3,055	4,285
Securities Held To Maturity, Gross Unrealized Gains	15	28
Securities held to maturity, fair value	3,070	4,313
Commercial Mortgage-Backed Securities [Member]
Investment Securities Held To Maturity [Line Items]
Securities Held To Maturity, Amortized Cost	17,334	17,560
Securities Held To Maturity, Gross Unrealized Gains	468	179
Securities held to maturity, fair value	17,802	17,739
States of the U.S. and Political Subdivisions [Member]
Investment Securities Held To Maturity [Line Items]
Securities Held To Maturity, Amortized Cost	227,461	150,272
Securities Held To Maturity, Gross Unrealized Gains	2,888	3,315
Securities Held To Maturity, Gross Unrealized Losses	(826)	(43)
Securities held to maturity, fair value	$ 229,523	$ 153,544

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Basis of Presentation

9 Months Ended

Sep. 30, 2015

Organization, Consolidation and Presentation of Financial Statements [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 Impaired Loans, by Class (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	$ 79,874	$ 81,765
Recorded Investment With No Specific Reserve	59,528	66,619
Recorded Investment With Specific Reserve	7,164	2,831
Total Recorded Investment	66,692	69,450
Specific Reserve	2,509	1,179
Average Recorded Investment	67,844	75,367
Commercial Real Estate [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	35,733	34,583
Recorded Investment With No Specific Reserve	25,035	25,443
Recorded Investment With Specific Reserve	2,057	883
Total Recorded Investment	27,092	26,326
Specific Reserve	919	399
Average Recorded Investment	26,928	30,807
Commercial and Industrial [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	10,981	11,412
Recorded Investment With No Specific Reserve	4,770	7,609
Recorded Investment With Specific Reserve	5,107	1,948
Total Recorded Investment	9,877	9,557
Specific Reserve	1,590	780
Average Recorded Investment	9,565	9,510
Commercial Leases [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	835	722
Recorded Investment With No Specific Reserve	835	722
Total Recorded Investment	835	722
Average Recorded Investment	767	686
Total Commercial Loans and Leases [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	47,549	46,717
Recorded Investment With No Specific Reserve	30,640	33,774
Recorded Investment With Specific Reserve	7,164	2,831
Total Recorded Investment	37,804	36,605
Specific Reserve	2,509	1,179
Average Recorded Investment	37,260	41,003
Direct Installment [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	13,569	14,987
Recorded Investment With No Specific Reserve	12,779	14,680
Total Recorded Investment	12,779	14,680
Average Recorded Investment	13,538	14,248
Residential Mortgages [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	12,971	16,791
Recorded Investment With No Specific Reserve	12,480	15,064
Total Recorded Investment	12,480	15,064
Average Recorded Investment	13,744	16,924
Indirect Installment [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	3,220	1,467
Recorded Investment With No Specific Reserve	1,280	1,305
Total Recorded Investment	1,280	1,305
Average Recorded Investment	1,168	1,399
Consumer Lines of Credit [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	2,565	1,803
Recorded Investment With No Specific Reserve	2,349	1,796
Total Recorded Investment	2,349	1,796
Average Recorded Investment	$ 2,134	$ 1,793

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Business - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2015 State Office Location
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of states, Company operating financial services | State	6
Number of metropolitan areas, Company operating financial services | Location	3
Number of consumer finance offices	73
Number of banking offices	289

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New Accounting Standards (Policies)

9 Months Ended

Sep. 30, 2015

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

Business Combinations - Simplifying the Accounting for Measurement-Period Adjustments

Business Combinations – Simplifying the Accounting for Measurement-Period Adjustments

In September 2015, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2015-16, Business Combinations – Simplifying the Accounting for Measurement-Period Adjustments. ASU 2015-16 eliminates the requirement that an acquirer in a business combination account for measurement-period adjustments retrospectively. Instead, an acquirer must recognize measurement-period adjustments in the period in which it determines the amount of the adjustment, including the effect on earnings of any amounts that would have been recorded in previous periods if the accounting had been completed at the acquisition date. The guidance is effective for fiscal periods beginning after December 15, 2015, and interim periods within those fiscal years. Early adoption is permitted. The adoption of this update will not have a material effect on the financial statements, results of operations or liquidity of the Corporation.

Insurance - Disclosures about Short-Duration Contracts

Insurance – Disclosures about Short-Duration Contracts

In May 2015, the FASB issued ASU 2015-09, Financial Services – Insurance. ASU 2015-09 requires insurance entities that issue short-duration contracts to provide additional disclosures about the liability for unpaid claims and claim adjustment expenses, including disclosure of information about significant changes in methodologies and assumptions used to calculate the liability, reasons for the change, and the effects on the financial statements. These additional disclosures will increase the transparency of significant estimates made in measuring those liabilities, improve comparability by requiring consistent disclosure of information, and provide financial statement users with information to facilitate analysis. ASU 2015-09 should be applied retrospectively and is effective for annual periods beginning after December 15, 2015, and interim periods beginning after December 15, 2016, with early adoption permitted. 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.

Cloud Computing Arrangements

Cloud Computing Arrangements

In April 2015, the FASB issued ASU 2015-05, Intangibles-Goodwill and Other-Internal-Use Software. ASU 2015-05 provides guidance about whether a cloud computing arrangement includes a license for internal use software, and how to account for the software license element of the arrangement. This update eliminates the existing requirement to analogize the guidance on leases in ASC 840 in accounting for some software licenses. ASU 2015-05 is 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 or the impact that the adoption of this update will have on its financial statements.

Interest - Imputation of Interest

Interest – Imputation of Interest

In April 2015, the FASB issued ASU 2015-03, Interest – Imputation of Interest. ASU 2015-03 requires debt issuance costs to be presented in the balance sheet as a direct deduction from the corresponding debt liability. The recognition and measurement guidance for debt issuance costs is not affected by the amendments in this update. ASU 2015-03 is effective for reporting periods beginning after December 15, 2015, with early adoption permitted. A reporting entity should apply the new guidance on a retrospective basis, wherein the balance sheet of each individual period presented should be adjusted to reflect the period-specific effects of applying the new guidance. 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.

Consolidation

Consolidation

In February 2015, the FASB issued ASU 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 ASU is 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 2015-01, Income Statement – Extraordinary and Unusual Items. ASU 2015-01 simplified income statement presentation by eliminating from GAAP the concept of extraordinary items. The ASU is 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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Fair Value Measurements

9 Months Ended

Sep. 30, 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 September 30, 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 September 30, 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
September 30, 2015
Assets Measured at Fair Value
Available for sale debt securities:
U.S. Treasury	$	—	$	30,004	$	—	$	30,004
U.S. government-sponsored entities		—		390,767		—		390,767
Residential mortgage-backed securities:
Agency mortgage-backed securities		—		597,120		—		597,120
Agency collateralized mortgage obligations		—		527,928		—		527,928
Non-agency collateralized mortgage obligations		—		7		1,220		1,227
Commercial mortgage-backed securities		—		4,392		—		4,392
States of the U.S. and political subdivisions		—		11,272		—		11,272
Other debt securities		—		14,553		—		14,553
		—		1,576,043		1,220		1,577,263
Available for sale equity securities:
Financial services industry		95		656		383		1,134
Insurance services industry		129		—		—		129
		224		656		383		1,263
		224		1,576,699		1,603		1,578,526
Derivative financial instruments:
Trading		—		61,361		—		61,361
Not for trading		—		4,932		—		4,932
		—		66,293		—		66,293
	$	224	$	1,642,992	$	1,603	$	1,644,819
Liabilities Measured at Fair Value
Derivative financial instruments:
Trading		—	$	61,766		—	$	61,766
Not for trading		—		1,040		—		1,040
		—	$	62,806		—	$	62,806
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

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
Nine Months Ended September 30, 2015
Balance at beginning of period		—		$	475		$	1,420		$	1,895
Total gains (losses) – realized/unrealized:
Included in earnings		—			—			—			—
Included in other comprehensive income		—			(36	)		(3	)		(39	)
Accretion included in earnings		—			—			4			4
Purchases, issuances, sales and settlements:
Purchases		—			—			—			—
Issuances		—			—			—			—
Sales/redemptions		—			—			—			—
Settlements		—			—			(201	)		(201	)
Transfers from Level 3		—			(56	)		—			(56	)
Transfers into Level 3		—			—			—			—
Balance at end of period		—		$	383		$	1,220		$	1,603
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 Available for Sale footnote in this section of this Report for information relating to determining Level 3 fair values. During the second quarter of 2015, the Corporation transferred an equity security totaling $56 to non-marketable equity securities, reflected in other assets on the Consolidated Balance Sheet. There were no transfers of assets or liabilities between the hierarchy levels for 2014.

For the nine months ended September 30, 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
September 30, 2015
Impaired loans		—	$	1,016	$	1,919	$	2,935
Other real estate owned		—		5,223		2,099		7,322
December 31, 2014
Impaired loans		—		177		1,528		1,705
Other real estate owned		—		5,695		2,365		8,060

Substantially all of the fair value amounts in the table above were estimated at a date during the nine months or twelve months ended September 30, 2015 and December 31, 2014, respectively. Consequently, the fair value information presented is not as of the period’s end.

Impaired loans measured or re-measured at fair value on a non-recurring basis during the nine months ended September 30, 2015 had a carrying amount of $5,227 and an allocated allowance for credit losses of $2,508. The allocated allowance is based on fair value of $2,935 less estimated costs to sell of $216. The allowance for credit losses includes a provision applicable to the current period fair value measurements of $1,329, which was included in the provision for credit losses for the nine months ended September 30, 2015.

OREO with a carrying amount of $9,320 was written down to $6,476 (fair value of $7,322 less estimated costs to sell of $846), resulting in a loss of $2,844, which was included in earnings for the nine months ended September 30, 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 September 30, 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:

	Carrying				Fair Value Measurements
	Amount		Fair Value		Level 1		Level 2		Level 3
September 30, 2015
Financial Assets
Cash and cash equivalents	$	258,766	$	258,766	$	258,766	$	—	$	—
Securities available for sale		1,578,526		1,578,526		224		1,576,699		1,603
Securities held to maturity		1,526,290		1,546,135		—		1,543,065		3,070
Net loans and leases, including loans held for sale		11,741,037		11,633,933		—		—		11,633,933
Derivative assets		66,293		66,293		—		66,293		—
Accrued interest receivable		44,688		44,688		44,688		—		—
Financial Liabilities
Deposits		12,759,736		12,762,839		10,206,107		2,556,732		—
Short-term borrowings		1,287,302		1,287,302		1,287,302		—		—
Long-term borrowings		542,653		541,120		—		—		541,120
Derivative liabilities		62,806		62,806		—		62,806		—
Accrued interest payable		6,283		6,283		6,283		—		—
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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Fair Value Measurements - Fair Values of Corporation's Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 258,766	$ 287,393	$ 237,968	$ 213,981
Securities available for sale	1,578,526	1,534,065
Securities held to maturity	1,526,290	1,453,355
Securities held to maturity	1,546,135	1,468,258
Derivative assets	66,293	45,898
Deposits	12,759,736	11,382,208
Short-term borrowings	1,287,302	2,041,658
Long-term borrowings	542,653	541,443
Derivative liabilities	62,806	46,160
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	258,766	287,393
Securities available for sale	1,578,526	1,534,065
Securities held to maturity	1,546,135	1,468,258
Net loans and leases, including loans held for sale	11,633,933	10,956,544
Derivative assets	66,293	45,898
Accrued interest receivable	44,688	40,231
Deposits	12,762,839	11,382,402
Short-term borrowings	1,287,302	2,041,672
Long-term borrowings	541,120	539,007
Derivative liabilities	62,806	46,160
Accrued interest payable	6,283	6,689
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	258,766	287,393
Securities available for sale	1,578,526	1,534,065
Securities held to maturity	1,526,290	1,453,355
Net loans and leases, including loans held for sale	11,741,037	11,127,292
Derivative assets	66,293	45,898
Accrued interest receivable	44,688	40,231
Deposits	12,759,736	11,382,208
Short-term borrowings	1,287,302	2,041,658
Long-term borrowings	542,653	541,443
Derivative liabilities	62,806	46,160
Accrued interest payable	6,283	6,689
Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	258,766	287,393
Securities available for sale	224	218
Accrued interest receivable	44,688	40,231
Deposits	10,206,107	8,771,173
Short-term borrowings	1,287,302	2,041,672
Accrued interest payable	6,283	6,689
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	1,576,699	1,531,952
Securities held to maturity	1,543,065	1,463,945
Derivative assets	66,293	45,898
Deposits	2,556,732	2,611,229
Derivative liabilities	62,806	46,160
Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	1,603	1,895
Securities held to maturity	3,070	4,313
Net loans and leases, including loans held for sale	11,633,933	10,956,544
Long-term borrowings	$ 541,120	$ 539,007

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Loans and Leases - Summary of Outstanding Principal Balance and Carrying Amount of Acquired Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount	$ 11,873,645	$ 11,247,038
Accounted for under ASC 310-30 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	1,345,685	1,597,558
Carrying amount	1,094,604	1,344,171
Accounted for under ASC 310-20 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	159,695	242,488
Carrying amount	153,539	228,748
Acquired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	1,505,380	1,840,046
Carrying amount	$ 1,248,143	$ 1,572,919

XML

Debt Offering - Additional Information (Detail) - 4.875% Subordinated Notes Due in 2025 [Member] - Scenario, Forecast [Member] $ in Thousands	Oct. 02, 2015 USD ($)
Debt Instrument [Line Items]
Aggregate principal amount	$ 100,000
Debt instrument interest rate percentage	4.875%
Proceeds from issuance of notes	$ 98,500

XML

Securities (Tables)

9 Months Ended

Sep. 30, 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
September 30, 2015
U.S. Treasury	$	29,704	$	300	$	—		$	30,004
U.S. government-sponsored entities		388,428		2,644		(305	)		390,767
Residential mortgage-backed securities:
Agency mortgage-backed securities		587,244		9,958		(82	)		597,120
Agency collateralized mortgage obligations		529,656		3,220		(4,948	)		527,928
Non-agency collateralized mortgage obligations		1,212		15		—			1,227
Commercial mortgage-backed securities		4,384		8		—			4,392
States of the U.S. and political subdivisions		10,927		345		—			11,272
Other debt securities		14,700		267		(414	)		14,553
Total debt securities		1,566,255		16,757		(5,749	)		1,577,263
Equity securities		975		288		—			1,263
	$	1,567,230	$	17,045	$	(5,749	)	$	1,578,526
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 Held to Maturity
September 30, 2015
U.S. Treasury	$	500	$	169	$	—		$	669
U.S. government-sponsored entities		146,528		1,964		(79	)		148,413
Residential mortgage-backed securities:
Agency mortgage-backed securities		669,221		15,887		(16	)		685,092
Agency collateralized mortgage obligations		462,191		3,556		(4,181	)		461,566
Non-agency collateralized mortgage obligations		3,055		15		—			3,070
Commercial mortgage-backed securities		17,334		468		—			17,802
States of the U.S. and political subdivisions		227,461		2,888		(826	)		229,523
	$	1,526,290	$	24,947	$	(5,102	)	$	1,546,135
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					Nine Months Ended
	September 30,					September 30,
	2015		2014			2015			2014
Gross gains	$	314	$	1,191		$	328		$	19,939
Gross losses		—		(13	)		(9	)		(8,524	)
	$	314	$	1,178		$	319		$	11,415

Amortized Cost and Fair Value of Securities, by Contractual Maturities

As of September 30, 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	$	4,994	$	5,027	$	1,940	$	1,951
Due from one to five years		423,858		426,751		139,429		140,465
Due from five to ten years		10,013		10,338		71,708		73,681
Due after ten years		4,894		4,480		161,412		162,508
		443,759		446,596		374,489		378,605
Residential mortgage-backed securities:
Agency mortgage-backed securities		587,244		597,120		669,221		685,092
Agency collateralized mortgage obligations		529,656		527,928		462,191		461,566
Non-agency collateralized mortgage obligations		1,212		1,227		3,055		3,070
Commercial mortgage-backed securities		4,384		4,392		17,334		17,802
Equity securities		975		1,263		—		—
	$	1,567,230	$	1,578,526	$	1,526,290	$	1,546,135

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
September 30, 2015
U.S. government-sponsored entities		3	$	59,823	$	(177	)		3	$	37,867	$	(128	)		6	$	97,690	$	(305	)
Residential mortgage-backed securities:
Agency mortgage-backed securities		1		18,591		(82	)		—		—		—			1		18,591		(82	)
Agency collateralized mortgage obligations		4		63,640		(123	)		18		228,010		(4,825	)		22		291,650		(4,948	)
Other debt securities		—		—		—			3		4,480		(414	)		3		4,480		(414	)
		8	$	142,054	$	(382	)		24	$	270,357	$	(5,367	)		32	$	412,411	$	(5,749	)
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
September 30, 2015
U.S. government-sponsored entities		—	$	—	$	—			1	$	14,921	$	(79	)		1	$	14,921	$	(79	)
Residential mortgage-backed securities:
Agency mortgage-backed securities		—		—		—			1		924		(16	)		1		924		(16	)
Agency collateralized mortgage obligations		3		46,120		(212	)		14		170,359		(3,969	)		17		216,479		(4,181	)
States of the U.S. and political subdivisions		24		46,933		(826	)		—		—		—			24		46,933		(826	)
		27	$	93,053	$	(1,038	)		16	$	186,204	$	(4,064	)		43	$	279,257	$	(5,102	)
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 Nine Months Ended September 30, 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 Nine Months Ended September 30, 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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Loans and Leases (Tables)

9 Months Ended

Sep. 30, 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
September 30, 2015
Commercial real estate	$	3,322,669	$	626,577	$	3,949,246
Commercial and industrial		2,410,186		81,169		2,491,355
Commercial leases		199,130		—		199,130
Total commercial loans and leases		5,931,985		707,746		6,639,731
Direct installment		1,643,345		49,293		1,692,638
Residential mortgages		1,013,254		373,132		1,386,386
Indirect installment		973,216		812		974,028
Consumer lines of credit		1,003,278		123,724		1,127,002
Other		53,860		—		53,860
	$	10,618,938	$	1,254,707	$	11,873,645
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:

	September 30, 2015		December 31, 2014
Accounted for under ASC 310-30:
Outstanding balance	$	1,345,685	$	1,597,558
Carrying amount		1,094,604		1,344,171
Accounted for under ASC 310-20:
Outstanding balance		159,695		242,488
Carrying amount		153,539		228,748
Total acquired loans:
Outstanding balance		1,505,380		1,840,046
Carrying amount		1,248,143		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.

