Fulton Financial (FULT) 10-Q 12 May 14 2014 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2014	Apr. 30, 2014
Document and Entity Information	'	'
Entity Registrant Name	'FULTON FINANCIAL CORP	'
Entity Central Index Key	'0000700564	'
Trading Symbol	'fult	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Document Type	'10-Q	'
Document Period End Date	31-Mar-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q1	'
Amendment Flag	'false	'
Entity Common Stock, Shares Outstanding	'	188,969,000

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
ASSETS	'	'
Cash and due from banks	$260,389	$218,540
Interest-bearing deposits with other banks	225,428	163,988
Restricted Investments	81,634	84,173
Loans held for sale	24,417	21,351
Investment securities:	'	'
Available-for-sale Securities	2,501,198	2,568,434
Loans, net of unearned income	12,733,792	12,782,220
Less: Allowance for loan losses	-197,089	-202,780
Net Loans	12,536,703	12,579,440
Premises and equipment	225,647	226,021
Accrued interest receivable	43,376	44,037
Goodwill	532,747	533,076
Other assets	480,350	495,574
Total Assets	16,911,889	16,934,634
LIABILITIES	'	'
Noninterest-bearing	3,359,900	3,283,172
Interest-bearing	9,310,017	9,208,014
Total Deposits	12,669,917	12,491,186
Short-term borrowings:	'	'
Federal funds purchased	361,098	582,436
Other short-term borrowings	708,586	676,193
Total Short-Term Borrowings	1,069,684	1,258,629
Accrued interest payable	16,972	15,218
Other liabilities	213,136	222,830
Federal Home Loan Bank advances and long-term debt	883,461	883,584
Total Liabilities	14,853,170	14,871,447
SHAREHOLDERS' EQUITY	'	'
Common stock, $2.50 par value, 600 million shares authorized, 217.9 million shares issued in 2014 and 217.8 million shares issued in 2013	544,821	544,568
Additional paid-in capital	1,434,546	1,432,974
Retained earnings	490,517	463,843
Accumulated Other Comprehensive Income	-21,889	-37,341
Treasury stock, at cost, 29.1 million shares in 2014 and 25.2 million shares in 2013	-389,276	-340,857
Total Shareholders' Equity	2,058,719	2,063,187
Total Liabilities and Shareholders' Equity	$16,911,889	$16,934,634

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
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	217,900,000	217,800,000
Treasury stock, shares	29,100,000	25,200,000

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
INTEREST INCOME	'	'
Loans, including fees	$131,830	$134,130
Investment securities:	'	'
Taxable	13,266	13,397
Tax-exempt	2,348	2,481
Dividends	332	390
Loans held for sale	134	495
Other interest income	882	429
Total Interest Income	148,792	151,322
INTEREST EXPENSE	'	'
Deposits	7,896	10,401
Short-term borrowings	633	509
Long-term debt	10,698	10,768
Total Interest Expense	19,227	21,678
Net Interest Income	129,565	129,644
Provision for credit losses	2,500	15,000
Net Interest Income After Provision for Credit Losses	127,065	114,644
NON-INTEREST INCOME	'	'
Service charges on deposit accounts	11,711	14,111
Investment management and trust services	10,958	10,096
Other service charges and fees	8,927	8,510
Mortgage banking income	3,605	8,173
Other	3,305	3,896
Investment securities gains, net	0	2,473
Total Non-Interest Income	38,506	47,259
NON-INTEREST EXPENSE	'	'
Salaries and employee benefits	59,566	61,212
Net occupancy expense	13,603	11,844
Other outside services	3,812	2,860
Data processing	3,796	3,903
Equipment expense	3,602	3,908
Professional Fees	2,904	3,047
Operating risk loss	1,828	1,766
Software	2,925	2,748
FDIC insurance expense	2,689	2,847
Marketing	1,584	1,872
Other real estate owned and repossession expense	983	2,854
Intangible amortization	315	534
Other	11,947	11,541
Total Non-Interest Expense	109,554	110,936
Income Before Income Taxes	56,017	50,967
Income taxes	14,234	11,740
Net Income	$41,783	$39,227
PER SHARE:	'	'
Net Income (Basic)	$0.22	$0.20
Net Income (Diluted)	$0.22	$0.20
Cash Dividends	$0.08	$0.08

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Net Income	$41,783	$39,227
Other Comprehensive Income (Loss), Net of Tax [Abstract]	'	'
Unrealized gain (loss) on securities	13,933	125
Reclassification adjustment for securities (gains) losses included in net income	-944	-1,608
Non-credit related unrealized gain (loss) on other-than-temporarily impaired debt securities	189	1,083
Unrealized gain on derivative financial instruments	34	34
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	2,144	0
Amortization (accretion) of net unrecognized pension and postretirement plan items	96	328
Other Comprehensive Income (Loss)	15,452	-38
Total Comprehensive Income	$57,235	$39,189

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
Beginning Balance at Dec. 31, 2012	$2,081,656	$542,093	$1,426,267	$363,937	$5,675	($256,316)
Beginning Balance (in shares) at Dec. 31, 2012	'	199,225	'	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'
Net Income	39,227	'	'	39,227	'	'
Other Comprehensive Income (Loss)	-38	'	'	'	-38	'
Stock issued, including related tax benefits	2,735	393	196	'	'	2,146
Stock issued, including related tax benefits (in shares)	'	297	'	'	'	'
Stock-based compensation awards	847	'	847	'	'	'
Acquisition of treasury stock (in shares)	'	-4,246	'	'	'	'
Acquisition of treasury stock	-47,046	'	'	'	'	-47,046
Common stock cash dividends	-15,618	'	'	-15,618	'	'
Ending Balance at Mar. 31, 2013	2,061,763	542,486	1,427,310	387,546	5,637	-301,216
Ending Balance (in shares) at Mar. 31, 2013	'	195,276	'	'	'	'
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 (Loss)	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	'	'	'	'

Consolidated_Statements_of_Sha1

Consolidated Statements of Shareholders' Equity (Parenthetical) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Statement of Stockholders' Equity [Abstract]	'	'
Cash dividends per share	$0.08	$0.08

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:	'	'
Net Income	$41,783	$39,227
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Provision for credit losses	2,500	15,000
Depreciation and amortization of premises and equipment	6,629	6,171
Net amortization of investment securities premiums	1,435	3,846
Investment securities gains, net	0	-2,473
Net (increase) decrease in loans held for sale	-3,066	4,854
Amortization of intangible assets	315	534
Stock-based compensation	1,033	847
Excess tax benefit from share-based compensation	-25	-88
Decrease in accrued interest receivable	661	-1,699
Decrease in other assets	7,271	7,074
Decrease in accrued interest payable	1,754	2,063
Decrease in other liabilities	182	-11,713
Total adjustments	18,689	24,416
Net cash provided by operating activities	60,472	63,643
CASH FLOWS FROM INVESTING ACTIVITIES:	'	'
Proceeds from sales of securities available for sale	12,548	56,896
Proceeds from maturities of securities held to maturity	0	35
Proceeds from maturities of securities available for sale	79,045	199,910
Purchase of securities available for sale	-11,700	-334,660
Decrease in short-term investments	-58,901	73,275
Net increase in loans	40,017	-249,229
Net purchases of premises and equipment	-6,255	-5,202
Net cash used in investing activities	54,754	-258,975
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'
Net increase in demand and savings deposits	94,093	19,339
Net decrease in time deposits	84,638	-115,042
Decrease in short-term borrowings	-188,945	258,567
Repayments of long-term debt	-123	-5,042
Net proceeds from issuance of stock	2,152	2,647
Excess tax benefit from share-based compensation	25	88
Dividends paid	-15,413	0
Acquisition of treasury stock	-49,804	-47,046
Net cash used in financing activities	-73,377	113,511
Net (Decrease) Increase in Cash and Due From Banks	41,849	-81,821
Cash and Due From Banks at Beginning of Period	218,540	256,300
Cash and Due From Banks at End of Period	260,389	174,479
Cash paid during the period for:	'	'
Interest	17,473	19,615
Income taxes	$631	$5,086

Basis_of_Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2014
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. Operating results for the three months ended March 31, 2014 are not necessarily indicative of the results that may be expected for the year ending December 31, 2014. The Corporation evaluates subsequent events through the filing date of this Form 10-Q with the Securities and Exchange Commission (SEC).

Net_Income_Per_Share

Net Income Per Share	3 Months Ended
	Mar. 31, 2014
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 and restricted stock.
	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
		2014	2013
		(in thousands)
	Weighted average shares outstanding (basic)	189,467	196,299
	Effect of dilutive securities	1,022	918
	Weighted average shares outstanding (diluted)	190,489	197,217
	For the three months ended March 31, 2014 and March 31, 2013, 3.1 million and 3.7 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, 2014
Accumulated Other Comprehensive Income [Abstract]	'
Accumulated Other Comprehensive Income	'
	Accumulated Other Comprehensive Income (Loss)
	The following table presents changes in other comprehensive income (loss):
		Before-Tax Amount			Tax Effect			Net of Tax Amount
		(in thousands)
	Three months ended March 31, 2014
	Unrealized gain (loss) on securities	$	21,435		$	(7,502	)	$	13,933
	Reclassification adjustment for postretirement gains included in net income (1)	(1,452		)	508			(944		)
	Non-credit related unrealized gains (losses) 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 (1)	149			(53		)	96
	Total Other Comprehensive Income (Loss)	$	23,766		$	(8,314	)	$	15,452
	Three months ended March 31, 2013
	Unrealized gain (loss) on securities	$	192		$	(67	)	$	125
	Reclassification adjustment for securities gains included in net income (2)	(2,473		)	865			(1,608		)
	Non-credit related unrealized gains (losses) on other-than-temporarily impaired debt securities	1,666			(583		)	1,083
	Unrealized gain on derivative financial instruments	54			(20		)	34
	Amortization of net unrecognized pension and postretirement items (1)	505			(177		)	328
	Total Other Comprehensive Income (Loss)	$	(56	)	$	18		$	(38	)
	-1	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 H, "Employee Benefit Plans," for additional details.
	-2	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 D, "Investment Securities," for additional details.
	The following table presents changes in each component of accumulated other comprehensive income (loss), 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, 2014
	Balance at December 31, 2013	$	(27,510	)	$	1,652		$	(2,682	)	$	(8,801	)	$	(37,341	)
	Other comprehensive income (loss) 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	)
	Three months ended March 31, 2013
	Balance at December 31, 2012	$	26,361		$	613		$	(2,818	)	$	(18,481	)	$	5,675
	Other comprehensive income (loss) before reclassifications	125			1,083			—			—			1,208
	Amounts reclassified from accumulated other comprehensive income (loss)	(1,608		)	—			34			328			(1,246		)
	Balance at March 31, 2013	$	24,878		$	1,696		$	(2,784	)	$	(18,153	)	$	5,637

