F.N.B. (FNB) 10-Q8 Nov 132013 Q3 Quarterly reportFinancial data

Company Profile

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
Document and Entity Information	Sep. 30, 2013	Nov. 01, 2013
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Sep-13	'
Document Fiscal Year Focus	'2013	'
Document Fiscal Period Focus	'Q3	'
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	'	158,867,441

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Assets	'	'
Cash and due from banks	$234,746	$216,233
Interest bearing deposits with banks	48,763	22,811
Cash and Cash Equivalents	283,509	239,044
Securities available for sale	1,115,558	1,172,683
Securities held to maturity (fair value of $1,181,652 and $1,143,213)	1,180,992	1,106,563
Residential mortgage loans held for sale	8,105	27,751
Loans, net of unearned income of $52,598 and $51,661	8,836,905	8,137,719
Allowance for loan losses	-110,052	-104,374
Net Loans	8,726,853	8,033,345
Premises and equipment, net	147,406	140,367
Goodwill	713,509	675,555
Core deposit and other intangible assets, net	35,400	37,851
Bank owned life insurance	263,781	246,088
Other assets	315,166	344,729
Total Assets	12,790,279	12,023,976
Liabilities	'	'
Non-interest bearing demand	2,115,813	1,738,195
Savings and NOW	5,247,922	4,808,121
Certificates and other time deposits	2,359,636	2,535,858
Total Deposits	9,723,371	9,082,174
Other liabilities	133,061	163,151
Short-term borrowings	1,166,180	1,083,138
Long-term debt	91,807	89,425
Junior subordinated debt	194,213	204,019
Total Liabilities	11,308,632	10,621,907
Stockholders' Equity	'	'
Common stock - $0.01 par value Authorized - 500,000,000 shares Issued - 145,913,917 and 140,314,846 shares	1,455	1,398
Additional paid-in capital	1,440,779	1,376,601
Retained earnings	112,649	75,312
Accumulated other comprehensive loss	-66,171	-46,224
Treasury stock - 650,482 and 385,604 shares at cost	-7,065	-5,018
Total Stockholders' Equity	1,481,647	1,402,069
Total Liabilities and Stockholders' Equity	$12,790,279	$12,023,976

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]	'	'
Securities held to maturity, fair value	$1,181,652	$1,143,213
Unearned income on loans	$52,598	$51,661
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	145,913,917	140,314,846
Treasury stock, shares	650,482	385,604

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Interest Income	'	'	'	'
Loans, including fees	$97,499	$94,545	$286,156	$282,720
Securities:	'	'	'	'
Taxable	10,888	11,470	32,141	36,022
Nontaxable	1,377	1,682	4,336	5,083
Dividends	13	12	71	361
Other	13	47	45	142
Total Interest Income	109,790	107,756	322,749	324,328
Interest Expense	'	'	'	'
Deposits	6,895	10,205	22,503	32,776
Short-term borrowings	1,122	1,182	3,304	3,961
Long-term debt	719	860	2,268	2,702
Junior subordinated debt	1,800	1,978	5,578	5,956
Total Interest Expense	10,536	14,225	33,653	45,395
Net Interest Income	99,254	93,531	289,096	278,933
Provision for loan losses	7,280	8,429	22,724	22,028
Net Interest Income After Provision for Loan Losses	91,974	85,102	266,372	256,905
Non-Interest Income	'	'	'	'
Impairment losses on securities	'	-440	'	-440
Non-credit related losses on securities not expected to be sold (recognized in other comprehensive income)	'	321	'	321
Net impairment losses on securities	'	-119	'	-119
Service charges	16,512	17,666	51,703	52,419
Insurance commissions and fees	4,088	4,578	12,619	12,632
Securities commissions and fees	2,575	2,102	8,365	6,143
Trust fees	4,176	3,783	12,428	11,359
Net securities gains (losses)	5	-66	757	302
Gain on sale of residential mortgage loans	899	1,176	2,942	2,696
Bank owned life insurance	1,635	1,671	5,161	4,809
Other	2,968	4,022	9,307	9,095
Total Non-Interest Income	32,858	34,813	103,282	99,336
Non-Interest Expense	'	'	'	'
Salaries and employee benefits	45,155	41,579	132,261	127,255
Net occupancy	6,132	5,840	19,669	18,624
Equipment	6,415	5,728	18,013	16,598
Amortization of intangibles	2,115	2,242	6,226	6,892
Outside services	7,565	7,048	23,332	20,725
FDIC insurance	3,161	2,014	8,197	6,172
Merger related	913	88	4,211	7,399
Other	11,765	12,543	34,356	38,572
Total Non-Interest Expense	83,221	77,082	246,265	242,237
Income Before Income Taxes	41,611	42,833	123,389	114,004
Income taxes	9,977	12,090	34,024	32,549
Net Income	31,634	30,743	89,365	81,455
Net Income per Share - Basic	$0.22	$0.22	$0.63	$0.59
Net Income per Share - Diluted	$0.22	$0.22	$0.62	$0.58
Cash Dividends per Share	$0.12	$0.12	$0.36	$0.36
Comprehensive Income	$27,540	$33,132	$69,418	$87,631

Consolidated_Statements_of_Sto

Consolidated Statements of Stockholders' Equity (USD $)	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]
In Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]
Balance at Dec. 31, 2011	$1,210,199	$1,268	$1,224,572	$32,925	($45,148)	($3,418)
Net income	81,455	'	'	81,455	'	'
Change in other comprehensive income, net of tax	6,176	'	'	'	6,176	'
Common stock dividends ($0.36/share)	-50,705	'	'	-50,705	'	'
Issuance of common stock	144,037	129	145,833	-377	'	-1,548
Restricted stock compensation	3,451	'	3,451	'	'	'
Tax expense of stock-based compensation	385	'	385	'	'	'
Balance at Sep. 30, 2012	1,394,998	1,397	1,374,241	63,298	-38,972	-4,966
Balance at Dec. 31, 2012	1,402,069	1,398	1,376,601	75,312	-46,224	-5,018
Net income	89,365	'	'	89,365	'	'
Change in other comprehensive income, net of tax	-19,947	'	'	'	-19,947	'
Common stock dividends ($0.36/share)	-52,028	'	'	-52,028	'	'
Issuance of common stock	57,571	57	59,561	'	'	-2,047
Restricted stock compensation	3,339	'	3,339	'	'	'
Tax expense of stock-based compensation	1,278	'	1,278	'	'	'
Balance at Sep. 30, 2013	$1,481,647	$1,455	$1,440,779	$112,649	($66,171)	($7,065)

Consolidated_Statements_of_Sto1

Consolidated Statements of Stockholders' Equity (Parenthetical) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement Of Stockholders Equity [Abstract]	'	'	'	'
Common stock dividends per share	$0.12	$0.12	$0.36	$0.36

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Operating Activities	'	'
Net income	$89,365	$81,455
Adjustments to reconcile net income to net cash flows provided by operating activities:	'	'
Depreciation, amortization and accretion	21,845	21,989
Provision for loan losses	22,724	22,028
Deferred tax expenses	12,246	29,549
Net securities gains	-757	-302
Other-than-temporary impairment losses on securities	'	119
Tax benefit of stock-based compensation	-1,278	-385
Net change in:	'	'
Interest receivable	-1,568	-3,248
Interest payable	-2,836	-3,506
Trading securities	88,052	331,972
Residential mortgage loans held for sale	19,647	-7,300
Bank owned life insurance	-1,808	-4,475
Other, net	18,610	12,036
Net cash flows provided by operating activities	264,242	479,932
Investing Activities	'	'
Net change in loans	-473,933	-238,978
Securities available for sale:	'	'
Purchases	-250,724	-780,185
Sales	21,919	87,101
Maturities	269,330	367,025
Securities held to maturity:	'	'
Purchases	-335,533	-468,780
Sales	17,429	2,903
Maturities	239,942	240,059
Purchase of bank owned life insurance	-10,016	-20,024
Withdrawal/surrender of bank owned life insurance	'	20,701
Increase in premises and equipment	-7,745	-7,940
Net cash received in business combinations	41,986	203,538
Net cash flows used in investing activities	-487,345	-594,580
Financing Activities	'	'
Non-interest bearing deposits, savings and NOW accounts	536,442	567,788
Time deposits	-240,111	-249,764
Short-term borrowings	68,643	155,177
Increase in long-term debt	37,602	26,961
Decrease in long-term debt	-73,867	-183,139
Decrease in junior subordinated debt	-15,000	'
Net proceeds from issuance of common stock	4,609	6,586
Tax benefit of stock-based compensation	1,278	385
Cash dividends paid	-52,028	-50,705
Net cash flows provided by financing activities	267,568	273,289
Net Increase in Cash and Cash Equivalents	44,465	158,641
Cash and cash equivalents at beginning of period	239,044	208,953
Cash and Cash Equivalents at End of Period	$283,509	$367,594

BUSINESS

BUSINESS	9 Months Ended
BUSINESS	Sep. 30, 2013
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. The Corporation has more than 250 banking offices throughout Pennsylvania, Ohio, West Virginia and Maryland. 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, 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. Wealth management services include asset management, private banking and insurance. The Corporation also operates Regency Finance Company (Regency), which has more than 70 consumer finance offices in Pennsylvania, Ohio, Kentucky and Tennessee.

BASIS_OF_PRESENTATION

BASIS OF PRESENTATION	9 Months Ended
BASIS OF PRESENTATION	Sep. 30, 2013
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, 2013.

USE_OF_ESTIMATES

USE OF ESTIMATES	9 Months Ended
USE OF ESTIMATES	Sep. 30, 2013
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	9 Months Ended
SECURITIES OFFERINGS	Sep. 30, 2013
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. The net proceeds of the combined offerings after deducting underwriting discounts and commissions and estimated offering expenses were $151,175. The Corporation intends to use the proceeds from the offerings to proactively position itself for Basel III implementation, as discussed in the “Enhanced Regulatory Capital Standards” section of this Report, and to support future growth opportunities.

MERGERS_AND_ACQUISITIONS

MERGERS AND ACQUISITIONS	9 Months Ended
MERGERS AND ACQUISITIONS	Sep. 30, 2013
Business Combinations [Abstract]	'
MERGERS AND ACQUISITIONS	'
	MERGERS AND ACQUISITIONS
	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 $714,126 in assets, $500,000 in loans and $620,000 in deposits. The acquisition was valued at $110,280 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 assets and liabilities of PVF were recorded on the Corporation’s balance sheet 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 income and comprehensive income since that date. The operations of PVF are not included in the accompanying financial statements dated September 30, 2013. PVF’s banking affiliate, Park View Federal Savings Bank, was merged into FNBPA on October 12, 2013. Based on a preliminary purchase price allocation, during October 2013 the Corporation recorded $50,898 in goodwill and $4,400 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.
	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 $429,358 in assets, $254,911 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. 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 balance sheet 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 income and 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 a preliminary purchase price allocation, the Corporation has recorded $37,954 in goodwill and $3,775 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.
	On January 1, 2012, the Corporation completed its acquisition of Parkvale Financial Corporation (Parkvale), a unitary savings and loan holding company based in Monroeville, Pennsylvania. On the acquisition date, the fair values of Parkvale included $1,743,885 in assets, $919,480 in loans and $1,525,253 in deposits. The acquisition was valued at $140,900 and resulted in the Corporation issuing 12,159,312 shares of its common stock in exchange for 5,582,846 shares of Parkvale common stock. The assets and liabilities of Parkvale were recorded on the Corporation’s balance sheet at their fair values as of January 1, 2012, the acquisition date, and Parkvale’s results of operations have been included in the Corporation’s consolidated statements of income and comprehensive income since that date. Parkvale’s banking affiliate, Parkvale Bank, was merged into FNBPA on January 1, 2012. The warrant issued by Parkvale to the UST under the CPP was assumed by the Corporation and converted into a warrant to purchase up to 819,640 shares of the Corporation’s common stock. The warrant expires December 23, 2018 and has an exercise price of $5.81. Based on the purchase price allocation, which was completed in the fourth quarter of 2012, the Corporation recorded $106,602 in goodwill and $16,033 in core deposit intangibles as a result of the acquisition. None of the goodwill is deductible for income tax purposes.
	Pending Acquisition
	On June 14, 2013, the Corporation announced the signing of a definitive merger agreement to acquire BCSB Bancorp, Inc. (BCSB), a bank holding company based in Baltimore, Maryland with approximately $640,000 in total assets. The transaction is valued at approximately $79,000. Under the terms of the merger agreement, BCSB shareholders will be entitled to receive 2.08 shares of the Corporation’s common stock for each share of BCSB common stock. BCSB’s banking affiliate, Baltimore County Savings Bank, will be merged into FNBPA. The transaction is expected to be completed in the first quarter of 2014, pending regulatory approvals, the approval of BCSB shareholders and the satisfaction of other closing conditions.

NEW_ACCOUNTING_STANDARDS

NEW ACCOUNTING STANDARDS	9 Months Ended
NEW ACCOUNTING STANDARDS	Sep. 30, 2013
Accounting Changes And Error Corrections [Abstract]	'
NEW ACCOUNTING STANDARDS	'
	NEW ACCOUNTING STANDARDS
	Income Taxes
	In July 2013, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (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 is not expected to have a material effect on the financial statements, results of operations or liquidity of the Corporation.
	Derivatives and Hedging
	In July 2013, the FASB issued ASU No. 2013-10, Inclusion of the Fed Funds Effective Swap Rate (or Overnight Index Swap Rate) as a Benchmark Interest Rate for Hedge Accounting Purposes, which establishes the Fed Funds Effective Swap Rate as an acceptable U.S. benchmark interest rate, in addition to the UST and LIBOR swap rates, to provide risk managers with a more comprehensive spectrum of interest rate resets to utilize as the designated benchmark interest rate risk component under the hedge accounting guidance. The requirements of ASU 2013-10 are effective prospectively for qualifying new or redesignated hedging relationships entered into on or after July 17, 2013. The adoption of this update did not have a material effect on the financial statements, results of operations or liquidity of the Corporation.
	Comprehensive Income
	In February 2013, the FASB issued ASU No. 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income, that requires an entity to report the effects of significant reclassifications out of each component of accumulated other comprehensive income on the respective line item in net income if the amount being reclassified is required under GAAP to be reclassified to net income in its entirety in the same reporting period. For amounts not required to be reclassified in their entirety in the same reporting period, an entity shall add a cross reference to the related footnote where additional information about the effect of the reclassification is disclosed. The requirements of ASU 2013-02 were effective prospectively for reporting periods beginning after December 15, 2012. The adoption of this update did not have a material effect on the financial statements, results of operations or liquidity of the Corporation.
	Disclosures about Offsetting Assets and Liabilities
	In January 2013, the FASB issued ASU No. 2013-01, Scope Clarification of Disclosures about Offsetting Assets and Liabilities, that clarifies the scope of its previously issued guidance, limiting the disclosure requirements to derivative instruments, repurchase agreements and reverse repurchase agreements and securities borrowing and lending transactions to the extent that they are offset in the financial statements or subject to an enforceable master netting arrangement or similar agreement. The requirements of ASU 2013-01 are effective on January 1, 2013. 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	9 Months Ended
SECURITIES	Sep. 30, 2013
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:
	September 30, 2013
	U.S. government-sponsored entities		$	336,126			$	412			$	(4,386	)		$	332,152
	Residential mortgage-backed securities:
	Agency mortgage-backed securities			223,125				4,641				(128	)			227,638
	Agency collateralized mortgage obligations			506,672				405				(18,030	)			489,047
	Non-agency collateralized mortgage obligations			1,818				28				—				1,846
	States of the U.S. and political subdivisions			17,472				542				(139	)			17,875
	Collateralized debt obligations			36,451				2,452				(10,199	)			28,704
	Other debt securities			16,478				564				(914	)			16,128

	Total debt securities			1,138,142				9,044				(33,796	)			1,113,390
	Equity securities			1,554				645				(31	)			2,168

			$	1,139,696			$	9,689			$	(33,827	)		$	1,115,558


	December 31, 2012
	U.S. government-sponsored entities		$	352,910			$	1,676			$	(129	)		$	354,457
	Residential mortgage-backed securities:
	Agency mortgage-backed securities			267,575				7,575				—				275,150
	Agency collateralized mortgage obligations			465,574				4,201				(228	)			469,547
	Non-agency collateralized mortgage obligations			2,679				50				—				2,729
	States of the U.S. and political subdivisions			23,592				1,232				—				24,824
	Collateralized debt obligations			34,765				967				(13,276	)			22,456
	Other debt securities			21,790				695				(972	)			21,513

	Total debt securities			1,168,885				16,396				(14,605	)			1,170,676
	Equity securities			1,554				462				(9	)			2,007

			$	1,170,439			$	16,858			$	(14,614	)		$	1,172,683


	Securities Held to Maturity:
	September 30, 2013
	U.S. Treasury		$	503			$	122			$	—			$	625
	U.S. government-sponsored entities			43,403				191				(1,019	)			42,575
	Residential mortgage-backed securities:
	Agency mortgage-backed securities			650,732				14,679				(2,414	)			662,997
	Agency collateralized mortgage obligations			341,743				759				(12,788	)			329,714
	Non-agency collateralized mortgage obligations			7,317				53				—				7,370
	Commercial mortgage-backed securities			2,247				134				(31	)			2,350
	States of the U.S. and political subdivisions			135,047				2,641				(1,667	)			136,021

			$	1,180,992			$	18,579			$	(17,919	)		$	1,181,652


	December 31, 2012
	U.S. Treasury		$	503			$	188			$	—			$	691
	U.S. government-sponsored entities			28,731				280				(99	)			28,912
	Residential mortgage-backed securities:
	Agency mortgage-backed securities			780,022				28,783				(1	)			808,804
	Agency collateralized mortgage obligations			133,976				1,266				—				135,242
	Non-agency collateralized mortgage obligations			14,082				130				—				14,212
	Commercial mortgage-backed securities			1,024				39				—				1,063
	States of the U.S. and political subdivisions			147,713				6,099				—				153,812
Collateralized debt obligations			512				—				(35	)			477

		$	1,106,563			$	36,785			$	(135	)		$	1,143,213


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 ANNB and Parkvale acquisitions as trading securities. The Corporation both acquired and sold these trading securities during the quarters in which the acquisitions occurred. As of September 30, 2013 and December 31, 2012, the Corporation did not hold any trading securities.
Gross gains and gross losses were realized on securities as follows:


		Three Months Ended								Nine Months Ended
		September 30,								September 30,
		2013				2012				2013				2012
Gross gains		$	5			$	355			$	1,120			$	1,151
Gross losses			—				(421	)			(363	)			(849	)

		$	5			$	(66	)		$	757			$	302

As of September 30, 2013, 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		$	—			$	—			$	2,461			$	2,483
Due from one to five years			209,474				209,523				34,366				34,162
Due from five to ten years			150,871				147,783				65,749				66,086
Due after ten years			46,182				37,553				76,377				76,490

			406,527				394,859				178,953				179,221
Residential mortgage-backed securities:
Agency mortgage-backed securities			223,125				227,638				650,732				662,997
Agency collateralized mortgage obligations			506,672				489,047				341,743				329,714
Non-agency collateralized mortgage obligations			1,818				1,846				7,317				7,370
Commercial mortgage-backed securities			—				—				2,247				2,350
Equity securities			1,554				2,168				—				—

		$	1,139,696			$	1,115,558			$	1,180,992			$	1,181,652

Maturities may differ from contractual terms because borrowers may have the right to call or prepay obligations with or without penalties. Periodic payments are received on mortgage-backed securities based on the payment patterns of the underlying collateral.
At September 30, 2013 and December 31, 2012, securities with a carrying value of $1,025,579 and $725,450, respectively, were pledged to secure public deposits, trust deposits and for other purposes as required by law. Securities with a carrying value of $849,901 and $795,812 at September 30, 2013 and December 31, 2012, 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:
September 30, 2013
U.S. government-sponsored entities			12			$	173,836			$	(4,386	)			—			$	—		$	—			12	$	173,836	$	(4,386	)
Residential mortgage-backed securities:
Agency mortgage-backed securities			3				31,737				(128	)			—				—			—			3		31,737		(128	)
Agency collateralized mortgage obligations			28				416,085				(18,030	)			—				—			—			28		416,085		(18,030	)
States of the U.S. and political subdivisions			2				3,134				(139	)			—				—			—			2		3,134		(139	)
Collateralized debt obligations			1				2,195				(3	)			9				8,927			(10,196	)		10		11,122		(10,199	)
Other debt securities			—				—				—				4				5,963			(914	)		4		5,963		(914	)
Equity securities			—				—				—				1				632			(31	)		1		632		(31	)

			46			$	626,987			$	(22,686	)			14			$	15,522		$	(11,141	)		60	$	642,509	$	(33,827	)


December 31, 2012
U.S. government-sponsored entities			3			$	44,868			$	(129	)			—			$	—		$	—			3	$	44,868	$	(129	)
Residential mortgage-backed securities:
Agency collateralized mortgage obligations			3				47,174				(228	)			—				—			—			3		47,174		(228	)
Collateralized debt obligations			7				8,708				(909	)			9				5,532			(12,367	)		16		14,240		(13,276	)
Other debt securities			—				—				—				4				5,899			(972	)		4		5,899		(972	)
Equity securities			1				654				(9	)			—				—			—			1		654		(9	)

			14			$	101,404			$	(1,275	)			13			$	11,431		$	(13,339	)		27	$	112,835	$	(14,614	)


Securities Held to Maturity:
September 30, 2013
U.S. government-sponsored entities			3			$	39,027			$	(1,019	)			—				—			—			3	$	39,027	$	(1,019	)
Residential mortgage-backed securities:
Agency mortgage-backed securities			18				237,938				(2,414	)			—				—			—			18		237,938		(2,414	)
Agency collateralized mortgage obligations			19				274,423				(12,788	)			—				—			—			19		274,423		(12,788	)
Commercial mortgage-backed securities			1				991				(31	)			—				—			—			1		991		(31	)
States of the U.S. and political subdivisions			25				28,327				(1,667	)			—				—			—			25		28,327		(1,667	)

			66			$	580,706			$	(17,919	)			—				—			—			66	$	580,706	$	(17,919	)


December 31, 2012
U.S. government-sponsored entities			1			$	14,901			$	(99	)			—			$	—		$	—			1	$	14,901	$	(99	)
Residential mortgage-backed securities:
Agency mortgage-backed securities			1				1,424				(1	)			—				—			—			1		1,424		(1	)
Collateralized debt obligations			—				—				—				1				477			(35	)		1		477		(35	)

			2			$	16,325			$	(100	)			1			$	477		$	(35	)		3	$	16,802	$	(135	)

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) relate to investments in trust preferred securities (TPS). The Corporation’s portfolio of TPS consists of single-issuer and pooled securities. The single-issuer securities are primarily from money-center and large regional banks and are included in other debt securities. The pooled securities consist of securities issued primarily by banks and thrifts, with some of the pools including a limited number of insurance companies. Investments in pooled securities are all in mezzanine tranches except for two investments in senior tranches, and are secured by over-collateralization or default protection provided by subordinated tranches. The non-credit portion of unrealized losses on investments in TPS is attributable to illiquidity and the uncertainty affecting these markets, as well as changes in interest rates.

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.
When impairment of an equity security is considered to be other-than-temporary, the security is written down to its fair value and an impairment loss is recorded as a loss within non-interest income in the consolidated statement of comprehensive income. When impairment of a debt security is considered to be other-than-temporary, the amount of the OTTI recorded as a loss within non-interest income and thereby recognized in earnings depends on whether the Corporation intends to sell the security or whether it is more likely than not that the Corporation will be required to sell the security before recovery of its amortized cost basis.
If the Corporation intends to sell the debt security or more likely than not will be required to sell the security before recovery of its amortized cost basis, OTTI shall be recognized in earnings equal to the entire difference between the investment’s amortized cost basis and its fair value.
If the Corporation does not intend to sell the debt security and it is not more likely than not the Corporation will be required to sell the security before recovery of its amortized cost basis, OTTI shall be separated into the amount representing credit loss and the amount related to all other market factors. The amount related to credit loss shall be recognized in earnings. The amount related to other market factors shall be recognized in other comprehensive income, net of applicable taxes.
The Corporation performs its OTTI evaluation process in a consistent and systematic manner and includes an evaluation of all available evidence. Documentation of the process is as extensive as necessary to support a conclusion as to whether a decline in fair value below cost or amortized cost is temporary or other-than-temporary and includes documentation supporting both observable and unobservable inputs and a rationale for conclusions reached. In making these determinations for pooled TPS, the Corporation consults with third-party advisory firms to provide additional valuation assistance.
This process considers factors such as the severity, length of time and anticipated recovery period of the impairment, recoveries or additional declines in fair value subsequent to the balance sheet date, recent events specific to the issuer, including investment downgrades by rating agencies and economic conditions in its industry, and the issuer’s financial condition, repayment capacity, capital strength and near-term prospects.
For debt securities, the Corporation also considers the payment structure of the debt security, the likelihood of the issuer being able to make future payments, failure of the issuer of the security to make scheduled interest and principal payments, whether the Corporation has made a decision to sell the security and whether the Corporation’s cash or working capital requirements or contractual or regulatory obligations indicate that the debt security will be required to be sold before a forecasted recovery occurs. For equity securities, the Corporation also considers its intent and ability to retain the security for a period of time sufficient to allow for a recovery in fair value. Among the factors that the Corporation considers in determining its intent and ability to retain the security is a review of its capital adequacy, interest rate risk position and liquidity. The assessment of a security’s ability to recover any decline in fair value, the ability of the issuer to meet contractual obligations, the Corporation’s intent and ability to retain the security, and whether it is more likely than not the Corporation will be required to sell the security before recovery of its amortized cost basis require considerable judgment.
Debt securities with credit ratings below AA at the time of purchase that are repayment-sensitive securities are evaluated using the guidance of ASC 325, Investments – Other. All other securities are required to be evaluated under ASC 320, Investments – Debt Securities.
The Corporation invested in TPS issued by special purpose vehicles (SPVs) that hold pools of collateral consisting of trust preferred and subordinated debt securities issued by banks, bank holding companies, thrifts and insurance companies. The securities issued by the SPVs are generally segregated into several classes known as tranches. Typically, the structure includes senior, mezzanine and equity tranches. The equity tranche represents the first loss position. The Corporation generally holds interests in mezzanine tranches. Interest and principal collected from the collateral held by the SPVs are distributed with a priority that provides the highest level of protection to the senior-most tranches. In order to provide a high level of protection to the senior tranches, cash flows are diverted to higher-level tranches if the principal and interest coverage tests are not met.

The Corporation prices its holdings of TPS using Level 3 inputs in accordance with ASC 820, Fair Value Measurements and Disclosures, and guidance issued by the SEC. In this regard, the Corporation evaluates current available information in estimating the future cash flows of these securities and determines whether there have been favorable or adverse changes in estimated cash flows from the cash flows previously projected. The Corporation considers the structure and term of the pool and the financial condition of the underlying issuers. Specifically, the evaluation incorporates factors such as over-collateralization and interest coverage tests, interest rates and appropriate risk premiums, the timing and amount of interest and principal payments and the allocation of payments to the various tranches. Current estimates of cash flows are based on the most recent trustee reports, announcements of deferrals or defaults, and assumptions regarding expected future default rates, prepayment and recovery rates and other relevant information. In constructing these assumptions, the Corporation considers the following:

	•		that current defaults would have no recovery;

	•		that some individually analyzed deferrals will cure at rates varying from 10% to 90% after the deferral period ends;

	•		recent historical performance metrics, including profitability, capital ratios, loan charge-offs and loan reserve ratios, for the underlying institutions that would indicate a higher probability of default by the institution;

	•		that institutions identified as possessing a higher probability of default would recover at a rate of 10% for banks and 15% for insurance companies;

	•		that financial performance of the financial sector continues to be affected by the economic environment resulting in an expectation of additional deferrals and defaults in the future;

	•		whether the security is currently deferring interest; and

	•		the external rating of the security and recent changes to its external rating.
The primary evidence utilized by the Corporation is the level of current deferrals and defaults, the level of excess subordination that allows for receipt of full principal and interest, the credit rating for each security and the likelihood that future deferrals and defaults will occur at a level that will fully erode the excess subordination based on an assessment of the underlying collateral. The Corporation combines the results of these factors considered in estimating the future cash flows of these securities to determine whether there has been an adverse change in estimated cash flows from the cash flows previously projected.
The Corporation’s portfolio of TPS consists of 23 pooled issues and four single-issuer securities. Two of the pooled issues are senior tranches; the remaining 21 are mezzanine tranches. At September 30, 2013, the pooled TPS had an estimated fair value of $28,704 while the single-issuer TPS had an estimated fair value of $5,963. The Corporation has concluded from the analysis performed at September 30, 2013 that it is probable that the Corporation will collect all contractual principal and interest payments on all of its single-issuer and pooled TPS sufficient to recover the amortized cost basis of the securities.
At September 30, 2013, all four single-issuer TPS are current in regards to their principal and interest payments. Of the 23 pooled TPS, three are accruing interest based on the coupon rate, 18 are accreting income based on future expected cash flows and the remaining two are on non-accrual status. Income of $2,448 and $2,138 was recognized on pooled TPS for the nine months ended September 30, 2013 and 2012, respectively. Included in the amount for the nine months ended September 30, 2012 was $34 recognized on two pooled TPS which were sold in the second quarter of 2012.
The Corporation recognized net impairment losses on securities of $119 for the nine months ended September 30, 2012 due to the write-down of securities that the Corporation deemed to be other-than-temporarily impaired. The Corporation did not recognize any impairment losses on securities for the nine months ended September 30, 2013.

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				Total
		Debt				Non-Agency
		Obligations				CMOs
For the Nine Months Ended September 30, 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


For the Nine Months Ended September 30, 2012
Beginning balance		$	18,369			$	29			$	18,398
Loss where impairment was not previously recognized			119				—				119
Additional loss where impairment was previously recognized			—				—				—
Reduction due to credit impaired securities sold			(1,214	)			(29	)			(1,243	)

Ending balance		$	17,274			$	—			$	17,274

The secondary market for pooled TPS remains limited. Write-downs, when required, are based on an individual security’s credit performance and its ability to make its contractual principal and interest payments. Should credit quality deteriorate to a greater extent than projected, it is possible that additional write-downs may be required. The Corporation monitors actual deferrals and defaults as well as expected future deferrals and defaults to determine if there is a high probability for expected losses and contractual shortfalls of interest or principal, which could warrant further impairment. The Corporation evaluates its entire TPS portfolio each quarter to determine if additional write-downs are warranted.

The following table provides information relating to the Corporation’s TPS as of September 30, 2013:


Deal Name		Class		Current				Amortized				Fair				Unrealized				Lowest	Number of			Actual		Actual		Projected			Expected		Excess
				Par				Cost				Value				Gain (Loss)				Credit	Issuers			Defaults (as		Deferrals (as		Recovery			Defaults (%)		Subordination
				Value																Ratings	Currently			a percent of		a percent of		Rates on			-2		(as a percent
																					Performing			original		original		Current					of current
																								collateral)		collateral)		Deferrals (1)					collateral) (3)
Pooled TPS:
P1		C1		$	5,500			$	2,571			$	1,511			$	(1,060	)		C		42			22		7		41			18		0
P2		C1			4,889				3,073				1,241				(1,832	)		C		41			16		15		41			15		0
P3		C1			5,561				4,357				1,668				(2,689	)		C		47			13		9		34			16		0
P4		C1			3,994				3,120				1,197				(1,923	)		C		52			16		6		42			16		0
P5		B3			2,000				765				364				(401	)		C		14			29		10		48			11		0
P6		B1			3,028				2,497				1,004				(1,493	)		C		50			15		19		51			10		0
P7		C			5,048				828				875				47			C		36			14		22		37			14		0
P8		C			2,011				788				336				(452	)		C		44			16		11		36			17		0.42
P9		A4L			2,000				645				397				(248	)		C		24			16		13		43			11		0

Total OTTI					34,031				18,644				8,593				(10,051	)				350			17		12		41			15


P10		C1			5,220				1,077				1,434				357			C		42			22		7		41			18		0
P11		A2A			5,000				2,198				2,195				(3	)		B+		41			16		15		41			15		47.85
P12		C1			4,781				1,317				1,434				117			C		47			13		9		34			16		0
P13		C1			5,260				1,278				1,576				298			C		52			16		6		42			16		0
P14		C1			5,190				1,063				1,166				103			C		58			15		12		36			17		0
P15		C1			3,206				408				639				231			C		43			19		7		28			16		0
P16		C			3,339				651				673				22			C		36			15		12		28			15		0
P17		B			2,069				672				673				1			Ca		32			13		21		40			12		18.75
P18		B2			5,000				2,228				2,905				677			CCC		20			0		8		10			15		37.52
P19		B			4,070				963				1,340				377			C		44			16		11		36			17		0.52
P20		A1			3,304				1,983				2,037				54			BB-		46			21		6		35			15		54.24
P21		B			5,000				1,307				1,209				(98	)		C		15			18		6		49			11		0
P22		C1			5,531				1,386				1,399				13			C		23			15		12		42			11		0
P23		C1			5,606				1,276				1,431				155			C		23			16		10		44			11		0

Total Not OTTI					62,576				17,807				20,111				2,304					522			16		10		36			15

Total Pooled TPS				$	96,607			$	36,451			$	28,704			$	(7,747	)				872			16		11		38			15

Single Issuer TPS:
S1				$	2,000			$	1,954			$	1,600			$	(354	)		BB		1
S2					2,000				1,924				1,620				(304	)		BBB		1
S3					2,000				2,000				1,943				(57	)		B+		1
S4					1,000				999				800				(199	)		BB		1

Total Single Issuer TPS				$	7,000			$	6,877			$	5,963			$	(914	)				4


Total TPS				$	103,607			$	43,328			$	34,667			$	(8,661	)				876


-1	Some current deferrals are expected to cure at rates varying from 10% to 90% after five years.
-2	Expected future defaults as a percent of remaining performing collateral.
-3	Excess subordination represents the additional defaults in excess of both current and projected defaults that the CDO can absorb before the bond experiences any credit impairment.