	Nine Months Ended
	September 30,
	2015			2014
Balance at beginning of period	$	331,899		$	305,646
Acquisitions		—			71,111
Reduction due to unexpected early payoffs		(35,601	)		(34,747	)
Reclass from non-accretable difference		24,489			9,925
Disposals/transfers		(509	)		(5,390	)
Accretion		(46,207	)		(54,664	)
Balance at end of period	$	274,071		$	291,881

Summary of Non-Performing Assets

Following is a summary of non-performing assets:

	September 30, 2015			December 31, 2014
Non-accrual loans	$	47,298		$	45,113
Troubled debt restructurings		21,221			23,439
Total non-performing loans		68,519			68,552
Other real estate owned (OREO)		38,931			41,466
Total non-performing assets	$	107,450		$	110,018
Asset quality ratios:
Non-performing loans as a percent of total loans and leases		0.58	%		0.61	%
Non-performing loans + OREO as a percent of total loans and leases + OREO		0.90	%		0.97	%
Non-performing assets as a percent of total assets		0.64	%		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
September 30, 2015
Commercial real estate	$	6,040	$	3	$	25,262	$	31,305	$	3,291,364	$	3,322,669
Commercial and industrial		3,854		3		9,529		13,386		2,396,800		2,410,186
Commercial leases		709		14		835		1,558		197,572		199,130
Total commercial loans and leases		10,603		20		35,626		46,249		5,885,736		5,931,985
Direct installment		9,874		3,326		4,718		17,918		1,625,427		1,643,345
Residential mortgages		11,121		1,334		2,971		15,426		997,828		1,013,254
Indirect installment		8,213		522		1,133		9,868		963,348		973,216
Consumer lines of credit		3,385		629		988		5,002		998,276		1,003,278
Other		134		169		—		303		53,557		53,860
	$	43,330	$	6,000	$	45,436	$	94,766	$	10,524,172	$	10,618,938
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		Non-Accrual		Total Past Due (1) (2)		Current		Discount			Total Loans
Acquired Loans
September 30, 2015
Commercial real estate	$	10,510	$	11,108	$	1,303	$	22,921	$	641,768	$	(38,112	)	$	626,577
Commercial and industrial		686		527		107		1,320		87,163		(7,314	)		81,169
Total commercial loans		11,196		11,635		1,410		24,241		728,931		(45,426	)		707,746
Direct installment		670		834		—		1,504		46,981		808			49,293
Residential mortgages		8,607		15,261		—		23,868		386,425		(37,161	)		373,132
Indirect installment		26		11		—		37		801		(26	)		812
Consumer lines of credit		1,105		810		452		2,367		125,150		(3,793	)		123,724
	$	21,604	$	28,551	$	1,862	$	52,017	$	1,288,288	$	(85,598	)	$	1,254,707
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 September 30, 2015 and December 31, 2014.

(2) Acquired loans are considered performing upon acquisition, regardless of whether the customer is contractually delinquent, as long as the Corporation can reasonably estimate the timing and amount of expected cash flows on such loans. In these instances, 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. Acquired loans are considered non-accrual or non-performing when, due to credit deterioration or other factors, the Corporation determines it is no longer able to reasonably estimate the timing and amount of expected cash flows on such loans. The Corporation does not recognize interest income on acquired loans considered non-accrual or non-performing.

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
September 30, 2015
Commercial real estate	$	3,195,455	$	60,727	$	65,568	$	919	$	3,322,669
Commercial and industrial		2,259,932		103,650		45,014		1,590		2,410,186
Commercial leases		194,783		3,149		1,198		—		199,130
	$	5,650,170	$	167,526	$	111,780	$	2,509	$	5,931,985
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
September 30, 2015
Commercial real estate	$	488,840	$	49,669	$	88,068		—	$	626,577
Commercial and industrial		69,036		1,969		10,164		—		81,169
	$	557,876	$	51,638	$	98,232		—	$	707,746
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
September 30, 2015
Direct installment	$	1,630,566	$	12,779	$	1,643,345
Residential mortgages		1,000,774		12,480		1,013,254
Indirect installment		971,936		1,280		973,216
Consumer lines of credit		1,000,929		2,349		1,003,278
Other		53,860		—		53,860
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 Nine Months Ended September 30, 2015
Commercial real estate	$	35,733	$	25,035	$	2,057	$	27,092	$	919	$	26,928
Commercial and industrial		10,981		4,770		5,107		9,877		1,590		9,565
Commercial leases		835		835		—		835		—		767
Total commercial loans and leases		47,549		30,640		7,164		37,804		2,509		37,260
Direct installment		13,569		12,779		—		12,779		—		13,538
Residential mortgages		12,971		12,480		—		12,480		—		13,744
Indirect installment		3,220		1,280		—		1,280		—		1,168
Consumer lines of credit		2,565		2,349		—		2,349		—		2,134
	$	79,874	$	59,528	$	7,164	$	66,692	$	2,509	$	67,844
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
	$	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 originated TDRs:

	September 30, 2015		December 31, 2014
Accruing:
Performing	$	14,692	$	9,441
Non-performing		21,221		23,439
Non-accrual		7,800		8,272
	$	43,713	$	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 originated loans, by class, that have been restructured:

	Three Months Ended September 30, 2015						Nine Months Ended September 30, 2015
	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	$	168
Commercial and industrial		—		—		—		1		5		4
Total commercial loans		—		—		—		3		317		172
Direct installment		121		1,757		1,726		361		5,064		4,835
Residential mortgages		10		232		233		31		1,048		1,074
Indirect installment		3		13		10		13		43		40
Consumer lines of credit		10		146		143		40		666		610
		144	$	2,148	$	2,112		448	$	7,138	$	6,731
	Three Months Ended September 30, 2014						Nine Months Ended September 30, 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		1	$	50	$	48		10	$	2,633	$	2,187
Commercial and industrial		2		126		119		3		323		307
Total commercial loans		3		176		167		13		2,956		2,494
Direct installment		116		1,323		1,240		378		4,922		4,693
Residential mortgages		9		480		470		33		1,847		1,784
Indirect installment		7		18		15		20		52		48
Consumer lines of credit		6		88		56		31		899		857
		141	$	2,085	$	1,948		475	$	10,676	$	9,876

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

Following is a summary of originated 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 September 30, 2015 (1)				Nine Months Ended September 30, 2015 (1)
	Number of Contracts		Recorded Investment		Number of Contracts		Recorded Investment
Commercial real estate		—	$	—		—	$	—
Commercial and industrial		—		—		1		204
Total commercial loans		—		—		1		204
Direct installment		22		87		75		254
Residential mortgages		2		75		5		179
Indirect installment		1		6		6		12
Consumer lines of credit		—		—		1		8
		25	$	168		88	$	657

	Three Months Ended September 30, 2014 (1)				Nine Months Ended September 30, 2014 (1)
	Number of Contracts		Recorded Investment		Number of Contracts		Recorded Investment
Direct installment		41	$	356		80	$	732
Residential mortgages		2		33		2		33
Indirect installment		3		10		4		11
Consumer lines of credit		1		50		1		50
		47	$	449		87	$	826

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

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Business

9 Months Ended

Sep. 30, 2015

Organization, Consolidation and Presentation of Financial Statements [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, Pennsylvania, Baltimore, Maryland and Cleveland, Ohio. As of September 30, 2015, the Corporation had 289 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 September 30, 2015.

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Allowance for Credit Losses (Tables)

9 Months Ended

Sep. 30, 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 September 30, 2015
Commercial real estate	$	39,872	$	(1,259	)	$	370		$	(889	)	$	2,870		$	41,853
Commercial and industrial		32,305		(584	)		290			(294	)		3,223			35,234
Commercial leases		2,223		(124	)		50			(74	)		265			2,414
Total commercial loans and leases		74,400		(1,967	)		710			(1,257	)		6,358			79,501
Direct installment		22,279		(2,722	)		565			(2,157	)		1,214			21,336
Residential mortgages		8,579		(268	)		14			(254	)		341			8,666
Indirect installment		8,909		(1,650	)		264			(1,386	)		2,090			9,613
Consumer lines of credit		9,118		(472	)		56			(416	)		871			9,573
Other		911		(402	)		8			(394	)		413			930
Total allowance on originated loans and leases		124,196		(7,481	)		1,617			(5,864	)		11,287			129,619
Purchased credit-impaired loans		658		—			—			—			36			695
Other acquired loans		6,287		(153	)		282			129			(546	)		5,869
Total allowance on acquired loans		6,945		(153	)		282			129			(510	)		6,564
Total allowance	$	131,141	$	(7,634	)	$	1,899		$	(5,735	)	$	10,777		$	136,183
Nine Months Ended September 30, 2015
Commercial real estate	$	37,588	$	(3,237	)	$	779		$	(2,458	)	$	6,723		$	41,853
Commercial and industrial		32,645		(2,684	)		1,386			(1,298	)		3,887			35,234
Commercial leases		2,398		(328	)		95			(233	)		249			2,414
Total commercial loans and leases		72,631		(6,249	)		2,260			(3,989	)		10,859			79,501
Direct installment		20,538		(8,108	)		1,131			(6,977	)		7,775			21,336
Residential mortgages		8,024		(891	)		53			(838	)		1,480			8,666
Indirect installment		7,504		(4,433	)		898			(3,535	)		5,644			9,613
Consumer lines of credit		8,496		(1,205	)		132			(1,073	)		2,150			9,573
Other		759		(1,062	)		44			(1,018	)		1,189			930
Total allowance on originated loans and leases		117,952		(21,948	)		4,518			(17,430	)		29,097			129,619
Purchased credit-impaired loans		660		(64	)		19			(45	)		80			695
Other acquired loans		7,314		(698	)		653			(45	)		(1,400	)		5,869
Total allowance on acquired loans		7,974		(762	)		672			(90	)		(1,320	)		6,564
Total allowance	$	125,926	$	(22,710	)	$	5,190		$	(17,520	)	$	27,777		$	136,183
Three Months Ended September 30, 2014
Commercial real estate	$	38,478	$	(1,724	)	$	506		$	(1,218	)	$	(80	)	$	37,180
Commercial and industrial		33,017		(1,796	)		192			(1,604	)		2,883			34,296
Commercial leases		2,079		(167	)		11			(156	)		282			2,205
Total commercial loans and leases		73,574		(3,687	)		709			(2,978	)		3,085			73,681
Direct installment		16,844		(2,369	)		271			(2,098	)		4,814			19,560
Residential mortgages		5,506		(87	)		13			(74	)		1,218			6,650
Indirect installment		6,693		(898	)		211			(687	)		364			6,370
Consumer lines of credit		7,664		(360	)		50			(310	)		587			7,941
Other		907		(341	)		9			(332	)		(208	)		367
Total allowance on originated loans and leases		111,188		(7,742	)		1,263			(6,479	)		9,860			114,569
Purchased credit-impaired loans		448		(712	)		1			(711	)		1,026			763
Other acquired loans		5,112		(113	)		(41	)		(154	)		311			5,269
Total allowance on acquired loans		5,560		(825	)		(40	)		(865	)		1,337			6,032
Total allowance	$	116,748	$	(8,567	)	$	1,223		$	(7,344	)	$	11,197		$	120,601
Nine Months Ended September 30, 2014
Commercial real estate	$	32,548	$	(5,519	)	$	1,068		$	(4,451	)	$	9,083		$	37,180
Commercial and industrial		32,603		(2,849	)		730			(2,119	)		3,812			34,296
Commercial leases		1,903		(317	)		93			(224	)		526			2,205
Total commercial loans and leases		67,054		(8,685	)		1,891			(6,794	)		13,421			73,681
Direct installment		17,824		(7,154	)		821			(6,333	)		8,069			19,560
Residential mortgages		5,836		(356	)		61			(295	)		1,109			6,650
Indirect installment		6,409		(2,396	)		658			(1,738	)		1,699			6,370
Consumer lines of credit		7,231		(1,023	)		143			(880	)		1,590			7,941
Other		530		(910	)		19			(891	)		728			367
Total allowance on originated loans and leases		104,884		(20,524	)		3,593			(16,931	)		26,616			114,569
Purchased credit-impaired loans		1,000		(2,614	)		1			(2,613	)		2,376			763
Other acquired loans		4,900		(230	)		983			753			(384	)		5,269
Total allowance on acquired loans		5,900		(2,844	)		984			(1,860	)		1,992			6,032
Total allowance	$	110,784	$	(23,368	)	$	4,577		$	(18,791	)	$	28,608		$	120,601

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
September 30, 2015
Commercial real estate	$	919	$	40,934	$	3,322,669	$	14,182	$	3,308,487
Commercial and industrial		1,590		33,644		2,410,186		6,186		2,404,000
Commercial leases		—		2,414		199,130		—		199,130
Total commercial loans and leases		2,509		76,992		5,931,985		20,368		5,911,617
Direct installment		—		21,336		1,643,345		—		1,643,345
Residential mortgages		—		8,666		1,013,254		—		1,013,254
Indirect installment		—		9,613		973,216		—		973,216
Consumer lines of credit		—		9,573		1,003,278		—		1,003,278
Other		—		930		53,860		—		53,860
	$	2,509	$	127,110	$	10,618,938	$	20,368	$	10,598,570
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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Stock Incentive Plans - Summary of Information Concerning Restricted Stock Awards (Detail) - $ / shares	9 Months Ended
	Sep. 30, 2015	Sep. 30, 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, Granted	402,947	364,065
Awards, Net adjustment due to performance	8,884	(87,512)
Awards, Vested	(471,997)	(703,428)
Awards, Forfeited	(29,428)	(50,849)
Awards, Dividend reinvestment	30,551	34,521
Awards, Unvested awards outstanding at end of period	1,295,050	1,285,830
Weighted Average Grant Price, Unvested awards outstanding at beginning of period	$ 11.86	$ 10.23
Weighted Average Grant Price, Granted	13.16	13.61
Weighted Average Grant Price, Net adjustment due to performance	22.73	11.41
Weighted Average Grant Price, Vested	10.66	8.79
Weighted Average Grant Price, Forfeited	13.46	11.47
Weighted Average Grant Price, Dividend reinvestment	11.32	12.73
Weighted Average Grant Price, Unvested awards outstanding at end of period	$ 12.73	$ 11.90

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Cash Flow Information (Tables)

9 Months Ended

Sep. 30, 2015

Supplemental Cash Flow Elements [Abstract]

Summary of Supplemental Cash Flow Information

Following is a summary of supplemental cash flow information:

Nine Months Ended September 30	2015		2014
Interest paid on deposits and other borrowings	$	35,531	$	31,804
Income taxes paid		41,000		17,000
Transfers of loans to other real estate owned		6,901		7,784
Financing of other real estate owned sold		372		287

