Fulton Financial (FULT) 10-Q11 May 152015 Q1 Quarterly reportFinancial data

Company Profile

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
Document and Entity Information	Mar. 31, 2015	Apr. 30, 2015
Document and Entity Information
Entity Registrant Name	FULTON FINANCIAL CORP
Entity Central Index Key	700564
Trading Symbol	fult
Current Fiscal Year End Date	-19
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Amendment Flag	FALSE
Entity Common Stock, Shares Outstanding		176,691,000

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
ASSETS
Cash and due from banks	$91,870	$105,702
Interest-bearing deposits with other banks	637,973	358,130
Federal Reserve Bank and Federal Home Loan Bank stock	65,694	64,953
Loans held for sale	34,124	17,522
Available for sale investment securities	2,259,802	2,323,371
Loans, net of unearned income	13,115,505	13,111,716
Less: Allowance for loan losses	-177,701	-184,144
Net Loans	12,937,804	12,927,572
Premises and equipment	226,241	226,027
Accrued interest receivable	42,216	41,818
Goodwill and intangible assets	531,672	531,803
Other assets	535,945	527,869
Total Assets	17,363,341	17,124,767
LIABILITIES
Noninterest-bearing	3,765,677	3,640,623
Interest-bearing	9,748,820	9,726,883
Total Deposits	13,514,497	13,367,506
Short-term borrowings:
Federal funds purchased	43	6,219
Other short-term borrowings	410,062	323,500
Total Short-Term Borrowings	410,105	329,719
Accrued interest payable	18,357	18,045
Other liabilities	294,352	273,419
Federal Home Loan Bank advances and long-term debt	1,094,517	1,139,413
Total Liabilities	15,331,828	15,128,102
SHAREHOLDERSâ€™ EQUITY
Common stock, $2.50 par value, 600 million shares authorized, 218.3 million shares issued in 2015 and 218.2 million shares issued in 2014	545,734	545,555
Additional paid-in capital	1,422,012	1,420,523
Retained earnings	582,724	558,810
Accumulated other comprehensive loss	-9,800	-17,722
Treasury stock, at cost, 39.2 million shares in 2015 and 39.3 million shares in 2014	-509,157	-510,501
Total Shareholdersâ€™ Equity	2,031,513	1,996,665
Total Liabilities and Shareholdersâ€™ Equity	$17,363,341	$17,124,767

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Common stock, par value	$2.50	$2.50
Common stock, shares authorized	600,000,000	600,000,000
Common stock, shares issued	218,300,000	218,200,000
Treasury stock, shares	39,200,000	39,300,000

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
INTEREST INCOME
Loans, including fees	$129,777	$131,830
Investment securities:
Taxable	11,282	13,266
Tax-exempt	2,087	2,348
Dividends	348	332
Loans held for sale	173	134
Other interest income	2,105	882
Total Interest Income	145,772	148,792
INTEREST EXPENSE
Deposits	9,823	7,896
Short-term borrowings	77	633
Long-term debt	12,291	10,698
Total Interest Expense	22,191	19,227
Net Interest Income	123,581	129,565
Provision for credit losses	-3,700	2,500
Net Interest Income After Provision for Credit Losses	127,281	127,065
NON-INTEREST INCOME
Service charges on deposit accounts	11,569	11,711
Investment management and trust services	10,889	10,958
Other service charges and fees	9,363	8,927
Mortgage banking income	4,688	3,605
Net gains on sales of investment securities	4,145	0
Other	4,083	3,305
Total Non-Interest Income	44,737	38,506
NON-INTEREST EXPENSE
Salaries and employee benefits	64,990	59,566
Net occupancy expense	13,692	13,603
Other outside services	5,750	3,812
Data processing	4,768	3,796
FDIC insurance expense	3,958	3,602
Software	3,318	2,925
Professional fees	2,871	2,904
FDIC insurance expense	2,822	2,689
Supplies and postage	2,369	2,326
Telecommunications	1,716	1,819
Other real estate owned and repossession expense	1,362	983
Marketing	1,233	1,584
Operating risk loss	827	1,828
Intangible amortization	130	315
Other	8,672	7,802
Total Non-Interest Expense	118,478	109,554
Income Before Income Taxes	53,540	56,017
Income taxes	13,504	14,234
Net Income	$40,036	$41,783
PER SHARE:
Net Income (Basic) (in dollars per share)	$0.22	$0.22
Net Income (Diluted) (in dollars per share)	$0.22	$0.22
Cash Dividends (in dollars per share)	$0.09	$0.08

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net Income	$40,036	$41,783
Other Comprehensive Income, net of tax:
Unrealized gain on securities	9,992	13,933
Reclassification adjustment for postretirement amendment gains included in net income	0	-944
Reclassification adjustment for securities gains included in net income	-2,695	0
Non-credit related unrealized gain on other-than-temporarily impaired debt securities	125	189
Unrealized gain on derivative financial instruments	34	34
Unrecognized postretirement income arising due to plan amendment	0	2,144
Amortization of net unrecognized pension and postretirement items	466	96
Other Comprehensive Income	7,922	15,452
Total Comprehensive Income	$47,958	$57,235

Consolidated_Statements_of_Sha

Consolidated Statements of Shareholders' Equity (USD $)	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Treasury Stock [Member]
In Thousands, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Treasury Stock [Member]
Beginning Balance at Dec. 31, 2013	$2,063,187	$544,568	$1,432,974	$463,843	($37,341)	($340,857)
Beginning Balance (in shares) at Dec. 31, 2013		192,652
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	41,783			41,783
Other comprehensive income	15,452				15,452
Stock issued, including related tax benefits	2,177	253	539			1,385
Stock issued, including related tax benefits (in shares)		198
Stock-based compensation awards	1,033		1,033
Acquisition of treasury stock (in shares)		-4,000
Acquisition of treasury stock	-49,804					-49,804
Common stock cash dividends	-15,109			-15,109
Ending Balance at Mar. 31, 2014	2,058,719	544,821	1,434,546	490,517	-21,889	-389,276
Ending Balance (in shares) at Mar. 31, 2014		188,850
Beginning Balance at Dec. 31, 2014	1,996,665	545,555	1,420,523	558,810	-17,722	-510,501
Beginning Balance (in shares) at Dec. 31, 2014		178,924
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	40,036			40,036
Other comprehensive income	7,922				7,922
Stock issued, including related tax benefits	1,941	179	418			1,344
Stock issued, including related tax benefits (in shares)		174
Stock-based compensation awards	1,071		1,071
Common stock cash dividends	-16,122			-16,122
Ending Balance at Mar. 31, 2015	$2,031,513	$545,734	$1,422,012	$582,724	($9,800)	($509,157)
Ending Balance (in shares) at Mar. 31, 2015		179,098

Consolidated_Statements_of_Sha1

Consolidated Statements of Shareholders' Equity (Parenthetical) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Statement of Stockholders' Equity [Abstract]
Cash dividends per share	$0.09	$0.08

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$40,036	$41,783
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	-3,700	2,500
Depreciation and amortization of premises and equipment	7,361	6,629
Net amortization of investment securities premiums	1,431	1,435
Net gains on sales of investment securities	-4,145	0
Net increase in loans held for sale	-16,602	-3,066
Amortization of intangible assets	130	315
Stock-based compensation	1,071	1,033
Excess tax benefits from stock-based compensation	-15	-25
(Increase) decrease in accrued interest receivable	-398	661
(Increase) decrease in other assets	-5,525	7,271
Increase in accrued interest payable	312	1,754
Increase in other liabilities	10,553	182
Total adjustments	-9,527	18,689
Net cash provided by operating activities	30,509	60,472
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sales of securities available for sale	11,567	12,548
Proceeds from maturities of securities available for sale	105,647	79,045
Purchase of securities available for sale	-37,142	-11,700
Increase in short-term investments	-280,584	-58,901
Net (increase) decrease in loans	-6,362	40,017
Net purchases of premises and equipment	-7,575	-6,255
Net cash (used in) provided by investing activities	-214,449	54,754
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase in demand and savings deposits	171,022	94,093
Net (decrease) increase in time deposits	-24,031	84,638
Increase (decrease) in short-term borrowings	80,386	-188,945
Repayments of long-term debt	-44,896	-123
Net proceeds from issuance of common stock	1,926	2,152
Excess tax benefits from stock-based compensation	15	25
Dividends paid	-14,314	-15,413
Acquisition of treasury stock	0	-49,804
Net cash provided by (used in) financing activities	170,108	-73,377
Net (Decrease) Increase in Cash and Due From Banks	-13,832	41,849
Cash and Due From Banks at Beginning of Period	105,702	218,540
Cash and Due From Banks at End of Period	91,870	260,389
Cash paid during the period for:
Interest	21,879	17,473
Income taxes	$146	$631

Basis_of_Presentation

Basis of Presentation	3 Months Ended
Basis of Presentation	Mar. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation

	The accompanying unaudited consolidated financial statements of Fulton Financial Corporation (the "Corporation") have been prepared in conformity with U.S. generally accepted accounting principles ("U.S. GAAP") for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and notes required by U.S. GAAP for complete financial statements. The preparation of financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the amounts of assets and liabilities as of the date of the financial statements as well as revenues and expenses during the period. Actual results could differ from those estimates. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in the Company's Annual Report on Form 10-K for the year ended December 31, 2014. Operating results for the three months ended March 31, 2015 are not necessarily indicative of the results that may be expected for the year ending December 31, 2015. The Corporation evaluates subsequent events through the date of filing of this Form 10-Q with the Securities and Exchange Commission ("SEC").

	Recent Accounting Standards

	Effective January 1, 2015, the Corporation adopted the Financial Accounting Standards Board's ("FASB") Accounting Standards Codification ("ASC") Update 2014-01, "Accounting for Investments in Qualified Affordable Housing Projects." ASC Update 2014-01 provides guidance on accounting for investments made by a reporting entity in flow-through limited liability entities that manage or invest in affordable housing projects that qualify for the low income housing tax credit. The Corporation has made certain investments in partnerships that generate tax credits under various federal programs which promote investment in low and moderate income housing and local economic development. The net income tax benefit associated with these investments, which consists of the amortization of the investments net of tax benefits, and the income tax credits earned on the investments recorded in income taxes on the consolidated income statements was $2.5 million for the three months ended March 31, 2015 and 2014. As of March 31, 2015 and December 31, 2014, the Corporation’s tax credit investments, included in other assets on the consolidated balance sheets, totaled $164.9 million and $155.6 million, respectively. The adoption of this ASC update did not have a material impact on the Corporation's consolidated financial statements for the three months ended March 31, 2015 or 2014.

	In February 2015, the FASB issued ASC Update 2015-02, "Consolidation: Amendments to the Consolidation Analysis." ASC Update 2015-02 changes the way reporting enterprises evaluate whether: (a) they should consolidate limited partnerships and similar entities, (b) fees paid to a decision maker or service provider are variable interests in a variable interest entity ("VIE"), and (c) variable interests in a VIE held by related parties of the reporting enterprise require the reporting enterprise to consolidate the VIE. ASC Update 2015-02 is effective for public business entities' annual and interim reporting periods beginning after December 15, 2015, with earlier adoption permitted. The Corporation intends to adopt this standards update effective with its March 31, 2016 quarterly report on Form 10-Q, and does not expect the adoption of ASC Update 2015-02 to have a material impact on its consolidated financial statements.

	In April 2015, the FASB issued ASC Update 2015-03, "Interest - Imputation of Interest." ASC Update 2015-03 simplifies the presentation of debt issuances costs. Debt issuance costs related to a recognized debt liability will be presented on the balance sheet as a direct deduction from the debt liability, similar to the presentation of debt discounts. Under current U.S. GAAP, debt issuance costs are reported on the balance sheet as assets. The costs will continue to be amortized to interest expense using the effective interest method. ASC Update 2015-03 is effective for public business entities' annual and interim reporting periods beginning after December 15, 2015, with earlier adoption permitted. The Corporation intends to adopt this standards update effective with its March 31, 2016 quarterly report on Form 10-Q and does not expect the adoption of ASC Update 2015-03 to have a material impact on its consolidated financial statements.

	In April 2015, the FASB issued ASC Update 2015-05, "Customer's Accounting for Fees Paid in a Cloud Computing Arrangement." ASC Update 2015-05 provides explicit guidance to determine when a customer's fees paid in a cloud computing arrangement is for the acquisition of software licenses, services, or both. ASC Update 2015-05 is effective for public business entities' annual and interim reporting periods beginning after December 15, 2015, with earlier adoption permitted. The Corporation intends to adopt this standards update effective with its March 31, 2016 quarterly report on Form 10-Q and does not expect the adoption of ASC Update 2015-05 to have a material impact on its consolidated financial statements.

Net_Income_Per_Share

Net Income Per Share	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Net Income Per Share	Net Income Per Share
	Basic net income per share is calculated as net income divided by the weighted average number of shares outstanding.
	Diluted net income per share is calculated as net income divided by the weighted average number of shares outstanding plus the incremental number of shares added as a result of converting common stock equivalents, calculated using the treasury stock method. The Corporation’s common stock equivalents consist of outstanding stock options, restricted stock, restricted stock units ("RSUs") and performance based restricted stock units ("PSUs"). PSUs are required to be included in weighted average shares outstanding if performance measures, as defined in each PSU award agreement, are met as of the end of the period.
	A reconciliation of weighted average shares outstanding used to calculate basic net income per share and diluted net income per share follows:


		Three months ended March 31
		2015	2014
		(in thousands)
	Weighted average shares outstanding (basic)	178,471	189,467

	Impact of common stock equivalents	986	1,022

	Weighted average shares outstanding (diluted)	179,457	190,489

	For the three months ended March 31, 2015 and 2014, 2.1 million and 3.1 million shares issuable under stock options, respectively, were excluded from the diluted net income per share computation as their effect would have been anti-dilutive.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income
	The following table presents changes in other comprehensive income:


		Before-Tax Amount			Tax Effect			Net of Tax Amount
		(in thousands)
	Three months ended March 31, 2015
	Unrealized gain on securities	$	15,371		$	(5,379	)	$	9,992

	Reclassification adjustment for securities gains included in net income (1)	(4,145		)	1,450			(2,695		)

	Non-credit related unrealized gains on other-than-temporarily impaired debt securities	192			(67		)	125

	Unrealized gain on derivative financial instruments	52			(18		)	34

	Amortization of net unrecognized pension and postretirement items (2)	717			(251		)	466

	Total Other Comprehensive Income	$	12,187		$	(4,265	)	$	7,922

	Three months ended March 31, 2014
	Unrealized gain on securities	$	21,435		$	(7,502	)	$	13,933

	Reclassification adjustment for postretirement gains included in net income (2)	(1,452		)	508			(944		)

	Non-credit related unrealized gains on other-than-temporarily impaired debt securities	291			(102		)	189

	Unrealized gain on derivative financial instruments	52			(18		)	34

	Unrecognized pension and postretirement income	3,291			(1,147		)	2,144

	Amortization of net unrecognized pension and postretirement items (2)	149			(53		)	96

	Total Other Comprehensive Income	$	23,766		$	(8,314	)	$	15,452



	-1	Amounts reclassified out of accumulated other comprehensive income. Before-tax amounts included within "Investment securities gains, net" on the consolidated statements of income. See Note 4, "Investment Securities," for additional details.

	-2	Amounts reclassified out of accumulated other comprehensive income. Before-tax amounts included within "Salaries and employee benefits" on the consolidated statements of income. See Note 8, "Employee Benefit Plans," for additional details.


	The following table presents changes in each component of accumulated other comprehensive income, net of tax:


		Unrealized Gains (Losses) on Investment Securities Not Other-Than-Temporarily Impaired			Unrealized Non-Credit Gains (Losses) on Other-Than-Temporarily Impaired Debt Securities			Unrealized Effective Portions of Losses on Forward-Starting Interest Rate Swaps			Unrecognized Pension and Postretirement Plan Income (Costs)			Total
		(in thousands)
	Three months ended March 31, 2015
	Balance at December 31, 2014	$	5,980		$	1,349		$	(2,546	)	$	(22,505	)	$	(17,722	)

	Other comprehensive income before reclassifications	9,992			125			—			—			10,117

	Amounts reclassified from accumulated other comprehensive income (loss)	(1,661		)	(1,034		)	34			466			(2,195		)

	Balance at March 31, 2015	$	14,311		$	440		$	(2,512	)	$	(22,039	)	$	(9,800	)

	Three months ended March 31, 2014

	Balance at December 31, 2013	$	(27,510	)	$	1,652		$	(2,682	)	$	(8,801	)	$	(37,341	)

	Other comprehensive income before reclassifications	13,933			189			—			2,144			16,266

	Amounts reclassified from accumulated other comprehensive income (loss)	—			—			34			(848		)	(814		)

	Balance at March 31, 2014	$	(13,577	)	$	1,841		$	(2,648	)	$	(7,505	)	$	(21,889	)

Investment_Securities

Investment Securities	3 Months Ended
	Mar. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities
	The following table presents the amortized cost and estimated fair values of investment securities, which were all classified as available for sale:


		Amortized				Gross				Gross				Estimated
		Cost				Unrealized				Unrealized				Fair
						Gains				Losses				Value
		(in thousands)
	31-Mar-15
	Equity securities	$	29,224			$	11,397			$	(13	)		$	40,608

	U.S. Government sponsored agency securities	198				5				—				203

	State and municipal securities	216,877				7,496				(31		)		224,342

	Corporate debt securities	99,120				3,929				(5,367		)		97,682

	Collateralized mortgage obligations	874,853				5,924				(12,901		)		867,876

	Mortgage-backed securities	910,418				20,859				(1,118		)		930,159

	Auction rate securities	106,410				—				(7,478		)		98,932

		$	2,237,100			$	49,610			$	(26,908	)		$	2,259,802



		Amortized				Gross				Gross				Estimated
		Cost				Unrealized				Unrealized				Fair
						Gains				Losses				Value
		(in thousands)
	31-Dec-14
	Equity securities	$	33,469			$	14,167			$	(13	)		$	47,623

	U.S. Government securities	200				—				—				200

	U.S. Government sponsored agency securities	209				5				—				214

	State and municipal securities	238,250				7,231				(266		)		245,215

	Corporate debt securities	99,016				5,126				(6,108		)		98,034

	Collateralized mortgage obligations	917,395				5,705				(20,787		)		902,313

	Mortgage-backed securities	914,797				16,978				(2,944		)		928,831

	Auction rate securities	108,751				—				(7,810		)		100,941

		$	2,312,087			$	49,212			$	(37,928	)		$	2,323,371

	Securities carried at $1.6 billion as of March 31, 2015 and $1.7 billion as of December 31, 2014 were pledged as collateral to secure public and trust deposits and customer repurchase agreements.
	Equity securities include common stocks of financial institutions (estimated fair value of $34.7 million at March 31, 2015 and $41.8 million at December 31, 2014) and other equity investments (estimated fair value of $5.9 million at March 31, 2015 and $5.8 million at December 31, 2014).
	As of March 31, 2015, the financial institutions stock portfolio had a cost basis of $23.4 million and an estimated fair value of $34.7 million, including an investment in a single financial institution with a cost basis of $15.7 million and an estimated fair value of $23.2 million. The estimated fair value of this investment accounted for 66.7% of the estimated fair value of the Corporation's investments in the common stocks of publicly traded financial institutions. No other investment within the financial institutions stock portfolio exceeded 5% of the portfolio's estimated fair value.
	The amortized cost and estimated fair values of debt securities as of March 31, 2015, by contractual maturity, are shown in the following table. Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.


			Amortized				Estimated
			Cost				Fair Value
		(in thousands)
	Due in one year or less		$	29,323			$	30,124

	Due from one year to five years		74,801				78,246

	Due from five years to ten years		140,219				144,978

Due after ten years		178,262				167,811

		422,605				421,159

Collateralized mortgage obligations		874,853				867,876

Mortgage-backed securities		910,418				930,159

		$	2,207,876			$	2,219,194

The following table presents information related to the gross realized gains and losses on the sales of equity and debt securities:


	Gross				Gross				Net Gains (Losses)
	Realized				Realized
	Gains				Losses
Three months ended March 31, 2015	(in thousands)
Equity securities	$	1,970			$	—			$	1,970

Debt securities	2,175				—				2,175

Total	$	4,145			$	—			$	4,145

Three months ended March 31, 2014
Equity securities	$	1			$	—			$	1

Debt securities	322				(323		)		(1		)

Total	$	323			$	(323	)		$	—


The following table presents a summary of the cumulative credit related other-than-temporary impairment charges, recognized as components of earnings, for debt securities held by the Corporation at March 31, 2015 and 2014:


	Three months ended March 31
	2015				2014
	(in thousands)
Balance of cumulative credit losses on debt securities, beginning of period	$	(16,242	)		$	(20,691	)
Reductions for securities sold during the period	3,938				—

Reductions for increases in cash flows expected to be collected that are recognized over the remaining life of the security	2				4

Balance of cumulative credit losses on debt securities, end of period	$	(12,302	)		$	(20,687	)





The following table presents the gross unrealized losses and estimated fair values of investments, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at March 31, 2015:


	Less than 12 months								12 months or longer							Total
	Estimated				Unrealized				Estimated				Unrealized			Estimated		Unrealized
	Fair Value				Losses				Fair Value				Losses			Fair Value		Losses
	(in thousands)
State and municipal securities	$	5,953			$	(31	)		$	—			$	—		$	5,953	$	(31	)

Corporate debt securities	4,970				(4		)		34,600				(5,363		)	39,570		(5,367		)

Collateralized mortgage obligations	34,287				(132		)		547,418				(12,769		)	581,705		(12,901		)

Mortgage-backed securities	116,136				(327		)		72,224				(791		)	188,360		(1,118		)

Auction rate securities	—				—				98,932				(7,478		)	98,932		(7,478		)

Total debt securities	161,346				(494		)		753,174				(26,401		)	914,520		(26,895		)

Equity securities	—				—				77				(13		)	77		(13		)

	$	161,346			$	(494	)		$	753,251			$	(26,414	)	$	914,597	$	(26,908	)

The Corporation’s collateralized mortgage obligations and mortgage-backed securities have contractual terms that generally do not permit the issuer to settle the securities at a price less than the amortized cost of the investment. Because the decline in market value of these securities is attributable to changes in interest rates and not credit quality, and because the Corporation does not have the intent to sell and does not believe it will more likely than not be required to sell any of these securities prior to a recovery of their fair value to amortized cost, the Corporation does not consider these investments to be other-than-temporarily impaired as of March 31, 2015.
The unrealized holding losses on auction rate securities (auction rate certificates, or "ARCs"), are attributable to liquidity issues resulting from the failure of periodic auctions. The Corporation had previously purchased ARCs for investment management and trust customers as short-term investments with fair values that could be derived based on periodic auctions under normal market conditions. During 2008 and 2009, the Corporation purchased ARCs from these customers due to the failure of these periodic auctions, which made these previously short-term investments illiquid.
As of March 31, 2015, all of the ARCs were rated above investment grade, with approximately $6 million, or 5%, "AAA" rated and $93 million, or 95%, "AA" rated. All of the loans underlying the ARCs have principal payments which are guaranteed by the federal government.
As of March 31, 2015, all ARCs were current and making scheduled interest payments. Based on management’s evaluations, ARCs with an estimated fair value of $98.9 million were not subject to any other-than-temporary impairment charges as of March 31, 2015. The Corporation does not have the intent to sell and does not believe it will more likely than not be required to sell any of these securities prior to a recovery of their fair value to amortized cost, which may be at maturity.
For its investments in equity securities, particularly its investments in stocks of financial institutions, management evaluates the near-term prospects of the issuers in relation to the severity and duration of the impairment. Based on that evaluation and the Corporation’s ability and intent to hold those investments for a reasonable period of time sufficient for a recovery of fair value, the Corporation does not consider those investments with unrealized holding losses as of March 31, 2015 to be other-than-temporarily impaired.
The majority of the Corporation's available for sale corporate debt securities are issued by financial institutions. The following table presents the amortized cost and estimated fair value of corporate debt securities:


	March 31, 2015								December 31, 2014
	Amortized				Estimated				Amortized				Estimated
	cost				fair value				cost				fair value
	(in thousands)
Single-issuer trust preferred securities	$	47,590			$	42,863			$	47,569			$	42,016

Subordinated debt	47,563				50,173				47,530				50,023

Pooled trust preferred securities	405				1,084				2,010				4,088

Corporate debt securities issued by financial institutions	95,558				94,120				97,109				96,127

Other corporate debt securities	3,562				3,562				1,907				1,907

Available for sale corporate debt securities	$	99,120			$	97,682			$	99,016			$	98,034


The Corporation’s investments in single-issuer trust preferred securities had an unrealized loss of $4.7 million at March 31, 2015. The Corporation did not record any other-than-temporary impairment charges for single-issuer trust preferred securities during the three months ended March 31, 2015 or 2014. Seven of the Corporation's 20 single-issuer trust preferred securities were rated below investment grade by at least one ratings agency, with an amortized cost of $14.5 million and an estimated fair value of $12.8 million at March 31, 2015. All of the single-issuer trust preferred securities rated below investment grade were rated "BB" or "Ba". Three single-issuer trust preferred securities with an amortized cost of $4.7 million and an estimated fair value of $3.8 million at March 31, 2015 were not rated by any ratings agency.
During the three months ended March 31, 2015, the Corporation sold two pooled trust preferred securities with a total amortized cost of $1.5 million, for a gain of $2.2 million. As of March 31, 2015, all three of the Corporation's pooled trust preferred securities, with an amortized cost of $405,000 and an estimated fair value of $1.1 million, were rated below investment grade by at least one ratings agency, with ratings ranging from "C" to "Ca". The class of securities held by the Corporation was below the most senior tranche, with the Corporation’s interests being subordinate to other investors in the pool. The Corporation determines the fair value of pooled trust preferred securities based on quotes provided by third-party brokers.
The amortized cost of pooled trust preferred securities is the purchase price of the securities, net of cumulative credit related other-than-temporary impairment charges, determined using an expected cash flows model. The most significant input to the expected cash flows model is the expected payment deferral rate for each pooled trust preferred security. The Corporation evaluates the financial metrics, such as capital ratios and non-performing assets ratios, of the individual financial institution issuers that comprise each pooled trust preferred security to estimate its expected deferral rate.
Based on management’s evaluations, corporate debt securities with a fair value of $97.7 million were not subject to any additional other-than-temporary impairment charges as of March 31, 2015. The Corporation does not have the intent to sell and does not believe it will more likely than not be required to sell any of these securities prior to a recovery of their fair value to amortized cost, which may be at maturity.