States of the U.S. and Political Subdivisions
The Corporation’s municipal bond portfolio of $152,922 as of September 30, 2013 is highly rated with an average entity-specific rating of AA and 98.7% of the portfolio rated A or better. General obligation bonds comprise 99.0% of the portfolio. Geographically, municipal bonds support the Corporation’s footprint as 78.0% of the securities are from municipalities located throughout Pennsylvania. The average holding size of the securities in the municipal bond portfolio is $987. In addition to the strong stand-alone ratings, 67.7% 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	9 Months Ended
FEDERAL HOME LOAN BANK STOCK	Sep. 30, 2013
Text Block [Abstract]	'
FEDERAL HOME LOAN BANK STOCK	'
	FEDERAL HOME LOAN BANK STOCK
	The Corporation is a member of the Federal Home Loan Bank (FHLB) of Pittsburgh. The FHLB requires members to purchase and hold a specified minimum level of FHLB stock based upon their level of borrowings, collateral balances and participation in other programs offered by the FHLB. Stock in the FHLB is non-marketable and is redeemable at the discretion of the FHLB. Both cash and stock dividends on FHLB stock are reported as income.
	Members do not purchase stock in the FHLB for the same reasons that traditional equity investors acquire stock in an investor-owned enterprise. Rather, members purchase stock to obtain access to the low-cost products and services offered by the FHLB. Unlike equity securities of traditional for-profit enterprises, the stock of FHLB does not provide its holders with an opportunity for capital appreciation because, by regulation, FHLB stock can only be purchased, redeemed and transferred at par value.
	At September 30, 2013 and December 31, 2012, the Corporation’s FHLB stock totaled $21,636 and $24,560, 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	9 Months Ended
LOANS AND ALLOWANCE FOR LOAN LOSSES	Sep. 30, 2013
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
	September 30, 2013
	Commercial real estate		$	2,548,278			$	372,530			$	2,920,808
	Commercial and industrial			1,689,467				65,768				1,755,235
	Commercial leases			141,714				—				141,714

	Total commercial loans and leases			4,379,459				438,298				4,817,757
	Direct installment			1,349,804				58,735				1,408,539
	Residential mortgages			669,978				361,827				1,031,805
	Indirect installment			631,030				7,282				638,312
	Consumer lines of credit			804,453				83,528				887,981
	Other			52,511				—				52,511

			$	7,887,235			$	949,670			$	8,836,905

	December 31, 2012
	Commercial real estate		$	2,448,471			$	258,575			$	2,707,046
	Commercial and industrial			1,555,301				47,013				1,602,314
	Commercial leases			130,133				—				130,133

	Total commercial loans and leases			4,133,905				305,588				4,439,493
	Direct installment			1,108,865				69,665				1,178,530
	Residential mortgages			653,826				438,402				1,092,228
	Indirect installment			568,324				13,713				582,037
	Consumer lines of credit			732,534				72,960				805,494
	Other			39,937				—				39,937

			$	7,237,391			$	900,328			$	8,137,719

	The carrying amount of acquired loans at September 30, 2013 totaled $944,954, including purchased credit-impaired (PCI) loans with a carrying amount of $16,559, while the carrying amount of acquired loans at December 31, 2012 totaled $896,148, including PCI loans with a carrying amount of $15,864. The outstanding contractual balance receivable of acquired loans at September 30, 2013 totaled $1,011,890, including PCI loans with an outstanding contractual balance receivable of $43,767, while the outstanding contractual balance receivable of acquired loans at December 31, 2012 totaled $949,862, including PCI loans with an outstanding contractual balance receivable of $41,134.
	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, northeastern Ohio, northern West Virginia and central Maryland. The commercial real estate portfolio also includes run-off loans in Florida, which totaled $49,189 or 0.6% of total loans at September 30, 2013, compared to $68,627 or 0.8% of total loans at December 31, 2012. Additionally, the total loan portfolio contains consumer finance loans to individuals in Pennsylvania, Ohio, Tennessee and Kentucky, which equaled $175,123 or 2.0% of total loans at September 30, 2013, compared to $170,999 or 2.1% of total loans at December 31, 2012. Due to the relative size of the consumer finance loan portfolio, they are not segregated from other consumer loans.
	As of September 30, 2013, 45.2% of the commercial real estate loans were owner-occupied, while the remaining 54.8% were non-owner-occupied, compared to 46.5% and 53.5%, respectively, as of December 31, 2012. As of September 30, 2013 and December 31, 2012, the Corporation had commercial construction loans of $215,433 and $190,206, respectively, representing 2.4% and 2.3% of total loans, respectively.
	ASC 310-30 Loans
	All loans acquired in the ANNB and Parkvale 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 ASC310-30 (impaired and non-impaired) acquired from ANNB in 2013 and Parkvale in 2012:


			Acquired				Acquired				Total
			Impaired				Performing
			Loans				Loans
	Acquired from ANNB in 2013
	Contractually required cash flows at acquisition		$	12,200			$	270,197			$	282,397
	Non-accretable difference (expected losses and foregone interest)			(7,829	)			(13,705	)			(21,534	)

	Cash flows expected to be collected at acquisition			4,371				256,492				260,863
	Accretable yield			(523	)			(41,207	)			(41,730	)

	Basis in acquired loans at acquisition		$	3,848			$	215,285			$	219,133


	Acquired from Parkvale in 2012
	Contractually required cash flows at acquisition		$	12,224			$	1,327,342			$	1,339,566
	Non-accretable difference (expected losses and foregone interest)			(6,070	)			(214,541	)			(220,611	)

	Cash flows expected to be collected at acquisition			6,154				1,112,801				1,118,955
	Accretable yield			(589	)			(293,594	)			(294,183	)

Basis in acquired loans at acquisition		$	5,565			$	819,207			$	824,772

The following table provides a summary of change in accretable yield for all acquired loans:


		Acquired				Acquired				Total
		Impaired				Performing
		Loans				Loans
Nine Months Ended September 30, 2013
Balance at beginning of period		$	778			$	253,375			$	254,153
Acquisitions			523				41,207				41,730
Reduction due to unexpected early payoffs			—				(37,432	)			(37,432	)
Reclass from non-accretable difference			6,318				1,555				7,873
Disposals/transfers			164				(210	)			(46	)
Accretion			(2,250	)			(27,629	)			(29,879	)

Balance at end of period		$	5,533			$	230,866			$	236,399


Year Ended December 31, 2012
Balance at beginning of period		$	2,477			$	49,229			$	51,706
Acquisitions			589				293,594				294,183
Reduction due to unexpected early payoffs			—				(57,840	)			(57,840	)
Reclass from non-accretable difference			3,539				10,915				14,454
Disposals/transfers			(49	)			(615	)			(664	)
Accretion			(5,778	)			(41,908	)			(47,686	)

Balance at end of period		$	778			$	253,375			$	254,153

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 identified in the Corporation’s acquisition of ANNB:


		At				September 30,
		Acquisition				2013
Outstanding balance		$	12,220			$	11,867
Carrying amount			3,848				3,442
Allowance for loan losses			n/a				—
Impairment recognized since acquisition			n/a				—
Allowance reduction recognized since acquisition			n/a				—

Following is information about PCI loans identified in the Corporation’s acquisition of Parkvale:


		At				December 31,
		Acquisition				2012
Outstanding balance		$	9,135			$	3,704
Carrying amount			5,565				2,552
Allowance for loan losses			n/a				103
Impairment recognized since acquisition			n/a				103
Allowance reduction recognized since acquisition			n/a				—
Following is information about the Corporation’s PCI loans:


		Outstanding				Non-				Expected				Accretable			Recorded
		Balance				Accretable				Cash Flows				Yield			Investment
						Difference
For the Nine Months Ended September 30, 2013
Balance at beginning of period		$	41,134			$	(23,733	)		$	17,401			$	(778	)	$	16,623
Acquisitions			12,220				(7,849	)			4,371				(523	)		3,848
Accretion			—				—				—				2,250			2,250
Payments received			(3,087	)			—				(3,087	)			—			(3,087	)
Reclass from non-accretable difference			—				6,318				6,318				(6,318	)		—
Disposals/transfers			(8,442	)			6,193				(2,249	)			(164	)		(2,413	)
Contractual interest			1,942				(1,942	)			—				—			—

Balance at end of period		$	43,767			$	(21,013	)		$	22,754			$	(5,533	)	$	17,221


For the Year Ended December 31, 2012
Balance at beginning of period		$	51,693			$	(33,377	)		$	18,316			$	(2,477	)	$	15,839
Acquisitions			9,135				(2,981	)			6,154				(589	)		5,565
Accretion			—				—				—				5,778			5,778
Payments received			(9,556	)			—				(9,556	)			—			(9,556	)
Reclass from non-accretable difference			—				3,539				3,539				(3,539	)		—
Disposals/transfers			(12,494	)			11,442				(1,052	)			49			(1,003	)
Contractual interest			2,356				(2,356	)			—				—			—

Balance at end of period		$	41,134			$	(23,733	)		$	17,401			$	(778	)	$	16,623

The accretion in the table above includes $440 in 2013 and $3,539 in 2012 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:


		September 30,				December 31,
		2013				2012
Non-accrual loans		$	65,451			$	66,004
Troubled debt restructurings			17,252				14,876

Total non-performing loans			82,703				80,880
Other real estate owned (OREO)			35,144				35,257

Total non-performing loans and OREO			117,847				116,137
Non-performing investments			733				2,809

Total non-performing assets		$	118,580			$	118,946


Asset quality ratios:
Non-performing loans as a percent of total loans			0.94	%			0.99	%
Non-performing loans + OREO as a percent of total loans + OREO			1.33	%			1.42	%
Non-performing assets as a percent of total assets			0.93	%			0.99	%
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:
September 30, 2013
Commercial real estate		$	7,041			$	301			$	47,151			$	54,493		$	2,493,785		$	2,548,278
Commercial and industrial			4,068				459				8,081				12,608			1,676,859			1,689,467
Commercial leases			836				—				782				1,618			140,096			141,714

Total commercial loans and leases			11,945				760				56,014				68,719			4,310,740			4,379,459
Direct installment			9,952				2,515				4,462				16,929			1,332,875			1,349,804
Residential mortgages			12,331				1,986				3,694				18,011			651,967			669,978
Indirect installment			4,815				607				975				6,397			624,633			631,030
Consumer lines of credit			2,146				1,113				306				3,565			800,888			804,453
Other			23				37				—				60			52,451			52,511

		$	41,212			$	7,018			$	65,451			$	113,681		$	7,773,554		$	7,887,235


December 31, 2012
Commercial real estate		$	5,786			$	533			$	47,895			$	54,214		$	2,394,257		$	2,448,471
Commercial and industrial			7,310				456				6,017				13,783			1,541,518			1,555,301
Commercial leases			1,671				—				965				2,636			127,497			130,133

Total commercial loans and leases			14,767				989				54,877				70,633			4,063,272			4,133,905
Direct installment			8,834				2,717				3,342				14,893			1,093,972			1,108,865
Residential mortgages			15,821				2,365				2,891				21,077			632,749			653,826
Indirect installment			5,114				374				1,039				6,527			561,797			568,324
Consumer lines of credit			1,633				247				355				2,235			730,299			732,534
Other			36				15				3,500				3,551			36,386			39,937

		$	46,205			$	6,707			$	66,004			$	118,916		$	7,118,475		$	7,237,391



		30-89				³ 90 Days				Non-Accrual				Total			Current			Discount			Total
		Days				Past Due								Past									Loans
		Past Due				and Still								Due (1)
						Accruing
Acquired Loans:
September 30, 2013
Commercial real estate		$	4,681			$	16,002				—			$	20,683		$	370,373		$	(18,526	)	$	372,530
Commercial and industrial			3,396				4,500				—				7,896			63,566			(5,694	)		65,768
Commercial leases			—				—				—				—			—			—			—

Total commercial loans and leases			8,077				20,502				—				28,579			433,939			(24,220	)		438,298
Direct installment			1,147				1,023				—				2,170			53,785			2,780			58,735
Residential mortgages			7,272				19,002				—				26,274			370,609			(35,056	)		361,827
Indirect installment			246				38				—				284			7,661			(663	)		7,282
Consumer lines of credit			226				893				—				1,119			87,470			(5,061	)		83,528
Other			—				—				—				—			—			—			—

		$	16,968			$	41,458				—			$	58,426		$	953,464		$	(62,220	)	$	949,670


December 31, 2012
Commercial real estate		$	6,829			$	13,597				—			$	20,426		$	250,116		$	(11,967	)	$	258,575
Commercial and industrial			1,653				138				—				1,791			47,351			(2,129	)		47,013
Commercial leases			—				—				—				—			—			—			—

Total commercial loans and leases			8,482				13,735				—				22,217			297,467			(14,096	)		305,588
Direct installment			1,454				947				—				2,401			63,502			3,762			69,665
Residential mortgages			12,137				21,069				—				33,206			439,620			(34,424	)		438,402
Indirect installment			347				56				—				403			14,089			(779	)		13,713
Consumer lines of credit			379				778				—				1,157			75,800			(3,997	)		72,960
Other			—				—				—				—			—			—			—

		$	22,799			$	36,585				—			$	59,384		$	890,478		$	(49,534	)	$	900,328


-1	Past due information for loans acquired is based on the contractual balance outstanding at September 30, 2013 and December 31, 2012.
The Corporation utilizes the following categories to monitor credit quality within its commercial loan portfolio:


Rating		Definition
Category		Definition
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
		Pass				Mention				Substandard				Doubtful			Total
Originated Loans:
September 30, 2013
Commercial real estate		$	2,388,404			$	46,750			$	110,342			$	2,782		$	2,548,278
Commercial and industrial			1,550,195				80,987				57,966				319			1,689,467
Commercial leases			139,966				764				984				—			141,714

		$	4,078,565			$	128,501			$	169,292			$	3,101		$	4,379,459


December 31, 2012
Commercial real estate		$	2,282,139			$	57,938			$	106,258			$	2,136		$	2,448,471
Commercial and industrial			1,472,598				32,227				49,814				662			1,555,301
Commercial leases			126,283				243				3,607				—			130,133

		$	3,881,020			$	90,408			$	159,679			$	2,798		$	4,133,905


Acquired Loans:
September 30, 2013
Commercial real estate		$	277,806			$	47,663			$	45,673			$	1,388		$	372,530
Commercial and industrial			49,105				5,067				11,582				14			65,768
Commercial leases			—				—				—				—			—

		$	326,911			$	52,730			$	57,255			$	1,402		$	438,298


December 31, 2012
Commercial real estate		$	204,300			$	14,713			$	39,093			$	469		$	258,575
Commercial and industrial			39,596				3,611				3,804				2			47,013
Commercial leases			—				—				—				—			—

		$	243,896			$	18,324			$	42,897			$	471		$	305,588

Credit quality information for acquired loans is based on the contractual balance outstanding at September 30, 2013 and December 31, 2012. The increase in acquired loans in 2013 primarily relates to the ANNB acquisition on April 6, 2013.
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
September 30, 2013
Direct installment		$	1,339,139			$	10,665			$	1,349,804
Residential mortgages			656,674				13,304				669,978
Indirect installment			629,838				1,092				631,030
Consumer lines of credit			803,904				549				804,453
Other			52,511				—				52,511

December 31, 2012
Direct installment		$	1,100,324			$	8,541			$	1,108,865
Residential mortgages			642,406				11,420				653,826
Indirect installment			567,192				1,132				568,324
Consumer lines of credit			731,788				746				732,534
Other			36,437				3,500				39,937
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 Nine Months Ended September 30, 2013
With no specific allowance recorded:
Commercial real estate		$	34,281			$	46,548			$	—			$	34,165
Commercial and industrial			9,308				11,377				—				9,448
Commercial leases			782				782				—				729

Total commercial loans and leases			44,371				58,707				—				44,342
Direct installment			10,665				10,901				—				10,451
Residential mortgages			13,298				13,561				—				13,767
Indirect installment			1,092				2,491				—				1,169
Consumer lines of credit			549				609				—				631
Other			—				—				—				583

With a specific allowance recorded:
Commercial real estate			14,300				23,748				2,782				14,379
Commercial and industrial			124				131				124				126
Commercial leases			—				—				—				—

Total commercial loans and leases			14,424				23,879				2,906				14,505
Direct installment			—				—				—				—
Residential mortgages			—				—				—				—
Indirect installment			—				—				—				—
Consumer lines of credit			—				—				—				—
Other			—				—				—				—

Total:
Commercial real estate			48,581				70,296				2,782				48,544
Commercial and industrial			9,432				11,508				124				9,574
Commercial leases			782				782				—				729

Total commercial loans and leases			58,795				82,586				2,906				58,847
Direct installment			10,665				10,901				—				10,451
Residential mortgages			13,298				13,561				—				13,767
Indirect installment			1,092				2,491				—				1,169
Consumer lines of credit			549				609				—				631
Other			—				—				—				583
At or For the Year Ended December 31, 2012
With no specific allowance recorded:
Commercial real estate		$	37,119			$	50,234			$	—			$	36,426
Commercial and industrial			7,074				9,597				—				6,992
Commercial leases			965				—				—				1,053

Total commercial loans and leases			45,158				59,831				—				44,471
Direct installment			8,541				8,693				—				6,443
Residential mortgages			11,414				11,223				—				9,059
Indirect installment			1,132				2,381				—				1,133
Consumer lines of credit			746				792				—				591
Other			3,500				3,500				—				3,500

With a specific allowance recorded:
Commercial real estate			12,623				21,877				2,136				14,522
Commercial and industrial			590				590				590				592
Commercial leases			—				—				—				—

Total commercial loans and leases			13,213				22,467				2,726				15,114
Direct installment			—				—				—				—
Residential mortgages			—				—				—				—
Indirect installment			—				—				—				—
Consumer lines of credit			—				—				—				—
Other			—				—				—				—

Total:
Commercial real estate			49,742				72,111				2,136				50,948
Commercial and industrial			7,664				10,187				590				7,584
Commercial leases			965				—				—				1,053

Total commercial loans and leases			58,371				82,298				2,726				59,585
Direct installment			8,541				8,693				—				6,443
Residential mortgages			11,414				11,223				—				9,059
Indirect installment			1,132				2,381				—				1,133
Consumer lines of credit			746				792				—				591
Other			3,500				3,500				—				3,500
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 $17,221 at September 30, 2013 and $16,623 at December 31, 2012. 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 $1,443; commercial and industrial of $1,023; direct installment of $916: residential mortgages of $1,039; and indirect installment of $295, totaling $4,716 at September 30, 2013 and commercial real estate of $1,955; commercial and industrial of $1,140; direct installment of $657; residential mortgages of $69; and indirect installment of $359, totaling $4,180 at December 31, 2012.
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:


		September 30,				December 31,
		2013				2012
Accruing:
Performing		$	10,102			$	12,659
Non-performing			17,252				14,876
Non-accrual			12,185				12,385

		$	39,539			$	39,920

TDRs that are accruing and performing include loans that met the criteria for non-accrual of interest prior to restructuring for which the Corporation can reasonably estimate the timing and amount of the expected cash flows on such loans and for which the Corporation expects to fully collect the new carrying value of the loans. During the nine months ended September 30, 2013, the Corporation returned to performing status $1,737 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 $756 and $41 at September 30, 2013 and December 31, 2012, respectively, and pooled reserves for individual loans under $500 of $108 and $297 for those same 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 $1,096 and $1,455 at September 30, 2013 and December 31, 2012, 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												Nine Months Ended
		September 30, 2013												September 30, 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			2			$	212			$	207				7		$	1,252		$	1,031
Commercial and industrial			—				—				—				—			—			—
Commercial leases			—				—				—				—			—			—

Total commercial loans and leases			2				212				207				7			1,252			1,031
Direct installment			117				1,199				1,168				300			3,078			2,930
Residential mortgages			9				346				348				39			1,809			1,784
Indirect installment			5				20				18				20			92			84
Consumer lines of credit			1				6				6				14			207			204
Other			—				—				—				—			—			—

			134			$	1,783			$	1,747				380		$	6,438		$	6,033



		Three Months Ended												Nine Months Ended
		30-Sep-12												30-Sep-12
		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			13			$	2,183			$	2,245				16		$	2,341		$	2,971
Commercial and industrial			4				51				48				7			254			123
Commercial leases			—				—				—				—			—			—

Total commercial loans and leases			17				2,234				2,293				23			2,595			3,094
Direct installment			50				237				228				229			1,597			1,557
Residential mortgages			15				934				996				39			2,085			2,266
Indirect installment			4				30				30				17			105			97
Consumer lines of credit			2				2				3				4			5			5
Other			—				—				—				—			—			—

			88			$	3,437			$	3,550				312		$	6,387		$	7,019


Following is a summary of TDRs, by class of loans, for which there was a payment default during the periods indicated, 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								Nine Months Ended
		September 30, 2013 (1)								September 30, 2013 (1)
		Number of				Recorded				Number of				Recorded
		Contracts				Investment				Contracts				Investment
Commercial real estate			—			$	—				1			$	751
Commercial and industrial			—				—				1				15
Commercial leases			—				—				—				—

Total commercial loans and leases			—				—				2				766
Direct installment			24				254				53				509
Residential mortgages			2				99				5				240
Indirect installment			—				—				4				37
Consumer lines of credit			1				85				1				85
Other			—				—				—				—

			27			$	438				65			$	1,637



		Three Months Ended								Nine Months Ended
		September 30, 2012 (1)								September 30, 2012 (1)
		Number of				Recorded				Number of				Recorded
		Contracts				Investment				Contracts				Investment
Commercial real estate			—			$	—				—			$	—
Commercial and industrial			—				—				—				—
Commercial leases			—				—				—				—

Total commercial loans and leases			—				—				—				—
Direct installment			21				138				27				165
Residential mortgages			1				25				3				208
Indirect installment			2				6				3				8
Consumer lines of credit			—				—				—				—
Other			—				—				—				—

			24			$	169				33			$	381


-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.

Management estimates the allowance for loan losses pursuant to ASC 450, Contingencies, and ASC 310, Receivables. ASC 310 is applied to commercial loans that are individually evaluated for impairment. Under ASC 310, a loan is impaired when, based upon current information and events, it is probable that the loan will not be repaid according to its original contractual terms, including both principal and interest. Management performs individual assessments of impaired commercial loan relationships greater than or equal to $500 to determine the existence of loss exposure and, where applicable, the extent of loss exposure 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. Commercial loans excluded from individual assessment, as well as smaller balance homogeneous loans, such as consumer installment, residential mortgages, consumer lines of credit and commercial leases, are evaluated for loss exposure under ASC 450 based upon historical loss rates for each of these categories of loans.
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 September 30, 2013
Commercial real estate		$	35,666			$	(365	)		$	80			$	(285	)	$	(538	)	$	34,843
Commercial and industrial			32,486				(1,529	)			231				(1,298	)		1,460			32,648
Commercial leases			1,756				(69	)			59				(10	)		21			1,767

Total commercial loans and leases			69,908				(1,963	)			370				(1,593	)		943			69,258
Direct installment			15,993				(2,183	)			227				(1,956	)		3,194			17,231
Residential mortgages			5,120				(174	)			50				(124	)		437			5,433
Indirect installment			5,626				(807	)			188				(619	)		1,120			6,127
Consumer lines of credit			6,421				(454	)			60				(394	)		1,052			7,079
Other			(219	)			(333	)			—				(333	)		760			208

Total allowance on originated loans			102,849				(5,914	)			895				(5,019	)		7,506			105,336


Purchased credit-impaired loans			325				—				—				—			337			662
Other acquired loans			5,106				70				(559	)			(489	)		(563	)		4,054

Total allowance on acquired loans			5,431				70				(559	)			(489	)		(226	)		4,716


Total allowance		$	108,280			$	(5,844	)		$	336			$	(5,508	)	$	7,280		$	110,052


Three Months Ended September 30, 2012
Commercial real estate		$	38,480			$	(1,481	)		$	1,375			$	(106	)	$	(3,360	)	$	35,014
Commercial and industrial			30,779				(3,746	)			(19	)			(3,765	)		4,861			31,875
Commercial leases			1,674				(216	)			78				(138	)		214			1,750

Total commercial loans and leases			70,933				(5,443	)			1,434				(4,009	)		1,715			68,639
Direct installment			14,536				(1,985	)			225				(1,760	)		1,929			14,705
Residential mortgages			4,259				(3	)			4				1			256			4,516
Indirect installment			5,666				(688	)			158				(530	)		539			5,675
Consumer lines of credit			5,266				(831	)			37				(794	)		1,556			6,028
Other			203				(270	)			—				(270	)		229			162

Total allowance on originated loans			100,863				(9,220	)			1,858				(7,362	)		6,224			99,725


Purchased credit-impaired loans			784				—				—				—			2,205			2,989
Other acquired loans			—				—				—				—			—			—

Total allowance on acquired loans			784				—				—				—			2,205			2,989


Total allowance		$	101,647			$	(9,220	)		$	1,858			$	(7,362	)	$	8,429		$	102,714

Nine Months Ended September 30, 2013
Commercial real estate		$	34,810			$	(3,067	)		$	1,606			$	(1,461	)	$	1,494		$	34,843
Commercial and industrial			31,849				(4,262	)			734				(3,528	)		4,327			32,648
Commercial leases			1,744				(317	)			161				(156	)		179			1,767

Total commercial loans and leases			68,403				(7,646	)			2,501				(5,145	)		6,000			69,258
Direct installment			15,130				(6,824	)			709				(6,115	)		8,216			17,231
Residential mortgages			5,155				(733	)			90				(643	)		921			5,433
Indirect installment			5,449				(2,349	)			576				(1,773	)		2,451			6,127
Consumer lines of credit			6,057				(1,183	)			209				(974	)		1,996			7,079
Other			—				(721	)			—				(721	)		929			208

Total allowance on originated loans			100,194				(19,456	)			4,085				(15,371	)		20,513			105,336


Purchased credit-impaired loans			759				(156	)			—				(156	)		59			662
Other acquired loans			3,421				(1,199	)			(320	)			(1,519	)		2,152			4,054

Total allowance on acquired loans			4,180				(1,355	)			(320	)			(1,675	)		2,211			4,716


Total allowance		$	104,374			$	(20,811	)		$	3,765			$	(17,046	)	$	22,724		$	110,052


Nine Months Ended September 30, 2012
Commercial real estate		$	43,283			$	(4,733	)		$	1,634			$	(3,099	)	$	(5,170	)	$	35,014
Commercial and industrial			25,476				(7,086	)			349				(6,737	)		13,136			31,875
Commercial leases			1,556				(509	)			177				(332	)		526			1,750

Total commercial loans and leases			70,315				(12,328	)			2,160				(10,168	)		8,492			68,639
Direct installment			14,814				(5,908	)			721				(5,187	)		5,078			14,705
Residential mortgages			4,437				(644	)			127				(517	)		596			4,516
Indirect installment			5,503				(2,128	)			433				(1,695	)		1,867			5,675
Consumer lines of credit			5,447				(1,585	)			146				(1,439	)		2,020			6,028
Other			146				(716	)			—				(716	)		732			162

Total allowance on originated loans			100,662				(23,309	)			3,587				(19,722	)		18,785			99,725


Purchased credit-impaired loans			—				(254	)			—				(254	)		3,243			2,989
Other acquired loans			—				—				—				—			—			—

Total allowance on acquired loans			—				(254	)			—				(254	)		3,243			2,989


Total allowance		$	100,662			$	(23,563	)		$	3,587			$	(19,976	)	$	22,028		$	102,714


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
September 30, 2013
Commercial real estate		$	2,782			$	32,061			$	2,548,278			$	35,740		$	2,512,538
Commercial and industrial			124				32,524				1,689,467				5,357			1,684,110
Commercial leases			—				1,767				141,714				—			141,714

Total commercial loans and leases			2,906				66,352				4,379,459				41,097			4,338,362
Direct installment			—				17,231				1,349,804				—			1,349,804
Residential mortgages			—				5,433				669,978				—			669,978
Indirect installment			—				6,127				631,030				—			631,030
Consumer lines of credit			—				7,079				804,453				—			804,453
Other			—				208				52,511				—			52,511

		$	2,906			$	102,430			$	7,887,235			$	41,097		$	7,846,138


December 31, 2012
Commercial real estate		$	2,136			$	32,674			$	2,448,471			$	35,024		$	2,413,447
Commercial and industrial			590				31,259				1,555,301				1,624			1,553,677
Commercial leases			—				1,744				130,133				—			130,133

Total commercial loans and leases			2,726				65,677				4,133,905				36,648			4,097,257
Direct installment			—				15,130				1,108,865				—			1,108,865
Residential mortgages			—				5,155				653,826				—			653,826
Indirect installment			—				5,449				568,324				—			568,324
Consumer lines of credit			—				6,057				732,534				—			732,534
Other			—				—				39,937				—			39,937

		$	2,726			$	97,468			$	7,237,391			$	36,648		$	7,200,743

BORROWINGS

BORROWINGS	9 Months Ended
BORROWINGS	Sep. 30, 2013
Debt Disclosure [Abstract]	'
BORROWINGS	'
	BORROWINGS
	Following is a summary of short-term borrowings:


		September 30,		December 31,
		2013		2012
	Securities sold under repurchase agreements	$	834,610	$	807,820
	Federal funds purchased		200,000		140,000
	Subordinated notes		131,570		135,318

		$	1,166,180	$	1,083,138

	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:


		September 30,		December 31,
		2013		2012
	Federal Home Loan Bank advances	$	79	$	88
	Subordinated notes		82,457		79,897
	Other subordinated debt		8,691		8,850
	Convertible debt		580		590

		$	91,807	$	89,425


	The Corporation’s banking affiliate has available credit with the FHLB of $3,212,358 of which $79 was used as of September 30, 2013. 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 range from 3.78% to 4.19% for the nine months ended September 30, 2013 and for the year ended December 31, 2012.

JUNIOR_SUBORDINATED_DEBT

JUNIOR SUBORDINATED DEBT	9 Months Ended
JUNIOR SUBORDINATED DEBT	Sep. 30, 2013
Text Block [Abstract]	'
JUNIOR SUBORDINATED DEBT	'
	JUNIOR SUBORDINATED DEBT
	The Corporation has five unconsolidated subsidiary trusts (collectively, the Trusts): F.N.B. Statutory Trust I, F.N.B. Statutory Trust II, Omega Financial Capital Trust I, Sun Bancorp Statutory Trust I and Annapolis Bancorp Statutory Trust I. One hundred percent of the common equity of each Trust is owned by the Corporation. The Trusts were formed for the purpose of issuing Corporation-obligated mandatorily redeemable capital securities (TPS) to third-party investors. The proceeds from the sale of TPS and the issuance of common equity by the Trusts were invested in junior subordinated debt securities (subordinated debt) issued by the Corporation, which are the sole assets of each Trust. Since third-party investors are the primary beneficiaries, the Trusts are not consolidated in the Corporation’s financial statements. The Trusts pay dividends on the TPS at the same rate as the distributions paid by the Corporation on the junior subordinated debt held by the Trusts. Annapolis Bancorp Statutory Trust I was acquired in conjunction with the ANNB acquisition completed on April 6, 2013. Omega Financial Capital Trust I and Sun Bancorp Statutory Trust I were acquired as a result of a previous acquisition.
	Distributions on the subordinated debt issued to the Trusts are recorded as interest expense by the Corporation. The TPS are subject to mandatory redemption, in whole or in part, upon repayment of the subordinated debt. The TPS are eligible for redemption, at any time, at the Corporation’s discretion. 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 second quarter of 2013, $15,000 of the Corporation-issued TPS was repurchased at a discount and the related debt extinguished. This $15,000 was opportunistically purchased at auction and represents a portion of the underlying collateral of a pooled TPS that was liquidated by the trustee. The regulatory capital ratios at September 30, 2013 reflect this $15,000 debt extinguishment of TPS.
	The following table provides information relating to the Trusts as of September 30, 2013:


		Trust		Common		Junior		Stated		Interest
		Preferred		Securities		Subordinated		Maturity		Rate
		Securities				Debt		Date
	F.N.B. Statutory Trust I	$	110,000	$	3,866	$	113,866		3/31/33		3.52	%	Variable; LIBOR + 325 basis points (bps)
	F.N.B. Statutory Trust II		21,500		665		22,165		6/15/36		1.9	%	Variable; LIBOR + 165 bps
	Omega Financial Capital Trust I		36,000		1,114		36,016		10/18/34		2.46	%	Variable; LIBOR + 219 bps
	Sun Bancorp Statutory Trust I		16,500		511		17,011		2/22/31		10.2	%	Fixed
	Annapolis Bancorp Statutory Trust I		5,000		155		5,155		3/26/33		3.4	%	Variable; LIBOR + 315 bps

		$	189,000	$	6,311	$	194,213

DERIVATIVE_INSTRUMENTS

DERIVATIVE INSTRUMENTS	9 Months Ended
DERIVATIVE INSTRUMENTS	Sep. 30, 2013
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.
	Risk Management Derivatives
	The Corporation entered into four separate interest rate derivative agreements between December 2012 and August 2013 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- and six- month periods ended September 30, 2013.
	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 September 30, 2013, the Corporation was party to 300 swaps with customers with notional amounts totaling $801,609 and 266 swaps with derivative counterparties with notional amounts totaling $1,001,609.

	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:
	September 30, 2013
	Derivative assets subject to master netting arrangement:
	Interest rate contracts		$	2,225			—		$	2,225
	Equity contracts			18			—			18

	Derivative assets not subject to master netting arrangement:
	Interest rate contracts			35,799			—			35,799

	Total derivative assets		$	38,042			—		$	38,042


	December 31, 2012
	Derivative assets subject to master netting arrangement:
	Equity contracts		$	16			—		$	16

	Derivative assets not subject to master netting arrangement:
	Interest rate contracts			57,992			—			57,992

	Total derivative assets		$	58,008			—		$	58,008


	Offsetting of Derivative Liabilities:
	September 30, 2013
	Derivative liabilities subject to master netting arrangement:
	Interest rate contracts		$	43,045			—		$	43,045

	Derivative liabilities not subject to master netting arrangement:
	Interest rate contracts			1,409			—			1,409
	Equity contracts			18			—			18

	Total derivative liabilities		$	44,472			—		$	44,472


	December 31, 2012
	Derivative liabilities subject to master netting arrangement:
	Interest rate contracts		$	58,134			—		$	58,134

	Derivative liabilities not subject to master netting arrangement:
	Equity contracts			16			—			16

Total derivative liabilities		$	58,150			—		$	58,150


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 Amount
		Presented in the			Instruments			Collateral
		Balance Sheet						Received
Derivative Assets:
September 30, 2013
Counterparty B		$	2		$	2		$	—		$	—
Counterparty D			205			205			—			—
Counterparty E			936			936			—			—
Counterparty F			205			205			—			—
Counterparty G			112			112			—			—
Counterparty I			386			386			—			—
Counterparty J			397			—			397			—

		$	2,243		$	1,846		$	397			—


December 31, 2012
Counterparty E		$	16			—			—		$	16


Derivative Liabilities:
September 30, 2013
Counterparty A		$	5,528		$	5,528		$	—		$	—
Counterparty B			3,714			3,612			—			102
Counterparty C			1,589			1,589			—			—
Counterparty D			10,131			10,131			—			—
Counterparty E			6,069			6,069			—			—
Counterparty F			25			25			—			—
Counterparty G			5,213			5,213			—			—
Counterparty H			2,634			125			—			2,509
Counterparty I			6,629			6,629			—			—
Counterparty J			1,513			—			1,513			—

		$	43,045		$	38,921		$	1,513		$	2,611


December 31, 2012
Counterparty A		$	8,393		$	8,393			—		$	—
Counterparty B			5,601			5,601			—			—
Counterparty C			2,145			2,145			—			—
Counterparty D			12,354			12,354			—			—
Counterparty E			8,846			8,846			—			—
Counterparty F			353			282			—			71
Counterparty G			5,497			5,497			—			—
Counterparty H			3,937			1,775			—			2,162
Counterparty I			11,008			11,008			—			—

		$	58,134		$	55,901			—		$	2,233

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


		Income			Nine Months Ended
		Statement			September 30,
		Location			2013			2012
Interest Rate Products			Other income		$	40		$	40

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 September 30, 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 $42,093. At September 30, 2013, the Corporation has posted collateral with derivative counterparties with a fair value of $39,493 and cash collateral of $1,699. 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 $3,014 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 September 30, 2013 are not material.