Investment_Securities

Investment Securities	3 Months Ended
	Mar. 31, 2014
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-14
	Equity securities	$	34,231		$	11,524		$	(21	)	$	45,734
	U.S. Government securities	526			—			—			526
	U.S. Government sponsored agency securities	275			6			(1		)	280
	State and municipal securities	278,019			7,190			(1,756		)	283,453
	Corporate debt securities	100,348			6,292			(6,088		)	100,552
	Collateralized mortgage obligations	1,031,968			7,638			(32,869		)	1,006,737
	Mortgage-backed securities	914,502			13,582			(11,881		)	916,203
	Auction rate securities	159,379			2			(11,668		)	147,713
		$	2,519,248		$	46,234		$	(64,284	)	$	2,501,198
		Amortized			Gross			Gross			Estimated
		Cost			Unrealized			Unrealized			Fair
					Gains			Losses			Value
		(in thousands)
	31-Dec-13
	Equity securities	$	33,922		$	12,355		$	(76	)	$	46,201
	U.S. Government securities	525			—			—			525
	U.S. Government sponsored agency securities	720			7			(1		)	726
	State and municipal securities	281,810			6,483			(3,444		)	284,849
	Corporate debt securities	100,468			5,685			(7,404		)	98,749
	Collateralized mortgage obligations	1,069,138			8,036			(44,776		)	1,032,398
	Mortgage-backed securities	949,328			13,881			(17,497		)	945,712
	Auction rate securities	172,299			234			(13,259		)	159,274
		$	2,608,210		$	46,681		$	(86,457	)	$	2,568,434
	Securities carried at $1.8 billion as of March 31, 2014 and $1.7 billion as of December 31, 2013 were pledged as collateral to secure public and trust deposits and customer repurchase agreements.
	Equity securities include common stocks of financial institutions ($39.8 million at March 31, 2014 and $40.6 million at December 31, 2013) and other equity investments ($5.9 million at March 31, 2014 and $5.6 million at December 31, 2013).
	As of March 31, 2014, the financial institutions stock portfolio had a cost basis of $28.5 million and a fair value of $39.8 million, including an investment in a single financial institution with a cost basis of $20.0 million and a fair value of $27.9 million. The fair value of this investment accounted for 70.1% of the 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 fair value.
	The amortized cost and estimated fair values of debt securities as of March 31, 2014, 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		$	30,424		$	30,517
	Due from one year to five years		67,544			71,350
	Due from five years to ten years		199,377			203,240
	Due after ten years		241,202			227,417
			538,547			532,524
	Mortgage-backed securities		914,502			916,203
	Collateralized mortgage obligations		1,031,968			1,006,737
			$	2,485,017		$	2,455,464
	There were no losses recognized for the other-than-temporary impairment of investments during the three months ended March 31, 2014 and 2013. 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
		Realized			Realized
		Gains			Losses
	Three months ended March 31, 2014	(in thousands)
	Equity securities	$	1		$	—		$	1
	Debt securities	322			(323		)	(1		)
	Total	$	323		$	(323	)	$	—
	Three months ended March 31, 2013
	Equity securities	$	1,139		$	—		$	1,139
	Debt securities	1,334			—			1,334
	Total	$	2,473		$	—		$	2,473
	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, 2014 and 2013:
		Three months ended March 31
		2014			2013
		(in thousands)
	Balance of cumulative credit losses on debt securities, beginning of period	$	(20,691	)	$	(23,079	)
	Reductions for increases in cash flows expected to be collected that are recognized over the remaining life of the security	4			—
Balance of cumulative credit losses on debt securities, end of period	$	(20,687	)	$	(23,079	)
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, 2014:
	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)
U.S. Government sponsored agency securities	$	—		$	—		$	50		$	(1	)	$	50	$	(1	)
State and municipal securities	50,286			(1,510		)	3,996			(246		)	54,282		(1,756		)
Corporate debt securities	3,939			(58		)	38,804			(6,030		)	42,743		(6,088		)
Collateralized mortgage obligations	416,584			(13,921		)	313,758			(18,948		)	730,342		(32,869		)
Mortgage-backed securities	621,165			(11,881		)	—			—			621,165		(11,881		)
Auction rate securities	—			—			147,619			(11,668		)	147,619		(11,668		)
Total debt securities	1,091,974			(27,370		)	504,227			(36,893		)	1,596,201		(64,263		)
Equity securities	3			(1		)	118			(20		)	121		(21		)
	$	1,091,977		$	(27,371	)	$	504,345		$	(36,913	)	$	1,596,322	$	(64,284	)
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, 2014.
The unrealized holding losses on auction rate securities, or auction rate certificates (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, 2014, approximately $143 million, or 97%, of the ARCs were rated above investment grade, with approximately $6 million, or 4%, AAA rated and $103 million, or 70%, AA rated. Approximately $4 million, or 3%, of ARCs were either not rated or rated below investment grade by at least one ratings agency. Of this amount, approximately $3 million, or 59%, of the student loans underlying these ARCs have principal payments which are guaranteed by the federal government. In total, approximately $146 million, or 99%, of the student loans underlying the ARCs have principal payments that are guaranteed by the federal government.
During the first quarter of 2014, the Corporation sold ARCs with a total book value of $11.9 million, with no gain or loss upon sale. As of March 31, 2014, all ARCs were current and making scheduled interest payments. Based on management’s evaluations, ARCs with a fair value of $147.7 million were not subject to any other-than-temporary impairment charges as of March 31, 2014. 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, 2014 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, 2014						December 31, 2013
	Amortized			Estimated			Amortized			Estimated
	cost			fair value			cost			fair value
	(in thousands)
Single-issuer trust preferred securities	$	47,502		$	41,879		$	47,481		$	40,531
Subordinated debt	47,436			50,429			47,405			50,327
Pooled trust preferred securities	2,825			5,659			2,997			5,306
Corporate debt securities issued by financial institutions	97,763			97,967			97,883			96,164
Other corporate debt securities	2,585			2,585			2,585			2,585
Available for sale corporate debt securities	$	100,348		$	100,552		$	100,468		$	98,749
The Corporation’s investments in single-issuer trust preferred securities had an unrealized loss of $5.6 million at March 31, 2014. The Corporation did not record any other-than-temporary impairment charges for single-issuer trust preferred securities during the three months ended March 31, 2014 or 2013. Six of the Corporation's 22 single-issuer trust preferred securities were rated below investment grade by at least one ratings agency, with an amortized cost of $13.5 million and an estimated fair value of $11.7 million at March 31, 2014. 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, 2014 were not rated by any ratings agency.
As of March 31, 2014, all eight of the Corporation's pooled trust preferred securities, with an amortized cost of $2.8 million and an estimated fair value of $5.7 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 $100.6 million were not subject to any additional other-than-temporary impairment charges as of March 31, 2014. 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, 2014
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:
		31-Mar-14				31-Dec-13
		(in thousands)
	Real-estate - commercial mortgage	$	5,137,454			$	5,101,922
	Commercial - industrial, financial and agricultural	3,574,130				3,628,420
	Real-estate - home equity	1,740,496				1,764,197
	Real-estate - residential mortgage	1,331,465				1,337,380
	Real-estate - construction	584,217				573,672
	Consumer	270,021				283,124
	Leasing and other	103,192				99,256
	Overdrafts	3,034				4,045
	Loans, gross of unearned income	12,744,009				12,792,016
	Unearned income	(10,217		)		(9,796		)
	Loans, net of unearned income	$	12,733,792			$	12,782,220
	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 Financial Accounting Standards Board’s (FASB) Accounting Standards Codification (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. For commercial loans, class segments 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,
		2014				2013
		(in thousands)
	Allowance for loan losses	$	197,089			$	202,780
	Reserve for unfunded lending commitments	1,917				2,137
	Allowance for credit losses	$	199,006			$	204,917
	The following table presents the activity in the allowance for credit losses:
		Three months ended March 31
		2014				2013
		(in thousands)
	Balance at beginning of period	$	204,917			$	225,439
	Loans charged off	(10,268		)		(22,106		)
	Recoveries of loans previously charged off	1,857				3,194
	Net loans charged off	(8,411		)		(18,912		)
	Provision for credit losses	2,500				15,000
	Balance at end of period	$	199,006			$	221,527
	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, 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
	Three months ended March 31, 2013
	Balance at December 31, 2012	$	62,928			$	60,205		$	22,776		$	34,536		$	17,287		$	2,367		$	2,752		$	21,052		$	223,903
	Loans charged off	(4,133		)		(9,502		)	(2,404		)	(3,050		)	(1,986		)	(550		)	(481		)	—			(22,106		)
	Recoveries of loans previously charged off	1,064				379			331			81			671			506			162			—			3,194
	Net loans charged off	(3,069		)		(9,123		)	(2,073		)	(2,969		)	(1,315		)	(44		)	(319		)	—			(18,912		)
	Provision for loan losses (1)	4,126				5,590			2,998			1,917			32			(37		)	354			70			15,050
	Balance at March 31, 2013	$	63,985			$	56,672		$	23,701		$	33,484		$	16,004		$	2,286		$	2,787		$	21,122		$	220,041
	-1	The provision for loan losses excluded a $220,000 decrease in the reserve for unfunded lending commitments for the three months ended March 31, 2014 and excluded a $50,000 decrease in the reserve for unfunded lending commitments for the three months ended March 31, 2013. The total provision for credit losses, comprised of allocations for both funded and unfunded loans, was $2.5 million for the three months ended March 31, 2014 and $15.0 million for the three months ended March 31, 2013.
	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, 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
Allowance for loan losses at March 31, 2013
Measured for impairment under FASB ASC Subtopic 450-20	$	40,920			$	38,988		$	14,947		$	10,075		$	8,838		$	2,271		$	2,758		$	21,122		$	139,919
Evaluated for impairment under FASB ASC Section 310-10-35	23,065				17,684			8,754			23,409			7,166			15			29			N/A			80,122
	$	63,985			$	56,672		$	23,701		$	33,484		$	16,004		$	2,286		$	2,787		$	21,122		$	220,041
Loans, net of unearned income at March 31, 2013
Measured for impairment under FASB ASC Subtopic 450-20	$	4,646,355			$	3,591,753		$	1,675,577		$	1,247,976		$	554,757		$	309,120		$	89,195		N/A			$	12,114,733
Evaluated for impairment under FASB ASC Section 310-10-35	83,575				66,730			13,869			55,478			42,840			18			45			N/A			262,555
	$	4,729,930			$	3,658,483		$	1,689,446		$	1,303,454		$	597,597		$	309,138		$	89,240		N/A			$	12,377,288
-1	The unallocated allowance, which was approximately 6% and 10% of the total allowance for credit losses as of March 31, 2014 and March 31, 2013, 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.
In March 2013, the Corporation sold $9.9 million of non-accrual commercial mortgage, commercial and construction loans to an investor, resulting in a total increase to charge-offs of $5.2 million during the three months ended March 31, 2013, as detailed in the following table.
	Real Estate - Commercial mortgage				Commercial - industrial, financial and agricultural			Real Estate - Construction			Total
	(in thousands)
Unpaid principal balance of loans sold	$	7,690			$	4,730		$	740		$	13,160
Charge-offs prior to sale	(2,420		)		(710		)	(150		)	(3,280		)
Net recorded investment in loans sold	5,270				4,020			590			9,880
Proceeds from sale, net of selling expenses	2,770				1,730			140			4,640
Total charge-off upon sale	$	(2,500	)		$	(2,290	)	$	(450	)	$	(5,240	)
Existing allocation for credit losses on sold loans	$	(2,870	)		$	(1,960	)	$	(300	)	$	(5,130	)
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 $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. All loans evaluated for impairment under FASB ASC Section 310-10-35 are measured for losses on a quarterly basis. As of March 31, 2014 and December 31, 2013, substantially all of the Corporation’s individually evaluated impaired loans with total outstanding balances greater than $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, 2014 and 2013, approximately 79% and 73%, respectively, of impaired loans with principal balances greater than $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 certified appraisals are not obtained for loans to commercial borrowers 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, 2014										December 31, 2013
	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	$	27,433			$	23,491		$	—		$	28,892		$	24,494		$	—
Commercial - secured	23,862				20,867			—			23,890			21,383			—
Real estate - home equity	399				300			—			399			300			—
Real estate - residential mortgage	317				317			—			—			—			—
Construction - commercial residential	26,475				20,705			—			18,943			13,740			—
Construction - commercial	2,992				1,962			—			2,996			1,976			—
	81,478				67,642						75,120			61,893
With a related allowance recorded:
Real estate - commercial mortgage	47,010				38,407			16,394			43,282			35,830			14,444
Commercial - secured	36,309				23,765			13,232			34,267			22,324			13,315
Commercial - unsecured	693				641			472			1,113			1,048			752
Real estate - home equity	19,420				13,854			9,491			20,383			14,337			9,059
Real estate - residential mortgage	61,733				51,365			21,711			63,682			51,097			21,745
Construction - commercial residential	15,753				4,963			2,212			25,769			14,579			3,493
Construction - commercial	481				191			76			485			195			77
Construction - other	718				544			298			719			548			301
Consumer - direct	15				15			13			11			11			10
Consumer - indirect	15				2			2			2			2			2
	182,147				133,747			63,901			189,713			139,971			63,198
Total	$	263,625			$	201,389		$	63,901		$	264,833		$	201,864		$	63,198
As of March 31, 2014 and December 31, 2013, there were $67.6 million and $61.9 million, respectively, of impaired loans that did not have a related allowance for loan loss. The estimated fair values of the collateral for these loans exceeded their carrying amount, or they were previously charged down to 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
	2014							2013
	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	$	23,993			$	86		$	32,140		$	160
Commercial - secured	21,125				35			31,413			34
Commercial - unsecured	—				—			66			—
Real estate - home equity	300				—			205			1
Real estate - residential mortgage	159				1			991			12
Construction - commercial residential	17,223				60			22,650			63
Construction - commercial	1,969				—			4,979			2
	64,769				182			92,444			272
With a related allowance recorded:
Real estate - commercial mortgage	37,119				132			54,464			221
Commercial - secured	23,045				38			35,864			43
Commercial - unsecured	845				1			1,743			2
Real estate - home equity	14,096				20			13,301			16
Real estate - residential mortgage	51,231				294			53,797			339
Construction - commercial residential	9,771				35			11,496			42
Construction - commercial	193				—			2,758			3
Construction - other	546				—			533			1
Consumer - direct	13				—			24			—
Consumer - indirect	2				—			—			—
Leasing and other and overdrafts	—				—			28			—
	136,861				520			174,008			667
Total	$	201,630			$	702		$	266,452		$	939
-1	All impaired loans, excluding accruing TDRs, were non-accrual loans. Interest income recognized for the three months ended March 31, 2014 and 2013 represents amounts earned on accruing TDRs.
Credit Quality Indicators and Non-performing Assets
The following table presents internal credit risk ratings for commercial - secured loans, commercial - unsecured loans, commercial mortgages, construction - commercial residential loans and construction - commercial loans:
	Pass							Special Mention						Substandard or Lower						Total
	March 31, 2014				December 31, 2013			March 31, 2014			December 31, 2013			March 31, 2014			December 31, 2013			March 31, 2014			December 31, 2013
	(dollars in thousands)
Real estate - commercial mortgage	$	4,833,982			$	4,763,987		$	122,929		$	141,013		$	180,543		$	196,922		$	5,137,454		$	5,101,922
Commercial - secured	3,109,539				3,167,168			137,176			111,613			128,326			125,382			3,375,041			3,404,163
Commercial -unsecured	183,734				209,836			10,369			11,666			4,986			2,755			199,089			224,257
Total commercial - industrial, financial and agricultural	3,293,273				3,377,004			147,545			123,279			133,312			128,137			3,574,130			3,628,420
Construction - commercial residential	153,495				146,041			29,556			31,522			46,490			57,806			229,541			235,369
Construction - commercial	274,037				258,441			2,915			2,932			6,144			8,124			283,096			269,497
Total construction (excluding Construction - other)	427,532				404,482			32,471			34,454			52,634			65,930			512,637			504,866
	$	8,554,787			$	8,545,473		$	302,945		$	298,746		$	366,489		$	390,989		$	9,224,221		$	9,235,208
% of Total	92.7		%		92.6		%	3.3		%	3.2		%	4		%	4.2		%	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 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 risk rating process allows management to identify riskier credits in a timely manner and to allocate resources to managing troubled accounts.
The Corporation does not assign internal risk ratings to smaller balance, homogeneous loans, such as home equity, residential mortgage, consumer, leasing and other 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 these loans through the various delinquency status categories is a significant component of the allowance for credit losses methodology, which bases the probability of default on this migration.
The following table presents a summary of delinquency and non-performing status for home equity, residential mortgages, construction loans to individuals and consumer, leasing and other loans by class segment:
	Performing							Delinquent (1)						Non-performing (2)						Total
	March 31, 2014				December 31, 2013			March 31, 2014			December 31, 2013			March 31, 2014			December 31, 2013			March 31, 2014			December 31, 2013
	(dollars in thousands)
Real estate - home equity	$	1,711,430			$	1,731,185		$	11,978		$	16,029		$	17,088		$	16,983		$	1,740,496		$	1,764,197
Real estate - residential mortgage	1,281,854				1,282,754			20,306			23,279			29,305			31,347			1,331,465			1,337,380
Construction - other	70,096				68,258			940			—			544			548			71,580			68,806
Consumer - direct	116,748				126,666			3,634			3,586			2,872			2,391			123,254			132,643
Consumer - indirect	144,220				147,017			2,420			3,312			127			152			146,767			150,481
Total consumer	260,968				273,683			6,054			6,898			2,999			2,543			270,021			283,124
Leasing and other and overdrafts	95,141				92,876			794			581			74			48			96,009			93,505
	$	3,419,489			$	3,448,756		$	40,072		$	46,787		$	50,010		$	51,469		$	3,509,571		$	3,547,012
% of Total	97.4		%		97.2		%	1.2		%	1.3		%	1.4		%	1.5		%	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,
	2014				2013
	(in thousands)
Non-accrual loans	$	133,705			$	133,753
Accruing loans greater than 90 days past due	21,225				20,524
Total non-performing loans	154,930				154,277
Other real estate owned (OREO)	15,300				15,052
Total non-performing assets	$	170,230			$	169,329
The following table presents TDRs, by class segment:
	March 31,				December 31,
	2014				2013
	(in thousands)
Real-estate - residential mortgage	$	30,363			$	28,815
Real-estate - commercial mortgage	19,514				19,758
Construction - commercial residential	8,430				10,117
Commercial - secured	6,674				7,933
Real estate - home equity	2,606				1,365
Commercial - unsecured	81				112
Consumer - direct	15				11
Consumer - indirect	1				—
Total accruing TDRs	67,684				68,111
Non-accrual TDRs (1)	27,487				30,209
Total TDRs	$	95,171			$	98,320
-1	Included within non-accrual loans in the preceding table detailing non-performing assets.
As of March 31, 2014 and December 31, 2013, there were $5.2 million and $9.6 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, 2014 and 2013 that were modified during the three months ended March 31, 2014 and 2013:
	Three months ended March 31
	2014						2013
	Number of Loans		Recorded Investment				Number of Loans	Recorded Investment
	(dollars in thousands)
Real estate - commercial mortgage	7		$	7,470			5	$	2,652
Real estate - residential mortgage	6		706				28	3,966
Construction - commercial residential	1		548				2	628
Real estate - home equity	10		529				17	1,180
Consumer - direct	4		4				—	—
Consumer - indirect	3		1				—	—
Commercial - secured	—		—				5	457
Commercial - unsecured	—		—				1	15
	31		$	9,258			58	$	8,898
The following table presents TDRs, by class segment, as of March 31, 2014 and 2013 that were modified within the previous 12 months and had a post-modification payment default during the three months ended March 31, 2014 and 2013. The Corporation defines a payment default as a single missed payment.
	Three months ended March 31
	2014						2013
	Number of Loans		Recorded Investment				Number of Loans	Recorded Investment
	(dollars in thousands)
Real estate - residential mortgage	12		$	2,522			31	$	5,849
Real estate - home equity	14		1,432				20	1,233
Construction - commercial residential	1		619				4	1,308
Real estate - commercial mortgage	3		126				12	6,893
Commercial - secured	1		11				6	708
Construction - commercial	—		—				1	930
	31		$	4,710			74	$	16,921
The following table presents past due status and non-accrual loans by portfolio segment and class segment:
	31-Mar-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	$	13,290			$	4,633		$	3,492		$	42,384		$	45,876		$	63,799		$	5,073,655		$	5,137,454
Commercial - secured	9,370				1,886			308			37,958			38,266			49,522			3,325,519			3,375,041
Commercial - unsecured	304				275			4			560			564			1,143			197,946			199,089
Total commercial - industrial, financial and agricultural	9,674				2,161			312			38,518			38,830			50,665			3,523,465			3,574,130
Real estate - home equity	9,347				2,631			5,540			11,548			17,088			29,066			1,711,430			1,740,496
Real estate - residential mortgage	14,682				5,624			7,986			21,319			29,305			49,611			1,281,854			1,331,465
Construction - commercial residential	1,352				228			796			17,238			18,034			19,614			209,927			229,541
Construction - commercial	—				—			27			2,153			2,180			2,180			280,916			283,096
Construction - other	940				—			—			544			544			1,484			70,096			71,580
Total real estate - construction	2,292				228			823			19,935			20,758			23,278			560,939			584,217
Consumer - direct	2,495				1,139			2,872			—			2,872			6,506			116,748			123,254
Consumer - indirect	1,960				460			126			1			127			2,547			144,220			146,767
Total consumer	4,455				1,599			2,998			1			2,999			9,053			260,968			270,021
Leasing and other and overdrafts	331				463			74			—			74			868			95,141			96,009
	$	54,071			$	17,339		$	21,225		$	133,705		$	154,930		$	226,340		$	12,507,452		$	12,733,792
	31-Dec-13
	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	$	15,474			$	4,009		$	3,502		$	40,566		$	44,068		$	63,551		$	5,038,371		$	5,101,922
Commercial - secured	8,916				1,365			1,311			35,774			37,085			47,366			3,356,797			3,404,163
Commercial - unsecured	332				125			—			936			936			1,393			222,864			224,257
Total commercial - industrial, financial and agricultural	9,248				1,490			1,311			36,710			38,021			48,759			3,579,661			3,628,420
Real estate - home equity	13,555				2,474			3,711			13,272			16,983			33,012			1,731,185			1,764,197
Real estate - residential mortgage	16,969				6,310			9,065			22,282			31,347			54,626			1,282,754			1,337,380
Construction - commercial residential	—				645			346			18,202			18,548			19,193			216,176			235,369
Construction - commercial	14				—			—			2,171			2,171			2,185			267,312			269,497
Construction - other	—				—			—			548			548			548			68,258			68,806
Total real estate - construction	14				645			346			20,921			21,267			21,926			551,746			573,672
Consumer - direct	2,091				1,495			2,391			—			2,391			5,977			126,666			132,643
Consumer - indirect	2,864				448			150			2			152			3,464			147,017			150,481
Total consumer	4,955				1,943			2,541			2			2,543			9,441			273,683			283,124
Leasing and other and overdrafts	559				22			48			—			48			629			92,876			93,505
	$	60,774			$	16,893		$	20,524		$	133,753		$	154,277		$	231,944		$	12,550,276		$	12,782,220
The following table presents past due status and non-accrual loans by portfolio segment and class segment:
	31-Mar-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	$	13,290			$	4,633		$	3,492		$	42,384		$	45,876		$	63,799		$	5,073,655		$	5,137,454
Commercial - secured	9,370				1,886			308			37,958			38,266			49,522			3,325,519			3,375,041
Commercial - unsecured	304				275			4			560			564			1,143			197,946			199,089
Total commercial - industrial, financial and agricultural	9,674				2,161			312			38,518			38,830			50,665			3,523,465			3,574,130
Real estate - home equity	9,347				2,631			5,540			11,548			17,088			29,066			1,711,430			1,740,496
Real estate - residential mortgage	14,682				5,624			7,986			21,319			29,305			49,611			1,281,854			1,331,465
Construction - commercial residential	1,352				228			796			17,238			18,034			19,614			209,927			229,541
Construction - commercial	—				—			27			2,153			2,180			2,180			280,916			283,096
Construction - other	940				—			—			544			544			1,484			70,096			71,580
Total real estate - construction	2,292				228			823			19,935			20,758			23,278			560,939			584,217
Consumer - direct	2,495				1,139			2,872			—			2,872			6,506			116,748			123,254
Consumer - indirect	1,960				460			126			1			127			2,547			144,220			146,767
Total consumer	4,455				1,599			2,998			1			2,999			9,053			260,968			270,021
Leasing and other and overdrafts	331				463			74			—			74			868			95,141			96,009
	$	54,071			$	17,339		$	21,225		$	133,705		$	154,930		$	226,340		$	12,507,452		$	12,733,792

