F.N.B. (FNB) 10-Q 9 May 14 2014 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2014	Apr. 30, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	31-Mar-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q1	'
Trading Symbol	'FNB	'
Entity Registrant Name	'FNB CORP/FL/	'
Entity Central Index Key	'0000037808	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	166,426,974

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Assets	'	'
Cash and due from banks	$221,615	$197,534
Interest bearing deposits with banks	24,638	16,447
Cash and Cash Equivalents	246,253	213,981
Securities available for sale	1,274,070	1,141,650
Securities held to maturity (fair value of $1,418,994 and $1,189,563)	1,420,446	1,199,169
Residential mortgage loans held for sale	3,940	7,138
Loans, net of unearned income of $52,625 and $55,051	9,943,136	9,506,094
Allowance for loan losses	-112,219	-110,784
Net Loans	9,830,917	9,395,310
Premises and equipment, net	165,603	154,032
Goodwill	805,788	764,248
Core deposit and other intangible assets, net	51,024	47,608
Bank owned life insurance	307,872	289,402
Other assets	370,597	350,867
Total Assets	14,476,510	13,563,405
Liabilities	'	'
Non-interest bearing demand	2,353,444	2,200,081
Interest bearing demand	4,238,715	3,968,679
Savings	1,569,090	1,423,399
Certificates and other time deposits	2,777,487	2,606,073
Total Deposits	10,938,736	10,198,232
Other liabilities	131,894	130,418
Short-term borrowings	1,216,624	1,241,239
Long-term debt	235,752	143,928
Junior subordinated debt	68,517	75,205
Total Liabilities	12,591,523	11,789,022
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 - 167,377,712 and 159,624,796 shares	1,671	1,592
Additional paid-in capital	1,697,177	1,608,117
Retained earnings	133,828	121,870
Accumulated other comprehensive loss	-44,041	-56,924
Treasury stock - 1,000,385 and 657,585 shares at cost	-10,530	-7,154
Total Stockholders' Equity	1,884,987	1,774,383
Total Liabilities and Stockholders' Equity	$14,476,510	$13,563,405

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Statement Of Financial Position [Abstract]	'	'
Securities held to maturity, fair value	$1,418,994	$1,189,563
Unearned income on loans	$52,625	$55,051
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	167,377,712	159,624,796
Treasury stock, shares	1,000,385	657,585

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (Unaudited) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Interest Income	'	'
Loans, including fees	$104,097	$92,975
Securities:	'	'
Taxable	12,287	10,597
Nontaxable	1,291	1,516
Dividends	179	16
Other	26	14
Total Interest Income	117,880	105,118
Interest Expense	'	'
Deposits	7,149	8,265
Short-term borrowings	1,194	1,107
Long-term debt	1,071	774
Junior subordinated debt	641	1,876
Total Interest Expense	10,055	12,022
Net Interest Income	107,825	93,096
Provision for loan losses	7,006	7,541
Net Interest Income After Provision for Loan Losses	100,819	85,555
Non-Interest Income	'	'
Service charges	15,288	16,425
Trust fees	4,764	4,085
Insurance commissions and fees	4,945	4,430
Securities commissions and fees	2,372	2,923
Net securities gains	9,461	684
Mortgage banking	214	1,084
Bank owned life insurance	2,185	1,636
Other	2,841	2,345
Total Non-Interest Income	42,070	33,612
Non-Interest Expense	'	'
Salaries and employee benefits	48,953	43,905
Net occupancy	8,482	6,698
Equipment	6,899	5,492
Amortization of intangibles	2,283	1,925
Outside services	7,237	7,205
FDIC insurance	2,994	2,364
Merger related	5,318	352
Other	12,000	10,861
Total Non-Interest Expense	94,166	78,802
Income Before Income Taxes	48,723	40,365
Income taxes	14,199	11,827
Net Income	34,524	28,538
Preferred stock dividends	2,322	'
Net Income Available to Common Stockholders	32,202	28,538
Net Income per Common Share - Basic	$0.20	$0.20
Net Income per Common Share - Diluted	$0.20	$0.20
Cash Dividends per Common Share	$0.12	$0.12
Comprehensive Income	$47,407	$27,564

Consolidated_Statement_of_Stoc

Consolidated Statement of Stockholders' Equity (Unaudited) (USD $)	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]
In Thousands, unless otherwise specified
Balance at Dec. 31, 2012	$1,402,069	'	$1,398	$1,376,601	$75,312	($46,224)	($5,018)
Net income	28,538	'	'	'	28,538	'	'
Change in other comprehensive income (loss), net of tax	-974	'	'	'	'	-974	'
Dividends declared:	'	'	'	'	'	'	'
Preferred stock	'	'	'	'	'	'	'
Common stock: $0.12/share	-16,927	'	'	'	-16,927	'	'
Issuance of common stock	-1,779	'	8	155	'	'	-1,942
Restricted stock compensation	1,083	'	'	1,083	'	'	'
Tax benefit of stock-based compensation	1,247	'	'	1,247	'	'	'
Balance at Mar. 31, 2013	1,413,257	'	1,406	1,379,086	86,923	-47,198	-6,960
Balance at Dec. 31, 2013	1,774,383	106,882	1,592	1,608,117	121,870	-56,924	-7,154
Net income	34,524	'	'	'	34,524	'	'
Change in other comprehensive income (loss), net of tax	12,883	'	'	'	'	12,883	'
Dividends declared:	'	'	'	'	'	'	'
Preferred stock	-2,322	'	'	'	-2,322	'	'
Common stock: $0.12/share	-20,016	'	'	'	-20,016	'	'
Issuance of common stock	2,347	'	12	5,939	-228	'	-3,376
Issuance of common stock - acquisitions	81,397	'	67	81,330	'	'	'
Restricted stock compensation	567	'	'	567	'	'	'
Tax benefit of stock-based compensation	1,224	'	'	1,224	'	'	'
Balance at Mar. 31, 2014	$1,884,987	$106,882	$1,671	$1,697,177	$133,828	($44,041)	($10,530)

Consolidated_Statement_of_Stoc1

Consolidated Statement of Stockholders' Equity (Unaudited) (Parenthetical) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Statement Of Stockholders Equity [Abstract]	'	'
Common stock dividends per share	$0.12	$0.12

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (Unaudited) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Operating Activities	'	'
Net income	$34,524	$28,538
Adjustments to reconcile net income to net cash flows provided by operating activities:	'	'
Depreciation, amortization and accretion	8,339	8,181
Provision for loan losses	7,006	7,541
Deferred tax expenses	-2,154	6,057
Net securities gains	-9,461	-684
Tax benefit of stock-based compensation	-1,224	-1,247
Loans originated for sale	-18,245	-65,340
Loans sold	22,635	68,241
Gain on sale of loans	-1,193	-1,021
Net change in:	'	'
Interest receivable	-123	-1,971
Interest payable	-750	-1,467
Trading securities	203,178	'
Bank owned life insurance	-1,513	-1,675
Other, net	3,096	-18,176
Net cash flows provided by operating activities	244,115	26,977
Investing Activities	'	'
Net change in loans	-140,938	-80,520
Securities available for sale:	'	'
Purchases	-318,332	-92,521
Sales	85,877	21,919
Maturities	130,641	77,002
Securities held to maturity:	'	'
Purchases	-266,486	-113,176
Sales	'	17,429
Maturities	44,159	90,826
Purchase of bank owned life insurance	-4,433	-5,000
Withdrawal/surrender of bank owned life insurance	716	'
(Increase) decrease in premises and equipment	-6,042	1,783
Net cash received in business combinations	26,964	'
Net cash flows used in investing activities	-447,874	-82,258
Financing Activities	'	'
Demand (non-interest bearing and interest bearing) and savings accounts	253,935	220,825
Time deposits	-44,043	-90,793
Short-term borrowings	-24,615	-138,137
Increase in long-term debt	108,079	13,331
Decrease in long-term debt	-16,254	-11,017
Decrease in junior subordinated debt	-23,712	'
Net proceeds from issuance of common stock	3,755	-696
Tax benefit of stock-based compensation	1,224	1,247
Cash dividends paid:	'	'
Preferred stock	-2,322	'
Common stock	-20,016	-16,927
Net cash flows provided by (used in) financing activities	236,031	-22,167
Net Decrease (Increase) in Cash and Cash Equivalents	32,272	-77,448
Cash and cash equivalents at beginning of period	213,981	239,044
Cash and Cash Equivalents at End of Period	$246,253	$161,596

BUSINESS

BUSINESS	3 Months Ended
	Mar. 31, 2014
Accounting Policies [Abstract]	'
BUSINESS	'
	BUSINESS
	F.N.B. Corporation (the Corporation), headquartered in Hermitage, Pennsylvania, is a regional diversified financial services company operating in six states and three major metropolitan areas, including Pittsburgh, Pennsylvania, Baltimore, Maryland and Cleveland, Ohio. As of March 31, 2014, the Corporation had 283 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, 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. Wealth management services include asset management, private banking and insurance. The Corporation also operates Regency Finance Company (Regency), which had 72 consumer finance offices in Pennsylvania, Ohio, Kentucky and Tennessee as of March 31, 2014.

BASIS_OF_PRESENTATION

BASIS OF PRESENTATION	3 Months Ended
	Mar. 31, 2014
Accounting Policies [Abstract]	'
BASIS OF PRESENTATION	'
	BASIS OF PRESENTATION
	The Corporation’s accompanying consolidated financial statements and these notes to the financial statements include subsidiaries in which the Corporation has a controlling financial interest. The Corporation owns and operates FNBPA, First National Trust Company, First National Investment Services Company, LLC, F.N.B. Investment Advisors, Inc., First National Insurance Agency, LLC, Regency, F.N.B. Capital Corporation, LLC and Bank Capital Services, 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 28, 2014.

USE_OF_ESTIMATES

USE OF ESTIMATES	3 Months Ended
	Mar. 31, 2014
Text Block [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 loan losses, securities valuations, goodwill and other intangible assets and income taxes.

SECURITIES_OFFERINGS

SECURITIES OFFERINGS	3 Months Ended
	Mar. 31, 2014
Equity [Abstract]	'
SECURITIES OFFERINGS	'
	SECURITIES OFFERINGS
	On November 1, 2013, the Corporation completed a public offering of 4,693,876 shares of common stock at a price of $12.25 per share, including 612,244 shares of common stock purchased by the underwriters pursuant to an over-allotment option, which the underwriters exercised in full. On November 1, 2013, the Corporation also completed a public offering of 4,000,000 Depositary Shares, each representing a 1/40th interest in the Non-Cumulative Perpetual Preferred Stock, Series E, of the Corporation, at a price of $25.00 per share. On November 14, 2013, the underwriters exercised their over-allotment option of 435,080 additional Depositary Shares at the same terms. The net proceeds of the common and preferred stock offerings after deducting underwriting discounts and commissions and offering expenses were $54,434 and $106,882, respectively.

MERGERS_AND_ACQUISITIONS

MERGERS AND ACQUISITIONS	3 Months Ended
	Mar. 31, 2014
Business Combinations [Abstract]	'
MERGERS AND ACQUISITIONS	'
	MERGERS AND ACQUISITIONS
	OBA Financial Services, Inc.
	On April 8, 2014, the Corporation announced the signing of a definitive merger agreement to acquire OBA Financial Services, Inc. (OBA), a bank holding company with approximately $390,000 in total assets based in Germantown, Maryland. The transaction is valued at approximately $94,000. Under the terms of the merger agreement, OBA shareholders will be entitled to receive 1.781 shares of the Corporation’s common stock for each share of OBA common stock. OBA’s banking affiliate, OBA Bank, will be merged into FNBPA. The transaction is expected to be completed in the third quarter of 2014, pending regulatory approvals, the approval of shareholders of OBA and the satisfaction of other closing conditions.
	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 $596,795 in assets, $308,389 in loans and $532,197 in deposits. The acquisition was valued at approximately $80,554 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 preliminary estimated 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 a preliminary purchase price allocation, the Corporation recorded $42,292 in goodwill and $6,591 in core deposit intangibles as a result of the acquisition. These fair value estimates are provisional amounts based on third party valuations that are currently under review. None of the goodwill is deductible for income tax purposes.
	PVF Capital Corp.
	On October 12, 2013, the Corporation completed its acquisition of PVF Capital Corp. (PVF), a savings and loan holding company based in Solon, Ohio. On the acquisition date, the estimated fair values of PVF included $686,401 in assets, $512,566 in loans and $627,046 in deposits. The acquisition was valued at $109,856 and resulted in the Corporation issuing 8,893,598 shares of its common stock in exchange for 26,119,398 shares of PVF common stock. The Corporation also acquired the outstanding stock options of PVF that became fully vested upon the acquisition. The assets and liabilities of PVF were recorded on the Corporation’s consolidated balance sheets at their preliminary estimated fair values as of October 12, 2013, the acquisition date, and PVF’s results of operations have been included in the Corporation’s consolidated statements of comprehensive income since that date. PVF’s banking affiliate, Park View Federal Savings Bank, was merged into FNBPA on October 12, 2013. Based on a preliminary purchase price allocation, the Corporation recorded $52,085 in goodwill and $6,867 in core deposit intangibles as a result of the acquisition. These fair value estimates are provisional amounts based on third party valuations that are currently under review. None of the goodwill is deductible for income tax purposes.
	Annapolis Bancorp, Inc.
	On April 6, 2013, the Corporation completed its acquisition of Annapolis Bancorp, Inc. (ANNB), a bank holding company based in Annapolis, Maryland. On the acquisition date, the estimated fair values of ANNB included $394,363 in assets, $256,199 in loans and $349,370 in deposits. The acquisition was valued at $56,300 and resulted in the Corporation issuing 4,641,412 shares of its common stock in exchange for 4,060,802 shares of ANNB common stock. The Corporation also acquired the outstanding stock options of ANNB that became fully vested upon the acquisition. Additionally, the Corporation paid $609, or $0.15 per share, to the holders of ANNB common stock as cash consideration due to the collection of a certain loan, as designated in the merger agreement. The assets and liabilities of ANNB were recorded on the Corporation’s consolidated balance sheets at their preliminary estimated fair values as of April 6, 2013, the acquisition date, and ANNB’s results of operations have been included in the Corporation’s consolidated statements of comprehensive income since that date. ANNB’s banking affiliate, BankAnnapolis, was merged into FNBPA on April 6, 2013. In conjunction with the acquisition, a warrant issued by ANNB to the U.S. Department of the Treasury (UST) under the Capital Purchase Program (CPP) was assumed by the Corporation and converted into a warrant to purchase up to 342,564 shares of the Corporation’s common stock. The warrant expires January 30, 2019 and has an exercise price of $3.57 per share. Based on the purchase price allocation, the Corporation recorded $35,854 in goodwill and $3,775 in core deposit intangibles as a result of the acquisition. None of the goodwill is deductible for income tax purposes.

NEW_ACCOUNTING_STANDARDS

NEW ACCOUNTING STANDARDS	3 Months Ended
	Mar. 31, 2014
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]	'
NEW ACCOUNTING STANDARDS	'
	NEW ACCOUNTING STANDARDS
	Troubled Debt Restructurings
	In January 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2014-04, Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure, to clarify when an in-substance repossession or foreclosure occurs; that is, when a creditor should be considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan such that the loan should be derecognized and other real estate owned (OREO) recognized. This update requires a creditor to reclassify a collateralized consumer mortgage loan to OREO upon obtaining legal title to the real estate collateral, or the borrower voluntarily conveying all interest in the real estate property to the lender to satisfy the loan through a deed in lieu of foreclosure or similar legal agreement. The requirements of ASU 2014-04 are effective for reporting periods beginning after December 15, 2014. The adoption of this update will not have an impact on the financial statements, results of operations or liquidity of the Corporation since the Corporation already accounts for foreclosures according to the requirements of this update.
	Investments in Qualified Affordable Housing Projects
	In January 2014, the FASB issued ASU No. 2014-01, Accounting for Investments in Qualified Affordable Housing Projects, to revise the accounting for investments in qualified affordable housing projects. This update modifies the conditions that must be met to present the pretax effects and related tax benefits of such investments as a component of income taxes (“net” within income tax expense). It is expected that the new guidance will enable more investors to use a “net” presentation for investments in qualified affordable housing projects. Investors that do not qualify for “net” presentation under the new guidance will continue to account for such investments under the equity method or cost method, which results in losses recognized in pretax income and tax benefits recognized in income taxes (“gross” presentation of investment results). For investments that qualify for the “net” presentation of investment performance, the guidance introduces a “proportional amortization method” that can be elected to amortize the investment basis. If elected, the method is required for all eligible investments in qualified affordable housing projects. The requirements of ASU 2014-01 are effective for reporting periods beginning after December 15, 2014, 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.
	Income Taxes
	In July 2013, the FASB issued ASU No. 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists, to provide guidance on the financial statement presentation of certain unrecognized tax benefits. An unrecognized tax benefit or a portion of an unrecognized tax benefit should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss or a tax credit carryforward with certain exceptions related to availability. The requirements of ASU 2013-11 are effective prospectively for reporting periods beginning after December 15, 2013, with early adoption permitted. The adoption of this update did not have a material effect on the financial statements, results of operations or liquidity of the Corporation.

SECURITIES

SECURITIES	3 Months Ended
	Mar. 31, 2014
Text Block [Abstract]	'
SECURITIES	'
	SECURITIES
	The amortized cost and fair value of securities are as follows:
		Amortized			Gross			Gross			Fair Value
		Cost			Unrealized			Unrealized
					Gains			Losses
	Securities Available for Sale:
	March 31, 2014
	U.S. government-sponsored entities	$	268,330		$	50		$	(3,699	)	$	264,681
	Residential mortgage-backed securities:
	Agency mortgage-backed securities		352,209			4,637			(905	)		355,941
	Agency collateralized mortgage obligations		622,060			1,335			(13,643	)		609,752
	Non-agency collateralized mortgage obligations		1,661			18			—			1,679
	Commercial mortgage-backed securities		9,153			—			(24	)		9,129
	States of the U.S. and political subdivisions		14,216			438			(149	)		14,505
	Other debt securities		16,532			569			(861	)		16,240
	Total debt securities		1,284,161			7,047			(19,281	)		1,271,927
	Equity securities		1,444			699			—			2,143
		$	1,285,605		$	7,746		$	(19,281	)	$	1,274,070
	December 31, 2013
	U.S. government-sponsored entities	$	336,763		$	126		$	(5,904	)	$	330,985
	Residential mortgage-backed securities:
	Agency mortgage-backed securities		247,880			4,304			(1,303	)		250,881
	Agency collateralized mortgage obligations		511,098			895			(20,794	)		491,199
	Non-agency collateralized mortgage obligations		1,747			15			—			1,762
	States of the U.S. and political subdivisions		16,842			410			(250	)		17,002
	Collateralized debt obligations		37,203			4,507			(10,115	)		31,595
	Other debt securities		16,505			524			(929	)		16,100
	Total debt securities		1,168,038			10,781			(39,295	)		1,139,524
	Equity securities		1,444			682			—			2,126
		$	1,169,482		$	11,463		$	(39,295	)	$	1,141,650
	Securities Held to Maturity:
	March 31, 2014
	U.S. Treasury	$	502		$	123		$	—		$	625
	U.S. government-sponsored entities		101,787			181			(1,284	)		100,684
	Residential mortgage-backed securities:
	Agency mortgage-backed securities		725,154			12,529			(3,817	)		733,866
	Agency collateralized mortgage obligations		452,909			1,225			(11,976	)		442,158
	Non-agency collateralized mortgage obligations		6,352			24			—			6,376
	Commercial mortgage-backed securities		2,236			121			(15	)		2,342
	States of the U.S. and political subdivisions		131,506			2,392			(955	)		132,943
		$	1,420,446		$	16,595		$	(18,047	)	$	1,418,994
	December 31, 2013
	U.S. Treasury	$	503		$	99		$	—		$	602
	U.S. government-sponsored entities		43,322			180			(1,151	)		42,351
	Residential mortgage-backed securities:
	Agency mortgage-backed securities		628,681			12,281			(6,032	)		634,930
	Agency collateralized mortgage obligations		385,408			764			(15,844	)		370,328
	Non-agency collateralized mortgage obligations		6,852			44			(4	)		6,892
	Commercial mortgage-backed securities		2,241			124			(37	)		2,328
	States of the U.S. and political subdivisions		132,162			1,992			(2,022	)		132,132
		$	1,199,169		$	15,484		$	(25,090	)	$	1,189,563
	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 the BCSB, PVF and ANNB acquisitions as trading securities. The Corporation both acquired and sold these trading securities during the quarterly periods in which each of the acquisitions occurred. As of March 31, 2014 and December 31, 2013, the Corporation did not hold any trading securities.
	Gross gains and gross losses were realized on securities as follows:
		Three Months Ended
		March 31,
		2014			2013
	Gross gains	$	18,009		$	1,032
	Gross losses		(8,548	)		(348	)
		$	9,461		$	684
	During the first quarter of 2014, the Corporation strategically sold its entire portfolio of pooled trust preferred securities (TPS) with net proceeds of $51,540 and a gain of $13,766. 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 of 2010 (Dodd-Frank Act), and as such, was required to be disposed of by July 2015. 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 leverageable capital to support future growth.
	As of March 31, 2014, the amortized cost and fair value of securities, by contractual maturities, were as follows:
		Available for Sale						Held to Maturity
		Amortized			Fair			Amortized			Fair
Cost		Value			Cost			Value
Due in one year or less	$	—		$	—		$	2,716		$	2,766
Due from one to five years		209,466			207,689			77,526			76,567
Due from five to ten years		82,024			80,998			85,763			86,428
Due after ten years		7,588			6,739			67,790			68,491
		299,078			295,426			233,795			234,252
Residential mortgage-backed securities:
Agency mortgage-backed securities		352,209			355,941			725,154			733,866
Agency collateralized mortgage obligations		622,060			609,752			452,909			442,158
Non-agency collateralized mortgage obligations		1,661			1,679			6,352			6,376
Commercial mortgage-backed securities		9,153			9,129			2,236			2,342
Equity securities		1,444			2,143			—			—
	$	1,285,605		$	1,274,070		$	1,420,446		$	1,418,994
Maturities may differ from contractual terms because borrowers may have the right to call or prepay obligations with or without penalties. Periodic payments are received on mortgage-backed securities based on the payment patterns of the underlying collateral.
At March 31, 2014 and December 31, 2013, securities with a carrying value of $946,173 and $909,548, respectively, were pledged to secure public deposits, trust deposits and for other purposes as required by law. Securities with a carrying value of $811,881 and $860,279 at March 31, 2014 and December 31, 2013, 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			Unrealized			#			Fair		Unrealized			#		Fair		Unrealized
				Value			Losses						Value		Losses					Value		Losses
Securities Available for Sale:
March 31, 2014
U.S. government-sponsored entities		18		$	249,631		$	(3,699	)		—		$	—	$	—			18	$	249,631	$	(3,699	)
Residential mortgage-backed securities:
Agency mortgage-backed securities		11			177,722			(905	)		—			—		—			11		177,722		(905	)
Agency collateralized mortgage obligations		24			398,335			(9,937	)		4			68,266		(3,706	)		28		466,601		(13,643	)
Commercial mortgage-backed securities		1			9,129			(24	)		—			—		—			1		9,129		(24	)
States of the U.S. and political subdivisions		2			3,123			(149	)		—			—		—			2		3,123		(149	)
Other debt securities		—			—			—			4			6,020		(861	)		4		6,020		(861	)
		56		$	837,940		$	(14,714	)		8		$	74,286	$	(4,567	)		64	$	912,226	$	(19,281	)
December 31, 2013
U.S. government-sponsored entities		17		$	232,962		$	(5,904	)		—		$	—	$	—			17	$	232,962	$	(5,904	)
Residential mortgage-backed securities:
Agency mortgage-backed securities		9			108,284			(1,303	)		—			—		—			9		108,284		(1,303	)
Agency collateralized mortgage		26			389,989			(18,644	)		2			34,229		(2,150	)		28		424,218		(20,794	)
obligations
States of the U.S. and political subdivisions		2			3,022			(250	)		—			—		—			2		3,022		(250	)
Collateralized debt obligations		—			—			—			8			7,965		(10,115	)		8		7,965		(10,115	)
Other debt securities		—			—			—			4			5,950		(929	)		4		5,950		(929	)
		54		$	734,257		$	(26,101	)		14		$	48,144	$	(13,194	)		68	$	782,401	$	(39,295	)
Securities Held to Maturity:
March 31, 2014
U.S. government-sponsored entities		7		$	73,748		$	(788	)		1		$	14,504	$	(496	)		8	$	88,252	$	(1,284	)
Residential mortgage-backed securities:
Agency mortgage-backed securities		23			347,721			(3,745	)		1			1,304		(72	)		24		349,025		(3,817	)
Agency collateralized mortgage obligations		20			249,082			(8,442	)		4			66,850		(3,534	)		24		315,932		(11,976	)
Commercial mortgage-backed securities		1			1,005			(15	)		—			—		—			1		1,005		(15	)
States of the U.S. and political subdivisions		21			27,262			(955	)		—			—		—			21		27,262		(955	)
		72		$	698,818		$	(13,945	)		6		$	82,658	$	(4,102	)		78	$	781,476	$	(18,047	)
December 31, 2013
U.S. government-sponsored entities		2		$	24,513		$	(530	)		1		$	14,378	$	(621	)		3	$	38,891	$	(1,151	)
Residential mortgage-backed securities:
Agency mortgage-backed securities		24			308,864			(5,942	)		1			1,296		(90	)		25		310,160		(6,032	)
Agency collateralized mortgage obligations		21			301,312			(15,844	)		—			—		—			21		301,312		(15,844	)
Non-agency collateralized mortgage obligations		3			2,010			(4	)		—			—		—			3		2,010		(4	)
Commercial mortgage-backed securities		1			984			(37	)		—			—		—			1		984		(37	)
States of the U.S. and political subdivisions		27			31,537			(2,022	)		—			—		—			27		31,537		(2,022	)
		78		$	669,220		$	(24,379	)		2		$	15,674	$	(711	)		80	$	684,894	$	(25,090	)
The Corporation does not intend to sell the debt securities and it is not more likely than not the Corporation will be required to sell the securities before recovery of their amortized cost basis.
The Corporation’s unrealized losses on collateralized debt obligations (CDOs) as of December 31, 2013 related to investments in pooled TPS, all of which were sold during the first quarter of 2014 as previously noted. The Corporation’s remaining portfolio of TPS consists of four single-issuer securities, which are primarily from money-center and large regional banks and are included in other debt securities. These single-issuer TPS had an amortized cost and estimated fair value of $6,881 and $6,020 at March 31, 2014, respectively. The Corporation has concluded from its analysis performed at March 31, 2014 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			Residential			Equities			Total
	Debt			Non-Agency
	Obligations			CMOs
For the Three Months Ended March 31, 2014
Beginning balance	$	17,155		$	—		$	27		$	17,182
Loss where impairment was not previously recognized		—			—			—			—
Additional loss where impairment was previously recognized		—			—			—			—
Reduction due to credit impaired securities sold		(17,155	)		—			—			(17,155	)
Ending balance	$	—		$	—		$	27		$	27
For the Three Months Ended March 31, 2013
Beginning balance	$	17,155		$	212			—		$	17,367
Loss where impairment was not previously recognized		—			—			—			—
Additional loss where impairment was previously recognized		—			—			—			—
Reduction due to credit impaired securities sold		—			(212	)		—			(212	)
Ending balance	$	17,155		$	—			—		$	17,155
The Corporation did not recognize any impairment losses on securities for the three months ended March 31, 2014 or 2013.
States of the U.S. and Political Subdivisions
The Corporation’s municipal bond portfolio of $146,011 as of March 31, 2014 is highly rated with an average entity-specific rating of AA and 98.5% of the portfolio rated A or better. General obligation bonds comprise 98.9% of the portfolio. Geographically, municipal bonds support the Corporation’s footprint as 80.9% of the securities are from municipalities located throughout Pennsylvania. The average holding size of the securities in the municipal bond portfolio is $1,000. In addition to the strong stand-alone ratings, 69.2% of the municipalities have purchased credit enhancement insurance to strengthen the creditworthiness of their issue. Management also reviews the credit profile of each issuer on a quarterly basis.