COMMITMENTS_CREDIT_RISK_AND_CO

COMMITMENTS, CREDIT RISK AND CONTINGENCIES	9 Months Ended
	Sep. 30, 2013
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:


		September 30,		December 31,
		2013		2012
	Commitments to extend credit	$	2,822,545	$	2,600,355
	Standby letters of credit		122,713		130,912
	At September 30, 2013, funding of 78.3% of the commitments to extend credit was dependent on the financial condition of the customer. The Corporation has the ability to withdraw such commitments at its discretion. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Based on management’s credit evaluation of the customer, collateral may be deemed necessary. Collateral requirements vary and may include accounts receivable, inventory, property, plant and equipment and income-producing commercial properties.
	Standby letters of credit are conditional commitments issued by the Corporation that may require payment at a future date. The credit risk involved in issuing letters of credit is quantified on a quarterly basis, through the review of historical performance of the Corporation’s portfolios and allocated as a liability on the Corporation’s balance sheet.
	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.
	Annapolis Bancorp, Inc. Stockholder Litigation
	On November 8, 2012, a purported stockholder of ANNB filed a derivative complaint on behalf of ANNB in the Circuit Court for Anne Arundel County, Maryland, captioned Andera v. Lerner, et al., Case no. 02C12173766, and naming as defendants ANNB, its board of directors and the Corporation. The lawsuit makes various allegations against the defendants, including that the merger consideration is inadequate and undervalues the company, that the director defendants breached their fiduciary duties to ANNB in approving the merger, and that the Corporation aided and abetted those alleged breaches. The lawsuit generally seeks an injunction barring the defendants from consummating the merger. In addition, the lawsuit seeks rescission of the merger agreement to the extent already implemented or, in the alternative, award of rescissory damages, an accounting to plaintiff for all damages caused by the defendants and for all profits and special benefits obtained as a result of the defendants’ alleged breaches of fiduciary duties, and an award of the costs and expenses incurred in the action, including a reasonable allowance for counsel fees and expert fees.
	On February 7, 2013, the plaintiff filed an amended complaint with additional allegations regarding certain purported non-disclosures relating to the proxy statement/prospectus for the pending merger filed with the SEC on January 23, 2013. On February 22, 2013, solely to avoid the costs, risks and uncertainties inherent in litigation, ANNB, the ANNB board of directors, the Corporation and the plaintiff reached an agreement in principle to settle the action, and expect to memorialize that agreement in a written agreement. As part of this agreement in principle, the Corporation and ANNB agreed to disclose additional information in the proxy statement/prospectus filed on February 25, 2013. No substantive term of the merger agreement was modified as part of this settlement. The settlement agreement will be subject to court approval. Plaintiff filed a Motion for Preliminary Approval of Class Action Settlement on July 3, 2013.
	BCSB Bancorp, Inc., Stockholder Litigation
	On June 21, 2013, a purported stockholder of BCSB filed a derivative complaint on behalf of BCSB in the Circuit Court for Baltimore City, Maryland, captioned Darr v. Bouffard, et al, at Case No. 24-C-13-004131, and naming as defendants, BCSB, its board of directors and the Corporation. The lawsuit made various allegations against the defendants, including that the merger consideration is inadequate and undervalues the company, that the director defendants breached their fiduciary duties to BCSB in approving the merger and that the Corporation aided and abetted those alleged breaches. The lawsuit generally sought an injunction barring the defendants from consummating the merger transaction. Alternatively, if the companies completed the transaction before the court entered judgment, the lawsuit sought rescission of the merger or, in the alternative, rescissory damages, an accounting for all resulting damages and for all profits and any special benefits defendants obtained as a result of the alleged breaches of fiduciary duty, and an award for the costs and expenses incurred in the lawsuit, including attorneys’ fees and costs. The plaintiff filed a notice to voluntarily dismiss the complaint on September 6, 2013.
	PVF Capital Corp. Stockholder Litigation
	On July 24, 2013, a purported shareholder of PVF filed a putative class action complaint in the U.S. District Court for the Northern District of Ohio, captioned Kugelman v. PVF Capital Corp., et al., Case No. 1:13-cv-01606, and naming as defendants PVF, its board of directors and the Corporation. The plaintiff alleged that the disclosures in PVF’s proxy statement were inadequate, and that the director defendants breached their fiduciary duties to PVF by approving the proposed merger and by their involvement in preparing the proxy statement. The plaintiff sought an injunction barring the defendants from completing the merger; rescission of the merger agreement to the extent already implemented or, in the alternative, an award of rescissory damages; an accounting to plaintiff for all damages caused by the defendants; and an award of the costs and expenses incurred by the plaintiff in the lawsuit, including a reasonable allowance for counsel fees and expert fees.

	On August 5, 2013, the Corporation, PVF and PVF’s board of directors filed motions to dismiss the plaintiff’s claims in their entirety. On September 9, 2013, the court granted the motions to dismiss and entered judgment in favor of the Corporation, PVF and PVF’s board of directors.

STOCK_INCENTIVE_PLANS

STOCK INCENTIVE PLANS	9 Months Ended
STOCK INCENTIVE PLANS	Sep. 30, 2013
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 nine months ended September 30, 2013 and 2012, the Corporation issued 344,479 and 275,674 restricted stock awards with aggregate weighted average grant date fair values of $3,802 and $3,384, respectively, under these Plans. As of September 30, 2013, the Corporation had available up to 2,734,087 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 $3,338 and $2,634 for the nine months ended September 30, 2013 and 2012, the tax benefit of which was $1,186 and $922, respectively.
	The following table summarizes certain information concerning restricted stock awards:


		Nine Months Ended September 30,
		2013					2012
		Awards			Weighted		Awards			Weighted
					Average					Average
					Grant					Grant
					Price					Price
	Unvested awards outstanding at beginning of period		1,913,073		$	9.17		1,846,115		$	8.44
	Granted		344,479			11.04		275,674			12.28
	Net adjustment due to performance		73,835			10.6		28,181			8.31
	Vested		(734,129	)		7.6		(168,361	)		8.06
	Forfeited		(37,175	)		10.4		(166,018	)		8.53
	Dividend reinvestment		43,934			11.66		55,349			11.38

	Unvested awards outstanding at end of period		1,604,017			10.26		1,870,940			9.12

	The total fair value of awards vested was $8,259 and $2,068 for the nine months ended September 30, 2013 and 2012, respectively.

	As of September 30, 2013, there was $5,786 of unrecognized compensation cost related to unvested restricted stock awards, including $90 that is subject to accelerated vesting under the Plan’s immediate vesting upon retirement provision for awards granted prior to the adoption of ASC 718, Compensation – Stock Compensation. The components of the restricted stock awards as of September 30, 2013 are as follows:


		Service-			Performance-		Total
		Based			Based
		Awards			Awards
	Unvested awards		425,378			1,178,639		1,604,017
	Unrecognized compensation expense	$	1,980		$	3,806	$	5,786
	Intrinsic value	$	5,160		$	14,297	$	19,457
	Weighted average remaining life (in years)		2.24			2.35		2.32
	Stock Options
	The Corporation did not grant stock options during the nine months ended September 30, 2013 or 2012. 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 36,647 and 174,565 for the nine months ended September 30, 2013 and 2012, respectively.
	The following table summarizes certain information concerning stock option awards:


		Nine Months Ended September 30,
		2013					2012
		Shares			Weighted		Shares			Weighted
					Average					Average
					Exercise					Exercise
					Price					Price
	Options outstanding at beginning of period		640,050		$	13.21		586,020		$	14.93
	Assumed from acquisition		19,223			7.92		627,808			10.41
	Exercised		(36,647	)		8.9		(174,565	)		8.8
	Forfeited		(298,150	)		15.1		(329,477	)		13.74

	Options outstanding and exercisable at end of period		324,476			11.65		709,786			12.99

	The intrinsic value of outstanding and exercisable stock options at September 30, 2013 was $217.
	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 acquisition, 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_AND_OTHER_POSTRETIR

RETIREMENT AND OTHER POSTRETIREMENT BENEFIT PLANS	9 Months Ended
RETIREMENT AND OTHER POSTRETIREMENT BENEFIT PLANS	Sep. 30, 2013
Compensation And Retirement Disclosure [Abstract]	'
RETIREMENT AND OTHER POSTRETIREMENT BENEFIT PLANS	'
	RETIREMENT AND OTHER POSTRETIREMENT BENEFIT 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						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Service cost	$	15		$	13		$	51		$	47
	Interest cost		1,437			1,545			4,291			4,627
	Expected return on plan assets		(2,271	)		(2,034	)		(6,811	)		(5,902	)
	Amortization:
	Unrecognized net transition asset		(24	)		(24	)		(70	)		(70	)
	Unrecognized prior service cost (credit)		2			2			6			6
	Unrecognized loss		575			484			1,689			1,378

	Net periodic pension benefit cost	$	(266	)	$	(14	)	$	(844	)	$	86

	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 $6,975 and $6,664 for the nine months ended September 30, 2013 and 2012, 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.
	The Corporation sponsors a postretirement medical and life insurance plan for a closed group of retirees who are currently receiving medical benefits and are eligible for retiree life insurance benefits. The Corporation has no plan assets attributable to this plan and funds the benefits as claims arise. Benefit costs are primarily related to interest cost obligations due to the passage of time. The Corporation reserves the right to terminate the plan or make plan changes at any time.

	The net periodic postretirement benefit cost includes the following components:


		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Interest cost	$	8		$	9		$	24		$	33
	Amortization of unrecognized loss		2			(3	)		2			3

	Net periodic postretirement benefit cost	$	10		$	6		$	26		$	36

INCOME_TAXES

INCOME TAXES	9 Months Ended
INCOME TAXES	Sep. 30, 2013
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 September 30, 2013, 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 September 30, 2013, based on the level of historical taxable income and taxes paid in available carry-back periods.

COMPREHENSIVE_INCOME

COMPREHENSIVE INCOME	9 Months Ended
COMPREHENSIVE INCOME	Sep. 30, 2013
Equity [Abstract]	'
COMPREHENSIVE INCOME	'
	COMPREHENSIVE INCOME
	The components of comprehensive income, net of related tax, are as follows:


			Three Months Ended						Nine Months Ended
			September 30,						September 30,
			2013			2012			2013			2012
	Net income		$	31,634		$	30,743		$	89,365		$	81,455
	Other comprehensive income (loss):
	Unrealized gains (losses) on securities:
	Arising during the period, net of tax (benefit) expense of $(2,635), $1,061, $(8,835) and $3,112			(4,894	)		1,970			(16,408	)		5,779
	Less: reclassification adjustment for (losses) gains included in net income, net of tax (benefit) expense of $2, $(65), $260 and $247			(3	)		120			(483	)		(459	)
	Unrealized gains (losses) on derivative instruments, net of tax expense (benefit) of $239 and $(2,215)			443			—			(4,113	)		—
	Unrealized gains associated with pension and postretirement benefits, net of tax expense of $194, $161, $569 and $461			360			299			1,057			856

	Other comprehensive income (loss)			(4,094	)		2,389			(19,947	)		6,176

	Comprehensive income		$	27,540		$	33,132		$	69,418		$	87,631


	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
	Nine Months Ended September 30, 2013
	Balance at beginning of period		$	9,269		$	(8,039	)	$	(171	)	$	(47,283	)	$	(46,224	)
	Other comprehensive income (loss) before reclassifications			(17,914	)		1,506			(4,113	)		1,057			(19,464	)
	Amounts reclassified from accumulated other comprehensive income			(483	)		—			—			—			(483	)

	Net current period other comprehensive income (loss)			(18,397	)		1,506			(4,113	)		1,057			(19,947	)

	Balance at end of period		$	(9,128	)	$	(6,533	)	$	(4,284	)	$	(46,226	)	$	(66,171	)

	The following table presents a summary of the reclassifications out of accumulated other comprehensive income:
	Nine Months Ended September 30, 2013


	Details About Accumulated Other Comprehensive Income Component		Amount			Affected Line Item
			Reclassified from			in the Statement
			Other			where Net Income
			Comprehensive			is Presented
			Income
	Unrealized net gains on securities available for sale (1)		$	(743	)	Net securities gains
				(260	)	Tax expense

			$	(483	)


	-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_SHARE

EARNINGS PER SHARE	9 Months Ended
EARNINGS PER SHARE	Sep. 30, 2013
Earnings Per Share [Abstract]	'
EARNINGS PER SHARE	'
	EARNINGS PER SHARE
	Basic earnings per share is calculated by dividing net income by the weighted average number of shares of common stock outstanding net of unvested shares of restricted stock.
	Diluted earnings per share is calculated by dividing net income adjusted for interest expense on convertible debt 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, restricted shares and convertible debt, 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 share:


		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2013		2012		2013		2012
	Net income	$	31,634	$	30,743	$	89,365	$	81,455


	Basic weighted average common shares outstanding		144,759,887		139,228,812		142,949,134		139,074,244
	Net effect of dilutive stock options, warrants, restricted stock and convertible debt		1,686,555		1,535,240		1,520,683		1,474,334

	Diluted weighted average common shares outstanding		146,446,442		140,764,052		144,469,817		140,548,578


	Basic earnings per share	$	0.22	$	0.22	$	0.63	$	0.59

	Diluted earnings per share	$	0.22	$	0.22	$	0.62	$	0.58

	For the three months ended September 30, 2013 and 2012, 17,081 and 168,227 shares of common stock, respectively, related to stock options and warrants were excluded from the computation of diluted earnings per share because the exercise price of the shares was greater than the average market price of the common shares and therefore, the effect would be anti-dilutive. For the nine months ended September 30, 2013 and 2012, 41,779 and 156,983 shares of common stock, respectively, related to stock options and warrants were excluded from the computation of diluted earnings per 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	9 Months Ended
CASH FLOW INFORMATION	Sep. 30, 2013
Supplemental Cash Flow Elements [Abstract]	'
CASH FLOW INFORMATION	'
	CASH FLOW INFORMATION
	Following is a summary of supplemental cash flow information:


	Nine Months Ended September 30	2013		2012
	Interest paid on deposits and other borrowings	$	36,340	$	42,227
	Income taxes paid		18,700		7,250
	Transfers of loans to other real estate owned		10,856		12,086
	Financing of other real estate owned sold		549		701

BUSINESS_SEGMENTS

BUSINESS SEGMENTS	9 Months Ended
BUSINESS SEGMENTS	Sep. 30, 2013
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 and			Consolidated
			Banking		Management		Insurance		Finance		Other			Consolidated
	At or for the Three Months Ended September 30, 2013
	Interest income		$	98,716	$	—	$	27	$	9,600	$	1,447		$	109,790
	Interest expense			7,552		—		—		839		2,145			10,536
	Net interest income			91,164		—		27		8,761		(698	)		99,254
	Provision for loan losses			5,432		—		—		1,725		123			7,280
	Non-interest income			24,365		6,916		3,222		681		(2,326	)		32,858
	Non-interest expense			68,091		5,850		2,799		4,724		(358	)		81,106
	Intangible amortization			1,938		76		101		—		—			2,115
	Income tax expense (benefit)			9,552		366		128		1,145		(1,214	)		9,977
	Net income (loss)			30,516		624		221		1,848		(1,575	)		31,634
	Total assets			12,610,043		19,614		19,788		182,695		(41,861	)		12,790,279
	Total intangibles			725,389		11,084		10,627		1,809		—			748,909

	At or for the Three Months Ended September 30, 2012
	Interest income		$	97,364	$	—	$	27	$	8,860	$	1,505		$	107,756
	Interest expense			10,912		—		—		869		2,444			14,225
	Net interest income			86,452		—		27		7,991		(939	)		93,531
	Provision for loan losses			6,826		—		—		1,421		182			8,429
	Non-interest income			25,048		6,006		3,602		590		(433	)		34,813
	Non-interest expense			61,820		4,844		2,947		4,829		400			74,840
	Intangible amortization			2,056		80		106		—		—			2,242
	Income tax expense (benefit)			11,456		396		204		888		(854	)		12,090
	Net income (loss)			29,342		686		372		1,443		(1,100	)		30,743
	Total assets			11,803,432		19,075		19,281		170,304		(27,201	)		11,984,891
	Total intangibles			693,029		11,392		11,033		1,809		—			717,263

	At or for the Nine Months Ended September 30, 2013
	Interest income		$	289,984	$	—	$	82	$	27,920	$	4,763		$	322,749
	Interest expense			24,449		—		—		2,533		6,671			33,653
	Net interest income			265,535		—		82		25,387		(1,908	)		289,096
	Provision for loan losses			17,283		—		—		4,930		511			22,724
	Non-interest income			74,118		21,294		10,024		2,029		(4,183	)		103,282
	Non-interest expense			198,395		18,338		8,420		14,063		823			240,039
	Intangible amortization			5,694		228		304		—		—			6,226
	Income tax expense (benefit)			32,486		1,009		497		3,234		(3,202	)		34,024
	Net income (loss)			85,795		1,719		885		5,189		(4,223	)		89,365
	Total assets			12,610,043		19,614		19,788		182,695		(41,861	)		12,790,279
	Total intangibles			725,389		11,084		10,627		1,809		—			748,909
	At or for the Nine Months Ended September 30, 2012
	Interest income		$	293,756	$	4	$	85	$	25,888	$	4,595		$	324,328
	Interest expense			35,130		—		—		2,736		7,529			45,395
	Net interest income			258,626		4		85		23,152		(2,934	)		278,933
	Provision for loan losses			17,215		—		—		4,218		595			22,028
	Non-interest income			72,904		17,889		10,072		1,674		(3,203	)		99,336
	Non-interest expense			196,510		14,587		8,658		14,016		1,574			235,345
	Intangible amortization			6,334		240		318		—		—			6,892
	Income tax expense (benefit)			31,882		1,117		420		2,530		(3,400	)		32,549
Net income (loss)			79,589		1,949		761		4,062		(4,906	)		81,455
Total assets			11,803,432		19,075		19,281		170,304		(27,201	)		11,984,891
Total intangibles			693,029		11,392		11,033		1,809		—			717,263

FAIR_VALUE_MEASUREMENTS

FAIR VALUE MEASUREMENTS	9 Months Ended
FAIR VALUE MEASUREMENTS	Sep. 30, 2013
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		Definition
	Level 1		valuation is based upon unadjusted quoted market prices for identical instruments traded in active markets.

	Level 2		valuation is based upon quoted market prices for similar instruments traded in active markets, quoted market prices for identical or similar instruments traded in markets that are not active and model-based valuation techniques for which all significant assumptions are observable in the market or can be corroborated by market data.

	Level 3		valuation is derived from other valuation methodologies including discounted cash flow models and similar techniques that use significant assumptions not observable in the market. These unobservable assumptions reflect estimates of assumptions that market participants would use in determining fair value.

	A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement.
	Following is a description of the valuation methodologies the Corporation uses for financial instruments recorded at fair value on either a recurring or non-recurring basis:
	Securities Available For Sale
	Securities available for sale consists of both debt and equity securities. These securities are recorded at fair value on a recurring basis. At September 30, 2013, 97% 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 3% 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.
	The Corporation determines the valuation of its investments in pooled TPS with the assistance of a third-party independent financial consulting firm that specializes in advisory services related to illiquid financial investments. The consulting firm provides the Corporation appropriate valuation methodology, performance assumptions, modeling techniques, discounted cash flows, discount rates using the underlying index plus 4.5-14%, and sensitivity analyses with respect to levels of defaults and deferrals necessary to produce losses.
	Additionally, the Corporation utilizes the firm’s expertise to reassess assumptions to reflect actual conditions. See the Securities footnote in the Notes to Consolidated Financial Statements section of this Report for information on how the Corporation reassesses assumptions to determine the valuation of its pooled TPS. Accessing the services of a financial consulting firm with a focus on financial instruments assists the Corporation in accurately valuing these complex financial instruments and facilitates informed decision-making with respect to such instruments.
	The Level 3 CDOs could be subject to sensitivities in market risks that may cause the discount rates on these instruments to vary from those currently utilized to determine fair value. These discount rates vary today, but typically range between 4.5-14% over the coupon rate of the specific security. The valuations are somewhat sensitive to changes in the discount rate. For example, each 1% change in the discount rate will alter the fair value of these debt obligations by approximately $3,000 or 7% of the total book value. Factors that could influence the discount rate include: the overall health of the economy, the current and projected health of the banking system and its impact upon banks’ capital strategies, access to capital markets for the underlying debt issuers and regulatory matters. Generally, in an improving economy the health of the banking system should be improving and capital market access would be open, thus reducing market risk premiums and therefore discount rates for these instruments. Conversely, the opposite is true, a weakening economy puts pressure on the banking system and the financial health of banks. The Corporation takes all these factors into consideration when establishing a fair value for these Level 3 obligations.
	Derivative Financial Instruments
	The Corporation determines its fair value for derivatives using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects contractual terms of the derivative, including the period to maturity and uses observable market based inputs, including interest rate curves and implied volatilities.

	The Corporation incorporates credit valuation adjustments to appropriately reflect both its own non-performance risk and the respective counterparty’s non-performance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of non-performance risk, the Corporation considers the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts and guarantees.
	Although the Corporation has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by itself and its counterparties. However, as of September 30, 2013, 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
	September 30, 2013
	Assets measured at fair value
	Available for sale debt securities
	U.S. government-sponsored entities		$	—		$	332,152		$	—		$	332,152
	Residential mortgage-backed securities
	Agency mortgage-backed securities			—			227,638			—			227,638
	Agency collateralized mortgage obligations			—			489,047			—			489,047
	Non-agency collateralized mortgage obligations			—			19			1,827			1,846
	States of the U.S. and political subdivisions			—			17,875			—			17,875
	Collateralized debt obligations			—			—			28,704			28,704
	Other debt securities			—			16,128			—			16,128

				—			1,082,859			30,531			1,113,390

	Available for sale equity securities
	Financial services industry			686			1,020			398			2,104
	Insurance services industry			64			—			—			64

				750			1,020			398			2,168

				750			1,083,879			30,929			1,115,558
Derivative financial instruments
Trading			—			37,655			—			37,655
Not for trading			—			387			—			387

			—			38,042			—			38,042

		$	750		$	1,121,921		$	30,929		$	1,153,600


Liabilities measured at fair value
Derivative financial instruments
Trading			—		$	37,495			—		$	37,495
Not for trading			—			6,977			—			6,977

			—		$	44,472			—		$	44,472

December 31, 2012
Assets measured at fair value
Available for sale debt securities
U.S. government-sponsored entities		$	—		$	354,457		$	—		$	354,457
Residential mortgage-backed securities
Agency mortgage-backed securities			—			275,150			—			275,150
Agency collateralized mortgage obligations			—			469,547			—			469,547
Non-agency collateralized mortgage obligations			—			24			2,705			2,729
States of the U.S. and political subdivisions			—			24,824			—			24,824
Collateralized debt obligations			—			—			22,456			22,456
Other debt securities			—			14,621			6,892			21,513

			—			1,138,623			32,053			1,170,676

Available for sale equity securities
Financial services industry			351			1,099			512			1,962
Insurance services industry			45			—			—			45

			396			1,099			512			2,007

			396			1,139,722			32,565			1,172,683
Derivative financial instruments
Trading			—			58,008			—			58,008
Not for trading			—			—			—			—

			—			58,008			—			58,008

		$	396		$	1,197,730		$	32,565		$	1,230,691


Liabilities measured at fair value
Derivative financial instruments
Trading			—		$	58,150			—		$	58,150
Not for trading			—			—			—			—

			—		$	58,150			—		$	58,150

During 2013, the Corporation transferred out of Level 2 and Level 3 equity securities that now trade on NASDAQ. At September 30, 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. There were no transfers of assets or liabilities between the hierarchy levels for the nine months ended September 30, 2012.

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
Nine Months Ended September 30, 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			4,561			21			6			(21	)		4,567
Accretion included in earnings			2,311			4			—			11			2,326
Purchases, issuances, sales and settlements:
Purchases			—			—			—			—			—
Issuances			29			—			—			—			29
Sales/redemptions			—			(1,033	)		—			—			(1,033	)
Settlements			(653	)		—			—			(868	)		(1,521	)
Transfers from Level 3			—			(5,962	)		(120	)		—			(6,082	)
Transfers into Level 3			—			—			—			—			—

Balance at end of period		$	28,704		$	—		$	398		$	1,827		$	30,929


Year Ended December 31, 2012
Balance at beginning of period		$	5,998		$	5,197		$	408		$	—		$	11,603
Total gains (losses) – realized/unrealized:
Included in earnings			—			—			—			—			—
Included in other comprehensive income			917			732			104			49			1,802
Accretion included in earnings			2,515			9			—			20			2,544
Purchases, issuances, sales and settlements:
Purchases			16,569			954			—			4,230			21,753
Issuances			46			—			—			—			46
Sales/redemptions			(2,542	)		—			—			—			(2,542	)
Settlements			(1,047	)		—			—			(1,594	)		(2,641	)
Transfers from Level 3			—			—			—			—			—
Transfers into Level 3			—			—			—			—			—

Balance at end of period		$	22,456		$	6,892		$	512		$	2,705		$	32,565

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 nine months ended September 30, 2013 and 2012, 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.

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 lower of cost or fair value accounting or write-downs of individual assets. Valuation methodologies used to measure these fair value adjustments were previously described. For assets measured at fair value on a non-recurring basis still held at the balance sheet date, the following table provides the hierarchy level and the fair value of the related assets or portfolios:


		Level 1			Level 2			Level 3			Total
September 30, 2013
Impaired loans			—		$	3,880		$	9,242		$	13,122
Other real estate owned			—			4,751			4,634			9,385

December 31, 2012
Impaired loans			—		$	14,325		$	3,171		$	17,496
Other real estate owned			—			5,771			13,540			19,311
Investment security, held-to-maturity:
Non-agency CMO			—			—			3,636			3,636
Impaired loans measured or re-measured at fair value on a non-recurring basis during the nine months ended September 30, 2013 had a carrying amount of $14,424 and an allocated allowance for loan losses of $2,906 at September 30, 2013. The allocated allowance is based on fair value of $13,122 less estimated costs to sell of $1,604. The allowance for loan losses includes a provision applicable to the current period fair value measurements of $771, which was included in the provision for loan losses for the nine months ended September 30, 2013.
OREO with a carrying amount of $10,738 was written down to $8,245 (fair value of $9,385 less estimated costs to sell of $1,140), resulting in a loss of $2,493, which was included in earnings for the nine months ended September 30, 2013.
The investment security held-to-maturity as of December 31, 2012 represented a non-agency CMO where OTTI had been identified and the investment had been adjusted to fair value. This security was sold during the first quarter of 2013.
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 September 30, 2013, 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:


								Fair Value Measurements
		Carrying			Fair			Level 1			Level 2			Level 3
		Amount			Value			Level 1			Level 2			Level 3
September 30, 2013
Financial Assets
Cash and cash equivalents		$	283,509		$	283,509		$	283,509		$	—		$	—
Securities available for sale			1,115,558			1,115,558			750			1,083,879			30,929
Securities held to maturity			1,180,992			1,181,652			—			1,174,282			7,370
Net loans, including loans held for sale			8,734,958			8,597,123			—			—			8,597,123
Bank owned life insurance			263,781			268,641			268,641			—			—
Derivative assets			38,042			38,042			—			38,042			—
Accrued interest receivable			33,025			33,025			33,025			—			—

Financial Liabilities
Deposits			9,723,371			9,736,492			7,375,322			2,361,170			—
Short-term borrowings			1,166,180			1,166,180			1,166,180			—			—
Long-term debt			91,807			94,670			—			—			94,670
Junior subordinated debt			194,213			190,150			—			—			190,150
Derivative liabilities			44,472			44,472			—			44,472			—
Accrued interest payable			6,368			6,368			6,368			—			—

December 31, 2012
Financial Assets
Cash and cash equivalents		$	239,044		$	239,044		$	239,044		$	—		$	—
Securities available for sale			1,172,683			1,172,683			396			1,139,722			32,565
Securities held to maturity			1,106,563			1,143,213			—			1,128,524			14,689
Net loans, including loans held for sale			8,061,096			7,996,554			—			—			7,966,554
Bank owned life insurance			246,088			257,060			257,060			—			—
Derivative assets			58,008			58,008			—			58,008			—
Accrued interest receivable			30,210			30,210			30,210			—			—

Financial Liabilities
Deposits			9,082,174			9,117,757			6,546,316			2,571,441			—
Short-term borrowings			1,083,138			1,083,138			1,083,138			—			—
Long-term debt			89,425			92,329			—			—			92,329
Junior subordinated debt			204,019			172,246			—			—			172,246
Derivative liabilities			58,150			58,150			—			58,150			—
Accrued interest payable			9,054			9,054			9,054			—			—

NEW_ACCOUNTING_STANDARDS_Polic

NEW ACCOUNTING STANDARDS (Policies)	9 Months Ended
NEW ACCOUNTING STANDARDS (Policies)	Sep. 30, 2013
Accounting Changes And Error Corrections [Abstract]	'
Income Taxes	'
	Income Taxes
	In July 2013, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (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 is not expected to have a material effect on the financial statements, results of operations or liquidity of the Corporation.
Derivatives and Hedging	'
	Derivatives and Hedging
	In July 2013, the FASB issued ASU No. 2013-10, Inclusion of the Fed Funds Effective Swap Rate (or Overnight Index Swap Rate) as a Benchmark Interest Rate for Hedge Accounting Purposes, which establishes the Fed Funds Effective Swap Rate as an acceptable U.S. benchmark interest rate, in addition to the UST and LIBOR swap rates, to provide risk managers with a more comprehensive spectrum of interest rate resets to utilize as the designated benchmark interest rate risk component under the hedge accounting guidance. The requirements of ASU 2013-10 are effective prospectively for qualifying new or redesignated hedging relationships entered into on or after July 17, 2013. The adoption of this update did not have a material effect on the financial statements, results of operations or liquidity of the Corporation.
Comprehensive Income	'
	Comprehensive Income
	In February 2013, the FASB issued ASU No. 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income, that requires an entity to report the effects of significant reclassifications out of each component of accumulated other comprehensive income on the respective line item in net income if the amount being reclassified is required under GAAP to be reclassified to net income in its entirety in the same reporting period. For amounts not required to be reclassified in their entirety in the same reporting period, an entity shall add a cross reference to the related footnote where additional information about the effect of the reclassification is disclosed. The requirements of ASU 2013-02 were effective prospectively for reporting periods beginning after December 15, 2012. The adoption of this update did not have a material effect on the financial statements, results of operations or liquidity of the Corporation.
Disclosures about Offsetting Assets and Liabilities	'
	Disclosures about Offsetting Assets and Liabilities
	In January 2013, the FASB issued ASU No. 2013-01, Scope Clarification of Disclosures about Offsetting Assets and Liabilities, that clarifies the scope of its previously issued guidance, limiting the disclosure requirements to derivative instruments, repurchase agreements and reverse repurchase agreements and securities borrowing and lending transactions to the extent that they are offset in the financial statements or subject to an enforceable master netting arrangement or similar agreement. The requirements of ASU 2013-01 are effective on January 1, 2013. 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)	9 Months Ended
SECURITIES (Tables)	Sep. 30, 2013
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:
	September 30, 2013
	U.S. government-sponsored entities		$	336,126			$	412			$	(4,386	)		$	332,152
	Residential mortgage-backed securities:
	Agency mortgage-backed securities			223,125				4,641				(128	)			227,638
	Agency collateralized mortgage obligations			506,672				405				(18,030	)			489,047
	Non-agency collateralized mortgage obligations			1,818				28				—				1,846
	States of the U.S. and political subdivisions			17,472				542				(139	)			17,875
	Collateralized debt obligations			36,451				2,452				(10,199	)			28,704
	Other debt securities			16,478				564				(914	)			16,128

	Total debt securities			1,138,142				9,044				(33,796	)			1,113,390
	Equity securities			1,554				645				(31	)			2,168

			$	1,139,696			$	9,689			$	(33,827	)		$	1,115,558

	December 31, 2012
	U.S. government-sponsored entities		$	352,910			$	1,676			$	(129	)		$	354,457
	Residential mortgage-backed securities:
	Agency mortgage-backed securities			267,575				7,575				—				275,150
	Agency collateralized mortgage obligations			465,574				4,201				(228	)			469,547
	Non-agency collateralized mortgage obligations			2,679				50				—				2,729
	States of the U.S. and political subdivisions			23,592				1,232				—				24,824
	Collateralized debt obligations			34,765				967				(13,276	)			22,456
	Other debt securities			21,790				695				(972	)			21,513

	Total debt securities			1,168,885				16,396				(14,605	)			1,170,676
	Equity securities			1,554				462				(9	)			2,007

			$	1,170,439			$	16,858			$	(14,614	)		$	1,172,683

Schedule of Amortized Cost and Fair Value of Securities Held to Maturity	'
	The amortized cost and fair value of securities are as follows:
	Securities Held to Maturity:
	September 30, 2013
	U.S. Treasury		$	503			$	122			$	—			$	625
	U.S. government-sponsored entities			43,403				191				(1,019	)			42,575
	Residential mortgage-backed securities:
	Agency mortgage-backed securities			650,732				14,679				(2,414	)			662,997
	Agency collateralized mortgage obligations			341,743				759				(12,788	)			329,714
	Non-agency collateralized mortgage obligations			7,317				53				—				7,370
	Commercial mortgage-backed securities			2,247				134				(31	)			2,350
	States of the U.S. and political subdivisions			135,047				2,641				(1,667	)			136,021

			$	1,180,992			$	18,579			$	(17,919	)		$	1,181,652


	December 31, 2012
	U.S. Treasury		$	503			$	188			$	—			$	691
	U.S. government-sponsored entities			28,731				280				(99	)			28,912
	Residential mortgage-backed securities:
	Agency mortgage-backed securities			780,022				28,783				(1	)			808,804
	Agency collateralized mortgage obligations			133,976				1,266				—				135,242
	Non-agency collateralized mortgage obligations			14,082				130				—				14,212
	Commercial mortgage-backed securities			1,024				39				—				1,063
	States of the U.S. and political subdivisions			147,713				6,099				—				153,812
	Collateralized debt obligations			512				—				(35	)			477

			$	1,106,563			$	36,785			$	(135	)		$	1,143,213


Gross Gains and Gross Losses Realized on Sales of Securities	'
	Gross gains and gross losses were realized on securities as follows:


			Three Months Ended								Nine Months Ended
			September 30,								September 30,
			2013				2012				2013				2012
	Gross gains		$	5			$	355			$	1,120			$	1,151
	Gross losses			—				(421	)			(363	)			(849	)

			$	5			$	(66	)		$	757			$	302

Amortized Cost and Fair Value of Securities, by Contractual Maturities	'
	As of September 30, 2013, 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		$	—			$	—			$	2,461			$	2,483
	Due from one to five years			209,474				209,523				34,366				34,162
	Due from five to ten years			150,871				147,783				65,749				66,086
	Due after ten years			46,182				37,553				76,377				76,490