Mortgage_Servicing_Rights

Mortgage Servicing Rights	3 Months Ended
	Mar. 31, 2014
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
		31-Mar
		2014			2013
		(in thousands)
	Amortized cost:
	Balance at beginning of period	$	42,452		$	39,737
	Originations of mortgage servicing rights	1,115			4,227
	Amortization	(1,899		)	(2,958		)
	Balance at end of period	$	41,668		$	41,006
	Valuation allowance	$	—		$	(3,680	)
	Net MSRs at end of period	$	41,668		37,326
	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.
	As of March 31, 2014, the estimated fair value of MSRs was $48.2 million, which exceeded their book value. Therefore, no increase to the valuation allowance was necessary during the three months ended March 31, 2014.

StockBased_Compensation

Stock-Based Compensation	3 Months Ended
	Mar. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock-Based Compensation	'
	Stock-Based Compensation
	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. The Corporation grants equity awards to employees, consisting of stock options and restricted stock, under its Amended and Restated Equity and Cash Incentive Compensation Plan (Employee Option Plan). In addition, employees may purchase stock under the Corporation’s Employee Stock Purchase Plan.
	The Corporation also grants restricted stock to non-employee members of the board of directors under its 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.
	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
		2014			2013
		(in thousands)
	Stock-based compensation expense	$	1,033		$	847
	Tax benefit	(263		)	(224		)
	Stock-based compensation expense, net of tax	$	770		$	623
	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. The fair value of restricted stock is based on the trading price of the Corporation’s stock on the date of grant. Restricted stock awards earn dividends during the vesting period, which are forfeitable if the awards do not vest. Equity awards issued under the Employee Option Plan have historically been granted annually and become fully vested over or after a three year vesting period. Equity awards under the Directors' Plan generally vest immediately upon grant. Certain events, as defined in the Employee Option Plan and the Directors' Plan, result in the acceleration of the vesting of equity awards. As of March 31, 2014, the Employee Option Plan had 11.0 million shares reserved for future grants through 2023. As of March 31, 2014, the Directors’ Plan had 438,000 shares reserved for future grants through 2021.
	On April 1, 2014, the Corporation granted approximately 389,000 performance based restricted stock units (PSUs), 289,000 stock options and 96,000 restricted stock units (RSUs) under its Employee Option Plan. The fair value of RSUs and a majority of PSUs are based on the trading price of the Corporation's stock on the date of grant. The fair value of certain PSUs are estimated through the use of the Monte Carlo valuation methodology as of the date of grant. RSUs become fully vested over or after a three year vesting period, however, certain events, as defined in the Employee Option Plan, can result in the acceleration of the vesting of RSUs. RSUs and PSUs earn dividends during the vesting period, which are forfeitable if the awards do not vest. The amount of PSUs that vest is variable based on the achievement of Corporate and individual performance measures, as defined in each grantees' award agreement. As such, the fair value of PSUs, which is recognized as compensation expense over the period during which employees are required to provide service in exchange for such awards, may vary, based on the expectations for actual performance relative to defined performance measures.

Employee_Benefit_Plans

Employee Benefit Plans	3 Months Ended
	Mar. 31, 2014
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, as determined by consulting actuaries, consisted of the following components:
		Three months ended
		31-Mar
		2014			2013
		(in thousands)
	Service cost (1)	$	92		$	51
	Interest cost	853			772
	Expected return on plan assets	(811		)	(800		)
	Net amortization and deferral	244			596
	Net periodic benefit cost	$	378		$	619
	-1	The Pension Plan service cost recorded for the three months ended March 31, 2014 and 2013, respectively, 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 in 2014, as determined by consulting actuaries and included as a component of salaries and employee benefits on the consolidated statements of income. The gain resulted from the recognition of the remaining pre-curtailment prior service cost as of December 31, 2013. In addition, this amendment resulted in a $3.3 million decrease in the accumulated postretirement benefit obligation and a corresponding increase in unrecognized prior service cost credits.
	The net periodic benefit cost of the Corporation’s Postretirement Plan as determined by consulting actuaries, consisted of the following components, excluding the impact of the $1.5 million gain:
		Three months ended
		31-Mar
		2014			2013
		(in thousands)
	Service cost	$	15		$	57
	Interest cost	61			81
	Expected return on plan assets	—			—
	Net accretion and deferral	(95		)	(91		)
	Net periodic benefit (income) cost	$	(19	)	$	47
	-1	As a result of the plan amendment, additional participant benefits are not accrued under the Postretirement Plan after February 1, 2014. Service costs recorded after the effective date of the amendment represent administrative costs associated with the plan.
	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, 2014
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 credit risk through its credit approval processes, monitoring procedures and obtaining adequate collateral, when appropriate.
	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 or interest rate locks 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 values within other assets and 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, 2014						December 31, 2013
		Notional			Asset			Notional		Asset
		Amount			(Liability)			Amount		(Liability)
					Fair Value					Fair Value
		(in thousands)
	Interest Rate Locks with Customers
	Positive fair values	$	91,145		$	1,202		$	75,217	$	867
	Negative fair values	1,258			(5		)	11,393		(59		)
	Net interest rate locks with customers				1,197					808
	Forward Commitments
	Positive fair values	4,904			2			87,904		1,263
	Negative fair values	95,750			(242		)	2,373		(5		)
	Net forward commitments				(240		)			1,258
	Interest Rate Swaps with Customers
	Positive fair values	228,588			4,955			111,899		2,105
	Negative fair values	81,163			(1,638		)	105,673		(2,993		)
	Net interest rate swaps with customers				3,317					(888		)
	Interest Rate Swaps with Dealer Counterparties
	Positive fair values	81,163			1,638			105,673		2,993
	Negative fair values	228,588			(4,955		)	111,899		(2,105		)
	Net interest rate swaps with dealer counterparties				(3,317		)			888
	Foreign Exchange Contracts with Customers
	Positive fair values	9,927			56			2,150		24
	Negative fair values	9,965			(183		)	12,775		(343		)
	Net foreign exchange contracts with customers				(127		)			(319		)
	Foreign Exchange Contracts with Correspondent Banks
	Positive fair values	15,036			198			17,348		498
	Negative fair values	4,466			(16		)	5,872		(48		)
	Net foreign exchange contracts with correspondent banks				182					450
	Net derivative fair value asset				$	1,012				$	2,197
	The following table presents a summary of the fair value gains and losses on derivative financial instruments:
		Three months ended
		31-Mar
		2014			2013
		(in thousands)
	Interest rate locks with customers	$	389		$	(2,538	)
	Forward commitments	(1,498		)	428
	Interest rate swaps with customers	4,205			(408		)
	Interest rate swaps with dealer counterparties	(4,205		)	408
	Foreign exchange contracts with customers	192			460
	Foreign exchange contracts with correspondent banks	(268		)	418
	Net fair value losses on derivative financial instruments	$	(1,185	)	$	(1,232	)

Balance_Sheet_Offsetting

Balance Sheet Offsetting	3 Months Ended
	Mar. 31, 2014
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 I, "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.
	Beginning in the first quarter of 2014, 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 interest rate swap agreements in the event of default. For additional details, see Note I, "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, 2014
	Interest rate swap derivative assets	$	6,593	$	(1,830	)	$	—		$	4,763
	Foreign exchange derivative assets with correspondent banks	198		(16		)	—			182
	Total	$	6,791	$	(1,846	)	$	—		$	4,945
	Interest rate swap derivative liabilities	$	6,593	$	(1,830	)	$	(3,870	)	$	893
	Foreign exchange derivative liabilities with correspondent banks	16		(16		)	—			—
	Total	$	6,609	$	(1,846	)	$	(3,870	)	$	893
	December 31, 2013
	Interest rate swap derivative assets	$	5,098	$	(2,104	)	$	—		$	2,994
	Interest rate swap derivative liabilities	$	5,098	$	(2,104	)	$	(730	)	$	2,264
	-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, 2014
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, 2013
		2014
		(in thousands)
	Commitments to extend credit	$	4,258,552	$	4,379,578
	Standby letters of credit	387,424		391,445
	Commercial letters of credit	35,404		36,344
	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 E, "Loans and Allowance for Credit Losses," for additional details.
	Residential Lending
	Residential mortgages are originated and sold by the Corporation and 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, 2014 and December 31, 2013, total outstanding repurchase requests totaled $543,000 and $8.8 million, respectively. During the three months ended March 31, 2014, the Corporation entered into a settlement agreement with a secondary market investor. Under this agreement, the Corporation agreed to pay this investor $4.5 million to settle all outstanding and potential future repurchase requests under a series of specified loan purchase agreements with that secondary market investor. The result of this settlement was a reduction to outstanding repurchase requests of $7.5 million and a reduction to reserves for repurchases of $5.1 million, resulting in a $600,000 reduction of operating risk loss on the consolidated statements of income during the first quarter of 2014.
	From 2000 to 2011, the Corporation sold loans to the Federal Home Loan Bank (FHLB) under its Mortgage Partnership Finance Program (MPF Program). No loans were sold under this program during the three months ended March 31, 2014 or during 2013 or 2012. 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" (FLA) balance, up to specified amounts. The FLA is funded by the FHLB based on a percentage of the outstanding principal balance of loans sold. As of March 31, 2014, the unpaid principal balance of loans sold under the MPF Program was approximately $175 million. As of March 31, 2014 and December 31, 2013, the reserve for estimated credit losses related to loans sold under the MPF Program was $3.2 million and $3.6 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.
	As of March 31, 2014 and December 31, 2013, the total reserve for losses on residential mortgage loans sold was $3.6 million and $8.6 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, 2014 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 in the future.
	Other Contingencies

Fair_Value_Option

Fair Value Option	3 Months Ended
	Mar. 31, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Option	'
	Fair Value Option
	FASB ASC Subtopic 825-10 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 I, "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 recorded 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,
		2014		2013
		(in thousands)
	Cost	$	23,941	$	21,172
	Fair value	24,417		21,351
	During the three months ended March 31, 2014, the Corporation recorded gains related to changes in fair values of mortgage loans held for sale of $297,000 and $699,000, respectively.