FEDERAL_HOME_LOAN_BANK_STOCK

FEDERAL HOME LOAN BANK STOCK	3 Months Ended
	Mar. 31, 2014
Banking And Thrift [Abstract]	'
FEDERAL HOME LOAN BANK STOCK	'
	FEDERAL HOME LOAN BANK STOCK
	The Corporation is a member of the Federal Home Loan Bank (FHLB) of Pittsburgh. The FHLB requires members to purchase and hold a specified minimum level of FHLB stock based upon their level of borrowings, collateral balances and participation in other programs offered by the FHLB. Stock in the FHLB is non-marketable and is redeemable at the discretion of the FHLB. Both cash and stock dividends on FHLB stock are reported as income.
	Members do not purchase stock in the FHLB for the same reasons that traditional equity investors acquire stock in an investor-owned enterprise. Rather, members purchase stock to obtain access to the low-cost products and services offered by the FHLB. Unlike equity securities of traditional for-profit enterprises, the stock of FHLB does not provide its holders with an opportunity for capital appreciation because, by regulation, FHLB stock can only be purchased, redeemed and transferred at par value.
	At March 31, 2014 and December 31, 2013, the Corporation’s FHLB stock totaled $24,636 and $23,636, 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, 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_ALLOWANCE_FOR_LOAN_L

LOANS AND ALLOWANCE FOR LOAN LOSSES	3 Months Ended
	Mar. 31, 2014
Receivables [Abstract]	'
LOANS AND ALLOWANCE FOR LOAN LOSSES	'
	LOANS AND ALLOWANCE FOR LOAN LOSSES
	Following is a summary of loans, net of unearned income:
			Originated			Acquired			Total
			Loans			Loans			Loans
	March 31, 2014
	Commercial real estate		$	2,677,152		$	787,446		$	3,464,598
	Commercial and industrial			1,848,332			116,733			1,965,065
	Commercial leases			161,494			—			161,494
	Total commercial loans and leases			4,686,978			904,179			5,591,157
	Direct installment			1,386,940			80,618			1,467,558
	Residential mortgages			688,038			447,752			1,135,790
	Indirect installment			674,347			4,571			678,918
	Consumer lines of credit			848,883			161,618			1,010,501
	Other			59,212			—			59,212
			$	8,344,398			1,598,738		$	9,943,136
	December 31, 2013
	Commercial real estate		$	2,640,428		$	604,781		$	3,245,209
	Commercial and industrial			1,761,668			119,806			1,881,474
	Commercial leases			158,895			—			158,895
	Total commercial loans and leases			4,560,991			724,587			5,285,578
	Direct installment			1,387,995			79,241			1,467,236
	Residential mortgages			678,227			408,512			1,086,739
	Indirect installment			649,701			5,886			655,587
	Consumer lines of credit			832,668			133,103			965,771
	Other			45,183			—			45,183
			$	8,154,765		$	1,351,329		$	9,506,094
	The carrying amount of acquired loans at March 31, 2014 totaled $1,593,642, including purchased credit-impaired (PCI) loans with a carrying amount of $14,513, while the carrying amount of acquired loans at December 31, 2013 totaled $1,345,429, including PCI loans with a carrying amount of $21,192. The outstanding contractual balance receivable of acquired loans at March 31, 2014 totaled $1,704,889, including PCI loans with an outstanding contractual balance receivable of $46,809, while the outstanding contractual balance receivable of acquired loans at December 31, 2013 totaled $1,449,227, including PCI loans with an outstanding contractual balance receivable of $56,500.
	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 consist of loans 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 mezzanine loans and student loans.
	The loan 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 commercial real estate portfolio also includes run-off loans in Florida, which totaled $39,118 or 0.4% of total loans at March 31, 2014, compared to $39,379 or 0.4% of total loans at December 31, 2013. Additionally, the total loan portfolio contains consumer finance loans to individuals in Pennsylvania, Ohio, Tennessee and Kentucky, which totaled $171,228 or 1.7% of total loans at March 31, 2014, compared to $179,970 or 1.9% of total loans at December 31, 2013. Due to the relative size of the consumer finance loan portfolio, they are not segregated from other consumer loans.
	As of March 31, 2014, 42.0% of the commercial real estate loans were owner-occupied, while the remaining 58.0% were non-owner-occupied, compared to 43.1% and 56.9%, respectively, as of December 31, 2013. As of March 31, 2014 and December 31, 2013, the Corporation had commercial construction loans of $270,913 and $252,842, respectively, representing 2.7% of total loans.
	ASC 310-30 Loans
	All loans acquired in the BCSB, PVF and ANNB acquisitions, except for revolving loans, are accounted for in accordance with ASC 310-30. Revolving loans are accounted for under ASC 310-20. The Corporation’s allowance for loan losses for acquired loans reflects only those losses incurred after acquisition.
	The following table reflects amounts at acquisition for all purchased loans subject to ASC 310-30 (impaired and non-impaired) acquired from PVF and ANNB in 2013. ASC 310-30 (impaired and non-impaired) loans acquired from BCSB in 2014 are not presented because their values are expected to be immaterial, are preliminary in nature and are subject to refinement as additional information becomes available.
			Acquired			Acquired			Total
			Impaired			Performing
			Loans			Loans
	Acquired from PVF and ANNB in 2013
	Contractually required cash flows at acquisition		$	40,972		$	796,114		$	837,086
	Non-accretable difference (expected losses and foregone interest)			(23,207	)		(52,992	)		(76,199	)
	Cash flows expected to be collected at acquisition			17,765			743,122			760,887
	Accretable yield			(2,505	)		(112,847	)		(115,352	)
	Basis in acquired loans at acquisition		$	15,260		$	630,275		$	645,535
	The following table provides a summary of change in accretable yield for all acquired loans, excluding loans from the BCSB acquisition.
			Acquired			Acquired			Total
			Impaired			Performing
			Loans			Loans
	Three Months Ended March 31, 2014
	Balance at beginning of period		$	7,456		$	298,190		$	305,646
	Acquisitions			—			—			—
	Reduction due to unexpected early payoffs			—			(12,694	)		(12,694	)
	Reclass from non-accretable difference			332			436			768
	Disposals/transfers			(759	)		(185	)		(944	)
	Accretion			(1,264	)		(14,649	)		(15,913	)
	Balance at end of period		$	5,765		$	271,098		$	276,863
	Year Ended December 31, 2013
	Balance at beginning of period		$	778		$	253,375		$	254,153
	Acquisitions			2,505			112,847			115,352
	Reduction due to unexpected early payoffs			—			(42,582	)		(42,582	)
	Reclass from non-accretable difference			8,097			8,296			16,393
	Disposals/transfers			(368	)		(224	)		(592	)
	Accretion			(3,556	)		(33,522	)		(37,078	)
	Balance at end of period		$	7,456		$	298,190		$	305,646
	Purchased Credit-Impaired (PCI) Loans
The Corporation has acquired loans for which there was evidence of deterioration of credit quality since origination and for which it was probable, at acquisition, that all contractually required payments would not be collected.
Following is information about PCI loans. The table below does not include impaired loans from the BCSB acquisition because their values are expected to be immaterial, are preliminary in nature and are subject to refinement as additional information becomes available.
		Outstanding			Non-Accretable			Expected			Accretable			Recorded
		Balance			Difference			Cash Flows			Yield			Investment
For the Three Months Ended March 31, 2014
Balance at beginning of period		$	56,500		$	(26,852	)	$	29,648		$	(7,456	)	$	22,192
Acquisitions			—			—			—			—			—
Accretion			—			—			—			1,264			1,264
Payments received			(8,040	)		437			(7,603	)		—			(7,603	)
Reclass from non-accretable difference			—			332			332			(332	)		—
Disposals/transfers			(2,520	)		1,129			(1,391	)		759			(632	)
Contractual interest			869			(869	)		—			—			—
Balance at end of period		$	46,809		$	(25,823	)	$	20,896		$	(5,765	)	$	15,221
For the Year Ended December 31, 2013
Balance at beginning of period		$	41,134		$	(23,733	)	$	17,401		$	(778	)	$	16,623
Acquisitions			42,031			(24,266	)		17,765			(2,505	)		15,260
Accretion			—			—			—			3,556			3,556
Payments received			(10,670	)		1,345			(9,325	)		—			(9,325	)
Reclass from non-accretable difference			—			8,097			8,097			(8,097	)		—
Disposals/transfers			(18,695	)		14,405			(4,290	)		368			(3,922	)
Contractual interest			2,700			(2,700	)		—			—			—
Balance at end of period		$	56,500		$	(26,852	)	$	29,648		$	(7,456	)	$	22,192
The accretion in the table above includes $242 in 2014 and $440 in 2013 that primarily represents payoffs received on certain loans in excess of expected cash flows.
Credit Quality
Management monitors the credit quality of the Corporation’s loan portfolio on an ongoing basis. Measurement of delinquency and past due status are based on the contractual terms of each loan.
Non-performing loans include non-accrual loans and non-performing troubled debt restructurings (TDRs). Past due loans are reviewed on a monthly basis to identify loans for non-accrual status. The Corporation places a loan on non-accrual status and discontinues interest accruals on originated loans generally when principal or interest is due and has remained unpaid for a certain number of days unless the loan is both well secured and in the process of collection. Commercial loans are placed on non-accrual at 90 days, installment loans are placed on non-accrual at 120 days and residential mortgages and consumer lines of credit are generally placed on non-accrual at 180 days. When a loan is placed on non-accrual status, all unpaid interest is reversed. Non-accrual loans may not be restored to accrual status until all delinquent principal and interest have been paid and the ultimate ability to collect the remaining principal and interest is reasonably assured. TDRs are loans in which the borrower has been granted a concession on the interest rate or the original repayment terms due to financial distress. Non-performing assets also include debt securities on which OTTI has been taken in the current or prior periods that have not been returned to accrual status.
Following is a summary of non-performing assets:
		March 31,			December 31,
		2014			2013
Non-accrual loans		$	60,039		$	58,755
Troubled debt restructurings			19,384			18,698
Total non-performing loans			79,423			77,453
Other real estate owned (OREO)			43,216			40,681
Total non-performing loans and OREO			122,639			118,134
Non-performing investments			—			797
Total non-performing assets		$	122,639		$	118,931
Asset quality ratios:
Non-performing loans as a percent of total loans			0.8	%		0.81	%
Non-performing loans + OREO as a percent of total loans + OREO			1.23	%		1.24	%
Non-performing assets as a percent of total assets			0.85	%		0.88	%
The following tables provide an analysis of the aging of the Corporation’s past due loans by class, segregated by loans originated and loans acquired:
		30-89 Days			>90 Days			Non-			Total			Current			Total
		Past Due			Past Due and			Accrual			Past Due						Loans
					Still Accruing
Originated loans:
March 31, 2014
Commercial real estate		$	6,297		$	243		$	43,385		$	49,925		$	2,627,227		$	2,677,152
Commercial and industrial			2,564			8			4,194			6,766			1,841,566			1,848,332
Commercial leases			1,150			—			744			1,894			159,600			161,494
Total commercial loans and leases			10,011			251			48,323			58,585			4,628,393			4,686,978
Direct installment			7,893			2,876			6,405			17,174			1,369,766			1,386,940
Residential mortgages			8,591			1,406			3,521			13,518			674,520			688,038
Indirect installment			3,762			240			1,259			5,261			669,086			674,347
Consumer lines of credit			2,207			685			531			3,423			845,460			848,883
Other			26			9			—			35			59,177			59,212
		$	32,490		$	5,467		$	60,039		$	97,996		$	8,246,402		$	8,344,398
December 31, 2013
Commercial real estate		$	5,428		$	252		$	40,960		$	46,640		$	2,593,788		$	2,640,428
Commercial and industrial			2,066			8			6,643			8,717			1,752,951			1,761,668
Commercial leases			714			—			734			1,448			157,447			158,895
Total commercial loans and leases			8,208			260			48,337			56,805			4,504,186			4,560,991
Direct installment			9,038			3,753			4,686			17,477			1,370,518			1,387,995
Residential mortgages			12,681			2,401			4,260			19,342			658,885			678,227
Indirect installment			5,653			471			1,060			7,184			642,517			649,701
Consumer lines of credit			1,737			1,076			412			3,225			829,443			832,668
Other			25			10			—			35			45,148			45,183
		$	37,342		$	7,971		$	58,755		$	104,068		$	8,050,697		$	8,154,765
		30-89			> 90 Days			Non-			Total			Current			Discount			Total
		Days			Past Due			Accrual			Past									Loans
		Past Due			and Still						Due (1)
					Accruing
Acquired Loans:
March 31, 2014
Commercial real estate		$	23,180		$	31,063			—		$	54,243		$	790,425		$	(57,222	)	$	787,446
Commercial and industrial			726			5,296			—			6,022			119,541			(8,830	)		116,733
Commercial leases			—			—			—			—			—			—			—
Total commercial loans and leases			23,906			36,359			—			60,265			909,966			(66,052	)		904,179
Direct installment			1,112			957			—			2,069			76,628			1,921			80,618
Residential mortgages			8,514			20,886			—			29,400			452,306			(33,954	)		447,752
Indirect installment			101			31			—			132			5,032			(593	)		4,571
Consumer lines of credit			1,035			3,396			—			4,431			164,660			(7,473	)		161,618
Other			—			—			—			—			—			—			—
		$	34,668		$	61,629			—		$	96,297		$	1,608,592		$	(106,151	)	$	1,598,738
December 31, 2013
Commercial real estate		$	13,637		$	20,668			—		$	34,305		$	619,197		$	(48,721	)	$	604,781
Commercial and industrial			1,860			1,899			—			3,759			124,415			(8,368	)		119,806
Commercial leases			—			—			—			—			—			—			—
Total commercial loans and leases			15,497			22,567			—			38,064			743,612			(57,089	)		724,587
Direct installment			1,447			1,178			—			2,625			74,917			1,699			79,241
Residential mortgages			11,464			19,298			—			30,762			412,704			(34,954	)		408,512
Indirect installment			205			31			—			236			6,267			(617	)		5,886
Consumer lines of credit			1,592			2,749			—			4,341			135,699			(6,937	)		133,103
Other			—			—			—			—			—			—			—
		$	30,205		$	45,823			—		$	76,028		$	1,373,199		$	(97,898	)	$	1,351,329
-1	Past due information for loans acquired is based on the contractual balance outstanding at March 31, 2014 and December 31, 2013.
The Corporation utilizes the following categories to monitor credit quality within its commercial loan portfolio:
Rating		Definition
Category
Pass		in general, the condition of the borrower and the performance of the loan 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 of the borrower has significantly deteriorated and the performance of
		the loan 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 portfolio permits management’s use of migration and roll rate analysis 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 conforms with regulatory categories. In general, loan risk ratings within each category are reviewed on an ongoing basis according to the Corporation’s policy for each class of loans. 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 portfolio. Loans within the Pass credit category or that migrate toward the Pass credit category generally have a lower risk of loss compared to loans 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 by credit quality category, segregated by loans originated and loans acquired:
		Commercial Loan Credit Quality Categories
		Pass			Special			Substandard			Doubtful			Total
					Mention
Originated Loans:
March 31, 2014
Commercial real estate		$	2,501,710		$	70,417		$	103,838		$	1,187		$	2,677,152
Commercial and industrial			1,688,867			97,558			61,642			265			1,848,332
Commercial leases			158,289			2,182			1,023			—			161,494
		$	4,348,866		$	170,157		$	166,503		$	1,452		$	4,686,978
December 31, 2013
Commercial real estate		$	2,476,988		$	56,140		$	106,599		$	701		$	2,640,428
Commercial and industrial			1,611,530			97,675			52,322			141			1,761,668
Commercial leases			155,991			1,945			959			—			158,895
		$	4,244,509		$	155,760		$	159,880		$	842		$	4,560,991
Acquired Loans:
March 31, 2014
Commercial real estate		$	575,859		$	94,461		$	111,306		$	5,820		$	787,446
Commercial and industrial			98,716			4,265			13,702			50			116,733
Commercial leases			—			—			—			—			—
		$	674,575		$	98,726		$	125,008		$	5,870		$	904,179
December 31, 2013
Commercial real estate		$	442,604		$	74,315		$	85,086		$	2,776		$	604,781
Commercial and industrial			100,743			6,182			12,866			15			119,806
Commercial leases			—			—			—			—			—
		$	543,347		$	80,497		$	97,952		$	2,791		$	724,587
Credit quality information for acquired loans is based on the contractual balance outstanding at March 31, 2014 and December 31, 2013. The increase in acquired loans in 2014 primarily relates to the BCSB acquisition on February 15, 2014.
The Corporation uses payment status and delinquency migration analysis 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, as well as other external statistics and factors such as unemployment, to determine how consumer loans are performing.
Following is a table showing originated consumer loans by payment status:
		Consumer Loan Credit Quality
		by Payment Status
		Performing			Non-Performing			Total
March 31, 2014
Direct installment		$	1,374,893		$	12,047		$	1,386,940
Residential mortgages			674,077			13,961			688,038
Indirect installment			672,948			1,399			674,347
Consumer lines of credit			847,961			922			848,883
Other			59,212			—			59,212
December 31, 2013
Direct installment		$	1,377,418		$	10,577		$	1,387,995
Residential mortgages			664,214			14,013			678,227
Indirect installment			648,499			1,202			649,701
Consumer lines of credit			832,071			597			832,668
Other			45,183			—			45,183
Loans 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 contract is doubtful. Typically, the Corporation does not consider loans 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, commercial leases and commercial loan relationships less than $500. 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, 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 considered to be impaired, by class of loans:
		Recorded			Unpaid			Specific			Average
		Investment			Principal			Related			Recorded
					Balance			Allowance			Investment
At or For the Three Months Ended March 31, 2014
With no specific allowance recorded:
Commercial real estate		$	36,987		$	50,287		$	—		$	38,730
Commercial and industrial			4,972			6,613			—			6,136
Commercial leases			744			744			—			739
Total commercial loans and leases			42,703			57,644			—			45,605
Direct installment			12,047			12,150			—			11,312
Residential mortgages			13,961			14,507			—			88,787
Indirect installment			1,399			2,861			—			1,301
Consumer lines of credit			922			1,000			—			760
Other			—			—			—			—
With a specific allowance recorded:
Commercial real estate			9,344			19,951			1,087			6,474
Commercial and industrial			181			190			181			152
Commercial leases			—			—			—			—
Total commercial loans and leases			9,525			20,141			1,268			6,626
Direct installment			—			—			—			—
Residential mortgages			—			—			—			—
Indirect installment			—			—			—			—
Consumer lines of credit			—			—			—			—
Other			—			—			—			—
Total:
Commercial real estate			46,331			70,238			1,087			45,204
Commercial and industrial			5,153			6,803			181			6,288
Commercial leases			744			744			—			739
Total commercial loans and leases			52,228			77,785			1,268			52,231
Direct installment			12,047			12,150			—			11,312
Residential mortgages			13,961			14,507			—			88,787
Indirect installment			1,399			2,861			—			1,301
Consumer lines of credit			922			1,000			—			760
Other			—			—			—			—
		Recorded			Unpaid			Specific			Average
		Investment			Principal			Related			Recorded
					Balance			Allowance			Investment
At or For the Year Ended December 31, 2013
With no specific allowance recorded:
Commercial real estate		$	40,472		$	62,034		$	—		$	37,376
Commercial and industrial			7,301			8,669			—			8,304
Commercial leases			734			734			—			758
Total commercial loans and leases			48,507			71,437			—			46,438
Direct installment			10,577			10,830			—			10,557
Residential mortgages			14,012			14,560			—			13,565
Indirect installment			1,202			2,633			—			1,127
Consumer lines of credit			597			668			—			573
Other			—			—			—			—
With a specific allowance recorded:
Commercial real estate			3,603			3,818			701			14,379
Commercial and industrial			122			130			123			126
Commercial leases			—			—			—			—
Total commercial loans and leases			3,725			3,948			824			14,505
Direct installment			—			—			—			—
Residential mortgages			—			—			—			—
Indirect installment			—			—			—			—
Consumer lines of credit			—			—			—			—
Other			—			—			—			—
Total:
Commercial real estate			44,075			65,852			701			51,755
Commercial and industrial			7,423			8,799			123			8,430
Commercial leases			734			734			—			758
Total commercial loans and leases			52,232			75,385			824			60,943
Direct installment			10,577			10,830			—			10,557
Residential mortgages			14,012			14,560			—			13,565
Indirect installment			1,202			2,633			—			1,127
Consumer lines of credit			597			668			—			573
Other			—			—			—			—
Interest income is generally no longer recognized once a loan becomes impaired.
The above tables do not include PCI loans with a recorded investment of $15,221 at March 31, 2014 and $22,192 at December 31, 2013. These tables do not reflect the additional allowance for loan losses relating to acquired loans in the following pools and categories: commercial real estate of $2,612; commercial and industrial of $817; direct installment of $906; residential mortgages of $504; and indirect installment of $257, totaling $5,096 at March 31, 2014 and commercial real estate of $3,093; commercial and industrial of $786; direct installment of $727; residential mortgages of $970 and indirect installment of $324, totaling $5,900 at December 31, 2013.
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 composition of total TDRs:
		March 31,			December 31,
		2014			2013
Accruing:
Performing		$	10,289		$	10,220
Non-performing			19,384			18,698
Non-accrual			12,389			12,705
		$	42,062		$	41,623
TDRs that are accruing and performing include loans that met the criteria for non-accrual of interest prior to restructuring for which the Corporation can reasonably estimate the timing and amount of the expected cash flows on such loans and for which the Corporation expects to fully collect the new carrying value of the loans. During the three months ended March 31, 2014, the Corporation returned to performing status $3,194 in restructured loans, all of which were secured by residential mortgages 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 result in potential incremental losses which are factored into the allowance for loan 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 loan losses included specific reserves for commercial TDRs of $523 and $561 at March 31, 2014 and December 31, 2013, respectively, and pooled reserves for individual loans under $500 of $188 and $193 for those same respective periods, based on historical loss experience. 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 loan 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 loan losses included pooled reserves for these classes of loans of $1,026 and $1,005 at March 31, 2014 and December 31, 2013, respectively. Upon default of an individual loan, the Corporation’s charge-off policy is followed accordingly for that class of loan.
The majority of TDRs are the result of interest rate concessions for a limited period of time. Following is a summary of loans, by class, that have been restructured during the periods indicated:
		Three Months Ended March 31, 2014									Three Months Ended March 31, 2013
		Number			Pre-Modification			Post-			Number			Pre-Modification			Post-
		of			Outstanding			Modification			of			Outstanding			Modification
		Contracts			Recorded			Outstanding			Contracts			Recorded			Outstanding
					Investment			Recorded						Investment			Recorded
								Investment									Investment
Commercial real estate			1		$	188		$	188			5		$	1,029		$	905
Commercial and industrial			1			52			50			—			—			—
Commercial leases			—			—			—			—			—			—
Total commercial loans and leases			2			240			238			5			1,029			905
Direct installment			126			1,678			1,647			110			1,176			1,150
Residential mortgages			9			281			280			14			597			709
Indirect installment			7			17			16			10			56			56
Consumer lines of credit			7			255			255			9			173			172
Other			—			—			—			—			—			—
			151		$	2,471		$	2,436			148		$	3,031		$	2,992
Following is a summary of TDRs, by class of loans, 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						Three Months Ended
		March 31, 2014 (1)						March 31, 2013 (1)
		Number of			Recorded			Number of			Recorded
		Contracts			Investment			Contracts			Investment
Commercial real estate			—		$	—			—		$	—
Commercial and industrial			—			—			1			33
Commercial leases			—			—			—			—
Total commercial loans and leases			—			—			1			33
Direct installment			18			171			21			170
Residential mortgages			—			—			2			93
Indirect installment			1			—			4			18
Consumer lines of credit			—			—			—			—
Other			—			—			—			—
			19		$	171			28		$	314
-1	The recorded investment is as of period end.
Allowance for Loan Losses
The allowance for loan losses is established as losses are estimated to have occurred through a provision charged to earnings. Loan losses are charged against the allowance for loan losses when management believes the uncollectibility of a loan balance is confirmed. Subsequent recoveries, if any, are credited to the allowance for loan losses. Allowances for impaired loans are generally determined based on collateral values or the present value of estimated cash flows. Changes in the allowance for loan losses related to impaired loans are charged or credited to the provision for loan losses.
The allowance for loan losses is maintained at a level that, in management’s judgment, is believed adequate to absorb probable losses associated with specifically identified loans, as well as estimated probable credit losses inherent in the remainder of the loan portfolio. Adequacy of the allowance for loan losses is based on management’s evaluation of potential loan losses in the loan 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 loan portfolio, the estimated value of underlying collateral and residuals and changes in the composition of the loan portfolio. Determination of the allowance for loan losses is inherently subjective as it requires significant estimates, including the amounts and timing of expected future cash flows on impaired loans, estimated losses on pools of homogeneous loans based on historical loss experience and consideration of current environmental factors and economic trends, 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 loan losses.
Following is a summary of changes in the allowance for loan losses, by loan class:
		Balance at			Charge-			Recoveries			Net			Provision			Balance at
		Beginning of			Offs						Charge-			for Loan			End of
		Period									Offs			Losses			Period
Three Months Ended March 31, 2014
Commercial real estate		$	32,548		$	(2,223	)	$	299		$	(1,924	)	$	7,910		$	38,534
Commercial and industrial			32,603			(513	)		370			(143	)		(2,489	)		29,971
Commercial leases			1,903			(87	)		29			(58	)		99			1,944
Total commercial loans and leases			67,054			(2,823	)		698			(2,125	)		5,520			70,449
Direct installment			17,824			(2,521	)		267			(2,254	)		1,060			16,630
Residential mortgages			5,836			(132	)		4			(128	)		(401	)		5,307
Indirect installment			6,409			(802	)		217			(585	)		676			6,500
Consumer lines of credit			7,231			(323	)		55			(268	)		695			7,658
Other			530			(262	)		5			(257	)		306			579
Total allowance on originated loans			104,884			(6,863	)		1,246			(5,617	)		7,856			107,123
Purchased credit-impaired loans			1,000			(249	)		—			(249	)		(43	)		708
Other acquired loans			4,900			9			286			295			(807	)		4,388
Total allowance on acquired loans			5,900			(240	)		286			46			(850	)		5,096
Total allowance		$	110,784		$	(7,103	)	$	1,532		$	(5,571	)	$	7,006		$	112,219
Three Months Ended March 31, 2013
Commercial real estate		$	34,810		$	(2,287	)	$	1,427		$	(860	)	$	6,062		$	40,012
Commercial and industrial			31,849			(208	)		356			148			(3,159	)		28,838
Commercial leases			1,744			(57	)		62			5			(53	)		1,696
Total commercial loans and leases			68,403			(2,552	)		1,845			(707	)		2,850			70,546
Direct installment			15,130			(2,345	)		233			(2,112	)		2,082			15,100
Residential mortgages			5,155			(209	)		29			(180	)		3			4,978
Indirect installment			5,449			(810	)		193			(617	)		320			5,152
Consumer lines of credit			6,057			(342	)		87			(255	)		243			6,045
Other			—			(177	)		—			(177	)		860			683
Total allowance on originated loans			100,194			(6,435	)		2,387			(4,048	)		6,358			102,504
Purchased credit-impaired loans			759			(156	)		—			(156	)		(20	)		583
Other acquired loans			3,421			(213	)		204			(9	)		1,203			4,615
Total allowance on acquired loans			4,180			(369	)		204			(165	)		1,183			5,198
Total allowance		$	104,374		$	(6,804	)	$	2,591		$	(4,213	)	$	7,541		$	107,702
Following is a summary of the individual and collective originated allowance for loan losses and corresponding loan balances by class:
		Allowance						Loans Outstanding
		Individually			Collectively			Loans			Individually			Collectively
		Evaluated for			Evaluated for						Evaluated for			Evaluated for
		Impairment			Impairment						Impairment			Impairment
March 31, 2014
Commercial real estate		$	1,087		$	37,446		$	2,677,152		$	34,062		$	2,643,090
Commercial and industrial			181			29,791			1,848,332			1,704			1,846,628
Commercial leases			—			1,945			161,494			—			161,494
Total commercial loans and leases			1,268			69,182			4,686,978			35,766			4,651,212
Direct installment			—			16,629			1,386,940			—			1,386,940
Residential mortgages			—			5,307			688,038			—			688,038
Indirect installment			—			6,500			674,347			—			674,347
Consumer lines of credit			—			7,658			848,883			—			848,883
Other			—			579			59,212			—			59,212
		$	1,268		$	105,855		$	8,344,398		$	35,766		$	8,308,632
December 31, 2013
Commercial real estate		$	701		$	31,847		$	2,640,428		$	30,133		$	2,610,295
Commercial and industrial			123			32,480			1,761,668			4,243			1,757,425
Commercial leases			—			1,903			158,895			—			158,895
Total commercial loans and leases			824			66,230			4,560,991			34,376			4,526,615
Direct installment			—			17,824			1,387,995			—			1,387,995
Residential mortgages			—			5,836			678,227			—			678,227
Indirect installment			—			6,409			649,701			—			649,701
Consumer lines of credit			—			7,231			832,668			—			832,668
Other			—			530			45,183			—			45,183
		$	824		$	104,060		$	8,154,765		$	34,376		$	8,120,389

BORROWINGS

BORROWINGS	3 Months Ended
	Mar. 31, 2014
Debt Disclosure [Abstract]	'
BORROWINGS	'
	BORROWINGS
	Following is a summary of short-term borrowings:
		March 31,		December 31,
		2014		2013
	Securities sold under repurchase agreements	$	787,712	$	841,741
	Federal funds purchased		300,000		270,000
	Subordinated notes		128,912		129,498
		$	1,216,624	$	1,241,239
	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 debt:
		March 31,		December 31,
		2014		2013
	Federal Home Loan Bank advances	$	150,073	$	50,076
	Subordinated notes		85,679		84,637
	Other subordinated debt		—		8,637
	Convertible debt		—		578
		$	235,752	$	143,928
	The Corporation’s banking affiliate has available credit with the FHLB of $3,574,396 of which $150,073 was used as of March 31, 2014. These advances are secured by loans collateralized by 1-4 family mortgages and FHLB stock and are scheduled to mature in various amounts periodically through the year 2019. Effective interest rates paid on these advances ranged from 0.95% to 4.19% for the three months ended March 31, 2014 and 1.06% to 4.19% for the year ended December 31, 2013.

JUNIOR_SUBORDINATED_DEBT

JUNIOR SUBORDINATED DEBT	3 Months Ended
	Mar. 31, 2014
Text Block [Abstract]	'
JUNIOR SUBORDINATED DEBT	'
	JUNIOR SUBORDINATED DEBT
	The Corporation has three unconsolidated subsidiary trusts as of March 31, 2014 (collectively, the Trusts): F.N.B. Statutory Trust II, Omega Financial Capital Trust I and BCSB Capital Trust II. 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 and BCSB Capital Trust II were assumed as a result of acquisitions.
	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. The subordinated debt, net of the Corporation’s investment in the Trusts, qualifies as tier 1 capital under the Board of Governors of the Federal Reserve System (FRB) guidelines. Under recently issued capital guidelines, these TPS obligations are subject to limitations when total assets of the Corporation exceed $15,000,000. 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.
	During the first quarter of 2014, the Corporation redeemed $23,000 of the Corporation-issued TPS, including $6,500 that the Corporation assumed as a result of the BCSB acquisition. During 2013, the Corporation redeemed $130,000 of the Corporation-issued TPS. The Corporation proactively redeemed these Corporation-issued TPS, primarily using proceeds from the November 2013 capital raise, in anticipation of meeting the limitations as described above. Under applicable regulatory capital guidelines issued by the bank regulatory agencies, upon notice of redemption, the redeemed TPS no longer qualify as tier 1 capital for the Corporation. The BCSB Capital Trust II holders were redeemed and paid in full on April 7, 2014.
	The following table provides information relating to the Trusts as of March 31, 2014:
		Trust		Common		Junior		Stated		Interest
		Preferred		Securities		Subordinated		Maturity		Rate
		Securities				Debt		Date
	F.N.B. Statutory Trust II	$	21,500	$	665	$	22,165		6/15/36		1.88	%	Variable; LIBOR + 165
													basis points (bps)
	Omega Financial Capital Trust I		36,000		1,114		36,042		10/18/34		2.43	%	Variable; LIBOR + 219 bps
	BCSB Capital Trust II		10,000		310		10,310		10/7/33		3.24	%	Variable; LIBOR + 300 bps
		$	67,500	$	2,089	$	68,517

DERIVATIVE_INSTRUMENTS

DERIVATIVE INSTRUMENTS	3 Months Ended
	Mar. 31, 2014
Derivative Instruments And Hedging Activities Disclosure [Abstract]	'
DERIVATIVE INSTRUMENTS	'
	DERIVATIVE INSTRUMENTS
	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. Interest rate swaps are the primary derivative instrument used by the Corporation for interest rate management. The Corporation also uses derivative instruments to facilitate transactions on behalf of its customers.
	Commercial Borrower Derivatives
	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 Corporation then enters into positions with a derivative counterparty in order to offset its exposure on the fixed components of the customer agreements. 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. The Corporation seeks to minimize counterparty credit risk by entering into transactions with only high-quality institutions. These arrangements meet the definition of derivatives, but are not designated as hedging instruments under ASC 815, Derivatives and Hedging. 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.
	Risk Management Derivatives
	The Corporation entered into interest rate derivative agreements in order to manage its net interest income by increasing the stability of the net interest income over a range of potential interest rate scenarios. Interest rate swaps are also used to modify the interest rate characteristics of designated commercial loans from variable to fixed in order to reduce the impact of changes in future cash flows due to 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. Gains and losses from hedge ineffectiveness recognized in the consolidated statement of comprehensive income were not material for the three months ended March 31, 2014.
	In accordance with the requirements of ASU No. 2011-04, the Corporation made an accounting policy election to use the portfolio exception with respect to measuring derivative instruments, consistent with the guidance in ASC 820. The Corporation further documents that it meets the criteria for this exception as follows:
		•		The Corporation manages credit risk for its derivative positions on a counterparty-by-counterparty basis, consistent with its risk management strategy for such transactions. The Corporation manages credit risk by considering indicators of risk such as credit ratings, and by negotiating terms in its master netting arrangements and credit support annex documentation with each individual counterparty. Review of credit risk plays a central role in the decision of which counterparties to consider for such relationships and when deciding with whom it will enter into derivative transactions.
		•		Since the effective date of ASC 820, the Corporation’s management has monitored and measured credit risk and calculated credit valuation adjustments (CVAs) for its derivative transactions on a counterparty-by-counterparty basis. Management receives reports from an independent third-party valuation specialist on a monthly basis to assist in determining CVAs by counterparty for purposes of reviewing and managing its credit risk exposures. Since the portfolio exception applies only to the fair value measurement and not to the financial statement presentation, the portfolio-level adjustments are then allocated in a reasonable and consistent manner each period to the individual assets or liabilities that make up the counterparty derivative portfolio, in accordance with the Corporation’s accounting policy elections.
	The Corporation notes that key market participants take into account the existence of such arrangements that mitigate credit risk exposure in the event of default. As such, the Corporation formally elects to apply the portfolio exception in ASC 820 with respect to measuring counterparty credit risk for all of its derivative transactions subject to master netting arrangements.
	At March 31, 2014, the Corporation was party to 318 swaps with customers with notional amounts totaling $840,190 and 284 swaps with derivative counterparties with notional amounts totaling $1,040,190.
	Derivative assets are classified in the balance sheet under “other assets” and derivative liabilities are classified in the balance sheet under “other liabilities.” The following tables present information about derivative assets and derivative liabilities that are subject to enforceable master netting agreements as well as those not subject to enforceable master netting arrangements:
			Gross		Gross			Net Amount
			Amount		Amounts			Presented in
					Offset in			the Balance
					the Balance			Sheet
					Sheet
	Offsetting of Derivative Assets:
	March 31, 2014
	Derivative assets subject to master netting arrangement:
	Interest rate contracts		$	2,172		—		$	2,172
	Equity contracts			41		—			41
	Derivative assets not subject to master netting arrangement:
	Interest rate contracts			31,079		—			31,079
	Total derivative assets		$	33,292		—		$	33,292
	December 31, 2013
	Derivative assets subject to master netting arrangement:
	Interest rate contracts		$	3,547		—		$	3,547
	Equity contracts			32		—			32
	Derivative assets not subject to master netting arrangement:
	Interest rate contracts			29,738		—			29,738
	Total derivative assets		$	33,317		—		$	33,317
	Offsetting of Derivative Liabilities:
	March 31, 2014
	Derivative liabilities subject to master netting arrangement:
	Interest rate contracts		$	38,332		—		$	38,332
	Derivative liabilities not subject to master netting arrangement:
	Interest rate contracts			1,792		—			1,792
	Equity contracts			41		—			41
	Total derivative liabilities		$	40,165		—		$	40,165
	December 31, 2013
	Derivative liabilities subject to master netting arrangement:
	Interest rate contracts		$	40,323		—		$	40,323
	Derivative liabilities not subject to master netting arrangement:
	Interest rate contracts			3,014		—			3,014
	Equity contracts			32		—			32
	Total derivative liabilities		$	43,369		—		$	43,369
	The following tables present 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:
					Gross Amounts Not Offset in the
					Balance Sheet
			Net Amount		Financial			Cash		Net
			Presented in the		Instruments			Collateral		Amount
			Balance Sheet					Received
	Derivative Assets:
	March 31, 2014
	Counterparty B		$	17	$	17		$	—	$	—
	Counterparty D			246		246			—		—
	Counterparty E			1,046		1,046			—		—
	Counterparty F			233		233			—		—
	Counterparty G			133		133			—		—
	Counterparty I			405		405			—		—
	Counterparty J			133		—			133		—
			$	2,213	$	2,080		$	133		—
December 31, 2013
Counterparty B		$	24	$	24		$	—	$	—
Counterparty D			566		566			—		—
Counterparty E			1,696		1,696			—		—
Counterparty F			355		273			—		82
Counterparty G			251		251			—		—
Counterparty I			634		634			—		—
Counterparty J			53		—			53		—
		$	3,579	$	3,444		$	53	$	82
Derivative Liabilities:
March 31, 2014
Counterparty A		$	4,682	$	4,682		$	—	$	—
Counterparty B			3,005		3,005			—
Counterparty C			1,356		1,356			—		—
Counterparty D			8,855		8,855			—		—
Counterparty E			5,093		5,093			—		—
Counterparty F			15		15			—		—
Counterparty G			4,804		4,804			—		—
Counterparty H			2,119		—			—		2,119
Counterparty I			5,731		5,731			—		—
Counterparty J			2,672		—			2,672		—
		$	38,332	$	33,541		$	2,672	$	2,119
December 31, 2013
Counterparty A		$	4,934	$	4,934		$	—	$	—
Counterparty B			3,249		3,249			—		—
Counterparty C			1,431		1,431			—		—
Counterparty D			9,614		9,614			—		—
Counterparty E			6,257		6,257			—		—
Counterparty F			13		13			—		—
Counterparty G			5,309		5,309			—		—
Counterparty H			2,257		125			—		2,132
Counterparty I			5,649		5,649			—		—
Counterparty J			1,610		—			1,610		—
		$	40,323	$	36,581		$	1,610	$	2,132
The following table presents the effect of the Corporation’s derivative financial instruments on the income statement:
		Income		Three Months Ended
		Statement		March 31,
		Location		2014			2013
Interest Rate Products			Other income	$	(14	)	$	136
The Corporation has agreements with each of its derivative counterparties that contain a provision where if the Corporation defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then the Corporation could also be declared in default on its derivative obligations. The Corporation also has agreements with certain of its derivative counterparties that contain a provision that if the Corporation fails to maintain its status as a well-capitalized institution, then the counterparty could terminate the derivative positions and the Corporation would be required to settle its obligations under the agreements. Certain of the Corporation’s agreements with its derivative counterparties contain provisions where if a material or adverse change occurs that materially changes the Corporation’s creditworthiness in an adverse manner, the Corporation may be required to fully collateralize its obligations under the derivative instrument.
Interest rate swap agreements generally require posting of collateral by either party under certain conditions. As of March 31, 2014 and December 31, 2013, the fair value of counterparty derivatives in a net liability position, which includes accrued interest but excludes any adjustment for non-performance risk related to these agreements, was $37,545 and $38,239, respectively. At March 31, 2014, the Corporation has posted collateral with derivative counterparties with a fair value of $35,068 and cash collateral of $3,472. At December 31, 2013, the Corporation had posted collateral with derivative counterparties with a fair value of $37,427 and cash collateral of $1,976. Additionally, if the Corporation had breached its agreements with its derivative counterparties it would be required to settle its obligations under the agreements at the termination value and would be required to pay an additional $2,199 and $2,224 as of March 31, 2014 and December 31, 2013, respectively, in excess of amounts previously posted as collateral with the respective counterparty.
The Corporation has entered into interest rate lock commitments to originate residential mortgage loans held for sale and forward commitments to sell residential mortgage loans to secondary market investors. These arrangements are considered derivative instruments. The fair values of the Corporation’s rate lock commitments to customers and commitments with investors at March 31, 2014 and December 31, 2013 are not material.