				406,527				394,859				178,953				179,221
	Residential mortgage-backed securities:
	Agency mortgage-backed securities			223,125				227,638				650,732				662,997
	Agency collateralized mortgage obligations			506,672				489,047				341,743				329,714
	Non-agency collateralized mortgage obligations			1,818				1,846				7,317				7,370
	Commercial mortgage-backed securities			—				—				2,247				2,350
	Equity securities			1,554				2,168				—				—

			$	1,139,696			$	1,115,558			$	1,180,992			$	1,181,652

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:
	September 30, 2013
	U.S. government-sponsored entities			12			$	173,836			$	(4,386	)			—			$	—		$	—			12	$	173,836	$	(4,386	)
	Residential mortgage-backed securities:
	Agency mortgage-backed securities			3				31,737				(128	)			—				—			—			3		31,737		(128	)
	Agency collateralized mortgage obligations			28				416,085				(18,030	)			—				—			—			28		416,085		(18,030	)
	States of the U.S. and political subdivisions			2				3,134				(139	)			—				—			—			2		3,134		(139	)
	Collateralized debt obligations			1				2,195				(3	)			9				8,927			(10,196	)		10		11,122		(10,199	)
	Other debt securities			—				—				—				4				5,963			(914	)		4		5,963		(914	)
	Equity securities			—				—				—				1				632			(31	)		1		632		(31	)

				46			$	626,987			$	(22,686	)			14			$	15,522		$	(11,141	)		60	$	642,509	$	(33,827	)


	December 31, 2012
	U.S. government-sponsored entities			3			$	44,868			$	(129	)			—			$	—		$	—			3	$	44,868	$	(129	)
	Residential mortgage-backed securities:
	Agency collateralized mortgage obligations			3				47,174				(228	)			—				—			—			3		47,174		(228	)
	Collateralized debt obligations			7				8,708				(909	)			9				5,532			(12,367	)		16		14,240		(13,276	)
	Other debt securities			—				—				—				4				5,899			(972	)		4		5,899		(972	)
	Equity securities			1				654				(9	)			—				—			—			1		654		(9	)

				14			$	101,404			$	(1,275	)			13			$	11,431		$	(13,339	)		27	$	112,835	$	(14,614	)


	Securities Held to Maturity:
	September 30, 2013
	U.S. government-sponsored entities			3			$	39,027			$	(1,019	)			—				—			—			3	$	39,027	$	(1,019	)
	Residential mortgage-backed securities:
	Agency mortgage-backed securities			18				237,938				(2,414	)			—				—			—			18		237,938		(2,414	)
	Agency collateralized mortgage obligations			19				274,423				(12,788	)			—				—			—			19		274,423		(12,788	)
	Commercial mortgage-backed securities			1				991				(31	)			—				—			—			1		991		(31	)
	States of the U.S. and political subdivisions			25				28,327				(1,667	)			—				—			—			25		28,327		(1,667	)

				66			$	580,706			$	(17,919	)			—				—			—			66	$	580,706	$	(17,919	)


	December 31, 2012
	U.S. government-sponsored entities			1			$	14,901			$	(99	)			—			$	—		$	—			1	$	14,901	$	(99	)
	Residential mortgage-backed securities:
	Agency mortgage-backed securities			1				1,424				(1	)			—				—			—			1		1,424		(1	)
	Collateralized debt obligations			—				—				—				1				477			(35	)		1		477		(35	)

				2			$	16,325			$	(100	)			1			$	477		$	(35	)		3	$	16,802	$	(135	)

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				Total
			Debt				Non-Agency
			Obligations				CMOs
	For the Nine Months Ended September 30, 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

	For the Nine Months Ended September 30, 2012
	Beginning balance		$	18,369			$	29			$	18,398
	Loss where impairment was not previously recognized			119				—				119
	Additional loss where impairment was previously recognized			—				—				—
	Reduction due to credit impaired securities sold			(1,214	)			(29	)			(1,243	)

	Ending balance		$	17,274			$	—			$	17,274

Trust Preferred Securities	'
	The following table provides information relating to the Corporation’s TPS as of September 30, 2013:


	Deal Name		Class		Current				Amortized				Fair				Unrealized				Lowest	Number of			Actual		Actual		Projected			Expected		Excess
					Par				Cost				Value				Gain (Loss)				Credit	Issuers			Defaults (as		Deferrals (as		Recovery			Defaults (%)		Subordination
					Value																Ratings	Currently			a percent of		a percent of		Rates on			-2		(as a percent
																						Performing			original		original		Current					of current
																									collateral)		collateral)		Deferrals (1)					collateral) (3)
	Pooled TPS:
	P1		C1		$	5,500			$	2,571			$	1,511			$	(1,060	)		C		42			22		7		41			18		0
	P2		C1			4,889				3,073				1,241				(1,832	)		C		41			16		15		41			15		0
	P3		C1			5,561				4,357				1,668				(2,689	)		C		47			13		9		34			16		0
	P4		C1			3,994				3,120				1,197				(1,923	)		C		52			16		6		42			16		0
	P5		B3			2,000				765				364				(401	)		C		14			29		10		48			11		0
	P6		B1			3,028				2,497				1,004				(1,493	)		C		50			15		19		51			10		0
	P7		C			5,048				828				875				47			C		36			14		22		37			14		0
	P8		C			2,011				788				336				(452	)		C		44			16		11		36			17		0.42
	P9		A4L			2,000				645				397				(248	)		C		24			16		13		43			11		0

	Total OTTI					34,031				18,644				8,593				(10,051	)				350			17		12		41			15


	P10		C1			5,220				1,077				1,434				357			C		42			22		7		41			18		0
	P11		A2A			5,000				2,198				2,195				(3	)		B+		41			16		15		41			15		47.85
	P12		C1			4,781				1,317				1,434				117			C		47			13		9		34			16		0
	P13		C1			5,260				1,278				1,576				298			C		52			16		6		42			16		0
	P14		C1			5,190				1,063				1,166				103			C		58			15		12		36			17		0
	P15		C1			3,206				408				639				231			C		43			19		7		28			16		0
	P16		C			3,339				651				673				22			C		36			15		12		28			15		0
	P17		B			2,069				672				673				1			Ca		32			13		21		40			12		18.75
	P18		B2			5,000				2,228				2,905				677			CCC		20			0		8		10			15		37.52
	P19		B			4,070				963				1,340				377			C		44			16		11		36			17		0.52
	P20		A1			3,304				1,983				2,037				54			BB-		46			21		6		35			15		54.24
	P21		B			5,000				1,307				1,209				(98	)		C		15			18		6		49			11		0
	P22		C1			5,531				1,386				1,399				13			C		23			15		12		42			11		0
	P23		C1			5,606				1,276				1,431				155			C		23			16		10		44			11		0

	Total Not OTTI					62,576				17,807				20,111				2,304					522			16		10		36			15

	Total Pooled TPS				$	96,607			$	36,451			$	28,704			$	(7,747	)				872			16		11		38			15

	Single Issuer TPS:
	S1				$	2,000			$	1,954			$	1,600			$	(354	)		BB		1
	S2					2,000				1,924				1,620				(304	)		BBB		1
	S3					2,000				2,000				1,943				(57	)		B+		1
	S4					1,000				999				800				(199	)		BB		1

	Total Single Issuer TPS				$	7,000			$	6,877			$	5,963			$	(914	)				4


	Total TPS				$	103,607			$	43,328			$	34,667			$	(8,661	)				876


	-1	Some current deferrals are expected to cure at rates varying from 10% to 90% after five years.
	-2	Expected future defaults as a percent of remaining performing collateral.
	-3	Excess subordination represents the additional defaults in excess of both current and projected defaults that the CDO can absorb before the bond experiences any credit impairment.

LOANS_AND_ALLOWANCE_FOR_LOAN_L1

LOANS AND ALLOWANCE FOR LOAN LOSSES (Tables)	9 Months Ended
LOANS AND ALLOWANCE FOR LOAN LOSSES (Tables)	Sep. 30, 2013
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
	September 30, 2013
	Commercial real estate		$	2,548,278			$	372,530			$	2,920,808
	Commercial and industrial			1,689,467				65,768				1,755,235
	Commercial leases			141,714				—				141,714

	Total commercial loans and leases			4,379,459				438,298				4,817,757
	Direct installment			1,349,804				58,735				1,408,539
	Residential mortgages			669,978				361,827				1,031,805
	Indirect installment			631,030				7,282				638,312
	Consumer lines of credit			804,453				83,528				887,981
	Other			52,511				—				52,511

			$	7,887,235			$	949,670			$	8,836,905

	December 31, 2012
	Commercial real estate		$	2,448,471			$	258,575			$	2,707,046
	Commercial and industrial			1,555,301				47,013				1,602,314
	Commercial leases			130,133				—				130,133

	Total commercial loans and leases			4,133,905				305,588				4,439,493
	Direct installment			1,108,865				69,665				1,178,530
	Residential mortgages			653,826				438,402				1,092,228
	Indirect installment			568,324				13,713				582,037
	Consumer lines of credit			732,534				72,960				805,494
	Other			39,937				—				39,937

			$	7,237,391			$	900,328			$	8,137,719

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 ASC310-30 (impaired and non-impaired) acquired from ANNB in 2013 and Parkvale in 2012:


			Acquired				Acquired				Total
			Impaired				Performing
			Loans				Loans
	Acquired from ANNB in 2013
	Contractually required cash flows at acquisition		$	12,200			$	270,197			$	282,397
	Non-accretable difference (expected losses and foregone interest)			(7,829	)			(13,705	)			(21,534	)

	Cash flows expected to be collected at acquisition			4,371				256,492				260,863
	Accretable yield			(523	)			(41,207	)			(41,730	)

	Basis in acquired loans at acquisition		$	3,848			$	215,285			$	219,133

	Acquired from Parkvale in 2012
	Contractually required cash flows at acquisition		$	12,224			$	1,327,342			$	1,339,566
	Non-accretable difference (expected losses and foregone interest)			(6,070	)			(214,541	)			(220,611	)

	Cash flows expected to be collected at acquisition			6,154				1,112,801				1,118,955
	Accretable yield			(589	)			(293,594	)			(294,183	)

	Basis in acquired loans at acquisition		$	5,565			$	819,207			$	824,772

Summary of Change in Accretable Yield of Acquired Loans	'
	The following table provides a summary of change in accretable yield for all acquired loans:


			Acquired				Acquired				Total
			Impaired				Performing
			Loans				Loans
	Nine Months Ended September 30, 2013
	Balance at beginning of period		$	778			$	253,375			$	254,153
	Acquisitions			523				41,207				41,730
	Reduction due to unexpected early payoffs			—				(37,432	)			(37,432	)
	Reclass from non-accretable difference			6,318				1,555				7,873
	Disposals/transfers			164				(210	)			(46	)
	Accretion			(2,250	)			(27,629	)			(29,879	)

	Balance at end of period		$	5,533			$	230,866			$	236,399

	Year Ended December 31, 2012
	Balance at beginning of period		$	2,477			$	49,229			$	51,706
	Acquisitions			589				293,594				294,183
	Reduction due to unexpected early payoffs			—				(57,840	)			(57,840	)
	Reclass from non-accretable difference			3,539				10,915				14,454
	Disposals/transfers			(49	)			(615	)			(664	)
	Accretion			(5,778	)			(41,908	)			(47,686	)

	Balance at end of period		$	778			$	253,375			$	254,153

Summary of Purchased Credit-Impaired Loans, Information Identified in Corporation's Acquisition of ANNB and Parkvale	'
	Following is information about PCI loans identified in the Corporation’s acquisition of ANNB:


			At				September 30,
			Acquisition				2013
	Outstanding balance		$	12,220			$	11,867
	Carrying amount			3,848				3,442
	Allowance for loan losses			n/a				—
	Impairment recognized since acquisition			n/a				—
	Allowance reduction recognized since acquisition			n/a				—

	Following is information about PCI loans identified in the Corporation’s acquisition of Parkvale:


			At				December 31,
			Acquisition				2012
	Outstanding balance		$	9,135			$	3,704
	Carrying amount			5,565				2,552
	Allowance for loan losses			n/a				103
	Impairment recognized since acquisition			n/a				103
	Allowance reduction recognized since acquisition			n/a				—
Summary of Information about Corporation's Purchased Credit-Impaired Loans	'
	Following is information about the Corporation’s PCI loans:


			Outstanding				Non-Accretable				Expected				Accretable				Recorded
			Balance				Difference				Cash Flows				Yield				Investment
	For the Nine Months Ended September 30, 2013
	Balance at beginning of period		$	41,134			$	(23,733	)		$	17,401			$	(778	)		$	16,623
	Acquisitions			12,220				(7,849	)			4,371				(523	)			3,848
	Accretion			—				—				—				2,250				2,250
	Payments received			(3,087	)			—				(3,087	)			—				(3,087	)
	Reclass from non-accretable difference			—				6,318				6,318				(6,318	)			—
	Disposals/transfers			(8,442	)			6,193				(2,249	)			(164	)			(2,413	)
	Contractual interest			1,942				(1,942	)			—				—				—

	Balance at end of period		$	43,767			$	(21,013	)		$	22,754			$	(5,533	)		$	17,221

	For the Year Ended December 31, 2012
	Balance at beginning of period		$	51,693			$	(33,377	)		$	18,316			$	(2,477	)		$	15,839
	Acquisitions			9,135				(2,981	)			6,154				(589	)			5,565
	Accretion			—				—				—				5,778				5,778
	Payments received			(9,556	)			—				(9,556	)			—				(9,556	)
	Reclass from non-accretable difference			—				3,539				3,539				(3,539	)			—
	Disposals/transfers			(12,494	)			11,442				(1,052	)			49				(1,003	)
	Contractual interest			2,356				(2,356	)			—				—				—

	Balance at end of period		$	41,134			$	(23,733	)		$	17,401			$	(778	)		$	16,623

Summary of Non-Performing Assets	'
	Following is a summary of non-performing assets:


			September 30,				December 31,
			2013				2012
	Non-accrual loans		$	65,451			$	66,004
	Troubled debt restructurings			17,252				14,876

	Total non-performing loans			82,703				80,880
	Other real estate owned (OREO)			35,144				35,257

	Total non-performing loans and OREO			117,847				116,137
	Non-performing investments			733				2,809

	Total non-performing assets		$	118,580			$	118,946


	Asset quality ratios:
	Non-performing loans as a percent of total loans			0.94	%			0.99	%
	Non-performing loans + OREO as a percent of total loans + OREO			1.33	%			1.42	%
	Non-performing assets as a percent of total assets			0.93	%			0.99	%
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:
	September 30, 2013
	Commercial real estate		$	7,041			$	301			$	47,151			$	54,493			$	2,493,785			$	2,548,278
	Commercial and industrial			4,068				459				8,081				12,608				1,676,859				1,689,467
	Commercial leases			836				—				782				1,618				140,096				141,714

	Total commercial loans and leases			11,945				760				56,014				68,719				4,310,740				4,379,459
	Direct installment			9,952				2,515				4,462				16,929				1,332,875				1,349,804
	Residential mortgages			12,331				1,986				3,694				18,011				651,967				669,978
	Indirect installment			4,815				607				975				6,397				624,633				631,030
	Consumer lines of credit			2,146				1,113				306				3,565				800,888				804,453
	Other			23				37				—				60				52,451				52,511

			$	41,212			$	7,018			$	65,451			$	113,681			$	7,773,554			$	7,887,235


	December 31, 2012
	Commercial real estate		$	5,786			$	533			$	47,895			$	54,214			$	2,394,257			$	2,448,471
	Commercial and industrial			7,310				456				6,017				13,783				1,541,518				1,555,301
	Commercial leases			1,671				—				965				2,636				127,497				130,133

	Total commercial loans and leases			14,767				989				54,877				70,633				4,063,272				4,133,905
	Direct installment			8,834				2,717				3,342				14,893				1,093,972				1,108,865
	Residential mortgages			15,821				2,365				2,891				21,077				632,749				653,826
	Indirect installment			5,114				374				1,039				6,527				561,797				568,324
	Consumer lines of credit			1,633				247				355				2,235				730,299				732,534
	Other			36				15				3,500				3,551				36,386				39,937

			$	46,205			$	6,707			$	66,004			$	118,916			$	7,118,475			$	7,237,391



			30-89				³ 90 Days				Non-Accrual				Total				Current				Discount				Total
			Days				Past Due								Past												Loans
			Past Due				and Still								Due (1)
							Accruing
	Acquired Loans:
	September 30, 2013
	Commercial real estate		$	4,681			$	16,002				—			$	20,683			$	370,373			$	(18,526	)		$	372,530
	Commercial and industrial			3,396				4,500				—				7,896				63,566				(5,694	)			65,768
	Commercial leases			—				—				—				—				—				—				—

	Total commercial loans and leases			8,077				20,502				—				28,579				433,939				(24,220	)			438,298
	Direct installment			1,147				1,023				—				2,170				53,785				2,780				58,735
	Residential mortgages			7,272				19,002				—				26,274				370,609				(35,056	)			361,827
	Indirect installment			246				38				—				284				7,661				(663	)			7,282
	Consumer lines of credit			226				893				—				1,119				87,470				(5,061	)			83,528
	Other			—				—				—				—				—				—				—

			$	16,968			$	41,458				—			$	58,426			$	953,464			$	(62,220	)		$	949,670


	December 31, 2012
	Commercial real estate		$	6,829			$	13,597				—			$	20,426			$	250,116			$	(11,967	)		$	258,575
	Commercial and industrial			1,653				138				—				1,791				47,351				(2,129	)			47,013
	Commercial leases			—				—				—				—				—				—				—

Total commercial loans and leases			8,482				13,735				—				22,217				297,467				(14,096	)			305,588
Direct installment			1,454				947				—				2,401				63,502				3,762				69,665
Residential mortgages			12,137				21,069				—				33,206				439,620				(34,424	)			438,402
Indirect installment			347				56				—				403				14,089				(779	)			13,713
Consumer lines of credit			379				778				—				1,157				75,800				(3,997	)			72,960
Other			—				—				—				—				—				—				—

		$	22,799			$	36,585				—			$	59,384			$	890,478			$	(49,534	)		$	900,328


-1	Past due information for loans acquired is based on the contractual balance outstanding at September 30, 2013 and December 31, 2012.
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
			Pass				Mention				Substandard				Doubtful				Total
	Originated Loans:
	September 30, 2013
	Commercial real estate		$	2,388,404			$	46,750			$	110,342			$	2,782			$	2,548,278
	Commercial and industrial			1,550,195				80,987				57,966				319				1,689,467
	Commercial leases			139,966				764				984				—				141,714

			$	4,078,565			$	128,501			$	169,292			$	3,101			$	4,379,459

	December 31, 2012
	Commercial real estate		$	2,282,139			$	57,938			$	106,258			$	2,136			$	2,448,471
	Commercial and industrial			1,472,598				32,227				49,814				662				1,555,301
	Commercial leases			126,283				243				3,607				—				130,133

			$	3,881,020			$	90,408			$	159,679			$	2,798			$	4,133,905

	Acquired Loans:
	September 30, 2013
	Commercial real estate		$	277,806			$	47,663			$	45,673			$	1,388			$	372,530
	Commercial and industrial			49,105				5,067				11,582				14				65,768
	Commercial leases			—				—				—				—				—

			$	326,911			$	52,730			$	57,255			$	1,402			$	438,298

	December 31, 2012
	Commercial real estate		$	204,300			$	14,713			$	39,093			$	469			$	258,575
	Commercial and industrial			39,596				3,611				3,804				2				47,013
	Commercial leases			—				—				—				—				—

			$	243,896			$	18,324			$	42,897			$	471			$	305,588

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-				Total
			Performing				Performing				Total
	September 30, 2013
	Direct installment		$	1,339,139			$	10,665			$	1,349,804
	Residential mortgages			656,674				13,304				669,978
	Indirect installment			629,838				1,092				631,030
	Consumer lines of credit			803,904				549				804,453
	Other			52,511				—				52,511
	December 31, 2012
	Direct installment		$	1,100,324			$	8,541			$	1,108,865
	Residential mortgages			642,406				11,420				653,826
	Indirect installment			567,192				1,132				568,324
	Consumer lines of credit			731,788				746				732,534
	Other			36,437				3,500				39,937
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 Nine Months Ended September 30, 2013
	With no specific allowance recorded:
	Commercial real estate		$	34,281			$	46,548			$	—			$	34,165
	Commercial and industrial			9,308				11,377				—				9,448
	Commercial leases			782				782				—				729

	Total commercial loans and leases			44,371				58,707				—				44,342
	Direct installment			10,665				10,901				—				10,451
	Residential mortgages			13,298				13,561				—				13,767
	Indirect installment			1,092				2,491				—				1,169
	Consumer lines of credit			549				609				—				631
	Other			—				—				—				583

	With a specific allowance recorded:
	Commercial real estate			14,300				23,748				2,782				14,379
	Commercial and industrial			124				131				124				126
	Commercial leases			—				—				—				—

	Total commercial loans and leases			14,424				23,879				2,906				14,505
	Direct installment			—				—				—				—
	Residential mortgages			—				—				—				—
	Indirect installment			—				—				—				—
	Consumer lines of credit			—				—				—				—
	Other			—				—				—				—

	Total:
	Commercial real estate			48,581				70,296				2,782				48,544
	Commercial and industrial			9,432				11,508				124				9,574
	Commercial leases			782				782				—				729

	Total commercial loans and leases			58,795				82,586				2,906				58,847
	Direct installment			10,665				10,901				—				10,451
	Residential mortgages			13,298				13,561				—				13,767
	Indirect installment			1,092				2,491				—				1,169
	Consumer lines of credit			549				609				—				631
	Other			—				—				—				583
	At or For the Year Ended December 31, 2012
	With no specific allowance recorded:
	Commercial real estate		$	37,119			$	50,234			$	—			$	36,426
	Commercial and industrial			7,074				9,597				—				6,992
	Commercial leases			965				—				—				1,053

	Total commercial loans and leases			45,158				59,831				—				44,471
	Direct installment			8,541				8,693				—				6,443
	Residential mortgages			11,414				11,223				—				9,059
	Indirect installment			1,132				2,381				—				1,133
	Consumer lines of credit			746				792				—				591
	Other			3,500				3,500				—				3,500

	With a specific allowance recorded:
	Commercial real estate			12,623				21,877				2,136				14,522
	Commercial and industrial			590				590				590				592
	Commercial leases			—				—				—				—

	Total commercial loans and leases			13,213				22,467				2,726				15,114
	Direct installment			—				—				—				—
	Residential mortgages			—				—				—				—
Indirect installment			—				—				—				—
Consumer lines of credit			—				—				—				—
Other			—				—				—				—

Total:
Commercial real estate			49,742				72,111				2,136				50,948
Commercial and industrial			7,664				10,187				590				7,584
Commercial leases			965				—				—				1,053

Total commercial loans and leases			58,371				82,298				2,726				59,585
Direct installment			8,541				8,693				—				6,443
Residential mortgages			11,414				11,223				—				9,059
Indirect installment			1,132				2,381				—				1,133
Consumer lines of credit			746				792				—				591
Other			3,500				3,500				—				3,500
Summary of Composition of Total TDRs	'
	Following is a summary of the composition of total TDRs:


			September 30,				December 31,
			2013				2012
	Accruing:
	Performing		$	10,102			$	12,659
	Non-performing			17,252				14,876
	Non-accrual			12,185				12,385

			$	39,539			$	39,920

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												Nine Months Ended
			September 30, 2013												September 30, 2013
			Number				Pre-				Post-				Number				Pre-				Post-
			of				Modification				Modification				of				Modification				Modification
			Contracts				Outstanding				Outstanding				Contracts				Outstanding				Outstanding
							Recorded				Recorded								Recorded				Recorded
							Investment				Investment								Investment				Investment
	Commercial real estate			2			$	212			$	207				7			$	1,252			$	1,031
	Commercial and industrial			—				—				—				—				—				—
	Commercial leases			—				—				—				—				—				—

	Total commercial loans and leases			2				212				207				7				1,252				1,031
	Direct installment			117				1,199				1,168				300				3,078				2,930
	Residential mortgages			9				346				348				39				1,809				1,784
	Indirect installment			5				20				18				20				92				84
	Consumer lines of credit			1				6				6				14				207				204
	Other			—				—				—				—				—				—

				134			$	1,783			$	1,747				380			$	6,438			$	6,033


			Three Months Ended												Nine Months Ended
			30-Sep-12												30-Sep-12
			Number				Pre-				Post-				Number				Pre-				Post-
			of				Modification				Modification				of				Modification				Modification
			Contracts				Outstanding				Outstanding				Contracts				Outstanding				Outstanding
							Recorded				Recorded								Recorded				Recorded
							Investment				Investment								Investment				Investment
	Commercial real estate			13			$	2,183			$	2,245				16			$	2,341			$	2,971
	Commercial and industrial			4				51				48				7				254				123
	Commercial leases			—				—				—				—				—				—

	Total commercial loans and leases			17				2,234				2,293				23				2,595				3,094
	Direct installment			50				237				228				229				1,597				1,557
	Residential mortgages			15				934				996				39				2,085				2,266
	Indirect installment			4				30				30				17				105				97
	Consumer lines of credit			2				2				3				4				5				5
	Other			—				—				—				—				—				—

				88			$	3,437			$	3,550				312			$	6,387			$	7,019

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 during the periods indicated, 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								Nine Months Ended
			September 30, 2013 (1)								September 30, 2013 (1)
			Number of				Recorded				Number of				Recorded
			Contracts				Investment				Contracts				Investment
	Commercial real estate			—			$	—				1			$	751
	Commercial and industrial			—				—				1				15
	Commercial leases			—				—				—				—

	Total commercial loans and leases			—				—				2				766
	Direct installment			24				254				53				509
	Residential mortgages			2				99				5				240
	Indirect installment			—				—				4				37
	Consumer lines of credit			1				85				1				85
	Other			—				—				—				—

				27			$	438				65			$	1,637


			Three Months Ended								Nine Months Ended
			September 30, 2012 (1)								September 30, 2012 (1)
			Number of				Recorded				Number of				Recorded
			Contracts				Investment				Contracts				Investment
	Commercial real estate			—			$	—				—			$	—
	Commercial and industrial			—				—				—				—
	Commercial leases			—				—				—				—

	Total commercial loans and leases			—				—				—				—
	Direct installment			21				138				27				165
	Residential mortgages			1				25				3				208
	Indirect installment			2				6				3				8
	Consumer lines of credit			—				—				—				—
	Other			—				—				—				—

				24			$	169				33			$	381


	-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 September 30, 2013
	Commercial real estate		$	35,666			$	(365	)		$	80			$	(285	)		$	(538	)		$	34,843
	Commercial and industrial			32,486				(1,529	)			231				(1,298	)			1,460				32,648
	Commercial leases			1,756				(69	)			59				(10	)			21				1,767

	Total commercial loans and leases			69,908				(1,963	)			370				(1,593	)			943				69,258
	Direct installment			15,993				(2,183	)			227				(1,956	)			3,194				17,231
	Residential mortgages			5,120				(174	)			50				(124	)			437				5,433
	Indirect installment			5,626				(807	)			188				(619	)			1,120				6,127
	Consumer lines of credit			6,421				(454	)			60				(394	)			1,052				7,079
	Other			(219	)			(333	)			—				(333	)			760				208

	Total allowance on originated loans			102,849				(5,914	)			895				(5,019	)			7,506				105,336


	Purchased credit-impaired loans			325				—				—				—				337				662
	Other acquired loans			5,106				70				(559	)			(489	)			(563	)			4,054

	Total allowance on acquired loans			5,431				70				(559	)			(489	)			(226	)			4,716


	Total allowance		$	108,280			$	(5,844	)		$	336			$	(5,508	)		$	7,280			$	110,052


	Three Months Ended September 30, 2012
	Commercial real estate		$	38,480			$	(1,481	)		$	1,375			$	(106	)		$	(3,360	)		$	35,014
	Commercial and industrial			30,779				(3,746	)			(19	)			(3,765	)			4,861				31,875
	Commercial leases			1,674				(216	)			78				(138	)			214				1,750

	Total commercial loans and leases			70,933				(5,443	)			1,434				(4,009	)			1,715				68,639
	Direct installment			14,536				(1,985	)			225				(1,760	)			1,929				14,705
	Residential mortgages			4,259				(3	)			4				1				256				4,516
	Indirect installment			5,666				(688	)			158				(530	)			539				5,675
	Consumer lines of credit			5,266				(831	)			37				(794	)			1,556				6,028
	Other			203				(270	)			—				(270	)			229				162

	Total allowance on originated loans			100,863				(9,220	)			1,858				(7,362	)			6,224				99,725


	Purchased credit-impaired loans			784				—				—				—				2,205				2,989
	Other acquired loans			—				—				—				—				—				—

	Total allowance on acquired loans			784				—				—				—				2,205				2,989


	Total allowance		$	101,647			$	(9,220	)		$	1,858			$	(7,362	)		$	8,429			$	102,714

	Nine Months Ended September 30, 2013
	Commercial real estate		$	34,810			$	(3,067	)		$	1,606			$	(1,461	)		$	1,494			$	34,843
	Commercial and industrial			31,849				(4,262	)			734				(3,528	)			4,327				32,648
	Commercial leases			1,744				(317	)			161				(156	)			179				1,767

	Total commercial loans and leases			68,403				(7,646	)			2,501				(5,145	)			6,000				69,258
	Direct installment			15,130				(6,824	)			709				(6,115	)			8,216				17,231
	Residential mortgages			5,155				(733	)			90				(643	)			921				5,433
	Indirect installment			5,449				(2,349	)			576				(1,773	)			2,451				6,127
	Consumer lines of credit			6,057				(1,183	)			209				(974	)			1,996				7,079
Other			—				(721	)			—				(721	)			929				208

Total allowance on originated loans			100,194				(19,456	)			4,085				(15,371	)			20,513				105,336


Purchased credit-impaired loans			759				(156	)			—				(156	)			59				662
Other acquired loans			3,421				(1,199	)			(320	)			(1,519	)			2,152				4,054

Total allowance on acquired loans			4,180				(1,355	)			(320	)			(1,675	)			2,211				4,716


Total allowance		$	104,374			$	(20,811	)		$	3,765			$	(17,046	)		$	22,724			$	110,052


Nine Months Ended September 30, 2012
Commercial real estate		$	43,283			$	(4,733	)		$	1,634			$	(3,099	)		$	(5,170	)		$	35,014
Commercial and industrial			25,476				(7,086	)			349				(6,737	)			13,136				31,875
Commercial leases			1,556				(509	)			177				(332	)			526				1,750

Total commercial loans and leases			70,315				(12,328	)			2,160				(10,168	)			8,492				68,639
Direct installment			14,814				(5,908	)			721				(5,187	)			5,078				14,705
Residential mortgages			4,437				(644	)			127				(517	)			596				4,516
Indirect installment			5,503				(2,128	)			433				(1,695	)			1,867				5,675
Consumer lines of credit			5,447				(1,585	)			146				(1,439	)			2,020				6,028
Other			146				(716	)			—				(716	)			732				162

Total allowance on originated loans			100,662				(23,309	)			3,587				(19,722	)			18,785				99,725


Purchased credit-impaired loans			—				(254	)			—				(254	)			3,243				2,989
Other acquired loans			—				—				—				—				—				—

Total allowance on acquired loans			—				(254	)			—				(254	)			3,243				2,989


Total allowance		$	100,662			$	(23,563	)		$	3,587			$	(19,976	)		$	22,028			$	102,714

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
	September 30, 2013
	Commercial real estate		$	2,782			$	32,061			$	2,548,278			$	35,740			$	2,512,538
	Commercial and industrial			124				32,524				1,689,467				5,357				1,684,110
	Commercial leases			—				1,767				141,714				—				141,714

	Total commercial loans and leases			2,906				66,352				4,379,459				41,097				4,338,362
	Direct installment			—				17,231				1,349,804				—				1,349,804
	Residential mortgages			—				5,433				669,978				—				669,978
	Indirect installment			—				6,127				631,030				—				631,030
	Consumer lines of credit			—				7,079				804,453				—				804,453
	Other			—				208				52,511				—				52,511

			$	2,906			$	102,430			$	7,887,235			$	41,097			$	7,846,138

	December 31, 2012
	Commercial real estate		$	2,136			$	32,674			$	2,448,471			$	35,024			$	2,413,447
	Commercial and industrial			590				31,259				1,555,301				1,624				1,553,677
	Commercial leases			—				1,744				130,133				—				130,133

	Total commercial loans and leases			2,726				65,677				4,133,905				36,648				4,097,257
	Direct installment			—				15,130				1,108,865				—				1,108,865
	Residential mortgages			—				5,155				653,826				—				653,826
	Indirect installment			—				5,449				568,324				—				568,324
	Consumer lines of credit			—				6,057				732,534				—				732,534
	Other			—				—				39,937				—				39,937

			$	2,726			$	97,468			$	7,237,391			$	36,648			$	7,200,743

BORROWINGS_Tables

BORROWINGS (Tables)	9 Months Ended
BORROWINGS (Tables)	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Summary Of Short-Term Borrowings	'
	Following is a summary of short-term borrowings:


		September 30,		December 31,
		2013		2012
	Securities sold under repurchase agreements	$	834,610	$	807,820
	Federal funds purchased		200,000		140,000
	Subordinated notes		131,570		135,318

		$	1,166,180	$	1,083,138

Summary Of Long-Term Debt	'
	Following is a summary of long-term debt:


		September 30,		December 31,
		2013		2012
	Federal Home Loan Bank advances	$	79	$	88
	Subordinated notes		82,457		79,897
	Other subordinated debt		8,691		8,850
	Convertible debt		580		590

		$	91,807	$	89,425

JUNIOR_SUBORDINATED_DEBT_Table

JUNIOR SUBORDINATED DEBT (Tables)	9 Months Ended
JUNIOR SUBORDINATED DEBT (Tables)	Sep. 30, 2013
Text Block [Abstract]	'
Junior Subordinated Debt Trusts	'
	The following table provides information relating to the Trusts as of September 30, 2013:


		Trust		Common		Junior		Stated		Interest
		Preferred		Securities		Subordinated		Maturity		Rate
		Securities				Debt		Date
	F.N.B. Statutory Trust I	$	110,000	$	3,866	$	113,866		3/31/33		3.52	%	Variable; LIBOR + 325 basis points (bps)
	F.N.B. Statutory Trust II		21,500		665		22,165		6/15/36		1.9	%	Variable; LIBOR + 165 bps
	Omega Financial Capital Trust I		36,000		1,114		36,016		10/18/34		2.46	%	Variable; LIBOR + 219 bps
	Sun Bancorp Statutory Trust I		16,500		511		17,011		2/22/31		10.2	%	Fixed
	Annapolis Bancorp Statutory Trust I		5,000		155		5,155		3/26/33		3.4	%	Variable; LIBOR + 315 bps

		$	189,000	$	6,311	$	194,213

DERIVATIVE_INSTRUMENTS_Tables

DERIVATIVE INSTRUMENTS (Tables)	9 Months Ended
DERIVATIVE INSTRUMENTS (Tables)	Sep. 30, 2013
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:
	September 30, 2013
	Derivative assets subject to master netting arrangement:
	Interest rate contracts	$	2,225				—			$	2,225
	Equity contracts		18				—				18
	Derivative assets not subject to master netting arrangement:
	Interest rate contracts		35,799				—				35,799