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Federal Home Loan Bank Stock - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Federal Home Loan Bank stock	$ 44,845	$ 54,751

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Borrowings - Junior Subordinated Debt Trusts (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Subordinated Borrowing [Line Items]
Junior subordinated debt	$ 58,285	$ 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	1.99%
Description of variable rate	Variable; 3-month 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	$ 36,120
Stated Maturity Date	Oct. 18, 2034
Interest Rate	2.48%
Description of variable rate	Variable; 3-month 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

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Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Assets
Cash and due from banks	$ 208,560	$ 196,240
Interest bearing deposits with banks	50,206	91,153
Cash and Cash Equivalents	258,766	287,393
Securities available for sale	1,578,526	1,534,065
Securities held to maturity (fair value of $1,546,135 and $1,468,258)	1,526,290	1,453,355
Residential mortgage loans held for sale	3,575	6,180
Loans and leases, net of unearned income of $48,830 and $56,131	11,873,645	11,247,038
Allowance for credit losses	(136,183)	(125,926)
Net Loans and Leases	11,737,462	11,121,112
Premises and equipment, net	161,689	168,756
Goodwill	834,141	832,213
Core deposit and other intangible assets, net	46,417	47,504
Bank owned life insurance	306,061	301,771
Other assets	383,146	374,741
Total Assets	16,836,073	16,127,090
Liabilities
Non-interest bearing demand	2,911,435	2,647,623
Interest bearing demand	5,558,322	4,547,628
Savings	1,736,350	1,575,922
Certificates and other time deposits	2,553,629	2,611,035
Total Deposits	12,759,736	11,382,208
Short-term borrowings	1,287,302	2,041,658
Long-term borrowings	542,653	541,443
Other liabilities	151,633	140,325
Total Liabilities	14,741,324	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 - 176,513,189 and 175,450,303 shares	1,766	1,754
Additional paid-in capital	1,805,926	1,798,984
Retained earnings	227,287	176,120
Accumulated other comprehensive loss	(34,397)	(46,003)
Treasury stock - 1,149,750 and 1,458,045 shares at cost	(12,715)	(16,281)
Total Stockholders' Equity	2,094,749	2,021,456
Total Liabilities and Stockholders' Equity	$ 16,836,073	$ 16,127,090

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Mergers and Acquisitions - Additional Information (Detail) $ in Thousands	Sep. 18, 2015 USD ($) Branch	Sep. 03, 2015 USD ($) Branch	Aug. 04, 2015 USD ($) shares	Sep. 19, 2014 USD ($) shares	Feb. 15, 2014 USD ($) shares	Sep. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)
Business Acquisition [Line Items]
Goodwill recorded as a result of merger						$ 834,141	$ 832,213
BCSB Bancorp, Inc. (BCSB) [Member]
Business Acquisition [Line Items]
Deposits acquired as a result of merger					$ 532,197
Goodwill recorded as a result of merger					42,451
Core deposit intangibles recorded as result of the acquisition					6,591
Assets acquired as a result of merger					596,122
Loans acquired as a result of merger					304,932
Value of acquisition					$ 80,547
Common shares issued | shares					6,730,597
Common shares acquired | shares					3,235,961
OBA Financial Services, Inc. (OBA) [Member]
Business Acquisition [Line Items]
Deposits acquired as a result of merger				$ 295,922
Goodwill recorded as a result of merger				20,107
Core deposit intangibles recorded as result of the acquisition				4,304
Assets acquired as a result of merger				390,160
Loans acquired as a result of merger				291,393
Value of acquisition				$ 85,554
Common shares issued | shares				7,170,037
Common shares acquired | shares				4,025,895
Metro Bancorp Inc [Member]
Business Acquisition [Line Items]
Assets acquired as a result of merger			$ 3,001,357
Value of acquisition			$ 474,000
Common shares issued | shares			33,600,000
Number of shares entitled to receive as per Merger agreement, Ratio			2.373
Common shares to be acquired | shares			14,100,000
Bank of America [Member]
Business Acquisition [Line Items]
Deposits acquired as a result of merger	$ 154,619
Number of branch-banking locations acquired | Branch	5
Goodwill recorded as a result of merger	$ 2,539
Core deposit intangibles recorded as result of the acquisition	$ 3,081
Fifth Third Bank [Member]
Business Acquisition [Line Items]
Deposits acquired as a result of merger		$ 383,000
Number of branch-banking locations acquired | Branch		17

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Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 30, 2015	Sep. 30, 2015	Sep. 30, 2014	Dec. 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 reserves for commercial loan		$ 500
Transfer of equity security to non-marketable equity securities	$ 56
Impaired loans, carrying amount		66,692		$ 69,450
Allocated allowance for loan losses		2,508
Fair value of allocated allowance		2,935
Estimated costs to sell		216
Provision for fair value measurements included in allowance for loan losses		1,329
Carrying amount of OREO		9,320
Written down of OREO		6,476
Fair value of OREO		7,322
Estimated cost to sell OREO		846
Loss from OREO included in earnings		$ 2,844
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		$ 5,227
Allocated allowance for loan losses		2,935		1,705
Fair value of OREO		7,322		$ 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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Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Stockholders' Equity [Abstract]
Common stock dividends per share	$ 0.12	$ 0.12	$ 0.36	$ 0.36

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Business Segments - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2015 Segment
Segment Reporting [Abstract]
Number of reportable segments	4

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Loans and Leases - Age Analysis of Past Due Loans, by Class (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	$ 11,873,645	$ 11,247,038
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	3,949,246	3,815,708
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	2,491,355	2,318,015
Commercial Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	199,130	177,824
Total Commercial Loans and Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	6,639,731	6,311,547
Direct Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,692,638	1,644,621
Residential Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,386,386	1,263,053
Indirect Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	974,028	875,551
Consumer Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,127,002	1,110,976
Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	53,860	41,290
Originated Loans and Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	43,330	41,275
> 90 Days Past Due and Still Accruing	6,000	9,248
Non-Accrual	45,436	45,113
Total Past Due	94,766	95,636
Current	10,524,172	9,570,509
Total Loans	10,618,938	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	6,040	9,601
> 90 Days Past Due and Still Accruing	3	313
Non-Accrual	25,262	24,132
Total Past Due	31,305	34,046
Current	3,291,364	2,997,764
Total Loans	3,322,669	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	3,854	2,446
> 90 Days Past Due and Still Accruing	3	3
Non-Accrual	9,529	8,310
Total Past Due	13,386	10,759
Current	2,396,800	2,187,034
Total Loans	2,410,186	2,197,793
Originated Loans and Leases [Member] | Commercial Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	709	961
> 90 Days Past Due and Still Accruing	14	43
Non-Accrual	835	722
Total Past Due	1,558	1,726
Current	197,572	176,098
Total Loans	199,130	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	10,603	13,008
> 90 Days Past Due and Still Accruing	20	359
Non-Accrual	35,626	33,164
Total Past Due	46,249	46,531
Current	5,885,736	5,360,896
Total Loans	5,931,985	5,407,427
Originated Loans and Leases [Member] | Direct Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	9,874	9,333
> 90 Days Past Due and Still Accruing	3,326	3,617
Non-Accrual	4,718	7,117
Total Past Due	17,918	20,067
Current	1,625,427	1,559,703
Total Loans	1,643,345	1,579,770
Originated Loans and Leases [Member] | Residential Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	11,121	8,709
> 90 Days Past Due and Still Accruing	1,334	3,891
Non-Accrual	2,971	2,964
Total Past Due	15,426	15,564
Current	997,828	802,022
Total Loans	1,013,254	817,586
Originated Loans and Leases [Member] | Indirect Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	8,213	7,804
> 90 Days Past Due and Still Accruing	522	684
Non-Accrual	1,133	1,149
Total Past Due	9,868	9,637
Current	963,348	864,008
Total Loans	973,216	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	3,385	2,408
> 90 Days Past Due and Still Accruing	629	562
Non-Accrual	988	719
Total Past Due	5,002	3,689
Current	998,276	942,738
Total Loans	1,003,278	946,427
Originated Loans and Leases [Member] | Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	134	13
> 90 Days Past Due and Still Accruing	169	135
Total Past Due	303	148
Current	53,557	41,142
Total Loans	53,860	41,290
Acquired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	21,604	24,678
> 90 Days Past Due and Still Accruing	28,551	38,024
Non-Accrual	1,862
Total Past Due	52,017	62,702
Current	1,288,288	1,612,959
Discount	(85,598)	(94,768)
Total Loans	1,254,707	1,580,893
Acquired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	10,510	12,076
> 90 Days Past Due and Still Accruing	11,108	12,368
Non-Accrual	1,303
Total Past Due	22,921	24,444
Current	641,768	799,991
Discount	(38,112)	(40,537)
Total Loans	626,577	783,898
Acquired Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	686	687
> 90 Days Past Due and Still Accruing	527	1,968
Non-Accrual	107
Total Past Due	1,320	2,655
Current	87,163	127,535
Discount	(7,314)	(9,968)
Total Loans	81,169	120,222
Acquired Loans [Member] | Total Commercial Loans and Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	11,196	12,763
> 90 Days Past Due and Still Accruing	11,635	14,336
Non-Accrual	1,410
Total Past Due	24,241	27,099
Current	728,931	927,526
Discount	(45,426)	(50,505)
Total Loans	707,746	904,120
Acquired Loans [Member] | Direct Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	670	2,670
> 90 Days Past Due and Still Accruing	834	1,443
Total Past Due	1,504	4,113
Current	46,981	59,532
Discount	808	1,206
Total Loans	49,293	64,851
Acquired Loans [Member] | Residential Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	8,607	8,159
> 90 Days Past Due and Still Accruing	15,261	19,936
Total Past Due	23,868	28,095
Current	386,425	456,810
Discount	(37,161)	(39,438)
Total Loans	373,132	445,467
Acquired Loans [Member] | Indirect Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	26	38
> 90 Days Past Due and Still Accruing	11	30
Total Past Due	37	68
Current	801	2,179
Discount	(26)	(341)
Total Loans	812	1,906
Acquired Loans [Member] | Consumer Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	1,105	1,048
> 90 Days Past Due and Still Accruing	810	2,279
Non-Accrual	452
Total Past Due	2,367	3,327
Current	125,150	166,912
Discount	(3,793)	(5,690)
Total Loans	$ 123,724	$ 164,549

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Fair Value Measurements - Additional Information about Assets Measured at Fair Value on Non-Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 2,508
Other real estate owned	7,322
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	2,935	$ 1,705
Other real estate owned	7,322	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	1,016	177
Other real estate owned	5,223	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	1,919	1,528
Other real estate owned	$ 2,099	$ 2,365

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Commitments, Credit Risk and Contingencies (Tables)

9 Months Ended

Sep. 30, 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:

	September 30, 2015		December 31, 2014
Commitments to extend credit	$	3,527,479	$	3,665,481
Standby letters of credit		97,875		121,186

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Loans and Leases - Summary of Troubled Debt Restructurings by Class of Loans and Leases, Payment Default (Detail) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015 USD ($) Contract	Sep. 30, 2014 USD ($) Contract	Sep. 30, 2015 USD ($) Contract	Sep. 30, 2014 USD ($) Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts		25	47	88	87
Recorded Investment | $	[1]	$ 168	$ 449	$ 657	$ 826
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts				1
Recorded Investment | $	[1]			$ 204
Total Commercial Loans and Leases [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts				1
Recorded Investment | $	[1]			$ 204
Direct Installment [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts		22	41	75	80
Recorded Investment | $	[1]	$ 87	$ 356	$ 254	$ 732
Residential Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts		2	2	5	2
Recorded Investment | $	[1]	$ 75	$ 33	$ 179	$ 33
Indirect Installment [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts		1	3	6	4
Recorded Investment | $	[1]	$ 6	$ 10	$ 12	$ 11
Consumer Lines of Credit [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts			1	1	1
Recorded Investment | $	[1]		$ 50	$ 8	$ 50

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

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Retirement Plans

9 Months Ended

Sep. 30, 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 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						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Service cost	$	18		$	15		$	52		$	47
Interest cost		1,470			1,610			4,424			4,802
Expected return on plan assets		(2,491	)		(2,486	)		(7,473	)		(7,460	)
Amortization:
Unrecognized net transition asset		—			(6	)		—			(16	)
Unrecognized prior service cost		2			2			6			6
Unrecognized loss		518			347			1,590			1,021
Net periodic pension credit	$	(483	)	$	(518	)	$	(1,401	)	$	(1,600	)

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 $5,794 and $7,595 for the nine months ended September 30, 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.

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Stock Incentive Plans (Tables)

9 Months Ended

Sep. 30, 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:

	Nine Months Ended September 30,
	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
Granted		402,947			13.16		364,065			13.61
Net adjustment due to performance		8,884			22.73		(87,512	)		11.41
Vested		(471,997	)		10.66		(703,428	)		8.79
Forfeited		(29,428	)		13.46		(50,849	)		11.47
Dividend reinvestment		30,551			11.32		34,521			12.73
Unvested awards outstanding at end of period		1,295,050			12.73		1,285,830			11.90

Components of Restricted Stock Awards

The components of the restricted stock awards as of September 30, 2015 are as follows:

	Service- Based Awards		Performance- Based Awards		Total
Unvested awards		648,154		646,896		1,295,050
Unrecognized compensation expense	$	4,458	$	2,535	$	6,993
Intrinsic value	$	8,394	$	8,377	$	16,771
Weighted average remaining life (in years)		2.11		1.99		2.05

Summary of Information Concerning Stock Option Awards

The following table summarizes certain information concerning stock option awards:

	Nine Months Ended September 30,
	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 acquisitions		—			—		805,507			7.39
Exercised		(88,899	)		5.61		(140,817	)		6.21
Forfeited		(2,182	)		4.34		(54,962	)		24.41
Options outstanding and exercisable at end of period		477,753			9.48		1,143,252			8.64

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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	9 Months Ended	12 Months Ended
	Sep. 30, 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	(39)	5,676
Accretion included in earnings	4	662
Purchases	0	0
Issuances	0	0
Sales/redemptions		(51,527)
Settlements	(201)	(431)
Transfers from Level 3	(56)
Transfers into Level 3	0	0
Balance at end of period	1,603	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 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	(36)	65
Purchases	0	0
Issuances	0	0
Transfers from Level 3	(56)
Transfers into Level 3	0	0
Balance at end of period	383	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	(3)	3
Accretion included in earnings	4	5
Purchases	0	0
Issuances	0	0
Settlements	(201)	(332)
Transfers into Level 3	0	0
Balance at end of period	$ 1,220	$ 1,420

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Comprehensive Income

9 Months Ended

Sep. 30, 2015

Equity [Abstract]

Comprehensive Income

COMPREHENSIVE INCOME

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

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Net income	$	40,053		$	35,391		$	120,527		$	104,746
Other comprehensive income (loss):
Securities available for sale:
Unrealized gains (losses) arising during the period, net of tax expense (benefit) of $3,649, $(1,551), $4,302 and $10,399		6,777			(2,881	)		7,989			19,312
Reclassification adjustment for gains included in net income, net of tax expense of $110, $412, $112 and $3,995		(204	)		(766	)		(207	)		(7,420	)
Derivative instruments:
Unrealized gains arising during the period, net of tax expense of $1,709, $40, $2,353 and $2,979		3,174			74			4,370			5,532
Reclassification adjustment for gains included in net income, net of tax expense of $286, $293, $854 and $867		(531	)		(543	)		(1,586	)		(1,610	)
Pension and postretirement benefit obligations:
Unrealized gains arising during the period, net of tax expense of $183, $121, $560 and $355		340			224			1,040			659
Other comprehensive income (loss)		9,556			(3,892	)		11,606			16,473
Comprehensive income	$	49,609		$	31,499		$	132,133		$	121,219

The amounts reclassified from AOCI related to securities available for sale are included in net securities 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 taxes 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
Nine Months Ended September 30, 2015
Balance at beginning of period	$	(440	)	$	(143	)	$	(45,420	)	$	(46,003	)
Other comprehensive income before reclassifications		7,989			4,370			1,040			13,399
Amounts reclassified from AOCI		(207	)		(1,586	)		—			(1,793	)
Net current period other comprehensive income		7,782			2,784			1,040			11,606
Balance at end of period	$	7,342		$	2,641		$	(44,380	)	$	(34,397	)