Loans_and_Allowance_for_Credit

Loans and Allowance for Credit Losses	3 Months Ended
	Mar. 31, 2015
Receivables [Abstract]
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]	Loans and Allowance for Credit Losses

	Loans, Net of Unearned Income
	Loans, net of unearned income are summarized as follows:


		March 31,				31-Dec-14
		2015
		(in thousands)
	Real-estate - commercial mortgage	$	5,227,101			$	5,197,155

	Commercial - industrial, financial and agricultural	3,762,631				3,725,567

	Real-estate - home equity	1,701,623				1,736,688

	Real-estate - residential mortgage	1,364,788				1,377,068

	Real-estate - construction	677,806				690,601

	Consumer	257,301				265,431

	Leasing and other	135,552				127,562

	Overdrafts	1,721				4,021

	Loans, gross of unearned income	13,128,523				13,124,093

	Unearned income	(13,018		)		(12,377		)
	Loans, net of unearned income	$	13,115,505			$	13,111,716


	Allowance for Credit Losses
	The allowance for credit losses consists of the allowance for loan losses and the reserve for unfunded lending commitments. The allowance for loan losses represents management’s estimate of incurred losses in the loan portfolio as of the balance sheet date and is recorded as a reduction to loans. The reserve for unfunded lending commitments represents management’s estimate of incurred losses in its unfunded loan commitments and is recorded in other liabilities on the consolidated balance sheet. The allowance for credit losses is increased by charges to expense, through the provision for credit losses, and decreased by charge-offs, net of recoveries.

	The Corporation’s allowance for credit losses includes: (1) specific allowances allocated to loans evaluated for impairment under the FASB's ASC Section 310-10-35; and (2) allowances calculated for pools of loans measured for impairment under FASB ASC Subtopic 450-20.

	The Corporation segments its loan portfolio by general loan type, or "portfolio segments," as presented in the table under the heading, "Loans, Net of Unearned Income," above. Certain portfolio segments are further disaggregated and evaluated collectively for impairment based on "class segments," which are largely based on the type of collateral underlying each loan. Commercial loans include loans secured by collateral and unsecured loans. Construction loan class segments include loans secured by commercial real estate, loans to commercial borrowers secured by residential real estate and loans to individuals secured by residential real estate. Consumer loan class segments include direct consumer installment loans and indirect automobile loans.

	The following table presents the components of the allowance for credit losses:


		March 31,				December 31,
		2015				2014
		(in thousands)
	Allowance for loan losses	$	177,701			$	184,144

	Reserve for unfunded lending commitments	1,957				1,787

	Allowance for credit losses	$	179,658			$	185,931

	The following table presents the activity in the allowance for credit losses:


		Three months ended March 31
		2015				2014
		(in thousands)
	Balance at beginning of period	$	185,931			$	204,917

	Loans charged off	(5,764		)		(10,268		)
	Recoveries of loans previously charged off	3,191				1,857

	Net loans charged off	(2,573		)		(8,411		)
	Provision for credit losses	(3,700		)		2,500

Balance at end of period	$	179,658			$	199,006


The following table presents the activity in the allowance for loan losses by portfolio segment:


	Real Estate -				Commercial -				Real Estate -			Real Estate -			Real Estate -			Consumer			Leasing			Unallocated			Total
	Commercial				Industrial,				Home			Residential			Construction						and other
	Mortgage				Financial and				Equity			Mortgage									and
					Agricultural																overdrafts
	(in thousands)
Three months ended March 31, 2015
Balance at December 31, 2014	$	53,493			$	51,378			$	28,271		$	29,072		$	9,756		$	3,015		$	1,799		$	7,360		$	184,144

Loans charged off	(709		)		(1,863		)		(768		)	(1,281		)	—			(780		)	(363		)	—			(5,764		)

Recoveries of loans previously charged off	436				786				251			159			1,147			241			171			—			3,191

Net loans charged off	(273		)		(1,077		)		(517		)	(1,122		)	1,147			(539		)	(192		)	—			(2,573		)

Provision for loan losses (1)	(360		)		6,849				(4,273		)	(4,715		)	(2,416		)	51			46			948			(3,870		)

Balance at March 31, 2015	$	52,860			$	57,150			$	23,481		$	23,235		$	8,487		$	2,527		$	1,653		$	8,308		$	177,701

Three months ended March 31, 2014
Balance at December 31, 2013	$	55,659			$	50,330			$	28,222		$	33,082		$	12,649		$	3,260		$	3,370		$	16,208		$	202,780

Loans charged off	(1,386		)		(5,125		)		(1,651		)	(846		)	(214		)	(751		)	(295		)	—			(10,268		)

Recoveries of loans previously charged off	44				744				356			116			224			209			164			—			1,857

Net loans charged off	(1,342		)		(4,381		)		(1,295		)	(730		)	10			(542		)	(131		)	—			(8,411		)

Provision for loan losses (1)	(560		)		4,614				5,533			977			(2,817		)	606			(1,228		)	(4,405		)	2,720

Balance at March 31, 2014	$	53,757			$	50,563			$	32,460		$	33,329		$	9,842		$	3,324		$	2,011		$	11,803		$	197,089



-1	The provision for loan losses excluded a $170,000 increase and $220,000 decrease in the reserve for unfunded lending commitments for the three months ended March 31, 2015 and March 31, 2014, respectively. The total provision for credit losses, comprised of allocations for both funded and unfunded loans, was a negative $3.7 million for the three months ended March 31, 2015 and was $2.5 million for the three months ended March 31, 2014.
The following table presents loans, net of unearned income and their related allowance for loan losses, by portfolio segment:


	Real Estate -				Commercial -				Real Estate -			Real Estate -			Real Estate -			Consumer			Leasing			Unallocated			Total
	Commercial				Industrial,				Home			Residential			Construction						and other			-1
	Mortgage				Financial and				Equity			Mortgage									and
					Agricultural																overdrafts
	(in thousands)
Allowance for loan losses at March 31, 2015:
Measured for impairment under FASB ASC Subtopic 450-20	$	38,916			$	40,027			$	16,937		$	9,162		$	6,037		$	2,504		$	1,653		$	8,308		$	123,544

Evaluated for impairment under FASB ASC Section 310-10-35	13,944				17,123				6,544			14,073			2,450			23			—			N/A			54,157

	$	52,860			$	57,150			$	23,481		$	23,235		$	8,487		$	2,527		$	1,653		$	8,308		$	177,701


Loans, net of unearned income at March 31, 2015:
Measured for impairment under FASB ASC Subtopic 450-20	$	5,157,342			$	3,716,037			$	1,688,869		$	1,312,861		$	656,021		$	257,265		$	124,255		N/A			$	12,912,650

Evaluated for impairment under FASB ASC Section 310-10-35	69,759				46,594				12,754			51,927			21,785			36			—			N/A			202,855

	$	5,227,101			$	3,762,631			$	1,701,623		$	1,364,788		$	677,806		$	257,301		$	124,255		N/A			$	13,115,505


Allowance for loan losses at March 31, 2014:
Measured for impairment under FASB ASC Subtopic 450-20	$	37,363			$	36,859			$	22,969		$	11,618		$	7,256		$	3,309		$	2,011		$	11,803		$	133,188

Evaluated for impairment under FASB ASC Section 310-10-35	16,394				13,704				9,491			21,711			2,586			15			—			N/A			63,901

	$	53,757			$	50,563			$	32,460		$	33,329		$	9,842		$	3,324		$	2,011		$	11,803		$	197,089


Loans, net of unearned income at March 31, 2014:
Measured for impairment under FASB ASC Subtopic 450-20	$	5,075,556			$	3,528,857			$	1,726,342		$	1,279,783		$	555,852		$	270,004		$	96,009		N/A			$	12,532,403

Evaluated for impairment under FASB ASC Section 310-10-35	61,898				45,273				14,154			51,682			28,365			17			—			N/A			201,389

	$	5,137,454			$	3,574,130			$	1,740,496		$	1,331,465		$	584,217		$	270,021		$	96,009		N/A			$	12,733,792



-1	The unallocated allowance, which was approximately 5% and 6% of the total allowance for credit losses as of March 31, 2015 and March 31, 2014, respectively, was, in the opinion of management, reasonable and appropriate given that the estimates used in the allocation process are inherently imprecise.
N/A Not applicable.

Impaired Loans
A loan is considered to be impaired if it is probable that all amounts will not be collected according to the contractual terms of the loan agreement. Impaired loans consist of all loans on non-accrual status and accruing troubled debt restructurings ("TDRs"). An allowance for loan losses is established for an impaired loan if its carrying value exceeds its estimated fair value. Impaired loans to borrowers with total outstanding commitments greater than or equal to $1.0 million are evaluated individually for impairment. Impaired loans to borrowers with total outstanding commitments less than $1.0 million are pooled and measured for impairment collectively.

Based on an evaluation of all relevant credit quality factors, the Corporation recorded a $3.7 million negative provision for credit losses during the three months ended March 31, 2015, compared to a $2.5 million provision for credit losses for the same period in 2014. The $6.2 million improvement in the provision for credit losses was driven by an improvement in net charge-off levels, particularly a decrease in net charge-offs on pooled impaired loans across all loan portfolio segments. During the three months ended March 31, 2015, net charge-offs were $2.6 million, compared to $8.4 million for the three months ended March 31, 2014, and the allowance for loan loss allocations on impaired loans decreased $9.7 million, or 15.2%, compared to the three months ended March 31, 2014.
All loans individually evaluated for impairment under FASB ASC Section 310-10-35 are measured for losses on a quarterly basis.
As of March 31, 2015 and December 31, 2014, substantially all of the Corporation’s individually evaluated impaired loans with total outstanding balances greater than or equal to $1.0 million were measured based on the estimated fair value of each loan’s collateral. Collateral could be in the form of real estate, in the case of impaired commercial mortgages and construction loans, or business assets, such as accounts receivable or inventory, in the case of commercial and industrial loans. Commercial and industrial loans may also be secured by real property.

As of March 31, 2015 and 2014, approximately 78% and 79%, respectively, of impaired loans with principal balances greater than or equal to $1.0 million, whose primary collateral is real estate, were measured at estimated fair value using state certified third-party appraisals that had been updated within the preceding 12 months.

When updated appraisals are not obtained for loans evaluated for impairment under FASB ASC Section 310-10-35 that are secured by real estate, fair values are estimated based on the original appraisal values, as long as the original appraisal indicated a strong loan-to-value position and, in the opinion of the Corporation's internal loan evaluation staff, there has not been a significant deterioration in the collateral value since the original appraisal was performed. Original appraisals are typically used only when the estimated collateral value, as adjusted appropriately for the age of the appraisal, results in a current loan-to-value ratio that is lower than the Corporation's loan-to-value requirements for new loans, generally less than 70%.
The following table presents total impaired loans by class segment:


	March 31, 2015											December 31, 2014
	Unpaid				Recorded				Related			Unpaid			Recorded			Related
	Principal				Investment				Allowance			Principal			Investment			Allowance
	Balance											Balance
	(in thousands)
With no related allowance recorded:
Real estate - commercial mortgage	$	35,586			$	30,462			$	—		$	25,802		$	23,236		$	—

Commercial - secured	17,832				14,769				—			17,599			14,582			—

Real estate - residential mortgage	4,858				4,858				—			4,873			4,873			—

Construction - commercial residential	16,448				13,643				—			18,041			14,801			—

Construction - commercial	829				694				—			1,707			1,581			—

	75,553				64,426							68,022			59,073

With a related allowance recorded:
Real estate - commercial mortgage	48,636				39,297				13,944			49,619			40,023			16,715

Commercial - secured	35,825				30,565				16,315			24,824			19,335			12,165

Commercial - unsecured	1,417				1,260				808			1,241			1,089			865

Real estate - home equity	18,035				12,754				6,544			19,392			13,458			9,224

Real estate - residential mortgage	56,684				47,069				14,073			56,607			46,478			18,592

Construction - commercial residential	13,267				6,590				2,169			14,007			7,903			2,675

Construction - commercial	867				577				178			1,501			1,023			459

Construction - other	452				281				103			452			281			137

Consumer - direct	17				17				11			19			19			17

Consumer - indirect	41				19				12			20			19			18

	175,241				138,429				54,157			167,682			129,628			60,867

Total	$	250,794			$	202,855			$	54,157		$	235,704		$	188,701		$	60,867

As of March 31, 2015 and December 31, 2014, there were $64.4 million and $59.1 million, respectively, of impaired loans that did not have a related allowance for loan loss. The estimated fair values of the collateral securing these loans exceeded their carrying amount, or they were previously charged down to realizable collateral values. Accordingly, no specific valuation allowance was considered to be necessary.
The following table presents average impaired loans by class segment:


	Three months ended March 31
	2015								2014
	Average				Interest				Average			Interest
	Recorded				Income				Recorded			Income
	Investment				Recognized (1)				Investment			Recognized (1)
	(in thousands)
With no related allowance recorded:
Real estate - commercial mortgage	$	26,849			$	91			$	23,993		$	86

Commercial - secured	14,676				21				21,125			35

Real estate - home equity	—				—				300			—

Real estate - residential mortgage	4,866				28				159			1

Construction - commercial residential	14,222				55				17,223			60

Construction - commercial	1,138				—				1,969			—

	61,751				195				64,769			182

With a related allowance recorded:
Real estate - commercial mortgage	39,660				133				37,119			132

Commercial - secured	24,950				36				23,045			38

Commercial - unsecured	1,175				1				845			1

Real estate - home equity	13,106				31				14,096			20

Real estate - residential mortgage	46,774				273				51,231			294

Construction - commercial residential	7,247				28				9,771			35

Construction - commercial	800				—				193			—

Construction - other	281				—				546			—

Consumer - direct	18				—				13			—

Consumer - indirect	19				—				2			—

	134,030				502				136,861			520

Total	$	195,781			$	697			$	201,630		$	702



-1	All impaired loans, excluding accruing TDRs, were non-accrual loans. Interest income recognized for the three months ended March 31, 2015 and 2014 represents amounts earned on accruing TDRs.

Credit Quality Indicators and Non-performing Assets

The following table presents internal credit risk ratings for real estate - commercial mortgages, commercial - secured loans, commercial - unsecured loans, construction - commercial residential loans and construction - commercial loans:


	Pass								Special Mention						Substandard or Lower						Total
	March 31, 2015				December 31, 2014				March 31, 2015			December 31, 2014			March 31, 2015			December 31, 2014			March 31, 2015			December 31, 2014
	(dollars in thousands)
Real estate - commercial mortgage	$	4,919,760			$	4,899,016			$	123,644		$	127,302		$	183,697		$	170,837		$	5,227,101		$	5,197,155

Commercial - secured	3,344,506				3,333,486				151,724			120,584			112,156			110,544			3,608,386			3,564,614

Commercial - unsecured	142,536				146,680				3,331			7,463			8,378			6,810			154,245			160,953

Total commercial - industrial, financial and agricultural	3,487,042				3,480,166				155,055			128,047			120,534			117,354			3,762,631			3,725,567

Construction - commercial residential	173,833				136,109				20,662			27,495			37,038			40,066			231,533			203,670

Construction - commercial	378,131				409,631				11,802			12,202			3,475			5,586			393,408			427,419

Total construction (excluding Construction - other)	551,964				545,740				32,464			39,697			40,513			45,652			624,941			631,089

	$	8,958,766			$	8,924,922			$	311,163		$	295,046		$	344,744		$	333,843		$	9,614,673		$	9,553,811

% of Total	93.2		%		93.4		%		3.2		%	3.1		%	3.6		%	3.5		%	100		%	100		%

The following is a summary of the Corporation's internal risk rating categories:

•	Pass: These loans do not currently pose undue credit risk and can range from the highest to average quality, depending on the degree of potential risk.

•	Special Mention: These loans constitute an undue and unwarranted credit risk, but not to a point of justifying a classification of substandard. Loans in this category are currently acceptable, but are nevertheless potentially weak.

•	Substandard or Lower: These loans are inadequately protected by current sound worth and paying capacity of the borrower. There exists a well-defined weakness or weaknesses that jeopardize the normal repayment of the debt.

The risk rating process allows management to identify riskier credits in a timely manner and to allocate resources to managing troubled accounts.The Corporation believes that internal risk ratings are the most relevant credit quality indicator for the class segments presented above. The migration of loans through the various internal risk rating categories is a significant component of the allowance for credit loss methodology, which bases the probability of default on this migration. Assigning risk ratings involves judgment. Risk ratings are initially assigned to loans by loan officers and are reviewed on a regular basis by credit administration staff. The Corporation's loan review officers provide a separate assessment of risk rating accuracy. Ratings may be changed based on the ongoing monitoring procedures performed by loan officers or credit administration staff, or if specific loan review activities identify a deterioration or an improvement in the loan.

The Corporation does not assign internal risk ratings to smaller balance, homogeneous loans, such as home equity, residential mortgage, consumer, lease receivables and construction loans to individuals secured by residential real estate. For these loans, the most relevant credit quality indicator is delinquency status. The migration of loans through the various delinquency status categories is a significant component of the allowance for credit losses methodology for those loans, which bases the probability of default on this migration.
The following table presents a summary of delinquency and non-performing status for home equity, real estate - residential mortgages, construction loans to individuals and consumer, leasing and other loans by class segment:


	Performing								Delinquent (1)						Non-performing (2)						Total
	March 31, 2015				December 31, 2014				March 31, 2015			December 31, 2014			March 31, 2015			December 31, 2014			March 31, 2015			December 31, 2014
	(dollars in thousands)
Real estate - home equity	$	1,674,544			$	1,711,017			$	12,624		$	10,931		$	14,455		$	14,740		$	1,701,623		$	1,736,688

Real estate - residential mortgage	1,312,299				1,321,139				23,894			26,934			28,595			28,995			1,364,788			1,377,068

Construction - other	52,119				59,180				417			—			329			332			52,865			59,512

Consumer - direct	97,959				104,018				2,919			2,891			2,390			2,414			103,268			109,323

Consumer - indirect	152,286				153,358				1,653			2,574			94			176			154,033			156,108

Total consumer	250,245				257,376				4,572			5,465			2,484			2,590			257,301			265,431

Leasing and other and overdrafts	122,255				118,550				1,976			523			24			133			124,255			119,206

	$	3,411,462			$	3,467,262			$	43,483		$	43,853		$	45,887		$	46,790		$	3,500,832		$	3,557,905

% of Total	97.5		%		97.5		%		1.2		%	1.2		%	1.3		%	1.3		%	100		%	100		%


-1	Includes all accruing loans 31 days to 89 days past due.

-2	Includes all accruing loans 90 days or more past due and all non-accrual loans.
The following table presents non-performing assets:


	March 31,				December 31,
	2015				2014
	(in thousands)
Non-accrual loans	$	129,929			$	121,080

Accruing loans greater than 90 days past due	19,365				17,402

Total non-performing loans	149,294				138,482

Other real estate owned (OREO)	14,251				12,022

Total non-performing assets	$	163,545			$	150,504

The following table presents TDRs, by class segment:


	March 31,				December 31,
	2015				2014
	(in thousands)
Real-estate - residential mortgage	$	31,574			$	31,308

Real-estate - commercial mortgage	23,468				18,822

Construction - commercial residential	7,791				9,241

Commercial - secured	6,786				5,170

Real estate - home equity	3,084				2,975

Commercial - unsecured	189				67

Consumer - indirect	17				19

Consumer - direct	17				19

Total accruing TDRs	72,926				67,621

Non-accrual TDRs (1)	29,392				24,616

Total TDRs	$	102,318			$	92,237



-1	Included within non-accrual loans in the preceding table detailing non-performing assets.

As of March 31, 2015 and December 31, 2014, there were $7.1 million and $3.9 million, respectively, of commitments to lend additional funds to borrowers whose loans were modified under TDRs.

The following table presents TDRs, by class segment as of March 31, 2015 and 2014 that were modified during the three months ended March 31, 2015 and 2014:


	2015						2014
	Number of Loans		Recorded Investment				Number of Loans		Recorded Investment
	(dollars in thousands)
Commercial - secured	8		$	6,776			—		$	—

Real estate - commercial mortgage	3		2,495				7		7,470

Construction - commercial residential	1		889				1		548

Real estate - residential mortgage	4		610				6		706

Real estate - home equity	10		492				10		529

Commercial - unsecured	1		42				—		—

Consumer - indirect	1		13				3		1

Consumer - direct	—		—				4		4

Total	28		$	11,317			31		$	9,258


The following table presents TDRs, by class segment as of March 31, 2015 and 2014 that were modified within the previous 12 months and had a post-modification payment default during the three months ended March 31, 2015 and 2014. The Corporation defines a payment default as a single missed payment.


	2015						2014
	Number of Loans		Recorded Investment				Number of Loans		Recorded Investment
	(dollars in thousands)
Commercial - secured	7		$	7,888			1		$	11

Real estate - commercial mortgage	2		1,659				3		126

Construction - commercial residential	1		1,366				1		619

Real estate - home equity	7		816				14		1,432

Real estate - residential mortgage	8		748				12		2,522

Total	25		$	12,477			31		$	4,710

The following table presents past due status and non-accrual loans by portfolio segment and class segment:


	March 31, 2015
	31-59				60-89				≥ 90 Days			Non-			Total ≥ 90			Total Past			Current			Total
	Days Past				Days Past				Past Due			accrual			Days			Due
	Due				Due				and
									Accruing
	(in thousands)
Real estate - commercial mortgage	$	20,528			$	5,620			$	40		$	46,291		$	46,331		$	72,479		$	5,154,622		$	5,227,101

Commercial - secured	8,056				1,002				3,646			38,548			42,194			51,252			3,557,134			3,608,386

Commercial - unsecured	832				58				—			1,071			1,071			1,961			152,284			154,245

Total commercial - industrial, financial and agricultural	8,888				1,060				3,646			39,619			43,265			53,213			3,709,418			3,762,631

Real estate - home equity	10,347				2,277				4,785			9,670			14,455			27,079			1,674,544			1,701,623

Real estate - residential mortgage	16,375				7,519				8,242			20,353			28,595			52,489			1,312,299			1,364,788

Construction - commercial residential	1,559				151				98			12,442			12,540			14,250			217,283			231,533

Construction - commercial	—				—				—			1,271			1,271			1,271			392,137			393,408

Construction - other	417				—				48			281			329			746			52,119			52,865

Total real estate - construction	1,976				151				146			13,994			14,140			16,267			661,539			677,806

Consumer - direct	1,978				941				2,390			—			2,390			5,309			97,959			103,268

Consumer - indirect	1,422				231				92			2			94			1,747			152,286			154,033

Total consumer	3,400				1,172				2,482			2			2,484			7,056			250,245			257,301

Leasing and other and overdrafts	1,666				310				24			—			24			2,000			122,255			124,255

Total	$	63,180			$	18,109			$	19,365		$	129,929		$	149,294		$	230,583		$	12,884,922		$	13,115,505



	31-Dec-14
	31-59				60-89				≥ 90 Days			Non-			Total ≥ 90			Total Past			Current			Total
	Days Past				Days Past				Past Due			accrual			Days			Due
	Due				Due				and
									Accruing
	(in thousands)
Real estate - commercial mortgage	$	14,399			$	3,677			$	800		$	44,437		$	45,237		$	63,313		$	5,133,842		$	5,197,155

Commercial - secured	4,839				958				610			28,747			29,357			35,154			3,529,460			3,564,614

Commercial - unsecured	395				65				9			1,022			1,031			1,491			159,462			160,953

Total commercial - industrial, financial and agricultural	5,234				1,023				619			29,769			30,388			36,645			3,688,922			3,725,567

Real estate - home equity	8,048				2,883				4,257			10,483			14,740			25,671			1,711,017			1,736,688

Real estate - residential mortgage	18,789				8,145				8,952			20,043			28,995			55,929			1,321,139			1,377,068

Construction - commercial residential	160				—				—			13,463			13,463			13,623			190,047			203,670

Construction - commercial	—				—				—			2,604			2,604			2,604			424,815			427,419

Construction - other	—				—				51			281			332			332			59,180			59,512

Total real estate - construction	160				—				51			16,348			16,399			16,559			674,042			690,601

Consumer - direct	2,034				857				2,414			—			2,414			5,305			104,018			109,323

Consumer - indirect	2,156				418				176			—			176			2,750			153,358			156,108

Total consumer	4,190				1,275				2,590			—			2,590			8,055			257,376			265,431

Leasing and other and overdrafts	357				166				133			—			133			656			118,550			119,206

Total	$	51,177			$	17,169			$	17,402		$	121,080		$	138,482		$	206,828		$	12,904,888		$	13,111,716

Mortgage_Servicing_Rights

Mortgage Servicing Rights	3 Months Ended
	Mar. 31, 2015
Transfers and Servicing [Abstract]
Mortgage Servicing Rights	Mortgage Servicing Rights
	The following table summarizes the changes in mortgage servicing rights ("MSRs"), which are included in other assets on the consolidated balance sheets:


		Three months ended March 31
		2015			2014
		(in thousands)
	Amortized cost:
	Balance at beginning of period	$	42,148		$	42,452

	Originations of mortgage servicing rights	1,557			1,115

	Amortization	(1,902		)	(1,899		)
	Balance at end of period	$	41,803		$	41,668

	MSRs represent the economic value of existing contractual rights to service mortgage loans that have been sold. Accordingly, actual and expected prepayments of the underlying mortgage loans can impact the value of MSRs.
	The Corporation estimates the fair value of its MSRs by discounting the estimated cash flows from servicing income, net of expense, over the expected life of the underlying loans at a discount rate commensurate with the risk associated with these assets. Expected life is based on the contractual terms of the loans, as adjusted for prepayment projections. No valuation allowance was necessary as of March 31, 2015 or 2014.
	The Corporation accounts for MSRs at the lower of amortized cost or fair value. As of March 31, 2015, the estimated fair value of MSRs was $43.6 million, which exceeded their book value.