	Total derivative assets	$	38,042				—			$	38,042

	December 31, 2012
	Derivative assets subject to master netting arrangement:
	Equity contracts	$	16				—			$	16
	Derivative assets not subject to master netting arrangement:
	Interest rate contracts		57,992				—				57,992

	Total derivative assets	$	58,008				—			$	58,008

Offsetting of Derivative Liabilities	'

		Gross				Gross				Net Amount
		Amount				Amounts				Presented in
						Offset in				the Balance
						the Balance				Sheet
						Sheet
	Offsetting of Derivative Assets:
	September 30, 2013
	Derivative assets subject to master netting arrangement:
	Interest rate contracts	$	2,225				—			$	2,225
	Equity contracts		18				—				18
	Derivative assets not subject to master netting arrangement:
	Interest rate contracts		35,799				—				35,799

	Total derivative assets	$	38,042				—			$	38,042

	December 31, 2012
	Derivative assets subject to master netting arrangement:
	Equity contracts	$	16				—			$	16
	Derivative assets not subject to master netting arrangement:
	Interest rate contracts		57,992				—				57,992

	Total derivative assets	$	58,008				—			$	58,008

	Offsetting of Derivative Liabilities:
	September 30, 2013
	Derivative liabilities subject to master netting arrangement:
	Interest rate contracts	$	43,045				—			$	43,045
	Derivative liabilities not subject to master netting arrangement:
	Interest rate contracts		1,409				—				1,409
	Equity contracts		18				—				18

	Total derivative liabilities	$	44,472				—			$	44,472

	December 31, 2012
	Derivative liabilities subject to master netting arrangement:
	Interest rate contracts	$	58,134				—			$	58,134
	Derivative liabilities not subject to master netting arrangement:
	Equity contracts		16				—				16

	Total derivative liabilities	$	58,150				—			$	58,150

Derivative Assets	'

						Gross Amounts Not Offset in the
						Balance Sheet
		Net Amount				Financial				Cash		Net Amount
		Presented in the				Instruments				Collateral
		Balance Sheet								Received
	Derivative Assets:
	September 30, 2013
	Counterparty B	$	2			$	2			$	—	$	—
	Counterparty D		205				205				—		—
	Counterparty E		936				936				—		—
	Counterparty F		205				205				—		—
	Counterparty G		112				112				—		—
	Counterparty I		386				386				—		—
	Counterparty J		397				—				397		—

		$	2,243			$	1,846			$	397		—

	December 31, 2012
	Counterparty E	$	16				—				—	$	16

Derivative Liabilities	'
	Gross Amounts Not Offset in the
	Balance Sheet
		Net Amount				Financial				Cash		Net Amount
		Presented in the				Instruments				Collateral
		Balance Sheet								Received
	Derivative Liabilities:
	September 30, 2013
	Counterparty A	$	5,528			$	5,528			$	—	$	—
	Counterparty B		3,714				3,612				—		102
	Counterparty C		1,589				1,589				—		—
	Counterparty D		10,131				10,131				—		—
	Counterparty E		6,069				6,069				—		—
	Counterparty F		25				25				—		—
	Counterparty G		5,213				5,213				—		—
	Counterparty H		2,634				125				—		2,509
	Counterparty I		6,629				6,629				—		—
	Counterparty J		1,513				—				1,513		—

		$	43,045			$	38,921			$	1,513	$	2,611


	December 31, 2012
	Counterparty A	$	8,393			$	8,393				—	$	—
	Counterparty B		5,601				5,601				—		—
	Counterparty C		2,145				2,145				—		—
	Counterparty D		12,354				12,354				—		—
	Counterparty E		8,846				8,846				—		—
	Counterparty F		353				282				—		71
	Counterparty G		5,497				5,497				—		—
	Counterparty H		3,937				1,775				—		2,162
	Counterparty I		11,008				11,008				—		—

		$	58,134			$	55,901				—	$	2,233
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		Nine Months Ended
		Statement		September 30,
		Location		2013				2012
	Interest Rate Products	Other income		$	40			$	40

COMMITMENTS_CREDIT_RISK_AND_CO1

COMMITMENTS, CREDIT RISK AND CONTINGENCIES (Tables)	9 Months Ended
	Sep. 30, 2013
Commitments And Contingencies Disclosure [Abstract]	'
Summary of Off-Balance Sheet Credit Risk Information	'
	Following is a summary of off-balance sheet credit risk information:


		September 30,		December 31,
		2013		2012
	Commitments to extend credit	$	2,822,545	$	2,600,355
	Standby letters of credit		122,713		130,912

STOCK_INCENTIVE_PLANS_Tables

STOCK INCENTIVE PLANS (Tables)	9 Months Ended
STOCK INCENTIVE PLANS (Tables)	Sep. 30, 2013
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:


		Nine Months Ended September 30,
		2013					2012
		Awards			Weighted		Awards			Weighted
					Average					Average
					Grant					Grant
					Price					Price
	Unvested awards outstanding at beginning of period		1,913,073		$	9.17		1,846,115		$	8.44
	Granted		344,479			11.04		275,674			12.28
	Net adjustment due to performance		73,835			10.6		28,181			8.31
	Vested		(734,129	)		7.6		(168,361	)		8.06
	Forfeited		(37,175	)		10.4		(166,018	)		8.53
	Dividend reinvestment		43,934			11.66		55,349			11.38

	Unvested awards outstanding at end of period		1,604,017			10.26		1,870,940			9.12

Components of Restricted Stock Awards	'
	Compensation. The components of the restricted stock awards as of September 30, 2013 are as follows:


		Service-			Performance-		Total
		Based			Based
		Awards			Awards
	Unvested awards		425,378			1,178,639		1,604,017
	Unrecognized compensation expense	$	1,980		$	3,806	$	5,786
	Intrinsic value	$	5,160		$	14,297	$	19,457
	Weighted average remaining life (in years)		2.24			2.35		2.32
Summary of Information Concerning Stock Option Awards	'
	The following table summarizes certain information concerning stock option awards:


		Nine Months Ended September 30,
		2013					2012
		Shares			Weighted		Shares			Weighted
					Average					Average
					Exercise					Exercise
					Price					Price
	Options outstanding at beginning of period		640,050		$	13.21		586,020		$	14.93
	Assumed from acquisition		19,223			7.92		627,808			10.41
	Exercised		(36,647	)		8.9		(174,565	)		8.8
	Forfeited		(298,150	)		15.1		(329,477	)		13.74

	Options outstanding and exercisable at end of period		324,476			11.65		709,786			12.99

RETIREMENT_AND_OTHER_POSTRETIR1

RETIREMENT AND OTHER POSTRETIREMENT BENEFIT PLANS (Tables)	9 Months Ended
RETIREMENT AND OTHER POSTRETIREMENT BENEFIT PLANS (Tables)	Sep. 30, 2013
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						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Service cost	$	15		$	13		$	51		$	47
	Interest cost		1,437			1,545			4,291			4,627
	Expected return on plan assets		(2,271	)		(2,034	)		(6,811	)		(5,902	)
	Amortization:
	Unrecognized net transition asset		(24	)		(24	)		(70	)		(70	)
	Unrecognized prior service cost (credit)		2			2			6			6
	Unrecognized loss		575			484			1,689			1,378

	Net periodic pension benefit cost	$	(266	)	$	(14	)	$	(844	)	$	86

Net Periodic Postretirement Benefit Cost	'
	The net periodic postretirement benefit cost includes the following components:


		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Interest cost	$	8		$	9		$	24		$	33
	Amortization of unrecognized loss		2			(3	)		2			3

	Net periodic postretirement benefit cost	$	10		$	6		$	26		$	36

COMPREHENSIVE_INCOME_Tables

COMPREHENSIVE INCOME (Tables)	9 Months Ended
COMPREHENSIVE INCOME (Tables)	Sep. 30, 2013
Equity [Abstract]	'
Components of Comprehensive Income, Net of Related Tax	'
	The components of comprehensive income, net of related tax, are as follows:


			Three Months Ended						Nine Months Ended
			September 30,						September 30,
			2013			2012			2013			2012
	Net income		$	31,634		$	30,743		$	89,365		$	81,455
	Other comprehensive income (loss):
	Unrealized gains (losses) on securities:
	Arising during the period, net of tax (benefit) expense of $(2,635), $1,061, $(8,835) and $3,112			(4,894	)		1,970			(16,408	)		5,779
	Less: reclassification adjustment for (losses) gains included in net income, net of tax (benefit) expense of $2, $(65), $260 and $247			(3	)		120			(483	)		(459	)
	Unrealized gains (losses) on derivative instruments, net of tax expense (benefit) of $239 and $(2,215)			443			—			(4,113	)		—
	Unrealized gains associated with pension and postretirement benefits, net of tax expense of $194, $161, $569 and $461			360			299			1,057			856

	Other comprehensive income (loss)			(4,094	)		2,389			(19,947	)		6,176

	Comprehensive income		$	27,540		$	33,132		$	69,418		$	87,631


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
	Nine Months Ended September 30, 2013
	Balance at beginning of period		$	9,269		$	(8,039	)	$	(171	)	$	(47,283	)	$	(46,224	)
	Other comprehensive income (loss) before reclassifications			(17,914	)		1,506			(4,113	)		1,057			(19,464	)
	Amounts reclassified from accumulated other comprehensive income			(483	)		—			—			—			(483	)

	Net current period other comprehensive income (loss)			(18,397	)		1,506			(4,113	)		1,057			(19,947	)

	Balance at end of period		$	(9,128	)	$	(6,533	)	$	(4,284	)	$	(46,226	)	$	(66,171	)

Summary of Reclassifications Out of Accumulated Other Comprehensive Income	'
	The following table presents a summary of the reclassifications out of accumulated other comprehensive income:
	Nine Months Ended September 30, 2013


	Details About Accumulated Other Comprehensive Income Component		Amount			Affected Line Item
			Reclassified from			in the Statement
			Other			where Net Income
			Comprehensive			is Presented
			Income
	Unrealized net gains on securities available for sale (1)		$	(743	)	Net securities gains
				(260	)	Tax expense

			$	(483	)


	-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_SHARE_Tables

EARNINGS PER SHARE (Tables)	9 Months Ended
EARNINGS PER SHARE (Tables)	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Computation of Basic and Diluted Earnings Per Share	'
	The following table sets forth the computation of basic and diluted earnings per share:


		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2013		2012		2013		2012
	Net income	$	31,634	$	30,743	$	89,365	$	81,455


	Basic weighted average common shares outstanding		144,759,887		139,228,812		142,949,134		139,074,244
	Net effect of dilutive stock options, warrants, restricted stock and convertible debt		1,686,555		1,535,240		1,520,683		1,474,334

	Diluted weighted average common shares outstanding		146,446,442		140,764,052		144,469,817		140,548,578


	Basic earnings per share	$	0.22	$	0.22	$	0.63	$	0.59

	Diluted earnings per share	$	0.22	$	0.22	$	0.62	$	0.58

CASH_FLOW_INFORMATION_Tables

CASH FLOW INFORMATION (Tables)	9 Months Ended
CASH FLOW INFORMATION (Tables)	Sep. 30, 2013
Supplemental Cash Flow Elements [Abstract]	'
Summary of Supplemental Cash Flow Information	'
	Following is a summary of supplemental cash flow information:


	Nine Months Ended September 30	2013		2012
	Interest paid on deposits and other borrowings	$	36,340	$	42,227
	Income taxes paid		18,700		7,250
	Transfers of loans to other real estate owned		10,856		12,086
	Financing of other real estate owned sold		549		701

BUSINESS_SEGMENTS_Tables

BUSINESS SEGMENTS (Tables)	9 Months Ended
BUSINESS SEGMENTS (Tables)	Sep. 30, 2013
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 and			Consolidated
		Banking		Management		Insurance		Finance		Other			Consolidated
	At or for the Three Months Ended September 30, 2013
	Interest income	$	98,716	$	—	$	27	$	9,600	$	1,447		$	109,790
	Interest expense		7,552		—		—		839		2,145			10,536
	Net interest income		91,164		—		27		8,761		(698	)		99,254
	Provision for loan losses		5,432		—		—		1,725		123			7,280
	Non-interest income		24,365		6,916		3,222		681		(2,326	)		32,858
	Non-interest expense		68,091		5,850		2,799		4,724		(358	)		81,106
	Intangible amortization		1,938		76		101		—		—			2,115
	Income tax expense (benefit)		9,552		366		128		1,145		(1,214	)		9,977
	Net income (loss)		30,516		624		221		1,848		(1,575	)		31,634
	Total assets		12,610,043		19,614		19,788		182,695		(41,861	)		12,790,279
	Total intangibles		725,389		11,084		10,627		1,809		—			748,909

	At or for the Three Months Ended September 30, 2012
	Interest income	$	97,364	$	—	$	27	$	8,860	$	1,505		$	107,756
	Interest expense		10,912		—		—		869		2,444			14,225
	Net interest income		86,452		—		27		7,991		(939	)		93,531
	Provision for loan losses		6,826		—		—		1,421		182			8,429
	Non-interest income		25,048		6,006		3,602		590		(433	)		34,813
	Non-interest expense		61,820		4,844		2,947		4,829		400			74,840
	Intangible amortization		2,056		80		106		—		—			2,242
	Income tax expense (benefit)		11,456		396		204		888		(854	)		12,090
	Net income (loss)		29,342		686		372		1,443		(1,100	)		30,743
	Total assets		11,803,432		19,075		19,281		170,304		(27,201	)		11,984,891
	Total intangibles		693,029		11,392		11,033		1,809		—			717,263

	At or for the Nine Months Ended September 30, 2013
	Interest income	$	289,984	$	—	$	82	$	27,920	$	4,763		$	322,749
	Interest expense		24,449		—		—		2,533		6,671			33,653
	Net interest income		265,535		—		82		25,387		(1,908	)		289,096
	Provision for loan losses		17,283		—		—		4,930		511			22,724
	Non-interest income		74,118		21,294		10,024		2,029		(4,183	)		103,282
	Non-interest expense		198,395		18,338		8,420		14,063		823			240,039
	Intangible amortization		5,694		228		304		—		—			6,226
	Income tax expense (benefit)		32,486		1,009		497		3,234		(3,202	)		34,024
	Net income (loss)		85,795		1,719		885		5,189		(4,223	)		89,365
	Total assets		12,610,043		19,614		19,788		182,695		(41,861	)		12,790,279
	Total intangibles		725,389		11,084		10,627		1,809		—			748,909
	At or for the Nine Months Ended September 30, 2012
	Interest income	$	293,756	$	4	$	85	$	25,888	$	4,595		$	324,328
	Interest expense		35,130		—		—		2,736		7,529			45,395
	Net interest income		258,626		4		85		23,152		(2,934	)		278,933
	Provision for loan losses		17,215		—		—		4,218		595			22,028
	Non-interest income		72,904		17,889		10,072		1,674		(3,203	)		99,336
	Non-interest expense		196,510		14,587		8,658		14,016		1,574			235,345
	Intangible amortization		6,334		240		318		—		—			6,892
	Income tax expense (benefit)		31,882		1,117		420		2,530		(3,400	)		32,549
	Net income (loss)		79,589		1,949		761		4,062		(4,906	)		81,455
	Total assets		11,803,432		19,075		19,281		170,304		(27,201	)		11,984,891
	Total intangibles		693,029		11,392		11,033		1,809		—			717,263

FAIR_VALUE_MEASUREMENTS_Tables

FAIR VALUE MEASUREMENTS (Tables)	9 Months Ended
FAIR VALUE MEASUREMENTS (Tables)	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Balances of Assets and Liabilities Measured at Fair Value on Recurring Basis	'
	The following table presents the balances of assets and liabilities measured at fair value on a recurring basis:


			Level 1				Level 2				Level 3				Total
	September 30, 2013
	Assets measured at fair value
	Available for sale debt securities
	U.S. government-sponsored entities		$	—			$	332,152			$	—			$	332,152
	Residential mortgage-backed securities
	Agency mortgage-backed securities			—				227,638				—				227,638
	Agency collateralized mortgage obligations			—				489,047				—				489,047
	Non-agency collateralized mortgage obligations			—				19				1,827				1,846
	States of the U.S. and political subdivisions			—				17,875				—				17,875
	Collateralized debt obligations			—				—				28,704				28,704
	Other debt securities			—				16,128				—				16,128

				—				1,082,859				30,531				1,113,390

	Available for sale equity securities
	Financial services industry			686				1,020				398				2,104
	Insurance services industry			64				—				—				64

				750				1,020				398				2,168

				750				1,083,879				30,929				1,115,558
	Derivative financial instruments
	Trading			—				37,655				—				37,655
	Not for trading			—				387				—				387

				—				38,042				—				38,042

			$	750			$	1,121,921			$	30,929			$	1,153,600


	Liabilities measured at fair value
	Derivative financial instruments
	Trading			—			$	37,495				—			$	37,495
	Not for trading			—				6,977				—				6,977

				—			$	44,472				—			$	44,472

	December 31, 2012
	Assets measured at fair value
	Available for sale debt securities
	U.S. government-sponsored entities		$	—			$	354,457			$	—			$	354,457
	Residential mortgage-backed securities
	Agency mortgage-backed securities			—				275,150				—				275,150
	Agency collateralized mortgage obligations			—				469,547				—				469,547
	Non-agency collateralized mortgage obligations			—				24				2,705				2,729
	States of the U.S. and political subdivisions			—				24,824				—				24,824
	Collateralized debt obligations			—				—				22,456				22,456
	Other debt securities			—				14,621				6,892				21,513

				—				1,138,623				32,053				1,170,676

	Available for sale equity securities
	Financial services industry			351				1,099				512				1,962
	Insurance services industry			45				—				—				45

				396				1,099				512				2,007

				396				1,139,722				32,565				1,172,683
	Derivative financial instruments
Trading			—				58,008				—				58,008
Not for trading			—				—				—				—

			—				58,008				—				58,008

		$	396			$	1,197,730			$	32,565			$	1,230,691


Liabilities measured at fair value
Derivative financial instruments
Trading			—			$	58,150				—			$	58,150
Not for trading			—				—				—				—

			—			$	58,150				—			$	58,150
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
	Nine Months Ended September 30, 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			4,561				21				6				(21	)		4,567
	Accretion included in earnings			2,311				4				—				11			2,326
	Purchases, issuances, sales and settlements:
	Purchases			—				—				—				—			—
	Issuances			29				—				—				—			29
	Sales/redemptions			—				(1,033	)			—				—			(1,033	)
	Settlements			(653	)			—				—				(868	)		(1,521	)
	Transfers from Level 3			—				(5,962	)			(120	)			—			(6,082	)
	Transfers into Level 3			—				—				—				—			—

	Balance at end of period		$	28,704			$	—			$	398			$	1,827		$	30,929

	Year Ended December 31, 2012
	Balance at beginning of period		$	5,998			$	5,197			$	408			$	—		$	11,603
	Total gains (losses) – realized/unrealized:
	Included in earnings			—				—				—				—			—
	Included in other comprehensive income			917				732				104				49			1,802
	Accretion included in earnings			2,515				9				—				20			2,544
	Purchases, issuances, sales and settlements:
	Purchases			16,569				954				—				4,230			21,753
	Issuances			46				—				—				—			46
	Sales/redemptions			(2,542	)			—				—				—			(2,542	)
	Settlements			(1,047	)			—				—				(1,594	)		(2,641	)
	Transfers from Level 3			—				—				—				—			—
	Transfers into Level 3			—				—				—				—			—

	Balance at end of period		$	22,456			$	6,892			$	512			$	2,705		$	32,565

Additional Information about Assets Measured at Fair Value on Non-Recurring Basis	'
	fair value adjustments were previously described. For assets measured at fair value on a non-recurring basis still held at the balance sheet date, the following table provides the hierarchy level and the fair value of the related assets or portfolios:


			Level 1				Level 2				Level 3				Total
	September 30, 2013
	Impaired loans			—			$	3,880			$	9,242			$	13,122
	Other real estate owned			—				4,751				4,634				9,385
	December 31, 2012
	Impaired loans			—			$	14,325			$	3,171			$	17,496
	Other real estate owned			—				5,771				13,540				19,311
	Investment security, held-to-maturity:
	Non-agency CMO			—				—				3,636				3,636
Fair Values of Corporation's Financial Instruments	'
	The fair values of the Corporation’s financial instruments are as follows:


											Fair Value Measurements
			Carrying				Fair				Level 1				Level 2			Level 3
			Amount				Value				Level 1				Level 2			Level 3
	September 30, 2013
	Financial Assets
	Cash and cash equivalents		$	283,509			$	283,509			$	283,509			$	—		$	—
	Securities available for sale			1,115,558				1,115,558				750				1,083,879			30,929
	Securities held to maturity			1,180,992				1,181,652				—				1,174,282			7,370
	Net loans, including loans held for sale			8,734,958				8,597,123				—				—			8,597,123
	Bank owned life insurance			263,781				268,641				268,641				—			—
	Derivative assets			38,042				38,042				—				38,042			—
	Accrued interest receivable			33,025				33,025				33,025				—			—
	Financial Liabilities
	Deposits			9,723,371				9,736,492				7,375,322				2,361,170			—
	Short-term borrowings			1,166,180				1,166,180				1,166,180				—			—
	Long-term debt			91,807				94,670				—				—			94,670
	Junior subordinated debt			194,213				190,150				—				—			190,150
	Derivative liabilities			44,472				44,472				—				44,472			—
	Accrued interest payable			6,368				6,368				6,368				—			—
	December 31, 2012
	Financial Assets
	Cash and cash equivalents		$	239,044			$	239,044			$	239,044			$	—		$	—
	Securities available for sale			1,172,683				1,172,683				396				1,139,722			32,565
	Securities held to maturity			1,106,563				1,143,213				—				1,128,524			14,689
	Net loans, including loans held for sale			8,061,096				7,996,554				—				—			7,966,554
	Bank owned life insurance			246,088				257,060				257,060				—			—
	Derivative assets			58,008				58,008				—				58,008			—
	Accrued interest receivable			30,210				30,210				30,210				—			—
	Financial Liabilities
	Deposits			9,082,174				9,117,757				6,546,316				2,571,441			—
	Short-term borrowings			1,083,138				1,083,138				1,083,138				—			—
	Long-term debt			89,425				92,329				—				—			92,329
	Junior subordinated debt			204,019				172,246				—				—			172,246
	Derivative liabilities			58,150				58,150				—				58,150			—
	Accrued interest payable			9,054				9,054				9,054				—			—

Business_Additional_Informatio

Business - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2013
	Location
	State
Nature Of Operations [Line Items]	'
Number of states, Company operating financial services	6
Number of metropolitan areas, Company operating financial services	3
Number of banking offices, description	'more than 250
Number of consumer finance offices, description	'more than 70
Minimum [Member]	'
Nature Of Operations [Line Items]	'
Number of consumer finance offices	70
Number of banking offices	250

Securities_Offerings_Additiona

Securities Offerings - Additional Information (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Nov. 01, 2013	Nov. 01, 2013
			Scenario, Forecast [Member]	Scenario, Forecast [Member]
			Stock Offerings [Member]	Underwriters pursuant to an over-allotment option [Member]
Securities Offerings [Line Items]	'	'	'	'
Common stock, shares	145,913,917	140,314,846	4,693,876	612,244
Common stock, per share	$0.01	$0.01	$12.25	'
Preferred stock, shares	'	'	4,000,000	'
Preferred stock, per share	'	'	$25	'
Net proceeds of combined offerings	'	'	$151,175	'
Depositary Shares each representing an Interest in the Non-Cumulative Perpetual Preferred Stock	'	'	0.025	'

Mergers_and_Acquisitions_Addit

Mergers and Acquisitions - Additional Information (Detail) (USD $)	0 Months Ended	1 Months Ended			1 Months Ended
In Thousands, except Share data, unless otherwise specified	Jan. 02, 2013	Jan. 02, 2012	Dec. 31, 2012	Jun. 14, 2013	Oct. 12, 2013	Apr. 06, 2013
	Parkvale Financial Corporation [Member]	Parkvale Financial Corporation [Member]	Parkvale Financial Corporation [Member]	BCSB Bancorp, Inc. (BCSB) [Member]	PVF Capital Corp (PVF) [Member]	Annapolis Bancorp, Inc. [Member]
					Subsequent Event [Member]
Assets acquired as a result of merger	'	$1,743,885	'	$640,000	$714,126	$429,358
Loans acquired as a result of merger	'	919,480	'	'	500,000	254,911
Deposits acquired as a result of merger	'	1,525,253	'	'	620,000	349,370
Value of acquisition	'	140,900	'	79,000	110,280	56,300
Common shares issued	12,159,312	'	'	'	8,893,598	4,641,412
Common shares acquired	5,582,846	'	'	'	26,119,398	4,060,802
Goodwill recorded as a result of merger	'	106,602	'	'	50,898	37,954
Core deposit intangibles recorded as result of the acquisition	'	'	16,033	'	4,400	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	'	819,640	'	'	'	342,564
Warrant expiration date	'	23-Dec-18	'	'	'	30-Jan-19
Warrant exercise price	'	5.81	'	'	'	3.57
Exchange ratio	'	'	'	2.08	'	'

Securities_Schedule_of_Amortiz

Securities - Schedule of Amortized Cost and Fair Value of Securities Available for Sale (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities Available For Sale, Amortized Cost	$1,139,696	$1,170,439
Securities Available For Sale, Gross Unrealized Gains	9,689	16,858
Securities Available For Sale, Gross Unrealized Losses	-33,827	-14,614
Assets measured at fair value, Available for sale securities	1,115,558	1,172,683
U.S. Government-Sponsored Entities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities Available For Sale, Amortized Cost	336,126	352,910
Securities Available For Sale, Gross Unrealized Gains	412	1,676
Securities Available For Sale, Gross Unrealized Losses	-4,386	-129
Assets measured at fair value, Available for sale securities	332,152	354,457
Agency Mortgage-Backed Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities Available For Sale, Amortized Cost	223,125	267,575
Securities Available For Sale, Gross Unrealized Gains	4,641	7,575
Securities Available For Sale, Gross Unrealized Losses	-128	'
Assets measured at fair value, Available for sale securities	227,638	275,150
Agency Collateralized Mortgage Obligations [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities Available For Sale, Amortized Cost	506,672	465,574
Securities Available For Sale, Gross Unrealized Gains	405	4,201
Securities Available For Sale, Gross Unrealized Losses	-18,030	-228
Assets measured at fair value, Available for sale securities	489,047	469,547
Non-Agency Collateralized Mortgage Obligations [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities Available For Sale, Amortized Cost	1,818	2,679
Securities Available For Sale, Gross Unrealized Gains	28	50
Assets measured at fair value, Available for sale securities	1,846	2,729
States of the U.S. and Political Subdivisions [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities Available For Sale, Amortized Cost	17,472	23,592
Securities Available For Sale, Gross Unrealized Gains	542	1,232
Securities Available For Sale, Gross Unrealized Losses	-139	'
Assets measured at fair value, Available for sale securities	17,875	24,824
Collateralized Debt Obligations [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities Available For Sale, Amortized Cost	36,451	34,765
Securities Available For Sale, Gross Unrealized Gains	2,452	967
Securities Available For Sale, Gross Unrealized Losses	-10,199	-13,276
Assets measured at fair value, Available for sale securities	28,704	22,456
Other Debt Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities Available For Sale, Amortized Cost	16,478	21,790
Securities Available For Sale, Gross Unrealized Gains	564	695
Securities Available For Sale, Gross Unrealized Losses	-914	-972
Assets measured at fair value, Available for sale securities	16,128	21,513
Debt Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities Available For Sale, Amortized Cost	1,138,142	1,168,885
Securities Available For Sale, Gross Unrealized Gains	9,044	16,396
Securities Available For Sale, Gross Unrealized Losses	-33,796	-14,605
Assets measured at fair value, Available for sale securities	1,113,390	1,170,676
Equity Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities Available For Sale, Amortized Cost	1,554	1,554
Securities Available For Sale, Gross Unrealized Gains	645	462
Securities Available For Sale, Gross Unrealized Losses	-31	-9
Assets measured at fair value, Available for sale securities	$2,168	$2,007

Securities_Schedule_of_Amortiz1

Securities - Schedule of Amortized Cost and Fair Value of Securities Held to Maturity (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Investment Securities Held To Maturity [Line Items]	'	'
Securities Held To Maturity, Amortized Cost	$1,180,992	$1,106,563
Securities Held To Maturity, Gross Unrealized Gains	18,579	36,785
Securities Held To Maturity, Gross Unrealized Losses	-17,919	-135
Securities Held To Maturity, Fair Value	1,181,652	1,143,213
U.S. Treasury [Member]	'	'
Investment Securities Held To Maturity [Line Items]	'	'
Securities Held To Maturity, Amortized Cost	503	503
Securities Held To Maturity, Gross Unrealized Gains	122	188
Securities Held To Maturity, Gross Unrealized Losses	'	'
Securities Held To Maturity, Fair Value	625	691
U.S. Government-Sponsored Entities [Member]	'	'
Investment Securities Held To Maturity [Line Items]	'	'
Securities Held To Maturity, Amortized Cost	43,403	28,731
Securities Held To Maturity, Gross Unrealized Gains	191	280
Securities Held To Maturity, Gross Unrealized Losses	-1,019	-99
Securities Held To Maturity, Fair Value	42,575	28,912
Agency Mortgage-Backed Securities [Member]	'	'
Investment Securities Held To Maturity [Line Items]	'	'
Securities Held To Maturity, Amortized Cost	650,732	780,022
Securities Held To Maturity, Gross Unrealized Gains	14,679	28,783
Securities Held To Maturity, Gross Unrealized Losses	-2,414	-1
Securities Held To Maturity, Fair Value	662,997	808,804
Agency Collateralized Mortgage Obligations [Member]	'	'
Investment Securities Held To Maturity [Line Items]	'	'
Securities Held To Maturity, Amortized Cost	341,743	133,976
Securities Held To Maturity, Gross Unrealized Gains	759	1,266
Securities Held To Maturity, Gross Unrealized Losses	-12,788	'
Securities Held To Maturity, Fair Value	329,714	135,242
Non-Agency Collateralized Mortgage Obligations [Member]	'	'
Investment Securities Held To Maturity [Line Items]	'	'
Securities Held To Maturity, Amortized Cost	7,317	14,082
Securities Held To Maturity, Gross Unrealized Gains	53	130
Securities Held To Maturity, Gross Unrealized Losses	'	'
Securities Held To Maturity, Fair Value	7,370	14,212
Commercial Mortgage-Backed Securities [Member]	'	'
Investment Securities Held To Maturity [Line Items]	'	'
Securities Held To Maturity, Amortized Cost	2,247	1,024
Securities Held To Maturity, Gross Unrealized Gains	134	39
Securities Held To Maturity, Gross Unrealized Losses	-31	'
Securities Held To Maturity, Fair Value	2,350	1,063
States of the U.S. and Political Subdivisions [Member]	'	'
Investment Securities Held To Maturity [Line Items]	'	'
Securities Held To Maturity, Amortized Cost	135,047	147,713
Securities Held To Maturity, Gross Unrealized Gains	2,641	6,099
Securities Held To Maturity, Gross Unrealized Losses	-1,667	'
Securities Held To Maturity, Fair Value	136,021	153,812
Collateralized Debt Obligations [Member]	'	'
Investment Securities Held To Maturity [Line Items]	'	'
Securities Held To Maturity, Amortized Cost	'	512
Securities Held To Maturity, Gross Unrealized Gains	'	'
Securities Held To Maturity, Gross Unrealized Losses	'	-35
Securities Held To Maturity, Fair Value	'	$477

Securities_Gross_Gains_and_Gro

Securities - Gross Gains and Gross Losses Realized on Sales of Securities (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Investments Debt And Equity Securities [Abstract]	'	'	'	'
Gross gains	$5	$355	$1,120	$1,151
Gross losses	'	-421	-363	-849
Total	$5	($66)	$757	$302

Securities_Amortized_Cost_and_

Securities - Amortized Cost and Fair Value of Securities, by Contractual Maturities (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
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	209,474	'
Available for Sale, Due from five to ten years, Amortized Cost	150,871	'
Available for Sale, Due after ten years, Amortized Cost	46,182	'
Available for Sale, with contractual maturities, Amortized Cost	406,527	'
Total securities available for sale, Amortized Cost	1,139,696	1,170,439
Available for Sale, Due in one year or less, Fair Value	'	'
Available for Sale, Due from one to five years, Fair Value	209,523	'
Available for Sale, Due from five to ten years, Fair Value	147,783	'
Available for Sale, Due after ten years, Fair Value	37,553	'
Available for Sale, with contractual maturities, Fair Value	394,859	'
Total available for sale Securities, Fair Value	1,115,558	1,172,683
Held to Maturity, Due in one year or less, Amortized Cost	2,461	'
Held to Maturity, Due from one to five years, Amortized Cost	34,366	'
Held to Maturity, Due from five to ten years, Amortized Cost	65,749	'
Held to Maturity, Due after ten years, Amortized Cost	76,377	'
Securities Held To Maturity, with contractual maturities, Amortized Cost	178,953	'
Held to Maturity, with contractual maturities, Amortized Cost	1,180,992	1,106,563
Held to Maturity, Due in one year or less, Fair Value	2,483	'
Held to Maturity, Due from one to five years, Fair Value	34,162	'
Held to Maturity, Due from five to ten years, Fair Value	66,086	'
Held to Maturity, Due after ten years, Fair Value	76,490	'
Securities Held To Maturity, with contractual maturities, Fair Value	179,221	'
Held to Maturity, with contractual maturities, Fair Value	1,181,652	1,143,213
Agency Mortgage-Backed Securities [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Total securities available for sale, Amortized Cost	223,125	267,575
Total available for sale Securities, Fair Value	227,638	275,150
Held to Maturity, with contractual maturities, Amortized Cost	650,732	'
Held to Maturity, with contractual maturities, Fair Value	662,997	'
Agency Collateralized Mortgage Obligations [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Total securities available for sale, Amortized Cost	506,672	465,574
Total available for sale Securities, Fair Value	489,047	469,547
Held to Maturity, with contractual maturities, Amortized Cost	341,743	'
Held to Maturity, with contractual maturities, Fair Value	329,714	'
Non-Agency Collateralized Mortgage Obligations [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Total securities available for sale, Amortized Cost	1,818	2,679
Total available for sale Securities, Fair Value	1,846	2,729
Held to Maturity, with contractual maturities, Amortized Cost	7,317	'
Held to Maturity, with contractual maturities, Fair Value	7,370	'
Commercial Mortgage-Backed Securities [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Total securities available for sale, Amortized Cost	'	'
Total available for sale Securities, Fair Value	'	'
Held to Maturity, with contractual maturities, Amortized Cost	2,247	'
Held to Maturity, with contractual maturities, Fair Value	2,350	'
Equity Securities [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Total securities available for sale, Amortized Cost	1,554	1,554
Total available for sale Securities, Fair Value	2,168	2,007
Held to Maturity, with contractual maturities, Amortized Cost	'	'
Held to Maturity, with contractual maturities, Fair Value	'	'