COMMITMENTS_CREDIT_RISK_AND_CO

COMMITMENTS, CREDIT RISK AND CONTINGENCIES	3 Months Ended
	Mar. 31, 2014
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 to customers and is subject to normal credit policies. Since many of these commitments expire without being drawn upon, the total commitment amounts do not necessarily represent future cash flow requirements.
	Following is a summary of off-balance sheet credit risk information:
		March 31,		December 31,
		2014		2013
	Commitments to extend credit	$	3,103,359	$	2,897,748
	Standby letters of credit		118,281		114,298
	At March 31, 2014, funding of 76.1% 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.
	The Corporation and its subsidiaries are involved in various pending and threatened 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 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

STOCK INCENTIVE PLANS	3 Months Ended
	Mar. 31, 2014
Disclosure Of Compensation Related Costs Sharebased 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 grant date fair value of the restricted stock awards is equal to the price of the Corporation’s common stock on the grant date. For the three months ended March 31, 2014, the Corporation did not issue any restricted stock awards. For the three months ended March 31, 2013, the Corporation issued 295,705 restricted stock awards with aggregate weighted average grant date fair values of $3,472, under these Plans. As of March 31, 2014, the Corporation had available up to 2,467,326 shares of common stock to issue under these Plans.
	Under the Plans, more than half of the restricted stock awards granted to management are earned if the Corporation meets or exceeds certain financial performance results when compared to its peers. These performance-related awards are expensed ratably from the date that the likelihood of meeting the performance measure is probable through the end of a four-year vesting period. The service-based awards are expensed ratably over a three-year vesting period. The Corporation also issues discretionary service-based awards to certain employees that vest over five years.
	The unvested restricted stock awards are eligible to receive cash dividends or dividend equivalents which are ultimately used to purchase additional shares of stock. Any additional shares of stock received as a result of cash dividends 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 $532 and $1,083 for the three months ended March 31, 2014 and 2013, the tax benefit of which was $186 and $379, respectively.
	The following table summarizes certain information concerning restricted stock awards:
		Three Months Ended March 31,
		2014					2013
		Awards			Weighted		Awards			Weighted
					Average					Average
					Grant					Grant
					Price					Price
	Unvested awards outstanding at beginning of period		1,729,033		$	10.23		1,913,073		$	9.17
	Granted		—			—		295,705			11.74
	Net adjustment due to performance		(19,002	)		8.48		—			—
	Vested		(667,956	)		9.01		(734,130	)		7.9
	Forfeited		(430	)		10.69		(622	)		9.23
	Dividend reinvestment		9,612			13.01		12,008			11.78
	Unvested awards outstanding at end of period		1,051,257			11.06		1,486,034			10.34
	The total fair value of awards vested was $8,631 and $8,259 for the three months ended March 31, 2014 and 2013, respectively.
	As of March 31, 2014, there was $4,159 of unrecognized compensation cost related to unvested restricted stock awards, including $56 that is subject to accelerated vesting under the Plan’s immediate vesting upon retirement provision for awards granted prior to the adoption of ASC 718, Compensation – Stock Compensation. The components of the restricted stock awards as of March 31, 2014 are as follows:
		Service-			Performance-		Total
		Based			Based
		Awards			Awards
	Unvested awards		262,189			789,068		1,051,257
	Unrecognized compensation expense	$	1,390		$	2,769	$	4,159
	Intrinsic value	$	3,516		$	10,574	$	14,090
	Weighted average remaining life (in years)		1.91			2.02		1.99
	Stock Options
	The Corporation did not grant stock options during the three months ended March 31, 2014 or 2013. All outstanding stock options were granted at prices equal to the fair market value at the date of the grant, are primarily exercisable within ten years from the date of the grant and are fully vested. 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 87,332 for the three months ended March 31, 2014. No stock options were exercised during the three months ended March 31, 2013.
	The following table summarizes certain information concerning stock option awards:
		Three Months Ended March 31,
		2014					2013
		Shares			Weighted		Shares			Weighted
					Average					Average
					Exercise					Exercise
					Price					Price
	Options outstanding at beginning of period		533,524		$	11.5		640,050		$	13.21
	Assumed from acquisition		304,785			5.77		—			—
	Exercised		(87,332	)		6.05		—			—
	Forfeited		(48,172	)		25.79		(263,589	)		14.92
	Options outstanding and exercisable at end of period		702,805			8.71		376,461			12.01
	The intrinsic value of outstanding and exercisable stock options at March 31, 2014 was $3,012.
	Warrants
	In conjunction with its participation in the UST’s CPP, the Corporation issued to the UST a warrant to purchase up to 1,302,083 shares of the Corporation’s common stock. Pursuant to Section 13(H) of the Warrant to Purchase Common Stock, the number of shares of common stock issuable upon exercise of the warrant was reduced in half to 651,042 shares on June 16, 2009, the date the Corporation completed a public offering. The warrant, which expires in 2019, has an exercise price of $11.52 per share.
	In conjunction with the Parkvale Financial Corporation (Parkvale) acquisition on January 1, 2012, the warrant issued by Parkvale to the UST under the CPP has been converted into a warrant to purchase up to 819,640 shares of the Corporation’s common stock. This warrant, which was recorded at its fair value on January 1, 2012, expires in 2018 and has an exercise price of $5.81 per share.
	In conjunction with the ANNB acquisition, 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. The warrant, which was recorded at its fair value on April 6, 2013, expires in 2019 and has an exercise price of $3.57 per share.

RETIREMENT_PLANS

RETIREMENT PLANS	3 Months Ended
	Mar. 31, 2014
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. During 2006, the Corporation amended the RIP such that effective January 1, 2007 benefits were earned based on the employee’s compensation each year. 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 Corporation amended the RIP on October 20, 2010 to be frozen effective 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 was reduced by the monthly benefit the participant receives from Social Security, the RIP, the ERISA Excess Retirement Plan and the annuity equivalent of the three percent automatic contributions to the qualified 401(k) defined contribution plan and the ERISA Excess Lost Match Plan. The BRP was frozen as of December 31, 2008. The ERISA Excess Retirement Plan was frozen as of December 31, 2010.
	The net periodic benefit cost for the defined benefit plans includes the following components:
		Three Months Ended
		March 31,
		2014			2013
	Service cost	$	16		$	18
	Interest cost		1,596			1,427
	Expected return on plan assets		(2,487	)		(2,270	)
	Amortization:
	Unrecognized net transition asset		(5	)		(23	)
	Unrecognized prior service cost (credit)		2			2
	Unrecognized loss		337			557
	Net periodic pension cost	$	(541	)	$	(289	)
	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 four percent that the employee defers. Additionally, substantially all employees receive an automatic contribution of three percent of compensation at the end of the year and the Corporation may make an additional contribution of up to two percent depending on the Corporation achieving its performance goals for the plan year. The Corporation’s contribution expense was $2,570 and $2,335 for the three months ended March 31, 2014 and 2013, 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

INCOME TAXES	3 Months Ended
	Mar. 31, 2014
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 must evaluate the probability that it will ultimately realize the full value of its deferred tax assets. Realization of the Corporation’s deferred tax assets is dependent upon a number of factors including the existence of any cumulative losses in prior periods, the amount of taxes paid in available carry-back periods, expectations for future earnings, applicable tax planning strategies and assessment of current and future economic and business conditions. The Corporation establishes a valuation allowance when it is “more likely than not” that the Corporation will not be able to realize a benefit from its deferred tax assets, or when future deductibility is uncertain.
	At March 31, 2014, the Corporation anticipates that it will not utilize state net operating loss carryforwards and other net deferred tax assets at certain of its subsidiaries and has recorded a valuation allowance against the state deferred tax assets. The Corporation believes that, except for the portion which is covered by the valuation allowance, it is more likely than not the Corporation will realize the benefits of its deferred tax assets, net of the valuation allowance, at March 31, 2014, based on the level of historical taxable income and taxes paid in available carry-back periods.

COMPREHENSIVE_INCOME

COMPREHENSIVE INCOME	3 Months Ended
	Mar. 31, 2014
Equity [Abstract]	'
COMPREHENSIVE INCOME	'
	COMPREHENSIVE INCOME
	The components of comprehensive income, net of related tax, are as follows:
			Three Months Ended
			March 31,
			2014			2013
	Net income		$	34,524		$	28,538
	Other comprehensive income (loss):
	Securities available for sale:
	Unrealized gains (losses) arising during the period, net of tax expense (benefit) of $5,681 and $(99)			10,550			(184	)
	Reversal of non-credit related losses on debt securities not expected to be sold, net of tax expense of $3,335			6,192			—
	Reclassification adjustment for gains included in net income, net of tax expense of $3,311 and $239			(6,150	)		(445	)
	Derivative instruments:
	Unrealized gains (losses) arising during the period, net of tax expense (benefit) of $1,117 and $(373)			2,074			(694	)
	Pension and postretirement benefit obligations:
	Unrealized gains arising during the period, net of tax expense of $117 and $188			217			349
	Other comprehensive income (loss)			12,883			(974	)
	Comprehensive income		$	47,407		$	27,564
	The following table presents changes in accumulated other comprehensive income, net of tax, by component:
			Unrealized			Non-Credit			Unrealized			Unrecognized			Total
			Net Gains			Related Loss			Losses on			Pension and
			(Losses) on			on Debt			Derivative			Postretirement
			Securities			Securities not			Instruments			Obligations
			Available			Expected  to
			for Sale			be Sold
	Three Months Ended March 31, 2014
	Balance at beginning of period		$	(11,874	)	$	(6,192	)	$	(6,586	)	$	(32,272	)	$	(56,924	)
	Other comprehensive income (loss) before reclassifications			10,550			6,192			2,074			217			19,033
	Amounts reclassified from accumulated other comprehensive income			(6,150	)		—			—			—			(6,150	)
	Net current period other comprehensive income (loss)			4,400			6,192			2,074			217			12,883
	Balance at end of period		$	(7,474	)	$	—		$	(4,512	)	$	(32,055	)	$	(44,041	)
	The following table presents a summary of the reclassifications out of accumulated other comprehensive income:
	Three Months Ended March 31, 2014
	Details About Accumulated Other		Amount			Affected Line Item
	Comprehensive Income Component		Reclassified from			in the Statement
			Other			where Net Income
			Comprehensive			is Presented
			Income
	Unrealized net gains on securities available for sale (1)		$	(9,461	)	Net securities gains
				(3,311	)	Tax expense
			$	(6,150	)
	-1	For additional detail related to unrealized net gains on securities available for sale and related amounts reclassified from accumulated other comprehensive income see the “Securities” note in this Report.

EARNINGS_PER_COMMON_SHARE

EARNINGS PER COMMON SHARE	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]	'
EARNINGS PER COMMON SHARE	'
	EARNINGS PER COMMON SHARE
	Basic earnings per common share is calculated by dividing net income available to common stockholders by the weighted average number of shares of common stock outstanding net of unvested shares of restricted stock.
	Diluted earnings per common share is calculated by dividing net income available to common stockholders by the weighted average number of shares of common stock outstanding, adjusted for the dilutive effect of potential common shares issuable for stock options, warrants and restricted shares, as calculated using the treasury stock method. Adjustments to the weighted average number of shares of common stock outstanding are made only when such adjustments dilute earnings per common share.
	The following table sets forth the computation of basic and diluted earnings per common share:
		Three Months Ended
		March 31,
		2014		2013
	Net income	$	34,524	$	28,538
	Preferred stock dividends		2,322		—
	Net income available to common stockholders	$	32,202	$	28,538
	Basic weighted average common shares outstanding		162,186,395		139,650,495
	Net effect of dilutive stock options, warrants, restricted stock and convertible debt		1,780,851		1,415,695
	Diluted weighted average common shares outstanding		163,967,246		141,066,190
	Earnings per common share:
	Basic	$	0.2	$	0.2
	Diluted	$	0.2	$	0.2
	For the three months ended March 31, 2014 and 2013, 51,641 and 71,555 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

CASH FLOW INFORMATION	3 Months Ended
	Mar. 31, 2014
Supplemental Cash Flow Elements [Abstract]	'
CASH FLOW INFORMATION	'
	CASH FLOW INFORMATION
	Following is a summary of supplemental cash flow information:
	Three Months Ended March 31	2014		2013
	Interest paid on deposits and other borrowings	$	10,576	$	13,489
	Income taxes paid		—		—
	Transfers of loans to other real estate owned		4,849		3,271
	Financing of other real estate owned sold		—		113

BUSINESS_SEGMENTS

BUSINESS SEGMENTS	3 Months Ended
	Mar. 31, 2014
Segment Reporting [Abstract]	'
BUSINESS SEGMENTS	'
	BUSINESS SEGMENTS
	The Corporation operates in four reportable segments: Community Banking, Wealth Management, Insurance and Consumer Finance.
		•		The Community Banking segment provides commercial and consumer banking services. Commercial banking solutions include corporate banking, small business banking, investment real estate financing, asset based lending, capital markets and lease financing. Consumer banking products and services include deposit products, mortgage lending, consumer lending and a complete suite of mobile and online banking services.
		•		The Wealth Management segment provides a broad range of personal and corporate fiduciary services including the administration of decedent and trust estates. In addition, it offers various alternative products, including securities brokerage and investment advisory services, mutual funds and annuities.
		•		The Insurance segment includes a full-service insurance agency offering all lines of commercial and personal insurance through major carriers. The Insurance segment also includes a reinsurer.
		•		The Consumer Finance segment primarily makes installment loans to individuals and purchases installment sales finance contracts from retail merchants. The Consumer Finance segment activity is funded through the sale of the Corporation’s subordinated notes at the finance company’s branch offices.
	The following tables provide financial information for these segments of the Corporation. The information provided under the caption “Parent and Other” represents operations not considered to be reportable segments and/or general operating expenses of the Corporation, and includes the parent company, other non-bank subsidiaries and eliminations and adjustments which are necessary for purposes of reconciliation to the consolidated amounts.
			Community		Wealth		Insurance		Consumer		Parent			Consolidated
			Banking		Management				Finance		and Other
	At or for the Three Months Ended March 31, 2014
	Interest income		$	106,691	$	—	$	25	$	9,365	$	1,799		$	117,880
	Interest expense			8,248		—		—		846		961			10,055
	Net interest income			98,443		—		25		8,519		838			107,825
	Provision for loan losses			5,296		—		—		1,457		253			7,006
	Non-interest income			31,913		7,323		4,210		660		(2,036	)		42,070
	Non-interest expense			76,866		6,292		3,046		4,937		742			91,883
	Intangible amortization			2,110		72		101		—		—			2,283
	Income tax expense (benefit)			13,343		351		385		1,073		(953	)		14,199
	Net income (loss)			32,741		608		703		1,712		(1,240	)		34,524
	Total assets			14,299,543		19,542		19,954		182,018		(44,547	)		14,476,510
	Total intangibles			833,642		10,936		10,425		1,809		—			856,812
	At or for the Three Months Ended March 31, 2013
	Interest income		$	94,051	$	—	$	28	$	9,016	$	2,023		$	105,118
	Interest expense			8,918		—		—		856		2,248			12,022
	Net interest income			85,133		—		28		8,160		(225	)		93,096
	Provision for loan losses			5,820		—		—		1,527		194			7,541
	Non-interest income			23,698		7,115		3,559		629		(1,389	)		33,612
	Non-interest expense			62,968		6,086		2,811		4,516		496			76,877
	Intangible amortization			1,748		76		101		—		—			1,925
	Income tax expense (benefit)			11,172		350		239		1,048		(982	)		11,827
	Net income (loss)			27,123		603		436		1,698		(1,322	)		28,538
	Total assets			11,816,414		18,520		19,141		175,710		(31,795	)		11,997,990
	Total intangibles			687,545		11,236		10,830		1,809		—			711,420

FAIR_VALUE_MEASUREMENTS

FAIR VALUE MEASUREMENTS	3 Months Ended
	Mar. 31, 2014
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	Definition
	Category
	Level 1	valuation is based upon unadjusted quoted market prices for identical instruments traded in active
		markets.
	Level 2	valuation is based upon quoted market prices for similar instruments traded in active markets,
		quoted market prices for identical or similar instruments traded in markets that are not active
		and model-based valuation techniques for which all significant assumptions are observable in
		the market or can be corroborated by market data.
	Level 3	valuation is derived from other valuation methodologies including discounted cash flow models
		and similar techniques that use significant assumptions not observable in the market. These
		unobservable assumptions reflect estimates of assumptions that market participants would
		use in determining fair value.
	A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement.
	Following is a description of the valuation methodologies the Corporation uses for financial instruments recorded at fair value on either a recurring or non-recurring basis:
	Securities Available For Sale
	Securities available for sale consists of both debt and equity securities. These securities are recorded at fair value on a recurring basis. At March 31, 2014, 99.8% 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 0.2% of these securities were 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 by Corporate personnel familiar with market liquidity and other market-related conditions.
	Derivative Financial Instruments
	The Corporation determines its fair value for derivatives using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects contractual terms of the derivative, including the period to maturity and uses observable market based inputs, including interest rate curves and implied volatilities.
	The Corporation incorporates credit valuation adjustments to appropriately reflect both its own non-performance risk and the respective counterparty’s non-performance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of non-performance risk, the Corporation considers the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts and guarantees.
	Although the Corporation has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by itself and its counterparties. However, as of March 31, 2014, 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 value of real estate based on appraisals by licensed or certified appraisers. The value of business assets is generally based on amounts reported on the business’ financial statements. Management must rely on the financial statements prepared and certified by the borrower or its accountants in determining the value of these business assets on an ongoing basis which may be subject to significant change over time. Based on the quality of information or statements provided, management may require the use of business asset appraisals and site-inspections to better value these assets. The Corporation may discount appraised and reported values based on management’s historical knowledge, changes in market conditions from the time of valuation or management’s knowledge of the borrower and the borrower’s business. Since not all valuation inputs are observable, the Corporation classifies these non-recurring fair value determinations as Level 2 or Level 3 based on the lowest level of input that is significant to the fair value measurement.
	The Corporation reviews and evaluates impaired loans no less frequently than quarterly for additional impairment based on the same factors identified above.
	Other Real Estate Owned
	OREO is comprised of commercial and residential real estate properties obtained in partial or total satisfaction of loan obligations plus some bank owned real estate. OREO acquired in settlement of indebtedness is recorded at the lower of carrying amount of the loan or fair value less costs to sell. Subsequently, these assets are carried at the lower of carrying value or fair value less costs to sell. Accordingly, it may be necessary to record non-recurring fair value adjustments. Fair value is generally based upon appraisals by licensed or certified appraisers and other market information and is classified as Level 2 or Level 3.
	The following table presents the balances of assets and liabilities measured at fair value on a recurring basis:
		Level 1			Level 2			Level 3			Total
	March 31, 2014
	Assets measured at fair value
	Available for sale debt securities:
	U.S. government-sponsored entities	$	—		$	264,681		$	—		$	264,681
	Residential mortgage-backed securities
	Agency mortgage-backed securities		—			355,941			—			355,941
	Agency collateralized mortgage obligations		—			609,752			—			609,752
	Non-agency collateralized mortgage obligations		—			16			1,663			1,679
	Commercial mortgage-backed securities		—			9,129			—			9,129
	States of the U.S. and political subdivisions		—			14,505			—			14,505
	Other debt securities		—			16,240			—			16,240
			—			1,270,264			1,663			1,271,927
	Available for sale equity securities:
	Financial services industry		558			1,106			414			2,078
	Insurance services industry		65			—			—			65
			623			1,106			414			2,143
			623			1,271,370			2,077			1,274,070
	Derivative financial instruments:
	Trading		—			33,173			—			33,173
	Not for trading		—			119			—			119
			—			33,292			—			33,292
		$	623		$	1,304,662		$	2,077		$	1,307,362
	Liabilities measured at fair value
	Derivative financial instruments:
	Trading		—		$	33,105			—		$	33,105
	Not for trading		—			7,060			—			7,060
		—		$	40,165			—		$	40,165
	Level 1			Level 2			Level 3			Total
December 31, 2013
Assets measured at fair value
Available for sale debt securities:
U.S. government-sponsored entities	$	—		$	330,985		$	—		$	330,985
Residential mortgage-backed securities
Agency mortgage-backed securities		—			250,881			—			250,881
Agency collateralized mortgage obligations		—			491,199			—			491,199
Non-agency collateralized mortgage obligations		—			18			1,744			1,762
States of the U.S. and political subdivisions		—			17,002			—			17,002
Collateralized debt obligations		—			—			31,595			31,595
Other debt securities		—			16,100			—			16,100
		—			1,106,185			33,339			1,139,524
Available for sale equity securities:
Financial services industry		584			1,067			410			2,061
Insurance services industry		65			—			—			65
		649			1,067			410			2,126
		649			1,107,252			33,749			1,141,650
Derivative financial instruments:
Trading		—			33,317			—			33,317
Not for trading		—			—			—			—
		—			33,317			—			33,317
	$	649		$	1,140,569		$	33,749		$	1,174,967
Liabilities measured at fair value
Derivative financial instruments:
Trading		—		$	33,236			—		$	33,236
Not for trading		—			10,133			—			10,133
		—		$	43,369			—		$	43,369
There were no transfers of assets or liabilities between the hierarchy levels for 2014. During 2013, the Corporation transferred out of Level 2 and Level 3 equity securities that now trade on NASDAQ. At December 31, 2013, the securities are classified as Level 1. Additionally during 2013, the Corporation transferred out of Level 3 and into Level 2 four single name TPS.
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			Other			Equity			Residential			Total
	Preferred			Debt			Securities			Non-Agency
	Collateralized			Securities						Collateralized
	Debt									Mortgage
	Obligations									Obligations
Three Months Ended March 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			—			4			4			5,616
Accretion included in earnings		657			—			—			1			658
Purchases, issuances, sales and settlements:
Purchases		—			—			—			—			—
Issuances		—			—			—			—			—
Sales/redemptions		(51,527	)		—			—			—			(51,527	)
Settlements		(99	)		—			—			(86	)		(185	)
Transfers from Level 3		—			—			—			—			—
Transfers into Level 3		—			—			—			—			—
Balance at end of period	$	—			—		$	414		$	1,663		$	2,077
Year Ended December 31, 2013
Balance at beginning of period	$	22,456		$	6,892		$	512		$	2,705		$	32,565
Total gains (losses) – realized/unrealized:
Included in earnings		—			78			—			—			78
Included in other comprehensive income		6,701			21			18			(35	)		6,705
Accretion included in earnings		3,160			4			—			12			3,176
Purchases, issuances, sales and settlements:
Purchases		—			—			—			—			—
Issuances		38			—			—			—			38
Sales/redemptions		—			(1,033	)		—			—			(1,033	)
Settlements		(760	)		—			—			(938	)		(1,698	)
Transfers from Level 3		—			(5,962	)		(120	)		—			(6,082	)
Transfers into Level 3		—			—			—			—			—
Balance at end of period	$	31,595		$	—		$	410		$	1,744		$	33,749
The Corporation reviews fair value hierarchy classifications on a quarterly basis. Changes in the observability of the valuation attributes may result in reclassification of certain financial assets or liabilities. Such reclassifications are reported as transfers in/out of Level 3 at fair value at the beginning of the period in which the changes occur. See the Securities footnote in the Notes to Consolidated Financial Statements section of this Report for information relating to significant unobservable inputs used in determining Level 3 fair values.
For the three months ended March 31, 2014 and 2013, 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 gains included in earnings are in the net securities gains line item in the Consolidated Statements of Comprehensive Income.
In accordance with GAAP, from time to time, the Corporation measures certain assets at fair value on a non-recurring basis. These adjustments to fair value usually result from the application of the lower of cost or fair value accounting or write-downs of individual assets. Valuation methodologies used to measure these fair value adjustments were previously described. For assets measured at fair value on a non-recurring basis still held at the balance sheet date, the following table provides the hierarchy level and the fair value of the related assets or portfolios:
	Level 1			Level 2			Level 3			Total
March 31, 2014
Impaired loans		—		$	9,422		$	—		$	9,422
Other real estate owned		—			1,373			3,286			4,659
December 31, 2013
Impaired loans		—		$	3,235		$	59		$	3,294
Other real estate owned		—			4,485			14,957			19,442
Impaired loans measured or re-measured at fair value on a non-recurring basis during the three months ended March 31, 2014 had a carrying amount of $9,525 and an allocated allowance for loan losses of $1,268 at March 31, 2014. The allocated allowance is based on fair value of $9,422 less estimated costs to sell of $1,165. The allowance for loan losses includes a provision applicable to the current period fair value measurements of $622, which was included in the provision for loan losses for the three months ended March 31, 2014.
OREO with a carrying amount of $4,946 was written down to $4,099 (fair value of $4,659 less estimated costs to sell of $560), resulting in a loss of $847, which was included in earnings for the three months ended March 31, 2014.
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. The fair value of fixed rate loans is estimated by discounting the future cash flows using the current rates at which similar loans 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 approximates the carrying amount. Due to the significant judgment involved in evaluating credit quality, loans are classified within Level 3 of the fair value hierarchy.
Bank Owned Life Insurance. The Corporation owns general account, separate account and hybrid account bank owned life insurance (BOLI). The fair value of the general account BOLI is based on the insurance contract cash surrender value. The separate account BOLI has a stable value protection (SVP) component that mitigates the impact of market value fluctuations of the underlying account assets. The SVP component guarantees the book value, which is the insurance contract cash surrender value. The hybrid account BOLI also has a guaranteed book value, except it does not require a stable value protection component. Instead, the insurance carrier incurs the investment return risk, which is imbedded in their fee structure.
If the Corporation’s separate account and hybrid account BOLI book value exceeds the market value of the underlying securities, then the fair value of the separate account and hybrid account BOLI is the cash surrender value. If the Corporation’s separate account and hybrid account BOLI book value is less than the market value of the underlying securities, then the fair value of the separate account and hybrid account BOLI is the quoted market price of the underlying securities.
Derivative Assets and Liabilities. The Corporation determines its fair value for derivatives using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects contractual terms of the derivative, including the period to maturity and uses observable market based inputs, including interest rate curves and implied volatilities.
The Corporation incorporates credit valuation adjustments to appropriately reflect both its own non-performance risk and the respective counterparty’s non-performance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of non-performance risk, the Corporation considers the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts and guarantees.
Although the Corporation has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by itself and its counterparties. However, as of March 31, 2014, 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 and Junior Subordinated Debt. The fair value of long-term and junior subordinated debt 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			Fair Value Measurements
	Amount			Value			Level 1			Level 2			Level 3
March 31, 2014
Financial Assets
Cash and cash equivalents	$	246,253		$	246,253		$	246,253		$	—		$	—
Securities available for sale		1,274,070			1,274,070			623			1,271,370			2,077
Securities held to maturity		1,420,446			1,418,994			—			1,412,618			6,376
Net loans, including loans held for sale		9,834,857			9,668,159			—			—			9,668,159
Bank owned life insurance		307,872			312,290			312,290			—			—
Derivative assets		33,292			33,292			—			33,292			—
Accrued interest receivable		37,199			37,199			37,199			—			—
Financial Liabilities
Deposits		10,938,736			10,948,821			8,161,249			2,787,572			—
Short-term borrowings		1,216,624			1,216,624			1,216,624			—			—
Long-term debt		235,752			238,381			—			—			238,381
Junior subordinated debt		68,517			69,465			—			—			69,465
Derivative liabilities		40,165			40,165			—			40,165			—
Accrued interest payable		6,539			6,539			6,539			—			—
December 31, 2013
Financial Assets
Cash and cash equivalents	$	213,981		$	213,981		$	213,981		$	—		$	—
Securities available for sale		1,141,650			1,141,650			649			1,107,252			33,749
Securities held to maturity		1,199,169			1,189,563			—			1,182,671			6,892
Net loans, including loans held for sale		9,402,448			9,243,780			—			—			9,243,780
Bank owned life insurance		289,402			292,694			292,694			—			—
Derivative assets		33,317			33,317			—			33,317			—
Accrued interest receivable		35,520			35,520			35,520			—			—
Financial Liabilities
Deposits		10,198,232			10,208,268			7,592,159			2,616,109			—
Short-term borrowings		1,241,239			1,241,239			1,241,239			—			—
Long-term debt		143,928			145,995			—			—			145,995
Junior subordinated debt		75,205			70,442			—			—			70,442
Derivative liabilities		43,369			43,369			—			43,369			—
Accrued interest payable		7,061			7,061			7,061			—			—

NEW_ACCOUNTING_STANDARDS_Polic

NEW ACCOUNTING STANDARDS (Policies)	3 Months Ended
	Mar. 31, 2014
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]	'
Troubled Debt Restructurings	'
	Troubled Debt Restructurings
	In January 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2014-04, Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure, to clarify when an in-substance repossession or foreclosure occurs; that is, when a creditor should be considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan such that the loan should be derecognized and other real estate owned (OREO) recognized. This update requires a creditor to reclassify a collateralized consumer mortgage loan to OREO upon obtaining legal title to the real estate collateral, or the borrower voluntarily conveying all interest in the real estate property to the lender to satisfy the loan through a deed in lieu of foreclosure or similar legal agreement. The requirements of ASU 2014-04 are effective for reporting periods beginning after December 15, 2014. The adoption of this update will not have an impact on the financial statements, results of operations or liquidity of the Corporation since the Corporation already accounts for foreclosures according to the requirements of this update.
Investments in Qualified Affordable Housing Projects	'
	Investments in Qualified Affordable Housing Projects
	In January 2014, the FASB issued ASU No. 2014-01, Accounting for Investments in Qualified Affordable Housing Projects, to revise the accounting for investments in qualified affordable housing projects. This update modifies the conditions that must be met to present the pretax effects and related tax benefits of such investments as a component of income taxes (“net” within income tax expense). It is expected that the new guidance will enable more investors to use a “net” presentation for investments in qualified affordable housing projects. Investors that do not qualify for “net” presentation under the new guidance will continue to account for such investments under the equity method or cost method, which results in losses recognized in pretax income and tax benefits recognized in income taxes (“gross” presentation of investment results). For investments that qualify for the “net” presentation of investment performance, the guidance introduces a “proportional amortization method” that can be elected to amortize the investment basis. If elected, the method is required for all eligible investments in qualified affordable housing projects. The requirements of ASU 2014-01 are effective for reporting periods beginning after December 15, 2014, 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.
Income Taxes	'
	Income Taxes
	In July 2013, the FASB issued ASU No. 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists, to provide guidance on the financial statement presentation of certain unrecognized tax benefits. An unrecognized tax benefit or a portion of an unrecognized tax benefit should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss or a tax credit carryforward with certain exceptions related to availability. The requirements of ASU 2013-11 are effective prospectively for reporting periods beginning after December 15, 2013, with early adoption permitted. The adoption of this update did not have a material effect on the financial statements, results of operations or liquidity of the Corporation.