Fair_Value_Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2014
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, 2014
		Level 1			Level 2		Level 3			Total
		(in thousands)
	Mortgage loans held for sale	$	—		$	24,417	$	—		$	24,417
	Available for sale investment securities:
	Equity securities	45,734			—		—			45,734
	U.S. Government securities	—			526		—			526
	U.S. Government sponsored agency securities	—			280		—			280
	State and municipal securities	—			283,453		—			283,453
	Corporate debt securities	—			91,073		9,479			100,552
	Collateralized mortgage obligations	—			1,006,737		—			1,006,737
	Mortgage-backed securities	—			916,203		—			916,203
	Auction rate securities	—			—		147,713			147,713
	Total available for sale investments	45,734			2,298,272		157,192			2,501,198
	Other assets	15,943			7,798		—			23,741
	Total assets	$	61,677		$	2,330,487	$	157,192		$	2,549,356
	Other liabilities	$	15,886		$	6,841	$	—		$	22,727
		December 31, 2013
		Level 1			Level 2		Level 3			Total
		(in thousands)
	Mortgage loans held for sale	$	—		$	21,351	$	—		$	21,351
	Available for sale investment securities:
	Equity securities	46,201			—		—			46,201
	U.S. Government securities	—			525		—			525
	U.S. Government sponsored agency securities	—			726		—			726
	State and municipal securities	—			284,849		—			284,849
	Corporate debt securities	—			89,662		9,087			98,749
	Collateralized mortgage obligations	—			1,032,398		—			1,032,398
	Mortgage-backed securities	—			945,712		—			945,712
	Auction rate securities	—			—		159,274			159,274
	Total available for sale investments	46,201			2,353,872		168,361			2,568,434
	Other assets	15,779			7,227		—			23,006
	Total assets	$	61,980		$	2,382,450	$	168,361		$	2,612,791
	Other liabilities	$	15,648		$	5,161	$	—		$	20,809
	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, 2014 and December 31, 2013 were measured based on the price that secondary market investors were offering for loans with similar characteristics.
	•	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 75% 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 stocks of financial institutions ($39.8 million at March 31, 2014 and $40.6 million at December 31, 2013) and other equity investments ($5.9 million at March 31, 2014 and $5.6 million at December 31, 2013). 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 ($50.4 million at March 31, 2014 and $50.3 million at December 31, 2013), single-issuer trust preferred securities issued by financial institutions ($41.9 million at March 31, 2014 and $40.5 million at December 31, 2013), pooled trust preferred securities issued by financial institutions ($5.7 million at March 31, 2014 and $5.3 million at December 31, 2013) and other corporate debt issued by non-financial institutions ($2.6 million at March 31, 2014 and December 31, 2013).
	Level 2 investments include the Corporation’s subordinated debt, other corporate debt issued by non-financial institutions and $38.1 million and $36.7 million of single-issuer trust preferred securities held at March 31, 2014 and December 31, 2013, 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, 2014 and December 31, 2013). 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 ($15.7 million at March 31, 2014 and $15.3 million at December 31, 2013) and the fair value of foreign currency exchange contracts ($257,000 at March 31, 2014 and $522,000 at December 31, 2013). 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 and forward commitments with secondary market investors ($1.2 million at March 31, 2014 and $2.1 million at December 31, 2013) and the fair value of interest rate swaps ($6.6 million at March 31, 2014 and $5.1 million at December 31, 2013). The fair values of the Corporation’s interest rate locks, forward commitments and interest rate swaps represent the amounts that would be required to settle the derivative financial instruments at the balance sheet date. See Note I, "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 ($15.7 million at March 31, 2014 and $15.3 million at December 31, 2013) and the fair value of foreign currency exchange contracts ($199,000 at March 31, 2014 and $391,000 at December 31, 2013). 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 ($247,000 at March 31, 2014 and $64,000 at December 31, 2013) and the fair value of interest rate swaps ($6.6 million at March 31, 2014 and $5.1 million at December 31, 2013). 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, 2014
		Pooled Trust			Single-issuer		ARCs
		Preferred			Trust Preferred
		Securities			Securities
	(in thousands)
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
	Three months ended March 31, 2013
Balance at December 31, 2012	$	6,927		$	3,360	$	149,339
Unrealized adjustment to fair value (1)	1,429			7		5,360
Settlements - calls	—			—		(342		)
Discount accretion (2)	—			3		282
Balance at March 31, 2013	$	8,356		$	3,370	$	154,639
-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 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, 2014
	Level 1			Level 2		Level 3			Total
	(in thousands)
Net loans	$	—		$	—	$	137,488		$	137,488
Other financial assets	—			—		56,968			56,968
Total assets	$	—		$	—	$	194,456		$	194,456
	December 31, 2013
	Level 1			Level 2		Level 3			Total
	(in thousands)
Net loans	$	—		$	—	$	138,666		$	138,666
Other financial assets	—			—		57,504			57,504
Total assets	$	—		$	—	$	196,170		$	196,170
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 E, "Loans and Allowance for Credit Losses," for additional details.
•	Other financial assets – This category includes OREO ($15.3 million at March 31, 2014 and $15.1 million at December 31, 2013) and MSRs ($41.7 million at March 31, 2014 and $42.5 million at December 31, 2013), 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, 2014 valuation were 11.2% and 9.1%, 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, 2014 and December 31, 2013. In addition, a general description of the methods and assumptions used to estimate such fair values is also provided.
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.
	March 31, 2014					December 31, 2013
	Book Value			Estimated		Book Value			Estimated
				Fair Value					Fair Value
	(in thousands)
FINANCIAL ASSETS
Cash and due from banks	$	260,389		$	260,389	$	218,540		$	218,540
Interest-bearing deposits with other banks	225,428			225,428		163,988			163,988
Federal Reserve Bank and Federal Home Loan Bank stock	81,634			81,634		84,173			84,173
Loans held for sale (1)	24,417			24,417		21,351			21,351
Available for sale investment securities (1)	2,501,198			2,501,198		2,568,434			2,568,434
Loans, net of unearned income (1)	12,733,792			12,628,983		12,782,220			12,688,774
Accrued interest receivable	43,376			43,376		44,037			44,037
Other financial assets (1)	149,453			149,453		146,933			146,933
FINANCIAL LIABILITIES
Demand and savings deposits	$	9,667,357		$	9,667,357	$	9,573,264		$	9,573,264
Time deposits	3,002,560			3,011,698		2,917,922			2,927,374
Short-term borrowings	1,069,684			1,069,684		1,258,629			1,258,629
Accrued interest payable	16,972			16,972		15,218			15,218
Other financial liabilities (1)	133,848			133,848		124,440			124,440
FHLB advances and long-term debt	883,461			881,197		883,584			875,984
-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.
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		Short-term borrowings
Accrued interest receivable		Accrued interest payable
Federal Reserve Bank and FHLB stock represent restricted investments and are carried at cost on the consolidated balance sheets.
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.

Common_Stock_Repurchase_Plan

Common Stock Repurchase Plan	3 Months Ended
	Mar. 31, 2014
Common Stock Share Repurchase Plan [Abstract]	'
Common Stock Repurchase Plan	'
	Common Stock Repurchase Plan
	In October 2013, the Corporation announced that its board of directors had approved a share repurchase program pursuant to which the Corporation was authorized to repurchase up to four million shares, or approximately 2.1% of its outstanding shares, through March 2014. During the first quarter of 2014, the Corporation repurchased 4.0 million shares under this repurchase plan at an average cost of $12.45 per share, completing this repurchase program on February 19, 2014.

New_Accounting_Standard_Notes

New Accounting Standard (Notes)	3 Months Ended
	Mar. 31, 2014
New Accounting Standard [Abstract]	'
New Accounting Pronouncements, Policy [Policy Text Block]	'
	NOTE O – New Accounting Standard
	In April 2014, the FASB issued ASC Update 2014-08, "Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity." ASC Update 2014-08 changes the criteria for reporting discontinued operations, including a change in the definition of what constitutes the disposal of a component and additional disclosure requirements. ASC Update 2014-08 is effective for disposals that occur within annual periods beginning after December 15, 2014. For the Corporation, this standards update is effective with its March 31, 2015 quarterly report on Form 10-Q. The adoption of ASC Update 2014-08 is not expected to have an impact on the Corporation's consolidated financial statements.

Reclassifications

Reclassifications	3 Months Ended
	Mar. 31, 2014
Accounting Changes and Error Corrections [Abstract]	'
Reclassifications	'
	Reclassifications
	Certain amounts in the 2013 consolidated financial statements and notes have been reclassified to conform to the 2014 presentation.

Net_Income_Per_Share_Tables

Net Income Per Share (Tables)	3 Months Ended
	Mar. 31, 2014
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
		2014	2013
		(in thousands)
	Weighted average shares outstanding (basic)	189,467	196,299
	Effect of dilutive securities	1,022	918
	Weighted average shares outstanding (diluted)	190,489	197,217

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2014
Accumulated Other Comprehensive Income [Abstract]	'
Changes in other comprehensive income [Table Text Block]	'
	The following table presents changes in other comprehensive income (loss):
		Before-Tax Amount			Tax Effect			Net of Tax Amount
		(in thousands)
	Three months ended March 31, 2014
	Unrealized gain (loss) on securities	$	21,435		$	(7,502	)	$	13,933
	Reclassification adjustment for postretirement gains included in net income (1)	(1,452		)	508			(944		)
	Non-credit related unrealized gains (losses) 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 (1)	149			(53		)	96
	Total Other Comprehensive Income (Loss)	$	23,766		$	(8,314	)	$	15,452
	Three months ended March 31, 2013
	Unrealized gain (loss) on securities	$	192		$	(67	)	$	125
	Reclassification adjustment for securities gains included in net income (2)	(2,473		)	865			(1,608		)
	Non-credit related unrealized gains (losses) on other-than-temporarily impaired debt securities	1,666			(583		)	1,083
	Unrealized gain on derivative financial instruments	54			(20		)	34
	Amortization of net unrecognized pension and postretirement items (1)	505			(177		)	328
	Total Other Comprehensive Income (Loss)	$	(56	)	$	18		$	(38	)
	-1	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 H, "Employee Benefit Plans," for additional details.
	-2	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 D, "Investment Securities," 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 (loss), 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, 2014
	Balance at December 31, 2013	$	(27,510	)	$	1,652		$	(2,682	)	$	(8,801	)	$	(37,341	)
	Other comprehensive income (loss) 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	)
	Three months ended March 31, 2013
	Balance at December 31, 2012	$	26,361		$	613		$	(2,818	)	$	(18,481	)	$	5,675
	Other comprehensive income (loss) before reclassifications	125			1,083			—			—			1,208
	Amounts reclassified from accumulated other comprehensive income (loss)	(1,608		)	—			34			328			(1,246		)
	Balance at March 31, 2013	$	24,878		$	1,696		$	(2,784	)	$	(18,153	)	$	5,637

Investment_Securities_Tables

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2014
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-14
	Equity securities	$	34,231		$	11,524		$	(21	)	$	45,734
	U.S. Government securities	526			—			—			526
	U.S. Government sponsored agency securities	275			6			(1		)	280
	State and municipal securities	278,019			7,190			(1,756		)	283,453
	Corporate debt securities	100,348			6,292			(6,088		)	100,552
	Collateralized mortgage obligations	1,031,968			7,638			(32,869		)	1,006,737
	Mortgage-backed securities	914,502			13,582			(11,881		)	916,203
	Auction rate securities	159,379			2			(11,668		)	147,713
		$	2,519,248		$	46,234		$	(64,284	)	$	2,501,198
		Amortized			Gross			Gross			Estimated
		Cost			Unrealized			Unrealized			Fair
					Gains			Losses			Value
		(in thousands)
	31-Dec-13
	Equity securities	$	33,922		$	12,355		$	(76	)	$	46,201
	U.S. Government securities	525			—			—			525
	U.S. Government sponsored agency securities	720			7			(1		)	726
	State and municipal securities	281,810			6,483			(3,444		)	284,849
	Corporate debt securities	100,468			5,685			(7,404		)	98,749
	Collateralized mortgage obligations	1,069,138			8,036			(44,776		)	1,032,398
	Mortgage-backed securities	949,328			13,881			(17,497		)	945,712
	Auction rate securities	172,299			234			(13,259		)	159,274
		$	2,608,210		$	46,681		$	(86,457	)	$	2,568,434
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, 2014, 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		$	30,424		$	30,517
	Due from one year to five years		67,544			71,350
	Due from five years to ten years		199,377			203,240
	Due after ten years		241,202			227,417
			538,547			532,524
	Mortgage-backed securities		914,502			916,203
	Collateralized mortgage obligations		1,031,968			1,006,737
			$	2,485,017		$	2,455,464
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
		Realized			Realized
		Gains			Losses
	Three months ended March 31, 2014	(in thousands)
	Equity securities	$	1		$	—		$	1
	Debt securities	322			(323		)	(1		)
	Total	$	323		$	(323	)	$	—
	Three months ended March 31, 2013
	Equity securities	$	1,139		$	—		$	1,139
	Debt securities	1,334			—			1,334
	Total	$	2,473		$	—		$	2,473
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, 2014 and 2013:
		Three months ended March 31
		2014			2013
		(in thousands)
	Balance of cumulative credit losses on debt securities, beginning of period	$	(20,691	)	$	(23,079	)
	Reductions for increases in cash flows expected to be collected that are recognized over the remaining life of the security	4			—
	Balance of cumulative credit losses on debt securities, end of period	$	(20,687	)	$	(23,079	)
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, 2014:
		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)
	U.S. Government sponsored agency securities	$	—		$	—		$	50		$	(1	)	$	50	$	(1	)
	State and municipal securities	50,286			(1,510		)	3,996			(246		)	54,282		(1,756		)
	Corporate debt securities	3,939			(58		)	38,804			(6,030		)	42,743		(6,088		)
	Collateralized mortgage obligations	416,584			(13,921		)	313,758			(18,948		)	730,342		(32,869		)
	Mortgage-backed securities	621,165			(11,881		)	—			—			621,165		(11,881		)
	Auction rate securities	—			—			147,619			(11,668		)	147,619		(11,668		)
	Total debt securities	1,091,974			(27,370		)	504,227			(36,893		)	1,596,201		(64,263		)
	Equity securities	3			(1		)	118			(20		)	121		(21		)
		$	1,091,977		$	(27,371	)	$	504,345		$	(36,913	)	$	1,596,322	$	(64,284	)
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, 2014						December 31, 2013
		Amortized			Estimated			Amortized			Estimated
		cost			fair value			cost			fair value
		(in thousands)
	Single-issuer trust preferred securities	$	47,502		$	41,879		$	47,481		$	40,531
	Subordinated debt	47,436			50,429			47,405			50,327
	Pooled trust preferred securities	2,825			5,659			2,997			5,306
	Corporate debt securities issued by financial institutions	97,763			97,967			97,883			96,164
	Other corporate debt securities	2,585			2,585			2,585			2,585
	Available for sale corporate debt securities	$	100,348		$	100,552		$	100,468		$	98,749