Securities_Additional_Informat

Securities - Additional Information (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
	Security	Sep. 30, 2012	Dec. 31, 2012
Schedule Of Securities [Line Items]	'	'	'
Securities pledged to secure public deposits, trust deposits and for other purposes, carrying value	$1,025,579	'	$725,450
Securities pledged as collateral for short-term borrowings, carrying value	849,901	'	795,812
Recover rate of banks	10.00%	'	'
Recover rate of insurance companies	15.00%	'	'
Number of pooled issue securities	23	'	'
Number of single-issuer securities	4	'	'
Estimated fair value of pooled trust preferred securities	28,704	'	'
Estimated fair value of single-issue trust preferred securities	5,963	'	'
Accretion income recognized by Corporation	2,448	2,138	'
Number of current pooled trust preferred securities	4	'	'
Remaining non-accrual pooled trust preferred securities	2	'	'
Accruing pooled trust preferred securities	3	'	'
Number of pooled securities accreting income	18	'	'
Additional accretion income recognized	'	34	'
Impairment losses on securities	0	119	'
Municipal bond portfolio, value	152,922	'	'
Percent of municipal bond portfolio rated A or better	98.70%	'	'
Percent of municipal bond portfolio, general obligation bonds	99.00%	'	'
Percent of municipal bonds from Pennsylvania	78.00%	'	'
Average holding size of municipal bond	$987	'	'
Percent of portfolio with credit support	67.70%	'	'
Preferred Trust Securities [Member]	'	'	'
Schedule Of Securities [Line Items]	'	'	'
Number of pooled trust preferred securities sold	'	2	'
Senior Tranches [Member]	'	'	'
Schedule Of Securities [Line Items]	'	'	'
Number of single-issuer securities	2	'	'
Mezzanine Tranches [Member]	'	'	'
Schedule Of Securities [Line Items]	'	'	'
Number of pooled issue securities	21	'	'
Minimum [Member]	'	'	'
Schedule Of Securities [Line Items]	'	'	'
Deferral rates after the deferral period ends	10.00%	'	'
Maximum [Member]	'	'	'
Schedule Of Securities [Line Items]	'	'	'
Deferral rates after the deferral period ends	90.00%	'	'

Securities_Summaries_of_Fair_V

Securities - Summaries of Fair Values and Unrealized Losses of Securities, Segregated by Length of Impairment (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Security	Security
Schedule Of Securities [Line Items]	'	'
Number of available for sale securities, Less than 1 year	46	14
Number of available for sale securities, Greater than 1 year	14	13
Number of available for sale securities	60	27
Securities Available For Sale, Less than 12 Months, Fair Value	$626,987	$101,404
Securities Available For Sale, Less than 12 Months, Unrealized Losses	-22,686	-1,275
Securities Available For Sale, 12 Months or More, Fair Value	15,522	11,431
Securities Available For Sale, 12 Months or More, Unrealized Losses	-11,141	-13,339
Securities Available For Sale, Fair Value, Total	642,509	112,835
Securities Available For Sale, Unrealized Losses, Total	-33,827	-14,614
Number of held to maturity securities	66	3
Securities Held To Maturity, Less than 12 Months, Fair Value	580,706	16,325
Securities Held To Maturity, Less than 12 Months, Unrealized Losses	-17,919	-100
Securities Held To Maturity, 12 Months or More, Fair Value	'	477
Securities Held To Maturity, 12 Months or More, Unrealized Losses	'	-35
Securities Held To Maturity, Fair Value, Total	580,706	16,802
Securities Held To Maturity, Unrealized Losses, Total	-17,919	-135
Less than 12 Months [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of held to maturity securities	66	2
Greater than 12 Months [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of held to maturity securities	'	1
U.S. Government-Sponsored Entities [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of available for sale securities, Less than 1 year	12	3
Number of available for sale securities, Greater than 1 year	'	'
Number of available for sale securities	12	3
Securities Available For Sale, Less than 12 Months, Fair Value	173,836	44,868
Securities Available For Sale, Less than 12 Months, Unrealized Losses	-4,386	-129
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	173,836	44,868
Securities Available For Sale, Unrealized Losses, Total	-4,386	-129
Number of held to maturity securities	3	1
Securities Held To Maturity, Less than 12 Months, Fair Value	39,027	14,901
Securities Held To Maturity, Less than 12 Months, Unrealized Losses	-1,019	-99
Securities Held To Maturity, 12 Months or More, Fair Value	'	'
Securities Held To Maturity, 12 Months or More, Unrealized Losses	'	'
Securities Held To Maturity, Fair Value, Total	39,027	14,901
Securities Held To Maturity, Unrealized Losses, Total	-1,019	-99
U.S. Government-Sponsored Entities [Member] \| Less than 12 Months [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of held to maturity securities	3	1
Agency Mortgage-Backed Securities [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of available for sale securities, Less than 1 year	3	'
Number of available for sale securities, Greater than 1 year	'	'
Number of available for sale securities	3	'
Securities Available For Sale, Less than 12 Months, Fair Value	31,737	'
Securities Available For Sale, Less than 12 Months, Unrealized Losses	-128	'
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	31,737	'
Securities Available For Sale, Unrealized Losses, Total	-128	'
Number of held to maturity securities	18	1
Securities Held To Maturity, Less than 12 Months, Fair Value	237,938	1,424
Securities Held To Maturity, Less than 12 Months, Unrealized Losses	-2,414	-1
Securities Held To Maturity, 12 Months or More, Fair Value	'	'
Securities Held To Maturity, 12 Months or More, Unrealized Losses	'	'
Securities Held To Maturity, Fair Value, Total	237,938	1,424
Securities Held To Maturity, Unrealized Losses, Total	-2,414	-1
Agency Mortgage-Backed Securities [Member] \| Less than 12 Months [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of held to maturity securities	18	1
Agency Collateralized Mortgage Obligations [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of available for sale securities, Less than 1 year	28	3
Number of available for sale securities, Greater than 1 year	'	'
Number of available for sale securities	28	3
Securities Available For Sale, Less than 12 Months, Fair Value	416,085	47,174
Securities Available For Sale, Less than 12 Months, Unrealized Losses	-18,030	-228
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	416,085	47,174
Securities Available For Sale, Unrealized Losses, Total	-18,030	-228
Number of held to maturity securities	19	'
Securities Held To Maturity, Less than 12 Months, Fair Value	274,423	'
Securities Held To Maturity, Less than 12 Months, Unrealized Losses	-12,788	'
Securities Held To Maturity, 12 Months or More, Fair Value	'	'
Securities Held To Maturity, 12 Months or More, Unrealized Losses	'	'
Securities Held To Maturity, Fair Value, Total	274,423	'
Securities Held To Maturity, Unrealized Losses, Total	-12,788	'
Agency Collateralized Mortgage Obligations [Member] \| Less than 12 Months [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of held to maturity securities	19	'
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	'
Number of available for sale securities, Greater than 1 year	'	'
Number of available for sale securities	2	'
Securities Available For Sale, Less than 12 Months, Fair Value	3,134	'
Securities Available For Sale, Less than 12 Months, Unrealized Losses	-139	'
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	3,134	'
Securities Available For Sale, Unrealized Losses, Total	-139	'
Number of held to maturity securities	25	'
Securities Held To Maturity, Less than 12 Months, Fair Value	28,327	'
Securities Held To Maturity, Less than 12 Months, Unrealized Losses	-1,667	'
Securities Held To Maturity, 12 Months or More, Fair Value	'	'
Securities Held To Maturity, 12 Months or More, Unrealized Losses	'	'
Securities Held To Maturity, Fair Value, Total	28,327	'
Securities Held To Maturity, Unrealized Losses, Total	-1,667	'
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	25	'
Collateralized Debt Obligations [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of available for sale securities, Less than 1 year	1	7
Number of available for sale securities, Greater than 1 year	9	9
Number of available for sale securities	10	16
Securities Available For Sale, Less than 12 Months, Fair Value	2,195	8,708
Securities Available For Sale, Less than 12 Months, Unrealized Losses	-3	-909
Securities Available For Sale, 12 Months or More, Fair Value	8,927	5,532
Securities Available For Sale, 12 Months or More, Unrealized Losses	-10,196	-12,367
Securities Available For Sale, Fair Value, Total	11,122	14,240
Securities Available For Sale, Unrealized Losses, Total	-10,199	-13,276
Number of held to maturity securities	'	1
Securities Held To Maturity, Less than 12 Months, Fair Value	'	'
Securities Held To Maturity, Less than 12 Months, Unrealized Losses	'	'
Securities Held To Maturity, 12 Months or More, Fair Value	'	477
Securities Held To Maturity, 12 Months or More, Unrealized Losses	'	-35
Securities Held To Maturity, Fair Value, Total	'	477
Securities Held To Maturity, Unrealized Losses, Total	'	-35
Collateralized Debt Obligations [Member] \| Greater than 12 Months [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of held to maturity securities	'	1
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	5,963	5,899
Securities Available For Sale, 12 Months or More, Unrealized Losses	-914	-972
Securities Available For Sale, Fair Value, Total	5,963	5,899
Securities Available For Sale, Unrealized Losses, Total	-914	-972
Equity 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	1	'
Number of available for sale securities	1	1
Securities Available For Sale, Less than 12 Months, Fair Value	'	654
Securities Available For Sale, Less than 12 Months, Unrealized Losses	'	-9
Securities Available For Sale, 12 Months or More, Fair Value	632	'
Securities Available For Sale, 12 Months or More, Unrealized Losses	-31	'
Securities Available For Sale, Fair Value, Total	632	654
Securities Available For Sale, Unrealized Losses, Total	-31	-9
Commercial Mortgage-Backed Securities [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of held to maturity securities	1	'
Securities Held To Maturity, Less than 12 Months, Fair Value	991	'
Securities Held To Maturity, Less than 12 Months, Unrealized Losses	-31	'
Securities Held To Maturity, 12 Months or More, Fair Value	'	'
Securities Held To Maturity, 12 Months or More, Unrealized Losses	'	'
Securities Held To Maturity, Fair Value, Total	991	'
Securities Held To Maturity, Unrealized Losses, Total	($31)	'
Commercial Mortgage-Backed Securities [Member] \| Less than 12 Months [Member]	'	'
Schedule Of Securities [Line Items]	'	'
Number of held to maturity securities	1	'

Securities_Summary_of_Cumulati

Securities - Summary of Cumulative Credit-Related OTTI Charges (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]	'	'
Beginning balance	$17,367	$18,398
Loss where impairment was not previously recognized	'	119
Additional loss where impairment was previously recognized	'	'
Reduction due to credit impaired securities sold	-212	-1,243
Ending balance	17,155	17,274
Collateralized Debt Obligations [Member]	'	'
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]	'	'
Beginning balance	17,155	18,369
Loss where impairment was not previously recognized	'	119
Additional loss where impairment was previously recognized	'	'
Reduction due to credit impaired securities sold	'	-1,214
Ending balance	17,155	17,274
Residential Non-Agency Collateralized Mortgage Obligations [Member]	'	'
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]	'	'
Beginning balance	212	29
Loss where impairment was not previously recognized	'	'
Additional loss where impairment was previously recognized	'	'
Reduction due to credit impaired securities sold	-212	-29
Ending balance	'	'

Securities_Trust_Preferred_Sec

Securities - Trust Preferred Securities (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
Schedule Of Securities [Line Items]	'
TPS, Current Par Value	$103,607
TPS, Amortized Cost	43,328
TPS, Fair Value	34,667
TPS, Unrealized Gain (Loss)	-8,661
TPS, Number of Issuers Currently Performing	876
Single Issuer TPS, Fair Value	5,963
Fair Value	28,704
Pooled TPS P1 [Member]	'
Schedule Of Securities [Line Items]	'
Current Par Value	5,500
Amortized Cost	2,571
Fair Value	1,511
Unrealized Gain (Loss)	-1,060
Number of Issuers Currently Performing	42
Actual Defaults (as a percent of original collateral)	22.00%
Actual Deferrals (as a percent of original collateral)	7.00%
Projected Recovery Rates on Current Deferrals	41.00%
Expected Defaults	18.00%
Class	'C1
Lowest Credit Ratings	'C
Excess Subordination (as a percent of current collateral)	0.00%
Pooled TPS P2 [Member]	'
Schedule Of Securities [Line Items]	'
Current Par Value	4,889
Amortized Cost	3,073
Fair Value	1,241
Unrealized Gain (Loss)	-1,832
Number of Issuers Currently Performing	41
Actual Defaults (as a percent of original collateral)	16.00%
Actual Deferrals (as a percent of original collateral)	15.00%
Projected Recovery Rates on Current Deferrals	41.00%
Expected Defaults	15.00%
Class	'C1
Lowest Credit Ratings	'C
Excess Subordination (as a percent of current collateral)	0.00%
Pooled TPS P3 [Member]	'
Schedule Of Securities [Line Items]	'
Current Par Value	5,561
Amortized Cost	4,357
Fair Value	1,668
Unrealized Gain (Loss)	-2,689
Number of Issuers Currently Performing	47
Actual Defaults (as a percent of original collateral)	13.00%
Actual Deferrals (as a percent of original collateral)	9.00%
Projected Recovery Rates on Current Deferrals	34.00%
Expected Defaults	16.00%
Class	'C1
Lowest Credit Ratings	'C
Excess Subordination (as a percent of current collateral)	0.00%
Pooled TPS P4 [Member]	'
Schedule Of Securities [Line Items]	'
Current Par Value	3,994
Amortized Cost	3,120
Fair Value	1,197
Unrealized Gain (Loss)	-1,923
Number of Issuers Currently Performing	52
Actual Defaults (as a percent of original collateral)	16.00%
Actual Deferrals (as a percent of original collateral)	6.00%
Projected Recovery Rates on Current Deferrals	42.00%
Expected Defaults	16.00%
Class	'C1
Lowest Credit Ratings	'C
Excess Subordination (as a percent of current collateral)	0.00%
Pooled TPS P5 [Member]	'
Schedule Of Securities [Line Items]	'
Current Par Value	2,000
Amortized Cost	765
Fair Value	364
Unrealized Gain (Loss)	-401
Number of Issuers Currently Performing	14
Actual Defaults (as a percent of original collateral)	29.00%
Actual Deferrals (as a percent of original collateral)	10.00%
Projected Recovery Rates on Current Deferrals	48.00%
Expected Defaults	11.00%
Class	'B3
Lowest Credit Ratings	'C
Excess Subordination (as a percent of current collateral)	0.00%
Pooled TPS P6 [Member]	'
Schedule Of Securities [Line Items]	'
Current Par Value	3,028
Amortized Cost	2,497
Fair Value	1,004
Unrealized Gain (Loss)	-1,493
Number of Issuers Currently Performing	50
Actual Defaults (as a percent of original collateral)	15.00%
Actual Deferrals (as a percent of original collateral)	19.00%
Projected Recovery Rates on Current Deferrals	51.00%
Expected Defaults	10.00%
Class	'B1
Lowest Credit Ratings	'C
Excess Subordination (as a percent of current collateral)	0.00%
Pooled TPS P7 [Member]	'
Schedule Of Securities [Line Items]	'
Current Par Value	5,048
Amortized Cost	828
Fair Value	875
Unrealized Gain (Loss)	47
Number of Issuers Currently Performing	36
Actual Defaults (as a percent of original collateral)	14.00%
Actual Deferrals (as a percent of original collateral)	22.00%
Projected Recovery Rates on Current Deferrals	37.00%
Expected Defaults	14.00%
Class	'C
Lowest Credit Ratings	'C
Excess Subordination (as a percent of current collateral)	0.00%
Pooled TPS P8 [Member]	'
Schedule Of Securities [Line Items]	'
Current Par Value	2,011
Amortized Cost	788
Fair Value	336
Unrealized Gain (Loss)	-452
Number of Issuers Currently Performing	44
Actual Defaults (as a percent of original collateral)	16.00%
Actual Deferrals (as a percent of original collateral)	11.00%
Projected Recovery Rates on Current Deferrals	36.00%
Expected Defaults	17.00%
Class	'C
Lowest Credit Ratings	'C
Excess Subordination (as a percent of current collateral)	0.42%
Pooled TPS P9 [Member]	'
Schedule Of Securities [Line Items]	'
Current Par Value	2,000
Amortized Cost	645
Fair Value	397
Unrealized Gain (Loss)	-248
Number of Issuers Currently Performing	24
Actual Defaults (as a percent of original collateral)	16.00%
Actual Deferrals (as a percent of original collateral)	13.00%
Projected Recovery Rates on Current Deferrals	43.00%
Expected Defaults	11.00%
Class	'A4L
Lowest Credit Ratings	'C
Excess Subordination (as a percent of current collateral)	0.00%
Total OTTI [Member]	'
Schedule Of Securities [Line Items]	'
Current Par Value	34,031
Amortized Cost	18,644
Fair Value	8,593
Unrealized Gain (Loss)	-10,051
Number of Issuers Currently Performing	350
Actual Defaults (as a percent of original collateral)	17.00%
Actual Deferrals (as a percent of original collateral)	12.00%
Projected Recovery Rates on Current Deferrals	41.00%
Expected Defaults	15.00%
Pooled TPS P10 [Member]	'
Schedule Of Securities [Line Items]	'
Current Par Value	5,220
Amortized Cost	1,077
Fair Value	1,434
Unrealized Gain (Loss)	357
Number of Issuers Currently Performing	42
Actual Defaults (as a percent of original collateral)	22.00%
Actual Deferrals (as a percent of original collateral)	7.00%
Projected Recovery Rates on Current Deferrals	41.00%
Expected Defaults	18.00%
Class	'C1
Lowest Credit Ratings	'C
Excess Subordination (as a percent of current collateral)	0.00%
Pooled TPS P11 [Member]	'
Schedule Of Securities [Line Items]	'
Current Par Value	5,000
Amortized Cost	2,198
Fair Value	2,195
Unrealized Gain (Loss)	-3
Number of Issuers Currently Performing	41
Actual Defaults (as a percent of original collateral)	16.00%
Actual Deferrals (as a percent of original collateral)	15.00%
Projected Recovery Rates on Current Deferrals	41.00%
Expected Defaults	15.00%
Class	'A2A
Lowest Credit Ratings	'B+
Excess Subordination (as a percent of current collateral)	47.85%
Pooled TPS P12 [Member]	'
Schedule Of Securities [Line Items]	'
Current Par Value	4,781
Amortized Cost	1,317
Fair Value	1,434
Unrealized Gain (Loss)	117
Number of Issuers Currently Performing	47
Actual Defaults (as a percent of original collateral)	13.00%
Actual Deferrals (as a percent of original collateral)	9.00%
Projected Recovery Rates on Current Deferrals	34.00%
Expected Defaults	16.00%
Class	'C1
Lowest Credit Ratings	'C
Excess Subordination (as a percent of current collateral)	0.00%
Pooled TPS P13 [Member]	'
Schedule Of Securities [Line Items]	'
Current Par Value	5,260
Amortized Cost	1,278
Fair Value	1,576
Unrealized Gain (Loss)	298
Number of Issuers Currently Performing	52
Actual Defaults (as a percent of original collateral)	16.00%
Actual Deferrals (as a percent of original collateral)	6.00%
Projected Recovery Rates on Current Deferrals	42.00%
Expected Defaults	16.00%
Class	'C1
Lowest Credit Ratings	'C
Excess Subordination (as a percent of current collateral)	0.00%
Pooled TPS P14 [Member]	'
Schedule Of Securities [Line Items]	'
Current Par Value	5,190
Amortized Cost	1,063
Fair Value	1,166
Unrealized Gain (Loss)	103
Number of Issuers Currently Performing	58
Actual Defaults (as a percent of original collateral)	15.00%
Actual Deferrals (as a percent of original collateral)	12.00%
Projected Recovery Rates on Current Deferrals	36.00%
Expected Defaults	17.00%
Class	'C1
Lowest Credit Ratings	'C
Excess Subordination (as a percent of current collateral)	0.00%
Pooled TPS P15 [Member]	'
Schedule Of Securities [Line Items]	'
Current Par Value	3,206
Amortized Cost	408
Fair Value	639
Unrealized Gain (Loss)	231
Number of Issuers Currently Performing	43
Actual Defaults (as a percent of original collateral)	19.00%
Actual Deferrals (as a percent of original collateral)	7.00%
Projected Recovery Rates on Current Deferrals	28.00%
Expected Defaults	16.00%
Class	'C1
Lowest Credit Ratings	'C
Excess Subordination (as a percent of current collateral)	0.00%
Pooled TPS P16 [Member]	'
Schedule Of Securities [Line Items]	'
Current Par Value	3,339
Amortized Cost	651
Fair Value	673
Unrealized Gain (Loss)	22
Number of Issuers Currently Performing	36
Actual Defaults (as a percent of original collateral)	15.00%
Actual Deferrals (as a percent of original collateral)	12.00%
Projected Recovery Rates on Current Deferrals	28.00%
Expected Defaults	15.00%
Class	'C
Lowest Credit Ratings	'C
Excess Subordination (as a percent of current collateral)	0.00%
Pooled TPS P17 [Member]	'
Schedule Of Securities [Line Items]	'
Current Par Value	2,069
Amortized Cost	672
Fair Value	673
Unrealized Gain (Loss)	1
Number of Issuers Currently Performing	32
Actual Defaults (as a percent of original collateral)	13.00%
Actual Deferrals (as a percent of original collateral)	21.00%
Projected Recovery Rates on Current Deferrals	40.00%
Expected Defaults	12.00%
Class	'B
Lowest Credit Ratings	'Ca
Excess Subordination (as a percent of current collateral)	18.75%
Pooled TPS P18 [Member]	'
Schedule Of Securities [Line Items]	'
Current Par Value	5,000
Amortized Cost	2,228
Fair Value	2,905
Unrealized Gain (Loss)	677
Number of Issuers Currently Performing	20
Actual Defaults (as a percent of original collateral)	0.00%
Actual Deferrals (as a percent of original collateral)	8.00%
Projected Recovery Rates on Current Deferrals	10.00%
Expected Defaults	15.00%
Class	'B2
Lowest Credit Ratings	'CCC
Excess Subordination (as a percent of current collateral)	37.52%
Pooled TPS P19 [Member]	'
Schedule Of Securities [Line Items]	'
Current Par Value	4,070
Amortized Cost	963
Fair Value	1,340
Unrealized Gain (Loss)	377
Number of Issuers Currently Performing	44
Actual Defaults (as a percent of original collateral)	16.00%
Actual Deferrals (as a percent of original collateral)	11.00%
Projected Recovery Rates on Current Deferrals	36.00%
Expected Defaults	17.00%
Class	'B
Lowest Credit Ratings	'C
Excess Subordination (as a percent of current collateral)	0.52%
Pooled TPS P20 [Member]	'
Schedule Of Securities [Line Items]	'
Current Par Value	3,304
Amortized Cost	1,983
Fair Value	2,037
Unrealized Gain (Loss)	54
Number of Issuers Currently Performing	46
Actual Defaults (as a percent of original collateral)	21.00%
Actual Deferrals (as a percent of original collateral)	6.00%
Projected Recovery Rates on Current Deferrals	35.00%
Expected Defaults	15.00%
Class	'A1
Lowest Credit Ratings	'BB-
Excess Subordination (as a percent of current collateral)	54.24%
Pooled TPS P21 [Member]	'
Schedule Of Securities [Line Items]	'
Current Par Value	5,000
Amortized Cost	1,307
Fair Value	1,209
Unrealized Gain (Loss)	-98
Number of Issuers Currently Performing	15
Actual Defaults (as a percent of original collateral)	18.00%
Actual Deferrals (as a percent of original collateral)	6.00%
Projected Recovery Rates on Current Deferrals	49.00%
Expected Defaults	11.00%
Class	'B
Lowest Credit Ratings	'C
Excess Subordination (as a percent of current collateral)	0.00%
Pooled TPS P22 [Member]	'
Schedule Of Securities [Line Items]	'
Current Par Value	5,531
Amortized Cost	1,386
Fair Value	1,399
Unrealized Gain (Loss)	13
Number of Issuers Currently Performing	23
Actual Defaults (as a percent of original collateral)	15.00%
Actual Deferrals (as a percent of original collateral)	12.00%
Projected Recovery Rates on Current Deferrals	42.00%
Expected Defaults	11.00%
Class	'C1
Lowest Credit Ratings	'C
Excess Subordination (as a percent of current collateral)	0.00%
Pooled TPS P23 [Member]	'
Schedule Of Securities [Line Items]	'
Current Par Value	5,606
Amortized Cost	1,276
Fair Value	1,431
Unrealized Gain (Loss)	155
Number of Issuers Currently Performing	23
Actual Defaults (as a percent of original collateral)	16.00%
Actual Deferrals (as a percent of original collateral)	10.00%
Projected Recovery Rates on Current Deferrals	44.00%
Expected Defaults	11.00%
Class	'C1
Lowest Credit Ratings	'C
Excess Subordination (as a percent of current collateral)	0.00%
Total Not OTTI [Member]	'
Schedule Of Securities [Line Items]	'
Current Par Value	62,576
Amortized Cost	17,807
Fair Value	20,111
Unrealized Gain (Loss)	2,304
Number of Issuers Currently Performing	522
Actual Defaults (as a percent of original collateral)	16.00%
Actual Deferrals (as a percent of original collateral)	10.00%
Projected Recovery Rates on Current Deferrals	36.00%
Expected Defaults	15.00%
Total Pooled TPS [Member]	'
Schedule Of Securities [Line Items]	'
Current Par Value	96,607
Amortized Cost	36,451
Fair Value	28,704
Unrealized Gain (Loss)	-7,747
Number of Issuers Currently Performing	872
Actual Defaults (as a percent of original collateral)	16.00%
Actual Deferrals (as a percent of original collateral)	11.00%
Projected Recovery Rates on Current Deferrals	38.00%
Expected Defaults	15.00%
Single Issuer TPS S1 [Member]	'
Schedule Of Securities [Line Items]	'
Single Issuer TPS, Current Par Value	2,000
Single Issuer TPS, Amortized Cost	1,954
Single Issuer TPS, Fair Value	1,600
Single Issuer TPS, Unrealized Gain (Loss)	-354
Lowest Credit Ratings	'BB
Single Issuer TPS, Number of Issuers Currently Performing	1
Single Issuer TPS S2 [Member]	'
Schedule Of Securities [Line Items]	'
Single Issuer TPS, Current Par Value	2,000
Single Issuer TPS, Amortized Cost	1,924
Single Issuer TPS, Fair Value	1,620
Single Issuer TPS, Unrealized Gain (Loss)	-304
Lowest Credit Ratings	'BBB
Single Issuer TPS, Number of Issuers Currently Performing	1
Single Issuer TPS S3 [Member]	'
Schedule Of Securities [Line Items]	'
Single Issuer TPS, Current Par Value	2,000
Single Issuer TPS, Amortized Cost	2,000
Single Issuer TPS, Fair Value	1,943
Single Issuer TPS, Unrealized Gain (Loss)	-57
Lowest Credit Ratings	'B+
Single Issuer TPS, Number of Issuers Currently Performing	1
Single Issuer TPS S4 [Member]	'
Schedule Of Securities [Line Items]	'
Single Issuer TPS, Current Par Value	1,000
Single Issuer TPS, Amortized Cost	999
Single Issuer TPS, Fair Value	800
Single Issuer TPS, Unrealized Gain (Loss)	-199
Lowest Credit Ratings	'BB
Single Issuer TPS, Number of Issuers Currently Performing	1
Single Issuer TPS [Member]	'
Schedule Of Securities [Line Items]	'
Single Issuer TPS, Current Par Value	7,000
Single Issuer TPS, Amortized Cost	6,877
Single Issuer TPS, Fair Value	5,963
Single Issuer TPS, Unrealized Gain (Loss)	($914)
Single Issuer TPS, Number of Issuers Currently Performing	4

Securities_Trust_Preferred_Sec1

Securities - Trust Preferred Securities (Parenthetical) (Detail)	Sep. 30, 2013
Minimum [Member]	'
Schedule Of Securities [Line Items]	'
Deferral rate after five years	10.00%
Maximum [Member]	'
Schedule Of Securities [Line Items]	'
Deferral rate after five years	90.00%

Federal_Home_Loan_Bank_Stock_A

Federal Home Loan Bank Stock - Additional Information (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]	'	'
Federal Home Loan Bank stock	$21,636	$24,560

Recovered_Sheet1

Loans and Allowance for Loan Losses - Summary of Loans, Net of Unearned Income (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	$8,836,905	$8,137,719
Commercial Real Estate [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	2,920,808	2,707,046
Commercial and Industrial [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	1,755,235	1,602,314
Commercial Leases [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	141,714	130,133
Commercial Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	4,817,757	4,439,493
Direct Installment [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	1,408,539	1,178,530
Residential Mortgages [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	1,031,805	1,092,228
Indirect Installment [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	638,312	582,037
Consumer Lines of Credit [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	887,981	805,494
Other [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	52,511	39,937
Originated Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	7,887,235	7,237,391
Originated Loans [Member] \| Commercial Real Estate [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	2,548,278	2,448,471
Originated Loans [Member] \| Commercial and Industrial [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	1,689,467	1,555,301
Originated Loans [Member] \| Commercial Leases [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	141,714	130,133
Originated Loans [Member] \| Commercial Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	4,379,459	4,133,905
Originated Loans [Member] \| Direct Installment [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	1,349,804	1,108,865
Originated Loans [Member] \| Residential Mortgages [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	669,978	653,826
Originated Loans [Member] \| Indirect Installment [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	631,030	568,324
Originated Loans [Member] \| Consumer Lines of Credit [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	804,453	732,534
Originated Loans [Member] \| Other [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	52,511	39,937
Acquired Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	949,670	900,328
Acquired Loans [Member] \| Commercial Real Estate [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	372,530	258,575
Acquired Loans [Member] \| Commercial and Industrial [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	65,768	47,013
Acquired Loans [Member] \| Commercial Leases [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	'	'
Acquired Loans [Member] \| Commercial Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	438,298	305,588
Acquired Loans [Member] \| Direct Installment [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	58,735	69,665
Acquired Loans [Member] \| Residential Mortgages [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	361,827	438,402
Acquired Loans [Member] \| Indirect Installment [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	7,282	13,713
Acquired Loans [Member] \| Consumer Lines of Credit [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, net of unearned income	83,528	72,960
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 $)	9 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans, net of unearned income	$8,836,905	'	$8,137,719
Outstanding contractual balance receivable of acquired loans	1,011,890	'	949,862
Commercial construction loans	215,433	'	190,206
Payoffs received on loans in excess of expected cash flows	440	'	3,539
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	14,424	'	'
Allowance for loan losses	4,716	'	4,180
Restructured loans returned to performing status	1,737	'	'
Specific reserves in allowance for loan losses, TDRs	756	'	41
Pooled reserves in allowance for loan losses, TDRs	108	'	297
Valuation for impairment of loans with pooled reserves	500	'	500
Pooled reserves for all other classes of loans	1,096	'	1,455
Acquired Loans [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans, net of unearned income	944,954	'	896,148
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 Mortgage Loans [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Threshold period past due for default non-accrual status of trade accounts receivable	'180 days	'	'
Commercial Real Estate [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Allowance for loan losses	1,443	'	1,955
Commercial and Industrial [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Allowance for loan losses	1,023	'	1,140
Direct Installment [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Allowance for loan losses	916	'	657
Residential Mortgages [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Allowance for loan losses	1,039	'	69
Indirect Installment [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Allowance for loan losses	295	'	359
Purchased Credit-Impaired Loans [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Carrying Amount	16,559	'	15,864
Outstanding contractual receivable of PCI loan	43,767	'	41,134
Recorded Investment	17,221	'	16,623
Owner-Occupied [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Percentage of commercial real estate loans	45.20%	'	46.50%
Non-Owner-Occupied [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Percentage of commercial real estate loans	54.80%	'	53.50%
Commercial Construction Loans [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Percentage of loan portfolio	2.40%	'	2.30%
Commercial Real Estate in Florida [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Commercial real estate loans	49,189	'	68,627
Percentage of loan portfolio	0.60%	'	0.80%
Consumer Finance [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Percentage of loan portfolio	2.00%	'	2.10%
Consumer loans	$175,123	'	$170,999

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) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Annapolis Bancorp, Inc. [Member]	Parkvale Financial Corporation [Member]	Acquired Impaired Loans [Member]	Acquired Impaired Loans [Member]	Acquired Performing Loans [Member]	Acquired Performing Loans [Member]
			Annapolis Bancorp, Inc. [Member]	Parkvale Financial Corporation [Member]	Annapolis Bancorp, Inc. [Member]	Parkvale Financial Corporation [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]	'	'	'	'	'	'
Contractually required cash flows at acquisition	$282,397	$1,339,566	$12,200	$12,224	$270,197	$1,327,342
Non-accretable difference (expected losses and foregone interest)	-21,534	-220,611	-7,829	-6,070	-13,705	-214,541
Cash flows expected to be collected at acquisition	260,863	1,118,955	4,371	6,154	256,492	1,112,801
Accretable yield	-41,730	-294,183	-523	-589	-41,207	-293,594
Basis in acquired loans at acquisition	$219,133	$824,772	$3,848	$5,565	$215,285	$819,207

Loans_and_Allowance_for_Loan_L3

Loans and Allowance for Loan Losses - Summary of Change in Accretable Yield of Acquired Loans (Detail) (USD $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]	'	'
Balance at beginning of period	$254,153	$51,706
Acquisitions	41,730	294,183
Reduction due to unexpected early payoffs	-37,432	-57,840
Reclass from non-accretable difference	7,873	14,454
Disposals/transfers	-46	-664
Accretion	-29,879	-47,686
Balance at end of period	236,399	254,153
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	778	2,477
Acquisitions	523	589
Reclass from non-accretable difference	6,318	3,539
Disposals/transfers	164	-49
Accretion	-2,250	-5,778
Balance at end of period	5,533	778
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	253,375	49,229
Acquisitions	41,207	293,594
Reduction due to unexpected early payoffs	-37,432	-57,840
Reclass from non-accretable difference	1,555	10,915
Disposals/transfers	-210	-615
Accretion	-27,629	-41,908
Balance at end of period	$230,866	$253,375

Loans_and_Allowance_for_Loan_L4

Loans and Allowance for Loan Losses - Summary of Purchased Credit-Impaired Loans, Information Identified in Corporation's Acquisition of ANNB and Parkvale (Detail) (USD $)	Dec. 31, 2012	Jan. 02, 2012	Sep. 30, 2013	Apr. 06, 2013
In Thousands, unless otherwise specified	Parkvale Financial Corporation [Member]	Parkvale Financial Corporation [Member]	Annapolis Bancorp, Inc. [Member]	Annapolis Bancorp, Inc. [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]	'	'	'	'
Outstanding balance	$3,704	$9,135	$11,867	$12,220
Carrying amount	2,552	5,565	3,442	3,848
Allowance for loan losses	103	'	'	'
Impairment recognized since acquisition	103	'	'	'
Allowance reduction recognized since acquisition	'	'	'	'