SECURITIES_Tables

SECURITIES (Tables)	3 Months Ended
	Mar. 31, 2014
Text Block [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			Gross			Gross			Fair Value
		Cost			Unrealized			Unrealized
					Gains			Losses
	Securities Available for Sale:
	March 31, 2014
	U.S. government-sponsored entities	$	268,330		$	50		$	(3,699	)	$	264,681
	Residential mortgage-backed securities:
	Agency mortgage-backed securities		352,209			4,637			(905	)		355,941
	Agency collateralized mortgage obligations		622,060			1,335			(13,643	)		609,752
	Non-agency collateralized mortgage obligations		1,661			18			—			1,679
	Commercial mortgage-backed securities		9,153			—			(24	)		9,129
	States of the U.S. and political subdivisions		14,216			438			(149	)		14,505
	Other debt securities		16,532			569			(861	)		16,240
	Total debt securities		1,284,161			7,047			(19,281	)		1,271,927
	Equity securities		1,444			699			—			2,143
		$	1,285,605		$	7,746		$	(19,281	)	$	1,274,070
	December 31, 2013
	U.S. government-sponsored entities	$	336,763		$	126		$	(5,904	)	$	330,985
	Residential mortgage-backed securities:
	Agency mortgage-backed securities		247,880			4,304			(1,303	)		250,881
	Agency collateralized mortgage obligations		511,098			895			(20,794	)		491,199
	Non-agency collateralized mortgage obligations		1,747			15			—			1,762
	States of the U.S. and political subdivisions		16,842			410			(250	)		17,002
	Collateralized debt obligations		37,203			4,507			(10,115	)		31,595
	Other debt securities		16,505			524			(929	)		16,100
	Total debt securities		1,168,038			10,781			(39,295	)		1,139,524
	Equity securities		1,444			682			—			2,126
		$	1,169,482		$	11,463		$	(39,295	)	$	1,141,650
Schedule of Amortized Cost and Fair Value of Securities Held to Maturity	'
		Amortized			Gross			Gross			Fair Value
		Cost			Unrealized			Unrealized
					Gains			Losses
	Securities Available for Sale:
	March 31, 2014
	U.S. government-sponsored entities	$	268,330		$	50		$	(3,699	)	$	264,681
	Residential mortgage-backed securities:
	Agency mortgage-backed securities		352,209			4,637			(905	)		355,941
	Agency collateralized mortgage obligations		622,060			1,335			(13,643	)		609,752
	Non-agency collateralized mortgage obligations		1,661			18			—			1,679
	Commercial mortgage-backed securities		9,153			—			(24	)		9,129
	States of the U.S. and political subdivisions		14,216			438			(149	)		14,505
	Other debt securities		16,532			569			(861	)		16,240
	Total debt securities		1,284,161			7,047			(19,281	)		1,271,927
	Equity securities		1,444			699			—			2,143
		$	1,285,605		$	7,746		$	(19,281	)	$	1,274,070
	December 31, 2013
	U.S. government-sponsored entities	$	336,763		$	126		$	(5,904	)	$	330,985
	Residential mortgage-backed securities:
	Agency mortgage-backed securities		247,880			4,304			(1,303	)		250,881
	Agency collateralized mortgage obligations		511,098			895			(20,794	)		491,199
	Non-agency collateralized mortgage obligations		1,747			15			—			1,762
	States of the U.S. and political subdivisions		16,842			410			(250	)		17,002
	Collateralized debt obligations		37,203			4,507			(10,115	)		31,595
	Other debt securities		16,505			524			(929	)		16,100
	Total debt securities		1,168,038			10,781			(39,295	)		1,139,524
	Equity securities		1,444			682			—			2,126
		$	1,169,482		$	11,463		$	(39,295	)	$	1,141,650
	Securities Held to Maturity:
	March 31, 2014
	U.S. Treasury	$	502		$	123		$	—		$	625
	U.S. government-sponsored entities		101,787			181			(1,284	)		100,684
	Residential mortgage-backed securities:
	Agency mortgage-backed securities		725,154			12,529			(3,817	)		733,866
	Agency collateralized mortgage obligations		452,909			1,225			(11,976	)		442,158
	Non-agency collateralized mortgage obligations		6,352			24			—			6,376
	Commercial mortgage-backed securities		2,236			121			(15	)		2,342
	States of the U.S. and political subdivisions		131,506			2,392			(955	)		132,943
		$	1,420,446		$	16,595		$	(18,047	)	$	1,418,994
	December 31, 2013
	U.S. Treasury	$	503		$	99		$	—		$	602
	U.S. government-sponsored entities		43,322			180			(1,151	)		42,351
	Residential mortgage-backed securities:
	Agency mortgage-backed securities		628,681			12,281			(6,032	)		634,930
	Agency collateralized mortgage obligations		385,408			764			(15,844	)		370,328
	Non-agency collateralized mortgage obligations		6,852			44			(4	)		6,892
	Commercial mortgage-backed securities		2,241			124			(37	)		2,328
	States of the U.S. and political subdivisions		132,162			1,992			(2,022	)		132,132
		$	1,199,169		$	15,484		$	(25,090	)	$	1,189,563
Gross Gains and Gross Losses Realized on Sales of Securities	'
	Gross gains and gross losses were realized on securities as follows:
		Three Months Ended
		March 31,
		2014			2013
	Gross gains	$	18,009		$	1,032
	Gross losses		(8,548	)		(348	)
		$	9,461		$	684
Amortized Cost and Fair Value of Securities, by Contractual Maturities	'
	As of March 31, 2014, the amortized cost and fair value of securities, by contractual maturities, were as follows:
		Available for Sale						Held to Maturity
		Amortized			Fair			Amortized			Fair
		Cost			Value			Cost			Value
	Due in one year or less	$	—		$	—		$	2,716		$	2,766
	Due from one to five years		209,466			207,689			77,526			76,567
	Due from five to ten years		82,024			80,998			85,763			86,428
	Due after ten years		7,588			6,739			67,790			68,491
			299,078			295,426			233,795			234,252
	Residential mortgage-backed securities:
	Agency mortgage-backed securities		352,209			355,941			725,154			733,866
	Agency collateralized mortgage obligations		622,060			609,752			452,909			442,158
	Non-agency collateralized mortgage obligations		1,661			1,679			6,352			6,376
	Commercial mortgage-backed securities		9,153			9,129			2,236			2,342
	Equity securities		1,444			2,143			—			—
		$	1,285,605		$	1,274,070		$	1,420,446		$	1,418,994
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			Unrealized			#			Fair		Unrealized			#		Fair		Unrealized
					Value			Losses						Value		Losses					Value		Losses
	Securities Available for Sale:
	March 31, 2014
	U.S. government-sponsored entities		18		$	249,631		$	(3,699	)		—		$	—	$	—			18	$	249,631	$	(3,699	)
	Residential mortgage-backed securities:
	Agency mortgage-backed securities		11			177,722			(905	)		—			—		—			11		177,722		(905	)
	Agency collateralized mortgage obligations		24			398,335			(9,937	)		4			68,266		(3,706	)		28		466,601		(13,643	)
	Commercial mortgage-backed securities		1			9,129			(24	)		—			—		—			1		9,129		(24	)
	States of the U.S. and political subdivisions		2			3,123			(149	)		—			—		—			2		3,123		(149	)
	Other debt securities		—			—			—			4			6,020		(861	)		4		6,020		(861	)
			56		$	837,940		$	(14,714	)		8		$	74,286	$	(4,567	)		64	$	912,226	$	(19,281	)
	December 31, 2013
	U.S. government-sponsored entities		17		$	232,962		$	(5,904	)		—		$	—	$	—			17	$	232,962	$	(5,904	)
	Residential mortgage-backed securities:
	Agency mortgage-backed securities		9			108,284			(1,303	)		—			—		—			9		108,284		(1,303	)
	Agency collateralized mortgage		26			389,989			(18,644	)		2			34,229		(2,150	)		28		424,218		(20,794	)
	obligations
	States of the U.S. and political subdivisions		2			3,022			(250	)		—			—		—			2		3,022		(250	)
	Collateralized debt obligations		—			—			—			8			7,965		(10,115	)		8		7,965		(10,115	)
	Other debt securities		—			—			—			4			5,950		(929	)		4		5,950		(929	)
			54		$	734,257		$	(26,101	)		14		$	48,144	$	(13,194	)		68	$	782,401	$	(39,295	)
	Securities Held to Maturity:
	March 31, 2014
	U.S. government-sponsored entities		7		$	73,748		$	(788	)		1		$	14,504	$	(496	)		8	$	88,252	$	(1,284	)
	Residential mortgage-backed securities:
	Agency mortgage-backed securities		23			347,721			(3,745	)		1			1,304		(72	)		24		349,025		(3,817	)
	Agency collateralized mortgage obligations		20			249,082			(8,442	)		4			66,850		(3,534	)		24		315,932		(11,976	)
	Commercial mortgage-backed securities		1			1,005			(15	)		—			—		—			1		1,005		(15	)
	States of the U.S. and political subdivisions		21			27,262			(955	)		—			—		—			21		27,262		(955	)
			72		$	698,818		$	(13,945	)		6		$	82,658	$	(4,102	)		78	$	781,476	$	(18,047	)
	December 31, 2013
	U.S. government-sponsored entities		2		$	24,513		$	(530	)		1		$	14,378	$	(621	)		3	$	38,891	$	(1,151	)
	Residential mortgage-backed securities:
	Agency mortgage-backed securities		24			308,864			(5,942	)		1			1,296		(90	)		25		310,160		(6,032	)
	Agency collateralized mortgage obligations		21			301,312			(15,844	)		—			—		—			21		301,312		(15,844	)
	Non-agency collateralized mortgage obligations		3			2,010			(4	)		—			—		—			3		2,010		(4	)
	Commercial mortgage-backed securities		1			984			(37	)		—			—		—			1		984		(37	)
	States of the U.S. and political subdivisions		27			31,537			(2,022	)		—			—		—			27		31,537		(2,022	)
			78		$	669,220		$	(24,379	)		2		$	15,674	$	(711	)		80	$	684,894	$	(25,090	)
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			Residential			Equities			Total
		Debt			Non-Agency
		Obligations			CMOs
	For the Three Months Ended March 31, 2014
	Beginning balance	$	17,155		$	—		$	27		$	17,182
	Loss where impairment was not previously recognized		—			—			—			—
	Additional loss where impairment was previously recognized		—			—			—			—
	Reduction due to credit impaired securities sold		(17,155	)		—			—			(17,155	)
	Ending balance	$	—		$	—		$	27		$	27
	For the Three Months Ended March 31, 2013
	Beginning balance	$	17,155		$	212			—		$	17,367
	Loss where impairment was not previously recognized		—			—			—			—
	Additional loss where impairment was previously recognized		—			—			—			—
	Reduction due to credit impaired securities sold		—			(212	)		—			(212	)
	Ending balance	$	17,155		$	—			—		$	17,155

LOANS_AND_ALLOWANCE_FOR_LOAN_L1

LOANS AND ALLOWANCE FOR LOAN LOSSES (Tables)	3 Months Ended
	Mar. 31, 2014
Receivables [Abstract]	'
Summary of Loans, Net of Unearned Income	'
	Following is a summary of loans, net of unearned income:
			Originated			Acquired			Total
			Loans			Loans			Loans
	March 31, 2014
	Commercial real estate		$	2,677,152		$	787,446		$	3,464,598
	Commercial and industrial			1,848,332			116,733			1,965,065
	Commercial leases			161,494			—			161,494
	Total commercial loans and leases			4,686,978			904,179			5,591,157
	Direct installment			1,386,940			80,618			1,467,558
	Residential mortgages			688,038			447,752			1,135,790
	Indirect installment			674,347			4,571			678,918
	Consumer lines of credit			848,883			161,618			1,010,501
	Other			59,212			—			59,212
			$	8,344,398			1,598,738		$	9,943,136
	December 31, 2013
	Commercial real estate		$	2,640,428		$	604,781		$	3,245,209
	Commercial and industrial			1,761,668			119,806			1,881,474
	Commercial leases			158,895			—			158,895
	Total commercial loans and leases			4,560,991			724,587			5,285,578
	Direct installment			1,387,995			79,241			1,467,236
	Residential mortgages			678,227			408,512			1,086,739
	Indirect installment			649,701			5,886			655,587
	Consumer lines of credit			832,668			133,103			965,771
	Other			45,183			—			45,183
			$	8,154,765		$	1,351,329		$	9,506,094
Carrying Amounts at Acquisition of All Purchased Loans (Impaired and Non-Impaired) Acquired	'
	The following table reflects amounts at acquisition for all purchased loans subject to ASC 310-30 (impaired and non-impaired) acquired from PVF and ANNB in 2013. ASC 310-30 (impaired and non-impaired) loans acquired from BCSB in 2014 are not presented because their values are expected to be immaterial, are preliminary in nature and are subject to refinement as additional information becomes available.
			Acquired			Acquired			Total
			Impaired			Performing
			Loans			Loans
	Acquired from PVF and ANNB in 2013
	Contractually required cash flows at acquisition		$	40,972		$	796,114		$	837,086
	Non-accretable difference (expected losses and foregone interest)			(23,207	)		(52,992	)		(76,199	)
	Cash flows expected to be collected at acquisition			17,765			743,122			760,887
	Accretable yield			(2,505	)		(112,847	)		(115,352	)
	Basis in acquired loans at acquisition		$	15,260		$	630,275		$	645,535
Summary of Change in Accretable Yield of Acquired Loans	'
	The following table provides a summary of change in accretable yield for all acquired loans, excluding loans from the BCSB acquisition.
			Acquired			Acquired			Total
			Impaired			Performing
			Loans			Loans
	Three Months Ended March 31, 2014
	Balance at beginning of period		$	7,456		$	298,190		$	305,646
	Acquisitions			—			—			—
	Reduction due to unexpected early payoffs			—			(12,694	)		(12,694	)
	Reclass from non-accretable difference			332			436			768
	Disposals/transfers			(759	)		(185	)		(944	)
	Accretion			(1,264	)		(14,649	)		(15,913	)
	Balance at end of period		$	5,765		$	271,098		$	276,863
	Year Ended December 31, 2013
	Balance at beginning of period		$	778		$	253,375		$	254,153
	Acquisitions			2,505			112,847			115,352
	Reduction due to unexpected early payoffs			—			(42,582	)		(42,582	)
	Reclass from non-accretable difference			8,097			8,296			16,393
	Disposals/transfers			(368	)		(224	)		(592	)
	Accretion			(3,556	)		(33,522	)		(37,078	)
	Balance at end of period		$	7,456		$	298,190		$	305,646
Summary of Information about Corporation's Purchased Credit-Impaired Loans	'
	Following is information about PCI loans. The table below does not include impaired loans from the BCSB acquisition because their values are expected to be immaterial, are preliminary in nature and are subject to refinement as additional information becomes available.
			Outstanding			Non-Accretable			Expected			Accretable			Recorded
			Balance			Difference			Cash Flows			Yield			Investment
	For the Three Months Ended March 31, 2014
	Balance at beginning of period		$	56,500		$	(26,852	)	$	29,648		$	(7,456	)	$	22,192
	Acquisitions			—			—			—			—			—
	Accretion			—			—			—			1,264			1,264
	Payments received			(8,040	)		437			(7,603	)		—			(7,603	)
	Reclass from non-accretable difference			—			332			332			(332	)		—
	Disposals/transfers			(2,520	)		1,129			(1,391	)		759			(632	)
	Contractual interest			869			(869	)		—			—			—
	Balance at end of period		$	46,809		$	(25,823	)	$	20,896		$	(5,765	)	$	15,221
	For the Year Ended December 31, 2013
	Balance at beginning of period		$	41,134		$	(23,733	)	$	17,401		$	(778	)	$	16,623
	Acquisitions			42,031			(24,266	)		17,765			(2,505	)		15,260
	Accretion			—			—			—			3,556			3,556
	Payments received			(10,670	)		1,345			(9,325	)		—			(9,325	)
	Reclass from non-accretable difference			—			8,097			8,097			(8,097	)		—
	Disposals/transfers			(18,695	)		14,405			(4,290	)		368			(3,922	)
	Contractual interest			2,700			(2,700	)		—			—			—
	Balance at end of period		$	56,500		$	(26,852	)	$	29,648		$	(7,456	)	$	22,192
Summary of Non-Performing Assets	'
	Following is a summary of non-performing assets:
			March 31,			December 31,
			2014			2013
	Non-accrual loans		$	60,039		$	58,755
	Troubled debt restructurings			19,384			18,698
	Total non-performing loans			79,423			77,453
	Other real estate owned (OREO)			43,216			40,681
	Total non-performing loans and OREO			122,639			118,134
	Non-performing investments			—			797
	Total non-performing assets		$	122,639		$	118,931
	Asset quality ratios:
	Non-performing loans as a percent of total loans			0.8	%		0.81	%
	Non-performing loans + OREO as a percent of total loans + OREO			1.23	%		1.24	%
	Non-performing assets as a percent of total assets			0.85	%		0.88	%
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 originated and loans acquired:
			30-89 Days			>90 Days			Non-			Total			Current			Total
			Past Due			Past Due and			Accrual			Past Due						Loans
						Still Accruing
	Originated loans:
	March 31, 2014
	Commercial real estate		$	6,297		$	243		$	43,385		$	49,925		$	2,627,227		$	2,677,152
	Commercial and industrial			2,564			8			4,194			6,766			1,841,566			1,848,332
	Commercial leases			1,150			—			744			1,894			159,600			161,494
	Total commercial loans and leases			10,011			251			48,323			58,585			4,628,393			4,686,978
	Direct installment			7,893			2,876			6,405			17,174			1,369,766			1,386,940
	Residential mortgages			8,591			1,406			3,521			13,518			674,520			688,038
	Indirect installment			3,762			240			1,259			5,261			669,086			674,347
	Consumer lines of credit			2,207			685			531			3,423			845,460			848,883
	Other			26			9			—			35			59,177			59,212
			$	32,490		$	5,467		$	60,039		$	97,996		$	8,246,402		$	8,344,398
	December 31, 2013
	Commercial real estate		$	5,428		$	252		$	40,960		$	46,640		$	2,593,788		$	2,640,428
	Commercial and industrial			2,066			8			6,643			8,717			1,752,951			1,761,668
	Commercial leases			714			—			734			1,448			157,447			158,895
	Total commercial loans and leases			8,208			260			48,337			56,805			4,504,186			4,560,991
	Direct installment			9,038			3,753			4,686			17,477			1,370,518			1,387,995
	Residential mortgages			12,681			2,401			4,260			19,342			658,885			678,227
	Indirect installment			5,653			471			1,060			7,184			642,517			649,701
	Consumer lines of credit			1,737			1,076			412			3,225			829,443			832,668
	Other			25			10			—			35			45,148			45,183
			$	37,342		$	7,971		$	58,755		$	104,068		$	8,050,697		$	8,154,765
			30-89			> 90 Days			Non-			Total			Current			Discount			Total
			Days			Past Due			Accrual			Past									Loans
			Past Due			and Still						Due (1)
						Accruing
	Acquired Loans:
	March 31, 2014
	Commercial real estate		$	23,180		$	31,063			—		$	54,243		$	790,425		$	(57,222	)	$	787,446
	Commercial and industrial			726			5,296			—			6,022			119,541			(8,830	)		116,733
	Commercial leases			—			—			—			—			—			—			—
	Total commercial loans and leases			23,906			36,359			—			60,265			909,966			(66,052	)		904,179
	Direct installment			1,112			957			—			2,069			76,628			1,921			80,618
	Residential mortgages			8,514			20,886			—			29,400			452,306			(33,954	)		447,752
	Indirect installment			101			31			—			132			5,032			(593	)		4,571
	Consumer lines of credit			1,035			3,396			—			4,431			164,660			(7,473	)		161,618
	Other			—			—			—			—			—			—			—
			$	34,668		$	61,629			—		$	96,297		$	1,608,592		$	(106,151	)	$	1,598,738
	December 31, 2013
	Commercial real estate		$	13,637		$	20,668			—		$	34,305		$	619,197		$	(48,721	)	$	604,781
	Commercial and industrial			1,860			1,899			—			3,759			124,415			(8,368	)		119,806
	Commercial leases			—			—			—			—			—			—			—
	Total commercial loans and leases			15,497			22,567			—			38,064			743,612			(57,089	)		724,587
	Direct installment			1,447			1,178			—			2,625			74,917			1,699			79,241
	Residential mortgages			11,464			19,298			—			30,762			412,704			(34,954	)		408,512
	Indirect installment			205			31			—			236			6,267			(617	)		5,886
	Consumer lines of credit			1,592			2,749			—			4,341			135,699			(6,937	)		133,103
	Other			—			—			—			—			—			—			—
			$	30,205		$	45,823			—		$	76,028		$	1,373,199		$	(97,898	)	$	1,351,329
	-1	Past due information for loans acquired is based on the contractual balance outstanding at March 31, 2014 and December 31, 2013.
Summary of Commercial Loans by Credit Quality	'
	The following tables present a summary of the Corporation’s commercial loans by credit quality category, segregated by loans originated and loans acquired:
			Commercial Loan Credit Quality Categories
			Pass			Special			Substandard			Doubtful			Total
						Mention
	Originated Loans:
	March 31, 2014
	Commercial real estate		$	2,501,710		$	70,417		$	103,838		$	1,187		$	2,677,152
	Commercial and industrial			1,688,867			97,558			61,642			265			1,848,332
	Commercial leases			158,289			2,182			1,023			—			161,494
			$	4,348,866		$	170,157		$	166,503		$	1,452		$	4,686,978
	December 31, 2013
	Commercial real estate		$	2,476,988		$	56,140		$	106,599		$	701		$	2,640,428
	Commercial and industrial			1,611,530			97,675			52,322			141			1,761,668
	Commercial leases			155,991			1,945			959			—			158,895
			$	4,244,509		$	155,760		$	159,880		$	842		$	4,560,991
	Acquired Loans:
	March 31, 2014
	Commercial real estate		$	575,859		$	94,461		$	111,306		$	5,820		$	787,446
	Commercial and industrial			98,716			4,265			13,702			50			116,733
	Commercial leases			—			—			—			—			—
			$	674,575		$	98,726		$	125,008		$	5,870		$	904,179
	December 31, 2013
	Commercial real estate		$	442,604		$	74,315		$	85,086		$	2,776		$	604,781
	Commercial and industrial			100,743			6,182			12,866			15			119,806
	Commercial leases			—			—			—			—			—
			$	543,347		$	80,497		$	97,952		$	2,791		$	724,587
Summary of Consumer Loans by Payment Status	'
	Following is a table showing originated consumer loans by payment status:
			Consumer Loan Credit Quality
			by Payment Status
			Performing			Non-Performing			Total
	March 31, 2014
	Direct installment		$	1,374,893		$	12,047		$	1,386,940
	Residential mortgages			674,077			13,961			688,038
	Indirect installment			672,948			1,399			674,347
	Consumer lines of credit			847,961			922			848,883
	Other			59,212			—			59,212
	December 31, 2013
	Direct installment		$	1,377,418		$	10,577		$	1,387,995
	Residential mortgages			664,214			14,013			678,227
	Indirect installment			648,499			1,202			649,701
	Consumer lines of credit			832,071			597			832,668
	Other			45,183			—			45,183
Summary of Impaired Loans, by Class	'
	Following is a summary of information pertaining to originated loans considered to be impaired, by class of loans:
			Recorded			Unpaid			Specific			Average
			Investment			Principal			Related			Recorded
						Balance			Allowance			Investment
	At or For the Three Months Ended March 31, 2014
	With no specific allowance recorded:
	Commercial real estate		$	36,987		$	50,287		$	—		$	38,730
	Commercial and industrial			4,972			6,613			—			6,136
	Commercial leases			744			744			—			739
	Total commercial loans and leases			42,703			57,644			—			45,605
	Direct installment			12,047			12,150			—			11,312
	Residential mortgages			13,961			14,507			—			88,787
	Indirect installment			1,399			2,861			—			1,301
	Consumer lines of credit			922			1,000			—			760
	Other			—			—			—			—
	With a specific allowance recorded:
	Commercial real estate			9,344			19,951			1,087			6,474
	Commercial and industrial			181			190			181			152
	Commercial leases			—			—			—			—
	Total commercial loans and leases			9,525			20,141			1,268			6,626
	Direct installment			—			—			—			—
	Residential mortgages			—			—			—			—
	Indirect installment			—			—			—			—
	Consumer lines of credit			—			—			—			—
	Other			—			—			—			—
	Total:
	Commercial real estate			46,331			70,238			1,087			45,204
	Commercial and industrial			5,153			6,803			181			6,288
	Commercial leases			744			744			—			739
	Total commercial loans and leases			52,228			77,785			1,268			52,231
	Direct installment			12,047			12,150			—			11,312
	Residential mortgages			13,961			14,507			—			88,787
	Indirect installment			1,399			2,861			—			1,301
	Consumer lines of credit			922			1,000			—			760
	Other			—			—			—			—
			Recorded			Unpaid			Specific			Average
			Investment			Principal			Related			Recorded
						Balance			Allowance			Investment
	At or For the Year Ended December 31, 2013
	With no specific allowance recorded:
	Commercial real estate		$	40,472		$	62,034		$	—		$	37,376
	Commercial and industrial			7,301			8,669			—			8,304
	Commercial leases			734			734			—			758
	Total commercial loans and leases			48,507			71,437			—			46,438
	Direct installment			10,577			10,830			—			10,557
	Residential mortgages			14,012			14,560			—			13,565
	Indirect installment			1,202			2,633			—			1,127
	Consumer lines of credit			597			668			—			573
	Other			—			—			—			—
	With a specific allowance recorded:
	Commercial real estate			3,603			3,818			701			14,379
	Commercial and industrial			122			130			123			126
	Commercial leases			—			—			—			—
	Total commercial loans and leases			3,725			3,948			824			14,505
	Direct installment			—			—			—			—
	Residential mortgages			—			—			—			—
	Indirect installment			—			—			—			—
	Consumer lines of credit			—			—			—			—
	Other			—			—			—			—
	Total:
	Commercial real estate			44,075			65,852			701			51,755
	Commercial and industrial			7,423			8,799			123			8,430
	Commercial leases			734			734			—			758
Total commercial loans and leases			52,232			75,385			824			60,943
Direct installment			10,577			10,830			—			10,557
Residential mortgages			14,012			14,560			—			13,565
Indirect installment			1,202			2,633			—			1,127
Consumer lines of credit			597			668			—			573
Other			—			—			—			—
Summary of Composition of Total TDRs	'
	Following is a summary of the composition of total TDRs:
			March 31,			December 31,
			2014			2013
	Accruing:
	Performing		$	10,289		$	10,220
	Non-performing			19,384			18,698
	Non-accrual			12,389			12,705
			$	42,062		$	41,623
Summary of Troubled Debt Restructurings by Class of Loans	'
	The majority of TDRs are the result of interest rate concessions for a limited period of time. Following is a summary of loans, by class, that have been restructured during the periods indicated:
			Three Months Ended March 31, 2014									Three Months Ended March 31, 2013
			Number			Pre-Modification			Post-			Number			Pre-Modification			Post-
			of			Outstanding			Modification			of			Outstanding			Modification
			Contracts			Recorded			Outstanding			Contracts			Recorded			Outstanding
						Investment			Recorded						Investment			Recorded
									Investment									Investment
	Commercial real estate			1		$	188		$	188			5		$	1,029		$	905
	Commercial and industrial			1			52			50			—			—			—
	Commercial leases			—			—			—			—			—			—
	Total commercial loans and leases			2			240			238			5			1,029			905
	Direct installment			126			1,678			1,647			110			1,176			1,150
	Residential mortgages			9			281			280			14			597			709
	Indirect installment			7			17			16			10			56			56
	Consumer lines of credit			7			255			255			9			173			172
	Other			—			—			—			—			—			—
				151		$	2,471		$	2,436			148		$	3,031		$	2,992
Summary of Troubled Debt Restructurings by Class of Loans, Payment Default	'
	Following is a summary of TDRs, by class of loans, 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						Three Months Ended
			March 31, 2014 (1)						March 31, 2013 (1)
			Number of			Recorded			Number of			Recorded
			Contracts			Investment			Contracts			Investment
	Commercial real estate			—		$	—			—		$	—
	Commercial and industrial			—			—			1			33
	Commercial leases			—			—			—			—
	Total commercial loans and leases			—			—			1			33
	Direct installment			18			171			21			170
	Residential mortgages			—			—			2			93
	Indirect installment			1			—			4			18
	Consumer lines of credit			—			—			—			—
	Other			—			—			—			—
				19		$	171			28		$	314
	-1	The recorded investment is as of period end.
Summary of Changes in Allowance for Loan Losses by Class	'
	Following is a summary of changes in the allowance for loan losses, by loan class:
			Balance at			Charge-			Recoveries			Net			Provision			Balance at
			Beginning of			Offs						Charge-			for Loan			End of
			Period									Offs			Losses			Period
	Three Months Ended March 31, 2014
	Commercial real estate		$	32,548		$	(2,223	)	$	299		$	(1,924	)	$	7,910		$	38,534
	Commercial and industrial			32,603			(513	)		370			(143	)		(2,489	)		29,971
	Commercial leases			1,903			(87	)		29			(58	)		99			1,944
	Total commercial loans and leases			67,054			(2,823	)		698			(2,125	)		5,520			70,449
	Direct installment			17,824			(2,521	)		267			(2,254	)		1,060			16,630
	Residential mortgages			5,836			(132	)		4			(128	)		(401	)		5,307
	Indirect installment			6,409			(802	)		217			(585	)		676			6,500
	Consumer lines of credit			7,231			(323	)		55			(268	)		695			7,658
	Other			530			(262	)		5			(257	)		306			579
	Total allowance on originated loans			104,884			(6,863	)		1,246			(5,617	)		7,856			107,123
	Purchased credit-impaired loans			1,000			(249	)		—			(249	)		(43	)		708
	Other acquired loans			4,900			9			286			295			(807	)		4,388
	Total allowance on acquired loans			5,900			(240	)		286			46			(850	)		5,096
	Total allowance		$	110,784		$	(7,103	)	$	1,532		$	(5,571	)	$	7,006		$	112,219
	Three Months Ended March 31, 2013
	Commercial real estate		$	34,810		$	(2,287	)	$	1,427		$	(860	)	$	6,062		$	40,012
	Commercial and industrial			31,849			(208	)		356			148			(3,159	)		28,838
	Commercial leases			1,744			(57	)		62			5			(53	)		1,696
	Total commercial loans and leases			68,403			(2,552	)		1,845			(707	)		2,850			70,546
	Direct installment			15,130			(2,345	)		233			(2,112	)		2,082			15,100
	Residential mortgages			5,155			(209	)		29			(180	)		3			4,978
	Indirect installment			5,449			(810	)		193			(617	)		320			5,152
	Consumer lines of credit			6,057			(342	)		87			(255	)		243			6,045
	Other			—			(177	)		—			(177	)		860			683
	Total allowance on originated loans			100,194			(6,435	)		2,387			(4,048	)		6,358			102,504
	Purchased credit-impaired loans			759			(156	)		—			(156	)		(20	)		583
	Other acquired loans			3,421			(213	)		204			(9	)		1,203			4,615
	Total allowance on acquired loans			4,180			(369	)		204			(165	)		1,183			5,198
	Total allowance		$	104,374		$	(6,804	)	$	2,591		$	(4,213	)	$	7,541		$	107,702
Summary of Individual and Collective Allowance for Loan Losses and Loan Balances by Class	'
	Following is a summary of the individual and collective originated allowance for loan losses and corresponding loan balances by class:
			Allowance						Loans Outstanding
			Individually			Collectively			Loans			Individually			Collectively
			Evaluated for			Evaluated for						Evaluated for			Evaluated for
			Impairment			Impairment						Impairment			Impairment
	March 31, 2014
	Commercial real estate		$	1,087		$	37,446		$	2,677,152		$	34,062		$	2,643,090
	Commercial and industrial			181			29,791			1,848,332			1,704			1,846,628
	Commercial leases			—			1,945			161,494			—			161,494
	Total commercial loans and leases			1,268			69,182			4,686,978			35,766			4,651,212
	Direct installment			—			16,629			1,386,940			—			1,386,940
	Residential mortgages			—			5,307			688,038			—			688,038
	Indirect installment			—			6,500			674,347			—			674,347
	Consumer lines of credit			—			7,658			848,883			—			848,883
	Other			—			579			59,212			—			59,212
			$	1,268		$	105,855		$	8,344,398		$	35,766		$	8,308,632
	December 31, 2013
	Commercial real estate		$	701		$	31,847		$	2,640,428		$	30,133		$	2,610,295
	Commercial and industrial			123			32,480			1,761,668			4,243			1,757,425
	Commercial leases			—			1,903			158,895			—			158,895
	Total commercial loans and leases			824			66,230			4,560,991			34,376			4,526,615
	Direct installment			—			17,824			1,387,995			—			1,387,995
	Residential mortgages			—			5,836			678,227			—			678,227
	Indirect installment			—			6,409			649,701			—			649,701
	Consumer lines of credit			—			7,231			832,668			—			832,668
	Other			—			530			45,183			—			45,183
			$	824		$	104,060		$	8,154,765		$	34,376		$	8,120,389