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Allowance for Credit Losses - Summary of Individual and Collective Allowance for Credit Losses and Loan and Lease Balances by Class (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Valuation Allowance [Line Items]
Allowance, Individually Evaluated for Impairment	$ 2,509	$ 1,179
Allowance, Collectively Evaluated for Impairment	127,110	116,773
Loans and Leases	11,873,645	11,247,038
Loans Outstanding, Individually Evaluated for Impairment	20,368	19,789
Loans Outstanding, Collectively Evaluated for Impairment	10,598,570	9,646,356
Commercial Real Estate [Member]
Valuation Allowance [Line Items]
Allowance, Individually Evaluated for Impairment	919	399
Allowance, Collectively Evaluated for Impairment	40,934	37,189
Loans and Leases	3,949,246	3,815,708
Loans Outstanding, Individually Evaluated for Impairment	14,182	13,952
Loans Outstanding, Collectively Evaluated for Impairment	3,308,487	3,017,858
Commercial and Industrial [Member]
Valuation Allowance [Line Items]
Allowance, Individually Evaluated for Impairment	1,590	780
Allowance, Collectively Evaluated for Impairment	33,644	31,865
Loans and Leases	2,491,355	2,318,015
Loans Outstanding, Individually Evaluated for Impairment	6,186	5,837
Loans Outstanding, Collectively Evaluated for Impairment	2,404,000	2,191,956
Commercial Leases [Member]
Valuation Allowance [Line Items]
Allowance, Collectively Evaluated for Impairment	2,414	2,398
Loans and Leases	199,130	177,824
Loans Outstanding, Collectively Evaluated for Impairment	199,130	177,824
Total Commercial Loans and Leases [Member]
Valuation Allowance [Line Items]
Allowance, Individually Evaluated for Impairment	2,509	1,179
Allowance, Collectively Evaluated for Impairment	76,992	71,452
Loans and Leases	6,639,731	6,311,547
Loans Outstanding, Individually Evaluated for Impairment	20,368	19,789
Loans Outstanding, Collectively Evaluated for Impairment	5,911,617	5,387,638
Direct Installment [Member]
Valuation Allowance [Line Items]
Allowance, Collectively Evaluated for Impairment	21,336	20,538
Loans and Leases	1,692,638	1,644,621
Loans Outstanding, Collectively Evaluated for Impairment	1,643,345	1,579,770
Residential Mortgages [Member]
Valuation Allowance [Line Items]
Allowance, Collectively Evaluated for Impairment	8,666	8,024
Loans and Leases	1,386,386	1,263,053
Loans Outstanding, Collectively Evaluated for Impairment	1,013,254	817,586
Indirect Installment [Member]
Valuation Allowance [Line Items]
Allowance, Collectively Evaluated for Impairment	9,613	7,504
Loans and Leases	974,028	875,551
Loans Outstanding, Collectively Evaluated for Impairment	973,216	873,645
Consumer Lines of Credit [Member]
Valuation Allowance [Line Items]
Allowance, Collectively Evaluated for Impairment	9,573	8,496
Loans and Leases	1,127,002	1,110,976
Loans Outstanding, Collectively Evaluated for Impairment	1,003,278	946,427
Other [Member]
Valuation Allowance [Line Items]
Allowance, Collectively Evaluated for Impairment	930	759
Loans and Leases	53,860	41,290
Loans Outstanding, Collectively Evaluated for Impairment	53,860	41,290
Originated Loans [Member]
Valuation Allowance [Line Items]
Loans and Leases	10,618,938	9,666,145
Originated Loans [Member] | Commercial Real Estate [Member]
Valuation Allowance [Line Items]
Loans and Leases	3,322,669	3,031,810
Originated Loans [Member] | Commercial and Industrial [Member]
Valuation Allowance [Line Items]
Loans and Leases	2,410,186	2,197,793
Originated Loans [Member] | Commercial Leases [Member]
Valuation Allowance [Line Items]
Loans and Leases	199,130	177,824
Originated Loans [Member] | Total Commercial Loans and Leases [Member]
Valuation Allowance [Line Items]
Loans and Leases	5,931,985	5,407,427
Originated Loans [Member] | Direct Installment [Member]
Valuation Allowance [Line Items]
Loans and Leases	1,643,345	1,579,770
Originated Loans [Member] | Residential Mortgages [Member]
Valuation Allowance [Line Items]
Loans and Leases	1,013,254	817,586
Originated Loans [Member] | Indirect Installment [Member]
Valuation Allowance [Line Items]
Loans and Leases	973,216	873,645
Originated Loans [Member] | Consumer Lines of Credit [Member]
Valuation Allowance [Line Items]
Loans and Leases	1,003,278	946,427
Originated Loans [Member] | Other [Member]
Valuation Allowance [Line Items]
Loans and Leases	$ 53,860	$ 41,290

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Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Operating Activities
Net income	$ 120,527	$ 104,746
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization and accretion	31,412	29,007
Provision for credit losses	27,777	28,608
Deferred tax expense (benefit)	3,874	(2,533)
Net securities gains	(319)	(11,415)
Tax benefit of stock-based compensation	(5)	(2,198)
Loans originated for sale	(336,776)	(98,741)
Loans sold	346,174	105,169
Gain on sale of loans	(6,794)	(3,721)
Net change in:
Interest receivable	(4,457)	(1,590)
Interest payable	(414)	(1,058)
Securities classified as trading in business combination and sold		241,595
Bank owned life insurance	(4,266)	(5,205)
Other, net	8,144	(4,165)
Net cash flows provided by operating activities	184,877	378,499
Investing Activities
Net change in loans and leases	(657,586)	(888,443)
Securities available for sale:
Purchases	(279,636)	(686,108)
Sales	33,499	175,872
Maturities	212,140	245,942
Securities held to maturity:
Purchases	(279,998)	(436,519)
Sales		4,570
Maturities	203,689	153,624
Purchase of bank owned life insurance	(72,688)	(16)
Withdrawal/surrender of bank owned life insurance	72,664	18,715
Increase in premises and equipment	(7,304)	(12,580)
Net cash received in business combinations	148,159	60,035
Net cash flows used in investing activities	(627,061)	(1,364,908)
Financing Activities
Demand (non-interest bearing and interest bearing) and savings accounts	1,304,345	654,144
Time deposits	(78,764)	(224,733)
Short-term borrowings	(754,356)	348,827
Increase in long-term borrowings	20,976	376,418
Decrease in long-term borrowings	(19,804)	(87,677)
Net proceeds from issuance of common stock	10,515	7,795
Tax benefit of stock-based compensation	5	2,198
Cash dividends paid:
Preferred stock	(6,030)	(6,342)
Common stock	(63,330)	(60,234)
Net cash flows provided by financing activities	413,557	1,010,396
Net (Decrease) Increase in Cash and Cash Equivalents	(28,627)	23,987
Cash and cash equivalents at beginning of period	287,393	213,981
Cash and Cash Equivalents at End of Period	$ 258,766	$ 237,968

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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Securities held to maturity, fair value	$ 1,546,135	$ 1,468,258
Unearned income on loans	$ 48,830	$ 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	176,513,189	175,450,303
Treasury stock, shares	1,149,750	1,458,045

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Allowance for Credit Losses

9 Months Ended

Sep. 30, 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 September 30, 2015
Commercial real estate	$	39,872	$	(1,259	)	$	370		$	(889	)	$	2,870		$	41,853
Commercial and industrial		32,305		(584	)		290			(294	)		3,223			35,234
Commercial leases		2,223		(124	)		50			(74	)		265			2,414
Total commercial loans and leases		74,400		(1,967	)		710			(1,257	)		6,358			79,501
Direct installment		22,279		(2,722	)		565			(2,157	)		1,214			21,336
Residential mortgages		8,579		(268	)		14			(254	)		341			8,666
Indirect installment		8,909		(1,650	)		264			(1,386	)		2,090			9,613
Consumer lines of credit		9,118		(472	)		56			(416	)		871			9,573
Other		911		(402	)		8			(394	)		413			930
Total allowance on originated loans and leases		124,196		(7,481	)		1,617			(5,864	)		11,287			129,619
Purchased credit-impaired loans		658		—			—			—			36			695
Other acquired loans		6,287		(153	)		282			129			(546	)		5,869
Total allowance on acquired loans		6,945		(153	)		282			129			(510	)		6,564
Total allowance	$	131,141	$	(7,634	)	$	1,899		$	(5,735	)	$	10,777		$	136,183
Nine Months Ended September 30, 2015
Commercial real estate	$	37,588	$	(3,237	)	$	779		$	(2,458	)	$	6,723		$	41,853
Commercial and industrial		32,645		(2,684	)		1,386			(1,298	)		3,887			35,234
Commercial leases		2,398		(328	)		95			(233	)		249			2,414
Total commercial loans and leases		72,631		(6,249	)		2,260			(3,989	)		10,859			79,501
Direct installment		20,538		(8,108	)		1,131			(6,977	)		7,775			21,336
Residential mortgages		8,024		(891	)		53			(838	)		1,480			8,666
Indirect installment		7,504		(4,433	)		898			(3,535	)		5,644			9,613
Consumer lines of credit		8,496		(1,205	)		132			(1,073	)		2,150			9,573
Other		759		(1,062	)		44			(1,018	)		1,189			930
Total allowance on originated loans and leases		117,952		(21,948	)		4,518			(17,430	)		29,097			129,619
Purchased credit-impaired loans		660		(64	)		19			(45	)		80			695
Other acquired loans		7,314		(698	)		653			(45	)		(1,400	)		5,869
Total allowance on acquired loans		7,974		(762	)		672			(90	)		(1,320	)		6,564
Total allowance	$	125,926	$	(22,710	)	$	5,190		$	(17,520	)	$	27,777		$	136,183
Three Months Ended September 30, 2014
Commercial real estate	$	38,478	$	(1,724	)	$	506		$	(1,218	)	$	(80	)	$	37,180
Commercial and industrial		33,017		(1,796	)		192			(1,604	)		2,883			34,296
Commercial leases		2,079		(167	)		11			(156	)		282			2,205
Total commercial loans and leases		73,574		(3,687	)		709			(2,978	)		3,085			73,681
Direct installment		16,844		(2,369	)		271			(2,098	)		4,814			19,560
Residential mortgages		5,506		(87	)		13			(74	)		1,218			6,650
Indirect installment		6,693		(898	)		211			(687	)		364			6,370
Consumer lines of credit		7,664		(360	)		50			(310	)		587			7,941
Other		907		(341	)		9			(332	)		(208	)		367
Total allowance on originated loans and leases		111,188		(7,742	)		1,263			(6,479	)		9,860			114,569
Purchased credit-impaired loans		448		(712	)		1			(711	)		1,026			763
Other acquired loans		5,112		(113	)		(41	)		(154	)		311			5,269
Total allowance on acquired loans		5,560		(825	)		(40	)		(865	)		1,337			6,032
Total allowance	$	116,748	$	(8,567	)	$	1,223		$	(7,344	)	$	11,197		$	120,601
Nine Months Ended September 30, 2014
Commercial real estate	$	32,548	$	(5,519	)	$	1,068		$	(4,451	)	$	9,083		$	37,180
Commercial and industrial		32,603		(2,849	)		730			(2,119	)		3,812			34,296
Commercial leases		1,903		(317	)		93			(224	)		526			2,205
Total commercial loans and leases		67,054		(8,685	)		1,891			(6,794	)		13,421			73,681
Direct installment		17,824		(7,154	)		821			(6,333	)		8,069			19,560
Residential mortgages		5,836		(356	)		61			(295	)		1,109			6,650
Indirect installment		6,409		(2,396	)		658			(1,738	)		1,699			6,370
Consumer lines of credit		7,231		(1,023	)		143			(880	)		1,590			7,941
Other		530		(910	)		19			(891	)		728			367
Total allowance on originated loans and leases		104,884		(20,524	)		3,593			(16,931	)		26,616			114,569
Purchased credit-impaired loans		1,000		(2,614	)		1			(2,613	)		2,376			763
Other acquired loans		4,900		(230	)		983			753			(384	)		5,269
Total allowance on acquired loans		5,900		(2,844	)		984			(1,860	)		1,992			6,032
Total allowance	$	110,784	$	(23,368	)	$	4,577		$	(18,791	)	$	28,608		$	120,601

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
September 30, 2015
Commercial real estate	$	919	$	40,934	$	3,322,669	$	14,182	$	3,308,487
Commercial and industrial		1,590		33,644		2,410,186		6,186		2,404,000
Commercial leases		—		2,414		199,130		—		199,130
Total commercial loans and leases		2,509		76,992		5,931,985		20,368		5,911,617
Direct installment		—		21,336		1,643,345		—		1,643,345
Residential mortgages		—		8,666		1,013,254		—		1,013,254
Indirect installment		—		9,613		973,216		—		973,216
Consumer lines of credit		—		9,573		1,003,278		—		1,003,278
Other		—		930		53,860		—		53,860
	$	2,509	$	127,110	$	10,618,938	$	20,368	$	10,598,570
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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Cash Flow Information - Summary of Supplemental Cash Flow Information (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Statement of Cash Flows [Abstract]
Interest paid on deposits and other borrowings	$ 35,531	$ 31,804
Income taxes paid	41,000	17,000
Transfers of loans to other real estate owned	6,901	7,784
Financing of other real estate owned sold	$ 372	$ 287

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Earnings Per Common Share - Computation of Basic and Diluted Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share [Abstract]
Net income	$ 40,053	$ 35,391	$ 120,527	$ 104,746
Less: Preferred stock dividends	2,010	2,010	6,030	6,342
Net income available to common stockholders	$ 38,043	$ 33,381	$ 114,497	$ 98,404
Basic weighted average common shares outstanding	175,343,789	167,260,386	174,816,692	165,229,206
Net effect of dilutive stock options, warrants, restricted stock and convertible debt	1,169,043	1,623,741	1,383,450	1,695,637
Diluted weighted average common shares outstanding	176,512,832	168,884,127	176,200,142	166,924,843
Basic	$ 0.22	$ 0.20	$ 0.65	$ 0.60
Diluted	$ 0.22	$ 0.20	$ 0.65	$ 0.59

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Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2015	Oct. 31, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
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		175,377,201

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Borrowings

9 Months Ended

Sep. 30, 2015

Debt Disclosure [Abstract]

Borrowings

BORROWINGS

Following is a summary of short-term borrowings:

	September 30, 2015		December 31, 2014
Securities sold under repurchase agreements	$	256,320	$	882,696
Federal Home Loan Bank advances		450,000		820,000
Federal funds purchased		456,000		210,000
Subordinated notes		124,982		128,962
	$	1,287,302	$	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:

	September 30, 2015		December 31, 2014
Federal Home Loan Bank advances	$	400,017	$	400,042
Subordinated notes		84,351		83,155
Junior subordinated debt		58,285		58,246
	$	542,653	$	541,443

The Corporation’s banking affiliate has available credit with the FHLB of $4,467,170 of which $850,017 was used as of September 30, 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 nine months ended September 30, 2015 and the year ended December 31, 2014.