StockBased_Compensation

Stock-Based Compensation	3 Months Ended
	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation
	The Corporation grants equity awards to employees, consisting of stock options, restricted stock, RSUs and PSUs under its Amended and Restated Equity and Cash Incentive Compensation Plan ("Employee Equity Plan"). In addition, employees may purchase stock under the Corporation’s Employee Stock Purchase Plan. The fair value of equity awards granted to employees is recognized as compensation expense over the period during which employees are required to provide service in exchange for such awards. Compensation expense for PSUs is also recognized over the period during which employees are required to provide service in exchange for such awards, however, compensation expense may vary based on the expectations for actual performance relative to defined performance measures.

	The Corporation also grants equity awards to non-employee members of its board of directors under the 2011 Directors’ Equity Participation Plan ("Directors’ Plan"). Under the Directors’ Plan, the Corporation can grant equity awards to non-employee holding company and subsidiary bank directors in the form of stock options, restricted stock or common stock.

	Equity awards issued under the Employee Equity Plan are generally granted annually and become fully vested over or after a three-year vesting period. The vesting period for non-performance based awards represents the period during which employees are required to provide service in exchange for such awards. Equity awards under the Directors' Plan generally vest immediately upon grant. Certain events, as defined in the Employee Equity Plan and the Directors' Plan, result in the acceleration of the vesting of equity awards.

	The following table presents compensation expense and the related tax benefits for equity awards recognized in the consolidated statements of income:


		Three months ended March 31
		2015			2014
		(in thousands)
	Stock-based compensation expense	$	1,071		$	1,033

	Tax benefit	(292		)	(263		)
	Stock-based compensation expense, net of tax	$	779		$	770


	Stock option fair values are estimated through the use of the Black-Scholes valuation methodology as of the date of grant. Stock options carry terms of up to ten years. Fair values for restricted stock, RSUs and a majority of PSUs are based on the trading price of the Corporation’s stock on the date of grant and earn dividends during the vesting period, which are forfeitable if the awards do not vest. The fair value of certain PSUs are estimated through the use of the Monte Carlo valuation methodology as of the date of grant.

	As of March 31, 2015, the Employee Equity Plan had 11.5 million shares reserved for future grants through 2023 and the Directors’ Plan had approximately 410,000 shares reserved for future grants through 2021. On April 1, 2015, the Corporation granted approximately 403,000 PSUs and 139,500 RSUs under its Employee Equity Plan.

Employee_Benefit_Plans

Employee Benefit Plans	3 Months Ended
	Mar. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Employee Benefit Plans	Employee Benefit Plans
	The Corporation maintains a defined benefit pension plan ("Pension Plan") for certain employees, which was curtailed effective January 1, 2008. Contributions to the Pension Plan are actuarially determined and funded annually, if required. Pension Plan assets are invested in: money markets; fixed income securities, including corporate bonds, U.S. Treasury securities and common trust funds; and equity securities, including common stocks and common stock mutual funds.
	The net periodic benefit cost for the Corporation’s Pension Plan consisted of the following components:


		Three months ended March 31
		2015			2014
		(in thousands)
	Service cost (1)	$	145		$	92

	Interest cost	851			853

	Expected return on plan assets	(752		)	(811		)
	Net amortization and deferral	782			244

	Net periodic benefit cost	$	1,026		$	378



	-1	The Pension Plan service cost recorded for the three months ended March 31, 2015 and 2014 was related to administrative costs associated with the plan and was not due to the accrual of additional participant benefits.
	The Corporation currently provides medical and life insurance benefits under a postretirement benefits plan ("Postretirement Plan") to certain retired full-time employees who were employees of the Corporation prior to January 1, 1998.
	Effective February 1, 2014, the Corporation amended the Postretirement Plan, making all active full-time employees ineligible for benefits under this plan. As a result of this amendment, the Corporation recorded a $1.5 million gain during the three months ended March 31, 2014, as a reduction to salaries and employee benefits on the consolidated statements of income. The gain resulted from the recognition of the remaining prior service cost prior to the amendment date as of December 31, 2013. In addition, this amendment resulted in a $3.4 million decrease in the accumulated postretirement benefit obligation and a corresponding increase in unrecognized prior service cost credits.
	The net periodic cost (benefit) of the Corporation’s Postretirement Plan consisted of the following components, excluding the $1.5 million plan amendment gain in 2014:


		Three months ended March 31
		2015			2014
		(in thousands)
	Service cost (1)	$	—		$	15

	Interest cost	52			61

	Net accretion and deferral	(65		)	(95		)
	Net periodic benefit	$	(13	)	$	(19	)


	-1	As a result of the plan amendment, additional participant benefits are not accrued under the Postretirement Plan after February 1, 2014.
	The Corporation recognizes the funded status of its Pension Plan and Postretirement Plan on the consolidated balance sheets and recognizes the change in that funded status through other comprehensive income.

Derivative_Financial_Instrumen

Derivative Financial Instruments	3 Months Ended
	Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments
	The Corporation manages its exposure to certain interest rate and foreign currency risks through the use of derivatives. None of the Corporation's outstanding derivative contracts are designated as hedges and none are entered into for speculative purposes. Derivative instruments are carried at fair value, with changes in fair values recognized in earnings as components of non-interest income and non-interest expense on the consolidated statements of income.
	Derivative contracts create counterparty credit risk with both the Corporation's customers and with institutional derivative counterparties. The Corporation manages counterparty credit risk through its credit approval processes, monitoring procedures and obtaining adequate collateral, when the Corporation determines it is appropriate to do so and in accordance with counterparty contracts.
	Mortgage Banking Derivatives
	In connection with its mortgage banking activities, the Corporation enters into commitments to originate certain fixed rate residential mortgage loans for customers, also referred to as interest rate locks. In addition, the Corporation enters into forward commitments for the future sales or purchases of mortgage-backed securities to or from third-party counterparties to hedge the effect of changes in interest rates on the values of both the interest rate locks and mortgage loans held for sale. Forward sales commitments may also be in the form of commitments to sell individual mortgage loans at a fixed price at a future date. The amount necessary to settle each interest rate lock is based on the price that secondary market investors would pay for loans with similar characteristics, including interest rate and term, as of the date fair value is measured. Gross derivative assets and liabilities are recorded within other assets and other liabilities, respectively, on the consolidated balance sheets, with changes in fair values during the period recorded within mortgage banking income on the consolidated statements of income.
	Interest Rate Swaps
	The Corporation enters into interest rate swaps with certain qualifying commercial loan customers to meet their interest rate risk management needs. The Corporation simultaneously enters into interest rate swaps with dealer counterparties, with identical notional amounts and terms. The net result of these interest rate swaps is that the customer pays a fixed rate of interest and the Corporation receives a floating rate. These interest rate swaps are derivative financial instruments that are recorded at their fair value within other assets and other liabilities on the consolidated balance sheets. Changes in fair value during the period are recorded within other non-interest expense on the consolidated statements of income.
	Foreign Exchange Contracts
	The Corporation enters into foreign exchange contracts to accommodate the needs of its customers. Foreign exchange contracts are commitments to buy or sell foreign currency on a future date at a contractual price. The Corporation offsets its foreign exchange contract exposure with customers by entering into contracts with third-party correspondent financial institutions to mitigate its exposure to fluctuations in foreign currency exchange rates. The Corporation also holds certain amounts of foreign currency with international correspondent banks. The Corporation's policy limits the total net foreign currency open positions, which includes all outstanding contracts and foreign account balances, to $500,000. Gross derivative assets and liabilities are recorded within other assets and other liabilities, respectively, on the consolidated balance sheets, with changes in fair values during the period recorded within other service charges and fees on the consolidated statements of income.
	The following table presents a summary of the notional amounts and fair values of derivative financial instruments:


		March 31, 2015						December 31, 2014
		Notional			Asset			Notional		Asset
		Amount			(Liability)			Amount		(Liability)
					Fair Value					Fair Value
		(in thousands)
	Interest Rate Locks with Customers
	Positive fair values	$	151,389		$	2,509		$	89,655	$	1,391

	Negative fair values	187			(2		)	301		(6		)

	Net interest rate locks with customers				2,507					1,385

	Forward Commitments
	Negative fair values	144,370			(610		)	93,802		(1,164		)

	Interest Rate Swaps with Customers
	Positive fair values	535,786			29,035			468,080		19,716

	Negative fair values	8,000			(113		)	25,418		(198		)

	Net interest rate swaps with customers				28,922					19,518

	Interest Rate Swaps with Dealer Counterparties
	Positive fair values	8,000			113			25,418		198

	Negative fair values	535,786			(29,035		)	468,080		(19,716		)

	Net interest rate swaps with dealer counterparties				(28,922		)			(19,518		)
	Foreign Exchange Contracts with Customers
	Positive fair values	12,642			1,411			11,616		810

	Negative fair values	7,033			(475		)	5,250		(441		)

	Net foreign exchange contracts with customers				936					369

	Foreign Exchange Contracts with Correspondent Banks
	Positive fair values	8,053			952			5,287		446

	Negative fair values	14,825			(1,706		)	13,572		(876		)

	Net foreign exchange contracts with correspondent banks				(754		)			(430		)
	Net derivative fair value asset				$	2,079				$	160


	The following table presents a summary of the fair value gains and losses on derivative financial instruments:


		Three months ended March 31
		2015			2014
		(in thousands)
	Interest rate locks with customers	$	1,122		$	389

Forward commitments	554			(1,498		)

Interest rate swaps with customers	9,404			4,205

Interest rate swaps with dealer counterparties	(9,404		)	(4,205		)
Foreign exchange contracts with customers	567			192

Foreign exchange contracts with correspondent banks	(324		)	(268		)
Net fair value gains (losses) on derivative financial instruments	$	1,919		$	(1,185	)

Fair_Value_Option

Fair Value Option	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value Option	Fair Value Option
	U.S. GAAP permits entities to measure many financial instruments and certain other items at fair value and requires certain disclosures for amounts for which the fair value option is applied. The Corporation has elected to measure mortgage loans held for sale at fair value to more accurately reflect the financial results of its mortgage banking activities in its consolidated financial statements. Derivative financial instruments related to these activities are also recorded at fair value, as noted within Note 9, "Derivative Financial Instruments." The Corporation determines fair value for its mortgage loans held for sale based on the price that secondary market investors would pay for loans with similar characteristics, including interest rate and term, as of the date fair value is measured. Changes in fair values during the period are recorded as components of mortgage banking income on the consolidated statements of income. Interest income earned on mortgage loans held for sale is classified within interest income on the consolidated statements of income.
	The following table presents a summary of the Corporation’s mortgage loans held for sale:


		March 31,		December 31,
		2015		2014
		(in thousands)
	Cost	$	33,421	$	17,080

	Fair value	34,124		17,522

	During the three months ended March 31, 2015 and 2014, the Corporation recorded gains related to changes in fair values of mortgage loans held for sale of $261,000 and $297,000, respectively.

Balance_Sheet_Offsetting

Balance Sheet Offsetting	3 Months Ended
	Mar. 31, 2015
Offsetting [Abstract]
Balance Sheet Offsetting	Balance Sheet Offsetting
	Certain financial assets and liabilities may be eligible for offset on the consolidated balance sheets as they are subject to master netting arrangements or similar agreements. The Corporation elects to not offset assets and liabilities subject to such arrangements on the consolidated financial statements.
	The Corporation is a party to interest rate swap transactions with financial institution counterparties and customers, disclosed in detail within Note 9, "Derivative Financial Instruments." Under these agreements, the Corporation has the right to net settle multiple contracts with the same counterparty in the event of default on, or termination of, any one contract. Cash collateral is posted by the party with a net liability position in accordance with contract thresholds and can be used to settle the fair value of the interest rate swap agreements in the event of default.
	The Corporation is also a party to foreign currency exchange contracts with financial institution counterparties, under which the Corporation has the right to net settle multiple contracts with the same counterparty in the event of default on, or termination of, any one contract. As with interest rate swap contracts, cash collateral is posted by the party with a net liability position in accordance with contract thresholds and can be used to settle the fair value of the foreign currency exchange contracts in the event of default. For additional details, see Note 9, "Derivative Financial Instruments."
	The Corporation also enters into agreements with customers in which it sells securities subject to an obligation to repurchase the same or similar securities, referred to as repurchase agreements. Under these agreements, the Corporation may transfer legal control over the assets but still maintain effective control through agreements that both entitle and obligate the Corporation to repurchase the assets. Therefore, repurchase agreements are reported as secured borrowings, classified within short-term borrowings on the consolidated balance sheets, while the securities underlying the repurchase agreements remain classified with investment securities on the consolidated balance sheets. The Corporation has no intention of setting off these amounts, therefore, these repurchase agreements are not eligible for offset.












	The following table presents the Corporation's financial instruments that are eligible for offset, and the effects of offsetting, on the consolidated balance sheets:


		Gross Amounts		Gross Amounts Not Offset
		Recognized		on the Consolidated
		on the		Balance Sheets
		Consolidated		Financial			Cash			Net
		Balance Sheets		Instruments (1)			Collateral (2)			Amount
		(in thousands)
	March 31, 2015
	Interest rate swap derivative assets	$	29,148	$	(113	)	$	—		$	29,035

	Foreign exchange derivative assets with correspondent banks	952		(952		)	—			—

	Total	$	30,100	$	(1,065	)	$	—		$	29,035


	Interest rate swap derivative liabilities	$	29,148	$	(113	)	$	(28,070	)	$	965

	Foreign exchange derivative liabilities with correspondent banks	1,706		(952		)	(940		)	(186		)

	Total	$	30,854	$	(1,065	)	$	(29,010	)	$	779


	31-Dec-14
	Interest rate swap derivative assets	$	19,914	$	(206	)	$	—		$	19,708

	Foreign exchange derivative assets with correspondent banks	446		(446		)	—			—

	Total	$	20,360	$	(652	)	$	—		$	19,708


	Interest rate swap derivative liabilities	$	19,914	$	(206	)	$	(19,210	)	$	498

	Foreign exchange derivative liabilities with correspondent banks	876		(446		)	(310		)	120

	Total	$	20,790	$	(652	)	$	(19,520	)	$	618



	-1	For interest rate swap and foreign exchange derivative assets, amounts represent any derivative liability fair values that could be offset in the event of counterparty or customer default. For interest rate swap and foreign exchange derivative liabilities, amounts represent any derivative asset fair values that could be offset in the event of counterparty or customer default.

	-2	Amounts represent cash collateral posted on interest rate swap transactions with financial institution counterparties. Interest rate swaps with customers are collateralized by the underlying loans to those borrowers.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies
	Commitments
	The Corporation is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers.
	Those financial instruments include commitments to extend credit and letters of credit, which involve, to varying degrees, elements of credit risk and interest rate risk in excess of the amounts recognized on the Corporation’s consolidated balance sheets. Exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit and letters of credit is represented by the outstanding amount of those instruments.
	The outstanding amounts of commitments to extend credit and letters of credit were as follows:


		March 31,		December 31, 2014
		2015
		(in thousands)
	Commitments to extend credit	$	4,575,869	$	4,389,064

	Standby letters of credit	379,947		382,465

	Commercial letters of credit	36,049		32,304

	The Corporation records a reserve for unfunded lending commitments, which represents management’s estimate of losses associated with unused commitments to extend credit. See Note 5, "Loans and Allowance for Credit Losses," for additional details.
	Residential Lending
	Residential mortgages originated and sold by the Corporation consist primarily of conforming, prime loans sold to government sponsored agencies, such as the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Mortgage Corporation ("Freddie Mac"). The Corporation also sells a portion of prime loans to non-government sponsored agency investors.

	The Corporation provides customary representations and warranties to investors that specify, among other things, that the loans have been underwritten to the standards established by the investor. The Corporation may be required to repurchase a loan, or reimburse the investor for a credit loss incurred on a loan, if it is determined that the representations and warranties have not been met. Such repurchases or reimbursements generally result from an underwriting or documentation deficiency. As of March 31, 2015 and December 31, 2014, total outstanding repurchase requests totaled $803,000 and $917,000, respectively.

	From 2000 to 2011, the Corporation sold loans to the Federal Home Loan Bank of Pittsburgh under its Mortgage Partnership Finance Program ("MPF Program"). No loans were sold under this program during the three months ended March 31, 2015 or 2014. The Corporation provided a "credit enhancement" for residential mortgage loans sold under the MPF Program whereby it would assume credit losses in excess of a defined "First Loss Account," or "FLA" balance, up to specified amounts. The FLA is funded by the Federal Home Loan Bank of Pittsburgh based on a percentage of the outstanding principal balance of loans sold. As of March 31, 2015, the unpaid principal balance of loans sold under the MPF Program was approximately $148 million. As of March 31, 2015 and December 31, 2014, the reserve for estimated credit losses related to loans sold under the MPF Program was $2.2 million and $2.3 million, respectively. Required reserves are calculated based on delinquency status and estimated loss rates established through the Corporation's existing allowance for credit losses methodology for residential mortgage loans.

	As of March 31, 2015 and December 31, 2014, the total reserve for losses on residential mortgage loans sold was $3.0 million and $3.2 million, respectively, including both reserves for credit losses under the MPF Program and reserves for representation and warranty exposures. Management believes that the reserves recorded as of March 31, 2015 are adequate. However, declines in collateral values, the identification of additional loans to be repurchased, or a deterioration in the credit quality of loans sold under the MPF Program could necessitate additional reserves, established through charges to earnings, in the future.
	Regulatory Matters

	As disclosed by the Corporation in Part II, Item 9B of its Annual Report on Form 10-K for the year ended December 31, 2014 filed with the SEC on February 25, 2015, in February 2015, Fulton Bank of New Jersey ("FBNJ"), a wholly owned banking subsidiary of the Corporation, entered into a Stipulation and Consent to the Issuance of a Consent Order with the FDIC consenting to the issuance by the FDIC of a Consent Order (the "FDIC Consent Order"). In addition, in February 2015, FBNJ entered into a Consent Order with the Commissioner of Banking and Insurance for the State of New Jersey (the "New Jersey Consent Order") and, together with the FDIC Consent Order, the "Consent Orders"). The Consent Orders impose substantially identical requirements and relate to identified deficiencies in a centralized Bank Secrecy Act and anti-money laundering compliance program (the "BSA/AML Compliance Program"), which was designed to comply with the requirements of the Bank Secrecy Act, the USA Patriot Act of 2001 and related anti-money laundering regulations (collectively, the "BSA/AML Requirements"). The Consent Orders generally require, among other things, that FBNJ review, assess and take actions to strengthen and enhance the BSA/AML Compliance Program, including increasing oversight of the BSA/AML Compliance Program by the Board of Directors of FBNJ; designating a qualified Bank Secrecy Act officer that is acceptable to the FDIC and the Commissioner of Banking and Insurance for the State of New Jersey, that reports monthly to the Board of Directors of FBNJ and is provided with sufficient authority and resources to implement and enforce the BSA/AML Compliance Program; enhancing the periodic risk assessment process relating to the BSA/AML Requirements; revising internal controls designed to ensure compliance with the BSA/AML Requirements, including enhancing customer due diligence procedures and establishing enhanced due diligence procedures for higher-risk customers; and reviewing and enhancing procedures for monitoring for, identifying, investigating and reporting suspicious activity, or known or suspected violations of law in accordance with the BSA/AML Requirements.

	The Corporation and each of its other banking subsidiaries are subject to similar regulatory enforcement orders issued during 2014 by their respective bank regulatory agencies relating to identified deficiencies in the BSA/AML Compliance Program. Information relating to the regulatory enforcement orders issued during 2014 was disclosed by the Corporation in Current Reports on Form 8-K filed with the SEC on July 18, September 9, and December 29, 2014.

	Other Contingencies
	The Corporation and its subsidiaries are involved in various legal proceedings in the ordinary course of business of the Corporation. The Corporation periodically evaluates the possible impact of pending litigation matters based on, among other factors, the advice of counsel, available insurance coverage and recorded liabilities and reserves for probable legal liabilities and costs. In addition, from time to time, the Corporation is the subject of investigations or other forms of regulatory or governmental inquiry covering a range of possible issues and, in some cases, these may be part of similar reviews of the specified activities of other industry participants. These inquiries could lead to administrative, civil or criminal proceedings, and could possibly result in fines, penalties, restitution or the need to alter the Corporation’s business practices, and cause the Corporation to incur additional costs. The Corporation’s practice is to cooperate fully with regulatory and governmental investigations.

	As of the date of this report, the Corporation believes that any liabilities, individually or in the aggregate, which may result from the final outcomes of pending proceedings will not have a material adverse effect on the financial condition, the operating results and/or the liquidity of the Corporation. However, legal proceedings are often unpredictable, and the actual results of such proceedings cannot be determined with certainty.

Fair_Value_Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements
	FASB ASC Topic 820 establishes a fair value hierarchy for the inputs to valuation techniques used to measure assets and liabilities at fair value using the following three categories (from highest to lowest priority):

	•	Level 1 – Inputs that represent quoted prices for identical instruments in active markets.

	•	Level 2 – Inputs that represent quoted prices for similar instruments in active markets, or quoted prices for identical instruments in non-active markets. Also includes valuation techniques whose inputs are derived principally from observable market data other than quoted prices, such as interest rates or other market-corroborated means.

	•	Level 3 – Inputs that are largely unobservable, as little or no market data exists for the instrument being valued.
	The Corporation has categorized all assets and liabilities measured at fair value on both a recurring and nonrecurring basis into the above three levels.
	The following tables present summaries of the Corporation’s assets and liabilities measured at fair value on a recurring basis and reported on the consolidated balance sheets:


		March 31, 2015
		Level 1			Level 2			Level 3			Total
		(in thousands)
	Mortgage loans held for sale	$	—		$	34,124		$	—		$	34,124

	Available for sale investment securities:
	Equity securities	40,608			—			—			40,608

	U.S. Government sponsored agency securities	—			203			—			203

	State and municipal securities	—			224,342			—			224,342

	Corporate debt securities	—			92,778			4,904			97,682

	Collateralized mortgage obligations	—			867,876			—			867,876

	Mortgage-backed securities	—			930,159			—			930,159

	Auction rate securities	—			—			98,932			98,932

	Total available for sale investments	40,608			2,115,358			103,836			2,259,802

	Other assets	19,198			31,657			—			50,855

	Total assets	$	59,806		$	2,181,139		$	103,836		$	2,344,781

	Other liabilities	$	19,009		$	29,760		$	—		$	48,769



		December 31, 2014
		Level 1			Level 2			Level 3			Total
		(in thousands)
	Mortgage loans held for sale	$	—		$	17,522		$	—		$	17,522

	Available for sale investment securities:
	Equity securities	47,623			—			—			47,623

	U.S. Government securities	—			200			—			200

	U.S. Government sponsored agency securities	—			214			—			214

	State and municipal securities	—			245,215			—			245,215

	Corporate debt securities	—			90,126			7,908			98,034

	Collateralized mortgage obligations	—			902,313			—			902,313

	Mortgage-backed securities	—			928,831			—			928,831

	Auction rate securities	—			—			100,941			100,941

Total available for sale investments	47,623			2,166,899			108,849			2,323,371

Other assets	17,682			21,305			—			38,987

Total assets	$	65,305		$	2,205,726		$	108,849		$	2,379,880

Other liabilities	$	17,737		$	21,084		$	—		$	38,821

The valuation techniques used to measure fair value for the items in the preceding tables are as follows:

•	Mortgage loans held for sale – This category consists of mortgage loans held for sale that the Corporation has elected to measure at fair value. Fair values as of March 31, 2015 and December 31, 2014 were measured based on the price that secondary market investors were offering for loans with similar characteristics. See Note 10, "Fair Value Option" for details related to the Corporation’s election to measure assets and liabilities at fair value.