BORROWINGS_Tables

BORROWINGS (Tables)	3 Months Ended
	Mar. 31, 2014
Debt Disclosure [Abstract]	'
Summary of Short-Term Borrowings	'
	Following is a summary of short-term borrowings:
		March 31,		December 31,
		2014		2013
	Securities sold under repurchase agreements	$	787,712	$	841,741
	Federal funds purchased		300,000		270,000
	Subordinated notes		128,912		129,498
		$	1,216,624	$	1,241,239
Summary of Long-Term Debt	'
	Following is a summary of long-term debt:
		March 31,		December 31,
		2014		2013
	Federal Home Loan Bank advances	$	150,073	$	50,076
	Subordinated notes		85,679		84,637
	Other subordinated debt		—		8,637
	Convertible debt		—		578
		$	235,752	$	143,928

JUNIOR_SUBORDINATED_DEBT_Table

JUNIOR SUBORDINATED DEBT (Tables)	3 Months Ended
	Mar. 31, 2014
Text Block [Abstract]	'
Junior Subordinated Debt Trusts	'
	The following table provides information relating to the Trusts as of March 31, 2014:
		Trust		Common		Junior		Stated		Interest
		Preferred		Securities		Subordinated		Maturity		Rate
		Securities				Debt		Date
	F.N.B. Statutory Trust II	$	21,500	$	665	$	22,165		6/15/36		1.88	%	Variable; LIBOR + 165
													basis points (bps)
	Omega Financial Capital Trust I		36,000		1,114		36,042		10/18/34		2.43	%	Variable; LIBOR + 219 bps
	BCSB Capital Trust II		10,000		310		10,310		10/7/33		3.24	%	Variable; LIBOR + 300 bps
		$	67,500	$	2,089	$	68,517

DERIVATIVE_INSTRUMENTS_Tables

DERIVATIVE INSTRUMENTS (Tables)	3 Months Ended
	Mar. 31, 2014
Derivative Instruments And Hedging Activities Disclosure [Abstract]	'
Offsetting of Derivative Assets	'
		Gross		Gross			Net Amount
		Amount		Amounts			Presented in
				Offset in			the Balance
				the Balance			Sheet
				Sheet
	Offsetting of Derivative Assets:
	March 31, 2014
	Derivative assets subject to master netting arrangement:
	Interest rate contracts	$	2,172		—		$	2,172
	Equity contracts		41		—			41
	Derivative assets not subject to master netting arrangement:
	Interest rate contracts		31,079		—			31,079
	Total derivative assets	$	33,292		—		$	33,292
	December 31, 2013
	Derivative assets subject to master netting arrangement:
	Interest rate contracts	$	3,547		—		$	3,547
	Equity contracts		32		—			32
	Derivative assets not subject to master netting arrangement:
	Interest rate contracts		29,738		—			29,738
	Total derivative assets	$	33,317		—		$	33,317
Offsetting of Derivative Liabilities	'
	Offsetting of Derivative Liabilities:
	March 31, 2014
	Derivative liabilities subject to master netting arrangement:
	Interest rate contracts	$	38,332		—		$	38,332
	Derivative liabilities not subject to master netting arrangement:
	Interest rate contracts		1,792		—			1,792
	Equity contracts		41		—			41
	Total derivative liabilities	$	40,165		—		$	40,165
	December 31, 2013
	Derivative liabilities subject to master netting arrangement:
	Interest rate contracts	$	40,323		—		$	40,323
	Derivative liabilities not subject to master netting arrangement:
	Interest rate contracts		3,014		—			3,014
	Equity contracts		32		—			32
	Total derivative liabilities	$	43,369		—		$	43,369
Derivative Assets	'
				Gross Amounts Not Offset in the
				Balance Sheet
		Net Amount		Financial			Cash		Net
		Presented in the		Instruments			Collateral		Amount
		Balance Sheet					Received
	Derivative Assets:
	March 31, 2014
	Counterparty B	$	17	$	17		$	—	$	—
	Counterparty D		246		246			—		—
	Counterparty E		1,046		1,046			—		—
	Counterparty F		233		233			—		—
	Counterparty G		133		133			—		—
	Counterparty I		405		405			—		—
	Counterparty J		133		—			133		—
		$	2,213	$	2,080		$	133		—
	December 31, 2013
	Counterparty B	$	24	$	24		$	—	$	—
	Counterparty D		566		566			—		—
	Counterparty E		1,696		1,696			—		—
	Counterparty F		355		273			—		82
	Counterparty G		251		251			—		—
	Counterparty I		634		634			—		—
	Counterparty J		53		—			53		—
		$	3,579	$	3,444		$	53	$	82
Derivative Liabilities	'
	Derivative Liabilities:
	March 31, 2014
	Counterparty A	$	4,682	$	4,682		$	—	$	—
	Counterparty B		3,005		3,005			—
	Counterparty C		1,356		1,356			—		—
	Counterparty D		8,855		8,855			—		—
	Counterparty E		5,093		5,093			—		—
	Counterparty F		15		15			—		—
	Counterparty G		4,804		4,804			—		—
	Counterparty H		2,119		—			—		2,119
	Counterparty I		5,731		5,731			—		—
	Counterparty J		2,672		—			2,672		—
		$	38,332	$	33,541		$	2,672	$	2,119
	December 31, 2013
	Counterparty A	$	4,934	$	4,934		$	—	$	—
	Counterparty B		3,249		3,249			—		—
	Counterparty C		1,431		1,431			—		—
	Counterparty D		9,614		9,614			—		—
	Counterparty E		6,257		6,257			—		—
	Counterparty F		13		13			—		—
	Counterparty G		5,309		5,309			—		—
	Counterparty H		2,257		125			—		2,132
	Counterparty I		5,649		5,649			—		—
	Counterparty J		1,610		—			1,610		—
		$	40,323	$	36,581		$	1,610	$	2,132
Effect of Corporation's Derivative Financial Instruments on Income Statement	'
	The following table presents the effect of the Corporation’s derivative financial instruments on the income statement:
		Income		Three Months Ended
		Statement		March 31,
		Location		2014			2013
	Interest Rate Products		Other income	$	(14	)	$	136

COMMITMENTS_CREDIT_RISK_AND_CO1

COMMITMENTS, CREDIT RISK AND CONTINGENCIES (Tables)	3 Months Ended
	Mar. 31, 2014
Commitments And Contingencies Disclosure [Abstract]	'
Summary of Off-Balance Sheet Credit Risk Information	'
	Following is a summary of off-balance sheet credit risk information:
		March 31,		December 31,
		2014		2013
	Commitments to extend credit	$	3,103,359	$	2,897,748
	Standby letters of credit		118,281		114,298

STOCK_INCENTIVE_PLANS_Tables

STOCK INCENTIVE PLANS (Tables)	3 Months Ended
	Mar. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Summary of Information Concerning Restricted Stock Awards	'
	The following table summarizes certain information concerning restricted stock awards:
		Three Months Ended March 31,
		2014					2013
		Awards			Weighted		Awards			Weighted
					Average					Average
					Grant					Grant
					Price					Price
	Unvested awards outstanding at beginning of period		1,729,033		$	10.23		1,913,073		$	9.17
	Granted		—			—		295,705			11.74
	Net adjustment due to performance		(19,002	)		8.48		—			—
	Vested		(667,956	)		9.01		(734,130	)		7.9
	Forfeited		(430	)		10.69		(622	)		9.23
	Dividend reinvestment		9,612			13.01		12,008			11.78
	Unvested awards outstanding at end of period		1,051,257			11.06		1,486,034			10.34
Components of Restricted Stock Awards	'
	The components of the restricted stock awards as of March 31, 2014 are as follows:
		Service-			Performance-		Total
		Based			Based
		Awards			Awards
	Unvested awards		262,189			789,068		1,051,257
	Unrecognized compensation expense	$	1,390		$	2,769	$	4,159
	Intrinsic value	$	3,516		$	10,574	$	14,090
	Weighted average remaining life (in years)		1.91			2.02		1.99
Summary of Information Concerning Stock Option Awards	'
	The following table summarizes certain information concerning stock option awards:
		Three Months Ended March 31,
		2014					2013
		Shares			Weighted		Shares			Weighted
					Average					Average
					Exercise					Exercise
					Price					Price
	Options outstanding at beginning of period		533,524		$	11.5		640,050		$	13.21
	Assumed from acquisition		304,785			5.77		—			—
	Exercised		(87,332	)		6.05		—			—
	Forfeited		(48,172	)		25.79		(263,589	)		14.92
	Options outstanding and exercisable at end of period		702,805			8.71		376,461			12.01

RETIREMENT_PLANS_Tables

RETIREMENT PLANS (Tables)	3 Months Ended
	Mar. 31, 2014
Compensation And Retirement Disclosure [Abstract]	'
Net Periodic Benefit Cost for Defined Benefit Plans	'
	The net periodic benefit cost for the defined benefit plans includes the following components:
		Three Months Ended
		March 31,
		2014			2013
	Service cost	$	16		$	18
	Interest cost		1,596			1,427
	Expected return on plan assets		(2,487	)		(2,270	)
	Amortization:
	Unrecognized net transition asset		(5	)		(23	)
	Unrecognized prior service cost (credit)		2			2
	Unrecognized loss		337			557
	Net periodic pension cost	$	(541	)	$	(289	)

COMPREHENSIVE_INCOME_Tables

COMPREHENSIVE INCOME (Tables)	3 Months Ended
	Mar. 31, 2014
Equity [Abstract]	'
Components of Comprehensive Income, Net of Related Tax	'
	The components of comprehensive income, net of related tax, are as follows:
			Three Months Ended
			March 31,
			2014			2013
	Net income		$	34,524		$	28,538
	Other comprehensive income (loss):
	Securities available for sale:
	Unrealized gains (losses) arising during the period, net of tax expense (benefit) of $5,681 and $(99)			10,550			(184	)
	Reversal of non-credit related losses on debt securities not expected to be sold, net of tax expense of $3,335			6,192			—
	Reclassification adjustment for gains included in net income, net of tax expense of $3,311 and $239			(6,150	)		(445	)
	Derivative instruments:
	Unrealized gains (losses) arising during the period, net of tax expense (benefit) of $1,117 and $(373)			2,074			(694	)
	Pension and postretirement benefit obligations:
	Unrealized gains arising during the period, net of tax expense of $117 and $188			217			349
	Other comprehensive income (loss)			12,883			(974	)
	Comprehensive income		$	47,407		$	27,564
Changes in Accumulated Other Comprehensive Income, Net of Tax, by Component	'
	The following table presents changes in accumulated other comprehensive income, net of tax, by component:
			Unrealized			Non-Credit			Unrealized			Unrecognized			Total
			Net Gains			Related Loss			Losses on			Pension and
			(Losses) on			on Debt			Derivative			Postretirement
			Securities			Securities not			Instruments			Obligations
			Available			Expected  to
			for Sale			be Sold
	Three Months Ended March 31, 2014
	Balance at beginning of period		$	(11,874	)	$	(6,192	)	$	(6,586	)	$	(32,272	)	$	(56,924	)
	Other comprehensive income (loss) before reclassifications			10,550			6,192			2,074			217			19,033
	Amounts reclassified from accumulated other comprehensive income			(6,150	)		—			—			—			(6,150	)
	Net current period other comprehensive income (loss)			4,400			6,192			2,074			217			12,883
	Balance at end of period		$	(7,474	)	$	—		$	(4,512	)	$	(32,055	)	$	(44,041	)
Summary of Reclassifications Out of Accumulated Other Comprehensive Income	'
	The following table presents a summary of the reclassifications out of accumulated other comprehensive income:
	Three Months Ended March 31, 2014
	Details About Accumulated Other		Amount			Affected Line Item
	Comprehensive Income Component		Reclassified from			in the Statement
			Other			where Net Income
			Comprehensive			is Presented
			Income
	Unrealized net gains on securities available for sale (1)		$	(9,461	)	Net securities gains
				(3,311	)	Tax expense
			$	(6,150	)
	-1	For additional detail related to unrealized net gains on securities available for sale and related amounts reclassified from accumulated other comprehensive income see the “Securities” note in this Report.

EARNINGS_PER_COMMON_SHARE_Tabl

EARNINGS PER COMMON SHARE (Tables)	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]	'
Computation of Basic and Diluted Earnings Per Common Share	'
	The following table sets forth the computation of basic and diluted earnings per common share:
		Three Months Ended
		March 31,
		2014		2013
	Net income	$	34,524	$	28,538
	Preferred stock dividends		2,322		—
	Net income available to common stockholders	$	32,202	$	28,538
	Basic weighted average common shares outstanding		162,186,395		139,650,495
	Net effect of dilutive stock options, warrants, restricted stock and convertible debt		1,780,851		1,415,695
	Diluted weighted average common shares outstanding		163,967,246		141,066,190
	Earnings per common share:
	Basic	$	0.2	$	0.2
	Diluted	$	0.2	$	0.2

CASH_FLOW_INFORMATION_Tables

CASH FLOW INFORMATION (Tables)	3 Months Ended
	Mar. 31, 2014
Supplemental Cash Flow Elements [Abstract]	'
Summary of Cash Flow Information	'
	Following is a summary of supplemental cash flow information:
	Three Months Ended March 31	2014		2013
	Interest paid on deposits and other borrowings	$	10,576	$	13,489
	Income taxes paid		—		—
	Transfers of loans to other real estate owned		4,849		3,271
	Financing of other real estate owned sold		—		113

BUSINESS_SEGMENTS_Tables

BUSINESS SEGMENTS (Tables)	3 Months Ended
	Mar. 31, 2014
Segment Reporting [Abstract]	'
Financial Information for Segments of Corporation	'
	The following tables provide financial information for these segments of the Corporation. The information provided under the caption “Parent and Other” represents operations not considered to be reportable segments and/or general operating expenses of the Corporation, and includes the parent company, other non-bank subsidiaries and eliminations and adjustments which are necessary for purposes of reconciliation to the consolidated amounts.
		Community		Wealth		Insurance		Consumer		Parent			Consolidated
		Banking		Management				Finance		and Other
	At or for the Three Months Ended March 31, 2014
	Interest income	$	106,691	$	—	$	25	$	9,365	$	1,799		$	117,880
	Interest expense		8,248		—		—		846		961			10,055
	Net interest income		98,443		—		25		8,519		838			107,825
	Provision for loan losses		5,296		—		—		1,457		253			7,006
	Non-interest income		31,913		7,323		4,210		660		(2,036	)		42,070
	Non-interest expense		76,866		6,292		3,046		4,937		742			91,883
	Intangible amortization		2,110		72		101		—		—			2,283
	Income tax expense (benefit)		13,343		351		385		1,073		(953	)		14,199
	Net income (loss)		32,741		608		703		1,712		(1,240	)		34,524
	Total assets		14,299,543		19,542		19,954		182,018		(44,547	)		14,476,510
	Total intangibles		833,642		10,936		10,425		1,809		—			856,812
	At or for the Three Months Ended March 31, 2013
	Interest income	$	94,051	$	—	$	28	$	9,016	$	2,023		$	105,118
	Interest expense		8,918		—		—		856		2,248			12,022
	Net interest income		85,133		—		28		8,160		(225	)		93,096
	Provision for loan losses		5,820		—		—		1,527		194			7,541
	Non-interest income		23,698		7,115		3,559		629		(1,389	)		33,612
	Non-interest expense		62,968		6,086		2,811		4,516		496			76,877
	Intangible amortization		1,748		76		101		—		—			1,925
	Income tax expense (benefit)		11,172		350		239		1,048		(982	)		11,827
	Net income (loss)		27,123		603		436		1,698		(1,322	)		28,538
	Total assets		11,816,414		18,520		19,141		175,710		(31,795	)		11,997,990
	Total intangibles		687,545		11,236		10,830		1,809		—			711,420

FAIR_VALUE_MEASUREMENTS_Tables

FAIR VALUE MEASUREMENTS (Tables)	3 Months Ended
	Mar. 31, 2014
Fair Value Disclosures [Abstract]	'
Balances of Assets and Liabilities Measured at Fair Value on Recurring Basis	'
	The following table presents the balances of assets and liabilities measured at fair value on a recurring basis:
		Level 1			Level 2			Level 3			Total
	March 31, 2014
	Assets measured at fair value
	Available for sale debt securities:
	U.S. government-sponsored entities	$	—		$	264,681		$	—		$	264,681
	Residential mortgage-backed securities
	Agency mortgage-backed securities		—			355,941			—			355,941
	Agency collateralized mortgage obligations		—			609,752			—			609,752
	Non-agency collateralized mortgage obligations		—			16			1,663			1,679
	Commercial mortgage-backed securities		—			9,129			—			9,129
	States of the U.S. and political subdivisions		—			14,505			—			14,505
	Other debt securities		—			16,240			—			16,240
			—			1,270,264			1,663			1,271,927
	Available for sale equity securities:
	Financial services industry		558			1,106			414			2,078
	Insurance services industry		65			—			—			65
			623			1,106			414			2,143
			623			1,271,370			2,077			1,274,070
	Derivative financial instruments:
	Trading		—			33,173			—			33,173
	Not for trading		—			119			—			119
			—			33,292			—			33,292
		$	623		$	1,304,662		$	2,077		$	1,307,362
	Liabilities measured at fair value
	Derivative financial instruments:
	Trading		—		$	33,105			—		$	33,105
	Not for trading		—			7,060			—			7,060
			—		$	40,165			—		$	40,165
		Level 1			Level 2			Level 3			Total
	December 31, 2013
	Assets measured at fair value
	Available for sale debt securities:
	U.S. government-sponsored entities	$	—		$	330,985		$	—		$	330,985
	Residential mortgage-backed securities
	Agency mortgage-backed securities		—			250,881			—			250,881
	Agency collateralized mortgage obligations		—			491,199			—			491,199
	Non-agency collateralized mortgage obligations		—			18			1,744			1,762
	States of the U.S. and political subdivisions		—			17,002			—			17,002
	Collateralized debt obligations		—			—			31,595			31,595
	Other debt securities		—			16,100			—			16,100
			—			1,106,185			33,339			1,139,524
	Available for sale equity securities:
	Financial services industry		584			1,067			410			2,061
	Insurance services industry		65			—			—			65
			649			1,067			410			2,126
			649			1,107,252			33,749			1,141,650
	Derivative financial instruments:
	Trading		—			33,317			—			33,317
	Not for trading		—			—			—			—
			—			33,317			—			33,317
		$	649		$	1,140,569		$	33,749		$	1,174,967
	Liabilities measured at fair value
	Derivative financial instruments:
	Trading		—		$	33,236			—		$	33,236
	Not for trading		—			10,133			—			10,133
			—		$	43,369			—		$	43,369
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			Other			Equity			Residential			Total
		Preferred			Debt			Securities			Non-Agency
		Collateralized			Securities						Collateralized
		Debt									Mortgage
		Obligations									Obligations
	Three Months Ended March 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			—			4			4			5,616
	Accretion included in earnings		657			—			—			1			658
	Purchases, issuances, sales and settlements:
	Purchases		—			—			—			—			—
	Issuances		—			—			—			—			—
	Sales/redemptions		(51,527	)		—			—			—			(51,527	)
	Settlements		(99	)		—			—			(86	)		(185	)
	Transfers from Level 3		—			—			—			—			—
	Transfers into Level 3		—			—			—			—			—
	Balance at end of period	$	—			—		$	414		$	1,663		$	2,077
	Year Ended December 31, 2013
	Balance at beginning of period	$	22,456		$	6,892		$	512		$	2,705		$	32,565
	Total gains (losses) – realized/unrealized:
	Included in earnings		—			78			—			—			78
	Included in other comprehensive income		6,701			21			18			(35	)		6,705
	Accretion included in earnings		3,160			4			—			12			3,176
	Purchases, issuances, sales and settlements:
	Purchases		—			—			—			—			—
	Issuances		38			—			—			—			38
	Sales/redemptions		—			(1,033	)		—			—			(1,033	)
	Settlements		(760	)		—			—			(938	)		(1,698	)
	Transfers from Level 3		—			(5,962	)		(120	)		—			(6,082	)
	Transfers into Level 3		—			—			—			—			—
	Balance at end of period	$	31,595		$	—		$	410		$	1,744		$	33,749
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
	March 31, 2014
	Impaired loans		—		$	9,422		$	—		$	9,422
	Other real estate owned		—			1,373			3,286			4,659
	December 31, 2013
	Impaired loans		—		$	3,235		$	59		$	3,294
	Other real estate owned		—			4,485			14,957			19,442
Fair Values of Corporation's Financial Instruments	'
	The fair values of the Corporation’s financial instruments are as follows:
		Carrying			Fair			Fair Value Measurements
		Amount			Value			Level 1			Level 2			Level 3
	March 31, 2014
	Financial Assets
	Cash and cash equivalents	$	246,253		$	246,253		$	246,253		$	—		$	—
	Securities available for sale		1,274,070			1,274,070			623			1,271,370			2,077
	Securities held to maturity		1,420,446			1,418,994			—			1,412,618			6,376
	Net loans, including loans held for sale		9,834,857			9,668,159			—			—			9,668,159
	Bank owned life insurance		307,872			312,290			312,290			—			—
	Derivative assets		33,292			33,292			—			33,292			—
	Accrued interest receivable		37,199			37,199			37,199			—			—
	Financial Liabilities
	Deposits		10,938,736			10,948,821			8,161,249			2,787,572			—
	Short-term borrowings		1,216,624			1,216,624			1,216,624			—			—
	Long-term debt		235,752			238,381			—			—			238,381
	Junior subordinated debt		68,517			69,465			—			—			69,465
	Derivative liabilities		40,165			40,165			—			40,165			—
	Accrued interest payable		6,539			6,539			6,539			—			—
	December 31, 2013
	Financial Assets
	Cash and cash equivalents	$	213,981		$	213,981		$	213,981		$	—		$	—
	Securities available for sale		1,141,650			1,141,650			649			1,107,252			33,749
	Securities held to maturity		1,199,169			1,189,563			—			1,182,671			6,892
	Net loans, including loans held for sale		9,402,448			9,243,780			—			—			9,243,780
	Bank owned life insurance		289,402			292,694			292,694			—			—
	Derivative assets		33,317			33,317			—			33,317			—
	Accrued interest receivable		35,520			35,520			35,520			—			—
	Financial Liabilities
	Deposits		10,198,232			10,208,268			7,592,159			2,616,109			—
	Short-term borrowings		1,241,239			1,241,239			1,241,239			—			—
	Long-term debt		143,928			145,995			—			—			145,995
	Junior subordinated debt		75,205			70,442			—			—			70,442
	Derivative liabilities		43,369			43,369			—			43,369			—
	Accrued interest payable		7,061			7,061			7,061			—			—

Business_Additional_Informatio

Business - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2014
	Office
	Location
	State
Organization Consolidation And Presentation Of Financial Statements [Abstract]	'
Number of states, Company operating financial services	6
Number of metropolitan areas, Company operating financial services	3
Number of consumer finance offices	72
Number of banking offices	283

Securities_Offerings_Additiona

Securities Offerings - Additional Information (Detail) (USD $)	0 Months Ended		3 Months Ended
In Thousands, except Share data, unless otherwise specified	Nov. 14, 2013	Nov. 01, 2013	Mar. 31, 2014	Mar. 31, 2013
Stockholders' Equity [Line Items]	'	'	'	'
Public offering, common stock	'	4,693,876	'	'
Common stock per share price	'	$12.25	'	'
Net proceeds from common stock offerings	$54,434	'	$3,755	($696)
Net proceeds from preferred stock offerings	$106,882	'	'	'
Series E [Member]	'	'	'	'
Stockholders' Equity [Line Items]	'	'	'	'
Public offering, depositary shares	'	4,000,000	'	'
Depositary shares, price per share	'	$25	'	'
Common Stock Over-Allotment Option [Member]	'	'	'	'
Stockholders' Equity [Line Items]	'	'	'	'
Public offering, common stock	'	612,244	'	'
Preferred Stock Over-Allotment Option [Member]	'	'	'	'
Stockholders' Equity [Line Items]	'	'	'	'
Public offering, depositary shares	435,080	'	'	'

Mergers_and_Acquisitions_Addit

Mergers and Acquisitions - Additional Information (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Apr. 08, 2014	Oct. 12, 2013	Feb. 15, 2014	Apr. 06, 2013
In Thousands, except Share data, unless otherwise specified			Subsequent Event [Member]	PVF Capital Corp (PVF) [Member]	BCSB Bancorp, Inc. (BCSB) [Member]	Annapolis Bancorp, Inc. [Member]
Business Acquisition [Line Items]	'	'	'	'	'	'
Assets acquired as a result of merger	'	'	$390,000	$686,401	$596,795	$394,363
Value of acquisition	'	'	94,000	'	'	'
Exchange ratio	'	'	1.781	'	'	'
Loans acquired as a result of merger	'	'	'	512,566	308,389	256,199
Deposits acquired as a result of merger	'	'	'	627,046	532,197	349,370
Value of acquisition	'	'	'	109,856	80,554	56,300
Common shares issued	'	'	'	8,893,598	6,730,597	4,641,412
Common shares acquired	'	'	'	26,119,398	3,235,961	4,060,802
Goodwill recorded as a result of merger	805,788	764,248	'	52,085	42,292	35,854
Core deposit intangibles recorded as result of the acquisition	'	'	'	6,867	6,591	3,775
Contingent cash payment due to collection of loan	'	'	'	'	'	$609
Contingent cash payment due to collection of loan, per share	'	'	'	'	'	$0.15
Warrants converted to purchase common stock	'	'	'	'	'	342,564
Warrant expiration date	'	'	'	'	'	30-Jan-19
Warrant exercise price	'	'	'	'	'	3.57

Securities_Schedule_of_Amortiz

Securities - Schedule of Amortized Cost and Fair Value of Securities Available for Sale (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities Available For Sale, Amortized Cost	$1,285,605	$1,169,482
Securities Available For Sale, Gross Unrealized Gains	7,746	11,463
Securities Available For Sale, Gross Unrealized Losses	-19,281	-39,295
Securities Available For Sale, Fair Value	1,271,927	1,139,524
Securities Available For Sale, Fair Value	2,143	2,126
Assets measured at fair value, Available for sale securities	1,274,070	1,141,650
U.S. Government-Sponsored Entities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities Available For Sale, Amortized Cost	268,330	336,763
Securities Available For Sale, Gross Unrealized Gains	50	126
Securities Available For Sale, Gross Unrealized Losses	-3,699	-5,904
Securities Available For Sale, Fair Value	264,681	330,985
Agency Mortgage-Backed Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities Available For Sale, Amortized Cost	352,209	247,880
Securities Available For Sale, Gross Unrealized Gains	4,637	4,304
Securities Available For Sale, Gross Unrealized Losses	-905	-1,303
Securities Available For Sale, Fair Value	355,941	250,881
Assets measured at fair value, Available for sale securities	355,941	'
Agency Collateralized Mortgage Obligations [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities Available For Sale, Amortized Cost	622,060	511,098
Securities Available For Sale, Gross Unrealized Gains	1,335	895
Securities Available For Sale, Gross Unrealized Losses	-13,643	-20,794
Securities Available For Sale, Fair Value	609,752	491,199
Assets measured at fair value, Available for sale securities	609,752	'
Non-Agency Collateralized Mortgage Obligations [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities Available For Sale, Amortized Cost	1,661	1,747
Securities Available For Sale, Gross Unrealized Gains	18	15
Securities Available For Sale, Gross Unrealized Losses	'	'
Securities Available For Sale, Fair Value	1,679	1,762
Assets measured at fair value, Available for sale securities	1,679	'
Commercial Mortgage-Backed Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities Available For Sale, Amortized Cost	9,153	'
Securities Available For Sale, Gross Unrealized Gains	'	'
Securities Available For Sale, Gross Unrealized Losses	-24	'
Securities Available For Sale, Fair Value	9,129	'
Assets measured at fair value, Available for sale securities	9,129	'
States of the U.S. and Political Subdivisions [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities Available For Sale, Amortized Cost	14,216	16,842
Securities Available For Sale, Gross Unrealized Gains	438	410
Securities Available For Sale, Gross Unrealized Losses	-149	-250
Securities Available For Sale, Fair Value	14,505	17,002
Collateralized Debt Obligations [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities Available For Sale, Amortized Cost	'	37,203
Securities Available For Sale, Gross Unrealized Gains	'	4,507
Securities Available For Sale, Gross Unrealized Losses	'	-10,115
Securities Available For Sale, Fair Value	'	31,595
Other Debt Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities Available For Sale, Amortized Cost	16,532	16,505
Securities Available For Sale, Gross Unrealized Gains	569	524
Securities Available For Sale, Gross Unrealized Losses	-861	-929
Securities Available For Sale, Fair Value	16,240	16,100
Debt securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities Available For Sale, Amortized Cost	1,284,161	1,168,038
Securities Available For Sale, Gross Unrealized Gains	7,047	10,781
Securities Available For Sale, Gross Unrealized Losses	-19,281	-39,295
Securities Available For Sale, Fair Value	1,271,927	1,139,524
Equity Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities Available For Sale, Amortized Cost	1,444	1,444
Securities Available For Sale, Gross Unrealized Gains	699	682
Securities Available For Sale, Gross Unrealized Losses	'	'
Securities Available For Sale, Fair Value	2,143	2,126
Assets measured at fair value, Available for sale securities	$2,143	'

Securities_Schedule_of_Amortiz1

Securities - Schedule of Amortized Cost and Fair Value of Securities Held to Maturity (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Investment Securities Held To Maturity [Line Items]	'	'
Securities Held To Maturity, Amortized Cost	$1,420,446	$1,199,169
Securities Held To Maturity, Gross Unrealized Gains	16,595	15,484
Securities Held To Maturity, Gross Unrealized Losses	-18,047	-25,090
Securities Held To Maturity, Fair Value	1,418,994	1,189,563
U.S. Treasury [Member]	'	'
Investment Securities Held To Maturity [Line Items]	'	'
Securities Held To Maturity, Amortized Cost	502	503
Securities Held To Maturity, Gross Unrealized Gains	123	99
Securities Held To Maturity, Gross Unrealized Losses	'	'
Securities Held To Maturity, Fair Value	625	602
U.S. Government-Sponsored Entities [Member]	'	'
Investment Securities Held To Maturity [Line Items]	'	'
Securities Held To Maturity, Amortized Cost	101,787	43,322
Securities Held To Maturity, Gross Unrealized Gains	181	180
Securities Held To Maturity, Gross Unrealized Losses	-1,284	-1,151
Securities Held To Maturity, Fair Value	100,684	42,351
Agency Mortgage-Backed Securities [Member]	'	'
Investment Securities Held To Maturity [Line Items]	'	'
Securities Held To Maturity, Amortized Cost	725,154	628,681
Securities Held To Maturity, Gross Unrealized Gains	12,529	12,281
Securities Held To Maturity, Gross Unrealized Losses	-3,817	-6,032
Securities Held To Maturity, Fair Value	733,866	634,930
Agency Collateralized Mortgage Obligations [Member]	'	'
Investment Securities Held To Maturity [Line Items]	'	'
Securities Held To Maturity, Amortized Cost	452,909	385,408
Securities Held To Maturity, Gross Unrealized Gains	1,225	764
Securities Held To Maturity, Gross Unrealized Losses	-11,976	-15,844
Securities Held To Maturity, Fair Value	442,158	370,328
Non-Agency Collateralized Mortgage Obligations [Member]	'	'
Investment Securities Held To Maturity [Line Items]	'	'
Securities Held To Maturity, Amortized Cost	6,352	6,852
Securities Held To Maturity, Gross Unrealized Gains	24	44
Securities Held To Maturity, Gross Unrealized Losses	'	-4
Securities Held To Maturity, Fair Value	6,376	6,892
Commercial Mortgage-Backed Securities [Member]	'	'
Investment Securities Held To Maturity [Line Items]	'	'
Securities Held To Maturity, Amortized Cost	2,236	2,241
Securities Held To Maturity, Gross Unrealized Gains	121	124
Securities Held To Maturity, Gross Unrealized Losses	-15	-37
Securities Held To Maturity, Fair Value	2,342	2,328
States of the U.S. and Political Subdivisions [Member]	'	'
Investment Securities Held To Maturity [Line Items]	'	'
Securities Held To Maturity, Amortized Cost	131,506	132,162
Securities Held To Maturity, Gross Unrealized Gains	2,392	1,992
Securities Held To Maturity, Gross Unrealized Losses	-955	-2,022
Securities Held To Maturity, Fair Value	$132,943	$132,132