Loans_and_Allowance_for_Credit1

Loans and Allowance for Credit Losses (Tables)	3 Months Ended
	Mar. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
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:
		31-Mar-14				31-Dec-13
		(in thousands)
	Real-estate - commercial mortgage	$	5,137,454			$	5,101,922
	Commercial - industrial, financial and agricultural	3,574,130				3,628,420
	Real-estate - home equity	1,740,496				1,764,197
	Real-estate - residential mortgage	1,331,465				1,337,380
	Real-estate - construction	584,217				573,672
	Consumer	270,021				283,124
	Leasing and other	103,192				99,256
	Overdrafts	3,034				4,045
	Loans, gross of unearned income	12,744,009				12,792,016
	Unearned income	(10,217		)		(9,796		)
	Loans, net of unearned income	$	12,733,792			$	12,782,220
	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 Financial Accounting Standards Board’s (FASB) Accounting Standards Codification (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. For commercial loans, class segments 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,
		2014				2013
		(in thousands)
	Allowance for loan losses	$	197,089			$	202,780
	Reserve for unfunded lending commitments	1,917				2,137
	Allowance for credit losses	$	199,006			$	204,917
	The following table presents the activity in the allowance for credit losses:
		Three months ended March 31
		2014				2013
		(in thousands)
	Balance at beginning of period	$	204,917			$	225,439
	Loans charged off	(10,268		)		(22,106		)
	Recoveries of loans previously charged off	1,857				3,194
	Net loans charged off	(8,411		)		(18,912		)
	Provision for credit losses	2,500				15,000
	Balance at end of period	$	199,006			$	221,527
	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, 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
	Three months ended March 31, 2013
	Balance at December 31, 2012	$	62,928			$	60,205		$	22,776		$	34,536		$	17,287		$	2,367		$	2,752		$	21,052		$	223,903
	Loans charged off	(4,133		)		(9,502		)	(2,404		)	(3,050		)	(1,986		)	(550		)	(481		)	—			(22,106		)
	Recoveries of loans previously charged off	1,064				379			331			81			671			506			162			—			3,194
	Net loans charged off	(3,069		)		(9,123		)	(2,073		)	(2,969		)	(1,315		)	(44		)	(319		)	—			(18,912		)
	Provision for loan losses (1)	4,126				5,590			2,998			1,917			32			(37		)	354			70			15,050
	Balance at March 31, 2013	$	63,985			$	56,672		$	23,701		$	33,484		$	16,004		$	2,286		$	2,787		$	21,122		$	220,041
	-1	The provision for loan losses excluded a $220,000 decrease in the reserve for unfunded lending commitments for the three months ended March 31, 2014 and excluded a $50,000 decrease in the reserve for unfunded lending commitments for the three months ended March 31, 2013. The total provision for credit losses, comprised of allocations for both funded and unfunded loans, was $2.5 million for the three months ended March 31, 2014 and $15.0 million for the three months ended March 31, 2013.
	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, 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
Allowance for loan losses at March 31, 2013
Measured for impairment under FASB ASC Subtopic 450-20	$	40,920			$	38,988		$	14,947		$	10,075		$	8,838		$	2,271		$	2,758		$	21,122		$	139,919
Evaluated for impairment under FASB ASC Section 310-10-35	23,065				17,684			8,754			23,409			7,166			15			29			N/A			80,122
	$	63,985			$	56,672		$	23,701		$	33,484		$	16,004		$	2,286		$	2,787		$	21,122		$	220,041
Loans, net of unearned income at March 31, 2013
Measured for impairment under FASB ASC Subtopic 450-20	$	4,646,355			$	3,591,753		$	1,675,577		$	1,247,976		$	554,757		$	309,120		$	89,195		N/A			$	12,114,733
Evaluated for impairment under FASB ASC Section 310-10-35	83,575				66,730			13,869			55,478			42,840			18			45			N/A			262,555
	$	4,729,930			$	3,658,483		$	1,689,446		$	1,303,454		$	597,597		$	309,138		$	89,240		N/A			$	12,377,288
-1	The unallocated allowance, which was approximately 6% and 10% of the total allowance for credit losses as of March 31, 2014 and March 31, 2013, 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.
In March 2013, the Corporation sold $9.9 million of non-accrual commercial mortgage, commercial and construction loans to an investor, resulting in a total increase to charge-offs of $5.2 million during the three months ended March 31, 2013, as detailed in the following table.
	Real Estate - Commercial mortgage				Commercial - industrial, financial and agricultural			Real Estate - Construction			Total
	(in thousands)
Unpaid principal balance of loans sold	$	7,690			$	4,730		$	740		$	13,160
Charge-offs prior to sale	(2,420		)		(710		)	(150		)	(3,280		)
Net recorded investment in loans sold	5,270				4,020			590			9,880
Proceeds from sale, net of selling expenses	2,770				1,730			140			4,640
Total charge-off upon sale	$	(2,500	)		$	(2,290	)	$	(450	)	$	(5,240	)
Existing allocation for credit losses on sold loans	$	(2,870	)		$	(1,960	)	$	(300	)	$	(5,130	)
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 $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. All loans evaluated for impairment under FASB ASC Section 310-10-35 are measured for losses on a quarterly basis. As of March 31, 2014 and December 31, 2013, substantially all of the Corporation’s individually evaluated impaired loans with total outstanding balances greater than $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, 2014 and 2013, approximately 79% and 73%, respectively, of impaired loans with principal balances greater than $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 certified appraisals are not obtained for loans to commercial borrowers 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, 2014										December 31, 2013
	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	$	27,433			$	23,491		$	—		$	28,892		$	24,494		$	—
Commercial - secured	23,862				20,867			—			23,890			21,383			—
Real estate - home equity	399				300			—			399			300			—
Real estate - residential mortgage	317				317			—			—			—			—
Construction - commercial residential	26,475				20,705			—			18,943			13,740			—
Construction - commercial	2,992				1,962			—			2,996			1,976			—
	81,478				67,642						75,120			61,893
With a related allowance recorded:
Real estate - commercial mortgage	47,010				38,407			16,394			43,282			35,830			14,444
Commercial - secured	36,309				23,765			13,232			34,267			22,324			13,315
Commercial - unsecured	693				641			472			1,113			1,048			752
Real estate - home equity	19,420				13,854			9,491			20,383			14,337			9,059
Real estate - residential mortgage	61,733				51,365			21,711			63,682			51,097			21,745
Construction - commercial residential	15,753				4,963			2,212			25,769			14,579			3,493
Construction - commercial	481				191			76			485			195			77
Construction - other	718				544			298			719			548			301
Consumer - direct	15				15			13			11			11			10
Consumer - indirect	15				2			2			2			2			2
	182,147				133,747			63,901			189,713			139,971			63,198
Total	$	263,625			$	201,389		$	63,901		$	264,833		$	201,864		$	63,198
As of March 31, 2014 and December 31, 2013, there were $67.6 million and $61.9 million, respectively, of impaired loans that did not have a related allowance for loan loss. The estimated fair values of the collateral for these loans exceeded their carrying amount, or they were previously charged down to 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
	2014							2013
	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	$	23,993			$	86		$	32,140		$	160
Commercial - secured	21,125				35			31,413			34
Commercial - unsecured	—				—			66			—
Real estate - home equity	300				—			205			1
Real estate - residential mortgage	159				1			991			12
Construction - commercial residential	17,223				60			22,650			63
Construction - commercial	1,969				—			4,979			2
	64,769				182			92,444			272
With a related allowance recorded:
Real estate - commercial mortgage	37,119				132			54,464			221
Commercial - secured	23,045				38			35,864			43
Commercial - unsecured	845				1			1,743			2
Real estate - home equity	14,096				20			13,301			16
Real estate - residential mortgage	51,231				294			53,797			339
Construction - commercial residential	9,771				35			11,496			42
Construction - commercial	193				—			2,758			3
Construction - other	546				—			533			1
Consumer - direct	13				—			24			—
Consumer - indirect	2				—			—			—
Leasing and other and overdrafts	—				—			28			—
	136,861				520			174,008			667
Total	$	201,630			$	702		$	266,452		$	939
-1	All impaired loans, excluding accruing TDRs, were non-accrual loans. Interest income recognized for the three months ended March 31, 2014 and 2013 represents amounts earned on accruing TDRs.
Credit Quality Indicators and Non-performing Assets
The following table presents internal credit risk ratings for commercial - secured loans, commercial - unsecured loans, commercial mortgages, construction - commercial residential loans and construction - commercial loans:
	Pass							Special Mention						Substandard or Lower						Total
	March 31, 2014				December 31, 2013			March 31, 2014			December 31, 2013			March 31, 2014			December 31, 2013			March 31, 2014			December 31, 2013
	(dollars in thousands)
Real estate - commercial mortgage	$	4,833,982			$	4,763,987		$	122,929		$	141,013		$	180,543		$	196,922		$	5,137,454		$	5,101,922
Commercial - secured	3,109,539				3,167,168			137,176			111,613			128,326			125,382			3,375,041			3,404,163
Commercial -unsecured	183,734				209,836			10,369			11,666			4,986			2,755			199,089			224,257
Total commercial - industrial, financial and agricultural	3,293,273				3,377,004			147,545			123,279			133,312			128,137			3,574,130			3,628,420
Construction - commercial residential	153,495				146,041			29,556			31,522			46,490			57,806			229,541			235,369
Construction - commercial	274,037				258,441			2,915			2,932			6,144			8,124			283,096			269,497
Total construction (excluding Construction - other)	427,532				404,482			32,471			34,454			52,634			65,930			512,637			504,866
	$	8,554,787			$	8,545,473		$	302,945		$	298,746		$	366,489		$	390,989		$	9,224,221		$	9,235,208
% of Total	92.7		%		92.6		%	3.3		%	3.2		%	4		%	4.2		%	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 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 risk rating process allows management to identify riskier credits in a timely manner and to allocate resources to managing troubled accounts.
The Corporation does not assign internal risk ratings to smaller balance, homogeneous loans, such as home equity, residential mortgage, consumer, leasing and other 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 these loans through the various delinquency status categories is a significant component of the allowance for credit losses methodology, which bases the probability of default on this migration.
The following table presents a summary of delinquency and non-performing status for home equity, residential mortgages, construction loans to individuals and consumer, leasing and other loans by class segment:
	Performing							Delinquent (1)						Non-performing (2)						Total
	March 31, 2014				December 31, 2013			March 31, 2014			December 31, 2013			March 31, 2014			December 31, 2013			March 31, 2014			December 31, 2013
	(dollars in thousands)
Real estate - home equity	$	1,711,430			$	1,731,185		$	11,978		$	16,029		$	17,088		$	16,983		$	1,740,496		$	1,764,197
Real estate - residential mortgage	1,281,854				1,282,754			20,306			23,279			29,305			31,347			1,331,465			1,337,380
Construction - other	70,096				68,258			940			—			544			548			71,580			68,806
Consumer - direct	116,748				126,666			3,634			3,586			2,872			2,391			123,254			132,643
Consumer - indirect	144,220				147,017			2,420			3,312			127			152			146,767			150,481
Total consumer	260,968				273,683			6,054			6,898			2,999			2,543			270,021			283,124
Leasing and other and overdrafts	95,141				92,876			794			581			74			48			96,009			93,505
	$	3,419,489			$	3,448,756		$	40,072		$	46,787		$	50,010		$	51,469		$	3,509,571		$	3,547,012
% of Total	97.4		%		97.2		%	1.2		%	1.3		%	1.4		%	1.5		%	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,
	2014				2013
	(in thousands)
Non-accrual loans	$	133,705			$	133,753
Accruing loans greater than 90 days past due	21,225				20,524
Total non-performing loans	154,930				154,277
Other real estate owned (OREO)	15,300				15,052
Total non-performing assets	$	170,230			$	169,329
The following table presents TDRs, by class segment:
	March 31,				December 31,
	2014				2013
	(in thousands)
Real-estate - residential mortgage	$	30,363			$	28,815
Real-estate - commercial mortgage	19,514				19,758
Construction - commercial residential	8,430				10,117
Commercial - secured	6,674				7,933
Real estate - home equity	2,606				1,365
Commercial - unsecured	81				112
Consumer - direct	15				11
Consumer - indirect	1				—
Total accruing TDRs	67,684				68,111
Non-accrual TDRs (1)	27,487				30,209
Total TDRs	$	95,171			$	98,320
-1	Included within non-accrual loans in the preceding table detailing non-performing assets.
As of March 31, 2014 and December 31, 2013, there were $5.2 million and $9.6 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, 2014 and 2013 that were modified during the three months ended March 31, 2014 and 2013:
	Three months ended March 31
	2014						2013
	Number of Loans		Recorded Investment				Number of Loans	Recorded Investment
	(dollars in thousands)
Real estate - commercial mortgage	7		$	7,470			5	$	2,652
Real estate - residential mortgage	6		706				28	3,966
Construction - commercial residential	1		548				2	628
Real estate - home equity	10		529				17	1,180
Consumer - direct	4		4				—	—
Consumer - indirect	3		1				—	—
Commercial - secured	—		—				5	457
Commercial - unsecured	—		—				1	15
	31		$	9,258			58	$	8,898
The following table presents TDRs, by class segment, as of March 31, 2014 and 2013 that were modified within the previous 12 months and had a post-modification payment default during the three months ended March 31, 2014 and 2013. The Corporation defines a payment default as a single missed payment.
	Three months ended March 31
	2014						2013
	Number of Loans		Recorded Investment				Number of Loans	Recorded Investment
	(dollars in thousands)
Real estate - residential mortgage	12		$	2,522			31	$	5,849
Real estate - home equity	14		1,432				20	1,233
Construction - commercial residential	1		619				4	1,308
Real estate - commercial mortgage	3		126				12	6,893
Commercial - secured	1		11				6	708
Construction - commercial	—		—				1	930
	31		$	4,710			74	$	16,921
The following table presents past due status and non-accrual loans by portfolio segment and class segment:
	31-Mar-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	$	13,290			$	4,633		$	3,492		$	42,384		$	45,876		$	63,799		$	5,073,655		$	5,137,454
Commercial - secured	9,370				1,886			308			37,958			38,266			49,522			3,325,519			3,375,041
Commercial - unsecured	304				275			4			560			564			1,143			197,946			199,089
Total commercial - industrial, financial and agricultural	9,674				2,161			312			38,518			38,830			50,665			3,523,465			3,574,130
Real estate - home equity	9,347				2,631			5,540			11,548			17,088			29,066			1,711,430			1,740,496
Real estate - residential mortgage	14,682				5,624			7,986			21,319			29,305			49,611			1,281,854			1,331,465
Construction - commercial residential	1,352				228			796			17,238			18,034			19,614			209,927			229,541
Construction - commercial	—				—			27			2,153			2,180			2,180			280,916			283,096
Construction - other	940				—			—			544			544			1,484			70,096			71,580
Total real estate - construction	2,292				228			823			19,935			20,758			23,278			560,939			584,217
Consumer - direct	2,495				1,139			2,872			—			2,872			6,506			116,748			123,254
Consumer - indirect	1,960				460			126			1			127			2,547			144,220			146,767
Total consumer	4,455				1,599			2,998			1			2,999			9,053			260,968			270,021
Leasing and other and overdrafts	331				463			74			—			74			868			95,141			96,009
	$	54,071			$	17,339		$	21,225		$	133,705		$	154,930		$	226,340		$	12,507,452		$	12,733,792
	31-Dec-13
	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	$	15,474			$	4,009		$	3,502		$	40,566		$	44,068		$	63,551		$	5,038,371		$	5,101,922
Commercial - secured	8,916				1,365			1,311			35,774			37,085			47,366			3,356,797			3,404,163
Commercial - unsecured	332				125			—			936			936			1,393			222,864			224,257
Total commercial - industrial, financial and agricultural	9,248				1,490			1,311			36,710			38,021			48,759			3,579,661			3,628,420
Real estate - home equity	13,555				2,474			3,711			13,272			16,983			33,012			1,731,185			1,764,197
Real estate - residential mortgage	16,969				6,310			9,065			22,282			31,347			54,626			1,282,754			1,337,380
Construction - commercial residential	—				645			346			18,202			18,548			19,193			216,176			235,369
Construction - commercial	14				—			—			2,171			2,171			2,185			267,312			269,497
Construction - other	—				—			—			548			548			548			68,258			68,806
Total real estate - construction	14				645			346			20,921			21,267			21,926			551,746			573,672
Consumer - direct	2,091				1,495			2,391			—			2,391			5,977			126,666			132,643
Consumer - indirect	2,864				448			150			2			152			3,464			147,017			150,481
Total consumer	4,955				1,943			2,541			2			2,543			9,441			273,683			283,124
Leasing and other and overdrafts	559				22			48			—			48			629			92,876			93,505
	$	60,774			$	16,893		$	20,524		$	133,753		$	154,277		$	231,944		$	12,550,276		$	12,782,220
The following table presents past due status and non-accrual loans by portfolio segment and class segment:
	31-Mar-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	$	13,290			$	4,633		$	3,492		$	42,384		$	45,876		$	63,799		$	5,073,655		$	5,137,454