•	Available for sale investment securities – Included within this asset category are both equity and debt securities. Level 2 available for sale debt securities are valued by a third-party pricing service commonly used in the banking industry. The pricing service uses pricing models that vary based on asset class and incorporate available market information, including quoted prices of investment securities with similar characteristics. Because many fixed income securities do not trade on a daily basis, pricing models use available information, as applicable, through processes such as benchmark yield curves, benchmarking of like securities, sector groupings, and matrix pricing.
Standard market inputs include: benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers and reference data, including market research publications. For certain security types, additional inputs may be used, or some of the standard market inputs may not be applicable.

Management tests the values provided by the pricing service by obtaining securities prices from an alternative third-party source and comparing the results. This test is done for approximately 80% of the securities valued by the pricing service. Generally, differences by security in excess of 5% are researched to reconcile the difference.

•	Equity securities – Equity securities consist of common stocks of financial institutions ($34.7 million at March 31, 2015 and $41.8 million at December 31, 2014) and other equity investments ($5.9 million at March 31, 2015 and $5.8 million at December 31, 2014). These Level 1 investments are measured at fair value based on quoted prices for identical securities in active markets.

•	U.S. Government securities/U.S. Government sponsored agency securities/State and municipal securities/Collateralized mortgage obligations/Mortgage-backed securities – These debt securities are classified as Level 2 investments. Fair values are determined by a third-party pricing service, as detailed above.

•	Corporate debt securities – This category consists of subordinated debt issued by financial institutions ($50.2 million at March 31, 2015 and $50.0 million at December 31, 2014), single-issuer trust preferred securities issued by financial institutions ($42.9 million at March 31, 2015 and $42.0 million at December 31, 2014), pooled trust preferred securities issued by financial institutions ($1.1 million at March 31, 2015 and $4.1 million at December 31, 2014) and other corporate debt issued by non-financial institutions ($3.6 million at March 31, 2015 and $1.9 million at December 31, 2014).
Level 2 investments include the Corporation’s holdings of subordinated debt, other corporate debt issued by non-financial institutions and $39.0 million and $38.2 million of single-issuer trust preferred securities held at March 31, 2015 and December 31, 2014, respectively. The fair values for these corporate debt securities are determined by a third-party pricing service, as detailed above.
Level 3 investments include the Corporation’s investments in pooled trust preferred securities and certain single-issuer trust preferred securities ($3.8 million at March 31, 2015 and December 31, 2014). The fair values of these securities were determined based on quotes provided by third-party brokers who determined fair values based predominantly on internal valuation models which were not indicative prices or binding offers. The Corporation’s third-party pricing service cannot derive fair values for these securities primarily due to inactive markets for similar investments. Level 3 values are tested by management primarily through trend analysis, by comparing current values to those reported at the end of the preceding calendar quarter, and determining if they are reasonable based on price and spread movements for this asset class.

•	Auction rate securities – Due to their illiquidity, ARCs are classified as Level 3 investments and are valued through the use of an expected cash flows model prepared by a third-party valuation expert. The assumptions used in preparing the expected cash flows model include estimates for coupon rates, time to maturity and market rates of return. The most significant unobservable input to the expected cash flows model is an assumed return to market liquidity sometime within the next five years. If the assumed return to market liquidity was lengthened beyond the next five years, this would result in a decrease in the fair value of these ARCs. The Corporation believes that the trusts underlying the ARCs will self-liquidate as student loans are repaid. Level 3 values are tested by management through the performance of a trend analysis of the market price and discount rate. Changes in the price and discount rates are compared to changes in market data, including bond ratings, parity ratios, balances and delinquency levels.
Other assets – Included within this category are the following:

•	Level 1 assets include mutual funds that are held in trust for employee deferred compensation plans ($16.8 million at March 31, 2015 and $16.4 million at December 31, 2014) and the fair value of foreign currency exchange contracts ($2.4 million at March 31, 2015 and $1.3 million at December 31, 2014). The mutual funds and foreign exchange prices used to measure these items at fair value are based on quoted prices for identical instruments in active markets.

•	Level 2 assets include the fair value of mortgage banking derivatives in the form of interest rate locks ($2.5 million at March 31, 2015 and $1.4 million at December 31, 2014) and the fair value of interest rate swaps ($29.1 million at March 31, 2015 and $19.9 million at December 31, 2014). The fair values of the Corporation’s interest rate locks and interest rate swaps represent the amounts that would be required to settle the derivative financial instruments at the balance sheet date. See Note 9, "Derivative Financial Instruments," for additional information.

•	Other liabilities – Included within this category are the following:

•	Level 1 liabilities include employee deferred compensation liabilities which represent amounts due to employees under deferred compensation plans ($16.8 million at March 31, 2015 and $16.4 million at December 31, 2014) and the fair value of foreign currency exchange contracts ($2.2 million at March 31, 2015 and $1.3 million at December 31, 2014). The fair value of these liabilities are determined in the same manner as the related assets, as described under the heading "Other assets" above.

•	Level 2 liabilities include the fair value of mortgage banking derivatives in the form of interest rate locks and forward commitments with secondary market investors ($612,000 at March 31, 2015 and $1.2 million at December 31, 2014) and the fair value of interest rate swaps ($29.1 million at March 31, 2015 and $19.9 million at December 31, 2014). The fair values of these liabilities are determined in the same manner as the related assets, as described under the heading "Other assets" above.





The following table presents the changes in the Corporation’s available for sale investment securities measured at fair value on a recurring basis using unobservable inputs (Level 3):


	Three months ended March 31, 2015
	Pooled Trust			Single-issuer			ARCs
	Preferred			Trust Preferred
	Securities			Securities
	(in thousands)
Balance at December 31, 2014	$	4,088		$	3,820		$	100,941

Sales	(3,079		)	—			—

Unrealized adjustment to fair value (1)	190			(2		)	332

Settlements - calls	(117		)	—			(2,446		)

Discount accretion (2)	2			2			105

Balance at March 31, 2015	$	1,084		$	3,820		$	98,932


	Three months ended March 31, 2014
Balance at December 31, 2013	$	5,306		$	3,781		$	159,274

Sales	—			—			(11,912		)

Unrealized adjustment to fair value (1)	521			38			124

Settlements - calls	(172		)	—			—

Discount accretion (2)	4			1			227

Balance at March 31, 2014	$	5,659		$	3,820		$	147,713



-1	Pooled trust preferred securities, single-issuer trust preferred securities and ARCs are classified as available for sale investment securities; as such, the unrealized adjustment to fair value was recorded as an unrealized holding gain (loss) and included as a component of available for sale investment securities on the consolidated balance sheets.

-2	Included as a component of net interest income on the consolidated statements of income.
Certain financial assets are not measured at fair value on an ongoing basis, but are subject to fair value measurement in certain circumstances, such as upon their acquisition or when there is evidence of impairment. The following table presents the Corporation’s financial assets measured at fair value on a nonrecurring basis and reported on the Corporation’s consolidated balance sheets:


	March 31, 2015
	Level 1			Level 2			Level 3			Total
	(in thousands)
Net loans	$	—		$	—		$	148,698		$	148,698

Other financial assets	—			—			56,054			56,054

Total assets	$	—		$	—		$	204,752		$	204,752



	December 31, 2014
	Level 1			Level 2			Level 3			Total
	(in thousands)
Net loans	$	—		$	—		$	127,834		$	127,834

Other financial assets	—			—			54,170			54,170

Total assets	$	—		$	—		$	182,004		$	182,004

The valuation techniques used to measure fair value for the items in the table above are as follows:

•	Net loans – This category consists of loans that were evaluated for impairment under FASB ASC Section 310-10-35 and have been classified as Level 3 assets. The amount shown is the balance of impaired loans, net of the related allowance for loan losses. See Note 5, "Loans and Allowance for Credit Losses," for additional details.

•	Other financial assets – This category includes OREO ($14.3 million at March 31, 2015 and $12.0 million at December 31, 2014) and MSRs ($41.8 million at March 31, 2015 and $42.1 million at December 31, 2014), both classified as Level 3 assets.
Fair values for OREO were based on estimated selling prices less estimated selling costs for similar assets in active markets.
MSRs are initially recorded at fair value upon the sale of residential mortgage loans to secondary market investors. MSRs are amortized as a reduction to servicing income over the estimated lives of the underlying loans. MSRs are stratified and evaluated for impairment by comparing each stratum's carrying amount to its estimated fair value. Fair values are determined at the end of each quarter through a discounted cash flows valuation performed by a third-party valuation expert. Significant inputs to the valuation included expected net servicing income, the discount rate and the expected life of the underlying loans. Expected life is based on the contractual terms of the loans, as adjusted for prepayment projections. The weighted average annual constant prepayment rate and the weighted average discount rate used in the March 31, 2015 valuation were 12.6% and 9.6%, respectively. Management tests the reasonableness of the significant inputs to the third-party valuation in comparison to market data.
As required by FASB ASC Section 825-10-50, the following table details the book values and estimated fair values of the Corporation’s financial instruments as of March 31, 2015 and December 31, 2014. In addition, a general description of the methods and assumptions used to estimate such fair values is also provided.


	March 31, 2015						December 31, 2014
	Book Value			Estimated			Book Value			Estimated
				Fair Value						Fair Value
	(in thousands)
FINANCIAL ASSETS
Cash and due from banks	$	91,870		$	91,870		$	105,702		$	105,702

Interest-bearing deposits with other banks	637,973			637,973			358,130			358,130

Federal Reserve Bank and Federal Home Loan Bank stock	65,694			65,694			64,953			64,953

Loans held for sale (1)	34,124			34,124			17,522			17,522

Available for sale investment securities (1)	2,259,802			2,259,802			2,323,371			2,323,371

Loans, net of unearned income (1)	13,115,505			13,078,115			13,111,716			13,030,543

Accrued interest receivable	42,216			42,216			41,818			41,818

Other financial assets (1)	178,496			178,496			169,764			169,764

FINANCIAL LIABILITIES
Demand and savings deposits	$	10,467,077		$	10,467,077		$	10,296,055		$	10,296,055

Time deposits	3,047,420			3,058,030			3,071,451			3,069,883

Short-term borrowings	410,105			410,105			329,719			329,719

Accrued interest payable	18,357			18,357			18,045			18,045

Other financial liabilities (1)	193,924			193,924			172,786			172,786

Federal Home Loan Bank advances and long-term debt	1,094,517			1,104,738			1,139,413			1,142,980



-1	These financial instruments, or certain financial instruments within these categories, are measured at fair value on the Corporation’s consolidated balance sheets. Descriptions of the fair value determinations for these financial instruments are disclosed above.
Fair values of financial instruments are significantly affected by the assumptions used, principally the timing of future cash flows and discount rates. Because assumptions are inherently subjective in nature, the estimated fair values cannot be substantiated by comparison to independent market quotes and, in many cases, the estimated fair values could not necessarily be realized in an immediate sale or settlement of the instrument. The aggregate fair value amounts presented do not necessarily represent management’s estimate of the underlying value of the Corporation.
For short-term financial instruments, defined as those with remaining maturities of 90 days or less, and excluding those recorded at fair value on the Corporation’s consolidated balance sheets, book value was considered to be a reasonable estimate of fair value.

The following instruments are predominantly short-term:


Assets		Liabilities
Cash and due from banks		Demand and savings deposits
Interest bearing deposits with other banks		Short-term borrowings
Accrued interest receivable		Accrued interest payable

Federal Reserve Bank and Federal Home Loan Bank stock represent restricted investments and are carried at cost on the consolidated balance sheets. Each of the Corporation’s subsidiary banks is a member of the Federal Home Loan Bank for the region encompassing the headquarters of the subsidiary bank. Memberships are maintained with the Atlanta, New York and Pittsburgh regional Federal Home Loan Banks (collectively referred to as the "FHLB").
Fair values for loans and time deposits were estimated by discounting future cash flows using the current rates at which similar loans would be made to borrowers and similar deposits would be issued to customers for the same remaining maturities. Fair values estimated in this manner do not fully incorporate an exit price approach to fair value, as defined in FASB ASC Topic 820.
The fair values of FHLB advances and long-term debt were estimated by discounting the remaining contractual cash flows using a rate at which the Corporation could issue debt with similar remaining maturities as of the balance sheet date. These borrowings would be categorized within Level 2 liabilities under FASB ASC Topic 820.

Subsequent_Events

Subsequent Events	3 Months Ended
Subsequent Events	Mar. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events

	On April 1, 2015, $100.0 million of the Corporation's outstanding subordinated debt originally issued in March of 2005 with an effective interest rate of 5.49%, matured and was fully repaid with available liquidity.

	In November 2014, the Corporation entered into an accelerated share repurchase agreement ("ASR") with a third party to repurchase $100.0 million of shares of its common stock. Under the terms of the ASR, the Corporation paid $100.0 million to the third party in November 2014 and received an initial delivery of 6.5 million shares, representing 80% of the shares expected to be delivered under the ASR, based on the closing price for the Corporation’s shares on November 13, 2014. In April 2015, the third party delivered an additional 1.8 million shares of common stock pursuant to the terms of the ASR, thereby completing the $100.0 million ASR. The Corporation repurchased a total of 8.3 million shares of common stock under the ASR at an average price of $12.05 per share.

	In April 2015, the Corporation announced that its board of directors had approved a share repurchase program pursuant to which the Corporation is authorized to repurchase up to $50.0 million of its outstanding shares of common stock, or approximately 2.3% of its outstanding shares, through December 31, 2015. Repurchased shares may be added to treasury stock, at cost, and will be used for general corporate purposes. As permitted by securities laws and other legal requirements and subject to market conditions and other factors, purchases may be made from time to time in open market or privately negotiated transactions, including without limitation, through accelerated share repurchase transactions. The share repurchase program may be discontinued at any time.

Basis_of_Presentation_Basis_of

Basis of Presentation Basis of Presentation (Policies)	3 Months Ended
Basis of Presentation Basis of Presentation (Policies)	Mar. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
New Accounting Pronouncements, Policy	Recent Accounting Standards

	Effective January 1, 2015, the Corporation adopted the Financial Accounting Standards Board's ("FASB") Accounting Standards Codification ("ASC") Update 2014-01, "Accounting for Investments in Qualified Affordable Housing Projects." ASC Update 2014-01 provides guidance on accounting for investments made by a reporting entity in flow-through limited liability entities that manage or invest in affordable housing projects that qualify for the low income housing tax credit. The Corporation has made certain investments in partnerships that generate tax credits under various federal programs which promote investment in low and moderate income housing and local economic development. The net income tax benefit associated with these investments, which consists of the amortization of the investments net of tax benefits, and the income tax credits earned on the investments recorded in income taxes on the consolidated income statements was $2.5 million for the three months ended March 31, 2015 and 2014. As of March 31, 2015 and December 31, 2014, the Corporation’s tax credit investments, included in other assets on the consolidated balance sheets, totaled $164.9 million and $155.6 million, respectively. The adoption of this ASC update did not have a material impact on the Corporation's consolidated financial statements for the three months ended March 31, 2015 or 2014.

	In February 2015, the FASB issued ASC Update 2015-02, "Consolidation: Amendments to the Consolidation Analysis." ASC Update 2015-02 changes the way reporting enterprises evaluate whether: (a) they should consolidate limited partnerships and similar entities, (b) fees paid to a decision maker or service provider are variable interests in a variable interest entity ("VIE"), and (c) variable interests in a VIE held by related parties of the reporting enterprise require the reporting enterprise to consolidate the VIE. ASC Update 2015-02 is effective for public business entities' annual and interim reporting periods beginning after December 15, 2015, with earlier adoption permitted. The Corporation intends to adopt this standards update effective with its March 31, 2016 quarterly report on Form 10-Q, and does not expect the adoption of ASC Update 2015-02 to have a material impact on its consolidated financial statements.

	In April 2015, the FASB issued ASC Update 2015-03, "Interest - Imputation of Interest." ASC Update 2015-03 simplifies the presentation of debt issuances costs. Debt issuance costs related to a recognized debt liability will be presented on the balance sheet as a direct deduction from the debt liability, similar to the presentation of debt discounts. Under current U.S. GAAP, debt issuance costs are reported on the balance sheet as assets. The costs will continue to be amortized to interest expense using the effective interest method. ASC Update 2015-03 is effective for public business entities' annual and interim reporting periods beginning after December 15, 2015, with earlier adoption permitted. The Corporation intends to adopt this standards update effective with its March 31, 2016 quarterly report on Form 10-Q and does not expect the adoption of ASC Update 2015-03 to have a material impact on its consolidated financial statements.

	In April 2015, the FASB issued ASC Update 2015-05, "Customer's Accounting for Fees Paid in a Cloud Computing Arrangement." ASC Update 2015-05 provides explicit guidance to determine when a customer's fees paid in a cloud computing arrangement is for the acquisition of software licenses, services, or both. ASC Update 2015-05 is effective for public business entities' annual and interim reporting periods beginning after December 15, 2015, with earlier adoption permitted. The Corporation intends to adopt this standards update effective with its March 31, 2016 quarterly report on Form 10-Q and does not expect the adoption of ASC Update 2015-05 to have a material impact on its consolidated financial statements.

Net_Income_Per_Share_Tables

Net Income Per Share (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Reconciliation of Weighted Average Common Shares Outstanding	A reconciliation of weighted average shares outstanding used to calculate basic net income per share and diluted net income per share follows:


		Three months ended March 31
		2015	2014
		(in thousands)
	Weighted average shares outstanding (basic)	178,471	189,467

	Impact of common stock equivalents	986	1,022

	Weighted average shares outstanding (diluted)	179,457	190,489

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Changes in other comprehensive income [Table Text Block]	The following table presents changes in other comprehensive income:


		Before-Tax Amount			Tax Effect			Net of Tax Amount
		(in thousands)
	Three months ended March 31, 2015
	Unrealized gain on securities	$	15,371		$	(5,379	)	$	9,992

	Reclassification adjustment for securities gains included in net income (1)	(4,145		)	1,450			(2,695		)

	Non-credit related unrealized gains on other-than-temporarily impaired debt securities	192			(67		)	125

	Unrealized gain on derivative financial instruments	52			(18		)	34

	Amortization of net unrecognized pension and postretirement items (2)	717			(251		)	466

	Total Other Comprehensive Income	$	12,187		$	(4,265	)	$	7,922

	Three months ended March 31, 2014
	Unrealized gain on securities	$	21,435		$	(7,502	)	$	13,933

	Reclassification adjustment for postretirement gains included in net income (2)	(1,452		)	508			(944		)

	Non-credit related unrealized gains on other-than-temporarily impaired debt securities	291			(102		)	189

	Unrealized gain on derivative financial instruments	52			(18		)	34

	Unrecognized pension and postretirement income	3,291			(1,147		)	2,144

	Amortization of net unrecognized pension and postretirement items (2)	149			(53		)	96

	Total Other Comprehensive Income	$	23,766		$	(8,314	)	$	15,452



	-1	Amounts reclassified out of accumulated other comprehensive income. Before-tax amounts included within "Investment securities gains, net" on the consolidated statements of income. See Note 4, "Investment Securities," for additional details.

	-2	Amounts reclassified out of accumulated other comprehensive income. Before-tax amounts included within "Salaries and employee benefits" on the consolidated statements of income. See Note 8, "Employee Benefit Plans," for additional details.
Changes in each component of accumulated other comprehensive income [Table Text Block]	The following table presents changes in each component of accumulated other comprehensive income, net of tax:


		Unrealized Gains (Losses) on Investment Securities Not Other-Than-Temporarily Impaired			Unrealized Non-Credit Gains (Losses) on Other-Than-Temporarily Impaired Debt Securities			Unrealized Effective Portions of Losses on Forward-Starting Interest Rate Swaps			Unrecognized Pension and Postretirement Plan Income (Costs)			Total
		(in thousands)
	Three months ended March 31, 2015
	Balance at December 31, 2014	$	5,980		$	1,349		$	(2,546	)	$	(22,505	)	$	(17,722	)

	Other comprehensive income before reclassifications	9,992			125			—			—			10,117

	Amounts reclassified from accumulated other comprehensive income (loss)	(1,661		)	(1,034		)	34			466			(2,195		)

	Balance at March 31, 2015	$	14,311		$	440		$	(2,512	)	$	(22,039	)	$	(9,800	)

	Three months ended March 31, 2014

	Balance at December 31, 2013	$	(27,510	)	$	1,652		$	(2,682	)	$	(8,801	)	$	(37,341	)

	Other comprehensive income before reclassifications	13,933			189			—			2,144			16,266

	Amounts reclassified from accumulated other comprehensive income (loss)	—			—			34			(848		)	(814		)

	Balance at March 31, 2014	$	(13,577	)	$	1,841		$	(2,648	)	$	(7,505	)	$	(21,889	)

Investment_Securities_Tables

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Schedule of Amortized Cost and Fair Values of Investment Securities	The following table presents the amortized cost and estimated fair values of investment securities, which were all classified as available for sale:


		Amortized			Gross			Gross			Estimated
		Cost			Unrealized			Unrealized			Fair
					Gains			Losses			Value
		(in thousands)
	31-Mar-15
	Equity securities	$	29,224		$	11,397		$	(13	)	$	40,608

	U.S. Government sponsored agency securities	198			5			—			203

	State and municipal securities	216,877			7,496			(31		)	224,342

	Corporate debt securities	99,120			3,929			(5,367		)	97,682

	Collateralized mortgage obligations	874,853			5,924			(12,901		)	867,876

	Mortgage-backed securities	910,418			20,859			(1,118		)	930,159

	Auction rate securities	106,410			—			(7,478		)	98,932

		$	2,237,100		$	49,610		$	(26,908	)	$	2,259,802



		Amortized			Gross			Gross			Estimated
		Cost			Unrealized			Unrealized			Fair
					Gains			Losses			Value
		(in thousands)
	31-Dec-14
	Equity securities	$	33,469		$	14,167		$	(13	)	$	47,623

	U.S. Government securities	200			—			—			200

	U.S. Government sponsored agency securities	209			5			—			214

	State and municipal securities	238,250			7,231			(266		)	245,215

	Corporate debt securities	99,016			5,126			(6,108		)	98,034

	Collateralized mortgage obligations	917,395			5,705			(20,787		)	902,313

	Mortgage-backed securities	914,797			16,978			(2,944		)	928,831

	Auction rate securities	108,751			—			(7,810		)	100,941

		$	2,312,087		$	49,212		$	(37,928	)	$	2,323,371

Schedule of Amortized Cost and Fair Values of Debt Securities by Contractual Maturities	The amortized cost and estimated fair values of debt securities as of March 31, 2015, by contractual maturity, are shown in the following table. Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.