Securities_Gross_Gains_and_Gro

Securities - Gross Gains and Gross Losses Realized on Sales of Securities (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Investments Debt And Equity Securities [Abstract]	'	'
Gross gains	$18,009	$1,032
Gross losses	-8,548	-348
Total	$9,461	$684

Securities_Additional_Informat

Securities - Additional Information (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
	Security
	Securities
Schedule Of Securities [Line Items]	'	'	'
Number of pooled issue securities	23	'	'
Net proceeds from sale of securities	$85,877	$21,919	'
Gain on sale of securities	9,461	684	'
Securities pledged to secure public deposits, trust deposits and for other purposes, carrying value	946,173	'	909,548
Securities pledged as collateral for short-term borrowings, carrying value	811,881	'	860,279
Number of single-issuer securities	4	'	'
Estimated fair value of single-issue trust preferred securities	6,020	'	'
Amortized cost of single-issue trust preferred securities	6,881	'	'
Impairment losses on securities	0	0	'
Municipal bond portfolio, value	146,011	'	'
Percent of municipal bond portfolio rated A or better	98.50%	'	'
Percent of municipal bond portfolio, general obligation bonds	98.90%	'	'
Average holding size of municipal bond	1,000	'	'
Percent of portfolio with credit support	69.20%	'	'
State of Pennsylvania [Member]	'	'	'
Schedule Of Securities [Line Items]	'	'	'
Percent of municipal bonds	80.90%	'	'
Pooled TPS [Member]	'	'	'
Schedule Of Securities [Line Items]	'	'	'
Net proceeds from sale of securities	51,540	'	'
Gain on sale of securities	$13,766	'	'

Securities_Amortized_Cost_and_

Securities - Amortized Cost and Fair Value of Securities, by Contractual Maturities (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule Of Securities [Line Items]	'	'
Available for Sale, Due in one year or less, Amortized Cost	'	'
Available for Sale, Due from one to five years, Amortized Cost	209,466	'
Available for Sale, Due from five to ten years, Amortized Cost	82,024	'
Available for Sale, Due after ten years, Amortized Cost	7,588	'
Available for Sale, with contractual maturities, Amortized Cost	299,078	'
Total securities available for sale, Amortized Cost	1,285,605	1,169,482
Available for Sale, Due in one year or less, Fair Value	'	'
Available for Sale, Due from one to five years, Fair Value	207,689	'
Available for Sale, Due from five to ten years, Fair Value	80,998	'
Available for Sale, Due after ten years, Fair Value	6,739	'
Available for Sale, with contractual maturities, Fair Value	295,426	'
Total available for sale Securities, Fair Value	1,274,070	1,141,650
Held to Maturity, Due in one year or less, Amortized Cost	2,716	'
Held to Maturity, Due from one to five years, Amortized Cost	77,526	'
Held to Maturity, Due from five to ten years, Amortized Cost	85,763	'
Held to Maturity, Due after ten years, Amortized Cost	67,790	'
Securities Held To Maturity, with contractual maturities, Amortized Cost	233,795	'
Held to Maturity, with contractual maturities, Amortized Cost	1,420,446	1,199,169
Held to Maturity, Due in one year or less, Fair Value	2,766	'
Held to Maturity, Due from one to five years, Fair Value	76,567	'
Held to Maturity, Due from five to ten years, Fair Value	86,428	'
Held to Maturity, Due after ten years, Fair Value	68,491	'
Securities Held To Maturity, with contractual maturities, Fair Value	234,252	'
Held to Maturity, with contractual maturities, Fair Value	1,418,994	1,189,563
Agency Mortgage-Backed Securities [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Total securities available for sale, Amortized Cost	352,209	247,880
Total available for sale Securities, Fair Value	355,941	'
Held to Maturity, with contractual maturities, Amortized Cost	725,154	628,681
Held to Maturity, with contractual maturities, Fair Value	733,866	634,930
Agency Collateralized Mortgage Obligations [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Total securities available for sale, Amortized Cost	622,060	511,098
Total available for sale Securities, Fair Value	609,752	'
Held to Maturity, with contractual maturities, Amortized Cost	452,909	385,408
Held to Maturity, with contractual maturities, Fair Value	442,158	370,328
Non-Agency Collateralized Mortgage Obligations [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Total securities available for sale, Amortized Cost	1,661	1,747
Total available for sale Securities, Fair Value	1,679	'
Held to Maturity, with contractual maturities, Amortized Cost	6,352	6,852
Held to Maturity, with contractual maturities, Fair Value	6,376	6,892
Commercial Mortgage-Backed Securities [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Total securities available for sale, Amortized Cost	9,153	'
Total available for sale Securities, Fair Value	9,129	'
Held to Maturity, with contractual maturities, Amortized Cost	2,236	2,241
Held to Maturity, with contractual maturities, Fair Value	2,342	2,328
Equity Securities [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Total securities available for sale, Amortized Cost	1,444	1,444
Total available for sale Securities, Fair Value	2,143	'
Held to Maturity, with contractual maturities, Amortized Cost	'	'
Held to Maturity, with contractual maturities, Fair Value	'	'

Securities_Summaries_of_Fair_V

Securities - Summaries of Fair Values and Unrealized Losses of Securities, Segregated by Length of Impairment (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Security	Security
Schedule Of Securities [Line Items]	'	'
Number of available for sale securities, Less than 1 year	56	54
Number of available for sale securities, Greater than 1 year	8	14
Number of available for sale securities	64	68
Securities Available For Sale, Less than 12 Months, Fair Value	$837,940	$734,257
Securities Available For Sale, Less than 12 Months, Unrealized Losses	-14,714	-26,101
Securities Available For Sale, 12 Months or More, Fair Value	74,286	48,144
Securities Available For Sale, 12 Months or More, Unrealized Losses	-4,567	-13,194
Securities Available For Sale, Fair Value, Total	912,226	782,401
Securities Available For Sale, Unrealized Losses, Total	-19,281	-39,295
Number of held to maturity securities	78	80
Securities Held To Maturity, Less than 12 Months, Fair Value	698,818	669,220
Securities Held To Maturity, Less than 12 Months, Unrealized Losses	-13,945	-24,379
Securities Held To Maturity, Greater than 12 Months, Fair Value	82,658	15,674
Securities Held To Maturity, Greater than 12 Months, Unrealized Losses	-4,102	-711
Securities Held To Maturity, Fair Value, Total	781,476	684,894
Securities Held To Maturity, Unrealized Losses, Total	-18,047	-25,090
Less than 12 Months [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of held to maturity securities	72	78
Greater than 12 Months [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of held to maturity securities	6	2
U.S. Government-Sponsored Entities [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of available for sale securities, Less than 1 year	18	17
Number of available for sale securities, Greater than 1 year	'	'
Number of available for sale securities	18	17
Securities Available For Sale, Less than 12 Months, Fair Value	249,631	232,962
Securities Available For Sale, Less than 12 Months, Unrealized Losses	-3,699	-5,904
Securities Available For Sale, 12 Months or More, Fair Value	'	'
Securities Available For Sale, 12 Months or More, Unrealized Losses	'	'
Securities Available For Sale, Fair Value, Total	249,631	232,962
Securities Available For Sale, Unrealized Losses, Total	-3,699	-5,904
Number of held to maturity securities	8	3
Securities Held To Maturity, Less than 12 Months, Fair Value	73,748	24,513
Securities Held To Maturity, Less than 12 Months, Unrealized Losses	-788	-530
Securities Held To Maturity, Greater than 12 Months, Fair Value	14,504	14,378
Securities Held To Maturity, Greater than 12 Months, Unrealized Losses	-496	-621
Securities Held To Maturity, Fair Value, Total	88,252	38,891
Securities Held To Maturity, Unrealized Losses, Total	-1,284	-1,151
U.S. Government-Sponsored Entities [Member] | Less than 12 Months [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of held to maturity securities	7	2
U.S. Government-Sponsored Entities [Member] | Greater than 12 Months [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of held to maturity securities	1	1
Agency Mortgage-Backed Securities [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of available for sale securities, Less than 1 year	11	9
Number of available for sale securities, Greater than 1 year	'	'
Number of available for sale securities	11	9
Securities Available For Sale, Less than 12 Months, Fair Value	177,722	108,284
Securities Available For Sale, Less than 12 Months, Unrealized Losses	-905	-1,303
Securities Available For Sale, 12 Months or More, Fair Value	'	'
Securities Available For Sale, 12 Months or More, Unrealized Losses	'	'
Securities Available For Sale, Fair Value, Total	177,722	108,284
Securities Available For Sale, Unrealized Losses, Total	-905	-1,303
Number of held to maturity securities	24	25
Securities Held To Maturity, Less than 12 Months, Fair Value	347,721	308,864
Securities Held To Maturity, Less than 12 Months, Unrealized Losses	-3,745	-5,942
Securities Held To Maturity, Greater than 12 Months, Fair Value	1,304	1,296
Securities Held To Maturity, Greater than 12 Months, Unrealized Losses	-72	-90
Securities Held To Maturity, Fair Value, Total	349,025	310,160
Securities Held To Maturity, Unrealized Losses, Total	-3,817	-6,032
Agency Mortgage-Backed Securities [Member] | Less than 12 Months [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of held to maturity securities	23	24
Agency Mortgage-Backed Securities [Member] | Greater than 12 Months [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of held to maturity securities	1	1
Agency Collateralized Mortgage Obligations [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of available for sale securities, Less than 1 year	24	26
Number of available for sale securities, Greater than 1 year	4	2
Number of available for sale securities	28	28
Securities Available For Sale, Less than 12 Months, Fair Value	398,335	389,989
Securities Available For Sale, Less than 12 Months, Unrealized Losses	-9,937	-18,644
Securities Available For Sale, 12 Months or More, Fair Value	68,266	34,229
Securities Available For Sale, 12 Months or More, Unrealized Losses	-3,706	-2,150
Securities Available For Sale, Fair Value, Total	466,601	424,218
Securities Available For Sale, Unrealized Losses, Total	-13,643	-20,794
Number of held to maturity securities	24	21
Securities Held To Maturity, Less than 12 Months, Fair Value	249,082	301,312
Securities Held To Maturity, Less than 12 Months, Unrealized Losses	-8,442	-15,844
Securities Held To Maturity, Greater than 12 Months, Fair Value	66,850	'
Securities Held To Maturity, Greater than 12 Months, Unrealized Losses	-3,534	'
Securities Held To Maturity, Fair Value, Total	315,932	301,312
Securities Held To Maturity, Unrealized Losses, Total	-11,976	-15,844
Agency Collateralized Mortgage Obligations [Member] | Less than 12 Months [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of held to maturity securities	20	21
Agency Collateralized Mortgage Obligations [Member] | Greater than 12 Months [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of held to maturity securities	4	'
Commercial Mortgage-Backed Securities [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of available for sale securities, Less than 1 year	1	'
Number of available for sale securities, Greater than 1 year	'	'
Number of available for sale securities	1	'
Securities Available For Sale, Less than 12 Months, Fair Value	9,129	'
Securities Available For Sale, Less than 12 Months, Unrealized Losses	-24	'
Securities Available For Sale, 12 Months or More, Fair Value	'	'
Securities Available For Sale, 12 Months or More, Unrealized Losses	'	'
Securities Available For Sale, Fair Value, Total	9,129	'
Securities Available For Sale, Unrealized Losses, Total	-24	'
Number of held to maturity securities	1	1
Securities Held To Maturity, Less than 12 Months, Fair Value	1,005	984
Securities Held To Maturity, Less than 12 Months, Unrealized Losses	-15	-37
Securities Held To Maturity, Greater than 12 Months, Fair Value	'	'
Securities Held To Maturity, Greater than 12 Months, Unrealized Losses	'	'
Securities Held To Maturity, Fair Value, Total	1,005	984
Securities Held To Maturity, Unrealized Losses, Total	-15	-37
Commercial Mortgage-Backed Securities [Member] | Less than 12 Months [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of held to maturity securities	1	1
Commercial Mortgage-Backed Securities [Member] | Greater than 12 Months [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of held to maturity securities	'	'
States of the U.S. and Political Subdivisions [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of available for sale securities, Less than 1 year	2	2
Number of available for sale securities, Greater than 1 year	'	'
Number of available for sale securities	2	2
Securities Available For Sale, Less than 12 Months, Fair Value	3,123	3,022
Securities Available For Sale, Less than 12 Months, Unrealized Losses	-149	-250
Securities Available For Sale, 12 Months or More, Fair Value	'	'
Securities Available For Sale, 12 Months or More, Unrealized Losses	'	'
Securities Available For Sale, Fair Value, Total	3,123	3,022
Securities Available For Sale, Unrealized Losses, Total	-149	-250
Number of held to maturity securities	21	27
Securities Held To Maturity, Less than 12 Months, Fair Value	27,262	31,537
Securities Held To Maturity, Less than 12 Months, Unrealized Losses	-955	-2,022
Securities Held To Maturity, Greater than 12 Months, Fair Value	'	'
Securities Held To Maturity, Greater than 12 Months, Unrealized Losses	'	'
Securities Held To Maturity, Fair Value, Total	27,262	31,537
Securities Held To Maturity, Unrealized Losses, Total	-955	-2,022
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	21	27
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	'	'
Other Debt Securities [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of available for sale securities, Less than 1 year	'	'
Number of available for sale securities, Greater than 1 year	4	4
Number of available for sale securities	4	4
Securities Available For Sale, Less than 12 Months, Fair Value	'	'
Securities Available For Sale, Less than 12 Months, Unrealized Losses	'	'
Securities Available For Sale, 12 Months or More, Fair Value	6,020	5,950
Securities Available For Sale, 12 Months or More, Unrealized Losses	-861	-929
Securities Available For Sale, Fair Value, Total	6,020	5,950
Securities Available For Sale, Unrealized Losses, Total	-861	-929
Collateralized Debt Obligations [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of available for sale securities, Less than 1 year	'	'
Number of available for sale securities, Greater than 1 year	'	8
Number of available for sale securities	'	8
Securities Available For Sale, Less than 12 Months, Fair Value	'	'
Securities Available For Sale, Less than 12 Months, Unrealized Losses	'	'
Securities Available For Sale, 12 Months or More, Fair Value	'	7,965
Securities Available For Sale, 12 Months or More, Unrealized Losses	'	-10,115
Securities Available For Sale, Fair Value, Total	'	7,965
Securities Available For Sale, Unrealized Losses, Total	'	-10,115
Non-Agency Collateralized Mortgage Obligations [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of held to maturity securities	'	3
Securities Held To Maturity, Less than 12 Months, Fair Value	'	2,010
Securities Held To Maturity, Less than 12 Months, Unrealized Losses	'	-4
Securities Held To Maturity, Greater than 12 Months, Fair Value	'	'
Securities Held To Maturity, Greater than 12 Months, Unrealized Losses	'	'
Securities Held To Maturity, Fair Value, Total	'	2,010
Securities Held To Maturity, Unrealized Losses, Total	'	($4)
Non-Agency Collateralized Mortgage Obligations [Member] | Less than 12 Months [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of held to maturity securities	'	3
Non-Agency Collateralized Mortgage Obligations [Member] | Greater than 12 Months [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of held to maturity securities	'	'

Securities_Summary_of_Cumulati

Securities - Summary of Cumulative Credit-Related OTTI Charges (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]	'	'
Beginning balance	$17,182	$17,367
Loss where impairment was not previously recognized	'	'
Additional loss where impairment was previously recognized	'	'
Reduction due to credit impaired securities sold	-17,155	-212
Ending balance	27	17,155
Collateralized Debt Obligations [Member]	'	'
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]	'	'
Beginning balance	17,155	17,155
Loss where impairment was not previously recognized	'	'
Additional loss where impairment was previously recognized	'	'
Reduction due to credit impaired securities sold	-17,155	'
Ending balance	'	17,155
Residential Non-Agency Collateralized Mortgage Obligations [Member]	'	'
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]	'	'
Beginning balance	'	212
Loss where impairment was not previously recognized	'	'
Additional loss where impairment was previously recognized	'	'
Reduction due to credit impaired securities sold	'	-212
Ending balance	'	'
Equity Securities [Member]	'	'
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]	'	'
Beginning balance	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	'

Federal_Home_Loan_Bank_Stock_A

Federal Home Loan Bank Stock - Additional Information (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Statement Of Financial Position [Abstract]	'	'
Federal Home Loan Bank stock	$24,636	$23,636

Recovered_Sheet1

Loans and Allowance for Loan Losses - Summary of Loans, Net of Unearned Income (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	$9,943,136	$9,506,094
Commercial Real Estate [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	3,464,598	3,245,209
Commercial and Industrial [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	1,965,065	1,881,474
Commercial Leases [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	161,494	158,895
Total Commercial Loans and Leases [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	5,591,157	5,285,578
Direct Installment [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	1,467,558	1,467,236
Residential Mortgages [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	1,135,790	1,086,739
Indirect Installment [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	678,918	655,587
Consumer Lines of Credit [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	1,010,501	965,771
Other [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	59,212	45,183
Originated Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	8,344,398	8,154,765
Originated Loans [Member] | Commercial Real Estate [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	2,677,152	2,640,428
Originated Loans [Member] | Commercial and Industrial [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	1,848,332	1,761,668
Originated Loans [Member] | Commercial Leases [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	161,494	158,895
Originated Loans [Member] | Total Commercial Loans and Leases [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	4,686,978	4,560,991
Originated Loans [Member] | Direct Installment [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	1,386,940	1,387,995
Originated Loans [Member] | Residential Mortgages [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	688,038	678,227
Originated Loans [Member] | Indirect Installment [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	674,347	649,701
Originated Loans [Member] | Consumer Lines of Credit [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	848,883	832,668
Originated Loans [Member] | Other [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	59,212	45,183
Acquired Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	1,598,738	1,351,329
Acquired Loans [Member] | Commercial Real Estate [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	787,446	604,781
Acquired Loans [Member] | Commercial and Industrial [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	116,733	119,806
Acquired Loans [Member] | Commercial Leases [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	'	'
Acquired Loans [Member] | Total Commercial Loans and Leases [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	904,179	724,587
Acquired Loans [Member] | Direct Installment [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	80,618	79,241
Acquired Loans [Member] | Residential Mortgages [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	447,752	408,512
Acquired Loans [Member] | Indirect Installment [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	4,571	5,886
Acquired Loans [Member] | Consumer Lines of Credit [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	161,618	133,103
Acquired Loans [Member] | Other [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	'	'

Recovered_Sheet2

Loans and Allowance for Loan Losses - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans, net of unearned income	$9,943,136	'	$9,506,094
Outstanding contractual balance receivable of acquired loans	1,704,889	'	1,449,227
Commercial construction loans	270,913	'	252,842
Payoffs received on loans in excess of expected cash flows	242	'	440
Threshold period past due for default status of trade accounts receivable	'90 days	'90 days	'
Minimum corporation reserves for commercial loan	500	'	'
Minimum amount to allocate specific valuation allowance	500	'	'
Recorded Investment	9,525	'	'
Allowance for loan losses	5,096	'	5,900
Restructured loans returned to performing status	3,194	'	'
Specific reserves in allowance for loan losses, TDRs	523	'	561
Pooled reserves in allowance for loan losses, TDRs	188	'	193
Valuation for impairment of loans with pooled reserves	500	'	500
Pooled reserves for all other classes of loans	1,026	'	1,005
Commercial Real Estate [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans, net of unearned income	3,464,598	'	3,245,209
Recorded Investment	46,331	'	44,075
Allowance for loan losses	2,612	'	3,093
Commercial Real Estate [Member] | FLORIDA [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Commercial real estate loans	39,118	'	39,379
Percentage of loan portfolio	0.40%	'	0.40%
Commercial and Industrial [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans, net of unearned income	1,965,065	'	1,881,474
Recorded Investment	5,153	'	7,423
Allowance for loan losses	817	'	786
Direct Installment [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans, net of unearned income	1,467,558	'	1,467,236
Recorded Investment	12,047	'	10,577
Allowance for loan losses	906	'	727
Residential Mortgages [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans, net of unearned income	1,135,790	'	1,086,739
Recorded Investment	13,961	'	14,012
Allowance for loan losses	504	'	970
Indirect Installment [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans, net of unearned income	678,918	'	655,587
Recorded Investment	1,399	'	1,202
Allowance for loan losses	257	'	324
Consumer Lines of Credit [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans, net of unearned income	1,010,501	'	965,771
Percentage of loan portfolio	1.70%	'	1.90%
Consumer loans	171,228	'	179,970
Recorded Investment	922	'	597
Commercial Construction Loans [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Percentage of loan portfolio	2.70%	'	2.70%
Acquired Loans [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans, net of unearned income	1,593,642	'	1,345,429
Purchased Credit-Impaired Loans [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Carrying Amount	14,513	'	21,192
Outstanding contractual receivable of PCI loan	46,809	'	56,500
Recorded Investment	$15,221	'	$22,192
Owner-Occupied [Member] | Commercial Real Estate [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Percentage of loan portfolio	42.00%	'	43.10%
Non-Owner-Occupied [Member] | Commercial Real Estate [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Percentage of loan portfolio	58.00%	'	56.90%
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	'	'

Loans_and_Allowance_for_Loan_L2

Loans and Allowance for Loan Losses - Carrying Amounts at Acquisition of All Purchased Loans (Impaired and Non-Impaired) Acquired (Detail) (Acquired Loans [Member], Annapolis Bancorp Inc. And PVF Capital Corp. [Member], USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]	'
Contractually required cash flows at acquisition	$837,086
Non-accretable difference (expected losses and foregone interest)	-76,199
Cash flows expected to be collected at acquisition	760,887
Accretable yield	-115,352
Basis in acquired loans at acquisition	645,535
Impaired Loans [Member]	'
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]	'
Contractually required cash flows at acquisition	40,972
Non-accretable difference (expected losses and foregone interest)	-23,207
Cash flows expected to be collected at acquisition	17,765
Accretable yield	-2,505
Basis in acquired loans at acquisition	15,260
Performing Loans [Member]	'
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]	'
Contractually required cash flows at acquisition	796,114
Non-accretable difference (expected losses and foregone interest)	-52,992
Cash flows expected to be collected at acquisition	743,122
Accretable yield	-112,847
Basis in acquired loans at acquisition	$630,275

Loans_and_Allowance_for_Loan_L3

Loans and Allowance for Loan Losses - Summary of Change in Accretable Yield of Acquired Loans (Detail) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]	'	'
Balance at beginning of period	$305,646	$254,153
Acquisitions	'	115,352
Reduction due to unexpected early payoffs	-12,694	-42,582
Reclass from non-accretable difference	768	16,393
Disposals/transfers	-944	-592
Accretion	-15,913	-37,078
Balance at end of period	276,863	305,646
Acquired Impaired Loans [Member]	'	'
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]	'	'
Balance at beginning of period	7,456	778
Acquisitions	'	2,505
Reduction due to unexpected early payoffs	'	'
Reclass from non-accretable difference	332	8,097
Disposals/transfers	-759	-368
Accretion	-1,264	-3,556
Balance at end of period	5,765	7,456
Acquired Performing Loans [Member]	'	'
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]	'	'
Balance at beginning of period	298,190	253,375
Acquisitions	'	112,847
Reduction due to unexpected early payoffs	-12,694	-42,582
Reclass from non-accretable difference	436	8,296
Disposals/transfers	-185	-224
Accretion	-14,649	-33,522
Balance at end of period	$271,098	$298,190

Loans_and_Allowance_for_Loan_L4

Loans and Allowance for Loan Losses - Summary of Information about Corporation's Purchased Credit-Impaired Loans (Detail) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Balance at beginning of period	$305,646	$254,153
Accretion	15,913	37,078
Reclass from non-accretable difference	768	16,393
Disposals/transfers	-944	-592
Balance at end of period	276,863	305,646
Recorded Investment [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Balance at beginning of period	22,192	16,623
Acquisitions	'	15,260
Accretion	1,264	3,556
Payments received	-7,603	-9,325
Reclass from non-accretable difference	'	'
Disposals/transfers	-632	-3,922
Contractual interest	'	'
Balance at end of period	15,221	22,192
Accretable Yield [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Balance at beginning of period	-7,456	-778
Acquisitions	'	-2,505
Accretion	1,264	3,556
Payments received	'	'
Reclass from non-accretable difference	-332	-8,097
Disposals/transfers	759	368
Contractual interest	'	'
Balance at end of period	-5,765	-7,456
Expected Cash Flows [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Balance at beginning of period	29,648	17,401
Acquisitions	'	17,765
Accretion	'	'
Payments received	-7,603	-9,325
Reclass from non-accretable difference	332	8,097
Disposals/transfers	-1,391	-4,290
Contractual interest	'	'
Balance at end of period	20,896	29,648
Non-Accretable Difference [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Balance at beginning of period	-26,852	-23,733
Acquisitions	'	-24,266
Accretion	'	'
Payments received	437	1,345
Reclass from non-accretable difference	332	8,097
Disposals/transfers	1,129	14,405
Contractual interest	-869	-2,700
Balance at end of period	-25,823	-26,852
Outstanding Balance [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Balance at beginning of period	56,500	41,134
Acquisitions	'	42,031
Accretion	'	'
Payments received	-8,040	-10,670
Reclass from non-accretable difference	'	'
Disposals/transfers	-2,520	-18,695
Contractual interest	869	2,700
Balance at end of period	$46,809	$56,500

Loans_and_Allowance_for_Loan_L5

Loans and Allowance for Loan Losses - Summary of Non-Performing Assets (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled debt restructurings	$42,062	$41,623
Non-Performing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-accrual loans	60,039	58,755
Troubled debt restructurings	19,384	18,698
Total non-performing loans	79,423	77,453
Other real estate owned (OREO)	43,216	40,681
Total non-performing loans and OREO	122,639	118,134
Non-performing investments	'	797
Total non-performing assets	$122,639	$118,931
Non-performing loans as a percent of total loans	0.80%	0.81%
Non-performing loans + OREO as a percent of total loans + OREO	1.23%	1.24%
Non-performing assets as a percent of total assets	0.85%	0.88%

Loans_and_Allowance_for_Loan_L6

Loans and Allowance for Loan Losses - Age Analysis of Past Due Loans, by Class (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Loans	$9,943,136	$9,506,094
Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Loans	3,464,598	3,245,209
Commercial and Industrial [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Loans	1,965,065	1,881,474
Commercial Leases [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Loans	161,494	158,895
Total Commercial Loans and Leases [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Loans	5,591,157	5,285,578
Direct Installment [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Loans	1,467,558	1,467,236
Residential Mortgages [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Loans	1,135,790	1,086,739
Indirect Installment [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Loans	678,918	655,587
Consumer Lines of Credit [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Loans	1,010,501	965,771
Other [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Loans	59,212	45,183
Originated Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	32,490	37,342
> 90 Days Past Due and Still Accruing	5,467	7,971
Non- Accrual	60,039	58,755
Total Past Due	97,996	104,068
Current	8,246,402	8,050,697
Total Loans	8,344,398	8,154,765
Originated Loans [Member] | Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	6,297	5,428
> 90 Days Past Due and Still Accruing	243	252
Non- Accrual	43,385	40,960
Total Past Due	49,925	46,640
Current	2,627,227	2,593,788
Total Loans	2,677,152	2,640,428
Originated Loans [Member] | Commercial and Industrial [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	2,564	2,066
> 90 Days Past Due and Still Accruing	8	8
Non- Accrual	4,194	6,643
Total Past Due	6,766	8,717
Current	1,841,566	1,752,951
Total Loans	1,848,332	1,761,668
Originated Loans [Member] | Commercial Leases [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	1,150	714
> 90 Days Past Due and Still Accruing	'	'
Non- Accrual	744	734
Total Past Due	1,894	1,448
Current	159,600	157,447
Total Loans	161,494	158,895
Originated Loans [Member] | Total Commercial Loans and Leases [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	10,011	8,208
> 90 Days Past Due and Still Accruing	251	260
Non- Accrual	48,323	48,337
Total Past Due	58,585	56,805
Current	4,628,393	4,504,186
Total Loans	4,686,978	4,560,991
Originated Loans [Member] | Direct Installment [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	7,893	9,038
> 90 Days Past Due and Still Accruing	2,876	3,753
Non- Accrual	6,405	4,686
Total Past Due	17,174	17,477
Current	1,369,766	1,370,518
Total Loans	1,386,940	1,387,995
Originated Loans [Member] | Residential Mortgages [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	8,591	12,681
> 90 Days Past Due and Still Accruing	1,406	2,401
Non- Accrual	3,521	4,260
Total Past Due	13,518	19,342
Current	674,520	658,885
Total Loans	688,038	678,227
Originated Loans [Member] | Indirect Installment [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	3,762	5,653
> 90 Days Past Due and Still Accruing	240	471
Non- Accrual	1,259	1,060
Total Past Due	5,261	7,184
Current	669,086	642,517
Total Loans	674,347	649,701
Originated Loans [Member] | Consumer Lines of Credit [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	2,207	1,737
> 90 Days Past Due and Still Accruing	685	1,076
Non- Accrual	531	412
Total Past Due	3,423	3,225
Current	845,460	829,443
Total Loans	848,883	832,668
Originated Loans [Member] | Other [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	26	25
> 90 Days Past Due and Still Accruing	9	10
Non- Accrual	'	'
Total Past Due	35	35
Current	59,177	45,148
Total Loans	59,212	45,183
Acquired Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	34,668	30,205
> 90 Days Past Due and Still Accruing	61,629	45,823
Non- Accrual	'	'
Total Past Due	96,297	76,028
Current	1,608,592	1,373,199
Total Loans	1,598,738	1,351,329
Discount	-106,151	-97,898
Acquired Loans [Member] | Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	23,180	13,637
> 90 Days Past Due and Still Accruing	31,063	20,668
Non- Accrual	'	'
Total Past Due	54,243	34,305
Current	790,425	619,197
Total Loans	787,446	604,781
Discount	-57,222	-48,721
Acquired Loans [Member] | Commercial and Industrial [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	726	1,860
> 90 Days Past Due and Still Accruing	5,296	1,899
Non- Accrual	'	'
Total Past Due	6,022	3,759
Current	119,541	124,415
Total Loans	116,733	119,806
Discount	-8,830	-8,368
Acquired Loans [Member] | Commercial Leases [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	'	'
> 90 Days Past Due and Still Accruing	'	'
Non- Accrual	'	'
Total Past Due	'	'
Current	'	'
Total Loans	'	'
Discount	'	'
Acquired Loans [Member] | Total Commercial Loans and Leases [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	23,906	15,497
> 90 Days Past Due and Still Accruing	36,359	22,567
Non- Accrual	'	'
Total Past Due	60,265	38,064
Current	909,966	743,612
Total Loans	904,179	724,587
Discount	-66,052	-57,089
Acquired Loans [Member] | Direct Installment [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	1,112	1,447
> 90 Days Past Due and Still Accruing	957	1,178
Non- Accrual	'	'
Total Past Due	2,069	2,625
Current	76,628	74,917
Total Loans	80,618	79,241
Discount	1,921	1,699
Acquired Loans [Member] | Residential Mortgages [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	8,514	11,464
> 90 Days Past Due and Still Accruing	20,886	19,298
Non- Accrual	'	'
Total Past Due	29,400	30,762
Current	452,306	412,704
Total Loans	447,752	408,512
Discount	-33,954	-34,954
Acquired Loans [Member] | Indirect Installment [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	101	205
> 90 Days Past Due and Still Accruing	31	31
Non- Accrual	'	'
Total Past Due	132	236
Current	5,032	6,267
Total Loans	4,571	5,886
Discount	-593	-617
Acquired Loans [Member] | Consumer Lines of Credit [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	1,035	1,592
> 90 Days Past Due and Still Accruing	3,396	2,749
Non- Accrual	'	'
Total Past Due	4,431	4,341
Current	164,660	135,699
Total Loans	161,618	133,103
Discount	-7,473	-6,937
Acquired Loans [Member] | Other [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	'	'
> 90 Days Past Due and Still Accruing	'	'
Non- Accrual	'	'
Total Past Due	'	'
Current	'	'
Total Loans	'	'
Discount	'	'