The Corporation had two unconsolidated subsidiary trusts as of September 30, 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 September 30, 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 September 30, 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		1.99	%	Variable; 3-month LIBOR + 165 basis points (bps)
Omega Financial Capital Trust I		36,000		1,114		36,120		10/18/34		2.48	%	Variable; 3-month LIBOR + 219 bps
	$	57,500	$	1,779	$	58,285

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Commitments, Credit Risk and Contingencies - Summary of Off-Balance Sheet Credit Risk Information (Detail) - USD ($) $ in Thousands	Sep. 30, 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	$ 3,527,479	$ 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	$ 97,875	$ 121,186

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Comprehensive Income - Changes in AOCI, Net of Tax, by Component (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 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			13,399
Amounts reclassified from AOCI			(1,793)
Net current period other comprehensive income	$ 9,556	$ (3,892)	11,606	$ 16,473
Accumulated other comprehensive income (loss), balance at end of period	(34,397)		(34,397)
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			7,989
Amounts reclassified from AOCI			(207)
Net current period other comprehensive income			7,782
Accumulated other comprehensive income (loss), balance at end of period	7,342		7,342
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			4,370
Amounts reclassified from AOCI			(1,586)
Net current period other comprehensive income			2,784
Accumulated other comprehensive income (loss), balance at end of period	2,641		2,641
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			1,040
Net current period other comprehensive income			1,040
Accumulated other comprehensive income (loss), balance at end of period	$ (44,380)		$ (44,380)

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Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Interest Income
Loans and leases, including fees	$ 120,875	$ 116,468	$ 358,074	$ 330,107
Securities:
Taxable	14,576	13,693	43,257	39,557
Nontaxable	1,707	1,356	4,564	3,934
Dividends	9	26	29	218
Other	30	23	90	70
Total Interest Income	137,197	131,566	406,014	373,886
Interest Expense
Deposits	7,948	7,457	23,033	22,067
Short-term borrowings	1,786	1,459	5,348	4,011
Long-term borrowings	2,262	2,031	6,744	5,172
Total Interest Expense	11,996	10,947	35,125	31,250
Net Interest Income	125,201	120,619	370,889	342,636
Provision for credit losses	10,777	11,197	27,777	28,608
Net Interest Income After Provision for Credit Losses	114,424	109,422	343,112	314,028
Non-Interest Income
Service charges	18,628	17,742	51,959	50,452
Trust fees	5,210	4,868	15,803	14,494
Insurance commissions and fees	4,423	4,169	12,351	12,805
Securities commissions and fees	3,304	3,132	9,958	8,525
Net securities gains	314	1,178	319	11,415
Mortgage banking operations	2,424	1,078	6,739	2,220
Bank owned life insurance	1,846	1,828	5,527	5,820
Other	5,210	3,557	16,637	13,081
Total Non-Interest Income	41,359	37,552	119,293	118,812
Non-Interest Expense
Salaries and employee benefits	51,859	49,590	151,559	147,008
Net occupancy	7,957	7,734	25,405	24,284
Equipment	8,237	7,625	23,583	21,701
Amortization of intangibles	2,034	2,455	6,148	7,199
Outside services	7,314	8,183	25,254	23,653
FDIC insurance	3,158	3,206	9,630	9,599
Merger and acquisition related	1,312	1,904	1,683	8,054
Other	16,278	15,150	46,041	41,099
Total Non-Interest Expense	98,149	95,847	289,303	282,597
Income Before Income Taxes	57,634	51,127	173,102	150,243
Income taxes	17,581	15,736	52,575	45,497
Net Income	40,053	35,391	120,527	104,746
Less: Preferred stock dividends	2,010	2,010	6,030	6,342
Net Income Available to Common Stockholders	$ 38,043	$ 33,381	$ 114,497	$ 98,404
Net Income per Common Share - Basic	$ 0.22	$ 0.20	$ 0.65	$ 0.60
Net Income per Common Share - Diluted	0.22	0.20	0.65	0.59
Cash Dividends per Common Share	$ 0.12	$ 0.12	$ 0.36	$ 0.36
Comprehensive income	$ 49,609	$ 31,499	$ 132,133	$ 121,219

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Mergers and Acquisitions

9 Months Ended

Sep. 30, 2015

Business Combinations [Abstract]

Mergers and Acquisitions

MERGERS AND ACQUISITIONS

Branch Purchase – Bank of America

On September 18, 2015, the Corporation completed its purchase of five branch-banking locations in southeastern Pennsylvania from Bank of America, in which the Corporation acquired approximately $154,619 in deposits. The assets and liabilities relating to the branches purchased were recorded on the Corporation’s consolidated balance sheet at their preliminary fair values as of September 18, 2015, and the related results of operations for these branches have been included in the Corporation’s consolidated statement of comprehensive income since that date. Based on the preliminary purchase price allocation, the Corporation recorded $2,539 in goodwill and $3,081 in core deposit intangibles. These fair value estimates are provisional amounts based on third party valuations that are currently under review. The goodwill for this transaction is expected to be deductible for income tax purposes.

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 $390,160 in assets, $291,393 in loans and $295,922 in deposits. The acquisition was valued at $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 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 the purchase price allocation, the Corporation recorded $20,107 in goodwill and $4,304 in core deposit intangibles as a result of the acquisition. 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.

Pending Acquisition – Metro Bancorp, Inc.

On August 4, 2015, the Corporation entered into a definitive merger agreement to acquire Metro Bancorp, Inc. (METR), a bank holding company based in Harrisburg, Pennsylvania with approximately $3,001,357 in total assets. The transaction is valued at approximately $474,000. Under the terms of the merger agreement, METR shareholders will be entitled to receive 2.373 shares of the Corporation’s common stock for each share of METR common stock. The Corporation expects to issue approximately 33.6 million shares of its common stock in exchange for approximately 14.1 million shares of METR common stock. METR’s banking affiliate, Metro Bank, will be merged into FNBPA. The transaction is expected to be completed in the first quarter of 2016, pending regulatory approvals, the approval of shareholders of the Corporation and METR, and the satisfaction of other closing conditions.

Pending Branch Purchase – Fifth Third Bank

On September 3, 2015, the Corporation announced that it entered into a purchase and assumption agreement to acquire approximately $383,000 in retail and private banking deposits, 17 branch-banking locations and related consumer loans in the Pittsburgh, Pennsylvania area from Fifth Third Bank. The transaction is expected to close during the second quarter of 2016, pending regulatory approval.

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Debt Offering

9 Months Ended

Sep. 30, 2015

Text Block [Abstract]

Debt Offering

DEBT OFFERING

On October 2, 2015, the Corporation completed its offering of $100,000 aggregate principal amount of 4.875% subordinated notes due in 2025. The subordinated notes will be treated as tier 2 capital for regulatory capital purposes. The net proceeds of the debt offering after deducting underwriting discounts and commissions and estimated offering expenses were $98,500. The Corporation intends to use the net proceeds from the sale of the subordinated notes for general corporate purposes, which may include investments at the holding company level, providing capital to support the growth of FNBPA and its business, repurchases of its common shares and the payment of the cash consideration components of future acquisitions.

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Income Taxes

9 Months Ended

Sep. 30, 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 September 30, 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 September 30, 2015, based on the levels of projected taxable income of some of its entities.

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Derivative and Hedging Activities

9 Months Ended

Sep. 30, 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:

	September 30, 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	$	250,000	$	4,918	$	855	$	200,000	$	2,109	$	2,330
Interest rate swaps – not designated		1,193,598		1		61,753		972,002		140		43,655
Equity contracts – not designated		1,180		12		—		1,210		47		—
Total subject to master netting arrangements		1,444,778		4,931		62,608		1,173,212		2,296		45,985
Not subject to master netting arrangements:
Interest rate swaps – not designated		1,193,598		61,348		1		972,002		43,602		128
Credit risk contracts – not designated		111,976		14		185		68,632		—		—
Equity contracts – not designated		1,180		—		12		1,210		—		47
Total not subject to master netting arrangements		1,306,754		61,362		198		1,041,844		43,602		175
	$	2,751,532	$	66,293	$	62,806	$	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 certain commercial loans and one of its FHLB advances 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 September 30, 2015 and December 31, 2014, the notional amount of these interest rate derivative agreements totaled $250,000 and $200,000, respectively. Fair values included in other assets and other liabilities on the consolidated balance sheet applicable to these agreements amounted to $4,918 and $855, respectively, at September 30, 2015, and $2,109 and $2,330, respectively, at December 31, 2014. For the nine months ended September 30, 2015, the amount reclassified from accumulated other comprehensive income (AOCI) to interest income and interest expense totaled $2,440 ($1,586 net of tax) and $115 ($75 net of tax), respectively.

As of September 30, 2015, the maximum length of time over which forecasted interest cash flows are hedged is eight years. In the twelve months that follow September 30, 2015, the Corporation expects to reclassify from the amount currently reported in AOCI net derivative gains of $2,219 ($1,443 net of tax), in association with interest on the hedged loans and FHLB advance. 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 September 30, 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 nine months ended September 30, 2015 and 2014, there was no hedge ineffectiveness. Also, during the nine months ended September 30, 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 only with 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 $1,193,598 at September 30, 2015. Fair values included in other assets and other liabilities on the consolidated balance sheet applicable to these agreements amounted to $61,349 and $61,754, respectively, at September 30, 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 $74,010 as of September 30, 2015 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 $185 at September 30, 2015 and $25 at December 31, 2014.

The fair values of risk participation agreements purchased and sold were not material at September 30, 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 $1,816 and $1,862 as of September 30, 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
September 30, 2015
Derivative Assets
Subject to master netting arrangements:
Interest rate contracts
Designated	$	4,918		—	$	4,918
Not designated		1		—		1
Equity contracts – not designated		12		—		12
Not subject to master netting arrangements:
Interest rate contracts – not designated		61,348		—		61,348
Credit contracts – not designated		14		—		14
	$	66,293		—	$	66,293
Derivative Liabilities
Subject to master netting arrangements:
Interest rate contracts
Designated	$	855		—	$	855
Not designated		61,753		—		61,753
Not subject to master netting arrangements:
Interest rate contracts – not designated		1		—		1
Credit contracts – not designated		185		—		185
Equity contracts – not designated		12		—		12
	$	62,806		—	$	62,806
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 the Balance Sheet		Amount Not Offset in the Balance Sheet
			Financial Instruments		Cash Collateral		Net Amount
September 30, 2015
Derivative Assets
Interest rate contracts:
Designated	$	4,918	$	2,557	$	2,361		—
Not designated		1		1		—		—
Equity contracts – not designated		12		12		—		—
	$	4,931	$	2,570	$	2,361		—
Derivative Liabilities
Interest rate contracts:
Designated	$	855	$	—	$	—	$	855
Not designated		61,753		31,827		28,290		1,636
	$	62,608	$	31,827	$	28,290	$	2,491
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 certain of the Corporation’s derivative financial instruments on the income statement:

	Income	Nine Months Ended
	Statement	September 30,
	Location	2015			2014
Interest Rate Contracts	Interest income - loans and leases	$	2,440		$	2,479
Interest Rate Contracts	Interest expense – short-term borrowings		115			—
Interest Rate Swaps	Other income		(364	)		(9	)
Credit Risk Contracts	Other income		(170	)		—

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 September 30, 2015 and December 31, 2014 are not material.

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Stock Incentive Plans - Components of Restricted Stock Awards (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested awards	1,295,050	1,354,093	1,285,830	1,729,033
Unrecognized compensation expense	$ 6,993
Intrinsic value	$ 16,771
Weighted average remaining life (in years)	2 years 18 days
Service-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested awards	648,154
Unrecognized compensation expense	$ 4,458
Intrinsic value	$ 8,394
Weighted average remaining life (in years)	2 years 1 month 10 days
Performance-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested awards	646,896
Unrecognized compensation expense	$ 2,535
Intrinsic value	$ 8,377
Weighted average remaining life (in years)	1 year 11 months 27 days

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Federal Home Loan Bank Stock

9 Months Ended

Sep. 30, 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 September 30, 2015 and December 31, 2014, the Corporation’s FHLB stock totaled $44,845 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 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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Loans and Leases - Summary of Commercial Loans and Leases by Credit Quality (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	$ 707,746	$ 904,120
Acquired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	626,577	783,898
Acquired Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	81,169	120,222
Originated Loans and Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	5,931,985	5,407,427
Originated Loans and Leases [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	3,322,669	3,031,810
Originated Loans and Leases [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	2,410,186	2,197,793
Originated Loans and Leases [Member] | Commercial Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	199,130	177,824
Pass [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	557,876	714,122
Pass [Member] | Acquired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	488,840	610,260
Pass [Member] | Acquired Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	69,036	103,862
Pass [Member] | Originated Loans and Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	5,650,170	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	3,195,455	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	2,259,932	2,085,893
Pass [Member] | Originated Loans and Leases [Member] | Commercial Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	194,783	174,677
Special Mention [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	51,638	77,397
Special Mention [Member] | Acquired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	49,669	73,891
Special Mention [Member] | Acquired Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	1,969	3,506
Special Mention [Member] | Originated Loans and Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	167,526	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	60,727	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	103,650	71,420
Special Mention [Member] | Originated Loans and Leases [Member] | Commercial Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	3,149	2,198
Substandard [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	98,232	112,601
Substandard [Member] | Acquired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	88,068	99,747
Substandard [Member] | Acquired Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	10,164	12,854
Substandard [Member] | Originated Loans and Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	111,780	122,584
Substandard [Member] | Originated Loans and Leases [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	65,568	81,951
Substandard [Member] | Originated Loans and Leases [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	45,014	39,684
Substandard [Member] | Originated Loans and Leases [Member] | Commercial Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	1,198	949
Doubtful [Member] | Originated Loans and Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	2,509	1,195
Doubtful [Member] | Originated Loans and Leases [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	919	399
Doubtful [Member] | Originated Loans and Leases [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	$ 1,590	$ 796

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New Accounting Standards

9 Months Ended

Sep. 30, 2015

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

New Accounting Standards

NEW ACCOUNTING STANDARDS

Business Combinations – Simplifying the Accounting for Measurement-Period Adjustments

In September 2015, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2015-16, Business Combinations – Simplifying the Accounting for Measurement-Period Adjustments. ASU 2015-16 eliminates the requirement that an acquirer in a business combination account for measurement-period adjustments retrospectively. Instead, an acquirer must recognize measurement-period adjustments in the period in which it determines the amount of the adjustment, including the effect on earnings of any amounts that would have been recorded in previous periods if the accounting had been completed at the acquisition date. The guidance is effective for fiscal periods beginning after December 15, 2015, and interim periods within those fiscal years. Early adoption is permitted. The adoption of this update will not have a material effect on the financial statements, results of operations or liquidity of the Corporation.

Insurance – Disclosures about Short-Duration Contracts

In May 2015, the FASB issued ASU 2015-09, Financial Services – Insurance. ASU 2015-09 requires insurance entities that issue short-duration contracts to provide additional disclosures about the liability for unpaid claims and claim adjustment expenses, including disclosure of information about significant changes in methodologies and assumptions used to calculate the liability, reasons for the change, and the effects on the financial statements. These additional disclosures will increase the transparency of significant estimates made in measuring those liabilities, improve comparability by requiring consistent disclosure of information, and provide financial statement users with information to facilitate analysis. ASU 2015-09 should be applied retrospectively and is effective for annual periods beginning after December 15, 2015, and interim periods beginning after December 15, 2016, with early adoption permitted. 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.

Cloud Computing Arrangements

In April 2015, the FASB issued ASU 2015-05, Intangibles-Goodwill and Other-Internal-Use Software. ASU 2015-05 provides guidance about whether a cloud computing arrangement includes a license for internal use software, and how to account for the software license element of the arrangement. This update eliminates the existing requirement to analogize the guidance on leases in ASC 840 in accounting for some software licenses. ASU 2015-05 is 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 or the impact that the adoption of this update will have on its financial statements.

Interest – Imputation of Interest

In April 2015, the FASB issued ASU 2015-03, Interest – Imputation of Interest. ASU 2015-03 requires debt issuance costs to be presented in the balance sheet as a direct deduction from the corresponding debt liability. The recognition and measurement guidance for debt issuance costs is not affected by the amendments in this update. ASU 2015-03 is effective for reporting periods beginning after December 15, 2015, with early adoption permitted. A reporting entity should apply the new guidance on a retrospective basis, wherein the balance sheet of each individual period presented should be adjusted to reflect the period-specific effects of applying the new guidance. 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.