Loans_and_Allowance_for_Loan_L5

Loans and Allowance for Loan Losses - Summary of Information about Corporation's Purchased Credit-Impaired Loans (Detail) (USD $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Balance at beginning of period, Accretable Yield	($254,153)	($51,706)
Accretion	29,879	47,686
Reclass from non-accretable difference	7,873	14,454
Disposals/transfers	-46	-664
Balance at end of period, Accretable Yield	-236,399	-254,153
Recorded Investment [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Balance at beginning of period	16,623	15,839
Acquisitions	3,848	5,565
Accretion	2,250	5,778
Payments received	-3,087	-9,556
Disposals/transfers	-2,413	-1,003
Balance at end of period	17,221	16,623
Accretable Yield [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Balance at beginning of period, Accretable Yield	-778	-2,477
Acquisitions, Accretable Yield	-523	-589
Accretion	2,250	5,778
Payments received, Accretable Yield	'	'
Reclass from non-accretable difference	-6,318	-3,539
Disposals/transfers	-164	49
Contractual interest	'	'
Balance at end of period, Accretable Yield	-5,533	-778
Expected Cash Flows [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Balance at beginning of period	17,401	18,316
Acquisitions	4,371	6,154
Accretion	'	'
Payments received	-3,087	-9,556
Reclass from non-accretable difference	6,318	3,539
Disposals/transfers	-2,249	-1,052
Contractual interest	'	'
Balance at end of period	22,754	17,401
Non-Accretable Difference [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Balance at beginning of period	-23,733	-33,377
Acquisitions	-7,849	-2,981
Accretion	'	'
Payments received	'	'
Reclass from non-accretable difference	6,318	3,539
Disposals/transfers	6,193	11,442
Contractual interest	-1,942	-2,356
Balance at end of period	-21,013	-23,733
Outstanding Balance [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Balance at beginning of period	41,134	51,693
Acquisitions	12,220	9,135
Accretion	'	'
Payments received	-3,087	-9,556
Reclass from non-accretable difference	'	'
Disposals/transfers	-8,442	-12,494
Contractual interest	1,942	2,356
Balance at end of period	$43,767	$41,134

Loans_and_Allowance_for_Loan_L6

Loans and Allowance for Loan Losses - Summary of Non-Performing Assets (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled debt restructurings	$39,539	$39,920
Non-Performing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Non-accrual loans	65,451	66,004
Troubled debt restructurings	17,252	14,876
Total non-performing loans	82,703	80,880
Other real estate owned (OREO)	35,144	35,257
Total non-performing loans and OREO	117,847	116,137
Non-performing investments	733	2,809
Total non-performing assets	$118,580	$118,946
Non-performing loans as a percent of total loans	0.94%	0.99%
Non-performing loans + OREO as a percent of total loans + OREO	1.33%	1.42%
Non-performing assets as a percent of total assets	0.93%	0.99%

Loans_and_Allowance_for_Loan_L7

Loans and Allowance for Loan Losses - Age Analysis of Past Due Loans, by Class (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Loans	$8,836,905	$8,137,719
Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Loans	2,920,808	2,707,046
Commercial and Industrial [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Loans	1,755,235	1,602,314
Commercial Leases [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Loans	141,714	130,133
Commercial Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Loans	4,817,757	4,439,493
Direct Installment [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Loans	1,408,539	1,178,530
Residential Mortgages [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Loans	1,031,805	1,092,228
Indirect Installment [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Loans	638,312	582,037
Consumer Lines of Credit [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Loans	887,981	805,494
Other [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total Loans	52,511	39,937
Originated Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	41,212	46,205
> 90 Days Past Due and Still Accruing	7,018	6,707
Non- Accrual	65,451	66,004
Total Past Due	113,681	118,916
Current	7,773,554	7,118,475
Total Loans	7,887,235	7,237,391
Originated Loans [Member] \| Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	7,041	5,786
> 90 Days Past Due and Still Accruing	301	533
Non- Accrual	47,151	47,895
Total Past Due	54,493	54,214
Current	2,493,785	2,394,257
Total Loans	2,548,278	2,448,471
Originated Loans [Member] \| Commercial and Industrial [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	4,068	7,310
> 90 Days Past Due and Still Accruing	459	456
Non- Accrual	8,081	6,017
Total Past Due	12,608	13,783
Current	1,676,859	1,541,518
Total Loans	1,689,467	1,555,301
Originated Loans [Member] \| Commercial Leases [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	836	1,671
Non- Accrual	782	965
Total Past Due	1,618	2,636
Current	140,096	127,497
Total Loans	141,714	130,133
Originated Loans [Member] \| Commercial Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	11,945	14,767
> 90 Days Past Due and Still Accruing	760	989
Non- Accrual	56,014	54,877
Total Past Due	68,719	70,633
Current	4,310,740	4,063,272
Total Loans	4,379,459	4,133,905
Originated Loans [Member] \| Direct Installment [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	9,952	8,834
> 90 Days Past Due and Still Accruing	2,515	2,717
Non- Accrual	4,462	3,342
Total Past Due	16,929	14,893
Current	1,332,875	1,093,972
Total Loans	1,349,804	1,108,865
Originated Loans [Member] \| Residential Mortgages [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	12,331	15,821
> 90 Days Past Due and Still Accruing	1,986	2,365
Non- Accrual	3,694	2,891
Total Past Due	18,011	21,077
Current	651,967	632,749
Total Loans	669,978	653,826
Originated Loans [Member] \| Indirect Installment [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	4,815	5,114
> 90 Days Past Due and Still Accruing	607	374
Non- Accrual	975	1,039
Total Past Due	6,397	6,527
Current	624,633	561,797
Total Loans	631,030	568,324
Originated Loans [Member] \| Consumer Lines of Credit [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	2,146	1,633
> 90 Days Past Due and Still Accruing	1,113	247
Non- Accrual	306	355
Total Past Due	3,565	2,235
Current	800,888	730,299
Total Loans	804,453	732,534
Originated Loans [Member] \| Other [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	23	36
> 90 Days Past Due and Still Accruing	37	15
Non- Accrual	'	3,500
Total Past Due	60	3,551
Current	52,451	36,386
Total Loans	52,511	39,937
Acquired Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	16,968	22,799
> 90 Days Past Due and Still Accruing	41,458	36,585
Non- Accrual	'	'
Total Past Due	58,426	59,384
Current	953,464	890,478
Discount	-62,220	-49,534
Total Loans	949,670	900,328
Acquired Loans [Member] \| Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	4,681	6,829
> 90 Days Past Due and Still Accruing	16,002	13,597
Non- Accrual	'	'
Total Past Due	20,683	20,426
Current	370,373	250,116
Discount	-18,526	-11,967
Total Loans	372,530	258,575
Acquired Loans [Member] \| Commercial and Industrial [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	3,396	1,653
> 90 Days Past Due and Still Accruing	4,500	138
Non- Accrual	'	'
Total Past Due	7,896	1,791
Current	63,566	47,351
Discount	-5,694	-2,129
Total Loans	65,768	47,013
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	'	'
Discount	'	'
Total Loans	'	'
Acquired Loans [Member] \| Commercial Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	8,077	8,482
> 90 Days Past Due and Still Accruing	20,502	13,735
Non- Accrual	'	'
Total Past Due	28,579	22,217
Current	433,939	297,467
Discount	-24,220	-14,096
Total Loans	438,298	305,588
Acquired Loans [Member] \| Direct Installment [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	1,147	1,454
> 90 Days Past Due and Still Accruing	1,023	947
Non- Accrual	'	'
Total Past Due	2,170	2,401
Current	53,785	63,502
Discount	2,780	3,762
Total Loans	58,735	69,665
Acquired Loans [Member] \| Residential Mortgages [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	7,272	12,137
> 90 Days Past Due and Still Accruing	19,002	21,069
Non- Accrual	'	'
Total Past Due	26,274	33,206
Current	370,609	439,620
Discount	-35,056	-34,424
Total Loans	361,827	438,402
Acquired Loans [Member] \| Indirect Installment [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	246	347
> 90 Days Past Due and Still Accruing	38	56
Non- Accrual	'	'
Total Past Due	284	403
Current	7,661	14,089
Discount	-663	-779
Total Loans	7,282	13,713
Acquired Loans [Member] \| Consumer Lines of Credit [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-89 Days Past Due	226	379
> 90 Days Past Due and Still Accruing	893	778
Non- Accrual	'	'
Total Past Due	1,119	1,157
Current	87,470	75,800
Discount	-5,061	-3,997
Total Loans	83,528	72,960
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	'	'
Discount	'	'
Total Loans	'	'

Loans_and_Allowance_for_Loan_L8

Loans and Allowance for Loan Losses - Summary of Commercial Loans by Credit Quality (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Originated Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	$4,379,459	$4,133,905
Originated Loans [Member] \| Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	2,548,278	2,448,471
Originated Loans [Member] \| Commercial and Industrial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	1,689,467	1,555,301
Originated Loans [Member] \| Commercial Leases [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	141,714	130,133
Acquired Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	438,298	305,588
Acquired Loans [Member] \| Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	372,530	258,575
Acquired Loans [Member] \| Commercial and Industrial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	65,768	47,013
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	4,078,565	3,881,020
Pass [Member] \| Originated Loans [Member] \| Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	2,388,404	2,282,139
Pass [Member] \| Originated Loans [Member] \| Commercial and Industrial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	1,550,195	1,472,598
Pass [Member] \| Originated Loans [Member] \| Commercial Leases [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	139,966	126,283
Pass [Member] \| Acquired Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	326,911	243,896
Pass [Member] \| Acquired Loans [Member] \| Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	277,806	204,300
Pass [Member] \| Acquired Loans [Member] \| Commercial and Industrial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	49,105	39,596
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	128,501	90,408
Special Mention [Member] \| Originated Loans [Member] \| Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	46,750	57,938
Special Mention [Member] \| Originated Loans [Member] \| Commercial and Industrial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	80,987	32,227
Special Mention [Member] \| Originated Loans [Member] \| Commercial Leases [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	764	243
Special Mention [Member] \| Acquired Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	52,730	18,324
Special Mention [Member] \| Acquired Loans [Member] \| Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	47,663	14,713
Special Mention [Member] \| Acquired Loans [Member] \| Commercial and Industrial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	5,067	3,611
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	169,292	159,679
Substandard [Member] \| Originated Loans [Member] \| Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	110,342	106,258
Substandard [Member] \| Originated Loans [Member] \| Commercial and Industrial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	57,966	49,814
Substandard [Member] \| Originated Loans [Member] \| Commercial Leases [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	984	3,607
Substandard [Member] \| Acquired Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	57,255	42,897
Substandard [Member] \| Acquired Loans [Member] \| Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	45,673	39,093
Substandard [Member] \| Acquired Loans [Member] \| Commercial and Industrial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	11,582	3,804
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	3,101	2,798
Doubtful [Member] \| Originated Loans [Member] \| Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	2,782	2,136
Doubtful [Member] \| Originated Loans [Member] \| Commercial and Industrial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	319	662
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	1,402	471
Doubtful [Member] \| Acquired Loans [Member] \| Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	1,388	469
Doubtful [Member] \| Acquired Loans [Member] \| Commercial and Industrial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	14	2
Doubtful [Member] \| Acquired Loans [Member] \| Commercial Leases [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total commercial loans and leases	'	'

Loans_and_Allowance_for_Loan_L9

Loans and Allowance for Loan Losses - Summary of Consumer Loans by Payment Status (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Credit Quality [Line Items]	'	'
Loans, net of unearned income	$8,836,905	$8,137,719
Non-Performing [Member]	'	'
Credit Quality [Line Items]	'	'
Non-Performing Loans	82,703	80,880
Direct Installment [Member]	'	'
Credit Quality [Line Items]	'	'
Loans, net of unearned income	1,408,539	1,178,530
Direct Installment [Member] \| Performing [Member]	'	'
Credit Quality [Line Items]	'	'
Performing Loans	1,339,139	1,100,324
Direct Installment [Member] \| Non-Performing [Member]	'	'
Credit Quality [Line Items]	'	'
Non-Performing Loans	10,665	8,541
Residential Mortgages [Member]	'	'
Credit Quality [Line Items]	'	'
Loans, net of unearned income	1,031,805	1,092,228
Residential Mortgages [Member] \| Performing [Member]	'	'
Credit Quality [Line Items]	'	'
Performing Loans	656,674	642,406
Residential Mortgages [Member] \| Non-Performing [Member]	'	'
Credit Quality [Line Items]	'	'
Non-Performing Loans	13,304	11,420
Indirect Installment [Member]	'	'
Credit Quality [Line Items]	'	'
Loans, net of unearned income	638,312	582,037
Indirect Installment [Member] \| Performing [Member]	'	'
Credit Quality [Line Items]	'	'
Performing Loans	629,838	567,192
Indirect Installment [Member] \| Non-Performing [Member]	'	'
Credit Quality [Line Items]	'	'
Non-Performing Loans	1,092	1,132
Consumer Lines of Credit [Member]	'	'
Credit Quality [Line Items]	'	'
Loans, net of unearned income	887,981	805,494
Consumer Lines of Credit [Member] \| Performing [Member]	'	'
Credit Quality [Line Items]	'	'
Performing Loans	803,904	731,788
Consumer Lines of Credit [Member] \| Non-Performing [Member]	'	'
Credit Quality [Line Items]	'	'
Non-Performing Loans	549	746
Other [Member]	'	'
Credit Quality [Line Items]	'	'
Loans, net of unearned income	52,511	39,937
Other [Member] \| Performing [Member]	'	'
Credit Quality [Line Items]	'	'
Performing Loans	52,511	36,437
Other [Member] \| Non-Performing [Member]	'	'
Credit Quality [Line Items]	'	'
Non-Performing Loans	'	3,500
Originated Loans [Member] \| Direct Installment [Member]	'	'
Credit Quality [Line Items]	'	'
Loans, net of unearned income	1,349,804	1,108,865
Originated Loans [Member] \| Residential Mortgages [Member]	'	'
Credit Quality [Line Items]	'	'
Loans, net of unearned income	669,978	653,826
Originated Loans [Member] \| Indirect Installment [Member]	'	'
Credit Quality [Line Items]	'	'
Loans, net of unearned income	631,030	568,324
Originated Loans [Member] \| Consumer Lines of Credit [Member]	'	'
Credit Quality [Line Items]	'	'
Loans, net of unearned income	804,453	732,534
Originated Loans [Member] \| Other [Member]	'	'
Credit Quality [Line Items]	'	'
Loans, net of unearned income	$52,511	$39,937

Recovered_Sheet3

Loans and Allowance for Loan Losses - Summary of Impaired Loans, by Class (Detail) (USD $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Financial Receivables Impaired Or Restructured [Line Items]	'	'
Recorded Investment	$14,424	'
Specific Related Allowance	2,906	'
Commercial Real Estate [Member]	'	'
Financial Receivables Impaired Or Restructured [Line Items]	'	'
With allowance recorded, Recorded Investment	14,300	12,623
With allowance recorded, Unpaid Principal Balance	23,748	21,877
With allowance recorded, Specific Related Allowance	2,782	2,136
With allowance recorded, Average Recorded Investment	14,379	14,522
With no allowance recorded, Recorded Investment	34,281	37,119
With no allowance recorded, Unpaid Principal Balance	46,548	50,234
With no allowance recorded, Specific Related Allowance	'	'
With no allowance recorded, Average Recorded Investment	34,165	36,426
Recorded Investment	48,581	49,742
Unpaid Principal Balance	70,296	72,111
Specific Related Allowance	2,782	2,136
Average Recorded Investment	48,544	50,948
Commercial and Industrial [Member]	'	'
Financial Receivables Impaired Or Restructured [Line Items]	'	'
With allowance recorded, Recorded Investment	124	590
With allowance recorded, Unpaid Principal Balance	131	590
With allowance recorded, Specific Related Allowance	124	590
With allowance recorded, Average Recorded Investment	126	592
With no allowance recorded, Recorded Investment	9,308	7,074
With no allowance recorded, Unpaid Principal Balance	11,377	9,597
With no allowance recorded, Average Recorded Investment	9,448	6,992
Recorded Investment	9,432	7,664
Unpaid Principal Balance	11,508	10,187
Specific Related Allowance	124	590
Average Recorded Investment	9,574	7,584
Commercial Leases [Member]	'	'
Financial Receivables Impaired Or Restructured [Line Items]	'	'
With no allowance recorded, Recorded Investment	782	965
With no allowance recorded, Unpaid Principal Balance	782	'
With no allowance recorded, Average Recorded Investment	729	1,053
Recorded Investment	782	965
Unpaid Principal Balance	782	'
Average Recorded Investment	729	1,053
Commercial Loans [Member]	'	'
Financial Receivables Impaired Or Restructured [Line Items]	'	'
With allowance recorded, Recorded Investment	14,424	13,213
With allowance recorded, Unpaid Principal Balance	23,879	22,467
With allowance recorded, Specific Related Allowance	2,906	2,726
With allowance recorded, Average Recorded Investment	14,505	15,114
With no allowance recorded, Recorded Investment	44,371	45,158
With no allowance recorded, Unpaid Principal Balance	58,707	59,831
With no allowance recorded, Average Recorded Investment	44,342	44,471
Recorded Investment	58,795	58,371
Unpaid Principal Balance	82,586	82,298
Specific Related Allowance	2,906	2,726
Average Recorded Investment	58,847	59,585
Direct Installment [Member]	'	'
Financial Receivables Impaired Or Restructured [Line Items]	'	'
With no allowance recorded, Recorded Investment	10,665	8,541
With no allowance recorded, Unpaid Principal Balance	10,901	8,693
With no allowance recorded, Average Recorded Investment	10,451	6,443
Recorded Investment	10,665	8,541
Unpaid Principal Balance	10,901	8,693
Average Recorded Investment	10,451	6,443
Residential Mortgages [Member]	'	'
Financial Receivables Impaired Or Restructured [Line Items]	'	'
With no allowance recorded, Recorded Investment	13,298	11,414
With no allowance recorded, Unpaid Principal Balance	13,561	11,223
With no allowance recorded, Average Recorded Investment	13,767	9,059
Recorded Investment	13,298	11,414
Unpaid Principal Balance	13,561	11,223
Average Recorded Investment	13,767	9,059
Indirect Installment [Member]	'	'
Financial Receivables Impaired Or Restructured [Line Items]	'	'
With no allowance recorded, Recorded Investment	1,092	1,132
With no allowance recorded, Unpaid Principal Balance	2,491	2,381
With no allowance recorded, Average Recorded Investment	1,169	1,133
Recorded Investment	1,092	1,132
Unpaid Principal Balance	2,491	2,381
Average Recorded Investment	1,169	1,133
Consumer Lines of Credit [Member]	'	'
Financial Receivables Impaired Or Restructured [Line Items]	'	'
With no allowance recorded, Recorded Investment	549	746
With no allowance recorded, Unpaid Principal Balance	609	792
With no allowance recorded, Average Recorded Investment	631	591
Recorded Investment	549	746
Unpaid Principal Balance	609	792
Average Recorded Investment	631	591
Other [Member]	'	'
Financial Receivables Impaired Or Restructured [Line Items]	'	'
With no allowance recorded, Recorded Investment	'	3,500
With no allowance recorded, Unpaid Principal Balance	'	3,500
With no allowance recorded, Average Recorded Investment	583	3,500
Recorded Investment	'	3,500
Unpaid Principal Balance	'	3,500
Average Recorded Investment	$583	$3,500

Recovered_Sheet4

Loans and Allowance for Loan Losses - Summary of Composition of Total TDRs (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Financing Receivable, Modifications [Line Items]	'	'
Troubled debt restructurings ("TDRs")	$39,539	$39,920
Performing [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled debt restructurings ("TDRs")	10,102	12,659
Non-Performing [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled debt restructurings ("TDRs")	17,252	14,876
Non-Accrual [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled debt restructurings ("TDRs")	$12,185	$12,385

Recovered_Sheet5

Loans and Allowance for Loan Losses - Summary of Troubled Debt Restructurings by Class of Loans (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
	Contract	Contract	Contract	Contract
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	134	88	380	312
Pre-Modification Outstanding Recorded Investment	$1,783	$3,437	$6,438	$6,387
Post-Modification Outstanding Recorded Investment	1,747	3,550	6,033	7,019
Commercial Real Estate [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	2	13	7	16
Pre-Modification Outstanding Recorded Investment	212	2,183	1,252	2,341
Post-Modification Outstanding Recorded Investment	207	2,245	1,031	2,971
Commercial and Industrial [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	'	4	'	7
Pre-Modification Outstanding Recorded Investment	'	51	'	254
Post-Modification Outstanding Recorded Investment	'	48	'	123
Commercial Loans [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	2	17	7	23
Pre-Modification Outstanding Recorded Investment	212	2,234	1,252	2,595
Post-Modification Outstanding Recorded Investment	207	2,293	1,031	3,094
Direct Installment [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	117	50	300	229
Pre-Modification Outstanding Recorded Investment	1,199	237	3,078	1,597
Post-Modification Outstanding Recorded Investment	1,168	228	2,930	1,557
Residential Mortgages [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	9	15	39	39
Pre-Modification Outstanding Recorded Investment	346	934	1,809	2,085
Post-Modification Outstanding Recorded Investment	348	996	1,784	2,266
Indirect Installment [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	5	4	20	17
Pre-Modification Outstanding Recorded Investment	20	30	92	105
Post-Modification Outstanding Recorded Investment	18	30	84	97
Consumer Lines of Credit [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	1	2	14	4
Pre-Modification Outstanding Recorded Investment	6	2	207	5
Post-Modification Outstanding Recorded Investment	$6	$3	$204	$5

Recovered_Sheet6

Loans and Allowance for Loan Losses - Summary of Troubled Debt Restructurings by Class of Loans, Payment Default (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
	Contract	Contract	Contract	Contract
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	27	24	65	33
Recorded Investment	$438	$169	$1,637	$381
Commercial Real Estate [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	'	'	1	'
Recorded Investment	'	'	751	'
Commercial and Industrial [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	'	'	1	'
Recorded Investment	'	'	15	'
Commercial Leases [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	'	'	'	'
Recorded Investment	'	'	'	'
Commercial Loans [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	'	'	2	'
Recorded Investment	'	'	766	'
Direct Installment [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	24	21	53	27
Recorded Investment	254	138	509	165
Residential Mortgages [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	2	1	5	3
Recorded Investment	99	25	240	208
Indirect Installment [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	'	2	4	3
Recorded Investment	'	6	37	8
Consumer Lines of Credit [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	1	'	1	'
Recorded Investment	85	'	85	'
Other [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Contracts	'	'	'	'
Recorded Investment	'	'	'	'

Recovered_Sheet7

Loans and Allowance for Loan Losses - Summary of Changes in Allowance for Loan Losses by Class (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Balance at Beginning of Period	$108,280	$101,647	$104,374	$100,662
Charge- Offs	-5,844	-9,220	-20,811	-23,563
Recoveries	336	1,858	3,765	3,587
Net Charge- Offs	-5,508	-7,362	-17,046	-19,976
Provision for loan losses	7,280	8,429	22,724	22,028
Balance at End of Period	110,052	102,714	110,052	102,714
Commercial Real Estate [Member]	'	'	'	'
Balance at Beginning of Period	35,666	38,480	34,810	43,283
Charge- Offs	-365	-1,481	-3,067	-4,733
Recoveries	80	1,375	1,606	1,634
Net Charge- Offs	-285	-106	-1,461	-3,099
Provision for loan losses	-538	-3,360	1,494	-5,170
Balance at End of Period	34,843	35,014	34,843	35,014
Commercial and Industrial [Member]	'	'	'	'
Balance at Beginning of Period	32,486	30,779	31,849	25,476
Charge- Offs	-1,529	-3,746	-4,262	-7,086
Recoveries	231	-19	734	349
Net Charge- Offs	-1,298	-3,765	-3,528	-6,737
Provision for loan losses	1,460	4,861	4,327	13,136
Balance at End of Period	32,648	31,875	32,648	31,875
Commercial Leases [Member]	'	'	'	'
Balance at Beginning of Period	1,756	1,674	1,744	1,556
Charge- Offs	-69	-216	-317	-509
Recoveries	59	78	161	177
Net Charge- Offs	-10	-138	-156	-332
Provision for loan losses	21	214	179	526
Balance at End of Period	1,767	1,750	1,767	1,750
Commercial Loans [Member]	'	'	'	'
Balance at Beginning of Period	69,908	70,933	68,403	70,315
Charge- Offs	-1,963	-5,443	-7,646	-12,328
Recoveries	370	1,434	2,501	2,160
Net Charge- Offs	-1,593	-4,009	-5,145	-10,168
Provision for loan losses	943	1,715	6,000	8,492
Balance at End of Period	69,258	68,639	69,258	68,639
Direct Installment [Member]	'	'	'	'
Balance at Beginning of Period	15,993	14,536	15,130	14,814
Charge- Offs	-2,183	-1,985	-6,824	-5,908
Recoveries	227	225	709	721
Net Charge- Offs	-1,956	-1,760	-6,115	-5,187
Provision for loan losses	3,194	1,929	8,216	5,078
Balance at End of Period	17,231	14,705	17,231	14,705
Residential Mortgages [Member]	'	'	'	'
Balance at Beginning of Period	5,120	4,259	5,155	4,437
Charge- Offs	-174	-3	-733	-644
Recoveries	50	4	90	127
Net Charge- Offs	-124	1	-643	-517
Provision for loan losses	437	256	921	596
Balance at End of Period	5,433	4,516	5,433	4,516
Indirect Installment [Member]	'	'	'	'
Balance at Beginning of Period	5,626	5,666	5,449	5,503
Charge- Offs	-807	-688	-2,349	-2,128
Recoveries	188	158	576	433
Net Charge- Offs	-619	-530	-1,773	-1,695
Provision for loan losses	1,120	539	2,451	1,867
Balance at End of Period	6,127	5,675	6,127	5,675
Consumer Lines of Credit [Member]	'	'	'	'
Balance at Beginning of Period	6,421	5,266	6,057	5,447
Charge- Offs	-454	-831	-1,183	-1,585
Recoveries	60	37	209	146
Net Charge- Offs	-394	-794	-974	-1,439
Provision for loan losses	1,052	1,556	1,996	2,020
Balance at End of Period	7,079	6,028	7,079	6,028
Other [Member]	'	'	'	'
Balance at Beginning of Period	-219	203	'	146
Charge- Offs	-333	-270	-721	-716
Recoveries	'	'	'	'
Net Charge- Offs	-333	-270	-721	-716
Provision for loan losses	760	229	929	732
Balance at End of Period	208	162	208	162
Originated Loans [Member]	'	'	'	'
Balance at Beginning of Period	102,849	100,863	100,194	100,662
Charge- Offs	-5,914	-9,220	-19,456	-23,309
Recoveries	895	1,858	4,085	3,587
Net Charge- Offs	-5,019	-7,362	-15,371	-19,722
Provision for loan losses	7,506	6,224	20,513	18,785
Balance at End of Period	105,336	99,725	105,336	99,725
Purchased Credit-Impaired Loans [Member]	'	'	'	'
Balance at Beginning of Period	325	784	759	'
Charge- Offs	'	'	-156	-254
Recoveries	'	'	'	'
Net Charge- Offs	'	'	-156	-254
Provision for loan losses	337	2,205	59	3,243
Balance at End of Period	662	2,989	662	2,989
Other Acquired Loans [Member]	'	'	'	'
Balance at Beginning of Period	5,106	'	3,421	'
Charge- Offs	70	'	-1,199	'
Recoveries	-559	'	-320	'
Net Charge- Offs	-489	'	-1,519	'
Provision for loan losses	-563	'	2,152	'
Balance at End of Period	4,054	'	4,054	'
Acquired Loans [Member]	'	'	'	'
Balance at Beginning of Period	5,431	784	4,180	'
Charge- Offs	70	'	-1,355	-254
Recoveries	-559	'	-320	'
Net Charge- Offs	-489	'	-1,675	-254
Provision for loan losses	-226	2,205	2,211	3,243
Balance at End of Period	$4,716	$2,989	$4,716	$2,989

Recovered_Sheet8

Loans and Allowance for Loan Losses - Summary of Individual and Collective Allowance for Loan Losses and Loan Balances by Class (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Allowance, Individually Evaluated for Impairment	$2,906	$2,726
Allowance, Collectively Evaluated for Impairment	102,430	97,468
Loans	8,836,905	8,137,719
Loans Outstanding, Individually Evaluated for Impairment	41,097	36,648
Loans Outstanding, Collectively Evaluated for Impairment	7,846,138	7,200,743
Commercial Real Estate [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Allowance, Individually Evaluated for Impairment	2,782	2,136
Allowance, Collectively Evaluated for Impairment	32,061	32,674
Loans	2,920,808	2,707,046
Loans Outstanding, Individually Evaluated for Impairment	35,740	35,024
Loans Outstanding, Collectively Evaluated for Impairment	2,512,538	2,413,447
Commercial and Industrial [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Allowance, Individually Evaluated for Impairment	124	590
Allowance, Collectively Evaluated for Impairment	32,524	31,259
Loans	1,755,235	1,602,314
Loans Outstanding, Individually Evaluated for Impairment	5,357	1,624
Loans Outstanding, Collectively Evaluated for Impairment	1,684,110	1,553,677
Commercial Leases [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Allowance, Individually Evaluated for Impairment	'	'
Allowance, Collectively Evaluated for Impairment	1,767	1,744
Loans	141,714	130,133
Loans Outstanding, Individually Evaluated for Impairment	'	'
Loans Outstanding, Collectively Evaluated for Impairment	141,714	130,133
Commercial Loans [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Allowance, Individually Evaluated for Impairment	2,906	2,726
Allowance, Collectively Evaluated for Impairment	66,352	65,677
Loans	4,817,757	4,439,493
Loans Outstanding, Individually Evaluated for Impairment	41,097	36,648
Loans Outstanding, Collectively Evaluated for Impairment	4,338,362	4,097,257
Direct Installment [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Allowance, Individually Evaluated for Impairment	'	'
Allowance, Collectively Evaluated for Impairment	17,231	15,130
Loans	1,408,539	1,178,530
Loans Outstanding, Individually Evaluated for Impairment	'	'
Loans Outstanding, Collectively Evaluated for Impairment	1,349,804	1,108,865
Residential Mortgages [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Allowance, Individually Evaluated for Impairment	'	'
Allowance, Collectively Evaluated for Impairment	5,433	5,155
Loans	1,031,805	1,092,228
Loans Outstanding, Individually Evaluated for Impairment	'	'
Loans Outstanding, Collectively Evaluated for Impairment	669,978	653,826
Indirect Installment [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Allowance, Individually Evaluated for Impairment	'	'
Allowance, Collectively Evaluated for Impairment	6,127	5,449
Loans	638,312	582,037
Loans Outstanding, Individually Evaluated for Impairment	'	'
Loans Outstanding, Collectively Evaluated for Impairment	631,030	568,324
Consumer Lines of Credit [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Allowance, Individually Evaluated for Impairment	'	'
Allowance, Collectively Evaluated for Impairment	7,079	6,057
Loans	887,981	805,494
Loans Outstanding, Individually Evaluated for Impairment	'	'
Loans Outstanding, Collectively Evaluated for Impairment	804,453	732,534
Other [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Allowance, Individually Evaluated for Impairment	'	'
Allowance, Collectively Evaluated for Impairment	208	'
Loans	52,511	39,937
Loans Outstanding, Individually Evaluated for Impairment	'	'
Loans Outstanding, Collectively Evaluated for Impairment	52,511	39,937
Originated Loans [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans	7,887,235	7,237,391
Originated Loans [Member] \| Commercial Real Estate [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans	2,548,278	2,448,471
Originated Loans [Member] \| Commercial and Industrial [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans	1,689,467	1,555,301
Originated Loans [Member] \| Commercial Leases [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans	141,714	130,133
Originated Loans [Member] \| Commercial Loans [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans	4,379,459	4,133,905
Originated Loans [Member] \| Direct Installment [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans	1,349,804	1,108,865
Originated Loans [Member] \| Residential Mortgages [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans	669,978	653,826
Originated Loans [Member] \| Indirect Installment [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans	631,030	568,324
Originated Loans [Member] \| Consumer Lines of Credit [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans	804,453	732,534
Originated Loans [Member] \| Other [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans	$52,511	$39,937

Borrowings_Summary_of_ShortTer

Borrowings - Summary of Short-Term Borrowings (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Debt Disclosure [Abstract]	'	'
Securities sold under repurchase agreements	$834,610	$807,820
Federal funds purchased	200,000	140,000
Subordinated notes	131,570	135,318
Short-term borrowings	$1,166,180	$1,083,138

Borrowings_Summary_of_LongTerm

Borrowings - Summary of Long-Term Debt (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Debt Disclosure [Abstract]	'	'
Federal Home Loan Bank advances	$79	$88
Subordinated notes	82,457	79,897
Other subordinated debt	8,691	8,850
Convertible debt	580	590
Long-term debt	$91,807	$89,425

Borrowings_Additional_Informat

Borrowings - Additional Information (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Debt Disclosure [Abstract]	'	'
Credit available with FHLB	$3,212,358	'
Credit with FHLB used	$79	$88
Federal Home Loan Bank advances are scheduled to mature periodically through the year	'2019	'
Effective interest rates, minimum	3.78%	3.78%
Effective interest rates, maximum	4.19%	4.19%

Junior_Subordinated_Debt_Addit

Junior Subordinated Debt - Additional Information (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
	Trust
Debt Disclosure [Abstract]	'
Number of unconsolidated subsidiary trusts	5
Percent of the common equity of each Trust owned by the Corporation	100.00%
Increased total assets	$15,000,000
Amount of TPS repurchased	15,000
Debt extinguishment of TPS	$15,000

Junior_Subordinated_Debt_Junio

Junior Subordinated Debt - Junior Subordinated Debt Trusts (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	F.N.B. Statutory Trust I [Member]	F.N.B. Statutory Trust II [Member]	Omega Financial Capital Trust I [Member]	Sun Bancorp Statutory Trust I [Member]	Annapolis Bancorp Statutory Trust One[Member]
Subordinated Borrowing [Line Items]	'	'	'	'	'	'	'
Trust Preferred Securities	$189,000	'	$110,000	$21,500	$36,000	$16,500	$5,000
Common Securities	6,311	'	3,866	665	1,114	511	155
Junior subordinated debt	$194,213	$204,019	$113,866	$22,165	$36,016	$17,011	$5,155
Stated Maturity Date	'	'	31-Mar-33	15-Jun-36	18-Oct-34	22-Feb-31	26-Mar-33
Interest Rate	'	'	3.52%	1.90%	2.46%	10.20%	3.40%
Description of variable rate	'	'	'Variable; LIBOR + 325 basis points (bps)	'Variable; LIBOR + 165 bps	'Variable; LIBOR + 219 bps	'Fixed	'Variable; LIBOR + 315 bps
Basis points	'	'	3.25%	1.65%	2.19%	'	3.15%

Derivative_Instruments_Additio

Derivative Instruments - Additional Information (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
	Agreement
	Swap
Derivative Instruments And Hedging Activities Disclosure [Abstract]	'
Number of separate interest rate derivative agreements	4
Number of swaps with customers	300
Notional amounts of swaps with customers	$801,609
Number of swaps with derivative counterparties	266
Notional amount of swaps with derivative counterparties	1,001,609
Fair value of derivatives, in a net liability position	42,093
Collateral with derivative counterparties, fair value	39,493
Cash collateral posted	1,699
Additional amount in excess of posted collateral required in case of breached agreements	$3,014