Loans_and_Allowance_for_Loan_L7

Loans and Allowance for Loan Losses - Summary of Commercial Loans by Credit Quality (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Originated Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	$4,686,978	$4,560,991
Originated Loans [Member] | Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	2,677,152	2,640,428
Originated Loans [Member] | Commercial and Industrial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	1,848,332	1,761,668
Originated Loans [Member] | Commercial Leases [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	161,494	158,895
Acquired Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	904,179	724,587
Acquired Loans [Member] | Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	787,446	604,781
Acquired Loans [Member] | Commercial and Industrial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	116,733	119,806
Acquired Loans [Member] | Commercial Leases [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	'	'
Pass [Member] | Originated Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	4,348,866	4,244,509
Pass [Member] | Originated Loans [Member] | Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	2,501,710	2,476,988
Pass [Member] | Originated Loans [Member] | Commercial and Industrial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	1,688,867	1,611,530
Pass [Member] | Originated Loans [Member] | Commercial Leases [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	158,289	155,991
Pass [Member] | Acquired Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	674,575	543,347
Pass [Member] | Acquired Loans [Member] | Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	575,859	442,604
Pass [Member] | Acquired Loans [Member] | Commercial and Industrial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	98,716	100,743
Pass [Member] | Acquired Loans [Member] | Commercial Leases [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	'	'
Special Mention [Member] | Originated Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	170,157	155,760
Special Mention [Member] | Originated Loans [Member] | Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	70,417	56,140
Special Mention [Member] | Originated Loans [Member] | Commercial and Industrial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	97,558	97,675
Special Mention [Member] | Originated Loans [Member] | Commercial Leases [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	2,182	1,945
Special Mention [Member] | Acquired Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	98,726	80,497
Special Mention [Member] | Acquired Loans [Member] | Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	94,461	74,315
Special Mention [Member] | Acquired Loans [Member] | Commercial and Industrial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	4,265	6,182
Special Mention [Member] | Acquired Loans [Member] | Commercial Leases [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	'	'
Substandard [Member] | Originated Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	166,503	159,880
Substandard [Member] | Originated Loans [Member] | Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	103,838	106,599
Substandard [Member] | Originated Loans [Member] | Commercial and Industrial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	61,642	52,322
Substandard [Member] | Originated Loans [Member] | Commercial Leases [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	1,023	959
Substandard [Member] | Acquired Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	125,008	97,952
Substandard [Member] | Acquired Loans [Member] | Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	111,306	85,086
Substandard [Member] | Acquired Loans [Member] | Commercial and Industrial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	13,702	12,866
Substandard [Member] | Acquired Loans [Member] | Commercial Leases [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	'	'
Doubtful [Member] | Originated Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	1,452	842
Doubtful [Member] | Originated Loans [Member] | Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	1,187	701
Doubtful [Member] | Originated Loans [Member] | Commercial and Industrial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	265	141
Doubtful [Member] | Originated Loans [Member] | Commercial Leases [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	'	'
Doubtful [Member] | Acquired Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	5,870	2,791
Doubtful [Member] | Acquired Loans [Member] | Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	5,820	2,776
Doubtful [Member] | Acquired Loans [Member] | Commercial and Industrial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	50	15
Doubtful [Member] | Acquired Loans [Member] | Commercial Leases [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	'	'

Loans_and_Allowance_for_Loan_L8

Loans and Allowance for Loan Losses - Summary of Consumer Loans by Payment Status (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Credit Quality [Line Items]	'	'
Loans, net of unearned income	$9,943,136	$9,506,094
Non-Performing [Member]	'	'
Credit Quality [Line Items]	'	'
Non-Performing Loans	79,423	77,453
Direct Installment [Member]	'	'
Credit Quality [Line Items]	'	'
Loans, net of unearned income	1,467,558	1,467,236
Direct Installment [Member] | Performing [Member]	'	'
Credit Quality [Line Items]	'	'
Performing Loans	1,374,893	1,377,418
Direct Installment [Member] | Non-Performing [Member]	'	'
Credit Quality [Line Items]	'	'
Non-Performing Loans	12,047	10,577
Residential Mortgages [Member]	'	'
Credit Quality [Line Items]	'	'
Loans, net of unearned income	1,135,790	1,086,739
Residential Mortgages [Member] | Performing [Member]	'	'
Credit Quality [Line Items]	'	'
Performing Loans	674,077	664,214
Residential Mortgages [Member] | Non-Performing [Member]	'	'
Credit Quality [Line Items]	'	'
Non-Performing Loans	13,961	14,013
Indirect Installment [Member]	'	'
Credit Quality [Line Items]	'	'
Loans, net of unearned income	678,918	655,587
Indirect Installment [Member] | Performing [Member]	'	'
Credit Quality [Line Items]	'	'
Performing Loans	672,948	648,499
Indirect Installment [Member] | Non-Performing [Member]	'	'
Credit Quality [Line Items]	'	'
Non-Performing Loans	1,399	1,202
Consumer Lines of Credit [Member] | Performing [Member]	'	'
Credit Quality [Line Items]	'	'
Performing Loans	847,961	832,071
Consumer Lines of Credit [Member] | Non-Performing [Member]	'	'
Credit Quality [Line Items]	'	'
Non-Performing Loans	922	597
Other [Member]	'	'
Credit Quality [Line Items]	'	'
Loans, net of unearned income	59,212	45,183
Other [Member] | Performing [Member]	'	'
Credit Quality [Line Items]	'	'
Performing Loans	59,212	45,183
Other [Member] | Non-Performing [Member]	'	'
Credit Quality [Line Items]	'	'
Non-Performing Loans	'	'
Originated Loans [Member]	'	'
Credit Quality [Line Items]	'	'
Loans, net of unearned income	8,344,398	8,154,765
Originated Loans [Member] | Direct Installment [Member]	'	'
Credit Quality [Line Items]	'	'
Loans, net of unearned income	1,386,940	1,387,995
Originated Loans [Member] | Residential Mortgages [Member]	'	'
Credit Quality [Line Items]	'	'
Loans, net of unearned income	688,038	678,227
Originated Loans [Member] | Indirect Installment [Member]	'	'
Credit Quality [Line Items]	'	'
Loans, net of unearned income	674,347	649,701
Originated Loans [Member] | Consumer Lines of Credit [Member]	'	'
Credit Quality [Line Items]	'	'
Loans, net of unearned income	848,883	832,668
Originated Loans [Member] | Other [Member]	'	'
Credit Quality [Line Items]	'	'
Loans, net of unearned income	$59,212	$45,183

Loans_and_Allowance_for_Loan_L9

Loans and Allowance for Loan Losses - Summary of Impaired Loans, by Class (Detail) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Financial Receivables Impaired Or Restructured [Line Items]	'	'
With allowance recorded, Specific Related Allowance	$1,268	$824
Recorded Investment	9,525	'
Specific Related Allowance	1,268	'
Commercial Real Estate [Member]	'	'
Financial Receivables Impaired Or Restructured [Line Items]	'	'
With no allowance recorded, Recorded Investment	36,987	40,472
With no allowance recorded, Unpaid Principal Balance	50,287	62,034
With no allowance recorded, Specific Related Allowance	'	'
With no allowance recorded, Average Recorded Investment	38,730	37,376
With allowance recorded, Recorded Investment	9,344	3,603
With allowance recorded, Unpaid Principal Balance	19,951	3,818
With allowance recorded, Specific Related Allowance	1,087	701
With allowance recorded, Average Recorded Investment	6,474	14,379
Recorded Investment	46,331	44,075
Unpaid Principal Balance	70,238	65,852
Specific Related Allowance	1,087	701
Average Recorded Investment	45,204	51,755
Commercial and Industrial [Member]	'	'
Financial Receivables Impaired Or Restructured [Line Items]	'	'
With no allowance recorded, Recorded Investment	4,972	7,301
With no allowance recorded, Unpaid Principal Balance	6,613	8,669
With no allowance recorded, Specific Related Allowance	'	'
With no allowance recorded, Average Recorded Investment	6,136	8,304
With allowance recorded, Recorded Investment	181	122
With allowance recorded, Unpaid Principal Balance	190	130
With allowance recorded, Specific Related Allowance	181	123
With allowance recorded, Average Recorded Investment	152	126
Recorded Investment	5,153	7,423
Unpaid Principal Balance	6,803	8,799
Specific Related Allowance	181	123
Average Recorded Investment	6,288	8,430
Commercial Leases [Member]	'	'
Financial Receivables Impaired Or Restructured [Line Items]	'	'
With no allowance recorded, Recorded Investment	744	734
With no allowance recorded, Unpaid Principal Balance	744	734
With no allowance recorded, Specific Related Allowance	'	'
With no allowance recorded, Average Recorded Investment	739	758
With allowance recorded, Recorded Investment	'	'
With allowance recorded, Unpaid Principal Balance	'	'
With allowance recorded, Specific Related Allowance	'	'
With allowance recorded, Average Recorded Investment	'	'
Recorded Investment	744	734
Unpaid Principal Balance	744	734
Average Recorded Investment	739	758
Total Commercial Loans and Leases [Member]	'	'
Financial Receivables Impaired Or Restructured [Line Items]	'	'
With no allowance recorded, Recorded Investment	42,703	48,507
With no allowance recorded, Unpaid Principal Balance	57,644	71,437
With no allowance recorded, Specific Related Allowance	'	'
With no allowance recorded, Average Recorded Investment	45,605	46,438
With allowance recorded, Recorded Investment	9,525	3,725
With allowance recorded, Unpaid Principal Balance	20,141	3,948
With allowance recorded, Specific Related Allowance	1,268	824
With allowance recorded, Average Recorded Investment	6,626	14,505
Recorded Investment	52,228	52,232
Unpaid Principal Balance	77,785	75,385
Specific Related Allowance	1,268	824
Average Recorded Investment	52,231	60,943
Direct Installment [Member]	'	'
Financial Receivables Impaired Or Restructured [Line Items]	'	'
With no allowance recorded, Recorded Investment	12,047	10,577
With no allowance recorded, Unpaid Principal Balance	12,150	10,830
With no allowance recorded, Specific Related Allowance	'	'
With no allowance recorded, Average Recorded Investment	11,312	10,557
Recorded Investment	12,047	10,577
Unpaid Principal Balance	12,150	10,830
Average Recorded Investment	11,312	10,557
Residential Mortgages [Member]	'	'
Financial Receivables Impaired Or Restructured [Line Items]	'	'
With no allowance recorded, Recorded Investment	13,961	14,012
With no allowance recorded, Unpaid Principal Balance	14,507	14,560
With no allowance recorded, Specific Related Allowance	'	'
With no allowance recorded, Average Recorded Investment	88,787	13,565
Recorded Investment	13,961	14,012
Unpaid Principal Balance	14,507	14,560
Average Recorded Investment	88,787	13,565
Indirect Installment [Member]	'	'
Financial Receivables Impaired Or Restructured [Line Items]	'	'
With no allowance recorded, Recorded Investment	1,399	1,202
With no allowance recorded, Unpaid Principal Balance	2,861	2,633
With no allowance recorded, Specific Related Allowance	'	'
With no allowance recorded, Average Recorded Investment	1,301	1,127
Recorded Investment	1,399	1,202
Unpaid Principal Balance	2,861	2,633
Average Recorded Investment	1,301	1,127
Consumer Lines of Credit [Member]	'	'
Financial Receivables Impaired Or Restructured [Line Items]	'	'
With no allowance recorded, Recorded Investment	922	597
With no allowance recorded, Unpaid Principal Balance	1,000	668
With no allowance recorded, Specific Related Allowance	'	'
With no allowance recorded, Average Recorded Investment	760	573
Recorded Investment	922	597
Unpaid Principal Balance	1,000	668
Average Recorded Investment	760	573
Other [Member]	'	'
Financial Receivables Impaired Or Restructured [Line Items]	'	'
With no allowance recorded, Recorded Investment	'	'
With no allowance recorded, Unpaid Principal Balance	'	'
With no allowance recorded, Specific Related Allowance	'	'
With no allowance recorded, Average Recorded Investment	'	'
Recorded Investment	'	'
Unpaid Principal Balance	'	'
Specific Related Allowance	'	'
Average Recorded Investment	'	'

Recovered_Sheet3

Loans and Allowance for Loan Losses - Summary of Composition of Total TDRs (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Modifications [Line Items]	'	'
Troubled debt restructurings ("TDRs")	$42,062	$41,623
Performing [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled debt restructurings ("TDRs")	10,289	10,220
Non-Performing [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled debt restructurings ("TDRs")	19,384	18,698
Non-Accrual [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled debt restructurings ("TDRs")	$12,389	$12,705

Recovered_Sheet4

Loans and Allowance for Loan Losses - Summary of Troubled Debt Restructurings by Class of Loans (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
	Contract	Contract
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	151	148
Pre-Modification Outstanding Recorded Investment	$2,471	$3,031
Post-Modification Outstanding Recorded Investment	2,436	2,992
Commercial Real Estate [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	1	5
Pre-Modification Outstanding Recorded Investment	188	1,029
Post-Modification Outstanding Recorded Investment	188	905
Commercial and Industrial [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	1	'
Pre-Modification Outstanding Recorded Investment	52	'
Post-Modification Outstanding Recorded Investment	50	'
Total Commercial Loans and Leases [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	2	5
Pre-Modification Outstanding Recorded Investment	240	1,029
Post-Modification Outstanding Recorded Investment	238	905
Direct Installment [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	126	110
Pre-Modification Outstanding Recorded Investment	1,678	1,176
Post-Modification Outstanding Recorded Investment	1,647	1,150
Residential Mortgages [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	9	14
Pre-Modification Outstanding Recorded Investment	281	597
Post-Modification Outstanding Recorded Investment	280	709
Indirect Installment [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	7	10
Pre-Modification Outstanding Recorded Investment	17	56
Post-Modification Outstanding Recorded Investment	16	56
Consumer Lines of Credit [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	7	9
Pre-Modification Outstanding Recorded Investment	255	173
Post-Modification Outstanding Recorded Investment	$255	$172

Recovered_Sheet5

Loans and Allowance for Loan Losses - Summary of Troubled Debt Restructurings by Class of Loans, Payment Default (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013
	Contract		Contract
Financing Receivable, Modifications [Line Items]	'		'
Number of Contracts	19	[1]	28	[1]
Recorded Investment	$171	[1]	$314	[1]
Commercial Real Estate [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Number of Contracts	'		'	[1]
Recorded Investment	'	[1]	'
Commercial and Industrial [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Number of Contracts	'		1	[1]
Recorded Investment	'		33	[1]
Total Commercial Loans and Leases [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Number of Contracts	'		1	[1]
Recorded Investment	'		33	[1]
Direct Installment [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Number of Contracts	18	[1]	21	[1]
Recorded Investment	171	[1]	170	[1]
Residential Mortgages [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Number of Contracts	'		2	[1]
Recorded Investment	'		93	[1]
Indirect Installment [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Number of Contracts	1	[1]	4	[1]
Recorded Investment	'		18	[1]
Consumer Lines of Credit [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Number of Contracts	'		'	[1]
Recorded Investment	'	[1]	'
[1]	The recorded investment is as of period end.

Recovered_Sheet6

Loans and Allowance for Loan Losses - Summary of Changes in Allowance for Loan Losses by Class (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Schedule Of Allowance For Loan Losses [Line Items]	'	'
Balance at Beginning of Year	$110,784	$104,374
Charge- Offs	-7,103	-6,804
Recoveries	1,532	2,591
Net Charge- Offs	-5,571	-4,213
Provision for loan losses	7,006	7,541
Balance at End of Year	112,219	107,702
Originated Loans [Member]	'	'
Schedule Of Allowance For Loan Losses [Line Items]	'	'
Balance at Beginning of Year	104,884	100,194
Charge- Offs	-6,863	-6,435
Recoveries	1,246	2,387
Net Charge- Offs	-5,617	-4,048
Provision for loan losses	7,856	6,358
Balance at End of Year	107,123	102,504
Acquired Loans [Member]	'	'
Schedule Of Allowance For Loan Losses [Line Items]	'	'
Balance at Beginning of Year	5,900	4,180
Charge- Offs	-240	-369
Recoveries	286	204
Net Charge- Offs	46	-165
Provision for loan losses	-850	1,183
Balance at End of Year	5,096	5,198
Commercial Real Estate [Member]	'	'
Schedule Of Allowance For Loan Losses [Line Items]	'	'
Balance at Beginning of Year	32,548	34,810
Charge- Offs	-2,223	-2,287
Recoveries	299	1,427
Net Charge- Offs	-1,924	-860
Provision for loan losses	7,910	6,062
Balance at End of Year	38,534	40,012
Commercial and Industrial [Member]	'	'
Schedule Of Allowance For Loan Losses [Line Items]	'	'
Balance at Beginning of Year	32,603	31,849
Charge- Offs	-513	-208
Recoveries	370	356
Net Charge- Offs	-143	148
Provision for loan losses	-2,489	-3,159
Balance at End of Year	29,971	28,838
Commercial Leases [Member]	'	'
Schedule Of Allowance For Loan Losses [Line Items]	'	'
Balance at Beginning of Year	1,903	1,744
Charge- Offs	-87	-57
Recoveries	29	62
Net Charge- Offs	-58	5
Provision for loan losses	99	-53
Balance at End of Year	1,944	1,696
Total Commercial Loans and Leases [Member]	'	'
Schedule Of Allowance For Loan Losses [Line Items]	'	'
Balance at Beginning of Year	67,054	68,403
Charge- Offs	-2,823	-2,552
Recoveries	698	1,845
Net Charge- Offs	-2,125	-707
Provision for loan losses	5,520	2,850
Balance at End of Year	70,449	70,546
Direct Installment [Member]	'	'
Schedule Of Allowance For Loan Losses [Line Items]	'	'
Balance at Beginning of Year	17,824	15,130
Charge- Offs	-2,521	-2,345
Recoveries	267	233
Net Charge- Offs	-2,254	-2,112
Provision for loan losses	1,060	2,082
Balance at End of Year	16,630	15,100
Residential Mortgages [Member]	'	'
Schedule Of Allowance For Loan Losses [Line Items]	'	'
Balance at Beginning of Year	5,836	5,155
Charge- Offs	-132	-209
Recoveries	4	29
Net Charge- Offs	-128	-180
Provision for loan losses	-401	3
Balance at End of Year	5,307	4,978
Indirect Installment [Member]	'	'
Schedule Of Allowance For Loan Losses [Line Items]	'	'
Balance at Beginning of Year	6,409	5,449
Charge- Offs	-802	-810
Recoveries	217	193
Net Charge- Offs	-585	-617
Provision for loan losses	676	320
Balance at End of Year	6,500	5,152
Consumer Lines of Credit [Member]	'	'
Schedule Of Allowance For Loan Losses [Line Items]	'	'
Balance at Beginning of Year	7,231	6,057
Charge- Offs	-323	-342
Recoveries	55	87
Net Charge- Offs	-268	-255
Provision for loan losses	695	243
Balance at End of Year	7,658	6,045
Other [Member]	'	'
Schedule Of Allowance For Loan Losses [Line Items]	'	'
Balance at Beginning of Year	530	'
Charge- Offs	-262	-177
Recoveries	5	'
Net Charge- Offs	-257	-177
Provision for loan losses	306	860
Balance at End of Year	579	683
Purchased Credit-Impaired Loans [Member]	'	'
Schedule Of Allowance For Loan Losses [Line Items]	'	'
Balance at Beginning of Year	1,000	759
Charge- Offs	-249	-156
Recoveries	'	'
Net Charge- Offs	-249	-156
Provision for loan losses	-43	-20
Balance at End of Year	708	583
Other Acquired Loans [Member]	'	'
Schedule Of Allowance For Loan Losses [Line Items]	'	'
Balance at Beginning of Year	4,900	3,421
Charge- Offs	9	-213
Recoveries	286	204
Net Charge- Offs	295	-9
Provision for loan losses	-807	1,203
Balance at End of Year	$4,388	$4,615

Recovered_Sheet7

Loans and Allowance for Loan Losses - Summary of Individual and Collective Allowance for Loan Losses and Loan Balances by Class (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Valuation Allowance [Line Items]	'	'
Allowance, Individually Evaluated for Impairment	$1,268	$824
Allowance, Collectively Evaluated for Impairment	105,855	104,060
Loans	9,943,136	9,506,094
Loans Outstanding, Individually Evaluated for Impairment	35,766	34,376
Loans Outstanding, Collectively Evaluated for Impairment	8,308,632	8,120,389
Commercial Real Estate [Member]	'	'
Valuation Allowance [Line Items]	'	'
Allowance, Individually Evaluated for Impairment	1,087	701
Allowance, Collectively Evaluated for Impairment	37,446	31,847
Loans	3,464,598	3,245,209
Loans Outstanding, Individually Evaluated for Impairment	34,062	30,133
Loans Outstanding, Collectively Evaluated for Impairment	2,643,090	2,610,295
Commercial and Industrial [Member]	'	'
Valuation Allowance [Line Items]	'	'
Allowance, Individually Evaluated for Impairment	181	123
Allowance, Collectively Evaluated for Impairment	29,791	32,480
Loans	1,965,065	1,881,474
Loans Outstanding, Individually Evaluated for Impairment	1,704	4,243
Loans Outstanding, Collectively Evaluated for Impairment	1,846,628	1,757,425
Commercial Leases [Member]	'	'
Valuation Allowance [Line Items]	'	'
Allowance, Individually Evaluated for Impairment	'	'
Allowance, Collectively Evaluated for Impairment	1,945	1,903
Loans	161,494	158,895
Loans Outstanding, Collectively Evaluated for Impairment	161,494	158,895
Total Commercial Loans and Leases [Member]	'	'
Valuation Allowance [Line Items]	'	'
Allowance, Individually Evaluated for Impairment	1,268	824
Allowance, Collectively Evaluated for Impairment	69,182	66,230
Loans	5,591,157	5,285,578
Loans Outstanding, Individually Evaluated for Impairment	35,766	34,376
Loans Outstanding, Collectively Evaluated for Impairment	4,651,212	4,526,615
Direct Installment [Member]	'	'
Valuation Allowance [Line Items]	'	'
Allowance, Collectively Evaluated for Impairment	16,629	17,824
Loans	1,467,558	1,467,236
Loans Outstanding, Collectively Evaluated for Impairment	1,386,940	1,387,995
Residential Mortgages [Member]	'	'
Valuation Allowance [Line Items]	'	'
Allowance, Collectively Evaluated for Impairment	5,307	5,836
Loans	1,135,790	1,086,739
Loans Outstanding, Collectively Evaluated for Impairment	688,038	678,227
Indirect Installment [Member]	'	'
Valuation Allowance [Line Items]	'	'
Allowance, Collectively Evaluated for Impairment	6,500	6,409
Loans	678,918	655,587
Loans Outstanding, Collectively Evaluated for Impairment	674,347	649,701
Consumer Lines of Credit [Member]	'	'
Valuation Allowance [Line Items]	'	'
Allowance, Collectively Evaluated for Impairment	7,658	7,231
Loans	1,010,501	965,771
Loans Outstanding, Collectively Evaluated for Impairment	848,883	832,668
Other [Member]	'	'
Valuation Allowance [Line Items]	'	'
Allowance, Collectively Evaluated for Impairment	579	530
Loans	59,212	45,183
Loans Outstanding, Collectively Evaluated for Impairment	59,212	45,183
Originated Loans [Member]	'	'
Valuation Allowance [Line Items]	'	'
Loans	8,344,398	8,154,765
Originated Loans [Member] | Commercial Real Estate [Member]	'	'
Valuation Allowance [Line Items]	'	'
Loans	2,677,152	2,640,428
Originated Loans [Member] | Commercial and Industrial [Member]	'	'
Valuation Allowance [Line Items]	'	'
Loans	1,848,332	1,761,668
Originated Loans [Member] | Commercial Leases [Member]	'	'
Valuation Allowance [Line Items]	'	'
Loans	161,494	158,895
Originated Loans [Member] | Total Commercial Loans and Leases [Member]	'	'
Valuation Allowance [Line Items]	'	'
Loans	4,686,978	4,560,991
Originated Loans [Member] | Direct Installment [Member]	'	'
Valuation Allowance [Line Items]	'	'
Loans	1,386,940	1,387,995
Originated Loans [Member] | Residential Mortgages [Member]	'	'
Valuation Allowance [Line Items]	'	'
Loans	688,038	678,227
Originated Loans [Member] | Indirect Installment [Member]	'	'
Valuation Allowance [Line Items]	'	'
Loans	674,347	649,701
Originated Loans [Member] | Consumer Lines of Credit [Member]	'	'
Valuation Allowance [Line Items]	'	'
Loans	848,883	832,668
Originated Loans [Member] | Other [Member]	'	'
Valuation Allowance [Line Items]	'	'
Loans	$59,212	$45,183

Borrowings_Summary_of_ShortTer

Borrowings - Summary of Short-Term Borrowings (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Debt Disclosure [Abstract]	'	'
Securities sold under repurchase agreements	$787,712	$841,741
Federal funds purchased	300,000	270,000
Subordinated notes	128,912	129,498
Short-term borrowings	$1,216,624	$1,241,239

Borrowings_Summary_of_LongTerm

Borrowings - Summary of Long-Term Debt (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Debt Disclosure [Abstract]	'	'
Federal Home Loan Bank advances	$150,073	$50,076
Subordinated notes	85,679	84,637
Other subordinated debt	'	8,637
Convertible debt	'	578
Long-term debt	$235,752	$143,928

Borrowings_Additional_Informat

Borrowings - Additional Information (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Debt Disclosure [Abstract]	'	'
Credit available with FHLB	$3,574,396	'
Credit with FHLB used	$150,073	$50,076
Federal Home Loan Bank advances are scheduled to mature periodically through the year	'2019	'
Effective interest rates, minimum	0.95%	1.06%
Effective interest rates, maximum	4.19%	4.19%

Junior_Subordinated_Debt_Addit

Junior Subordinated Debt - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
	Trust
Subordinated Borrowing [Line Items]	'	'
Number of unconsolidated subsidiary trusts	3	'
Percent of the common equity of each Trust owned by the Corporation	100.00%	'
Redemption of Corporation Issued TPS	$23,000	$130,000
BCSB Acquisition [Member]	'	'
Subordinated Borrowing [Line Items]	'	'
Junior subordinated debt assumed in acquisition	$6,500	'

Junior_Subordinated_Debt_Junio

Junior Subordinated Debt - Junior Subordinated Debt Trusts (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified			F.N.B. Statutory Trust II [Member]	Omega Financial Capital Trust I [Member]	BCSB Capital Trust II [Member]
Subordinated Borrowing [Line Items]	'	'	'	'	'
Trust Preferred Securities	$67,500	'	$21,500	$36,000	$10,000
Common Securities	2,089	'	665	1,114	310
Junior subordinated debt	$68,517	$75,205	$22,165	$36,042	$10,310
Stated Maturity Date	'	'	15-Jun-36	18-Oct-34	7-Oct-33
Interest Rate	'	'	1.88%	2.43%	3.24%
Description of variable rate	'	'	'Variable; LIBOR + 165 basis points (bps)	'Variable; LIBOR + 219 bps	'Variable; LIBOR + 300 bps
Basis points	'	'	1.65%	2.19%	3.00%

Derivative_Instruments_Additio

Derivative Instruments - Additional Information (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Derivative [Line Items]	'	'
Notional amount of swaps	$840,190	'
Fair value of derivatives, in a net liability position	37,545	38,239
Collateral with derivative counterparties, fair value	35,068	37,427
Cash collateral posted	3,472	1,976
Additional amount in excess of posted collateral required in case of breached agreements	2,199	2,224
Swap [Member] | Short [Member]	'	'
Derivative [Line Items]	'	'
Number of swaps	318	'
Swap [Member] | Long [Member]	'	'
Derivative [Line Items]	'	'
Number of swaps	284	'
Notional amount of swaps	$1,040,190	'

Derivative_Instruments_Offsett

Derivative Instruments - Offsetting of Derivative Assets and Liabilities (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Derivatives, Fair Value [Line Items]	'	'
Gross Amount	$33,292	$33,317
Gross Amounts Offset in the Balance Sheet, Derivative Assets	'	'
Net Amount Presented in the Balance Sheet	33,292	33,317
Gross Amount	40,165	43,369
Gross Amounts Offset in the Balance Sheet, Derivative Liabilities	'	'
Net Amount Presented in the Balance Sheet	40,165	43,369
Derivative Assets Subject to Master Netting Arrangement [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Net Amount Presented in the Balance Sheet	2,213	3,579
Derivative Assets Subject to Master Netting Arrangement [Member] | Interest Rate Contracts [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Gross Amount	2,172	3,547
Gross Amounts Offset in the Balance Sheet, Derivative Assets	'	'
Net Amount Presented in the Balance Sheet	2,172	3,547
Derivative Assets Subject to Master Netting Arrangement [Member] | Equity Contracts [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Gross Amount	41	32
Gross Amounts Offset in the Balance Sheet, Derivative Assets	'	'
Net Amount Presented in the Balance Sheet	41	32
Derivative Assets Not Subject to Master Netting Arrangement [Member] | Interest Rate Contracts [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Gross Amount	31,079	29,738
Gross Amounts Offset in the Balance Sheet, Derivative Assets	'	'
Net Amount Presented in the Balance Sheet	31,079	29,738
Derivative Liabilities Subject to Master Netting Arrangement [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Net Amount Presented in the Balance Sheet	38,332	40,323
Derivative Liabilities Subject to Master Netting Arrangement [Member] | Interest Rate Contracts [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Gross Amount	38,332	40,323
Gross Amounts Offset in the Balance Sheet, Derivative Liabilities	'	'
Net Amount Presented in the Balance Sheet	38,332	40,323
Derivative Liabilities Not Subject to Master Netting Arrangement [Member] | Interest Rate Contracts [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Gross Amount	1,792	3,014
Gross Amounts Offset in the Balance Sheet, Derivative Liabilities	'	'
Net Amount Presented in the Balance Sheet	1,792	3,014
Derivative Liabilities Not Subject to Master Netting Arrangement [Member] | Equity Contracts [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Gross Amount	41	32
Gross Amounts Offset in the Balance Sheet, Derivative Liabilities	'	'
Net Amount Presented in the Balance Sheet	$41	$32

Derivative_Instruments_Derivat

Derivative Instruments - Derivative Assets (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	$33,292	$33,317
Gross Amounts Not Offset in the Balance Sheet Cash Collateral Received, Derivative Assets	133	53
Net Amount, Derivative Assets	'	82
Derivative Assets Subject to Master Netting Arrangement [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	2,213	3,579
Gross Amounts Not Offset in the Balance Sheet Financial Instruments, Derivative Assets	2,080	3,444
Counterparty B [Member]	'	'
Derivative [Line Items]	'	'
Gross Amounts Not Offset in the Balance Sheet Cash Collateral Received, Derivative Assets	'	'
Net Amount, Derivative Assets	'	'
Counterparty B [Member] | Derivative Assets Subject to Master Netting Arrangement [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	17	24
Gross Amounts Not Offset in the Balance Sheet Financial Instruments, Derivative Assets	17	24
Counterparty D [Member]	'	'
Derivative [Line Items]	'	'
Gross Amounts Not Offset in the Balance Sheet Cash Collateral Received, Derivative Assets	'	'
Net Amount, Derivative Assets	'	'
Counterparty D [Member] | Derivative Assets Subject to Master Netting Arrangement [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	246	566
Gross Amounts Not Offset in the Balance Sheet Financial Instruments, Derivative Assets	246	566
Counterparty E [Member]	'	'
Derivative [Line Items]	'	'
Gross Amounts Not Offset in the Balance Sheet Cash Collateral Received, Derivative Assets	'	'
Net Amount, Derivative Assets	'	'
Counterparty E [Member] | Derivative Assets Subject to Master Netting Arrangement [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	1,046	1,696
Gross Amounts Not Offset in the Balance Sheet Financial Instruments, Derivative Assets	1,046	1,696
Counterparty F [Member]	'	'
Derivative [Line Items]	'	'
Gross Amounts Not Offset in the Balance Sheet Cash Collateral Received, Derivative Assets	'	'
Net Amount, Derivative Assets	'	82
Counterparty F [Member] | Derivative Assets Subject to Master Netting Arrangement [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	233	355
Gross Amounts Not Offset in the Balance Sheet Financial Instruments, Derivative Assets	233	273
Counterparty G [Member]	'	'
Derivative [Line Items]	'	'
Gross Amounts Not Offset in the Balance Sheet Cash Collateral Received, Derivative Assets	'	'
Net Amount, Derivative Assets	'	'
Counterparty G [Member] | Derivative Assets Subject to Master Netting Arrangement [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	133	251
Gross Amounts Not Offset in the Balance Sheet Financial Instruments, Derivative Assets	133	251
Counterparty I [Member]	'	'
Derivative [Line Items]	'	'
Gross Amounts Not Offset in the Balance Sheet Cash Collateral Received, Derivative Assets	'	'
Net Amount, Derivative Assets	'	'
Counterparty I [Member] | Derivative Assets Subject to Master Netting Arrangement [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	405	634
Gross Amounts Not Offset in the Balance Sheet Financial Instruments, Derivative Assets	405	634
Counterparty J [Member]	'	'
Derivative [Line Items]	'	'
Gross Amounts Not Offset in the Balance Sheet Cash Collateral Received, Derivative Assets	133	53
Net Amount, Derivative Assets	'	'
Counterparty J [Member] | Derivative Assets Subject to Master Netting Arrangement [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	133	53
Gross Amounts Not Offset in the Balance Sheet Financial Instruments, Derivative Assets	'	'