Consolidation

In February 2015, the FASB issued ASU 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 ASU is 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 2015-01, Income Statement – Extraordinary and Unusual Items. ASU 2015-01 simplified income statement presentation by eliminating from GAAP the concept of extraordinary items. The ASU is 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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Securities

9 Months Ended

Sep. 30, 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
September 30, 2015
U.S. Treasury	$	29,704	$	300	$	—		$	30,004
U.S. government-sponsored entities		388,428		2,644		(305	)		390,767
Residential mortgage-backed securities:
Agency mortgage-backed securities		587,244		9,958		(82	)		597,120
Agency collateralized mortgage obligations		529,656		3,220		(4,948	)		527,928
Non-agency collateralized mortgage obligations		1,212		15		—			1,227
Commercial mortgage-backed securities		4,384		8		—			4,392
States of the U.S. and political subdivisions		10,927		345		—			11,272
Other debt securities		14,700		267		(414	)		14,553
Total debt securities		1,566,255		16,757		(5,749	)		1,577,263
Equity securities		975		288		—			1,263
	$	1,567,230	$	17,045	$	(5,749	)	$	1,578,526
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
September 30, 2015
U.S. Treasury	$	500	$	169	$	—		$	669
U.S. government-sponsored entities		146,528		1,964		(79	)		148,413
Residential mortgage-backed securities:
Agency mortgage-backed securities		669,221		15,887		(16	)		685,092
Agency collateralized mortgage obligations		462,191		3,556		(4,181	)		461,566
Non-agency collateralized mortgage obligations		3,055		15		—			3,070
Commercial mortgage-backed securities		17,334		468		—			17,802
States of the U.S. and political subdivisions		227,461		2,888		(826	)		229,523
	$	1,526,290	$	24,947	$	(5,102	)	$	1,546,135
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 September 30, 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					Nine Months Ended
	September 30,					September 30,
	2015		2014			2015			2014
Gross gains	$	314	$	1,191		$	328		$	19,939
Gross losses		—		(13	)		(9	)		(8,524	)
	$	314	$	1,178		$	319		$	11,415

During the first quarter of 2014, the Corporation strategically sold its 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 2016. Partially offsetting this gain was a net loss of $3,529 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 September 30, 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	$	4,994	$	5,027	$	1,940	$	1,951
Due from one to five years		423,858		426,751		139,429		140,465
Due from five to ten years		10,013		10,338		71,708		73,681
Due after ten years		4,894		4,480		161,412		162,508
		443,759		446,596		374,489		378,605
Residential mortgage-backed securities:
Agency mortgage-backed securities		587,244		597,120		669,221		685,092
Agency collateralized mortgage obligations		529,656		527,928		462,191		461,566
Non-agency collateralized mortgage obligations		1,212		1,227		3,055		3,070
Commercial mortgage-backed securities		4,384		4,392		17,334		17,802
Equity securities		975		1,263		—		—
	$	1,567,230	$	1,578,526	$	1,526,290	$	1,546,135

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 September 30, 2015 and December 31, 2014, securities with a carrying value of $2,062,257 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 $258,428 and $892,647 at September 30, 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
September 30, 2015
U.S. government-sponsored entities		3	$	59,823	$	(177	)		3	$	37,867	$	(128	)		6	$	97,690	$	(305	)
Residential mortgage-backed securities:
Agency mortgage-backed securities		1		18,591		(82	)		—		—		—			1		18,591		(82	)
Agency collateralized mortgage obligations		4		63,640		(123	)		18		228,010		(4,825	)		22		291,650		(4,948	)
Other debt securities		—		—		—			3		4,480		(414	)		3		4,480		(414	)
		8	$	142,054	$	(382	)		24	$	270,357	$	(5,367	)		32	$	412,411	$	(5,749	)
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
September 30, 2015
U.S. government-sponsored entities		—	$	—	$	—			1	$	14,921	$	(79	)		1	$	14,921	$	(79	)
Residential mortgage-backed securities:
Agency mortgage-backed securities		—		—		—			1		924		(16	)		1		924		(16	)
Agency collateralized mortgage obligations		3		46,120		(212	)		14		170,359		(3,969	)		17		216,479		(4,181	)
States of the U.S. and political subdivisions		24		46,933		(826	)		—		—		—			24		46,933		(826	)
		27	$	93,053	$	(1,038	)		16	$	186,204	$	(4,064	)		43	$	279,257	$	(5,102	)
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 that 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 three 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 $4,894 and $4,480 at September 30, 2015, respectively. The Corporation has concluded from its analysis performed at September 30, 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 Nine Months Ended September 30, 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 Nine Months Ended September 30, 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 nine months ended September 30, 2015 or 2014.

States of the U.S. and Political Subdivisions

The Corporation’s municipal bond portfolio of $238,733 as of September 30, 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 99.8% of the portfolio. Geographically, municipal bonds support the Corporation’s primary footprint as 93.6% 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 $1,492. In addition to the strong stand-alone ratings, 83.0% 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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Loans and Leases

9 Months Ended

Sep. 30, 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
September 30, 2015
Commercial real estate	$	3,322,669	$	626,577	$	3,949,246
Commercial and industrial		2,410,186		81,169		2,491,355
Commercial leases		199,130		—		199,130
Total commercial loans and leases		5,931,985		707,746		6,639,731
Direct installment		1,643,345		49,293		1,692,638
Residential mortgages		1,013,254		373,132		1,386,386
Indirect installment		973,216		812		974,028
Consumer lines of credit		1,003,278		123,724		1,127,002
Other		53,860		—		53,860
	$	10,618,938	$	1,254,707	$	11,873,645
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 $181,298 or 1.5% of total loans and leases at September 30, 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 September 30, 2015, 38.9% of the commercial real estate loans were owner-occupied, while the remaining 61.1% were non-owner-occupied, compared to 41.6% and 58.4%, respectively, as of December 31, 2014. As of September 30, 2015 and December 31, 2014, the Corporation had commercial construction loans of $294,249 and $296,156, respectively, representing 2.5% 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:

	September 30, 2015		December 31, 2014
Accounted for under ASC 310-30:
Outstanding balance	$	1,345,685	$	1,597,558
Carrying amount		1,094,604		1,344,171
Accounted for under ASC 310-20:
Outstanding balance		159,695		242,488
Carrying amount		153,539		228,748
Total acquired loans:
Outstanding balance		1,505,380		1,840,046
Carrying amount		1,248,143		1,572,919

The carrying amount of purchased credit impaired loans included in the table above totaled $8,766 at September 30, 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.

	Nine Months Ended
	September 30,
	2015			2014
Balance at beginning of period	$	331,899		$	305,646
Acquisitions		—			71,111
Reduction due to unexpected early payoffs		(35,601	)		(34,747	)
Reclass from non-accretable difference		24,489			9,925
Disposals/transfers		(509	)		(5,390	)
Accretion		(46,207	)		(54,664	)
Balance at end of period	$	274,071		$	291,881

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, or when the full amount of principal and interest due is not expected to be collected in full, 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:

	September 30, 2015			December 31, 2014
Non-accrual loans	$	47,298		$	45,113
Troubled debt restructurings		21,221			23,439
Total non-performing loans		68,519			68,552
Other real estate owned (OREO)		38,931			41,466
Total non-performing assets	$	107,450		$	110,018
Asset quality ratios:
Non-performing loans as a percent of total loans and leases		0.58	%		0.61	%
Non-performing loans + OREO as a percent of total loans and leases + OREO		0.90	%		0.97	%
Non-performing assets as a percent of total assets		0.64	%		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 $4,285 at September 30, 2015. Also, the recorded investment of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process at September 30, 2015 amounted to $12,786.

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
September 30, 2015
Commercial real estate	$	6,040	$	3	$	25,262	$	31,305	$	3,291,364	$	3,322,669
Commercial and industrial		3,854		3		9,529		13,386		2,396,800		2,410,186
Commercial leases		709		14		835		1,558		197,572		199,130
Total commercial loans and leases		10,603		20		35,626		46,249		5,885,736		5,931,985
Direct installment		9,874		3,326		4,718		17,918		1,625,427		1,643,345
Residential mortgages		11,121		1,334		2,971		15,426		997,828		1,013,254
Indirect installment		8,213		522		1,133		9,868		963,348		973,216
Consumer lines of credit		3,385		629		988		5,002		998,276		1,003,278
Other		134		169		—		303		53,557		53,860
	$	43,330	$	6,000	$	45,436	$	94,766	$	10,524,172	$	10,618,938
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		Non-Accrual		Total Past Due (1) (2)		Current		Discount			Total Loans
Acquired Loans
September 30, 2015
Commercial real estate	$	10,510	$	11,108	$	1,303	$	22,921	$	641,768	$	(38,112	)	$	626,577
Commercial and industrial		686		527		107		1,320		87,163		(7,314	)		81,169
Total commercial loans		11,196		11,635		1,410		24,241		728,931		(45,426	)		707,746
Direct installment		670		834		—		1,504		46,981		808			49,293
Residential mortgages		8,607		15,261		—		23,868		386,425		(37,161	)		373,132
Indirect installment		26		11		—		37		801		(26	)		812
Consumer lines of credit		1,105		810		452		2,367		125,150		(3,793	)		123,724
	$	21,604	$	28,551	$	1,862	$	52,017	$	1,288,288	$	(85,598	)	$	1,254,707
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 September 30, 2015 and December 31, 2014.

(2) Acquired loans are considered performing upon acquisition, regardless of whether the customer is contractually delinquent, as long as the Corporation can reasonably estimate the timing and amount of expected cash flows on such loans. In these instances, 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. Acquired loans are considered non-accrual or non-performing when, due to credit deterioration or other factors, the Corporation determines it is no longer able to reasonably estimate the timing and amount of expected cash flows on such loans. The Corporation does not recognize interest income on acquired loans considered non-accrual or non-performing.

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
September 30, 2015
Commercial real estate	$	3,195,455	$	60,727	$	65,568	$	919	$	3,322,669
Commercial and industrial		2,259,932		103,650		45,014		1,590		2,410,186
Commercial leases		194,783		3,149		1,198		—		199,130
	$	5,650,170	$	167,526	$	111,780	$	2,509	$	5,931,985
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
September 30, 2015
Commercial real estate	$	488,840	$	49,669	$	88,068		—	$	626,577
Commercial and industrial		69,036		1,969		10,164		—		81,169
	$	557,876	$	51,638	$	98,232		—	$	707,746
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 September 30, 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
September 30, 2015
Direct installment	$	1,630,566	$	12,779	$	1,643,345
Residential mortgages		1,000,774		12,480		1,013,254
Indirect installment		971,936		1,280		973,216
Consumer lines of credit		1,000,929		2,349		1,003,278
Other		53,860		—		53,860
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 Nine Months Ended September 30, 2015
Commercial real estate	$	35,733	$	25,035	$	2,057	$	27,092	$	919	$	26,928
Commercial and industrial		10,981		4,770		5,107		9,877		1,590		9,565
Commercial leases		835		835		—		835		—		767
Total commercial loans and leases		47,549		30,640		7,164		37,804		2,509		37,260
Direct installment		13,569		12,779		—		12,779		—		13,538
Residential mortgages		12,971		12,480		—		12,480		—		13,744
Indirect installment		3,220		1,280		—		1,280		—		1,168
Consumer lines of credit		2,565		2,349		—		2,349		—		2,134
	$	79,874	$	59,528	$	7,164	$	66,692	$	2,509	$	67,844
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
	$	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 $3,056; commercial and industrial of $579; direct installment of $1,427; residential mortgages of $558; indirect installment of $302; and consumer lines of credit of $642, totaling $6,564 at September 30, 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 originated TDRs:

	September 30, 2015		December 31, 2014
Accruing:
Performing	$	14,692	$	9,441
Non-performing		21,221		23,439
Non-accrual		7,800		8,272
	$	43,713	$	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 nine months ended September 30, 2015, the Corporation returned to performing status $7,577 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 $438 and $371 at September 30, 2015 and December 31, 2014, respectively, and pooled reserves for individual loans under $500 of $1,146 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 $3,350 and $3,448 at September 30, 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 originated loans, by class, that have been restructured:

	Three Months Ended September 30, 2015						Nine Months Ended September 30, 2015
	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	$	168
Commercial and industrial		—		—		—		1		5		4
Total commercial loans		—		—		—		3		317		172
Direct installment		121		1,757		1,726		361		5,064		4,835
Residential mortgages		10		232		233		31		1,048		1,074
Indirect installment		3		13		10		13		43		40
Consumer lines of credit		10		146		143		40		666		610
		144	$	2,148	$	2,112		448	$	7,138	$	6,731
	Three Months Ended September 30, 2014						Nine Months Ended September 30, 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		1	$	50	$	48		10	$	2,633	$	2,187
Commercial and industrial		2		126		119		3		323		307
Total commercial loans		3		176		167		13		2,956		2,494
Direct installment		116		1,323		1,240		378		4,922		4,693
Residential mortgages		9		480		470		33		1,847		1,784
Indirect installment		7		18		15		20		52		48
Consumer lines of credit		6		88		56		31		899		857
		141	$	2,085	$	1,948		475	$	10,676	$	9,876

Following is a summary of originated 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 September 30, 2015 (1)				Nine Months Ended September 30, 2015 (1)
	Number of Contracts		Recorded Investment		Number of Contracts		Recorded Investment
Commercial real estate		—	$	—		—	$	—
Commercial and industrial		—		—		1		204
Total commercial loans		—		—		1		204
Direct installment		22		87		75		254
Residential mortgages		2		75		5		179
Indirect installment		1		6		6		12
Consumer lines of credit		—		—		1		8
		25	$	168		88	$	657

	Three Months Ended September 30, 2014 (1)				Nine Months Ended September 30, 2014 (1)
	Number of Contracts		Recorded Investment		Number of Contracts		Recorded Investment
Direct installment		41	$	356		80	$	732
Residential mortgages		2		33		2		33
Indirect installment		3		10		4		11
Consumer lines of credit		1		50		1		50
		47	$	449		87	$	826

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

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Loans and Leases - Summary of Troubled Debt Restructurings by Class of Loans (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($) Contract	Sep. 30, 2014 USD ($) Contract	Sep. 30, 2015 USD ($) Contract	Sep. 30, 2014 USD ($) Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	144	141	448	475
Pre-Modification Outstanding Recorded Investment	$ 2,148	$ 2,085	$ 7,138	$ 10,676
Post-Modification Outstanding Recorded Investment	$ 2,112	$ 1,948	$ 6,731	$ 9,876
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract		1	2	10
Pre-Modification Outstanding Recorded Investment		$ 50	$ 312	$ 2,633
Post-Modification Outstanding Recorded Investment		$ 48	$ 168	$ 2,187
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract		2	1	3
Pre-Modification Outstanding Recorded Investment		$ 126	$ 5	$ 323
Post-Modification Outstanding Recorded Investment		$ 119	$ 4	$ 307
Total Commercial Loans and Leases [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract		3	3	13
Pre-Modification Outstanding Recorded Investment		$ 176	$ 317	$ 2,956
Post-Modification Outstanding Recorded Investment		$ 167	$ 172	$ 2,494
Direct Installment [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	121	116	361	378
Pre-Modification Outstanding Recorded Investment	$ 1,757	$ 1,323	$ 5,064	$ 4,922
Post-Modification Outstanding Recorded Investment	$ 1,726	$ 1,240	$ 4,835	$ 4,693
Residential Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	10	9	31	33
Pre-Modification Outstanding Recorded Investment	$ 232	$ 480	$ 1,048	$ 1,847
Post-Modification Outstanding Recorded Investment	$ 233	$ 470	$ 1,074	$ 1,784
Indirect Installment [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	3	7	13	20
Pre-Modification Outstanding Recorded Investment	$ 13	$ 18	$ 43	$ 52
Post-Modification Outstanding Recorded Investment	$ 10	$ 15	$ 40	$ 48
Consumer Lines of Credit [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	10	6	40	31
Pre-Modification Outstanding Recorded Investment	$ 146	$ 88	$ 666	$ 899
Post-Modification Outstanding Recorded Investment	$ 143	$ 56	$ 610	$ 857

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Stock Incentive Plans - Summary of Information Concerning Stock Option Awards (Detail) - $ / shares	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Shares, Options outstanding at beginning of period	568,834	533,524
Shares, Assumed from acquisitions		805,507
Shares, Exercised	(88,899)	(140,817)
Shares, Forfeited	(2,182)	(54,962)
Shares, Options outstanding and exercisable at end of period	477,753	1,143,252
Weighted Average Exercise Price, Options outstanding at beginning of period	$ 8.86	$ 11.50
Weighted Average Exercise Price, Assumed from acquisitions		7.39
Weighted Average Price per Share, Exercised	5.61	6.21
Weighted Average Exercise Price, Forfeited	4.34	24.41
Weighted Average Exercise Price, Options outstanding and exercisable at end of period	$ 9.48	$ 8.64

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Allowance for Credit Losses - Additional Information (Detail) $ in Thousands	Sep. 30, 2015 USD ($)
Receivables [Abstract]
Minimum reserves for commercial loan	$ 500

XML

Loans and Leases - Summary of Payment Status of Total TDRs (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings ("TDRs")	$ 43,713	$ 41,152
Performing [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings ("TDRs")	14,692	9,441
Non-Performing [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings ("TDRs")	21,221	23,439
Non-Accrual [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings ("TDRs")	$ 7,800	$ 8,272

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Earnings Per Share - Additional Information (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share [Abstract]
Common stock excluded from computation of diluted earnings per share	19,385	32,419	20,440	38,151

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Derivative and Hedging Activities (Tables)

9 Months Ended

Sep. 30, 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:

	September 30, 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	$	250,000	$	4,918	$	855	$	200,000	$	2,109	$	2,330
Interest rate swaps – not designated		1,193,598		1		61,753		972,002		140		43,655
Equity contracts – not designated		1,180		12		—		1,210		47		—
Total subject to master netting arrangements		1,444,778		4,931		62,608		1,173,212		2,296		45,985
Not subject to master netting arrangements:
Interest rate swaps – not designated		1,193,598		61,348		1		972,002		43,602		128
Credit risk contracts – not designated		111,976		14		185		68,632		—		—
Equity contracts – not designated		1,180		—		12		1,210		—		47
Total not subject to master netting arrangements		1,306,754		61,362		198		1,041,844		43,602		175
	$	2,751,532	$	66,293	$	62,806	$	2,215,056	$	45,898	$	46,160