Derivative_Instruments_Offsett

Derivative Instruments - Offsetting of Derivative Assets And Liabilities (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Derivative [Line Items]	'	'
Gross Amount	$38,042	$58,008
Gross Amounts Offset in the Balance Sheet, Derivative Assets	'	'
Net Amount Presented in the Balance Sheet	38,042	58,008
Gross Amount	44,472	58,150
Gross Amounts Offset in the Balance Sheet, Derivative Liabilities	'	'
Net Amount Presented in the Balance Sheet	44,472	58,150
Derivative Assets Subject to Master Netting Arrangement [Member]	'	'
Derivative [Line Items]	'	'
Gross Amount	1,846	'
Net Amount Presented in the Balance Sheet	2,243	'
Derivative Assets Subject to Master Netting Arrangement [Member] \| Interest Rate Contracts [Member]	'	'
Derivative [Line Items]	'	'
Gross Amount	2,225	'
Gross Amounts Offset in the Balance Sheet, Derivative Assets	'	'
Net Amount Presented in the Balance Sheet	2,225	'
Derivative Assets Subject to Master Netting Arrangement [Member] \| Equity Contracts [Member]	'	'
Derivative [Line Items]	'	'
Gross Amount	18	16
Gross Amounts Offset in the Balance Sheet, Derivative Assets	'	'
Net Amount Presented in the Balance Sheet	18	16
Derivative Assets Not Subject to Master Netting Arrangement [Member] \| Interest Rate Contracts [Member]	'	'
Derivative [Line Items]	'	'
Gross Amount	35,799	57,992
Gross Amounts Offset in the Balance Sheet, Derivative Assets	'	'
Net Amount Presented in the Balance Sheet	35,799	57,992
Derivative Liabilities Subject to Master Netting Arrangement [Member]	'	'
Derivative [Line Items]	'	'
Gross Amount	38,921	55,901
Net Amount Presented in the Balance Sheet	43,045	58,134
Derivative Liabilities Subject to Master Netting Arrangement [Member] \| Interest Rate Contracts [Member]	'	'
Derivative [Line Items]	'	'
Gross Amount	43,045	58,134
Gross Amounts Offset in the Balance Sheet, Derivative Liabilities	'	'
Net Amount Presented in the Balance Sheet	43,045	58,134
Derivative Liabilities Not Subject to Master Netting Arrangement [Member] \| Interest Rate Contracts [Member]	'	'
Derivative [Line Items]	'	'
Gross Amount	1,409	'
Gross Amounts Offset in the Balance Sheet, Derivative Liabilities	'	'
Net Amount Presented in the Balance Sheet	1,409	'
Derivative Liabilities Not Subject to Master Netting Arrangement [Member] \| Equity Contracts [Member]	'	'
Derivative [Line Items]	'	'
Gross Amount	18	16
Gross Amounts Offset in the Balance Sheet, Derivative Liabilities	'	'
Net Amount Presented in the Balance Sheet	$18	$16

Derivative_Instruments_Derivat

Derivative Instruments - Derivative Assets (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	$38,042	$58,008
Gross Amounts Not Offset in the Balance Sheet Financial Instruments, Derivative Assets	38,042	58,008
Gross Amounts Not Offset in the Balance Sheet Cash Collateral Received, Derivative Assets	397	'
Net Amount, Derivative Assets	'	'
Derivative Assets Subject to Master Netting Arrangement [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	2,243	'
Gross Amounts Not Offset in the Balance Sheet Financial Instruments, Derivative Assets	1,846	'
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	2	'
Gross Amounts Not Offset in the Balance Sheet Financial Instruments, Derivative Assets	2	'
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	205	'
Gross Amounts Not Offset in the Balance Sheet Financial Instruments, Derivative Assets	205	'
Counterparty E [Member]	'	'
Derivative [Line Items]	'	'
Gross Amounts Not Offset in the Balance Sheet Cash Collateral Received, Derivative Assets	'	'
Net Amount, Derivative Assets	'	16
Counterparty E [Member] \| Derivative Assets Subject to Master Netting Arrangement [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	936	16
Gross Amounts Not Offset in the Balance Sheet Financial Instruments, Derivative Assets	936	'
Counterparty F [Member]	'	'
Derivative [Line Items]	'	'
Gross Amounts Not Offset in the Balance Sheet Cash Collateral Received, Derivative Assets	'	'
Net Amount, Derivative Assets	'	'
Counterparty F [Member] \| Derivative Assets Subject to Master Netting Arrangement [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	205	'
Gross Amounts Not Offset in the Balance Sheet Financial Instruments, Derivative Assets	205	'
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	112	'
Gross Amounts Not Offset in the Balance Sheet Financial Instruments, Derivative Assets	112	'
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	386	'
Gross Amounts Not Offset in the Balance Sheet Financial Instruments, Derivative Assets	386	'
Counterparty J [Member]	'	'
Derivative [Line Items]	'	'
Gross Amounts Not Offset in the Balance Sheet Cash Collateral Received, Derivative Assets	397	'
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	397	'
Gross Amounts Not Offset in the Balance Sheet Financial Instruments, Derivative Assets	'	'

Derivative_Instruments_Derivat1

Derivative Instruments - Derivative Liabilities (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	$44,472	$58,150
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities	44,472	58,150
Derivative Liabilities Subject to Master Netting Arrangement [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	43,045	58,134
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities	38,921	55,901
Gross Amount Not Offset in the Balance Sheet Cash Collateral Pledged, Derivative Liabilities	1,513	'
Net Amount, Derivative Liabilities	2,611	2,233
Counterparty A [Member] \| Derivative Liabilities Subject to Master Netting Arrangement [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	5,528	8,393
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities	5,528	8,393
Gross Amount Not Offset in the Balance Sheet Cash Collateral Pledged, Derivative Liabilities	'	'
Net Amount, Derivative Liabilities	'	'
Counterparty B [Member] \| Derivative Liabilities Subject to Master Netting Arrangement [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	3,714	5,601
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities	3,612	5,601
Gross Amount Not Offset in the Balance Sheet Cash Collateral Pledged, Derivative Liabilities	'	'
Net Amount, Derivative Liabilities	102	'
Counterparty C [Member] \| Derivative Liabilities Subject to Master Netting Arrangement [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	1,589	2,145
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities	1,589	2,145
Gross Amount Not Offset in the Balance Sheet Cash Collateral Pledged, Derivative Liabilities	'	'
Net Amount, Derivative Liabilities	'	'
Counterparty D [Member] \| Derivative Liabilities Subject to Master Netting Arrangement [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	10,131	12,354
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities	10,131	12,354
Gross Amount Not Offset in the Balance Sheet Cash Collateral Pledged, Derivative Liabilities	'	'
Net Amount, Derivative Liabilities	'	'
Counterparty E [Member] \| Derivative Liabilities Subject to Master Netting Arrangement [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	6,069	8,846
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities	6,069	8,846
Gross Amount Not Offset in the Balance Sheet Cash Collateral Pledged, Derivative Liabilities	'	'
Net Amount, Derivative Liabilities	'	'
Counterparty F [Member] \| Derivative Liabilities Subject to Master Netting Arrangement [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	25	353
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities	25	282
Gross Amount Not Offset in the Balance Sheet Cash Collateral Pledged, Derivative Liabilities	'	'
Net Amount, Derivative Liabilities	'	71
Counterparty G [Member] \| Derivative Liabilities Subject to Master Netting Arrangement [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	5,213	5,497
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities	5,213	5,497
Gross Amount Not Offset in the Balance Sheet Cash Collateral Pledged, Derivative Liabilities	'	'
Net Amount, Derivative Liabilities	'	'
Counterparty H [Member] \| Derivative Liabilities Subject to Master Netting Arrangement [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	2,634	3,937
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities	125	1,775
Gross Amount Not Offset in the Balance Sheet Cash Collateral Pledged, Derivative Liabilities	'	'
Net Amount, Derivative Liabilities	2,509	2,162
Counterparty I [Member] \| Derivative Liabilities Subject to Master Netting Arrangement [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	6,629	11,008
Gross Amount Not Offset in the Balance Sheet Financial Instruments, Derivative Liabilities	6,629	11,008
Gross Amount Not Offset in the Balance Sheet Cash Collateral Pledged, Derivative Liabilities	'	'
Net Amount, Derivative Liabilities	'	'
Counterparty J [Member] \| Derivative Liabilities Subject to Master Netting Arrangement [Member]	'	'
Derivative [Line Items]	'	'
Net Amount Presented in the Balance Sheet	1,513	'
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	1,513	'
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 $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Interest Rate Contracts [Member] \| Other Income [Member]	'	'
Derivative [Line Items]	'	'
Interest Rate Products	$40	$40

Recovered_Sheet9

Commitments, Credit Risk and Contingencies - Summary of Off-Balance Sheet Credit Risk Information (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Commitments to Extend Credit [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Extended credit and standby letters of credit	$2,822,545	$2,600,355
Standby Letters of Credit [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Extended credit and standby letters of credit	$122,713	$130,912

Recovered_Sheet10

Commitments, Credit Risk and Contingencies - Additional Information (Detail)	Sep. 30, 2013
Commitments And Contingencies Disclosure [Abstract]	'
Percentage of Commitments to extend credit dependent upon the financial condition of the customers	78.30%

Stock_Incentive_Plans_Addition

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

9 Months Ended

In Thousands, except Share data, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2012

Jun. 16, 2009

Sep. 30, 2013

Jan. 02, 2012

Sep. 30, 2013

Apr. 06, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Apr. 06, 2013

Sep. 30, 2013

Parkvale Financial Corporation [Member]

Annapolis Bancorp, Inc. [Member]

Service-Based Awards [Member]

Performance-Based Awards [Member]

Discretionary Service-Based Awards [Member]

Restricted Stock [Member]

Employee Stock Option [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

344,479

275,674

Aggregate, weighted average grant date fair value

$3,802

$3,384

Common stock shares available under Incentive Compensation Plans

2,734,087

Vesting period of awards expensed, years

'3 years

'4 years

'5 years

'10 years

Share-based compensation expense related to restricted stock awards

$3,338

$2,634

Tax benefit related to restricted stock awards

1,186

922

Total fair value of awards vested

8,259

2,068

Unrecognized compensation cost related to unvested restricted stock awards

5,786

Amount subject to accelerated vesting under Incentive Compensation Plan

Stock options exercised

36,647

174,565

36,647

174,565

Stock options granted

Intrinsic value of outstanding and exercisable stock options

$217

Maximum common shares available for purchase under warrants

1,302,083

651,042

Warrant issued, exercise price

5.81

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 $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'	'
Awards, Unvested awards outstanding at beginning of period	1,913,073	1,846,115
Awards, Granted	344,479	275,674
Awards, Net adjustment due to performance	73,835	28,181
Awards, Vested	-734,129	-168,361
Awards, Forfeited	-37,175	-166,018
Awards, Dividend reinvestment	43,934	55,349
Awards, Unvested awards outstanding at end of period	1,604,017	1,870,940
Weighted Average Grant Price, Unvested awards outstanding at beginning of year	$9.17	$8.44
Weighted Average Grant Price, Granted	$11.04	$12.28
Weighted Average Grant Price, Net adjustment due to performance	$10.60	$8.31
Weighted Average Grant Price, Vested	$7.60	$8.06
Weighted Average Grant Price, Forfeited	$10.40	$8.53
Weighted Average Grant Price, Dividend reinvestment	$11.66	$11.38
Weighted Average Grant Price, Unvested awards outstanding at end of year	$10.26	$9.12

Stock_Incentive_Plans_Componen

Stock Incentive Plans - Components of Restricted Stock Awards (Detail) (USD $)	9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Unvested awards	1,604,017	1,913,073	1,870,940	1,846,115
Unrecognized compensation expense	$5,786	'	'	'
Intrinsic value	19,457	'	'	'
Weighted average remaining life (in years)	'2 years 3 months 26 days	'	'	'
Service-Based Awards [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Unvested awards	425,378	'	'	'
Unrecognized compensation expense	1,980	'	'	'
Intrinsic value	5,160	'	'	'
Weighted average remaining life (in years)	'2 years 2 months 27 days	'	'	'
Performance-Based Awards [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Unvested awards	1,178,639	'	'	'
Unrecognized compensation expense	3,806	'	'	'
Intrinsic value	$14,297	'	'	'
Weighted average remaining life (in years)	'2 years 4 months 6 days	'	'	'

Stock_Incentive_Plans_Summary_1

Stock Incentive Plans - Summary of Information Concerning Stock Option Awards (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'	'
Weighted Average Exercise Price, Options outstanding at beginning of period	$13.21	$14.93
Weighted Average Exercise Price, Assumed from acquisition	$7.92	$10.41
Weighted Average Exercise Price, Exercised	$8.90	$8.80
Weighted Average Exercise Price, Forfeited	$15.10	$13.74
Weighted Average Exercise Price, Options outstanding and exercisable at end of period	$11.65	$12.99
Shares, Options outstanding at beginning of period	640,050	586,020
Shares, Assumed from acquisition	19,223	627,808
Shares, Exercised	-36,647	-174,565
Shares, Forfeited	-298,150	-329,477
Shares, Options outstanding and exercisable at end of period	324,476	709,786

Recovered_Sheet11

Retirement and Other Postretirement Benefit Plans - Additional Information (Detail) (USD $)	9 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2008
	RetirementPlans	Sep. 30, 2012	Dec. 31, 2008
Compensation And Retirement Disclosure [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	$6,975	$6,664	'

Recovered_Sheet12

Retirement and Other Postretirement Benefit Plans - Net Periodic Benefit Cost for Defined Benefit Plans (Detail) (Defined Benefit Plans [Member], USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Defined Benefit Plans [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Service cost	$15	$13	$51	$47
Interest cost	1,437	1,545	4,291	4,627
Expected return on plan assets	-2,271	-2,034	-6,811	-5,902
Amortization	'	'	'	'
Unrecognized net transition asset	-24	-24	-70	-70
Unrecognized prior service cost (credit)	2	2	6	6
Unrecognized loss	575	484	1,689	1,378
Net periodic pension benefit cost	($266)	($14)	($844)	$86

Retirement_and_Other_Postretir2

Retirement and Other Postretirement Benefit Plans - Net Periodic Postretirement Benefit Cost (Detail) (Postretirement Benefit [Member], USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Postretirement Benefit [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Interest cost	$8	$9	$24	$33
Amortization of unrecognized loss	2	-3	2	3
Net periodic pension benefit cost	$10	$6	$26	$36

Comprehensive_Income_Component

Comprehensive Income - Components of Comprehensive Income, Net of Related Tax (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Components Of Comprehensive Income [Abstract]	'	'	'	'
Net income	$31,634	$30,743	$89,365	$81,455
Unrealized gains (losses) on securities, Arising during the period, net of tax (benefit) expense of $(2,635), $1,061, $(8,835) and $3,112	-4,894	1,970	-16,408	5,779
Unrealized gains (losses) on securities, Less: reclassification adjustment for (losses) gains included in net income, net of tax (benefit) expense of $2, $(65), $260 and $247	-3	120	-483	-459
Unrealized gains (losses) on derivative instruments, net of tax expense (benefit) of $239 and $(2,215)	443	'	-4,113	'
Unrealized gains associated with pension and postretirement benefits, net of tax expense of $194, $161, $569 and $461	360	299	1,057	856
Other comprehensive income (loss)	-4,094	2,389	-19,947	6,176
Comprehensive income	$27,540	$33,132	$69,418	$87,631

Comprehensive_Income_Component1

Comprehensive Income - Components of Comprehensive Income, Net of Related Tax (Parenthetical) (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Components Of Comprehensive Income [Abstract]	'	'	'	'
Unrealized gains (losses) on securities, Arising during the period, tax (benefit) expense	($2,635)	$1,061	($8,835)	$3,112
Unrealized gains (losses) on securities, Reclassification adjustment for (losses) gains included in net income, tax expense	2	-65	260	247
Unrealized gains (losses) on derivative instruments, tax benefit	239	'	-2,215	'
Unrealized gains associated with pension and postretirement benefits, tax benefit	$194	$161	$569	$461

Comprehensive_Income_Changes_i

Comprehensive Income - Changes in Accumulated Other Comprehensive Income, Net of Tax, by Component (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Accumulated other comprehensive income, Beginning balance	'	'	($46,224)	'
Other comprehensive income before reclassifications	'	'	-19,464	'
Amounts reclassified from accumulated other comprehensive income	'	'	-483	'
Net current period other comprehensive income	-4,094	2,389	-19,947	6,176
Accumulated other comprehensive income, Ending balance	-66,171	'	-66,171	'
Unrealized Net Gains on Securities Available for Sale [Member]	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Accumulated other comprehensive income, Beginning balance	'	'	9,269	'
Other comprehensive income before reclassifications	'	'	-17,914	'
Amounts reclassified from accumulated other comprehensive income	'	'	-483	'
Net current period other comprehensive income	'	'	-18,397	'
Accumulated other comprehensive income, Ending balance	-9,128	'	-9,128	'
Non-Credit Related Loss on Debt Securities not Expected to be Sold [Member]	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Accumulated other comprehensive income, Beginning balance	'	'	-8,039	'
Other comprehensive income before reclassifications	'	'	1,506	'
Net current period other comprehensive income	'	'	1,506	'
Accumulated other comprehensive income, Ending balance	-6,533	'	-6,533	'
Unrealized Losses on Derivative Instruments [Member]	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Accumulated other comprehensive income, Beginning balance	'	'	-171	'
Other comprehensive income before reclassifications	'	'	-4,113	'
Net current period other comprehensive income	'	'	-4,113	'
Accumulated other comprehensive income, Ending balance	-4,284	'	-4,284	'
Unrecognized Pension and Postretirement Obligations [Member]	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Accumulated other comprehensive income, Beginning balance	'	'	-47,283	'
Other comprehensive income before reclassifications	'	'	1,057	'
Net current period other comprehensive income	'	'	1,057	'
Accumulated other comprehensive income, Ending balance	($46,226)	'	($46,226)	'

Comprehensive_Income_Summary_o

Comprehensive Income - Summary of Reclassifications Out of Accumulated Other Comprehensive Income (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Net securities gains	$5	($66)	$757	$302
Tax (expense) benefit	9,977	12,090	34,024	32,549
Net Income	31,634	30,743	89,365	81,455
Amount Reclassified from Other Comprehensive Income [Member] \| Unrealized Net Gains on Securities Available for Sale [Member]	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Net securities gains	'	'	-743	'
Tax (expense) benefit	'	'	-260	'
Net Income	'	'	($483)	'

Earnings_Per_Share_Computation

Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]	'	'	'	'
Net income	$31,634	$30,743	$89,365	$81,455
Basic weighted average common shares outstanding	144,759,887	139,228,812	142,949,134	139,074,244
Net effect of dilutive stock options, warrants, restricted stock and convertible debt	1,686,555	1,535,240	1,520,683	1,474,334
Diluted weighted average common shares outstanding	146,446,442	140,764,052	144,469,817	140,548,578
Basic earnings per share	$0.22	$0.22	$0.63	$0.59
Diluted earnings per share	$0.22	$0.22	$0.62	$0.58

Earnings_Per_Share_Additional_

Earnings Per Share - Additional Information (Detail)	3 Months Ended		9 Months Ended
Earnings Per Share - Additional Information (Detail)	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]	'	'	'	'
Common stock excluded from computation of diluted earnings per share	17,081	168,227	41,779	156,983

Cash_Flow_Information_Summary_

Cash Flow Information - Summary of Supplemental Cash Flow Information (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Statement Of Cash Flows [Abstract]	'	'
Interest paid on deposits and other borrowings	$36,340	$42,227
Income taxes paid	18,700	7,250
Transfers of loans to other real estate owned	10,856	12,086
Financing of other real estate owned sold	$549	$701

Business_Segments_Additional_I

Business Segments - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2013
	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		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]	'	'	'	'	'
Interest income	$109,790	$107,756	$322,749	$324,328	'
Interest expense	10,536	14,225	33,653	45,395	'
Net interest income	99,254	93,531	289,096	278,933	'
Provision for loan losses	7,280	8,429	22,724	22,028	'
Non-interest income	32,858	34,813	103,282	99,336	'
Non-interest expense	81,106	74,840	240,039	235,345	'
Intangible amortization	2,115	2,242	6,226	6,892	'
Income tax expense (benefit)	9,977	12,090	34,024	32,549	'
Net income (loss)	31,634	30,743	89,365	81,455	'
Total assets	12,790,279	11,984,891	12,790,279	11,984,891	12,023,976
Total intangibles	748,909	717,263	748,909	717,263	'
Operating Segments [Member] \| Community Banking [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Interest income	98,716	97,364	289,984	293,756	'
Interest expense	7,552	10,912	24,449	35,130	'
Net interest income	91,164	86,452	265,535	258,626	'
Provision for loan losses	5,432	6,826	17,283	17,215	'
Non-interest income	24,365	25,048	74,118	72,904	'
Non-interest expense	68,091	61,820	198,395	196,510	'
Intangible amortization	1,938	2,056	5,694	6,334	'
Income tax expense (benefit)	9,552	11,456	32,486	31,882	'
Net income (loss)	30,516	29,342	85,795	79,589	'
Total assets	12,610,043	11,803,432	12,610,043	11,803,432	'
Total intangibles	725,389	693,029	725,389	693,029	'
Operating Segments [Member] \| Wealth Management [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Interest income	'	'	'	4	'
Net interest income	'	'	'	4	'
Non-interest income	6,916	6,006	21,294	17,889	'
Non-interest expense	5,850	4,844	18,338	14,587	'
Intangible amortization	76	80	228	240	'
Income tax expense (benefit)	366	396	1,009	1,117	'
Net income (loss)	624	686	1,719	1,949	'
Total assets	19,614	19,075	19,614	19,075	'
Total intangibles	11,084	11,392	11,084	11,392	'
Operating Segments [Member] \| Insurance [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Interest income	27	27	82	85	'
Net interest income	27	27	82	85	'
Non-interest income	3,222	3,602	10,024	10,072	'
Non-interest expense	2,799	2,947	8,420	8,658	'
Intangible amortization	101	106	304	318	'
Income tax expense (benefit)	128	204	497	420	'
Net income (loss)	221	372	885	761	'
Total assets	19,788	19,281	19,788	19,281	'
Total intangibles	10,627	11,033	10,627	11,033	'
Operating Segments [Member] \| Consumer Finance [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Interest income	9,600	8,860	27,920	25,888	'
Interest expense	839	869	2,533	2,736	'
Net interest income	8,761	7,991	25,387	23,152	'
Provision for loan losses	1,725	1,421	4,930	4,218	'
Non-interest income	681	590	2,029	1,674	'
Non-interest expense	4,724	4,829	14,063	14,016	'
Income tax expense (benefit)	1,145	888	3,234	2,530	'
Net income (loss)	1,848	1,443	5,189	4,062	'
Total assets	182,695	170,304	182,695	170,304	'
Total intangibles	1,809	1,809	1,809	1,809	'
Parent and Other [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Interest income	1,447	1,505	4,763	4,595	'
Interest expense	2,145	2,444	6,671	7,529	'
Net interest income	-698	-939	-1,908	-2,934	'
Provision for loan losses	123	182	511	595	'
Non-interest income	-2,326	-433	-4,183	-3,203	'
Non-interest expense	-358	400	823	1,574	'
Income tax expense (benefit)	-1,214	-854	-3,202	-3,400	'
Net income (loss)	-1,575	-1,100	-4,223	-4,906	'
Total assets	($41,861)	($27,201)	($41,861)	($27,201)	'

Fair_Value_Measurements_Additi

Fair Value Measurements - Additional Information (Detail) (USD $)	9 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Fair Value Measurements Disclosure [Line Items]	'	'	'
Percentage of securities using market-based information	97.00%	'	'
Percentage of securities using model-based techniques	3.00%	'	'
Change in discount rate	1.00%	'	'
One percent change in affecting fair value of debt obligation, amount	$3,000	'	'
One percent change in affecting fair value of debt obligation, percent	7.00%	'	'
Minimum corporation reserves for commercial loan	500	'	'
Transfer between hierarchy levels	4	0	'
Change in unrealized gains or losses included in earnings relating to assets still held	78	'	'
Impaired loans, carrying amount	14,424	'	'
Allocated allowance for loan losses	2,906	'	'
Fair value of allocated allowance	13,122	'	'
Estimated costs to sell	1,604	'	'
Provision for fair value measurements included in allowance for loan losses	771	'	'
Carrying amount of OREO	10,738	'	'
Written down of OREO	8,245	'	'
Fair value of OREO	9,385	'	19,311
Estimated cost to sell OREO	1,140	'	'
Loss from OREO included in earnings	2,493	'	'
Short-term borrowings approximate fair value for amounts that mature, days, less than	'90 days	'	'
Assets Still Held [Member]	'	'	'
Fair Value Measurements Disclosure [Line Items]	'	'	'
Change in unrealized gains or losses included in earnings relating to assets still held	$0	$0	'
Minimum [Member]	'	'	'
Fair Value Measurements Disclosure [Line Items]	'	'	'
Valuation of investment securities basis spread on index	4.50%	'	'
Maximum [Member]	'	'	'
Fair Value Measurements Disclosure [Line Items]	'	'	'
Valuation of investment securities basis spread on index	14.00%	'	'

Fair_Value_Measurements_Balanc

Fair Value Measurements - Balances of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	$1,113,390	$1,170,676
Assets measured at fair value, Available for sale equity securities	2,168	2,007
Assets measured at fair value, Available for sale securities	1,115,558	1,172,683
Derivative financial instruments	38,042	58,008
Assets measured at fair value, Total	1,153,600	1,230,691
Derivative financial instruments	44,472	58,150
Liabilities measured at fair value, Total	44,472	58,150
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	332,152	354,457
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	227,638	275,150
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	489,047	469,547
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	1,846	2,729
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	17,875	24,824
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	28,704	22,456
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	16,128	21,513
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	2,104	1,962
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	64	45
Trading Assets [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Derivative financial instruments	37,655	58,008
Not for Trading Assets [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Derivative financial instruments	387	'
Trading Liabilities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Derivative financial instruments	37,495	58,150
Not for Trading Liabilities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Derivative financial instruments	6,977	'
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	750	396
Assets measured at fair value, Available for sale securities	750	396
Derivative financial instruments	'	'
Assets measured at fair value, Total	750	396
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] \| 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] \| 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] \| 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] \| 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] \| 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	686	351
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	64	45
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	1,082,859	1,138,623
Assets measured at fair value, Available for sale equity securities	1,020	1,099
Assets measured at fair value, Available for sale securities	1,083,879	1,139,722
Derivative financial instruments	38,042	58,008
Assets measured at fair value, Total	1,121,921	1,197,730
Liabilities measured at fair value, Total	44,472	58,150
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	332,152	354,457
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	227,638	275,150
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	489,047	469,547
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	19	24
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	17,875	24,824
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] \| 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	16,128	14,621
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	1,020	1,099
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] \| Trading Assets [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Derivative financial instruments	37,655	58,008
Level 2 [Member] \| Not for Trading Assets [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Derivative financial instruments	387	'
Level 2 [Member] \| Trading Liabilities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Derivative financial instruments	37,495	58,150
Level 2 [Member] \| Not for Trading Liabilities [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Derivative financial instruments	6,977	'
Level 3 [Member]	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'
Assets measured at fair value, Available for sale debt securities	30,531	32,053
Assets measured at fair value, Available for sale equity securities	398	512
Assets measured at fair value, Available for sale securities	30,929	32,565
Derivative financial instruments	'	'
Assets measured at fair value, Total	30,929	32,565
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] \| 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	1,827	2,705
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] \| 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	28,704	22,456
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	'	6,892
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	398	512
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] \| 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 $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Balance at beginning of period	$32,565	$11,603
Total gains (losses) - realized/unrealized, Included in earnings	78	'
Total gains (losses) - realized/unrealized, Included in other comprehensive income	4,567	1,802
Accretion included in earnings	2,326	2,544
Purchases	'	21,753
Issuances	29	46
Sales/redemptions	-1,033	-2,542
Settlements	-1,521	-2,641
Transfers from Level 3	-6,082	'
Transfers into Level 3	'	'
Balance at end of period	30,929	32,565
Pooled Trust Preferred Collateralized Debt Obligations [Member]	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Balance at beginning of period	22,456	5,998
Total gains (losses) - realized/unrealized, Included in earnings	'	'
Total gains (losses) - realized/unrealized, Included in other comprehensive income	4,561	917
Accretion included in earnings	2,311	2,515
Purchases	'	16,569
Issuances	29	46
Sales/redemptions	'	-2,542
Settlements	-653	-1,047
Transfers from Level 3	'	'
Transfers into Level 3	'	'
Balance at end of period	28,704	22,456
Other Debt Securities [Member]	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Balance at beginning of period	6,892	5,197
Total gains (losses) - realized/unrealized, Included in earnings	78	'
Total gains (losses) - realized/unrealized, Included in other comprehensive income	21	732
Accretion included in earnings	4	9
Purchases	'	954
Issuances	'	'
Sales/redemptions	-1,033	'
Settlements	'	'
Transfers from Level 3	-5,962	'
Transfers into Level 3	'	'
Balance at end of period	'	6,892
Equity Securities [Member]	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Balance at beginning of period	512	408
Total gains (losses) - realized/unrealized, Included in earnings	'	'
Total gains (losses) - realized/unrealized, Included in other comprehensive income	6	104
Accretion included in earnings	'	'
Purchases	'	'
Issuances	'	'
Sales/redemptions	'	'
Settlements	'	'
Transfers from Level 3	-120	'
Transfers into Level 3	'	'
Balance at end of period	398	512
Residential Non-Agency Collateralized Mortgage Obligations [Member]	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Balance at beginning of period	2,705	'
Total gains (losses) - realized/unrealized, Included in earnings	'	'
Total gains (losses) - realized/unrealized, Included in other comprehensive income	-21	49
Accretion included in earnings	11	20
Purchases	'	4,230
Issuances	'	'
Sales/redemptions	'	'
Settlements	-868	-1,594
Transfers from Level 3	'	'
Transfers into Level 3	'	'
Balance at end of period	$1,827	$2,705

Fair_Value_Measurements_Additi2

Fair Value Measurements - Additional Information about Assets Measured at Fair Value on Non-Recurring Basis (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]	'	'
Impaired loans	$13,122	$17,496
Other real estate owned	9,385	19,311
Investment security, held-to-maturity:	'	'
Non-agency CMO	'	3,636
Level 1 [Member]	'	'
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]	'	'
Impaired loans	'	'
Other real estate owned	'	'
Investment security, held-to-maturity:	'	'
Non-agency CMO	'	'
Level 2 [Member]	'	'
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]	'	'
Impaired loans	3,880	14,325
Other real estate owned	4,751	5,771
Investment security, held-to-maturity:	'	'
Non-agency CMO	'	'
Level 3 [Member]	'	'
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]	'	'
Impaired loans	9,242	3,171
Other real estate owned	4,634	13,540
Investment security, held-to-maturity:	'	'
Non-agency CMO	'	$3,636

Fair_Value_Measurements_Fair_V

Fair Value Measurements - Fair Values of Corporation's Financial Instruments (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'
Cash and cash equivalents	$283,509	$239,044	$367,594	$208,953
Securities available for sale	1,115,558	1,172,683	'	'
Securities held to maturity	1,180,992	1,106,563	'	'
Net loans, including loans held for sale	8,734,958	8,061,096	'	'
Bank owned life insurance	263,781	246,088	'	'
Derivative assets	38,042	58,008	'	'
Accrued interest receivable	33,025	30,210	'	'
Deposits	9,723,371	9,082,174	'	'
Short-term borrowings	1,166,180	1,083,138	'	'
Long-term debt	91,807	89,425	'	'
Junior subordinated debt	194,213	204,019	'	'
Derivative liabilities	44,472	58,150	'	'
Accrued interest payable	6,368	9,054	'	'
Level 1 [Member]	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'
Securities available for sale	750	396	'	'
Derivative assets	'	'	'	'
Level 2 [Member]	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'
Securities available for sale	1,083,879	1,139,722	'	'
Derivative assets	38,042	58,008	'	'
Level 3 [Member]	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'
Securities available for sale	30,929	32,565	'	'
Derivative assets	'	'	'	'
Fair Value [Member]	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'
Cash and cash equivalents	283,509	239,044	'	'
Securities available for sale	1,115,558	1,172,683	'	'
Securities held to maturity	1,181,652	1,143,213	'	'
Net loans, including loans held for sale	8,597,123	7,996,554	'	'
Bank owned life insurance	268,641	257,060	'	'
Derivative assets	38,042	58,008	'	'
Accrued interest receivable	33,025	30,210	'	'
Deposits	9,736,492	9,117,757	'	'
Short-term borrowings	1,166,180	1,083,138	'	'
Long-term debt	94,670	92,329	'	'
Junior subordinated debt	190,150	172,246	'	'
Derivative liabilities	44,472	58,150	'	'
Accrued interest payable	6,368	9,054	'	'
Fair Value [Member] \| Level 1 [Member]	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'
Cash and cash equivalents	283,509	239,044	'	'
Securities available for sale	750	396	'	'
Securities held to maturity	'	'	'	'
Net loans, including loans held for sale	'	'	'	'
Bank owned life insurance	268,641	257,060	'	'
Derivative assets	'	'	'	'
Accrued interest receivable	33,025	30,210	'	'
Deposits	7,375,322	6,546,316	'	'
Short-term borrowings	1,166,180	1,083,138	'	'
Long-term debt	'	'	'	'
Junior subordinated debt	'	'	'	'
Derivative liabilities	'	'	'	'
Accrued interest payable	6,368	9,054	'	'
Fair Value [Member] \| Level 2 [Member]	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'
Cash and cash equivalents	'	'	'	'
Securities available for sale	1,083,879	1,139,722	'	'
Securities held to maturity	1,174,282	1,128,524	'	'
Net loans, including loans held for sale	'	'	'	'
Bank owned life insurance	'	'	'	'
Derivative assets	38,042	58,008	'	'
Accrued interest receivable	'	'	'	'
Deposits	2,361,170	2,571,441	'	'
Short-term borrowings	'	'	'	'
Long-term debt	'	'	'	'
Junior subordinated debt	'	'	'	'
Derivative liabilities	44,472	58,150	'	'
Accrued interest payable	'	'	'	'
Fair Value [Member] \| Level 3 [Member]	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'
Cash and cash equivalents	'	'	'	'
Securities available for sale	30,929	32,565	'	'
Securities held to maturity	7,370	14,689	'	'
Net loans, including loans held for sale	8,597,123	7,966,554	'	'
Bank owned life insurance	'	'	'	'
Derivative assets	'	'	'	'
Accrued interest receivable	'	'	'	'
Deposits	'	'	'	'
Short-term borrowings	'	'	'	'
Long-term debt	94,670	92,329	'	'
Junior subordinated debt	190,150	172,246	'	'
Derivative liabilities	'	'	'	'
Accrued interest payable	'	'	'	'