Commercial - secured	9,370				1,886			308			37,958			38,266			49,522			3,325,519			3,375,041
Commercial - unsecured	304				275			4			560			564			1,143			197,946			199,089
Total commercial - industrial, financial and agricultural	9,674				2,161			312			38,518			38,830			50,665			3,523,465			3,574,130
Real estate - home equity	9,347				2,631			5,540			11,548			17,088			29,066			1,711,430			1,740,496
Real estate - residential mortgage	14,682				5,624			7,986			21,319			29,305			49,611			1,281,854			1,331,465
Construction - commercial residential	1,352				228			796			17,238			18,034			19,614			209,927			229,541
Construction - commercial	—				—			27			2,153			2,180			2,180			280,916			283,096
Construction - other	940				—			—			544			544			1,484			70,096			71,580
Total real estate - construction	2,292				228			823			19,935			20,758			23,278			560,939			584,217
Consumer - direct	2,495				1,139			2,872			—			2,872			6,506			116,748			123,254
Consumer - indirect	1,960				460			126			1			127			2,547			144,220			146,767
Total consumer	4,455				1,599			2,998			1			2,999			9,053			260,968			270,021
Leasing and other and overdrafts	331				463			74			—			74			868			95,141			96,009
	$	54,071			$	17,339		$	21,225		$	133,705		$	154,930		$	226,340		$	12,507,452		$	12,733,792
Summary of Gross Loans by Type	'
	Loans, net of unearned income are summarized as follows:
		31-Mar-14				31-Dec-13
		(in thousands)
	Real-estate - commercial mortgage	$	5,137,454			$	5,101,922
	Commercial - industrial, financial and agricultural	3,574,130				3,628,420
	Real-estate - home equity	1,740,496				1,764,197
	Real-estate - residential mortgage	1,331,465				1,337,380
	Real-estate - construction	584,217				573,672
	Consumer	270,021				283,124
	Leasing and other	103,192				99,256
	Overdrafts	3,034				4,045
	Loans, gross of unearned income	12,744,009				12,792,016
	Unearned income	(10,217		)		(9,796		)
	Loans, net of unearned income	$	12,733,792			$	12,782,220
Schedule of Allowance for Credit Losses	'
	The following table presents the components of the allowance for credit losses:
		March 31,				December 31,
		2014				2013
		(in thousands)
	Allowance for loan losses	$	197,089			$	202,780
	Reserve for unfunded lending commitments	1,917				2,137
	Allowance for credit losses	$	199,006			$	204,917
Activity in the Allowance for Credit Losses	'
	The following table presents the activity in the allowance for credit losses:
		Three months ended March 31
		2014				2013
		(in thousands)
	Balance at beginning of period	$	204,917			$	225,439
	Loans charged off	(10,268		)		(22,106		)
	Recoveries of loans previously charged off	1,857				3,194
	Net loans charged off	(8,411		)		(18,912		)
	Provision for credit losses	2,500				15,000
	Balance at end of period	$	199,006			$	221,527
	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, 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
	Three months ended March 31, 2013
	Balance at December 31, 2012	$	62,928			$	60,205		$	22,776		$	34,536		$	17,287		$	2,367		$	2,752		$	21,052		$	223,903
	Loans charged off	(4,133		)		(9,502		)	(2,404		)	(3,050		)	(1,986		)	(550		)	(481		)	—			(22,106		)
	Recoveries of loans previously charged off	1,064				379			331			81			671			506			162			—			3,194
	Net loans charged off	(3,069		)		(9,123		)	(2,073		)	(2,969		)	(1,315		)	(44		)	(319		)	—			(18,912		)
	Provision for loan losses (1)	4,126				5,590			2,998			1,917			32			(37		)	354			70			15,050
	Balance at March 31, 2013	$	63,985			$	56,672		$	23,701		$	33,484		$	16,004		$	2,286		$	2,787		$	21,122		$	220,041
	-1	The provision for loan losses excluded a $220,000 decrease in the reserve for unfunded lending commitments for the three months ended March 31, 2014 and excluded a $50,000 decrease in the reserve for unfunded lending commitments for the three months ended March 31, 2013. The total provision for credit losses, comprised of allocations for both funded and unfunded loans, was $2.5 million for the three months ended March 31, 2014 and $15.0 million for the three months ended March 31, 2013.
	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, 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
	Allowance for loan losses at March 31, 2013
	Measured for impairment under FASB ASC Subtopic 450-20	$	40,920			$	38,988		$	14,947		$	10,075		$	8,838		$	2,271		$	2,758		$	21,122		$	139,919
	Evaluated for impairment under FASB ASC Section 310-10-35	23,065				17,684			8,754			23,409			7,166			15			29			N/A			80,122
		$	63,985			$	56,672		$	23,701		$	33,484		$	16,004		$	2,286		$	2,787		$	21,122		$	220,041
	Loans, net of unearned income at March 31, 2013
	Measured for impairment under FASB ASC Subtopic 450-20	$	4,646,355			$	3,591,753		$	1,675,577		$	1,247,976		$	554,757		$	309,120		$	89,195		N/A			$	12,114,733
	Evaluated for impairment under FASB ASC Section 310-10-35	83,575				66,730			13,869			55,478			42,840			18			45			N/A			262,555
		$	4,729,930			$	3,658,483		$	1,689,446		$	1,303,454		$	597,597		$	309,138		$	89,240		N/A			$	12,377,288
	-1	The unallocated allowance, which was approximately 6% and 10% of the total allowance for credit losses as of March 31, 2014 and March 31, 2013, 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
Allowance For Credit Losses On Financing Receivables Sold	'
		Real Estate - Commercial mortgage				Commercial - industrial, financial and agricultural			Real Estate - Construction			Total
		(in thousands)
	Unpaid principal balance of loans sold	$	7,690			$	4,730		$	740		$	13,160
	Charge-offs prior to sale	(2,420		)		(710		)	(150		)	(3,280		)
	Net recorded investment in loans sold	5,270				4,020			590			9,880
	Proceeds from sale, net of selling expenses	2,770				1,730			140			4,640
	Total charge-off upon sale	$	(2,500	)		$	(2,290	)	$	(450	)	$	(5,240	)
	Existing allocation for credit losses on sold loans	$	(2,870	)		$	(1,960	)	$	(300	)	$	(5,130	)
Total Impaired Loans by Class Segment	'
	The following table presents total impaired loans by class segment:
		March 31, 2014										December 31, 2013
		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	$	27,433			$	23,491		$	—		$	28,892		$	24,494		$	—
	Commercial - secured	23,862				20,867			—			23,890			21,383			—
	Real estate - home equity	399				300			—			399			300			—
	Real estate - residential mortgage	317				317			—			—			—			—
	Construction - commercial residential	26,475				20,705			—			18,943			13,740			—
	Construction - commercial	2,992				1,962			—			2,996			1,976			—
		81,478				67,642						75,120			61,893
	With a related allowance recorded:
	Real estate - commercial mortgage	47,010				38,407			16,394			43,282			35,830			14,444
	Commercial - secured	36,309				23,765			13,232			34,267			22,324			13,315
	Commercial - unsecured	693				641			472			1,113			1,048			752
	Real estate - home equity	19,420				13,854			9,491			20,383			14,337			9,059
	Real estate - residential mortgage	61,733				51,365			21,711			63,682			51,097			21,745
	Construction - commercial residential	15,753				4,963			2,212			25,769			14,579			3,493
	Construction - commercial	481				191			76			485			195			77
	Construction - other	718				544			298			719			548			301
	Consumer - direct	15				15			13			11			11			10
	Consumer - indirect	15				2			2			2			2			2
		182,147				133,747			63,901			189,713			139,971			63,198
	Total	$	263,625			$	201,389		$	63,901		$	264,833		$	201,864		$	63,198
	As of March 31, 2014 and December 31, 2013, there were $67.6 million and $61.9 million, respectively, of impaired loans that did not have a related allowance for loan loss. The estimated fair values of the collateral for these loans exceeded their carrying amount, or they were previously charged down to 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
		2014							2013
		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	$	23,993			$	86		$	32,140		$	160
	Commercial - secured	21,125				35			31,413			34
	Commercial - unsecured	—				—			66			—
	Real estate - home equity	300				—			205			1
	Real estate - residential mortgage	159				1			991			12
	Construction - commercial residential	17,223				60			22,650			63
	Construction - commercial	1,969				—			4,979			2
		64,769				182			92,444			272
	With a related allowance recorded:
	Real estate - commercial mortgage	37,119				132			54,464			221
	Commercial - secured	23,045				38			35,864			43
	Commercial - unsecured	845				1			1,743			2
	Real estate - home equity	14,096				20			13,301			16
	Real estate - residential mortgage	51,231				294			53,797			339
	Construction - commercial residential	9,771				35			11,496			42
	Construction - commercial	193				—			2,758			3
	Construction - other	546				—			533			1
	Consumer - direct	13				—			24			—
	Consumer - indirect	2				—			—			—
	Leasing and other and overdrafts	—				—			28			—
		136,861				520			174,008			667
	Total	$	201,630			$	702		$	266,452		$	939
	-1	All impaired loans, excluding accruing TDRs, were non-accrual loans. Interest income recognized for the three months ended March 31, 2014 and 2013 represents amounts earned on accruing TDRs.
Financing Receivable Credit Quality Indicators	'
	The following table presents internal credit risk ratings for commercial - secured loans, commercial - unsecured loans, commercial mortgages, construction - commercial residential loans and construction - commercial loans:
		Pass							Special Mention						Substandard or Lower						Total
		March 31, 2014				December 31, 2013			March 31, 2014			December 31, 2013			March 31, 2014			December 31, 2013			March 31, 2014			December 31, 2013
		(dollars in thousands)
	Real estate - commercial mortgage	$	4,833,982			$	4,763,987		$	122,929		$	141,013		$	180,543		$	196,922		$	5,137,454		$	5,101,922
	Commercial - secured	3,109,539				3,167,168			137,176			111,613			128,326			125,382			3,375,041			3,404,163
	Commercial -unsecured	183,734				209,836			10,369			11,666			4,986			2,755			199,089			224,257
	Total commercial - industrial, financial and agricultural	3,293,273				3,377,004			147,545			123,279			133,312			128,137			3,574,130			3,628,420
	Construction - commercial residential	153,495				146,041			29,556			31,522			46,490			57,806			229,541			235,369
	Construction - commercial	274,037				258,441			2,915			2,932			6,144			8,124			283,096			269,497
	Total construction (excluding Construction - other)	427,532				404,482			32,471			34,454			52,634			65,930			512,637			504,866
		$	8,554,787			$	8,545,473		$	302,945		$	298,746		$	366,489		$	390,989		$	9,224,221		$	9,235,208
	% of Total	92.7		%		92.6		%	3.3		%	3.2		%	4		%	4.2		%	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 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 risk rating process allows management to identify riskier credits in a timely manner and to allocate resources to managing troubled accounts.
	The Corporation does not assign internal risk ratings to smaller balance, homogeneous loans, such as home equity, residential mortgage, consumer, leasing and other 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 these loans through the various delinquency status categories is a significant component of the allowance for credit losses methodology, which bases the probability of default on this migration.
	The following table presents a summary of delinquency and non-performing status for home equity, residential mortgages, construction loans to individuals and consumer, leasing and other loans by class segment:
		Performing							Delinquent (1)						Non-performing (2)						Total
		March 31, 2014				December 31, 2013			March 31, 2014			December 31, 2013			March 31, 2014			December 31, 2013			March 31, 2014			December 31, 2013
		(dollars in thousands)
	Real estate - home equity	$	1,711,430			$	1,731,185		$	11,978		$	16,029		$	17,088		$	16,983		$	1,740,496		$	1,764,197
	Real estate - residential mortgage	1,281,854				1,282,754			20,306			23,279			29,305			31,347			1,331,465			1,337,380
	Construction - other	70,096				68,258			940			—			544			548			71,580			68,806
	Consumer - direct	116,748				126,666			3,634			3,586			2,872			2,391			123,254			132,643
	Consumer - indirect	144,220				147,017			2,420			3,312			127			152			146,767			150,481
	Total consumer	260,968				273,683			6,054			6,898			2,999			2,543			270,021			283,124
	Leasing and other and overdrafts	95,141				92,876			794			581			74			48			96,009			93,505
		$	3,419,489			$	3,448,756		$	40,072		$	46,787		$	50,010		$	51,469		$	3,509,571		$	3,547,012
	% of Total	97.4		%		97.2		%	1.2		%	1.3		%	1.4		%	1.5		%	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,
		2014				2013
		(in thousands)
	Non-accrual loans	$	133,705			$	133,753
	Accruing loans greater than 90 days past due	21,225				20,524
	Total non-performing loans	154,930				154,277
	Other real estate owned (OREO)	15,300				15,052
	Total non-performing assets	$	170,230			$	169,329
Troubled Debt Restructurings on Financing Receivables	'
	The following table presents TDRs, by class segment:
		March 31,				December 31,
		2014				2013
		(in thousands)
	Real-estate - residential mortgage	$	30,363			$	28,815
	Real-estate - commercial mortgage	19,514				19,758
	Construction - commercial residential	8,430				10,117
	Commercial - secured	6,674				7,933
	Real estate - home equity	2,606				1,365
	Commercial - unsecured	81				112
	Consumer - direct	15				11
	Consumer - indirect	1				—
	Total accruing TDRs	67,684				68,111
	Non-accrual TDRs (1)	27,487				30,209
	Total TDRs	$	95,171			$	98,320
	-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, 2014 and 2013 that were modified during the three months ended March 31, 2014 and 2013:
		Three months ended March 31
		2014						2013
		Number of Loans		Recorded Investment				Number of Loans	Recorded Investment
		(dollars in thousands)
	Real estate - commercial mortgage	7		$	7,470			5	$	2,652
	Real estate - residential mortgage	6		706				28	3,966
	Construction - commercial residential	1		548				2	628
	Real estate - home equity	10		529				17	1,180
	Consumer - direct	4		4				—	—
	Consumer - indirect	3		1				—	—
	Commercial - secured	—		—				5	457
	Commercial - unsecured	—		—				1	15
		31		$	9,258			58	$	8,898
	The following table presents TDRs, by class segment, as of March 31, 2014 and 2013 that were modified within the previous 12 months and had a post-modification payment default during the three months ended March 31, 2014 and 2013. The Corporation defines a payment default as a single missed payment.
		Three months ended March 31
		2014						2013
		Number of Loans		Recorded Investment				Number of Loans	Recorded Investment
		(dollars in thousands)
	Real estate - residential mortgage	12		$	2,522			31	$	5,849
	Real estate - home equity	14		1,432				20	1,233
	Construction - commercial residential	1		619				4	1,308
	Real estate - commercial mortgage	3		126				12	6,893
	Commercial - secured	1		11				6	708
	Construction - commercial	—		—				1	930
		31		$	4,710			74	$	16,921
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:
		31-Mar-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	$	13,290			$	4,633		$	3,492		$	42,384		$	45,876		$	63,799		$	5,073,655		$	5,137,454
	Commercial - secured	9,370				1,886			308			37,958			38,266			49,522			3,325,519			3,375,041
	Commercial - unsecured	304				275			4			560			564			1,143			197,946			199,089
	Total commercial - industrial, financial and agricultural	9,674				2,161			312			38,518			38,830			50,665			3,523,465			3,574,130
	Real estate - home equity	9,347				2,631			5,540			11,548			17,088			29,066			1,711,430			1,740,496
	Real estate - residential mortgage	14,682				5,624			7,986			21,319			29,305			49,611			1,281,854			1,331,465
	Construction - commercial residential	1,352				228			796			17,238			18,034			19,614			209,927			229,541
	Construction - commercial	—				—			27			2,153			2,180			2,180			280,916			283,096
	Construction - other	940				—			—			544			544			1,484			70,096			71,580
	Total real estate - construction	2,292				228			823			19,935			20,758			23,278			560,939			584,217
	Consumer - direct	2,495				1,139			2,872			—			2,872			6,506			116,748			123,254
	Consumer - indirect	1,960				460			126			1			127			2,547			144,220			146,767
	Total consumer	4,455				1,599			2,998			1			2,999			9,053			260,968			270,021
	Leasing and other and overdrafts	331				463			74			—			74			868			95,141			96,009
		$	54,071			$	17,339		$	21,225		$	133,705		$	154,930		$	226,340		$	12,507,452		$	12,733,792
		31-Dec-13
		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	$	15,474			$	4,009		$	3,502		$	40,566		$	44,068		$	63,551		$	5,038,371		$	5,101,922
	Commercial - secured	8,916				1,365			1,311			35,774			37,085			47,366			3,356,797			3,404,163
	Commercial - unsecured	332				125			—			936			936			1,393			222,864			224,257
	Total commercial - industrial, financial and agricultural	9,248				1,490			1,311			36,710			38,021			48,759			3,579,661			3,628,420
	Real estate - home equity	13,555				2,474			3,711			13,272			16,983			33,012			1,731,185			1,764,197
	Real estate - residential mortgage	16,969				6,310			9,065			22,282			31,347			54,626			1,282,754			1,337,380
	Construction - commercial residential	—				645			346			18,202			18,548			19,193			216,176			235,369
	Construction - commercial	14				—			—			2,171			2,171			2,185			267,312			269,497
	Construction - other	—				—			—			548			548			548			68,258			68,806
	Total real estate - construction	14				645			346			20,921			21,267			21,926			551,746			573,672
	Consumer - direct	2,091				1,495			2,391			—			2,391			5,977			126,666			132,643
	Consumer - indirect	2,864				448			150			2			152			3,464			147,017			150,481
	Total consumer	4,955				1,943			2,541			2			2,543			9,441			273,683			283,124
	Leasing and other and overdrafts	559				22			48			—			48			629			92,876			93,505
		$	60,774			$	16,893		$	20,524		$	133,753		$	154,277		$	231,944		$	12,550,276		$	12,782,220