Derivative Liabilities

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

Derivative Liabilities
Subject to master netting arrangements:
Interest rate contracts
Designated	$	855	—	$	855
Not designated		61,753	—		61,753
Not subject to master netting arrangements:
Interest rate contracts – not designated		1	—		1
Credit contracts – not designated		185	—		185
Equity contracts – not designated		12	—		12
	$	62,806	—	$	62,806

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

Derivative Assets

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
September 30, 2015
Derivative Assets
Subject to master netting arrangements:
Interest rate contracts
Designated	$	4,918		—	$	4,918
Not designated		1		—		1
Equity contracts – not designated		12		—		12
Not subject to master netting arrangements:
Interest rate contracts – not designated		61,348		—		61,348
Credit contracts – not designated		14		—		14
	$	66,293		—	$	66,293

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

Effect of Corporation's Derivative Financial Instruments on Income Statement

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

	Income	Nine Months Ended
	Statement	September 30,
	Location	2015			2014
Interest Rate Contracts	Interest income - loans and leases	$	2,440		$	2,479
Interest Rate Contracts	Interest expense – short-term borrowings		115			—
Interest Rate Swaps	Other income		(364	)		(9	)
Credit Risk Contracts	Other income		(170	)		—

Collateral Held By Counterparty [Member]

Derivative Liabilities

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

Derivative Liabilities
Interest rate contracts:
Designated	$	855	$	—	$	—	$	855
Not designated		61,753		31,827		28,290		1,636
	$	62,608	$	31,827	$	28,290	$	2,491

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

Derivative Assets

The following table presents a reconciliation of the net amounts of derivative assets 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
September 30, 2015
Derivative Assets
Interest rate contracts:
Designated	$	4,918	$	2,557	$	2,361		—
Not designated		1		1		—		—
Equity contracts – not designated		12		12		—		—
	$	4,931	$	2,570	$	2,361		—

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	—

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Securities - Summaries of Fair Values and Unrealized Losses of Securities, Segregated by Length of Impairment (Detail) $ in Thousands	Sep. 30, 2015 USD ($) Security	Dec. 31, 2014 USD ($) Security
Schedule Of Securities [Line Items]
Number of available for sale securities, Less than 1 year | Security	8	19
Number of available for sale securities, Greater than 1 year | Security	24	28
Number of available for sale securities | Security	32	47
Securities Available For Sale, Less than 12 Months, Fair Value	$ 142,054	$ 309,919
Securities Available For Sale, Less than 12 Months, Unrealized Losses	(382)	(1,559)
Securities Available For Sale, 12 Months or More, Fair Value	270,357	332,215
Securities Available For Sale, 12 Months or More, Unrealized Losses	(5,367)	(10,362)
Securities Available For Sale, Fair Value, Total	412,411	642,134
Securities Available For Sale, Unrealized Losses, Total	$ (5,749)	$ (11,921)
Number of held to maturity securities | Security	43	36
Securities Held To Maturity, Less than 12 Months, Fair Value	$ 93,053	$ 131,586
Securities Held To Maturity, Less than 12 Months, Unrealized Losses	(1,038)	(675)
Securities Held To Maturity, Greater than 12 Months, Fair Value	186,204	269,653
Securities Held To Maturity, Greater than 12 Months, Unrealized Losses	(4,064)	(7,567)
Securities Held To Maturity, Fair Value, Total	279,257	401,239
Securities Held To Maturity, Unrealized Losses, Total	$ (5,102)	$ (8,242)
Less than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities | Security	27	12
Greater than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities | Security	16	24
U.S. Government-Sponsored Entities [Member]
Schedule Of Securities [Line Items]
Number of available for sale securities, Less than 1 year | Security	3	7
Number of available for sale securities, Greater than 1 year | Security	3	7
Number of available for sale securities | Security	6	14
Securities Available For Sale, Less than 12 Months, Fair Value	$ 59,823	$ 89,986
Securities Available For Sale, Less than 12 Months, Unrealized Losses	(177)	(275)
Securities Available For Sale, 12 Months or More, Fair Value	37,867	99,326
Securities Available For Sale, 12 Months or More, Unrealized Losses	(128)	(1,664)
Securities Available For Sale, Fair Value, Total	97,690	189,312
Securities Available For Sale, Unrealized Losses, Total	$ (305)	$ (1,939)
Number of held to maturity securities | Security	1	4
Securities Held To Maturity, Less than 12 Months, Fair Value		$ 24,989
Securities Held To Maturity, Less than 12 Months, Unrealized Losses		(40)
Securities Held To Maturity, Greater than 12 Months, Fair Value	$ 14,921	29,516
Securities Held To Maturity, Greater than 12 Months, Unrealized Losses	(79)	(484)
Securities Held To Maturity, Fair Value, Total	14,921	54,505
Securities Held To Maturity, Unrealized Losses, Total	$ (79)	$ (524)
U.S. Government-Sponsored Entities [Member] | Less than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities | Security		2
U.S. Government-Sponsored Entities [Member] | Greater than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities | Security	1	2
Agency Mortgage-Backed Securities [Member]
Schedule Of Securities [Line Items]
Number of available for sale securities, Less than 1 year | Security	1	2
Number of available for sale securities | Security	1	2
Securities Available For Sale, Less than 12 Months, Fair Value	$ 18,591	$ 45,145
Securities Available For Sale, Less than 12 Months, Unrealized Losses	(82)	(35)
Securities Available For Sale, Fair Value, Total	18,591	45,145
Securities Available For Sale, Unrealized Losses, Total	$ (82)	$ (35)
Number of held to maturity securities | Security	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	$ 924	45,042
Securities Held To Maturity, Greater than 12 Months, Unrealized Losses	(16)	(345)
Securities Held To Maturity, Fair Value, Total	924	46,141
Securities Held To Maturity, Unrealized Losses, Total	$ (16)	$ (346)
Agency Mortgage-Backed Securities [Member] | Less than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities | Security		1
Agency Mortgage-Backed Securities [Member] | Greater than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities | Security	1	4
Agency Collateralized Mortgage Obligations [Member]
Schedule Of Securities [Line Items]
Number of available for sale securities, Less than 1 year | Security	4	9
Number of available for sale securities, Greater than 1 year | Security	18	16
Number of available for sale securities | Security	22	25
Securities Available For Sale, Less than 12 Months, Fair Value	$ 63,640	$ 166,908
Securities Available For Sale, Less than 12 Months, Unrealized Losses	(123)	(1,238)
Securities Available For Sale, 12 Months or More, Fair Value	228,010	225,700
Securities Available For Sale, 12 Months or More, Unrealized Losses	(4,825)	(7,809)
Securities Available For Sale, Fair Value, Total	291,650	392,608
Securities Available For Sale, Unrealized Losses, Total	$ (4,948)	$ (9,047)
Number of held to maturity securities | Security	17	22
Securities Held To Maturity, Less than 12 Months, Fair Value	$ 46,120	$ 104,071
Securities Held To Maturity, Less than 12 Months, Unrealized Losses	(212)	(630)
Securities Held To Maturity, Greater than 12 Months, Fair Value	170,359	189,642
Securities Held To Maturity, Greater than 12 Months, Unrealized Losses	(3,969)	(6,699)
Securities Held To Maturity, Fair Value, Total	216,479	293,713
Securities Held To Maturity, Unrealized Losses, Total	$ (4,181)	$ (7,329)
Agency Collateralized Mortgage Obligations [Member] | Less than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities | Security	3	8
Agency Collateralized Mortgage Obligations [Member] | Greater than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities | Security	14	14
Commercial Mortgage-Backed Securities [Member]
Schedule Of Securities [Line Items]
Number of available for sale securities, Less than 1 year | Security		1
Number of available for sale securities | Security		1
Securities Available For Sale, Less than 12 Months, Fair Value		$ 7,880
Securities Available For Sale, Less than 12 Months, Unrealized Losses		(11)
Securities Available For Sale, Fair Value, Total		7,880
Securities Available For Sale, Unrealized Losses, Total		$ (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 | Security		1
Number of available for sale securities | Security		1
Securities Available For Sale, 12 Months or More, Fair Value		$ 1,159
Securities Available For Sale, 12 Months or More, Unrealized Losses		(32)
Securities Available For Sale, Fair Value, Total		1,159
Securities Available For Sale, Unrealized Losses, Total		$ (32)
Number of held to maturity securities | Security	24	5
Securities Held To Maturity, Less than 12 Months, Fair Value	$ 46,933	$ 1,427
Securities Held To Maturity, Less than 12 Months, Unrealized Losses	(826)	(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	46,933	6,880
Securities Held To Maturity, Unrealized Losses, Total	$ (826)	$ (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 | Security	24	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 | Security		4
Other Securities [Member]
Schedule Of Securities [Line Items]
Number of available for sale securities, Greater than 1 year | Security	3	4
Number of available for sale securities | Security	3	4
Securities Available For Sale, 12 Months or More, Fair Value	$ 4,480	$ 6,030
Securities Available For Sale, 12 Months or More, Unrealized Losses	(414)	(857)
Securities Available For Sale, Fair Value, Total	4,480	6,030
Securities Available For Sale, Unrealized Losses, Total	$ (414)	$ (857)

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Stock Incentive Plans

9 Months Ended

Sep. 30, 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.

For the nine months ended September 30, 2015 and 2014, the Corporation issued 402,947 and 364,065 restricted stock awards, respectively, with aggregated grant date fair values of $5,302 and $4,954 under these plans. For performance-based restricted stock awards granted, 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 September 30, 2015, the Corporation had available up to 2,072,110 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 $3,287 and $2,294 for the nine months ended September 30, 2015 and 2014, the tax benefit of which was $1,150 and $803, respectively.

The following table summarizes certain information concerning restricted stock awards:

	Nine Months Ended September 30,
	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
Granted		402,947			13.16		364,065			13.61
Net adjustment due to performance		8,884			22.73		(87,512	)		11.41
Vested		(471,997	)		10.66		(703,428	)		8.79
Forfeited		(29,428	)		13.46		(50,849	)		11.47
Dividend reinvestment		30,551			11.32		34,521			12.73
Unvested awards outstanding at end of period		1,295,050			12.73		1,285,830			11.90

The total fair value of awards vested was $5,912 and $10,670 for the nine months ended September 30, 2015 and 2014, respectively.

As of September 30, 2015, there was $6,993 of unrecognized compensation cost related to unvested restricted stock awards, including $70 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 September 30, 2015 are as follows:

	Service- Based Awards		Performance- Based Awards		Total
Unvested awards		648,154		646,896		1,295,050
Unrecognized compensation expense	$	4,458	$	2,535	$	6,993
Intrinsic value	$	8,394	$	8,377	$	16,771
Weighted average remaining life (in years)		2.11		1.99		2.05

Stock Options

All outstanding stock options were assumed in connection with certain of the Corporation’s completed acquisitions and are fully vested. Upon consummation of those 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 88,899 and 99,284 for the nine months ended September 30, 2015 and 2014, respectively.

The following table summarizes certain information concerning stock option awards:

	Nine Months Ended September 30,
	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 acquisitions		—			—		805,507			7.39
Exercised		(88,899	)		5.61		(140,817	)		6.21
Forfeited		(2,182	)		4.34		(54,962	)		24.41
Options outstanding and exercisable at end of period		477,753			9.48		1,143,252			8.64

The intrinsic value of outstanding and exercisable stock options at September 30, 2015 was $1,522.

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, was sold at auction by the UST and 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, was sold at auction by the UST and was exercised at $5.81 per share during the second quarter of 2015.

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 374,221, with a resulting lower exercise price of $3.27 per share as of September 30, 2015. The warrant, which was recorded at its fair value on April 6, 2013, was sold at auction by the UST and expires in 2019.

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Cash Flow Information

9 Months Ended

Sep. 30, 2015

Supplemental Cash Flow Elements [Abstract]

Cash Flow Information

CASH FLOW INFORMATION

Following is a summary of supplemental cash flow information:

Nine Months Ended September 30	2015		2014
Interest paid on deposits and other borrowings	$	35,531	$	31,804
Income taxes paid		41,000		17,000
Transfers of loans to other real estate owned		6,901		7,784
Financing of other real estate owned sold		372		287

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Business Segments - Financial Information for Segments of Corporation (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Segment Reporting Information [Line Items]
Interest income	$ 137,197	$ 131,566	$ 406,014	$ 373,886
Interest expense	11,996	10,947	35,125	31,250
Net interest income	125,201	120,619	370,889	342,636
Provision for credit losses	10,777	11,197	27,777	28,608
Non-interest income	41,359	37,552	119,293	118,812
Non-interest expense	96,115	93,392	283,155	275,398
Intangible amortization	2,034	2,455	6,148	7,199
Income tax expense (benefit)	17,581	15,736	52,575	45,497
Net income (loss)	40,053	35,391	120,527	104,746
Total assets	16,836,073	15,757,045	16,836,073	15,757,045	$ 16,127,090
Total intangibles	880,558	879,288	880,558	879,288
Operating Segments [Member] | Community Banking [Member]
Segment Reporting Information [Line Items]
Interest income	125,281	120,122	371,366	339,974
Interest expense	10,473	9,435	30,580	26,413
Net interest income	114,808	110,687	340,786	313,561
Provision for credit losses	8,702	9,427	21,974	23,148
Non-interest income	29,667	27,179	85,281	86,512
Non-interest expense	80,906	79,243	236,324	231,390
Intangible amortization	1,824	2,282	5,601	6,680
Income tax expense (benefit)	15,804	14,347	48,744	41,738
Net income (loss)	37,239	32,567	113,424	97,117
Total assets	16,658,489	15,584,832	16,658,489	15,584,832
Total intangibles	855,164	856,464	855,164	856,464
Operating Segments [Member] | Wealth Management [Member]
Segment Reporting Information [Line Items]
Non-interest income	8,682	8,174	26,268	23,530
Non-interest expense	6,703	6,294	20,127	19,038
Intangible amortization	69	72	205	216
Income tax expense (benefit)	696	656	2,143	1,555
Net income (loss)	1,214	1,152	3,793	2,721
Total assets	21,099	21,892	21,099	21,892
Total intangibles	10,516	10,792	10,516	10,792
Operating Segments [Member] | Insurance [Member]
Segment Reporting Information [Line Items]
Interest income	22	24	67	74
Net interest income	22	24	67	74
Non-interest income	3,602	3,373	9,948	10,582
Non-interest expense	3,201	2,943	10,952	8,900
Intangible amortization	141	101	342	303
Income tax expense (benefit)	105	128	(433)	521
Net income (loss)	177	225	(846)	932
Total assets	22,201	19,148	22,201	19,148
Total intangibles	13,069	10,223	13,069	10,223
Operating Segments [Member] | Consumer Finance [Member]
Segment Reporting Information [Line Items]
Interest income	10,096	9,773	29,467	28,716
Interest expense	878	826	2,593	2,481
Net interest income	9,218	8,947	26,874	26,235
Provision for credit losses	1,750	1,519	5,288	4,754
Non-interest income	716	719	2,124	2,120
Non-interest expense	4,983	4,983	14,785	14,800
Income tax expense (benefit)	1,473	1,216	3,660	3,386
Net income (loss)	1,728	1,948	5,265	5,415
Total assets	187,721	182,301	187,721	182,301
Total intangibles	1,809	1,809	1,809	1,809
Parent and Other [Member]
Segment Reporting Information [Line Items]
Interest income	1,798	1,647	5,114	5,122
Interest expense	645	686	1,952	2,356
Net interest income	1,153	961	3,162	2,766
Provision for credit losses	325	251	515	706
Non-interest income	(1,308)	(1,893)	(4,328)	(3,932)
Non-interest expense	322	(71)	967	1,270
Income tax expense (benefit)	(497)	(611)	(1,539)	(1,703)
Net income (loss)	(305)	(501)	(1,109)	(1,439)
Total assets	$ (53,437)	$ (51,128)	$ (53,437)	$ (51,128)