			Amortized			Estimated
			Cost			Fair Value
		(in thousands)
	Due in one year or less		$	29,323		$	30,124

	Due from one year to five years		74,801			78,246

	Due from five years to ten years		140,219			144,978

	Due after ten years		178,262			167,811

			422,605			421,159

	Collateralized mortgage obligations		874,853			867,876

	Mortgage-backed securities		910,418			930,159

			$	2,207,876		$	2,219,194

Summary of Gains and Losses from Equity and Debt Securities, and Losses Recognized from Other-than-Temporary Impairment	The following table presents information related to the gross realized gains and losses on the sales of equity and debt securities:


		Gross			Gross			Net Gains (Losses)
		Realized			Realized
		Gains			Losses
	Three months ended March 31, 2015	(in thousands)
	Equity securities	$	1,970		$	—		$	1,970

	Debt securities	2,175			—			2,175

	Total	$	4,145		$	—		$	4,145

	Three months ended March 31, 2014
	Equity securities	$	1		$	—		$	1

	Debt securities	322			(323		)	(1		)

	Total	$	323		$	(323	)	$	—

Summary Of Other Than Temporary Impairment Charges Recorded In Statement Of Operations [Table Text Block]	The following table presents a summary of the cumulative credit related other-than-temporary impairment charges, recognized as components of earnings, for debt securities held by the Corporation at March 31, 2015 and 2014:


		Three months ended March 31
		2015			2014
		(in thousands)
	Balance of cumulative credit losses on debt securities, beginning of period	$	(16,242	)	$	(20,691	)
	Reductions for securities sold during the period	3,938			—

	Reductions for increases in cash flows expected to be collected that are recognized over the remaining life of the security	2			4

	Balance of cumulative credit losses on debt securities, end of period	$	(12,302	)	$	(20,687	)
Gross Unrealized Losses and Fair Values of Investments by Category and Length of Time in Continuous Unrealized Loss Position	The following table presents the gross unrealized losses and estimated fair values of investments, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at March 31, 2015:


		Less than 12 months						12 months or longer						Total
		Estimated			Unrealized			Estimated			Unrealized			Estimated		Unrealized
		Fair Value			Losses			Fair Value			Losses			Fair Value		Losses
		(in thousands)
	State and municipal securities	$	5,953		$	(31	)	$	—		$	—		$	5,953	$	(31	)

	Corporate debt securities	4,970			(4		)	34,600			(5,363		)	39,570		(5,367		)

	Collateralized mortgage obligations	34,287			(132		)	547,418			(12,769		)	581,705		(12,901		)

	Mortgage-backed securities	116,136			(327		)	72,224			(791		)	188,360		(1,118		)

	Auction rate securities	—			—			98,932			(7,478		)	98,932		(7,478		)

	Total debt securities	161,346			(494		)	753,174			(26,401		)	914,520		(26,895		)

	Equity securities	—			—			77			(13		)	77		(13		)

		$	161,346		$	(494	)	$	753,251		$	(26,414	)	$	914,597	$	(26,908	)

Summary of Amortized Cost and Fair Values of Corporate Debt Securities	The following table presents the amortized cost and estimated fair value of corporate debt securities:


		March 31, 2015						December 31, 2014
		Amortized			Estimated			Amortized			Estimated
		cost			fair value			cost			fair value
		(in thousands)
	Single-issuer trust preferred securities	$	47,590		$	42,863		$	47,569		$	42,016

	Subordinated debt	47,563			50,173			47,530			50,023

	Pooled trust preferred securities	405			1,084			2,010			4,088

	Corporate debt securities issued by financial institutions	95,558			94,120			97,109			96,127

	Other corporate debt securities	3,562			3,562			1,907			1,907

	Available for sale corporate debt securities	$	99,120		$	97,682		$	99,016		$	98,034

Loans_and_Allowance_for_Credit1

Loans and Allowance for Credit Losses (Tables)	3 Months Ended
	Mar. 31, 2015
Receivables [Abstract]
Summary of Gross Loans by Type	Loans, net of unearned income are summarized as follows:


		March 31,				31-Dec-14
		2015
		(in thousands)
	Real-estate - commercial mortgage	$	5,227,101			$	5,197,155

	Commercial - industrial, financial and agricultural	3,762,631				3,725,567

	Real-estate - home equity	1,701,623				1,736,688

	Real-estate - residential mortgage	1,364,788				1,377,068

	Real-estate - construction	677,806				690,601

	Consumer	257,301				265,431

	Leasing and other	135,552				127,562

	Overdrafts	1,721				4,021

	Loans, gross of unearned income	13,128,523				13,124,093

	Unearned income	(13,018		)		(12,377		)
	Loans, net of unearned income	$	13,115,505			$	13,111,716

Schedule of Allowance for Credit Losses	The following table presents the components of the allowance for credit losses:


		March 31,				December 31,
		2015				2014
		(in thousands)
	Allowance for loan losses	$	177,701			$	184,144

	Reserve for unfunded lending commitments	1,957				1,787

	Allowance for credit losses	$	179,658			$	185,931

Activity in the Allowance for Credit Losses	The following table presents the activity in the allowance for credit losses:


		Three months ended March 31
		2015				2014
		(in thousands)
	Balance at beginning of period	$	185,931			$	204,917

	Loans charged off	(5,764		)		(10,268		)
	Recoveries of loans previously charged off	3,191				1,857

	Net loans charged off	(2,573		)		(8,411		)
	Provision for credit losses	(3,700		)		2,500

	Balance at end of period	$	179,658			$	199,006


	The following table presents the activity in the allowance for loan losses by portfolio segment:


		Real Estate -				Commercial -				Real Estate -				Real Estate -				Real Estate -				Consumer				Leasing				Unallocated				Total
		Commercial				Industrial,				Home				Residential				Construction								and other
		Mortgage				Financial and				Equity				Mortgage												and
						Agricultural																				overdrafts
		(in thousands)
	Three months ended March 31, 2015
	Balance at December 31, 2014	$	53,493			$	51,378			$	28,271			$	29,072			$	9,756			$	3,015			$	1,799			$	7,360			$	184,144

	Loans charged off	(709		)		(1,863		)		(768		)		(1,281		)		—				(780		)		(363		)		—				(5,764		)

	Recoveries of loans previously charged off	436				786				251				159				1,147				241				171				—				3,191

	Net loans charged off	(273		)		(1,077		)		(517		)		(1,122		)		1,147				(539		)		(192		)		—				(2,573		)

	Provision for loan losses (1)	(360		)		6,849				(4,273		)		(4,715		)		(2,416		)		51				46				948				(3,870		)

	Balance at March 31, 2015	$	52,860			$	57,150			$	23,481			$	23,235			$	8,487			$	2,527			$	1,653			$	8,308			$	177,701

	Three months ended March 31, 2014
	Balance at December 31, 2013	$	55,659			$	50,330			$	28,222			$	33,082			$	12,649			$	3,260			$	3,370			$	16,208			$	202,780

	Loans charged off	(1,386		)		(5,125		)		(1,651		)		(846		)		(214		)		(751		)		(295		)		—				(10,268		)

	Recoveries of loans previously charged off	44				744				356				116				224				209				164				—				1,857

	Net loans charged off	(1,342		)		(4,381		)		(1,295		)		(730		)		10				(542		)		(131		)		—				(8,411		)

	Provision for loan losses (1)	(560		)		4,614				5,533				977				(2,817		)		606				(1,228		)		(4,405		)		2,720

	Balance at March 31, 2014	$	53,757			$	50,563			$	32,460			$	33,329			$	9,842			$	3,324			$	2,011			$	11,803			$	197,089



	-1	The provision for loan losses excluded a $170,000 increase and $220,000 decrease in the reserve for unfunded lending commitments for the three months ended March 31, 2015 and March 31, 2014, respectively. The total provision for credit losses, comprised of allocations for both funded and unfunded loans, was a negative $3.7 million for the three months ended March 31, 2015 and was $2.5 million for the three months ended March 31, 2014.
	The following table presents loans, net of unearned income and their related allowance for loan losses, by portfolio segment:


		Real Estate -				Commercial -				Real Estate -				Real Estate -				Real Estate -				Consumer				Leasing				Unallocated				Total
		Commercial				Industrial,				Home				Residential				Construction								and other				-1
		Mortgage				Financial and				Equity				Mortgage												and
						Agricultural																				overdrafts
		(in thousands)
	Allowance for loan losses at March 31, 2015:
	Measured for impairment under FASB ASC Subtopic 450-20	$	38,916			$	40,027			$	16,937			$	9,162			$	6,037			$	2,504			$	1,653			$	8,308			$	123,544

Evaluated for impairment under FASB ASC Section 310-10-35	13,944				17,123				6,544				14,073				2,450				23				—				N/A				54,157

	$	52,860			$	57,150			$	23,481			$	23,235			$	8,487			$	2,527			$	1,653			$	8,308			$	177,701


Loans, net of unearned income at March 31, 2015:
Measured for impairment under FASB ASC Subtopic 450-20	$	5,157,342			$	3,716,037			$	1,688,869			$	1,312,861			$	656,021			$	257,265			$	124,255			N/A				$	12,912,650

Evaluated for impairment under FASB ASC Section 310-10-35	69,759				46,594				12,754				51,927				21,785				36				—				N/A				202,855

	$	5,227,101			$	3,762,631			$	1,701,623			$	1,364,788			$	677,806			$	257,301			$	124,255			N/A				$	13,115,505


Allowance for loan losses at March 31, 2014:
Measured for impairment under FASB ASC Subtopic 450-20	$	37,363			$	36,859			$	22,969			$	11,618			$	7,256			$	3,309			$	2,011			$	11,803			$	133,188

Evaluated for impairment under FASB ASC Section 310-10-35	16,394				13,704				9,491				21,711				2,586				15				—				N/A				63,901

	$	53,757			$	50,563			$	32,460			$	33,329			$	9,842			$	3,324			$	2,011			$	11,803			$	197,089


Loans, net of unearned income at March 31, 2014:
Measured for impairment under FASB ASC Subtopic 450-20	$	5,075,556			$	3,528,857			$	1,726,342			$	1,279,783			$	555,852			$	270,004			$	96,009			N/A				$	12,532,403

Evaluated for impairment under FASB ASC Section 310-10-35	61,898				45,273				14,154				51,682				28,365				17				—				N/A				201,389

	$	5,137,454			$	3,574,130			$	1,740,496			$	1,331,465			$	584,217			$	270,021			$	96,009			N/A				$	12,733,792



-1	The unallocated allowance, which was approximately 5% and 6% of the total allowance for credit losses as of March 31, 2015 and March 31, 2014, respectively, was, in the opinion of management, reasonable and appropriate given that the estimates used in the allocation process are inherently imprecise.
N/A Not applicable
Total Impaired Loans by Class Segment	The following table presents total impaired loans by class segment:


		March 31, 2015												December 31, 2014
		Unpaid				Recorded				Related				Unpaid				Recorded				Related
		Principal				Investment				Allowance				Principal				Investment				Allowance
		Balance												Balance
		(in thousands)
	With no related allowance recorded:
	Real estate - commercial mortgage	$	35,586			$	30,462			$	—			$	25,802			$	23,236			$	—

	Commercial - secured	17,832				14,769				—				17,599				14,582				—

	Real estate - residential mortgage	4,858				4,858				—				4,873				4,873				—

	Construction - commercial residential	16,448				13,643				—				18,041				14,801				—

	Construction - commercial	829				694				—				1,707				1,581				—

		75,553				64,426								68,022				59,073

	With a related allowance recorded:
	Real estate - commercial mortgage	48,636				39,297				13,944				49,619				40,023				16,715

	Commercial - secured	35,825				30,565				16,315				24,824				19,335				12,165

	Commercial - unsecured	1,417				1,260				808				1,241				1,089				865

	Real estate - home equity	18,035				12,754				6,544				19,392				13,458				9,224

	Real estate - residential mortgage	56,684				47,069				14,073				56,607				46,478				18,592

	Construction - commercial residential	13,267				6,590				2,169				14,007				7,903				2,675

	Construction - commercial	867				577				178				1,501				1,023				459

	Construction - other	452				281				103				452				281				137

	Consumer - direct	17				17				11				19				19				17

	Consumer - indirect	41				19				12				20				19				18

		175,241				138,429				54,157				167,682				129,628				60,867

	Total	$	250,794			$	202,855			$	54,157			$	235,704			$	188,701			$	60,867

	As of March 31, 2015 and December 31, 2014, there were $64.4 million and $59.1 million, respectively, of impaired loans that did not have a related allowance for loan loss. The estimated fair values of the collateral securing these loans exceeded their carrying amount, or they were previously charged down to realizable collateral values. Accordingly, no specific valuation allowance was considered to be necessary.
	The following table presents average impaired loans by class segment:


		Three months ended March 31
		2015								2014
		Average				Interest				Average				Interest
		Recorded				Income				Recorded				Income
		Investment				Recognized (1)				Investment				Recognized (1)
		(in thousands)
	With no related allowance recorded:
	Real estate - commercial mortgage	$	26,849			$	91			$	23,993			$	86

	Commercial - secured	14,676				21				21,125				35

	Real estate - home equity	—				—				300				—

	Real estate - residential mortgage	4,866				28				159				1

Construction - commercial residential	14,222				55				17,223				60

Construction - commercial	1,138				—				1,969				—

	61,751				195				64,769				182

With a related allowance recorded:
Real estate - commercial mortgage	39,660				133				37,119				132

Commercial - secured	24,950				36				23,045				38

Commercial - unsecured	1,175				1				845				1

Real estate - home equity	13,106				31				14,096				20

Real estate - residential mortgage	46,774				273				51,231				294

Construction - commercial residential	7,247				28				9,771				35

Construction - commercial	800				—				193				—

Construction - other	281				—				546				—

Consumer - direct	18				—				13				—

Consumer - indirect	19				—				2				—

	134,030				502				136,861				520

Total	$	195,781			$	697			$	201,630			$	702



-1	All impaired loans, excluding accruing TDRs, were non-accrual loans. Interest income recognized for the three months ended March 31, 2015 and 2014 represents amounts earned on accruing TDRs.
Financing Receivable Credit Quality Indicators	The following table presents internal credit risk ratings for real estate - commercial mortgages, commercial - secured loans, commercial - unsecured loans, construction - commercial residential loans and construction - commercial loans:


		Pass								Special Mention								Substandard or Lower								Total
		March 31, 2015				December 31, 2014				March 31, 2015				December 31, 2014				March 31, 2015				December 31, 2014				March 31, 2015				December 31, 2014
		(dollars in thousands)
	Real estate - commercial mortgage	$	4,919,760			$	4,899,016			$	123,644			$	127,302			$	183,697			$	170,837			$	5,227,101			$	5,197,155

	Commercial - secured	3,344,506				3,333,486				151,724				120,584				112,156				110,544				3,608,386				3,564,614

	Commercial - unsecured	142,536				146,680				3,331				7,463				8,378				6,810				154,245				160,953

	Total commercial - industrial, financial and agricultural	3,487,042				3,480,166				155,055				128,047				120,534				117,354				3,762,631				3,725,567

	Construction - commercial residential	173,833				136,109				20,662				27,495				37,038				40,066				231,533				203,670

	Construction - commercial	378,131				409,631				11,802				12,202				3,475				5,586				393,408				427,419

	Total construction (excluding Construction - other)	551,964				545,740				32,464				39,697				40,513				45,652				624,941				631,089

		$	8,958,766			$	8,924,922			$	311,163			$	295,046			$	344,744			$	333,843			$	9,614,673			$	9,553,811

	% of Total	93.2		%		93.4		%		3.2		%		3.1		%		3.6		%		3.5		%		100		%		100		%

	The following is a summary of the Corporation's internal risk rating categories:

	•	Pass: These loans do not currently pose undue credit risk and can range from the highest to average quality, depending on the degree of potential risk.

	•	Special Mention: These loans constitute an undue and unwarranted credit risk, but not to a point of justifying a classification of substandard. Loans in this category are currently acceptable, but are nevertheless potentially weak.

	•	Substandard or Lower: These loans are inadequately protected by current sound worth and paying capacity of the borrower. There exists a well-defined weakness or weaknesses that jeopardize the normal repayment of the debt.

	The risk rating process allows management to identify riskier credits in a timely manner and to allocate resources to managing troubled accounts.The Corporation believes that internal risk ratings are the most relevant credit quality indicator for the class segments presented above. The migration of loans through the various internal risk rating categories is a significant component of the allowance for credit loss methodology, which bases the probability of default on this migration. Assigning risk ratings involves judgment. Risk ratings are initially assigned to loans by loan officers and are reviewed on a regular basis by credit administration staff. The Corporation's loan review officers provide a separate assessment of risk rating accuracy. Ratings may be changed based on the ongoing monitoring procedures performed by loan officers or credit administration staff, or if specific loan review activities identify a deterioration or an improvement in the loan.

	The Corporation does not assign internal risk ratings to smaller balance, homogeneous loans, such as home equity, residential mortgage, consumer, lease receivables and construction loans to individuals secured by residential real estate. For these loans, the most relevant credit quality indicator is delinquency status. The migration of loans through the various delinquency status categories is a significant component of the allowance for credit losses methodology for those loans, which bases the probability of default on this migration.
	The following table presents a summary of delinquency and non-performing status for home equity, real estate - residential mortgages, construction loans to individuals and consumer, leasing and other loans by class segment:


		Performing								Delinquent (1)								Non-performing (2)								Total
		March 31, 2015				December 31, 2014				March 31, 2015				December 31, 2014				March 31, 2015				December 31, 2014				March 31, 2015				December 31, 2014
		(dollars in thousands)
	Real estate - home equity	$	1,674,544			$	1,711,017			$	12,624			$	10,931			$	14,455			$	14,740			$	1,701,623			$	1,736,688

	Real estate - residential mortgage	1,312,299				1,321,139				23,894				26,934				28,595				28,995				1,364,788				1,377,068

	Construction - other	52,119				59,180				417				—				329				332				52,865				59,512

	Consumer - direct	97,959				104,018				2,919				2,891				2,390				2,414				103,268				109,323

	Consumer - indirect	152,286				153,358				1,653				2,574				94				176				154,033				156,108

	Total consumer	250,245				257,376				4,572				5,465				2,484				2,590				257,301				265,431

	Leasing and other and overdrafts	122,255				118,550				1,976				523				24				133				124,255				119,206

		$	3,411,462			$	3,467,262			$	43,483			$	43,853			$	45,887			$	46,790			$	3,500,832			$	3,557,905

	% of Total	97.5		%		97.5		%		1.2		%		1.2		%		1.3		%		1.3		%		100		%		100		%


	-1	Includes all accruing loans 31 days to 89 days past due.

	-2	Includes all accruing loans 90 days or more past due and all non-accrual loans.
Non-Performing Assets	The following table presents non-performing assets:


		March 31,				December 31,
		2015				2014
		(in thousands)
	Non-accrual loans	$	129,929			$	121,080

	Accruing loans greater than 90 days past due	19,365				17,402

	Total non-performing loans	149,294				138,482

	Other real estate owned (OREO)	14,251				12,022

	Total non-performing assets	$	163,545			$	150,504

Troubled Debt Restructurings on Financing Receivables	The following table presents TDRs, by class segment:


		March 31,				December 31,
		2015				2014
		(in thousands)
	Real-estate - residential mortgage	$	31,574			$	31,308

	Real-estate - commercial mortgage	23,468				18,822

	Construction - commercial residential	7,791				9,241

	Commercial - secured	6,786				5,170

	Real estate - home equity	3,084				2,975

	Commercial - unsecured	189				67

	Consumer - indirect	17				19

	Consumer - direct	17				19

	Total accruing TDRs	72,926				67,621

	Non-accrual TDRs (1)	29,392				24,616

	Total TDRs	$	102,318			$	92,237



	-1	Included within non-accrual loans in the preceding table detailing non-performing assets
Loan Terms Modified Under Troubled Debt Restructurings	The following table presents TDRs, by class segment as of March 31, 2015 and 2014 that were modified during the three months ended March 31, 2015 and 2014:


		2015						2014
		Number of Loans		Recorded Investment				Number of Loans		Recorded Investment
		(dollars in thousands)
	Commercial - secured	8		$	6,776			—		$	—

	Real estate - commercial mortgage	3		2,495				7		7,470

	Construction - commercial residential	1		889				1		548

	Real estate - residential mortgage	4		610				6		706

	Real estate - home equity	10		492				10		529

	Commercial - unsecured	1		42				—		—

	Consumer - indirect	1		13				3		1

	Consumer - direct	—		—				4		4

	Total	28		$	11,317			31		$	9,258


	The following table presents TDRs, by class segment as of March 31, 2015 and 2014 that were modified within the previous 12 months and had a post-modification payment default during the three months ended March 31, 2015 and 2014. The Corporation defines a payment default as a single missed payment.


		2015						2014
		Number of Loans		Recorded Investment				Number of Loans		Recorded Investment
		(dollars in thousands)
	Commercial - secured	7		$	7,888			1		$	11

	Real estate - commercial mortgage	2		1,659				3		126

	Construction - commercial residential	1		1,366				1		619

	Real estate - home equity	7		816				14		1,432

	Real estate - residential mortgage	8		748				12		2,522

	Total	25		$	12,477			31		$	4,710

Past due Loan Status and Non-Accrual Loans by Portfolio Segment	The following table presents past due status and non-accrual loans by portfolio segment and class segment:


		March 31, 2015
		31-59				60-89				≥ 90 Days				Non-				Total ≥ 90				Total Past				Current				Total
		Days Past				Days Past				Past Due				accrual				Days				Due
		Due				Due				and
										Accruing
		(in thousands)
	Real estate - commercial mortgage	$	20,528			$	5,620			$	40			$	46,291			$	46,331			$	72,479			$	5,154,622			$	5,227,101

	Commercial - secured	8,056				1,002				3,646				38,548				42,194				51,252				3,557,134				3,608,386

	Commercial - unsecured	832				58				—				1,071				1,071				1,961				152,284				154,245

	Total commercial - industrial, financial and agricultural	8,888				1,060				3,646				39,619				43,265				53,213				3,709,418				3,762,631

	Real estate - home equity	10,347				2,277				4,785				9,670				14,455				27,079				1,674,544				1,701,623

	Real estate - residential mortgage	16,375				7,519				8,242				20,353				28,595				52,489				1,312,299				1,364,788

	Construction - commercial residential	1,559				151				98				12,442				12,540				14,250				217,283				231,533

	Construction - commercial	—				—				—				1,271				1,271				1,271				392,137				393,408

	Construction - other	417				—				48				281				329				746				52,119				52,865

	Total real estate - construction	1,976				151				146				13,994				14,140				16,267				661,539				677,806

	Consumer - direct	1,978				941				2,390				—				2,390				5,309				97,959				103,268

	Consumer - indirect	1,422				231				92				2				94				1,747				152,286				154,033

	Total consumer	3,400				1,172				2,482				2				2,484				7,056				250,245				257,301

	Leasing and other and overdrafts	1,666				310				24				—				24				2,000				122,255				124,255

	Total	$	63,180			$	18,109			$	19,365			$	129,929			$	149,294			$	230,583			$	12,884,922			$	13,115,505



		31-Dec-14
		31-59				60-89				≥ 90 Days				Non-				Total ≥ 90				Total Past				Current				Total
		Days Past				Days Past				Past Due				accrual				Days				Due
		Due				Due				and
										Accruing
		(in thousands)
	Real estate - commercial mortgage	$	14,399			$	3,677			$	800			$	44,437			$	45,237			$	63,313			$	5,133,842			$	5,197,155

	Commercial - secured	4,839				958				610				28,747				29,357				35,154				3,529,460				3,564,614

	Commercial - unsecured	395				65				9				1,022				1,031				1,491				159,462				160,953

	Total commercial - industrial, financial and agricultural	5,234				1,023				619				29,769				30,388				36,645				3,688,922				3,725,567

	Real estate - home equity	8,048				2,883				4,257				10,483				14,740				25,671				1,711,017				1,736,688

	Real estate - residential mortgage	18,789				8,145				8,952				20,043				28,995				55,929				1,321,139				1,377,068

	Construction - commercial residential	160				—				—				13,463				13,463				13,623				190,047				203,670

	Construction - commercial	—				—				—				2,604				2,604				2,604				424,815				427,419

	Construction - other	—				—				51				281				332				332				59,180				59,512

Total real estate - construction	160				—				51				16,348				16,399				16,559				674,042				690,601

Consumer - direct	2,034				857				2,414				—				2,414				5,305				104,018				109,323

Consumer - indirect	2,156				418				176				—				176				2,750				153,358				156,108

Total consumer	4,190				1,275				2,590				—				2,590				8,055				257,376				265,431

Leasing and other and overdrafts	357				166				133				—				133				656				118,550				119,206

Total	$	51,177			$	17,169			$	17,402			$	121,080			$	138,482			$	206,828			$	12,904,888			$	13,111,716

Mortgage_Servicing_Rights_Tabl

Mortgage Servicing Rights (Tables)	3 Months Ended
	Mar. 31, 2015
Transfers and Servicing [Abstract]
Summary of Changes in Mortgage Servicing Rights	The following table summarizes the changes in mortgage servicing rights ("MSRs"), which are included in other assets on the consolidated balance sheets:


		Three months ended March 31
		2015			2014
		(in thousands)
	Amortized cost:
	Balance at beginning of period	$	42,148		$	42,452

	Originations of mortgage servicing rights	1,557			1,115

	Amortization	(1,902		)	(1,899		)
	Balance at end of period	$	41,803		$	41,668

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Compensation Expense and Related Tax Benefits	The following table presents compensation expense and the related tax benefits for equity awards recognized in the consolidated statements of income:


		Three months ended March 31
		2015			2014
		(in thousands)
	Stock-based compensation expense	$	1,071		$	1,033

	Tax benefit	(292		)	(263		)
	Stock-based compensation expense, net of tax	$	779		$	770

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables)	3 Months Ended
	Mar. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Schedule of Defined Benefit Plans Disclosures [Table Text Block]	The net periodic benefit cost for the Corporation’s Pension Plan consisted of the following components:


		Three months ended March 31
		2015			2014
		(in thousands)
	Service cost (1)	$	145		$	92

	Interest cost	851			853

	Expected return on plan assets	(752		)	(811		)
	Net amortization and deferral	782			244

	Net periodic benefit cost	$	1,026		$	378



	-1	The Pension Plan service cost recorded for the three months ended March 31, 2015 and 2014 was related to administrative costs associated with the plan and was not due to the accrual of additional participant benefits.
	The net periodic cost (benefit) of the Corporation’s Postretirement Plan consisted of the following components, excluding the $1.5 million plan amendment gain in 2014:


		Three months ended March 31
		2015			2014
		(in thousands)
	Service cost (1)	$	—		$	15

	Interest cost	52			61

	Net accretion and deferral	(65		)	(95		)
	Net periodic benefit	$	(13	)	$	(19	)


	-1	As a result of the plan amendment, additional participant benefits are not accrued under the Postretirement Plan after February 1, 2014.