Mortgage_Servicing_Rights_Tabl

Mortgage Servicing Rights (Tables)	3 Months Ended
	Mar. 31, 2014
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
		31-Mar
		2014			2013
		(in thousands)
	Amortized cost:
	Balance at beginning of period	$	42,452		$	39,737
	Originations of mortgage servicing rights	1,115			4,227
	Amortization	(1,899		)	(2,958		)
	Balance at end of period	$	41,668		$	41,006
	Valuation allowance	$	—		$	(3,680	)
	Net MSRs at end of period	$	41,668		37,326

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2014
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
		2014			2013
		(in thousands)
	Stock-based compensation expense	$	1,033		$	847
	Tax benefit	(263		)	(224		)
	Stock-based compensation expense, net of tax	$	770		$	623

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables)	3 Months Ended
	Mar. 31, 2014
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, as determined by consulting actuaries, consisted of the following components:
		Three months ended
		31-Mar
		2014			2013
		(in thousands)
	Service cost (1)	$	92		$	51
	Interest cost	853			772
	Expected return on plan assets	(811		)	(800		)
	Net amortization and deferral	244			596
	Net periodic benefit cost	$	378		$	619
	-1	The Pension Plan service cost recorded for the three months ended March 31, 2014 and 2013, respectively, 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 in 2014, as determined by consulting actuaries and included as a component of salaries and employee benefits on the consolidated statements of income. The gain resulted from the recognition of the remaining pre-curtailment prior service cost as of December 31, 2013. In addition, this amendment resulted in a $3.3 million decrease in the accumulated postretirement benefit obligation and a corresponding increase in unrecognized prior service cost credits.
	The net periodic benefit cost of the Corporation’s Postretirement Plan as determined by consulting actuaries, consisted of the following components, excluding the impact of the $1.5 million gain:
		Three months ended
		31-Mar
		2014			2013
		(in thousands)
	Service cost	$	15		$	57
	Interest cost	61			81
	Expected return on plan assets	—			—
	Net accretion and deferral	(95		)	(91		)
	Net periodic benefit (income) cost	$	(19	)	$	47
	-1	As a result of the plan amendment, additional participant benefits are not accrued under the Postretirement Plan after February 1, 2014. Service costs recorded after the effective date of the amendment represent administrative costs associated with the plan.
	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_Instrumen1

Derivative Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2014
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, 2014						December 31, 2013
		Notional			Asset			Notional		Asset
		Amount			(Liability)			Amount		(Liability)
					Fair Value					Fair Value
		(in thousands)
	Interest Rate Locks with Customers
	Positive fair values	$	91,145		$	1,202		$	75,217	$	867
	Negative fair values	1,258			(5		)	11,393		(59		)
	Net interest rate locks with customers				1,197					808
	Forward Commitments
	Positive fair values	4,904			2			87,904		1,263
	Negative fair values	95,750			(242		)	2,373		(5		)
	Net forward commitments				(240		)			1,258
	Interest Rate Swaps with Customers
	Positive fair values	228,588			4,955			111,899		2,105
	Negative fair values	81,163			(1,638		)	105,673		(2,993		)
	Net interest rate swaps with customers				3,317					(888		)
	Interest Rate Swaps with Dealer Counterparties
	Positive fair values	81,163			1,638			105,673		2,993
	Negative fair values	228,588			(4,955		)	111,899		(2,105		)
	Net interest rate swaps with dealer counterparties				(3,317		)			888
	Foreign Exchange Contracts with Customers
	Positive fair values	9,927			56			2,150		24
	Negative fair values	9,965			(183		)	12,775		(343		)
	Net foreign exchange contracts with customers				(127		)			(319		)
	Foreign Exchange Contracts with Correspondent Banks
	Positive fair values	15,036			198			17,348		498
	Negative fair values	4,466			(16		)	5,872		(48		)
	Net foreign exchange contracts with correspondent banks				182					450
	Net derivative fair value asset				$	1,012				$	2,197
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
		31-Mar
		2014			2013
		(in thousands)
	Interest rate locks with customers	$	389		$	(2,538	)
	Forward commitments	(1,498		)	428
	Interest rate swaps with customers	4,205			(408		)
	Interest rate swaps with dealer counterparties	(4,205		)	408
	Foreign exchange contracts with customers	192			460
	Foreign exchange contracts with correspondent banks	(268		)	418
	Net fair value losses on derivative financial instruments	$	(1,185	)	$	(1,232	)

Balance_Sheet_Offsetting_Table

Balance Sheet Offsetting (Tables)	3 Months Ended
	Mar. 31, 2014
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, 2014
	Interest rate swap derivative assets	$	6,593	$	(1,830	)	$	—		$	4,763
	Foreign exchange derivative assets with correspondent banks	198		(16		)	—			182
	Total	$	6,791	$	(1,846	)	$	—		$	4,945
	Interest rate swap derivative liabilities	$	6,593	$	(1,830	)	$	(3,870	)	$	893
	Foreign exchange derivative liabilities with correspondent banks	16		(16		)	—			—
	Total	$	6,609	$	(1,846	)	$	(3,870	)	$	893
	December 31, 2013
	Interest rate swap derivative assets	$	5,098	$	(2,104	)	$	—		$	2,994
	Interest rate swap derivative liabilities	$	5,098	$	(2,104	)	$	(730	)	$	2,264
	-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, 2014
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, 2013
		2014
		(in thousands)
	Commitments to extend credit	$	4,258,552	$	4,379,578
	Standby letters of credit	387,424		391,445
	Commercial letters of credit	35,404		36,344

Fair_Value_Option_Tables

Fair Value Option (Tables)	3 Months Ended
	Mar. 31, 2014
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,
		2014		2013
		(in thousands)
	Cost	$	23,941	$	21,172
	Fair value	24,417		21,351

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2014
Fair Value Disclosures [Abstract]	'
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	'
	ollowing 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, 2014
		Level 1			Level 2		Level 3			Total
		(in thousands)
	Mortgage loans held for sale	$	—		$	24,417	$	—		$	24,417
	Available for sale investment securities:
	Equity securities	45,734			—		—			45,734
	U.S. Government securities	—			526		—			526
	U.S. Government sponsored agency securities	—			280		—			280
	State and municipal securities	—			283,453		—			283,453
	Corporate debt securities	—			91,073		9,479			100,552
	Collateralized mortgage obligations	—			1,006,737		—			1,006,737
	Mortgage-backed securities	—			916,203		—			916,203
	Auction rate securities	—			—		147,713			147,713
	Total available for sale investments	45,734			2,298,272		157,192			2,501,198
	Other assets	15,943			7,798		—			23,741
	Total assets	$	61,677		$	2,330,487	$	157,192		$	2,549,356
	Other liabilities	$	15,886		$	6,841	$	—		$	22,727
		December 31, 2013
		Level 1			Level 2		Level 3			Total
		(in thousands)
	Mortgage loans held for sale	$	—		$	21,351	$	—		$	21,351
	Available for sale investment securities:
	Equity securities	46,201			—		—			46,201
	U.S. Government securities	—			525		—			525
	U.S. Government sponsored agency securities	—			726		—			726
	State and municipal securities	—			284,849		—			284,849
	Corporate debt securities	—			89,662		9,087			98,749
	Collateralized mortgage obligations	—			1,032,398		—			1,032,398
	Mortgage-backed securities	—			945,712		—			945,712
	Auction rate securities	—			—		159,274			159,274
	Total available for sale investments	46,201			2,353,872		168,361			2,568,434
	Other assets	15,779			7,227		—			23,006
	Total assets	$	61,980		$	2,382,450	$	168,361		$	2,612,791
	Other liabilities	$	15,648		$	5,161	$	—		$	20,809
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, 2014
		Pooled Trust			Single-issuer		ARCs
		Preferred			Trust Preferred
		Securities			Securities
		(in thousands)
	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
		Three months ended March 31, 2013
	Balance at December 31, 2012	$	6,927		$	3,360	$	149,339
	Unrealized adjustment to fair value (1)	1,429			7		5,360
	Settlements - calls	—			—		(342		)
	Discount accretion (2)	—			3		282
	Balance at March 31, 2013	$	8,356		$	3,370	$	154,639
	-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 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	'
	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, 2014
		Level 1			Level 2		Level 3			Total
		(in thousands)
	Net loans	$	—		$	—	$	137,488		$	137,488
	Other financial assets	—			—		56,968			56,968
	Total assets	$	—		$	—	$	194,456		$	194,456
		December 31, 2013
		Level 1			Level 2		Level 3			Total
		(in thousands)
	Net loans	$	—		$	—	$	138,666		$	138,666
	Other financial assets	—			—		57,504			57,504
	Total assets	$	—		$	—	$	196,170		$	196,170
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, 2014 and December 31, 2013. In addition, a general description of the methods and assumptions used to estimate such fair values is also provided.
	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.
		March 31, 2014					December 31, 2013
		Book Value			Estimated		Book Value			Estimated
					Fair Value					Fair Value
		(in thousands)
	FINANCIAL ASSETS
	Cash and due from banks	$	260,389		$	260,389	$	218,540		$	218,540
	Interest-bearing deposits with other banks	225,428			225,428		163,988			163,988
	Federal Reserve Bank and Federal Home Loan Bank stock	81,634			81,634		84,173			84,173
	Loans held for sale (1)	24,417			24,417		21,351			21,351
	Available for sale investment securities (1)	2,501,198			2,501,198		2,568,434			2,568,434
	Loans, net of unearned income (1)	12,733,792			12,628,983		12,782,220			12,688,774
	Accrued interest receivable	43,376			43,376		44,037			44,037
	Other financial assets (1)	149,453			149,453		146,933			146,933
	FINANCIAL LIABILITIES
	Demand and savings deposits	$	9,667,357		$	9,667,357	$	9,573,264		$	9,573,264
	Time deposits	3,002,560			3,011,698		2,917,922			2,927,374
	Short-term borrowings	1,069,684			1,069,684		1,258,629			1,258,629
	Accrued interest payable	16,972			16,972		15,218			15,218
	Other financial liabilities (1)	133,848			133,848		124,440			124,440
	FHLB advances and long-term debt	883,461			881,197		883,584			875,984
	-1
Schedule of Financial Instruments Classified as Predominantly Short-Term Instruments	'
	The following instruments are predominantly short-term:
	Assets		Liabilities
	Cash and due from banks		Demand and savings deposits
	Interest bearing deposits		Short-term borrowings
	Accrued interest receivable		Accrued interest payable