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Securities - Additional Information (Detail) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2015 USD ($) Security	Sep. 30, 2014 USD ($)	Mar. 31, 2014 USD ($) Securities	Sep. 30, 2015 USD ($) Security	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Schedule Of Securities [Line Items]
Number of pooled issue securities | Securities			23
Net proceeds from sale of securities				$ 33,499	$ 175,872
Net securities (losses) gains	$ 314	$ 1,178		319	11,415
Securities pledged to secure public deposits, trust deposits and for other purposes, carrying value	2,062,257			2,062,257		$ 1,036,380
Securities pledged as collateral for short-term borrowings, carrying value	$ 258,428			$ 258,428		$ 892,647
Number of single-issuer securities | Security	3			3
Estimated fair value of single-issue trust preferred securities	$ 4,480			$ 4,480
Amortized cost of single-issue trust preferred securities	4,894			4,894
Impairment losses on securities				0	$ 0
Municipal bond portfolio, value	$ 238,733			$ 238,733
Municipal Bonds [Member]
Schedule Of Securities [Line Items]
Percentage of formal credit enhancement insurance of municipalities	83.00%			83.00%
Municipal Bonds [Member] | Weighted Average [Member]
Schedule Of Securities [Line Items]
Average holding size of securities in bond portfolio				$ 1,492
Municipal Bonds [Member] | Credit Concentration Risk [Member] | General Obligation Bonds [Member]
Schedule Of Securities [Line Items]
Percentage of portfolio				99.80%
Municipal Bonds [Member] | Credit Concentration Risk [Member] | General Obligation Bonds [Member] | A Rating [Member] | Minimum [Member]
Schedule Of Securities [Line Items]
Percentage of portfolio				99.00%
Municipal Bonds [Member] | Geographic Concentration Risk [Member] | Pennsylvania, Ohio and Maryland [Member]
Schedule Of Securities [Line Items]
Percentage of portfolio				93.60%
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			$ (3,529)

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Business Segments (Tables)

9 Months Ended

Sep. 30, 2015

Segment Reporting [Abstract]

Financial Information for Segments of Corporation

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, international banking, business credit, 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 September 30, 2015
Interest income	$	125,281	$	—	$	22		$	10,096	$	1,798		$	137,197
Interest expense		10,473		—		—			878		645			11,996
Net interest income		114,808		—		22			9,218		1,153			125,201
Provision for credit losses		8,702		—		—			1,750		325			10,777
Non-interest income		29,667		8,682		3,602			716		(1,308	)		41,359
Non-interest expense		80,906		6,703		3,201			4,983		322			96,115
Intangible amortization		1,824		69		141			—		—			2,034
Income tax expense (benefit)		15,804		696		105			1,473		(497	)		17,581
Net income (loss)		37,239		1,214		177			1,728		(305	)		40,053
Total assets		16,658,489		21,099		22,201			187,721		(53,437	)		16,836,073
Total intangibles		855,164		10,516		13,069			1,809		—			880,558
At or for the Three Months Ended September 30, 2014
Interest income	$	120,122	$	—	$	24		$	9,773	$	1,647		$	131,566
Interest expense		9,435		—		—			826		686			10,947
Net interest income		110,687		—		24			8,947		961			120,619
Provision for credit losses		9,427		—		—			1,519		251			11,197
Non-interest income		27,179		8,174		3,373			719		(1,893	)		37,552
Non-interest expense		79,243		6,294		2,943			4,983		(71	)		93,392
Intangible amortization		2,282		72		101			—		—			2,455
Income tax expense (benefit)		14,347		656		128			1,216		(611	)		15,736
Net income (loss)		32,567		1,152		225			1,948		(501	)		35,391
Total assets		15,584,832		21,892		19,148			182,301		(51,128	)		15,757,045
Total intangibles		856,464		10,792		10,223			1,809		—			879,288
At or for the Nine Months Ended September 30, 2015
Interest income	$	371,366	$	—	$	67		$	29,467	$	5,114		$	406,014
Interest expense		30,580		—		—			2,593		1,952			35,125
Net interest income		340,786		—		67			26,874		3,162			370,889
Provision for credit losses		21,974		—		—			5,288		515			27,777
Non-interest income		85,281		26,268		9,948			2,124		(4,328	)		119,293
Non-interest expense		236,324		20,127		10,952			14,785		967			283,155
Intangible amortization		5,601		205		342			—		—			6,148
Income tax expense (benefit)		48,744		2,143		(433	)		3,660		(1,539	)		52,575
Net income (loss)		113,424		3,793		(846	)		5,265		(1,109	)		120,527
Total assets		16,658,489		21,099		22,201			187,721		(53,437	)		16,836,073
Total intangibles		855,164		10,516		13,069			1,809		—			880,558
At or for the Nine Months Ended September 30, 2014
Interest income	$	339,974	$	—	$	74		$	28,716	$	5,122		$	373,886
Interest expense		26,413		—		—			2,481		2,356			31,250
Net interest income		313,561		—		74			26,235		2,766			342,636
Provision for credit losses		23,148		—		—			4,754		706			28,608
Non-interest income		86,512		23,530		10,582			2,120		(3,932	)		118,812
Non-interest expense		231,390		19,038		8,900			14,800		1,270			275,398
Intangible amortization		6,680		216		303			—		—			7,199
Income tax expense (benefit)		41,738		1,555		521			3,386		(1,703	)		45,497
Net income (loss)		97,117		2,721		932			5,415		(1,439	)		104,746
Total assets		15,584,832		21,892		19,148			182,301		(51,128	)		15,757,045
Total intangibles		856,454		10,792		10,223			1,809		—			879,288

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Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	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	121,219				104,746	16,473
Dividends declared:
Preferred stock	(6,342)				(6,342)
Common stock: $0.36/share	(60,234)				(60,234)
Issuance of common stock	1,418		16	9,007	(228)		(7,377)
Issuance of common stock - acquisitions	170,163		139	170,024
Restricted stock compensation	2,328			2,328
Tax benefit of stock-based compensation	2,198			2,198
Balance at Sep. 30, 2014	2,005,133	106,882	1,747	1,791,674	159,812	(40,451)	(14,531)
Balance at Dec. 31, 2014	2,021,456	106,882	1,754	1,798,984	176,120	(46,003)	(16,281)
Comprehensive income	132,133				120,527	11,606
Dividends declared:
Preferred stock	(6,030)				(6,030)
Common stock: $0.36/share	(63,330)				(63,330)
Issuance of common stock	7,229		12	3,651			3,566
Restricted stock compensation	3,286			3,286
Tax benefit of stock-based compensation	5			5
Balance at Sep. 30, 2015	$ 2,094,749	$ 106,882	$ 1,766	$ 1,805,926	$ 227,287	$ (34,397)	$ (12,715)

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Comprehensive Income - Components of Comprehensive Income, Net of Related Tax (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Components Of Comprehensive Income [Abstract]
Net income	$ 40,053	$ 35,391	$ 120,527	$ 104,746
Securities available for sale, Unrealized gains (losses) arising during the period, net of tax expense (benefit) of $3,649, $(1,551), $4,302 and $10,399	6,777	(2,881)	7,989	19,312
Securities available for sale, Reclassification adjustment for gains included in net income, net of tax expense of $110, $412, $112 and $3,995	(204)	(766)	(207)	(7,420)
Unrealized gains on derivative instruments arising during the period, net of tax expense of $1,709, $40, $2,353 and $2,979	3,174	74	4,370	5,532
Reclassification adjustment on derivative instruments for gains included in net income, net of tax expense of $286, $293, $854 and $867	(531)	(543)	(1,586)	(1,610)
Unrealized gains on pension and postretirement benefit obligations arising during the period, net of tax expense of $183, $121, $560 and $355	340	224	1,040	659
Other comprehensive income (loss)	9,556	(3,892)	11,606	16,473
Comprehensive income	$ 49,609	$ 31,499	$ 132,133	$ 121,219

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Use of Estimates

9 Months Ended

Sep. 30, 2015

Organization, Consolidation and Presentation of Financial Statements [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.

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Loans and Leases - Summary of Non-Performing Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled debt restructurings	$ 43,713	$ 41,152
Non-Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	47,298	45,113
Troubled debt restructurings	21,221	23,439
Total non-performing loans	68,519	68,552
Other real estate owned (OREO)	38,931	41,466
Total non-performing assets	$ 107,450	$ 110,018
Non-performing loans as a percent of total loans and leases	0.58%	0.61%
Non-performing loans + OREO as a percent of total loans and leases + OREO	0.90%	0.97%
Non-performing assets as a percent of total assets	0.64%	0.68%

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Stock Incentive Plans - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Jun. 30, 2015	Apr. 06, 2013	Jan. 01, 2012	Jun. 16, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards issued	402,947	364,065
Aggregate, weighted average grant date fair value	$ 5,302	$ 4,954
Common stock shares available under incentive compensation plans	2,072,110
Unrecognized compensation expense	$ 6,993
Stock options exercised	88,899	140,817
Intrinsic value of outstanding and exercisable stock options	$ 1,522
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	$ 3.27
Warrant issued	342,564
Warrants converted to purchase common stock	374,221
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense related to restricted stock awards	$ 3,287	$ 2,294
Tax benefit related to restricted stock awards	1,150	803
Total fair value of awards vested	5,912	$ 10,670
Unrecognized compensation expense	6,993
Amount subject to accelerated vesting under Incentive Compensation Plan	$ 70
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options exercised	88,899	99,284
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 expense	$ 4,458
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 expense	$ 2,535
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%

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Borrowings - Summary of Short-Term Borrowings (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Debt Disclosure [Abstract]
Securities sold under repurchase agreements	$ 256,320	$ 882,696
Federal Home Loan Bank advances	450,000	820,000
Federal funds purchased	456,000	210,000
Subordinated notes	124,982	128,962
Short-term borrowings	$ 1,287,302	$ 2,041,658

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Business Segments

9 Months Ended

Sep. 30, 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, international banking, business credit, 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 September 30, 2015
Interest income	$	125,281	$	—	$	22		$	10,096	$	1,798		$	137,197
Interest expense		10,473		—		—			878		645			11,996
Net interest income		114,808		—		22			9,218		1,153			125,201
Provision for credit losses		8,702		—		—			1,750		325			10,777
Non-interest income		29,667		8,682		3,602			716		(1,308	)		41,359
Non-interest expense		80,906		6,703		3,201			4,983		322			96,115
Intangible amortization		1,824		69		141			—		—			2,034
Income tax expense (benefit)		15,804		696		105			1,473		(497	)		17,581
Net income (loss)		37,239		1,214		177			1,728		(305	)		40,053
Total assets		16,658,489		21,099		22,201			187,721		(53,437	)		16,836,073
Total intangibles		855,164		10,516		13,069			1,809		—			880,558
At or for the Three Months Ended September 30, 2014
Interest income	$	120,122	$	—	$	24		$	9,773	$	1,647		$	131,566
Interest expense		9,435		—		—			826		686			10,947
Net interest income		110,687		—		24			8,947		961			120,619
Provision for credit losses		9,427		—		—			1,519		251			11,197
Non-interest income		27,179		8,174		3,373			719		(1,893	)		37,552
Non-interest expense		79,243		6,294		2,943			4,983		(71	)		93,392
Intangible amortization		2,282		72		101			—		—			2,455
Income tax expense (benefit)		14,347		656		128			1,216		(611	)		15,736
Net income (loss)		32,567		1,152		225			1,948		(501	)		35,391
Total assets		15,584,832		21,892		19,148			182,301		(51,128	)		15,757,045
Total intangibles		856,464		10,792		10,223			1,809		—			879,288
At or for the Nine Months Ended September 30, 2015
Interest income	$	371,366	$	—	$	67		$	29,467	$	5,114		$	406,014
Interest expense		30,580		—		—			2,593		1,952			35,125
Net interest income		340,786		—		67			26,874		3,162			370,889
Provision for credit losses		21,974		—		—			5,288		515			27,777
Non-interest income		85,281		26,268		9,948			2,124		(4,328	)		119,293
Non-interest expense		236,324		20,127		10,952			14,785		967			283,155
Intangible amortization		5,601		205		342			—		—			6,148
Income tax expense (benefit)		48,744		2,143		(433	)		3,660		(1,539	)		52,575
Net income (loss)		113,424		3,793		(846	)		5,265		(1,109	)		120,527
Total assets		16,658,489		21,099		22,201			187,721		(53,437	)		16,836,073
Total intangibles		855,164		10,516		13,069			1,809		—			880,558
At or for the Nine Months Ended September 30, 2014
Interest income	$	339,974	$	—	$	74		$	28,716	$	5,122		$	373,886
Interest expense		26,413		—		—			2,481		2,356			31,250
Net interest income		313,561		—		74			26,235		2,766			342,636
Provision for credit losses		23,148		—		—			4,754		706			28,608
Non-interest income		86,512		23,530		10,582			2,120		(3,932	)		118,812
Non-interest expense		231,390		19,038		8,900			14,800		1,270			275,398
Intangible amortization		6,680		216		303			—		—			7,199
Income tax expense (benefit)		41,738		1,555		521			3,386		(1,703	)		45,497
Net income (loss)		97,117		2,721		932			5,415		(1,439	)		104,746
Total assets		15,584,832		21,892		19,148			182,301		(51,128	)		15,757,045
Total intangibles		856,454		10,792		10,223			1,809		—			879,288

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Derivative and Hedging Activities - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Derivative [Line Items]
Notional amount	$ 2,751,532		$ 2,215,056
Derivative assets	66,293		45,898
Derivative liabilities	62,806		46,160
Amounts reclassified from AOCI	(1,793)
Additional amount in excess of posted collateral required in case of breached agreements	1,816		1,862
Interest Rate Contracts [Member]
Derivative [Line Items]
Notional amount	$ 250,000		200,000
Period to reclassification of cash flow hedge gain loss	12 months
Maximum length of time hedged in interest rate cash flow hedge	8 years
Derivative gains to be reclassified within twelve months	$ 2,219
Derivative gains to be reclassified within twelve months, net of tax	1,443
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] | Interest Income - Loans and Leases [Member]
Derivative [Line Items]
Derivative financial instrument, net	2,440	$ 2,479
Interest Rate Contracts [Member] | Interest Income - Loans and Leases [Member] | Amount Reclassified from Other Comprehensive Income [Member]
Derivative [Line Items]
Derivative financial instrument, net	2,440
Amounts reclassified from AOCI	1,586
Interest Rate Contracts [Member] | Interest Expense - Short-term Borrowings [Member]
Derivative [Line Items]
Derivative financial instrument, net	115
Interest Rate Contracts [Member] | Interest Expense - Short-term Borrowings [Member] | Amount Reclassified from Other Comprehensive Income [Member]
Derivative [Line Items]
Derivative financial instrument, net	115
Amounts reclassified from AOCI	75
Interest Rate Swap [Member]
Derivative [Line Items]
Notional amount	1,193,598		972,002
Credit Risk Contract Sold [Member]
Derivative [Line Items]
Notional amount	$ 74,010
Risk participation agreements, minimum term	2 years
Risk participation agreements, maximum term	9 years
Maximum exposure under credit risk agreement assuming customer default	$ 185		25
Trading Assets [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative assets	61,349		43,742
Not for Trading Assets [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Derivative assets	4,918		2,109
Trading Liabilities [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative liabilities	61,754		43,783
Not for Trading Liabilities [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Derivative liabilities	$ 855		$ 2,330

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Comprehensive Income (Tables)

9 Months Ended

Sep. 30, 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						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Net income	$	40,053		$	35,391		$	120,527		$	104,746
Other comprehensive income (loss):
Securities available for sale:
Unrealized gains (losses) arising during the period, net of tax expense (benefit) of $3,649, $(1,551), $4,302 and $10,399		6,777			(2,881	)		7,989			19,312
Reclassification adjustment for gains included in net income, net of tax expense of $110, $412, $112 and $3,995		(204	)		(766	)		(207	)		(7,420	)
Derivative instruments:
Unrealized gains arising during the period, net of tax expense of $1,709, $40, $2,353 and $2,979		3,174			74			4,370			5,532
Reclassification adjustment for gains included in net income, net of tax expense of $286, $293, $854 and $867		(531	)		(543	)		(1,586	)		(1,610	)
Pension and postretirement benefit obligations:
Unrealized gains arising during the period, net of tax expense of $183, $121, $560 and $355		340			224			1,040			659
Other comprehensive income (loss)		9,556			(3,892	)		11,606			16,473
Comprehensive income	$	49,609		$	31,499		$	132,133		$	121,219

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
Nine Months Ended September 30, 2015
Balance at beginning of period	$	(440	)	$	(143	)	$	(45,420	)	$	(46,003	)
Other comprehensive income before reclassifications		7,989			4,370			1,040			13,399
Amounts reclassified from AOCI		(207	)		(1,586	)		—			(1,793	)
Net current period other comprehensive income		7,782			2,784			1,040			11,606
Balance at end of period	$	7,342		$	2,641		$	(44,380	)	$	(34,397	)

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Commitments, Credit Risk and Contingencies

9 Months Ended

Sep. 30, 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:

	September 30, 2015		December 31, 2014
Commitments to extend credit	$	3,527,479	$	3,665,481
Standby letters of credit		97,875		121,186

At September 30, 2015, funding of 75.3% 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.

In addition, debt issued by FNB Financial Services, LP, a wholly-owned finance subsidiary, is fully and unconditionally guaranteed by the Corporation.

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.