Derivative_Financial_Instrumen1

Derivative Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of Notional Amounts and Fair Values of Derivative Financial Instruments	The following table presents a summary of the notional amounts and fair values of derivative financial instruments:


		March 31, 2015						December 31, 2014
		Notional			Asset			Notional		Asset
		Amount			(Liability)			Amount		(Liability)
					Fair Value					Fair Value
		(in thousands)
	Interest Rate Locks with Customers
	Positive fair values	$	151,389		$	2,509		$	89,655	$	1,391

	Negative fair values	187			(2		)	301		(6		)

	Net interest rate locks with customers				2,507					1,385

	Forward Commitments
	Negative fair values	144,370			(610		)	93,802		(1,164		)

	Interest Rate Swaps with Customers
	Positive fair values	535,786			29,035			468,080		19,716

	Negative fair values	8,000			(113		)	25,418		(198		)

	Net interest rate swaps with customers				28,922					19,518

	Interest Rate Swaps with Dealer Counterparties
	Positive fair values	8,000			113			25,418		198

	Negative fair values	535,786			(29,035		)	468,080		(19,716		)

	Net interest rate swaps with dealer counterparties				(28,922		)			(19,518		)
	Foreign Exchange Contracts with Customers
	Positive fair values	12,642			1,411			11,616		810

	Negative fair values	7,033			(475		)	5,250		(441		)

	Net foreign exchange contracts with customers				936					369

	Foreign Exchange Contracts with Correspondent Banks
	Positive fair values	8,053			952			5,287		446

	Negative fair values	14,825			(1,706		)	13,572		(876		)

	Net foreign exchange contracts with correspondent banks				(754		)			(430		)
	Net derivative fair value asset				$	2,079				$	160

Summary of Fair Value Gains and Losses on Derivative Financial Instruments	The following table presents a summary of the fair value gains and losses on derivative financial instruments:


		Three months ended March 31
		2015			2014
		(in thousands)
	Interest rate locks with customers	$	1,122		$	389

	Forward commitments	554			(1,498		)

	Interest rate swaps with customers	9,404			4,205

	Interest rate swaps with dealer counterparties	(9,404		)	(4,205		)
	Foreign exchange contracts with customers	567			192

	Foreign exchange contracts with correspondent banks	(324		)	(268		)
	Net fair value gains (losses) on derivative financial instruments	$	1,919		$	(1,185	)

Fair_Value_Option_Tables

Fair Value Option (Tables)	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Summary of Corporation's Mortgage Loans Held for Sale	The following table presents a summary of the Corporation’s mortgage loans held for sale:


		March 31,		December 31,
		2015		2014
		(in thousands)
	Cost	$	33,421	$	17,080

	Fair value	34,124		17,522

Balance_Sheet_Offsetting_Table

Balance Sheet Offsetting (Tables)	3 Months Ended
	Mar. 31, 2015
Offsetting [Abstract]
Balance Sheet Offsetting

		Gross Amounts		Gross Amounts Not Offset
		Recognized		on the Consolidated
		on the		Balance Sheets
		Consolidated		Financial			Cash			Net
		Balance Sheets		Instruments (1)			Collateral (2)			Amount
		(in thousands)
	March 31, 2015
	Interest rate swap derivative assets	$	29,148	$	(113	)	$	—		$	29,035

	Foreign exchange derivative assets with correspondent banks	952		(952		)	—			—

	Total	$	30,100	$	(1,065	)	$	—		$	29,035


	Interest rate swap derivative liabilities	$	29,148	$	(113	)	$	(28,070	)	$	965

	Foreign exchange derivative liabilities with correspondent banks	1,706		(952		)	(940		)	(186		)

	Total	$	30,854	$	(1,065	)	$	(29,010	)	$	779


	31-Dec-14
	Interest rate swap derivative assets	$	19,914	$	(206	)	$	—		$	19,708

	Foreign exchange derivative assets with correspondent banks	446		(446		)	—			—

	Total	$	20,360	$	(652	)	$	—		$	19,708


	Interest rate swap derivative liabilities	$	19,914	$	(206	)	$	(19,210	)	$	498

	Foreign exchange derivative liabilities with correspondent banks	876		(446		)	(310		)	120

	Total	$	20,790	$	(652	)	$	(19,520	)	$	618



	-1	For interest rate swap and foreign exchange derivative assets, amounts represent any derivative liability fair values that could be offset in the event of counterparty or customer default. For interest rate swap and foreign exchange derivative liabilities, amounts represent any derivative asset fair values that could be offset in the event of counterparty or customer default.

	-2	Amounts represent cash collateral posted on interest rate swap transactions with financial institution counterparties. Interest rate swaps with customers are collateralized by the underlying loans to those borrowers.

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Summary of Outstanding Commitments to Extend Credit and Letters of Credit	The outstanding amounts of commitments to extend credit and letters of credit were as follows:


		March 31,		December 31, 2014
		2015
		(in thousands)
	Commitments to extend credit	$	4,575,869	$	4,389,064

	Standby letters of credit	379,947		382,465

	Commercial letters of credit	36,049		32,304

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The following tables present summaries of the Corporation’s assets and liabilities measured at fair value on a recurring basis and reported on the consolidated balance sheets:


		March 31, 2015
		Level 1			Level 2			Level 3			Total
		(in thousands)
	Mortgage loans held for sale	$	—		$	34,124		$	—		$	34,124

	Available for sale investment securities:
	Equity securities	40,608			—			—			40,608

	U.S. Government sponsored agency securities	—			203			—			203

	State and municipal securities	—			224,342			—			224,342

	Corporate debt securities	—			92,778			4,904			97,682

	Collateralized mortgage obligations	—			867,876			—			867,876

	Mortgage-backed securities	—			930,159			—			930,159

	Auction rate securities	—			—			98,932			98,932

	Total available for sale investments	40,608			2,115,358			103,836			2,259,802

	Other assets	19,198			31,657			—			50,855

	Total assets	$	59,806		$	2,181,139		$	103,836		$	2,344,781

	Other liabilities	$	19,009		$	29,760		$	—		$	48,769



		December 31, 2014
		Level 1			Level 2			Level 3			Total
		(in thousands)
	Mortgage loans held for sale	$	—		$	17,522		$	—		$	17,522

	Available for sale investment securities:
	Equity securities	47,623			—			—			47,623

	U.S. Government securities	—			200			—			200

	U.S. Government sponsored agency securities	—			214			—			214

	State and municipal securities	—			245,215			—			245,215

	Corporate debt securities	—			90,126			7,908			98,034

	Collateralized mortgage obligations	—			902,313			—			902,313

	Mortgage-backed securities	—			928,831			—			928,831

	Auction rate securities	—			—			100,941			100,941

	Total available for sale investments	47,623			2,166,899			108,849			2,323,371

	Other assets	17,682			21,305			—			38,987

	Total assets	$	65,305		$	2,205,726		$	108,849		$	2,379,880

	Other liabilities	$	17,737		$	21,084		$	—		$	38,821

Schedule of Changes in Assets and Liabilities Measured at Fair Value on a Recurring Basis using Level 3 Inputs	The following table presents the changes in the Corporation’s available for sale investment securities measured at fair value on a recurring basis using unobservable inputs (Level 3):


		Three months ended March 31, 2015
		Pooled Trust			Single-issuer			ARCs
		Preferred			Trust Preferred
		Securities			Securities
		(in thousands)
	Balance at December 31, 2014	$	4,088		$	3,820		$	100,941

	Sales	(3,079		)	—			—

	Unrealized adjustment to fair value (1)	190			(2		)	332

	Settlements - calls	(117		)	—			(2,446		)

	Discount accretion (2)	2			2			105

	Balance at March 31, 2015	$	1,084		$	3,820		$	98,932


		Three months ended March 31, 2014
	Balance at December 31, 2013	$	5,306		$	3,781		$	159,274

	Sales	—			—			(11,912		)

	Unrealized adjustment to fair value (1)	521			38			124

	Settlements - calls	(172		)	—			—

	Discount accretion (2)	4			1			227

	Balance at March 31, 2014	$	5,659		$	3,820		$	147,713



	-1	Pooled trust preferred securities, single-issuer trust preferred securities and ARCs are classified as available for sale investment securities; as such, the unrealized adjustment to fair value was recorded as an unrealized holding gain (loss) and included as a component of available for sale investment securities on the consolidated balance sheets.

	-2	Included as a component of net interest income on the consolidated statements of income.
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis	The following table presents the Corporation’s financial assets measured at fair value on a nonrecurring basis and reported on the Corporation’s consolidated balance sheets:


		March 31, 2015
		Level 1			Level 2			Level 3			Total
		(in thousands)
	Net loans	$	—		$	—		$	148,698		$	148,698

	Other financial assets	—			—			56,054			56,054

	Total assets	$	—		$	—		$	204,752		$	204,752



		December 31, 2014
		Level 1			Level 2			Level 3			Total
		(in thousands)
	Net loans	$	—		$	—		$	127,834		$	127,834

	Other financial assets	—			—			54,170			54,170

	Total assets	$	—		$	—		$	182,004		$	182,004

Details of Book Value and Fair Value of Financial Instruments	As required by FASB ASC Section 825-10-50, the following table details the book values and estimated fair values of the Corporation’s financial instruments as of March 31, 2015 and December 31, 2014. In addition, a general description of the methods and assumptions used to estimate such fair values is also provided.


		March 31, 2015						December 31, 2014
		Book Value			Estimated			Book Value			Estimated
					Fair Value						Fair Value
		(in thousands)
	FINANCIAL ASSETS
	Cash and due from banks	$	91,870		$	91,870		$	105,702		$	105,702

	Interest-bearing deposits with other banks	637,973			637,973			358,130			358,130

	Federal Reserve Bank and Federal Home Loan Bank stock	65,694			65,694			64,953			64,953

	Loans held for sale (1)	34,124			34,124			17,522			17,522

	Available for sale investment securities (1)	2,259,802			2,259,802			2,323,371			2,323,371

	Loans, net of unearned income (1)	13,115,505			13,078,115			13,111,716			13,030,543

	Accrued interest receivable	42,216			42,216			41,818			41,818

	Other financial assets (1)	178,496			178,496			169,764			169,764

	FINANCIAL LIABILITIES
	Demand and savings deposits	$	10,467,077		$	10,467,077		$	10,296,055		$	10,296,055

	Time deposits	3,047,420			3,058,030			3,071,451			3,069,883

	Short-term borrowings	410,105			410,105			329,719			329,719

	Accrued interest payable	18,357			18,357			18,045			18,045

	Other financial liabilities (1)	193,924			193,924			172,786			172,786

	Federal Home Loan Bank advances and long-term debt	1,094,517			1,104,738			1,139,413			1,142,980



	-1	These financial instruments, or certain financial instruments within these categories, are measured at fair value on the Corporation’s consolidated balance sheets. Descriptions of the fair value determinations for these financial instruments are disclosed above.

Basis_of_Presentation_Basis_of1

Basis of Presentation Basis of Presentation (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Tax Credit Carryforward [Line Items]
Income Tax Expense (Benefit)	$13,504,000	$14,234,000
Other Assets
Tax Credit Carryforward [Line Items]
Investments, low income housing	164,900,000		155,600,000
LIH Low Income Housing
Tax Credit Carryforward [Line Items]
Income Tax Expense (Benefit)	($2,500,000)	($2,500,000)

Net_Income_Per_Share_Reconcili

Net Income Per Share Reconciliation of Weighted Average Common Shares Outstanding (Details)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Weighted average shares outstanding (basic)	178,471	189,467
Impact of common stock equivalents	986	1,022
Weighted average shares outstanding (diluted)	179,457	190,489

Net_Income_Per_Share_Narrative

Net Income Per Share Narrative (Details) (Stock Option [Member])	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	2.1	3.1

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income Changes in Other Comprehensive Income (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Equity [Abstract]
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax	$15,371	$21,435
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	-5,379	-7,502
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	9,992	13,933
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, before Tax	-4,145
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Tax	1,450
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax	-2,695	0
Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Income (Loss), before Tax, Including Portion Attributable to Noncontrolling Interest	192	291
Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	-67	-102
Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	125	189
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	52	52
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	-18	-18
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	34	34
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit) Recognized in Net Periodic Benefit Cost, before Tax	717	149
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Pension Cost, Tax Effect	-251	-53
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Pension Cost, Net of Tax	466	96
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), before Tax		-1,452
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), Tax		508
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net (Gain) Loss, Net of Tax	0	-944
Other comprehensive income, pension and other postretirement benefit plans, net unamortized gain (loss) arising during period, before tax		3,291
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Tax		-1,147
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	0	2,144
Other Comprehensive Income (Loss), before Tax	12,187	23,766
Other Comprehensive Income (Loss), Tax	-4,265	-8,314
Other Comprehensive Income	$7,922	$15,452

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive Income Components of Other Comprehensive Income (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	($17,722)	($37,341)
Other comprehensive income before reclassifications	10,117	16,266
Amounts reclassified from accumulated other comprehensive income (loss)	-2,195	-814
Ending Balance	-9,800	-21,889
Unrealized Gains on Investment Securities Not Other-Than-Temporarily Impaired [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	5,980	-27,510
Other comprehensive income before reclassifications	9,992	13,933
Amounts reclassified from accumulated other comprehensive income (loss)	-1,661	0
Ending Balance	14,311	-13,577
Unrealized Non-Credit Losses on Other-Than-Temporarily Impaired Debt Securities [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	1,349	1,652
Other comprehensive income before reclassifications	125	189
Amounts reclassified from accumulated other comprehensive income (loss)	-1,034	0
Ending Balance	440	1,841
Unrealized Effective Portions of Losses on Forward-Starting Interest Rate Swaps [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	-2,546	-2,682
Amounts reclassified from accumulated other comprehensive income (loss)	34	34
Ending Balance	-2,512	-2,648
Unrecognized Pension and Postretirement Plan Income (Costs) [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	-22,505	-8,801
Other comprehensive income before reclassifications		2,144
Amounts reclassified from accumulated other comprehensive income (loss)	466	-848
Ending Balance	($22,039)	($7,505)

Investment_Securities_Schedule

Investment Securities Schedule of Amortized Cost and Fair Values of Investment Securities (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Schedule of Investments [Line Items]
Amortized Cost	$2,237,100	$2,312,087
Gross Unrealized Gains	49,610	49,212
Gross Unrealized Losses	-26,908	-37,928
Estimated Fair Value	2,259,802	2,323,371
Equity Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	29,224	33,469
Gross Unrealized Gains	11,397	14,167
Gross Unrealized Losses	-13	-13
Estimated Fair Value	40,608	47,623
U.S. Government Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost		200
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Estimated Fair Value		200
U.S. Government-Sponsored Agency Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	198	209
Gross Unrealized Gains	5	5
Gross Unrealized Losses	0	0
Estimated Fair Value	203	214
State and Municipal Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	216,877	238,250
Gross Unrealized Gains	7,496	7,231
Gross Unrealized Losses	-31	-266
Estimated Fair Value	224,342	245,215
Corporate Debt Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	99,120	99,016
Gross Unrealized Gains	3,929	5,126
Gross Unrealized Losses	-5,367	-6,108
Estimated Fair Value	97,682	98,034
Collateralized Mortgage Obligations [Member]
Schedule of Investments [Line Items]
Amortized Cost	874,853	917,395
Gross Unrealized Gains	5,924	5,705
Gross Unrealized Losses	-12,901	-20,787
Estimated Fair Value	867,876	902,313
Mortgage-Backed Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	910,418	914,797
Gross Unrealized Gains	20,859	16,978
Gross Unrealized Losses	-1,118	-2,944
Estimated Fair Value	930,159	928,831
Auction Rate Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	106,410	108,751
Gross Unrealized Gains	0	0
Gross Unrealized Losses	-7,478	-7,810
Estimated Fair Value	$98,932	$100,941

Investment_Securities_Schedule1

Investment Securities Schedule of Amortized Cost and Fair Values of Debt Securities by Contractual Maturities (Details) (USD $)	Mar. 31, 2015
In Thousands, unless otherwise specified	Mar. 31, 2015
Schedule of Investments [Line Items]
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis	$29,323
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value	30,124
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis	74,801
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value	78,246
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis	140,219
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value	144,978
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	178,262
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	167,811
Available for Sale Securities, Debt Securities, Amortized Cost, Before Securities Without Debt Maturities	422,605
Available for Sale Securities, Debt Maturities, Before Securities Without Single Maturities	421,159
Available-for-sale Debt Securities, Amortized Cost Basis	2,207,876
Available for Sale, Estimated Fair Value	2,219,194
Collateralized Mortgage Obligations [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost Basis	874,853
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	867,876
Mortgage-Backed Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost Basis	910,418
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	$930,159

Investment_Securities_Summary_

Investment Securities Summary of Gains and Losses from Equity and Debt Securities, and Losses from Other-than-Temporary Impairment (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Gain (Loss) on Investments [Line Items]
Gross Realized Gains	$4,145	$323
Gross Realized Losses	0	-323
Net Gains (Losses)	4,145	0
Equity Securities [Member]
Gain (Loss) on Investments [Line Items]
Gross Realized Gains	1,970	1
Gross Realized Losses	0	0
Net Gains (Losses)	1,970	1
Debt Securities [Member]
Gain (Loss) on Investments [Line Items]
Gross Realized Gains	2,175	322
Gross Realized Losses	0	-323
Net Gains (Losses)	$2,175	($1)

Investment_Securities_Summary_1

Investment Securities Summary of Cumulative Other-than-Temporary Impairment Charges Recognized as Components of Earnings (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Balance of cumulative credit losses on debt securities, beginning of period	($16,242)	($20,691)
Reductions for securities sold during the period	3,938	0
Reductions for increases in cash flows expected to be collected that are recognized over the remaining life of the security	2	4
Balance of cumulative credit losses on debt securities, end of period	($12,302)	($20,687)

Investment_Securities_Gross_Un

Investment Securities Gross Unrealized Losses and Fair Values of Investments by Category and Length of Time in a Continuous Unrealized Loss Position (Details) (USD $)	Mar. 31, 2015
In Thousands, unless otherwise specified	Mar. 31, 2015
Schedule of Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$161,346
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-494
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	753,251
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	-26,414
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	914,597
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	-26,908
Municipal Bonds [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	5,953
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-31
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	5,953
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	-31
Corporate Debt Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	4,970
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-4
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	34,600
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	-5,363
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	39,570
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	-5,367
Collateralized Mortgage Obligations [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	34,287
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-132
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	547,418
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	-12,769
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	581,705
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	-12,901
Mortgage-Backed Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	116,136
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-327
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	72,224
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	-791
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	188,360
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	-1,118
Auction Rate Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	98,932
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	-7,478
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	98,932
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	-7,478
Debt Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	161,346
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-494
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	753,174
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	-26,401
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	914,520
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	-26,895
Equity Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	77
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	-13
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	77
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	($13)

Investment_Securities_Summary_2

Investment Securities Summary of Amortized Cost and Fair Values of Corporate Debt Securities (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	$2,207,876
Corporate debt securities	2,219,194
Corporate Debt Securities Issued by Financial Institutions [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	95,558	97,109
Corporate debt securities	94,120	96,127
Single-issuer Trust Preferred Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	47,590	47,569
Corporate debt securities	42,863	42,016
Subordinated Debt [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	47,563	47,530
Corporate debt securities	50,173	50,023
Pooled Trust Preferred Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	405	2,010
Corporate debt securities	1,084	4,088
Other Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	3,562	1,907
Corporate debt securities	3,562	1,907
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	99,120	99,016
Corporate debt securities	$97,682	$98,034

Investment_Securities_Narrativ

Investment Securities Narrative (Details) (USD $)	3 Months Ended
Investment Securities Narrative (Details) (USD $)	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Schedule of Investments [Line Items]
Available-for-sale Securities Pledged as Collateral	$1,600,000,000		$1,700,000,000
Amortized cost	2,237,100,000		2,312,087,000
Available-for-sale Securities, Gross Realized Gain (Loss)	4,145,000	0
Available-for-sale Securities, Fair Value Disclosure	2,259,802,000		2,323,371,000
Single Bank Stock Investment, cost basis	15,700,000
Single Bank Stock Investment, Fair Value	23,200,000
Percent Ownership In An Individual Financial Institution	66.70%
IndividualBankStockInvestmentPercenttoTotalPortfolio	5.00%
Auction Rate Certificates Not Subject To Any Additional Other Than Temporary Impairment Charges Fair Value	98,900,000
Domestic Corporate debt securities	97,700,000
Equity Securities [Member]
Schedule of Investments [Line Items]
Amortized cost	29,224,000		33,469,000
Available-for-sale Securities, Gross Realized Gain (Loss)	1,970,000	1,000
Available-for-sale Securities, Fair Value Disclosure	40,608,000		47,623,000
Equity Securities Financial Institution [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Equity Securities	34,700,000		41,800,000
Amortized cost	23,400,000
Available-for-sale Securities, Fair Value Disclosure	34,700,000
Equity Securities, Other [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Equity Securities	5,900,000		5,800,000
Auction Rate Securities [Member]
Schedule of Investments [Line Items]
Amortized cost	106,410,000		108,751,000
Available-for-sale Securities, Fair Value Disclosure	98,932,000		100,941,000
Pooled Trust Preferred Securities [Member]
Schedule of Investments [Line Items]
Amortized cost	1,500,000
Available-for-sale Securities, Gross Realized Gain (Loss)	2,200,000
Number of Securities Sold	2
Single-issuer Trust Preferred Securities [Member]
Schedule of Investments [Line Items]
Unrealized Loss on Securities	4,700,000
Number of Trust Preferred Securities	20
Number of Trust Preferred Securities Not Rated	3
Moody's, A2 Rating [Member] \| Auction Rate Securities [Member]
Schedule of Investments [Line Items]
Carrying Value Auction Rate Securities Rated Investment Grade	93,000,000
Percentage Auction Rate Securities Investment Grade	95.00%
Moody's, A3 Rating [Member] \| Auction Rate Securities [Member]
Schedule of Investments [Line Items]
Carrying Value Auction Rate Securities Rated Investment Grade	6,000,000
Percentage Auction Rate Securities Investment Grade	5.00%
External Credit Rating, BBB [Member] \| Single-issuer Trust Preferred Securities [Member]
Schedule of Investments [Line Items]
Amortized cost	4,700,000
Available-for-sale Securities, Fair Value Disclosure	3,800,000
External Credit Rating, Rated Below Investment Grade [Member] \| Pooled Trust Preferred Securities [Member]
Schedule of Investments [Line Items]
Amortized cost	405,000
Available-for-sale Securities, Fair Value Disclosure	1,100,000
Number of Trust Preferred Securities	3
External Credit Rating, Rated Below Investment Grade [Member] \| Single-issuer Trust Preferred Securities [Member]
Schedule of Investments [Line Items]
Amortized cost	14,500,000
Available-for-sale Securities, Fair Value Disclosure	$12,800,000
Number of Trust Preferred Securities	7

Loans_and_Allowance_for_Credit2

Loans and Allowance for Credit Losses Summary Of Gross Loans (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, gross of unearned income	$13,128,523	$13,124,093
Unearned income	-13,018	-12,377
Loans, net of unearned income	13,115,505	13,111,716	12,733,792
Real-estate commercial mortage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, gross of unearned income	5,227,101	5,197,155
Loans, net of unearned income	5,227,101	5,197,155	5,137,454
Commercial - industrial, financial, and agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, gross of unearned income	3,762,631	3,725,567
Loans, net of unearned income	3,762,631	3,725,567	3,574,130
Real-estate - home equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, gross of unearned income	1,701,623	1,736,688
Loans, net of unearned income	1,701,623	1,736,688	1,740,496
Real-estate - residential mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, gross of unearned income	1,364,788	1,377,068
Loans, net of unearned income	1,364,788	1,377,068	1,331,465
Real-estate - construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, gross of unearned income	677,806	690,601
Loans, net of unearned income	677,806	690,601	584,217
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, gross of unearned income	257,301	265,431
Loans, net of unearned income	257,301	265,431	270,021
Leasing and other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, gross of unearned income	135,552	127,562
Overdrafts [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, gross of unearned income	$1,721	$4,021

Loans_and_Allowance_for_Credit3

Loans and Allowance for Credit Losses Allowance for Credit Losses (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Receivables [Abstract]
Allowance for loan losses	$177,701	$184,144	$197,089	$202,780
Reserve for unfunded lending commitments	1,957	1,787
Allowance for credit losses	$179,658	$185,931	$199,006	$204,917

Loans_and_Allowance_for_Credit4

Loans and Allowance for Credit Losses Activity in the Allowance for Credit Losses (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	$185,931	$204,917
Loans charged off	-5,764	-10,268
Recoveries of loans previously charged off	3,191	1,857
Net loans charged off	-2,573	-8,411
Provision for credit losses	-3,700	2,500
Balance at end of period	$179,658	$199,006

Loans_and_Allowance_for_Credit5

Loans and Allowance for Credit Losses Allowance for Loan Losses by Portfolio Segment (Details) (USD $)	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	$184,144,000		$202,780,000
Loans charged off	-5,764,000		-10,268,000
Recoveries of loans previously charged off	3,191,000		1,857,000
Net loans charged off	-2,573,000		-8,411,000
Provision for loan losses	-3,870,000	[1]	2,720,000	[1]
Ending Balance	177,701,000		197,089,000
Provision for loan losses gross	-170,000		220,000
Provision for Loan and Lease Losses	-3,700,000		2,500,000
Real-estate commercial mortage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	53,493,000		55,659,000
Loans charged off	-709,000		-1,386,000
Recoveries of loans previously charged off	436,000		44,000
Net loans charged off	-273,000		-1,342,000
Provision for loan losses	-360,000	[1]	-560,000	[1]
Ending Balance	52,860,000		53,757,000
Commercial - industrial, financial, and agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	51,378,000		50,330,000
Loans charged off	-1,863,000		-5,125,000
Recoveries of loans previously charged off	786,000		744,000
Net loans charged off	-1,077,000		-4,381,000
Provision for loan losses	6,849,000	[1]	4,614,000	[1]
Ending Balance	57,150,000		50,563,000
Real-estate - home equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	28,271,000		28,222,000
Loans charged off	-768,000		-1,651,000
Recoveries of loans previously charged off	251,000		356,000
Net loans charged off	-517,000		-1,295,000
Provision for loan losses	-4,273,000	[1]	5,533,000	[1]
Ending Balance	23,481,000		32,460,000
Real-estate - residential mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	29,072,000		33,082,000
Loans charged off	-1,281,000		-846,000
Recoveries of loans previously charged off	159,000		116,000
Net loans charged off	-1,122,000		-730,000
Provision for loan losses	-4,715,000	[1]	977,000	[1]
Ending Balance	23,235,000		33,329,000
Real-estate - construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	9,756,000		12,649,000
Loans charged off	0		-214,000
Recoveries of loans previously charged off	1,147,000		224,000
Net loans charged off	1,147,000		10,000
Provision for loan losses	-2,416,000	[1]	-2,817,000	[1]
Ending Balance	8,487,000		9,842,000
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	3,015,000		3,260,000
Loans charged off	-780,000		-751,000
Recoveries of loans previously charged off	241,000		209,000
Net loans charged off	-539,000		-542,000
Provision for loan losses	51,000	[1]	606,000	[1]
Ending Balance	2,527,000		3,324,000
Leasing and other and overdrafts [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	1,799,000		3,370,000
Loans charged off	-363,000		-295,000
Recoveries of loans previously charged off	171,000		164,000
Net loans charged off	-192,000		-131,000
Provision for loan losses	46,000	[1]	-1,228,000	[1]
Ending Balance	1,653,000		2,011,000
Unallocated [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	7,360,000		16,208,000
Loans charged off	0		0
Recoveries of loans previously charged off	0		0
Net loans charged off	0		0
Provision for loan losses	948,000	[1]	-4,405,000	[1]
Ending Balance	$8,308,000	[2]	$11,803,000	[2]

[1]	The provision for loan losses excluded a $170,000 increase and $220,000 decrease in the reserve for unfunded lending commitments for the three months ended MarchÂ 31, 2015 and MarchÂ 31, 2014, respectively. The total provision for credit losses, comprised of allocations for both funded and unfunded loans, was a negative $3.7 million for the three months ended MarchÂ 31, 2015 and was $2.5 million for the three months ended MarchÂ 31, 2014.
[2]	The unallocated allowance, which was approximately 5% and 6% of the total allowance for credit losses as of MarchÂ 31, 2015 and MarchÂ 31, 2014, respectively, was, in the opinion of management, reasonable and appropriate given that the estimates used in the allocation process are inherently imprecise.