Derivative_Instruments_Derivat1

Derivative Instruments - Derivative Liabilities (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	$40,165	$43,369
Derivative Liabilities Subject to Master Netting Arrangement [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	38,332	40,323
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities	33,541	36,581
Gross Amount Not Offset in the Balance Sheet Cash Collateral Pledged, Derivative Liabilities	2,672	1,610
Net Amount, Derivative Liabilities	2,119	2,132
Derivative Liabilities Subject to Master Netting Arrangement [Member] | Counterparty A [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	4,682	4,934
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities	4,682	4,934
Gross Amount Not Offset in the Balance Sheet Cash Collateral Pledged, Derivative Liabilities	'	'
Net Amount, Derivative Liabilities	'	'
Derivative Liabilities Subject to Master Netting Arrangement [Member] | Counterparty B [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	3,005	3,249
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities	3,005	3,249
Gross Amount Not Offset in the Balance Sheet Cash Collateral Pledged, Derivative Liabilities	'	'
Net Amount, Derivative Liabilities	'	'
Derivative Liabilities Subject to Master Netting Arrangement [Member] | Counterparty C [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	1,356	1,431
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities	1,356	1,431
Gross Amount Not Offset in the Balance Sheet Cash Collateral Pledged, Derivative Liabilities	'	'
Net Amount, Derivative Liabilities	'	'
Derivative Liabilities Subject to Master Netting Arrangement [Member] | Counterparty D [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	8,855	9,614
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities	8,855	9,614
Gross Amount Not Offset in the Balance Sheet Cash Collateral Pledged, Derivative Liabilities	'	'
Net Amount, Derivative Liabilities	'	'
Derivative Liabilities Subject to Master Netting Arrangement [Member] | Counterparty E [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	5,093	6,257
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities	5,093	6,257
Gross Amount Not Offset in the Balance Sheet Cash Collateral Pledged, Derivative Liabilities	'	'
Net Amount, Derivative Liabilities	'	'
Derivative Liabilities Subject to Master Netting Arrangement [Member] | Counterparty F [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	15	13
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities	15	13
Gross Amount Not Offset in the Balance Sheet Cash Collateral Pledged, Derivative Liabilities	'	'
Net Amount, Derivative Liabilities	'	'
Derivative Liabilities Subject to Master Netting Arrangement [Member] | Counterparty G [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	4,804	5,309
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities	4,804	5,309
Gross Amount Not Offset in the Balance Sheet Cash Collateral Pledged, Derivative Liabilities	'	'
Net Amount, Derivative Liabilities	'	'
Derivative Liabilities Subject to Master Netting Arrangement [Member] | Counterparty H [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	2,119	2,257
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities	'	125
Gross Amount Not Offset in the Balance Sheet Cash Collateral Pledged, Derivative Liabilities	'	'
Net Amount, Derivative Liabilities	2,119	2,132
Derivative Liabilities Subject to Master Netting Arrangement [Member] | Counterparty I [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	5,731	5,649
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities	5,731	5,649
Gross Amount Not Offset in the Balance Sheet Cash Collateral Pledged, Derivative Liabilities	'	'
Net Amount, Derivative Liabilities	'	'
Derivative Liabilities Subject to Master Netting Arrangement [Member] | Counterparty J [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	2,672	1,610
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities	'	'
Gross Amount Not Offset in the Balance Sheet Cash Collateral Pledged, Derivative Liabilities	2,672	1,610
Net Amount, Derivative Liabilities	'	'

Derivative_Instruments_Effect_

Derivative Instruments - Effect of Corporation's Derivative Financial Instruments on Income Statement (Detail) (Interest Rate Contracts [Member], Other Income [Member], USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Interest Rate Contracts [Member] | Other Income [Member]	'	'
Derivative [Line Items]	'	'
Interest Rate Products	($14)	$136

Recovered_Sheet8

Commitments, Credit Risk and Contingencies - Summary of Off-Balance Sheet Credit Risk Information (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Commitments to Extend Credit [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Extended credit and standby letters of credit	$3,103,359	$2,897,748
Standby Letters of Credit [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Extended credit and standby letters of credit	$118,281	$114,298

Recovered_Sheet9

Commitments, Credit Risk and Contingencies - Additional Information (Detail)	Mar. 31, 2014
Commitments And Contingencies Disclosure [Abstract]	'
Percentage of Commitments to extend credit dependent upon the financial condition of the customers	76.10%

Stock_Incentive_Plans_Addition

Stock Incentive Plans - Additional Information (Detail) (USD $)

3 Months Ended

3 Months Ended

In Thousands, except Share data, unless otherwise specified

Mar. 31, 2014

Mar. 31, 2013

Jun. 16, 2009

Mar. 31, 2014

Mar. 31, 2014

Apr. 06, 2013

Mar. 31, 2014

Mar. 31, 2013

Mar. 31, 2014

Mar. 31, 2013

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Apr. 06, 2013

Mar. 24, 2014

Parkvale Financial Corporation [Member]

Annapolis Bancorp, Inc. [Member]

Annapolis Bancorp, Inc. [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Employee Stock Option [Member]

Employee Stock Option [Member]

Service-Based Awards [Member]

Performance-Based Awards [Member]

Discretionary Service-Based Awards [Member]

Warrant Expires In 2019 [Member]

Warrant Expires In 2019 [Member]

Warrant Expires in 2018 [Member]

Annapolis Bancorp, Inc. [Member]

Parkvale Financial Corporation [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restricted stock awards issued

'

295,705

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Aggregate, weighted average grant date fair value

'

$3,472

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Common stock shares available under Incentive Compensation Plans

2,467,326

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Vesting period of awards expensed, years

'

'

'

'

'

'

'

'

'10 years

'

'3 years

'4 years

'5 years

'

'

'

Share-based compensation expense related to restricted stock awards

'

'

'

'

'

'

$532

$1,083

'

'

'

'

'

'

'

'

Tax benefit related to restricted stock awards

'

'

'

'

'

'

186

379

'

'

'

'

'

'

'

'

Total fair value of awards vested

'

'

'

'

'

'

8,631

8,259

'

'

'

'

'

'

'

'

Unrecognized compensation cost related to unvested restricted stock awards

4,159

'

'

'

'

'

4,159

'

'

'

1,390

2,769

'

'

'

'

Amount subject to accelerated vesting under Incentive Compensation Plan

'

'

'

'

'

'

56

'

'

'

'

'

'

'

'

'

Stock options exercised

87,332

'

'

'

'

'

'

'

87,332

'

'

'

'

'

'

'

Stock options granted

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Intrinsic value of outstanding and exercisable stock options

$3,012

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum common shares available for purchase under warrants

1,302,083

'

651,042

'

'

'

'

'

'

'

'

'

'

'

'

'

Warrant issued, exercise price

'

'

'

'

'

3.57

'

'

'

'

'

'

'

11.52

3.57

5.81

Warrant issued

'

'

'

819,640

342,564

'

'

'

'

'

'

'

'

'

'

'

Stock_Incentive_Plans_Summary_

Stock Incentive Plans - Summary of Information Concerning Restricted Stock Awards (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'	'
Awards, Unvested awards outstanding at beginning of period	1,729,033	1,913,073
Awards, Granted	'	295,705
Awards, Net adjustment due to performance	-19,002	'
Awards, Vested	-667,956	-734,130
Awards, Forfeited	-430	-622
Awards, Dividend reinvestment	9,612	12,008
Awards, Unvested awards outstanding at end of period	1,051,257	1,486,034
Weighted Average Grant Price per Share, Unvested awards outstanding at beginning of period	$10.23	$9.17
Weighted Average Grant Price per Share, Granted	'	$11.74
Weighted Average Grant Price per Share, Net adjustment due to performance	$8.48	'
Weighted Average Grant Price per Share, Vested	$9.01	$7.90
Weighted Average Grant Price per Share, Forfeited	$10.69	$9.23
Weighted Average Grant Price per Share, Dividend reinvestment	$13.01	$11.78
Weighted Average Grant Price per Share, Unvested awards outstanding at end of period	$11.06	$10.34

Stock_Incentive_Plans_Componen

Stock Incentive Plans - Components of Restricted Stock Awards (Detail) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Unvested awards	1,051,257	1,729,033	1,486,034	1,913,073
Unrecognized compensation expense	$4,159	'	'	'
Intrinsic value	14,090	'	'	'
Weighted average remaining life (in years)	'1 year 11 months 27 days	'	'	'
Service-Based Awards [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Unvested awards	262,189	'	'	'
Unrecognized compensation expense	1,390	'	'	'
Intrinsic value	3,516	'	'	'
Weighted average remaining life (in years)	'1 year 10 months 28 days	'	'	'
Performance-Based Awards [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Unvested awards	789,068	'	'	'
Unrecognized compensation expense	2,769	'	'	'
Intrinsic value	$10,574	'	'	'
Weighted average remaining life (in years)	'2 years 7 days	'	'	'

Stock_Incentive_Plans_Summary_1

Stock Incentive Plans - Summary of Information Concerning Stock Option Awards (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'	'
Weighted Average Price per Share, Options outstanding at beginning of year	$11.50	$13.21
Weighted Average Price per Share, Assumed from acquisition	$5.77	'
Weighted Average Price per Share, Exercised	$6.05	'
Weighted Average Price per Share, Forfeited	$25.79	$14.92
Weighted Average Price per Share, Options outstanding and exercisable at end of year	$8.71	$12.01
Shares, Options outstanding at beginning of year	533,524	640,050
Shares, Assumed from acquisition	304,785	'
Shares, Exercised	-87,332	'
Shares, Forfeited	-48,172	-263,589
Shares, Options outstanding and exercisable at end of year	702,805	376,461

Retirement_Plans_Additional_In

Retirement Plans - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2008
	RetirementPlans
Disclosure Retirement Plans [Abstract]	'	'	'
Number of supplemental non-qualified retirement plans sponsored by the Corporation	2	'	'
Consecutive calendar years used to calculate BRP benefits	'	'	'5 years
Term of employment for consideration of BRP	'	'	'10 years
Annuity equivalent of contribution to defined contribution plan deducted from monthly benefit of basic retirement plan	3.00%	'	'
Percent of employer match	100.00%	'	'
Employee contribution percentage	4.00%	'	'
Additional automatic contribution increase, percentage	3.00%	'	'
Additional discretionary contribution, performance goals, percentage	2.00%	'	'
Contribution expense of the Corporation	$2,570	$2,335	'

Retirement_Plans_Net_Periodic_

Retirement Plans - Net Periodic Benefit Cost for Defined Benefit Plans (Detail) (Defined Benefit Plans [Member], USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Defined Benefit Plans [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Service cost	$16	$18
Interest cost	1,596	1,427
Expected return on plan assets	-2,487	-2,270
Amortization	'	'
Unrecognized net transition asset	-5	-23
Unrecognized prior service cost (credit)	2	2
Unrecognized loss	337	557
Net periodic pension cost	($541)	($289)

Comprehensive_Income_Component

Comprehensive Income - Components of Comprehensive Income, Net of Related Tax (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Components Of Comprehensive Income [Abstract]	'	'
Net income	$34,524	$28,538
Securities available for sale, Unrealized gains (losses) arising during the period, net of tax expense (benefit) of $5,681 and $(99)	10,550	-184
Securities available for sale, Reversal of non-credit related losses on debt securities not expected to be sold, net of tax expense of $3,335	6,192	'
Securities available for sale, Reclassification adjustment for gains included in net income, net of tax expense of $3,311 and $239	-6,150	-445
Unrealized gains (losses) on derivative instruments arising during the period, net of tax expense (benefit) of $1,117 and $(373)	2,074	-694
Unrealized gains on pension and postretirement benefit obligations arising during the period, net of tax expense of $117 and $188	217	349
Other comprehensive income (loss)	12,883	-974
Comprehensive income	$47,407	$27,564

Comprehensive_Income_Component1

Comprehensive Income - Components of Comprehensive Income, Net of Related Tax (Parenthetical) (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Components Of Comprehensive Income [Abstract]	'	'
Securities available for sale, Unrealized gains (losses) arising during the period, tax expense (benefit)	$5,681	($99)
Securities available for sale, Reversal of non-credit related losses on debt securities not expected to be sold, tax expense	3,335	'
Securities available for sale, Reclassification adjustment for gains included in net income, tax expense	3,311	239
Unrealized gains (losses) on derivative instruments arising during the period, tax expense (benefit)	1,117	-373
Unrealized gains on pension and postretirement benefit obligations arising during the period, tax expense	$117	$188

Comprehensive_Income_Changes_i

Comprehensive Income - Changes in Accumulated Other Comprehensive Income, Net of Tax, by Component (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'
Accumulated other comprehensive income (loss), balance at beginning of period	($56,924)	'
Other comprehensive income (loss) before reclassifications	19,033	'
Amounts reclassified from accumulated other comprehensive income	-6,150	'
Net current period other comprehensive income (loss)	12,883	-974
Accumulated other comprehensive income (loss), balance at end of period	-44,041	'
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	-11,874	'
Other comprehensive income (loss) before reclassifications	10,550	'
Amounts reclassified from accumulated other comprehensive income	-6,150	'
Net current period other comprehensive income (loss)	4,400	'
Accumulated other comprehensive income (loss), balance at end of period	-7,474	'
Non-Credit Related Loss on Debt Securities not Expected to be Sold [Member]	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'
Accumulated other comprehensive income (loss), balance at beginning of period	-6,192	'
Other comprehensive income (loss) before reclassifications	6,192	'
Amounts reclassified from accumulated other comprehensive income	'	'
Net current period other comprehensive income (loss)	6,192	'
Accumulated other comprehensive income (loss), balance at end of period	'	'
Unrealized Losses on Derivative Instruments [Member]	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'
Accumulated other comprehensive income (loss), balance at beginning of period	-6,586	'
Other comprehensive income (loss) before reclassifications	2,074	'
Amounts reclassified from accumulated other comprehensive income	'	'
Net current period other comprehensive income (loss)	2,074	'
Accumulated other comprehensive income (loss), balance at end of period	-4,512	'
Unrecognized Pension and Postretirement Obligations [Member]	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'
Accumulated other comprehensive income (loss), balance at beginning of period	-32,272	'
Other comprehensive income (loss) before reclassifications	217	'
Amounts reclassified from accumulated other comprehensive income	'	'
Net current period other comprehensive income (loss)	217	'
Accumulated other comprehensive income (loss), balance at end of period	($32,055)	'

Comprehensive_Income_Summary_o

Comprehensive Income - Summary of Reclassifications Out of Accumulated Other Comprehensive Income (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'
Net securities gains	$9,461	$684
Tax (expense) benefit	14,199	11,827
Net Income	34,524	28,538
Amount Reclassified from Other Comprehensive Income [Member] | Unrealized Net Gains (Losses) on Securities Available for Sale [Member]	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'
Net securities gains	-9,461	'
Tax (expense) benefit	-3,311	'
Net Income	($6,150)	'

Earnings_Per_Common_Share_Comp

Earnings Per Common Share - Computation of Basic and Diluted Earnings Per Common Share (Detail) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Earnings Per Share [Abstract]	'	'
Net income	$34,524	$28,538
Preferred stock dividends	2,322	'
Net income available to common stockholders	$32,202	$28,538
Basic weighted average common shares outstanding	162,186,395	139,650,495
Net effect of dilutive stock options, warrants, restricted stock and convertible debt	1,780,851	1,415,695
Diluted weighted average common shares outstanding	163,967,246	141,066,190
Basic	$0.20	$0.20
Diluted	$0.20	$0.20

Earnings_Per_Common_Share_Addi

Earnings Per Common Share - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Earnings Per Share [Abstract]	'	'
Common stock excluded from computation of diluted earnings per common share	51,641	71,555

Cash_Flow_Information_Summary_

Cash Flow Information - Summary of Cash Flow Information (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Statement Of Cash Flows [Abstract]	'	'
Interest paid on deposits and other borrowings	$10,576	$13,489
Income taxes paid	'	'
Transfers of loans to other real estate owned	4,849	3,271
Financing of other real estate owned sold	'	$113

Business_Segments_Additional_I

Business Segments - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2014
	Segment
Segment Reporting [Abstract]	'
Number of reportable segments	4

Business_Segments_Financial_In

Business Segments - Financial Information for Segments of Corporation (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Segment Reporting Information [Line Items]	'	'	'
Interest income	$117,880	$105,118	'
Interest expense	10,055	12,022	'
Net interest income	107,825	93,096	'
Provision for loan losses	7,006	7,541	'
Non-interest income	42,070	33,612	'
Non-interest expense	91,883	76,877	'
Intangible amortization	2,283	1,925	'
Income tax expense (benefit)	14,199	11,827	'
Net income (loss)	34,524	28,538	'
Total assets	14,476,510	11,997,990	13,563,405
Total intangibles	856,812	711,420	'
Operating Segments [Member] | Community Banking [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Interest income	106,691	94,051	'
Interest expense	8,248	8,918	'
Net interest income	98,443	85,133	'
Provision for loan losses	5,296	5,820	'
Non-interest income	31,913	23,698	'
Non-interest expense	76,866	62,968	'
Intangible amortization	2,110	1,748	'
Income tax expense (benefit)	13,343	11,172	'
Net income (loss)	32,741	27,123	'
Total assets	14,299,543	11,816,414	'
Total intangibles	833,642	687,545	'
Operating Segments [Member] | Wealth Management [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Interest income	'	'	'
Interest expense	'	'	'
Net interest income	'	'	'
Provision for loan losses	'	'	'
Non-interest income	7,323	7,115	'
Non-interest expense	6,292	6,086	'
Intangible amortization	72	76	'
Income tax expense (benefit)	351	350	'
Net income (loss)	608	603	'
Total assets	19,542	18,520	'
Total intangibles	10,936	11,236	'
Operating Segments [Member] | Insurance [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Interest income	25	28	'
Interest expense	'	'	'
Net interest income	25	28	'
Provision for loan losses	'	'	'
Non-interest income	4,210	3,559	'
Non-interest expense	3,046	2,811	'
Intangible amortization	101	101	'
Income tax expense (benefit)	385	239	'
Net income (loss)	703	436	'
Total assets	19,954	19,141	'
Total intangibles	10,425	10,830	'
Operating Segments [Member] | Consumer Finance [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Interest income	9,365	9,016	'
Interest expense	846	856	'
Net interest income	8,519	8,160	'
Provision for loan losses	1,457	1,527	'
Non-interest income	660	629	'
Non-interest expense	4,937	4,516	'
Intangible amortization	'	'	'
Income tax expense (benefit)	1,073	1,048	'
Net income (loss)	1,712	1,698	'
Total assets	182,018	175,710	'
Total intangibles	1,809	1,809	'
Parent and Other [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Interest income	1,799	2,023	'
Interest expense	961	2,248	'
Net interest income	838	-225	'
Provision for loan losses	253	194	'
Non-interest income	-2,036	-1,389	'
Non-interest expense	742	496	'
Intangible amortization	'	'	'
Income tax expense (benefit)	-953	-982	'
Net income (loss)	-1,240	-1,322	'
Total assets	-44,547	-31,795	'
Total intangibles	'	'	'

Fair_Value_Measurements_Additi

Fair Value Measurements - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
	Securities	Securities	Assets Still Held [Member]	Assets Still Held [Member]
Fair Value Measurements Disclosure [Line Items]	'	'	'	'
Percentage of securities using market-based information	99.80%	'	'	'
Percentage of securities using model-based techniques	0.20%	'	'	'
Minimum corporation reserves for commercial loan	$500	'	'	'
Number of single-issuer trust preferred securities transferred between hierarchy levels	0	4	'	'
Change in unrealized gains or losses included in earnings relating to assets still held	13,766	78	0	0
Impaired loans, carrying amount	9,525	'	'	'
Allocated allowance for loan losses	1,268	'	'	'
Fair value of allocated allowance	9,422	'	'	'
Estimated costs to sell	1,165	'	'	'
Provision for fair value measurements included in allowance for loan losses	622	'	'	'
Carrying amount of OREO	4,946	'	'	'
Written down of OREO	4,099	'	'	'
Fair value of OREO	4,659	19,442	'	'
Estimated cost to sell OREO	560	'	'	'
Loss from OREO included in earnings	$847	'	'	'
Short-term borrowings approximate fair value for amounts that mature, days, less than	'90 days	'	'	'

Fair_Value_Measurements_Balanc

Fair Value Measurements - Balances of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	$1,271,927	$1,139,524
Assets measured at fair value, Available for sale equity securities	2,143	2,126
Assets measured at fair value, Available for sale securities	1,274,070	1,141,650
Derivative financial instruments	33,292	33,317
Assets measured at fair value, Total	1,307,362	1,174,967
Derivative financial instruments	40,165	43,369
Liabilities measured at fair value, Total	40,165	43,369
U.S. Government-Sponsored Entities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	264,681	330,985
States of the U.S. and Political Subdivisions [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	14,505	17,002
Other Debt Securities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	16,240	16,100
Agency Mortgage-Backed Securities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	355,941	250,881
Agency Collateralized Mortgage Obligations [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	609,752	491,199
Non-Agency Collateralized Mortgage Obligations [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	1,679	1,762
Commercial Mortgage-Backed Securities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	9,129	'
Financial Services Industry [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale equity securities	2,078	2,061
Insurance Services Industry [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale equity securities	65	65
Collateralized Debt Obligations [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	'	31,595
Trading Assets [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Derivative financial instruments	33,173	33,317
Not for Trading Assets [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Derivative financial instruments	119	'
Trading Liabilities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Derivative financial instruments	33,105	33,236
Not for Trading Liabilities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Derivative financial instruments	7,060	10,133
Level 1 [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	'	'
Assets measured at fair value, Available for sale equity securities	623	649
Assets measured at fair value, Available for sale securities	623	649
Derivative financial instruments	'	'
Assets measured at fair value, Total	623	649
Derivative financial instruments	'	'
Liabilities measured at fair value, Total	'	'
Level 1 [Member] | U.S. Government-Sponsored Entities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	'	'
Level 1 [Member] | States of the U.S. and Political Subdivisions [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	'	'
Level 1 [Member] | Other Debt Securities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	'	'
Level 1 [Member] | Agency Mortgage-Backed Securities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	'	'
Level 1 [Member] | Agency Collateralized Mortgage Obligations [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	'	'
Level 1 [Member] | Non-Agency Collateralized Mortgage Obligations [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	'	'
Level 1 [Member] | Commercial Mortgage-Backed Securities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	'	'
Level 1 [Member] | Financial Services Industry [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale equity securities	558	584
Level 1 [Member] | Insurance Services Industry [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale equity securities	65	65
Level 1 [Member] | Collateralized Debt Obligations [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	'	'
Level 1 [Member] | Trading Assets [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Derivative financial instruments	'	'
Level 1 [Member] | Not for Trading Assets [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Derivative financial instruments	'	'
Level 1 [Member] | Trading Liabilities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Derivative financial instruments	'	'
Level 1 [Member] | Not for Trading Liabilities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Derivative financial instruments	'	'
Level 2 [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	1,270,264	1,106,185
Assets measured at fair value, Available for sale equity securities	1,106	1,067
Assets measured at fair value, Available for sale securities	1,271,370	1,107,252
Derivative financial instruments	33,292	33,317
Assets measured at fair value, Total	1,304,662	1,140,569
Derivative financial instruments	40,165	43,369
Liabilities measured at fair value, Total	40,165	43,369
Level 2 [Member] | U.S. Government-Sponsored Entities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	264,681	330,985
Level 2 [Member] | States of the U.S. and Political Subdivisions [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	14,505	17,002
Level 2 [Member] | Other Debt Securities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	16,240	16,100
Level 2 [Member] | Agency Mortgage-Backed Securities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	355,941	250,881
Level 2 [Member] | Agency Collateralized Mortgage Obligations [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	609,752	491,199
Level 2 [Member] | Non-Agency Collateralized Mortgage Obligations [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	16	18
Level 2 [Member] | Commercial Mortgage-Backed Securities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	9,129	'
Level 2 [Member] | Financial Services Industry [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale equity securities	1,106	1,067
Level 2 [Member] | Insurance Services Industry [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale equity securities	'	'
Level 2 [Member] | Collateralized Debt Obligations [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	'	'
Level 2 [Member] | Trading Assets [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Derivative financial instruments	33,173	33,317
Level 2 [Member] | Not for Trading Assets [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Derivative financial instruments	119	'
Level 2 [Member] | Trading Liabilities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Derivative financial instruments	33,105	33,236
Level 2 [Member] | Not for Trading Liabilities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Derivative financial instruments	7,060	10,133
Level 3 [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	1,663	33,339
Assets measured at fair value, Available for sale equity securities	414	410
Assets measured at fair value, Available for sale securities	2,077	33,749
Derivative financial instruments	'	'
Assets measured at fair value, Total	2,077	33,749
Derivative financial instruments	'	'
Liabilities measured at fair value, Total	'	'
Level 3 [Member] | U.S. Government-Sponsored Entities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	'	'
Level 3 [Member] | States of the U.S. and Political Subdivisions [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	'	'
Level 3 [Member] | Other Debt Securities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	'	'
Level 3 [Member] | Agency Mortgage-Backed Securities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	'	'
Level 3 [Member] | Agency Collateralized Mortgage Obligations [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	'	'
Level 3 [Member] | Non-Agency Collateralized Mortgage Obligations [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	1,663	1,744
Level 3 [Member] | Commercial Mortgage-Backed Securities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	'	'
Level 3 [Member] | Financial Services Industry [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale equity securities	414	410
Level 3 [Member] | Insurance Services Industry [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale equity securities	'	'
Level 3 [Member] | Collateralized Debt Obligations [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	'	31,595
Level 3 [Member] | Trading Assets [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Derivative financial instruments	'	'
Level 3 [Member] | Not for Trading Assets [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Derivative financial instruments	'	'
Level 3 [Member] | Trading Liabilities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Derivative financial instruments	'	'
Level 3 [Member] | Not for Trading Liabilities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Derivative financial instruments	'	'

Fair_Value_Measurements_Additi1

Fair Value Measurements - Additional Information about Assets Measured at Fair Value on Recurring Basis (Detail) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Balance at beginning of period	$33,749	$32,565
Total gains (losses) - realized/unrealized, Included in earnings	13,766	78
Total gains (losses) - realized/unrealized, Included in other comprehensive income	5,616	6,705
Accretion included in earnings	658	3,176
Purchases	'	'
Issuances	'	38
Sales/redemptions	-51,527	-1,033
Settlements	-185	-1,698
Transfers from Level 3	'	-6,082
Transfers into Level 3	'	'
Balance at end of period	2,077	33,749
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	22,456
Total gains (losses) - realized/unrealized, Included in earnings	13,766	'
Total gains (losses) - realized/unrealized, Included in other comprehensive income	5,608	6,701
Accretion included in earnings	657	3,160
Purchases	'	'
Issuances	'	38
Sales/redemptions	-51,527	'
Settlements	-99	-760
Transfers from Level 3	'	'
Transfers into Level 3	'	'
Balance at end of period	'	31,595
Other Debt Securities [Member]	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Balance at beginning of period	'	6,892
Total gains (losses) - realized/unrealized, Included in earnings	'	78
Total gains (losses) - realized/unrealized, Included in other comprehensive income	'	21
Accretion included in earnings	'	4
Purchases	'	'
Issuances	'	'
Sales/redemptions	'	-1,033
Settlements	'	'
Transfers from Level 3	'	-5,962
Transfers into Level 3	'	'
Balance at end of period	'	'
Equity Securities [Member]	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Balance at beginning of period	410	512
Total gains (losses) - realized/unrealized, Included in earnings	'	'
Total gains (losses) - realized/unrealized, Included in other comprehensive income	4	18
Accretion included in earnings	'	'
Purchases	'	'
Issuances	'	'
Sales/redemptions	'	'
Settlements	'	'
Transfers from Level 3	'	-120
Transfers into Level 3	'	'
Balance at end of period	414	410
Residential Non-Agency Collateralized Mortgage Obligations [Member]	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Balance at beginning of period	1,744	2,705
Total gains (losses) - realized/unrealized, Included in earnings	'	'
Total gains (losses) - realized/unrealized, Included in other comprehensive income	4	-35
Accretion included in earnings	1	12
Purchases	'	'
Issuances	'	'
Sales/redemptions	'	'
Settlements	-86	-938
Transfers from Level 3	'	'
Transfers into Level 3	'	'
Balance at end of period	$1,663	$1,744

Fair_Value_Measurements_Additi2

Fair Value Measurements - Additional Information about Assets Measured at Fair Value on Non-Recurring Basis (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]	'	'
Impaired loans	$9,422	$3,294
Other real estate owned	4,659	19,442
Level 1 [Member]	'	'
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]	'	'
Impaired loans	'	'
Other real estate owned	'	'
Level 2 [Member]	'	'
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]	'	'
Impaired loans	9,422	3,235
Other real estate owned	1,373	4,485
Level 3 [Member]	'	'
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]	'	'
Impaired loans	'	59
Other real estate owned	$3,286	$14,957

Fair_Value_Measurements_Fair_V

Fair Value Measurements - Fair Values of Corporation's Financial Instruments (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'
Cash and cash equivalents, carrying amount	$246,253	$213,981	$161,596	$239,044
Securities available for sale, carrying amount	1,274,070	1,141,650	'	'
Securities held to maturity, carrying amount	1,420,446	1,199,169	'	'
Net loans, including loans held for sale, carrying amount	9,834,857	9,402,448	'	'
Bank owned life insurance, carrying amount	307,872	289,402	'	'
Derivative assets, carrying amount	33,292	33,317	'	'
Accrued interest receivable, carrying amount	37,199	35,520	'	'
Deposits, carrying amount	10,938,736	10,198,232	'	'
Short-term borrowings, carrying amount	1,216,624	1,241,239	'	'
Long-term debt, carrying amount	235,752	143,928	'	'
Junior subordinated debt, carrying amount	68,517	75,205	'	'
Derivative liabilities, carrying amount	40,165	43,369	'	'
Accrued interest payable, carrying amount	6,539	7,061	'	'
Cash and cash equivalents, fair value	246,253	213,981	'	'
Securities available for sale, fair value	1,274,070	1,141,650	'	'
Securities held to maturity, fair value	1,418,994	1,189,563	'	'
Net loans, including loans held for sale, fair value	9,668,159	9,243,780	'	'
Bank owned life insurance, fair value	312,290	292,694	'	'
Derivative assets, fair value	33,292	33,317	'	'
Accrued interest receivable, fair value	37,199	35,520	'	'
Deposits, fair value	10,948,821	10,208,268	'	'
Short-term borrowings, fair value	1,216,624	1,241,239	'	'
Long-term debt, fair value	238,381	145,995	'	'
Junior subordinated debt, fair value	69,465	70,442	'	'
Derivative liabilities, fair value	40,165	43,369	'	'
Accrued interest payable, fair value	6,539	7,061	'	'
Level 1 [Member]	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'
Cash and cash equivalents, fair value	246,253	213,981	'	'
Securities available for sale, fair value	623	649	'	'
Securities held to maturity, fair value	'	'	'	'
Net loans, including loans held for sale, fair value	'	'	'	'
Bank owned life insurance, fair value	312,290	292,694	'	'
Derivative assets, fair value	'	'	'	'
Accrued interest receivable, fair value	37,199	35,520	'	'
Deposits, fair value	8,161,249	7,592,159	'	'
Short-term borrowings, fair value	1,216,624	1,241,239	'	'
Long-term debt, fair value	'	'	'	'
Junior subordinated debt, fair value	'	'	'	'
Derivative liabilities, fair value	'	'	'	'
Accrued interest payable, fair value	6,539	7,061	'	'
Level 2 [Member]	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'
Cash and cash equivalents, fair value	'	'	'	'
Securities available for sale, fair value	1,271,370	1,107,252	'	'
Securities held to maturity, fair value	1,412,618	1,182,671	'	'
Net loans, including loans held for sale, fair value	'	'	'	'
Bank owned life insurance, fair value	'	'	'	'
Derivative assets, fair value	33,292	33,317	'	'
Accrued interest receivable, fair value	'	'	'	'
Deposits, fair value	2,787,572	2,616,109	'	'
Short-term borrowings, fair value	'	'	'	'
Long-term debt, fair value	'	'	'	'
Junior subordinated debt, fair value	'	'	'	'
Derivative liabilities, fair value	40,165	43,369	'	'
Accrued interest payable, fair value	'	'	'	'
Level 3 [Member]	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'
Cash and cash equivalents, fair value	'	'	'	'
Securities available for sale, fair value	2,077	33,749	'	'
Securities held to maturity, fair value	6,376	6,892	'	'
Net loans, including loans held for sale, fair value	9,668,159	9,243,780	'	'
Bank owned life insurance, fair value	'	'	'	'
Derivative assets, fair value	'	'	'	'
Accrued interest receivable, fair value	'	'	'	'
Deposits, fair value	'	'	'	'
Short-term borrowings, fair value	'	'	'	'
Long-term debt, fair value	238,381	145,995	'	'
Junior subordinated debt, fair value	69,465	70,442	'	'
Derivative liabilities, fair value	'	'	'	'
Accrued interest payable, fair value	'	'	'	'