Loans_and_Allowance_for_Credit6

Loans and Allowance for Credit Losses Present Loans, Net of Unearned Income and Their Related Allowance for Loan Losses, by Portfolio Segment (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014	Mar. 31, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014	Mar. 31, 2014		Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses measured for impairment under FASB ASC Subtopic 450-20	$123,544			$133,188
Allowance for loan losses evaluated for impairment under FASB ASC Section 310-10-35	54,157			63,901
Allowance for loan losses	177,701		184,144	197,089		202,780
Loans, net of unearned income, measured for impairment under FASB ASC Subtopic 450-20	12,912,650			12,532,403
Loans, net of unearned income, evaluated for impairment under FASB ASC Subtopic 310-10-35	202,855			201,389
Loans, net of unearned income	13,115,505		13,111,716	12,733,792
Percentage of unallocated allowance	5.00%			6.00%
Real-estate commercial mortage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses measured for impairment under FASB ASC Subtopic 450-20	38,916			37,363
Allowance for loan losses evaluated for impairment under FASB ASC Section 310-10-35	13,944			16,394
Allowance for loan losses	52,860		53,493	53,757		55,659
Loans, net of unearned income, measured for impairment under FASB ASC Subtopic 450-20	5,157,342			5,075,556
Loans, net of unearned income, evaluated for impairment under FASB ASC Subtopic 310-10-35	69,759			61,898
Loans, net of unearned income	5,227,101		5,197,155	5,137,454
Commercial - industrial, financial, and agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses measured for impairment under FASB ASC Subtopic 450-20	40,027			36,859
Allowance for loan losses evaluated for impairment under FASB ASC Section 310-10-35	17,123			13,704
Allowance for loan losses	57,150		51,378	50,563		50,330
Loans, net of unearned income, measured for impairment under FASB ASC Subtopic 450-20	3,716,037			3,528,857
Loans, net of unearned income, evaluated for impairment under FASB ASC Subtopic 310-10-35	46,594			45,273
Loans, net of unearned income	3,762,631		3,725,567	3,574,130
Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses measured for impairment under FASB ASC Subtopic 450-20	16,937			22,969
Allowance for loan losses evaluated for impairment under FASB ASC Section 310-10-35	6,544			9,491
Allowance for loan losses	23,481		28,271	32,460		28,222
Loans, net of unearned income, measured for impairment under FASB ASC Subtopic 450-20	1,688,869			1,726,342
Loans, net of unearned income, evaluated for impairment under FASB ASC Subtopic 310-10-35	12,754			14,154
Loans, net of unearned income	1,701,623		1,736,688	1,740,496
Real-estate - residential mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses measured for impairment under FASB ASC Subtopic 450-20	9,162			11,618
Allowance for loan losses evaluated for impairment under FASB ASC Section 310-10-35	14,073			21,711
Allowance for loan losses	23,235		29,072	33,329		33,082
Loans, net of unearned income, measured for impairment under FASB ASC Subtopic 450-20	1,312,861			1,279,783
Loans, net of unearned income, evaluated for impairment under FASB ASC Subtopic 310-10-35	51,927			51,682
Loans, net of unearned income	1,364,788		1,377,068	1,331,465
Real-estate - construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses measured for impairment under FASB ASC Subtopic 450-20	6,037			7,256
Allowance for loan losses evaluated for impairment under FASB ASC Section 310-10-35	2,450			2,586
Allowance for loan losses	8,487		9,756	9,842		12,649
Loans, net of unearned income, measured for impairment under FASB ASC Subtopic 450-20	656,021			555,852
Loans, net of unearned income, evaluated for impairment under FASB ASC Subtopic 310-10-35	21,785			28,365
Loans, net of unearned income	677,806		690,601	584,217
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses measured for impairment under FASB ASC Subtopic 450-20	2,504			3,309
Allowance for loan losses evaluated for impairment under FASB ASC Section 310-10-35	23			15
Allowance for loan losses	2,527		3,015	3,324		3,260
Loans, net of unearned income, measured for impairment under FASB ASC Subtopic 450-20	257,265			270,004
Loans, net of unearned income, evaluated for impairment under FASB ASC Subtopic 310-10-35	36			17
Loans, net of unearned income	257,301		265,431	270,021
Leasing and other and overdrafts [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses measured for impairment under FASB ASC Subtopic 450-20	1,653			2,011
Allowance for loan losses evaluated for impairment under FASB ASC Section 310-10-35	0			0
Allowance for loan losses	1,653		1,799	2,011		3,370
Loans, net of unearned income, measured for impairment under FASB ASC Subtopic 450-20	124,255			96,009
Loans, net of unearned income, evaluated for impairment under FASB ASC Subtopic 310-10-35	0			0
Loans, net of unearned income	124,255		119,206	96,009
Unallocated [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses measured for impairment under FASB ASC Subtopic 450-20	8,308	[1]		11,803	[1]
Allowance for loan losses	$8,308	[1]	$7,360	$11,803	[1]	$16,208

[1]	The unallocated allowance, which was approximately 5% and 6% of the total allowance for credit losses as of MarchÂ 31, 2015 and MarchÂ 31, 2014, respectively, was, in the opinion of management, reasonable and appropriate given that the estimates used in the allocation process are inherently imprecise.

Loans_and_Allowance_for_Credit7

Loans and Allowance for Credit Losses Total Impaired Loans by Class Segments (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with no related allowance	$75,553	$68,022
Unpaid principal balance, with related allowance	175,241	167,682
Unpaid Principal Balance	250,794	235,704
Recorded investment, with no related allowance	64,426	59,073
Recorded investment, with related allowance	138,429	129,628
Recorded Investment	202,855	188,701
Related Allowance	54,157	60,867
Real-estate commercial mortage [Member]
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with no related allowance	35,586	25,802
Unpaid principal balance, with related allowance	48,636	49,619
Recorded investment, with no related allowance	30,462	23,236
Recorded investment, with related allowance	39,297	40,023
Related Allowance	13,944	16,715
Commercial - Secured [Member]
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with no related allowance	17,832	17,599
Unpaid principal balance, with related allowance	35,825	24,824
Recorded investment, with no related allowance	14,769	14,582
Recorded investment, with related allowance	30,565	19,335
Related Allowance	16,315	12,165
Commercial - unsecured [Member]
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with related allowance	1,417	1,241
Recorded investment, with related allowance	1,260	1,089
Related Allowance	808	865
Real-estate - home equity [Member]
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with related allowance	18,035	19,392
Recorded investment, with related allowance	12,754	13,458
Related Allowance	6,544	9,224
Real-estate - residential mortgage [Member]
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with no related allowance	4,858	4,873
Unpaid principal balance, with related allowance	56,684	56,607
Recorded investment, with no related allowance	4,858	4,873
Recorded investment, with related allowance	47,069	46,478
Related Allowance	14,073	18,592
Construction - commercial residential [Member]
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with no related allowance	16,448	18,041
Unpaid principal balance, with related allowance	13,267	14,007
Recorded investment, with no related allowance	13,643	14,801
Recorded investment, with related allowance	6,590	7,903
Related Allowance	2,169	2,675
Construction - Commercial [Member]
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with no related allowance	829	1,707
Unpaid principal balance, with related allowance	867	1,501
Recorded investment, with no related allowance	694	1,581
Recorded investment, with related allowance	577	1,023
Related Allowance	178	459
Construction other [Member]
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with related allowance	452	452
Recorded investment, with related allowance	281	281
Related Allowance	103	137
Consumer - direct [Member]
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with related allowance	17	19
Recorded investment, with related allowance	17	19
Related Allowance	11	17
Consumer - Indirect [Member]
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with related allowance	41	20
Recorded investment, with related allowance	19	19
Related Allowance	$12	$18

Loans_and_Allowance_for_Credit8

Loans and Allowance for Credit Losses Average Impaired Loans by Class Segment (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	$61,751		$64,769
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	195	[1]	182	[1]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	134,030		136,861
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	502	[1]	520	[1]
Impaired Financing Receivable, Average Recorded Investment	195,781		201,630
Impaired Financing Receivable, Interest Income, Accrual Method	697	[1]	702	[1]
Real-estate commercial mortage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	26,849		23,993
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	91	[1]	86	[1]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	39,660		37,119
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	133	[1]	132	[1]
Commercial - Secured [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	14,676		21,125
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	21	[1]	35	[1]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	24,950		23,045
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	36	[1]	38	[1]
Commercial - unsecured [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	1,175		845
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	1	[1]	1	[1]
Real-estate - home equity [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	0		300
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	0	[1]	0	[1]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	13,106		14,096
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	31	[1]	20	[1]
Real-estate - residential mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	4,866		159
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	28	[1]	1	[1]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	46,774		51,231
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	273	[1]	294	[1]
Construction - Commercial Residential [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	14,222		17,223
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	55	[1]	60	[1]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	7,247		9,771
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	28	[1]	35	[1]
Construction - Commercial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	1,138		1,969
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	0	[1]	0	[1]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	800		193
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	0	[1]	0	[1]
Construction other [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	281		546
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	0	[1]	0	[1]
Consumer - direct [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	18		13
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	0	[1]	0	[1]
Consumer - Indirect [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	19		2
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	$0	[1]	$0	[1]

[1]	All impaired loans, excluding accruing TDRs, were non-accrual loans. Interest income recognized for the three months ended MarchÂ 31, 2015 and 2014 represents amounts earned on accruing TDRs.

Loans_and_Allowance_for_Credit9

Loans and Allowance for Credit Losses Credit Quality Indicators (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$13,115,505	$13,111,716	$12,733,792
Commercial Loans, Commerical Mortgages, Constructions Loans [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	9,614,673	9,553,811
Percentage of total loans rated	100.00%	100.00%
Real-estate commercial mortage [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	5,227,101	5,197,155	5,137,454
Commercial - industrial, financial, and agricultural [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	3,762,631	3,725,567	3,574,130
Commercial - Secured [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	3,608,386	3,564,614
Commercial - Unsecured [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	154,245	160,953
Construction, Excluding Contstruction Other [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	624,941	631,089
Construction - Commercial Residential [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	231,533	203,670
Construction - Commercial [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	393,408	427,419
Pass [Member] \| Commercial Loans, Commerical Mortgages, Constructions Loans [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	8,958,766	8,924,922
Percentage of total loans rated	93.20%	93.40%
Pass [Member] \| Real-estate commercial mortage [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	4,919,760	4,899,016
Pass [Member] \| Commercial - industrial, financial, and agricultural [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	3,487,042	3,480,166
Pass [Member] \| Commercial - Secured [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	3,344,506	3,333,486
Pass [Member] \| Commercial - Unsecured [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	142,536	146,680
Pass [Member] \| Construction, Excluding Contstruction Other [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	551,964	545,740
Pass [Member] \| Construction - Commercial Residential [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	173,833	136,109
Pass [Member] \| Construction - Commercial [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	378,131	409,631
Special Mention [Member] \| Commercial Loans, Commerical Mortgages, Constructions Loans [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	311,163	295,046
Percentage of total loans rated	3.20%	3.10%
Special Mention [Member] \| Real-estate commercial mortage [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	123,644	127,302
Special Mention [Member] \| Commercial - industrial, financial, and agricultural [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	155,055	128,047
Special Mention [Member] \| Commercial - Secured [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	151,724	120,584
Special Mention [Member] \| Commercial - Unsecured [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	3,331	7,463
Special Mention [Member] \| Construction, Excluding Contstruction Other [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	32,464	39,697
Special Mention [Member] \| Construction - Commercial Residential [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	20,662	27,495
Special Mention [Member] \| Construction - Commercial [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	11,802	12,202
Substandard [Member] \| Commercial Loans, Commerical Mortgages, Constructions Loans [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	344,744	333,843
Percentage of total loans rated	3.60%	3.50%
Substandard [Member] \| Real-estate commercial mortage [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	183,697	170,837
Substandard [Member] \| Commercial - industrial, financial, and agricultural [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	120,534	117,354
Substandard [Member] \| Commercial - Secured [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	112,156	110,544
Substandard [Member] \| Commercial - Unsecured [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	8,378	6,810
Substandard [Member] \| Construction, Excluding Contstruction Other [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	40,513	45,652
Substandard [Member] \| Construction - Commercial Residential [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	37,038	40,066
Substandard [Member] \| Construction - Commercial [Member]
Internal risk ratings for loans by segment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$3,475	$5,586

Recovered_Sheet1

Loans and Allowance for Credit Losses Summary of Delinquency and Non-Performing Status by Portfolio Segment (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014		Mar. 31, 2014
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	13,115,505		$13,111,716		$12,733,792
Real-estate - home equity [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	1,701,623		1,736,688		1,740,496
Real-estate - residential mortgage [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	1,364,788		1,377,068		1,331,465
Construction other [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	52,865		59,512
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	257,301		265,431		270,021
Consumer - direct [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	103,268		109,323
Consumer - Indirect [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	154,033		156,108
Leasing and other and overdrafts [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	124,255		119,206		96,009
Real Estate, Home Equity, Construction, Other, Consumer and Leasing [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	3,500,832		3,557,905
Commercial Loans, Commerical Mortgages, Constructions Loans [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	9,614,673		9,553,811
Loans And Leases Receivable Percentage Of Loans Within Delinquecy Category By Total Non Risk Rated Loans	100.00%		100.00%
Performing Financing Receivable [Member] \| Real-estate - home equity [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	1,674,544		1,711,017
Performing Financing Receivable [Member] \| Real-estate - residential mortgage [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	1,312,299		1,321,139
Performing Financing Receivable [Member] \| Construction other [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	52,119		59,180
Performing Financing Receivable [Member] \| Consumer [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	250,245		257,376
Performing Financing Receivable [Member] \| Consumer - direct [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	97,959		104,018
Performing Financing Receivable [Member] \| Consumer - Indirect [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	152,286		153,358
Performing Financing Receivable [Member] \| Leasing and other and overdrafts [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	122,255		118,550
Performing Financing Receivable [Member] \| Real Estate, Home Equity, Construction, Other, Consumer and Leasing [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	3,411,462		3,467,262
Performing Financing Receivable [Member] \| Commercial Loans, Commerical Mortgages, Constructions Loans [Member]
Financing Receivable, Impaired [Line Items]
Loans And Leases Receivable Percentage Of Loans Within Delinquecy Category By Total Non Risk Rated Loans	97.50%		97.50%
Delinquent [Member] \| Real-estate - home equity [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	12,624	[1]	10,931	[1]
Delinquent [Member] \| Real-estate - residential mortgage [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	23,894	[1]	26,934	[1]
Delinquent [Member] \| Construction other [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	417	[1]	0	[1]
Delinquent [Member] \| Consumer [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	4,572	[1]	5,465	[1]
Delinquent [Member] \| Consumer - direct [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	2,919	[1]	2,891	[1]
Delinquent [Member] \| Consumer - Indirect [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	1,653	[1]	2,574	[1]
Delinquent [Member] \| Leasing and other and overdrafts [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	1,976	[1]	523	[1]
Delinquent [Member] \| Real Estate, Home Equity, Construction, Other, Consumer and Leasing [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	43,483	[1]	43,853	[1]
Delinquent [Member] \| Commercial Loans, Commerical Mortgages, Constructions Loans [Member]
Financing Receivable, Impaired [Line Items]
Loans And Leases Receivable Percentage Of Loans Within Delinquecy Category By Total Non Risk Rated Loans	1.20%	[1]	1.20%	[1]
Nonperforming Financing Receivable [Member]
Financing Receivable, Impaired [Line Items]
Days past due	90
Nonperforming Financing Receivable [Member] \| Real-estate - home equity [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	14,455	[2]	14,740	[2]
Nonperforming Financing Receivable [Member] \| Real-estate - residential mortgage [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	28,595	[2]	28,995	[2]
Nonperforming Financing Receivable [Member] \| Construction other [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	329	[2]	332	[2]
Nonperforming Financing Receivable [Member] \| Consumer [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	2,484	[2]	2,590	[2]
Nonperforming Financing Receivable [Member] \| Consumer - direct [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	2,390	[2]	2,414	[2]
Nonperforming Financing Receivable [Member] \| Consumer - Indirect [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	94	[2]	176	[2]
Nonperforming Financing Receivable [Member] \| Leasing and other and overdrafts [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	24	[2]	133	[2]
Nonperforming Financing Receivable [Member] \| Real Estate, Home Equity, Construction, Other, Consumer and Leasing [Member]
Financing Receivable, Impaired [Line Items]
Loans, net of unearned income	45,887	[2]	$46,790	[2]
Nonperforming Financing Receivable [Member] \| Commercial Loans, Commerical Mortgages, Constructions Loans [Member]
Financing Receivable, Impaired [Line Items]
Loans And Leases Receivable Percentage Of Loans Within Delinquecy Category By Total Non Risk Rated Loans	1.30%	[2]	1.30%	[2]
Minimum [Member] \| Delinquent [Member]
Financing Receivable, Impaired [Line Items]
Days past due	31
Maximum [Member] \| Delinquent [Member]
Financing Receivable, Impaired [Line Items]
Days past due	89

[1]	)Includes all accruing loans 31 days to 89 days past due
[2]	Includes all accruing loans 90 days or more past due and all non-accrual loans.

Recovered_Sheet2

Loans and Allowance for Credit Losses Non-Performing Assets (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Receivables [Abstract]
Non-accrual loans	$129,929	$121,080
Accruing loans greater than 90 days past due	19,365	17,402
Total non-performing loans	149,294	138,482
Other real estate owned (OREO)	14,251	12,022
Total non-performing assets	$163,545	$150,504

Recovered_Sheet3

Loans and Allowance for Credit Losses Loans Modified Under Troubled Debt Restructurings (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Modifications [Line Items]
Accruing TDRs	$72,926	$67,621
Non-accrual TDRs	29,392	24,616	[1]
Total TDRs	102,318	92,237
Real-estate - residential mortgage [Member]
Financing Receivable, Modifications [Line Items]
Accruing TDRs	31,574	31,308
Real-estate commercial mortage [Member]
Financing Receivable, Modifications [Line Items]
Accruing TDRs	23,468	18,822
Construction - Commercial Residential [Member]
Financing Receivable, Modifications [Line Items]
Accruing TDRs	7,791	9,241
Commercial - Secured [Member]
Financing Receivable, Modifications [Line Items]
Accruing TDRs	6,786	5,170
Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Accruing TDRs	3,084	2,975
Commercial - unsecured [Member]
Financing Receivable, Modifications [Line Items]
Accruing TDRs	189	67
Consumer - direct [Member]
Financing Receivable, Modifications [Line Items]
Accruing TDRs	17	19
Consumer Other Financing Receivable [Member]
Financing Receivable, Modifications [Line Items]
Accruing TDRs	$17	$19

[1]	Included within non-accrual loans in the preceding table detailing non-performing assets.

Recovered_Sheet4

Loans and Allowance for Credit Losses Troubled Debt Restructuring Modification (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
	loans	loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	28	31
Financing Receivable, Modifications, Post-Modification Recorded Investment	$11,317	$9,258
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	25	31
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	12,477	4,710
Real-estate commercial mortage [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	3	7
Financing Receivable, Modifications, Post-Modification Recorded Investment	2,495	7,470
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	2	3
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	1,659	126
Real-estate - residential mortgage [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	4	6
Financing Receivable, Modifications, Post-Modification Recorded Investment	610	706
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	8	12
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	748	2,522
Construction - commercial residential [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	1	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	889	548
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	1	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	1,366	619
Real-estate - home equity [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	10	10
Financing Receivable, Modifications, Post-Modification Recorded Investment	492	529
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	7	14
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	816	1,432
Commercial - Secured [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	8	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	6,776	0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	7	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	7,888	11
Commercial - unsecured [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	42	0
Consumer - direct [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	0	4
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	4
Consumer - Indirect [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	1	3
Financing Receivable, Modifications, Post-Modification Recorded Investment	$13	$1

Recovered_Sheet5

Loans and Allowance for Credit Losses Past Due Loan Status and Non-Accrual Loans by Portfolio Segment (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	$63,180	$51,177
60-89 Days Past Due	18,109	17,169
>90 Days Past Due and Accruing	19,365	17,402
Non-accrual	129,929	121,080
Total >90 Days	149,294	138,482
Total Past Due	230,583	206,828
Current	12,884,922	12,904,888
Loans, net of unearned income	13,115,505	13,111,716	12,733,792
Real-estate commercial mortage [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	20,528	14,399
60-89 Days Past Due	5,620	3,677
>90 Days Past Due and Accruing	40	800
Non-accrual	46,291	44,437
Total >90 Days	46,331	45,237
Total Past Due	72,479	63,313
Current	5,154,622	5,133,842
Loans, net of unearned income	5,227,101	5,197,155	5,137,454
Commercial - industrial, financial, and agricultural [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	8,888	5,234
60-89 Days Past Due	1,060	1,023
>90 Days Past Due and Accruing	3,646	619
Non-accrual	39,619	29,769
Total >90 Days	43,265	30,388
Total Past Due	53,213	36,645
Current	3,709,418	3,688,922
Loans, net of unearned income	3,762,631	3,725,567	3,574,130
Commercial - Secured [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	8,056	4,839
60-89 Days Past Due	1,002	958
>90 Days Past Due and Accruing	3,646	610
Non-accrual	38,548	28,747
Total >90 Days	42,194	29,357
Total Past Due	51,252	35,154
Current	3,557,134	3,529,460
Loans, net of unearned income	3,608,386	3,564,614
Commercial - unsecured [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	832	395
60-89 Days Past Due	58	65
>90 Days Past Due and Accruing	0	9
Non-accrual	1,071	1,022
Total >90 Days	1,071	1,031
Total Past Due	1,961	1,491
Current	152,284	159,462
Loans, net of unearned income	154,245	160,953
Real-estate - construction [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	1,976	160
60-89 Days Past Due	151	0
>90 Days Past Due and Accruing	146	51
Non-accrual	13,994	16,348
Total >90 Days	14,140	16,399
Total Past Due	16,267	16,559
Current	661,539	674,042
Loans, net of unearned income	677,806	690,601	584,217
Real-estate - home equity [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	10,347	8,048
60-89 Days Past Due	2,277	2,883
>90 Days Past Due and Accruing	4,785	4,257
Non-accrual	9,670	10,483
Total >90 Days	14,455	14,740
Total Past Due	27,079	25,671
Current	1,674,544	1,711,017
Loans, net of unearned income	1,701,623	1,736,688	1,740,496
Real-estate - residential mortgage [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	16,375	18,789
60-89 Days Past Due	7,519	8,145
>90 Days Past Due and Accruing	8,242	8,952
Non-accrual	20,353	20,043
Total >90 Days	28,595	28,995
Total Past Due	52,489	55,929
Current	1,312,299	1,321,139
Loans, net of unearned income	1,364,788	1,377,068	1,331,465
Construction - Commercial Residential [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	1,559	160
60-89 Days Past Due	151	0
>90 Days Past Due and Accruing	98	0
Non-accrual	12,442	13,463
Total >90 Days	12,540	13,463
Total Past Due	14,250	13,623
Current	217,283	190,047
Loans, net of unearned income	231,533	203,670
Construction - Commercial [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	0	0
60-89 Days Past Due	0	0
>90 Days Past Due and Accruing	0	0
Non-accrual	1,271	2,604
Total >90 Days	1,271	2,604
Total Past Due	1,271	2,604
Current	392,137	424,815
Loans, net of unearned income	393,408	427,419
Construction other [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	417	0
60-89 Days Past Due	0	0
>90 Days Past Due and Accruing	48	51
Non-accrual	281	281
Total >90 Days	329	332
Total Past Due	746	332
Current	52,119	59,180
Loans, net of unearned income	52,865	59,512
Consumer [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	3,400	4,190
60-89 Days Past Due	1,172	1,275
>90 Days Past Due and Accruing	2,482	2,590
Non-accrual	2	0
Total >90 Days	2,484	2,590
Total Past Due	7,056	8,055
Current	250,245	257,376
Loans, net of unearned income	257,301	265,431	270,021
Consumer - direct [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	1,978	2,034
60-89 Days Past Due	941	857
>90 Days Past Due and Accruing	2,390	2,414
Non-accrual	0	0
Total >90 Days	2,390	2,414
Total Past Due	5,309	5,305
Current	97,959	104,018
Loans, net of unearned income	103,268	109,323
Consumer - Indirect [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	1,422	2,156
60-89 Days Past Due	231	418
>90 Days Past Due and Accruing	92	176
Non-accrual	2	0
Total >90 Days	94	176
Total Past Due	1,747	2,750
Current	152,286	153,358
Loans, net of unearned income	154,033	156,108
Leasing and other and overdrafts [Member]
Financial Receivable, Recorded investment, Past Due [Line Items]
31-59 Days Past Due	1,666	357
60-89 Days Past Due	310	166
>90 Days Past Due and Accruing	24	133
Non-accrual	0	0
Total >90 Days	24	133
Total Past Due	2,000	656
Current	122,255	118,550
Loans, net of unearned income	$124,255	$119,206	$96,009

Recovered_Sheet6

Loans and Allowance for Credit Losses Narrative (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for Loan and Lease Losses	($3,700,000)	$2,500,000
Allowance for Loan and Lease Losses, Period Increase (Decrease)	6,200,000
Allowance for Loan and Lease Losses Write-offs, Net	2,600,000	8,400,000
Change in allowance for loan loss allocation on impaired loans	9,700,000
Precent change in provision for impaired loan losses	15.20%
Impaired loans with principal balances approximately in percentage	78.00%	79.00%
Loan to value ratio in the Corporation's policy	70.00%
Recorded investment, with no related allowance	64,426,000		59,073,000
TDR additional commitments to lend	7,100,000		3,900,000
Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum balance of loans evaluated individually for impairment	1,000,000
Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum balance of loans evaluated individually for impairment	1,000,000
Impaired loans balances, real estate as collateral	$1,000,000

Mortgage_Servicing_Rights_Summ

Mortgage Servicing Rights Summary of Changes in Mortgage Servicing Rights (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Amortized Cost:
Servicing Asset at Fair Value, Amount	$43,600,000
Mortgages [Member]
Amortized Cost:
Valuation Allowance for Impairment of Recognized Servicing Assets, Period Increase (Decrease)	0
Residential Mortgage [Member]
Amortized Cost:
Balance at beginning of period	42,148,000	42,452,000
Originations of mortgage servicing rights	1,557,000	1,115,000
Amortization	-1,902,000	-1,899,000
Balance at end of period	$41,803,000	$41,668,000

StockBased_Compensation_Compen

Stock-Based Compensation Compensation Expense and Related Tax Benefits (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based compensation expense	$1,071	$1,033
Tax benefit	-292	-263
Stock-based compensation expense, net of tax	$779	$770

StockBased_Compensation_Narrat

Stock-Based Compensation Narrative (Details)	3 Months Ended
Stock-Based Compensation Narrative (Details)	Mar. 31, 2015
Statement [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Options Expiration Term	10 years
Directors' Plan [Member]
Statement [Line Items]
Shares reserved for future grants under the stock option and compensation plan	410,000
Employee Stock Option [Member]
Statement [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 1	3 years
Shares reserved for future grants under the stock option and compensation plan	11,500,000
Performance Shares [Member]
Statement [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	403,000
Restricted Stock Units (RSUs) [Member]
Statement [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	139,500

Employee_Benefit_Plans_Summary

Employee Benefit Plans Summary of Pension Plan and Postretirement Plan Net Periodic Benefit Cost (Details) (USD $)	0 Months Ended	3 Months Ended
	Feb. 01, 2014	Mar. 31, 2015		Mar. 31, 2014
Pension Plan [Member]
Define Benefit Plan Disclosure [Line Items]
Service cost		$145,000	[1]	$92,000	[1]
Interest cost		851,000		853,000
Expected return on plan assets		-752,000		-811,000
Net amortization and deferral		782,000		244,000
Net periodic benefit cost		1,026,000		378,000
Postretirement Plan [Member]
Define Benefit Plan Disclosure [Line Items]
Service cost		0	[2]	15,000	[2]
Interest cost		52,000		61,000
Net accretion and deferral		-65,000		-95,000
Net periodic benefit cost		-13,000		-19,000
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments	1,500,000
Defined Benefit Plan, Curtailments		$3,400,000

[1]	The Pension Plan service cost recorded for the three months ended MarchÂ 31, 2015 and 2014 was related to administrative costs associated with the plan and was not due to the accrual of additional participant benefits.
[2]	As a result of the plan amendment, additional participant benefits are not accrued under the Postretirement Plan after February 1, 2014.

Derivative_Financial_Instrumen2

Derivative Financial Instruments Notional Amounts and Fair Values of Derivative Financial Instruments (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Derivative [Line Items]
Foreign Currency Open Position	$500,000
Derivative, Fair Value, Net	2,079	160
Interest Rate Lock Commitments [Member]
Derivative [Line Items]
Asset (Liability) Fair Value	2,507	1,385
Interest Rate Lock Commitments [Member] \| Positive Fair Values [Member]
Derivative [Line Items]
Derivative, Notional Amount	151,389	89,655
Asset, Fair Value	2,509	1,391
Interest Rate Lock Commitments [Member] \| Negative Fair Values [Member]
Derivative [Line Items]
Derivative, Notional Amount	187	301
Liability, Fair Value	-2	-6
Forward Commitments [Member] \| Negative Fair Values [Member]
Derivative [Line Items]
Derivative, Notional Amount	144,370	93,802
Liability, Fair Value	-610	-1,164
Interest Rate Swap with Customer [Member]
Derivative [Line Items]
Asset (Liability) Fair Value	28,922	19,518
Interest Rate Swap with Customer [Member] \| Positive Fair Values [Member]
Derivative [Line Items]
Derivative, Notional Amount	535,786	468,080
Asset, Fair Value	29,035	19,716
Interest Rate Swap with Customer [Member] \| Negative Fair Values [Member]
Derivative [Line Items]
Derivative, Notional Amount	8,000	25,418
Liability, Fair Value	-113	-198
Interest Rate Swap with Counterparty [Member]
Derivative [Line Items]
Asset (Liability) Fair Value	-28,922	-19,518
Interest Rate Swap with Counterparty [Member] \| Positive Fair Values [Member]
Derivative [Line Items]
Derivative, Notional Amount	8,000	25,418
Asset, Fair Value	113	198
Interest Rate Swap with Counterparty [Member] \| Negative Fair Values [Member]
Derivative [Line Items]
Derivative, Notional Amount	535,786	468,080
Liability, Fair Value	-29,035	-19,716
Foreign Exchange Contracts With Customer [Member]
Derivative [Line Items]
Derivative, Fair Value, Net	936	369
Foreign Exchange Contracts With Customer [Member] \| Positive Fair Values [Member]
Derivative [Line Items]
Derivative, Notional Amount	12,642	11,616
Foreign Currency Contract, Asset, Fair Value Disclosure	1,411	810
Foreign Exchange Contracts With Customer [Member] \| Negative Fair Values [Member]
Derivative [Line Items]
Derivative, Notional Amount	7,033	5,250
Foreign Currency Contracts, Liability, Fair Value Disclosure	-475	-441
Foreign Exchange Contracts With Correspondent Banks [Member]
Derivative [Line Items]
Derivative, Fair Value, Net	-754	-430
Foreign Exchange Contracts With Correspondent Banks [Member] \| Positive Fair Values [Member]
Derivative [Line Items]
Derivative, Notional Amount	8,053	5,287
Foreign Currency Contract, Asset, Fair Value Disclosure	952	446
Foreign Exchange Contracts With Correspondent Banks [Member] \| Negative Fair Values [Member]
Derivative [Line Items]
Derivative, Notional Amount	14,825	13,572
Foreign Currency Contracts, Liability, Fair Value Disclosure	($1,706)	($876)

Derivative_Financial_Instrumen3

Derivative Financial Instruments Fair Value Gains and Losses on Derivative Financial Instruments (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Mortgage Banking Income [Member] \| Interest rate lock with customers [Member]
Derivative [Line Items]
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments	$1,122	$389
Mortgage Banking Income [Member] \| Forward Commitments [Member]
Derivative [Line Items]
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments	554	-1,498
Other Income [Member]
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	1,919	-1,185
Other Income [Member] \| Interest Rate Swap with Customer [Member]
Derivative [Line Items]
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments	9,404	4,205
Other Income [Member] \| Interest Rate Swap with Counterparty [Member]
Derivative [Line Items]
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments	-9,404	-4,205
Other Income [Member] \| Foreign Exchange Contracts With Customer [Member]
Derivative [Line Items]
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net	567	192
Other Income [Member] \| Foreign Exchange Contracts With Correspondent Banks [Member]
Derivative [Line Items]
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net	($324)	($268)

Fair_Value_Option_Summary_of_C

Fair Value Option Summary of Corporation's Mortgage Loans Held for Sale (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans Held-for-sale, Mortgages	$34,124		$17,522
Mortgage Loans Held For Sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gain (loss) in fair values of mortgage loans held for sale	261	297
Mortgage Loans Held For Sale [Member] \| Cost [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans Held-for-sale, Mortgages	33,421		17,080
Mortgage Loans Held For Sale [Member] \| Fair Value [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans Held-for-sale, Mortgages	$34,124		$17,522

Balance_Sheet_Offsetting_Detai

Balance Sheet Offsetting (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Offsetting Assets [Line Items]
Gross Amounts Recognized on the Consolidated Balance Sheets	$30,100		$20,360
Gross Amounts Not Offset on the Consolidated Balance Sheets, Financial Instruments	-1,065	[1]	-652	[1]
Gross Amounts Not Offset on the Consolidated Balance Sheets, Cash Collateral	0		0
Net Amount	29,035		19,708
Offsetting Liabilities [Line Items]
Gross Amounts Recognized on the Consolidated Balance Sheets	30,854		20,790
Gross Amounts Not Offset on the Consolidated Balance Sheets, Financial Instruments	-1,065	[1]	-652	[1]
Gross Amounts Not Offset on the Consolidated Balance Sheets, Cash Collateral	-29,010		-19,520
Net Amount	779		618
Foreign Exchange Contract [Member]
Offsetting Assets [Line Items]
Gross Amounts Recognized on the Consolidated Balance Sheets	952		446
Gross Amounts Not Offset on the Consolidated Balance Sheets, Financial Instruments	-952	[1]	-446	[1]
Gross Amounts Not Offset on the Consolidated Balance Sheets, Cash Collateral	0
Net Amount	0
Offsetting Liabilities [Line Items]
Gross Amounts Recognized on the Consolidated Balance Sheets	1,706		876
Gross Amounts Not Offset on the Consolidated Balance Sheets, Financial Instruments	-952	[1]	-446	[1]
Gross Amounts Not Offset on the Consolidated Balance Sheets, Cash Collateral	-940		-310
Net Amount	-186		120
Interest Rate Swap [Member]
Offsetting Assets [Line Items]
Gross Amounts Recognized on the Consolidated Balance Sheets	29,148		19,914
Gross Amounts Not Offset on the Consolidated Balance Sheets, Financial Instruments	-113	[1]	-206	[1]
Gross Amounts Not Offset on the Consolidated Balance Sheets, Cash Collateral	0		0
Net Amount	29,035		19,708
Offsetting Liabilities [Line Items]
Gross Amounts Recognized on the Consolidated Balance Sheets	29,148		19,914
Gross Amounts Not Offset on the Consolidated Balance Sheets, Financial Instruments	-113	[1]	-206	[1]
Gross Amounts Not Offset on the Consolidated Balance Sheets, Cash Collateral	-28,070		-19,210
Net Amount	$965		$498

[1]	For interest rate swap and foreign exchange derivative assets, amounts represent any derivative liability fair values that could be offset in the event of counterparty or customer default. For interest rate swap and foreign exchange derivative liabilities, amounts represent any derivative asset fair values that could be offset in the event of counterparty or customer default.

Commitments_and_Contingencies_1

Commitments and Contingencies Outstanding Commitments to Extend Credit and Letters of Credit (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Residential Mortgage Principal Balance Repurchase Request Received	$803,000	$917,000
Residential Mortgage Principal Balance FHLB Credit Enhancement	148,000,000
Residential Mortgage Repurchase Reserves FHLB Credit Enhancement	2,200,000	2,300,000
Commitments to Extend Credit [Member] \| Reserve for Off-balance Sheet Activities [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Valuation allowances and Reserves, Balance	4,575,869,000	4,389,064,000
Standby Letters of Credit [Member] \| Reserve for Off-balance Sheet Activities [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Valuation allowances and Reserves, Balance	379,947,000	382,465,000
Commercial Letters of Credit [Member] \| Reserve for Off-balance Sheet Activities [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Valuation allowances and Reserves, Balance	36,049,000	32,304,000
Residential Mortgage [Member] \| Reserve for Off-balance Sheet Activities [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Valuation allowances and Reserves, Balance	$3,000,000	$3,200,000

Fair_Value_Measurements_Assets

Fair Value Measurements Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	$2,259,802	$2,323,371
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	34,124	17,522
Available-for-sale Securities, Fair Value Disclosure	2,259,802	2,323,371
Other Assets, Fair Value Disclosure	50,855	38,987
Assets, Fair Value Disclosure	2,344,781	2,379,880
Liabilities, Fair Value Disclosure	48,769	38,821
Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	40,608	47,623
Equity Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	40,608	47,623
U.S. Government Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure		200
U.S. Government Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure		200
U.S. Government-Sponsored Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	203	214
U.S. Government-Sponsored Agency Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	203	214
State and Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	224,342	245,215
State and Municipal Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	224,342	245,215
Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	97,682	98,034
Corporate Debt Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	97,682	98,034
Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	867,876	902,313
Collateralized Mortgage Obligations [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	867,876	902,313
Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	930,159	928,831
Mortgage-Backed Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	930,159	928,831
Auction Rate Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	98,932	100,941
Auction Rate Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	98,932	100,941
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	0	0
Available-for-sale Securities, Fair Value Disclosure	40,608	47,623
Other Assets, Fair Value Disclosure	19,198	17,682
Assets, Fair Value Disclosure	59,806	65,305
Liabilities, Fair Value Disclosure	19,009	17,737
Fair Value, Inputs, Level 1 [Member] \| Equity Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	40,608	47,623
Fair Value, Inputs, Level 1 [Member] \| U.S. Government Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure		0
Fair Value, Inputs, Level 1 [Member] \| U.S. Government-Sponsored Agency Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member] \| State and Municipal Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member] \| Corporate Debt Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member] \| Collateralized Mortgage Obligations [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member] \| Mortgage-Backed Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member] \| Auction Rate Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	34,124	17,522
Available-for-sale Securities, Fair Value Disclosure	2,115,358	2,166,899
Other Assets, Fair Value Disclosure	31,657	21,305
Assets, Fair Value Disclosure	2,181,139	2,205,726
Liabilities, Fair Value Disclosure	29,760	21,084
Fair Value, Inputs, Level 2 [Member] \| Equity Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member] \| U.S. Government Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure		200
Fair Value, Inputs, Level 2 [Member] \| U.S. Government-Sponsored Agency Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	203	214
Fair Value, Inputs, Level 2 [Member] \| State and Municipal Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	224,342	245,215
Fair Value, Inputs, Level 2 [Member] \| Corporate Debt Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	92,778	90,126
Fair Value, Inputs, Level 2 [Member] \| Collateralized Mortgage Obligations [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	867,876	902,313
Fair Value, Inputs, Level 2 [Member] \| Mortgage-Backed Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	930,159	928,831
Fair Value, Inputs, Level 2 [Member] \| Auction Rate Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	0	0
Available-for-sale Securities, Fair Value Disclosure	103,836	108,849
Other Assets, Fair Value Disclosure	0	0
Assets, Fair Value Disclosure	103,836	108,849
Liabilities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member] \| Equity Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member] \| U.S. Government Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure		0
Fair Value, Inputs, Level 3 [Member] \| U.S. Government-Sponsored Agency Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member] \| State and Municipal Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member] \| Corporate Debt Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	4,904	7,908
Fair Value, Inputs, Level 3 [Member] \| Collateralized Mortgage Obligations [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member] \| Mortgage-Backed Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member] \| Auction Rate Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	$98,932	$100,941

Fair_Value_Measurements_Change

Fair Value Measurements Changes in Assets and Liabilities Measured at Fair Value on a Recurring Basis Using Level 3 Inputs (Details) (Fair Value, Measurements, Recurring [Member], Fair Value, Inputs, Level 3 [Member], USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Pooled Trust Preferred Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	$4,088		$5,306
Sales	-3,079		0
Unrealized adjustment to fair value	190	[1]	521	[1]
Settlements - calls	-117		-172
(Premium amortization) discount accretion	2	[2]	4	[2]
Balance, end of period	1,084		5,659
Single-issuer Trust Preferred Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	3,820		3,781
Sales	0		0
Unrealized adjustment to fair value	-2	[1]	38	[1]
Settlements - calls	0		0
(Premium amortization) discount accretion	2	[2]	1	[2]
Balance, end of period	3,820		3,820
Auction Rate Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	100,941		159,274
Sales	0		-11,912
Unrealized adjustment to fair value	332	[1]	124	[1]
Settlements - calls	-2,446		0
(Premium amortization) discount accretion	105	[2]	227	[2]
Balance, end of period	$98,932		$147,713

[1]	Pooled trust preferred securities, single-issuer trust preferred securities and ARCs are classified as available for sale investment securities; as such, the unrealized adjustment to fair value was recorded as an unrealized holding gain (loss) and included as a component of available for sale investment securities on the consolidated balance sheets.
[2]	Included as a component of net interest income on the consolidated statements of income.

Fair_Value_Measurements_Assets1

Fair Value Measurements Assets Measured at Fair Value on a Nonrecurring Basis (Details) (Fair Value, Measurements, Nonrecurring [Member], USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans	$148,698	$127,834
Other financial assets	56,054	54,170
Assets, Fair Value Disclosure	204,752	182,004
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans	0	0
Other financial assets	0	0
Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans	0	0
Other financial assets	0	0
Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans	148,698	127,834
Other financial assets	56,054	54,170
Assets, Fair Value Disclosure	$204,752	$182,004

Fair_Value_Measurements_Detail

Fair Value Measurements Details of Book Value and Fair Value of Financial Instruments (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Fair Value, Balance Sheet Grouping, FinancialStatement Captions[Line Items]
Available for sale investment securities	$2,259,802		$2,323,371
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, FinancialStatement Captions[Line Items]
Cash and Cash Equivalents	91,870		105,702
Interest-Rate Deposits with Other Banks	637,973		358,130
Investment in Federal Home Loan Bank Stock, Fair Value Disclosure	65,694		64,953
Loans Held-for-sale	34,124	[1]	17,522	[1]
Available for sale investment securities	2,259,802	[1]	2,323,371	[1]
Loans, net of unearned income	13,115,505	[1]	13,111,716	[1]
Accrued Interest Receivable	42,216		41,818
Other Financial Assets	178,496	[1]	169,764	[1]
Demand and Savings Deposit Liabilities, Fair Value Disclosure	10,467,077		10,296,055
Time Deposit Liabilities, Fair Value Disclosure	3,047,420		3,071,451
Short-term borrowings	410,105		329,719
Accrued interest payable	18,357		18,045
Other Financial Liabilities	193,924	[1]	172,786	[1]
Federal Home Loan Bank Advances And Debt Long Term, Fair Value Disclosre	1,094,517		1,139,413
Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, FinancialStatement Captions[Line Items]
Cash and Cash Equivalents	91,870		105,702
Interest-Rate Deposits with Other Banks	637,973		358,130
Investment in Federal Home Loan Bank Stock, Fair Value Disclosure	65,694		64,953
Loans Held-for-sale	34,124	[1]	17,522	[1]
Available for sale investment securities	2,259,802	[1]	2,323,371	[1]
Loans, net of unearned income	13,078,115	[1]	13,030,543	[1]
Accrued Interest Receivable	42,216		41,818
Other Financial Assets	178,496	[1]	169,764	[1]
Demand and Savings Deposit Liabilities, Fair Value Disclosure	10,467,077		10,296,055
Time Deposit Liabilities, Fair Value Disclosure	3,058,030		3,069,883
Short-term borrowings	410,105		329,719
Accrued interest payable	18,357		18,045
Other Financial Liabilities	193,924	[1]	172,786	[1]
Federal Home Loan Bank Advances And Debt Long Term, Fair Value Disclosre	$1,104,738		$1,142,980

[1]	These financial instruments, or certain financial instruments within these categories, are measured at fair value on the Corporationâ€™s consolidated balance sheets. Descriptions of the fair value determinations for these financial instruments are disclosed above.

Fair_Value_Measurements_Narrat

Fair Value Measurements Narrative (Details) (USD $)	3 Months Ended
Fair Value Measurements Narrative (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Equity Securities, Value Test Coverage, Percent	80.00%
Fair Value, Equity Securities, Fair Value Price Difference Threshold, Percent	5.00%
Corporate debt securities	$2,219,194,000
Significant Input, Assumed Market Return to Liquidity, Years	5 years
Other real estate owned (OREO)	14,251,000	12,022,000
Short Term Borrowings, Reprice Period, In Days	90
Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Prepayment Speed	12.60%
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Discount Rate	9.60%
Equity Securities Financial Institution [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Equity Securities	34,700,000	41,800,000
Other Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Equity Securities	5,900,000	5,800,000
Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Corporate debt securities	97,682,000	98,034,000
Single-issuer Trust Preferred Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Corporate debt securities	42,863,000	42,016,000
Pooled Trust Preferred Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Corporate debt securities	1,084,000	4,088,000
Fair Value, Measurements, Recurring [Member] \| Single-issuer Trust Preferred Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Corporate debt securities	42,900,000	42,000,000
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member] \| Equity Securities Financial Institution [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Equity Securities	34,700,000	41,800,000
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member] \| Other Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Equity Securities	5,900,000	5,800,000
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| Financial Institutions Subordinated Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Corporate debt securities	50,200,000	50,000,000
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| Single-issuer Trust Preferred Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Corporate debt securities	39,000,000	38,200,000
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| Other Corporate Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Corporate debt securities	3,600,000	1,900,000
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member] \| Single-issuer Trust Preferred Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Corporate debt securities	3,800,000	3,800,000
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member] \| Pooled Trust Preferred Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Corporate debt securities	1,100,000	4,100,000
Fair Value, Measurements, Nonrecurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned (OREO)	14,300,000	12,000,000
Servicing Asset at Amortized Value, Fair Value	41,800,000	42,100,000
Trust for Benefit of Employees [Member] \| Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other financial assets	16,800,000	16,400,000
Foreign Exchange Contract [Member] \| Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other financial assets	2,400,000	1,300,000
Forward Contracts [Member] \| Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other financial assets	2,500,000	1,400,000
Other financial liabilities	612,000	1,200,000
Interest Rate Swap [Member] \| Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other financial assets	29,100,000	19,900,000
Other financial liabilities	29,100,000	19,900,000
Foreign Exchange Contract [Member] \| Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other financial liabilities	2,200,000	1,300,000
Trust for Benefit of Employees [Member] \| Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other financial liabilities	$16,800,000	$16,400,000

Subsequent_Events_Details

Subsequent Events (Details) (USD $)	1 Months Ended	3 Months Ended		1 Months Ended	6 Months Ended
Share data in Thousands, except Per Share data, unless otherwise specified	Nov. 30, 2014	Mar. 31, 2015	Mar. 31, 2014	Apr. 30, 2015	Apr. 30, 2015
Subsequent Event [Line Items]
Stock repurchase program, authorized amount	$100,000,000
Payments for repurchase of common stock	100,000,000	0	49,804,000
Acquisition of treasury stock (in shares)	-6,500
Share repurchase plan, percent of common shares outstanding, expected to be delivered	80.00%
Subsequent Event [Member]
Subsequent Event [Line Items]
Repayments of debt				100,000,000
Debt instrument, interest rate, effective percentage				5.49%	5.49%
Stock repurchase program, authorized amount				$50,000,000	$50,000,000
Acquisition of treasury stock (in shares)				-1,800	-8,300
Treasury stock aquired, average cost per share				$12.05
Stock repurchase program, Number of shares authorized to be repurchased, percent of shares outstanding				2.30%