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, 2014	Mar. 31, 2013
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]	'	'
Weighted average shares outstanding (basic)	189,467	196,299
Effect of dilutive securities	1,022	918
Weighted average shares outstanding (diluted)	190,489	197,217

Net_Income_Per_Share_Narrative

Net Income Per Share Narrative (Details) (Stock Option [Member])	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Stock Option [Member]	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	3.1	3.7

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income Changes in Other Comprehensive Income (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]	'	'
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax	$21,435	$192
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	-7,502	-67
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	13,933	125
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax	-1,452	'
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax	508	'
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	-944	'
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, before Tax	'	-2,473
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Tax	'	865
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax	-944	-1,608
Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Income (Loss), before Tax, Including Portion Attributable to Noncontrolling Interest	291	1,666
Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	-102	-583
Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	189	1,083
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	52	54
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	-18	-20
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	34	34
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	2,144	0
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit) Recognized in Net Periodic Benefit Cost, before Tax	149	505
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Pension Cost, Tax Effect	-53	-177
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Pension Cost, Net of Tax	96	328
Other Comprehensive Income (Loss), before Tax	23,766	-56
Other Comprehensive Income (Loss), Tax	-8,314	18
Other Comprehensive Income (Loss)	$15,452	($38)

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive Income Components of Other Comprehensive Income (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Accumulated Other Comprehensive Income [Roll Forward]	'	'
Beginning Balance	($37,341)	$5,675
Other comprehensive income (loss) before reclassifications	16,266	1,208
Amounts reclassified from accumulated other comprehensive income (loss)	-814	-1,246
Ending Balance	-21,889	5,637
Unrealized Gains on Investment Securities Not Other-Than-Temporarily Impaired [Member]	'	'
Accumulated Other Comprehensive Income [Roll Forward]	'	'
Beginning Balance	-27,510	26,361
Other comprehensive income (loss) before reclassifications	13,933	125
Amounts reclassified from accumulated other comprehensive income (loss)	0	-1,608
Ending Balance	-13,577	24,878
Unrealized Non-Credit Losses on Other-Than-Temporarily Impaired Debt Securities [Member]	'	'
Accumulated Other Comprehensive Income [Roll Forward]	'	'
Beginning Balance	1,652	613
Other comprehensive income (loss) before reclassifications	189	1,083
Amounts reclassified from accumulated other comprehensive income (loss)	0	0
Ending Balance	1,841	1,696
Unrealized Effective Portions of Losses on Forward-Starting Interest Rate Swaps [Member]	'	'
Accumulated Other Comprehensive Income [Roll Forward]	'	'
Beginning Balance	-2,682	-2,818
Amounts reclassified from accumulated other comprehensive income (loss)	34	34
Ending Balance	-2,648	-2,784
Unrecognized Pension and Postretirement Plan Items [Member]	'	'
Accumulated Other Comprehensive Income [Roll Forward]	'	'
Beginning Balance	-8,801	-18,481
Other comprehensive income (loss) before reclassifications	2,144	'
Amounts reclassified from accumulated other comprehensive income (loss)	-848	328
Ending Balance	($7,505)	($18,153)

Investment_Securities_Schedule

Investment Securities Schedule of Amortized Cost and Fair Values of Investment Securities (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Statement of Investments [Line Items]	'	'
Available-for-sale Securities, Amortized Cost Basis	$2,519,248	$2,608,210
Available-for-sale Securities, Gross Unrealized Gain, Accumulated Investments	46,234	46,681
Available-for-sale Securities, Gross Unrealized Loss, Accumulated Investments	64,284	86,457
Available-for-sale Securities	2,501,198	2,568,434
Equity Securities [Member]	'	'
Statement of Investments [Line Items]	'	'
Available-for-sale Securities, Amortized Cost Basis	34,231	33,922
Available-for-sale Securities, Gross Unrealized Gain, Accumulated Investments	11,524	12,355
Available-for-sale Securities, Gross Unrealized Loss, Accumulated Investments	21	76
Available-for-sale Securities	45,734	46,201
U.S. Government Securities [Member]	'	'
Statement of Investments [Line Items]	'	'
Available-for-sale Securities, Amortized Cost Basis	526	525
Available-for-sale Securities, Gross Unrealized Gain, Accumulated Investments	0	0
Available-for-sale Securities, Gross Unrealized Loss, Accumulated Investments	0	0
Available-for-sale Securities	526	525
U.S. Government-Sponsored Agency Securities [Member]	'	'
Statement of Investments [Line Items]	'	'
Available-for-sale Securities, Amortized Cost Basis	275	720
Available-for-sale Securities, Gross Unrealized Gain, Accumulated Investments	6	7
Available-for-sale Securities, Gross Unrealized Loss, Accumulated Investments	1	1
Available-for-sale Securities	280	726
State and Municipal Securities [Member]	'	'
Statement of Investments [Line Items]	'	'
Available-for-sale Securities, Amortized Cost Basis	278,019	281,810
Available-for-sale Securities, Gross Unrealized Gain, Accumulated Investments	7,190	6,483
Available-for-sale Securities, Gross Unrealized Loss, Accumulated Investments	1,756	3,444
Available-for-sale Securities	283,453	284,849
Corporate Debt Securities [Member]	'	'
Statement of Investments [Line Items]	'	'
Available-for-sale Securities, Amortized Cost Basis	100,348	100,468
Available-for-sale Securities, Gross Unrealized Gain, Accumulated Investments	6,292	5,685
Available-for-sale Securities, Gross Unrealized Loss, Accumulated Investments	6,088	7,404
Available-for-sale Securities	100,552	98,749
Collateralized Mortgage Obligations [Member]	'	'
Statement of Investments [Line Items]	'	'
Available-for-sale Securities, Amortized Cost Basis	1,031,968	1,069,138
Available-for-sale Securities, Gross Unrealized Gain, Accumulated Investments	7,638	8,036
Available-for-sale Securities, Gross Unrealized Loss, Accumulated Investments	32,869	44,776
Available-for-sale Securities	1,006,737	1,032,398
Mortgage Backed Securities, Other [Member]	'	'
Statement of Investments [Line Items]	'	'
Available-for-sale Securities, Amortized Cost Basis	914,502	'
Available-for-sale Securities	916,203	'
Mortgage-Backed Securities [Member]	'	'
Statement of Investments [Line Items]	'	'
Available-for-sale Securities, Amortized Cost Basis	'	949,328
Available-for-sale Securities, Gross Unrealized Gain, Accumulated Investments	13,582	13,881
Available-for-sale Securities, Gross Unrealized Loss, Accumulated Investments	11,881	17,497
Available-for-sale Securities	'	945,712
Auction Rate Securities [Member]	'	'
Statement of Investments [Line Items]	'	'
Available-for-sale Securities, Amortized Cost Basis	159,379	172,299
Available-for-sale Securities, Gross Unrealized Gain, Accumulated Investments	2	234
Available-for-sale Securities, Gross Unrealized Loss, Accumulated Investments	11,668	13,259
Available-for-sale Securities	$147,713	$159,274

Investment_Securities_Schedule1

Investment Securities Schedule of Amortized Cost and Fair Values of Debt Securities by Contractual Maturities (Details) (USD $)	Mar. 31, 2014
In Thousands, unless otherwise specified
Statement of Investments [Line Items]	'
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis	$30,424
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value	30,517
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis	67,544
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value	71,350
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis	199,377
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value	203,240
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	241,202
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	227,417
Available for Sale Securities, Debt Securities, Amortized Cost, Before Securities Without Debt Maturities	538,547
Available for Sale Securities, Debt Maturities, Before Securities Without Single Maturities	532,524
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis	2,485,017
Available for Sale, Estimated Fair Value	2,455,464
Collateralized Mortgage Backed Securities [Member]	'
Statement of Investments [Line Items]	'
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost Basis	1,031,968
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	1,006,737
Collateralized Mortgage Obligations [Member]	'
Statement of Investments [Line Items]	'
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost Basis	914,502
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	$916,203

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, 2014	Mar. 31, 2013
Gain (Loss) on Investments [Line Items]	'	'
Gross Realized Gains	$323	$2,473
Available-for-sale Securities, Gross Realized Losses	-323	0
Available-for-sale Securities, Gross Realized Gain (Loss)	0	2,473
Equity Securities [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross Realized Gains	1	1,139
Available-for-sale Securities, Gross Realized Losses	0	0
Available-for-sale Securities, Gross Realized Gain (Loss)	1	1,139
Debt Securities [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross Realized Gains	322	1,334
Available-for-sale Securities, Gross Realized Losses	-323	0
Available-for-sale Securities, Gross Realized Gain (Loss)	($1)	$1,334

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, 2014	Mar. 31, 2013
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]	'	'
Balance of cumulative credit losses on debt securities, beginning of period	($20,691)	($23,079)
Reductions for increases in cash flows expected to be collected that are recognized over the remaining life of the security	4	0
Balance of cumulative credit losses on debt securities, end of period	($20,687)	($23,079)

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, 2014
In Thousands, unless otherwise specified
Estimated Fair Value, Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$1,091,977
Available-for-sale Securities, Continuous Unrealized Loss Position Less Than 12 Months, Aggregate Losses Accumulated In Investments	27,371
Estimated Fair Value, Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	504,345
Unrealized Losses, Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses,	-36,913
Estimated Fair Value, Total	1,596,322
Available-for-sale Securities, Continuous Unrealized Loss Position Aggregate Losses Accumulated In Investments	64,284
US Government-sponsored Enterprises Debt Securities [Member]	'
Estimated Fair Value, Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	0
Estimated Fair Value, Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	50
Estimated Fair Value, Total	50
Municipal Bonds [Member]	'
Estimated Fair Value, Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	50,286
Estimated Fair Value, Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	3,996
Estimated Fair Value, Total	54,282
Corporate Debt Securities [Member]	'
Estimated Fair Value, Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	3,939
Estimated Fair Value, Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	38,804
Estimated Fair Value, Total	42,743
Collateralized Mortgage Obligations [Member]	'
Estimated Fair Value, Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	416,584
Estimated Fair Value, Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	313,758
Estimated Fair Value, Total	730,342
Collateralized Mortgage Backed Securities [Member]	'
Estimated Fair Value, Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	621,165
Estimated Fair Value, Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0
Estimated Fair Value, Total	621,165
Auction Rate Securities [Member]	'
Estimated Fair Value, Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	0
Estimated Fair Value, Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	147,619
Estimated Fair Value, Total	147,619
Debt Securities [Member]	'
Estimated Fair Value, Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	1,091,974
Estimated Fair Value, Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	504,227
Estimated Fair Value, Total	1,596,201
Equity Securities [Member]	'
Estimated Fair Value, Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	3
Estimated Fair Value, Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	118
Estimated Fair Value, Total	121
US Government Agencies Debt Securities [Member]	'
Available-for-sale Securities, Continuous Unrealized Loss Position Less Than 12 Months, Aggregate Losses Accumulated In Investments	0
Available-for-sale Securities, Continuous Unrealized Loss Position 12 Months Or Longer, Aggregate Losses Accumulated In Investments	1
Available-for-sale Securities, Continuous Unrealized Loss Position Aggregate Losses Accumulated In Investments	1
Equity Securities [Member]	'
Available-for-sale Securities, Continuous Unrealized Loss Position Less Than 12 Months, Aggregate Losses Accumulated In Investments	1
Available-for-sale Securities, Continuous Unrealized Loss Position 12 Months Or Longer, Aggregate Losses Accumulated In Investments	20
Available-for-sale Securities, Continuous Unrealized Loss Position Aggregate Losses Accumulated In Investments	21
Debt Securities [Member]	'
Available-for-sale Securities, Continuous Unrealized Loss Position Less Than 12 Months, Aggregate Losses Accumulated In Investments	27,370
Available-for-sale Securities, Continuous Unrealized Loss Position 12 Months Or Longer, Aggregate Losses Accumulated In Investments	36,893
Available-for-sale Securities, Continuous Unrealized Loss Position Aggregate Losses Accumulated In Investments	64,263
Auction Rate Securities [Member]	'
Available-for-sale Securities, Continuous Unrealized Loss Position Less Than 12 Months, Aggregate Losses Accumulated In Investments	0
Available-for-sale Securities, Continuous Unrealized Loss Position 12 Months Or Longer, Aggregate Losses Accumulated In Investments	11,668
Available-for-sale Securities, Continuous Unrealized Loss Position Aggregate Losses Accumulated In Investments	11,668
Collateralized Mortgage Backed Securities [Member]	'
Available-for-sale Securities, Continuous Unrealized Loss Position Less Than 12 Months, Aggregate Losses Accumulated In Investments	11,881
Available-for-sale Securities, Continuous Unrealized Loss Position 12 Months Or Longer, Aggregate Losses Accumulated In Investments	0
Available-for-sale Securities, Continuous Unrealized Loss Position Aggregate Losses Accumulated In Investments	11,881
Collateralized Mortgage Obligations [Member]	'
Available-for-sale Securities, Continuous Unrealized Loss Position Less Than 12 Months, Aggregate Losses Accumulated In Investments	13,921
Available-for-sale Securities, Continuous Unrealized Loss Position 12 Months Or Longer, Aggregate Losses Accumulated In Investments	18,948
Available-for-sale Securities, Continuous Unrealized Loss Position Aggregate Losses Accumulated In Investments	32,869
Corporate Debt Securities [Member]	'
Available-for-sale Securities, Continuous Unrealized Loss Position Less Than 12 Months, Aggregate Losses Accumulated In Investments	58
Available-for-sale Securities, Continuous Unrealized Loss Position 12 Months Or Longer, Aggregate Losses Accumulated In Investments	6,030
Available-for-sale Securities, Continuous Unrealized Loss Position Aggregate Losses Accumulated In Investments	6,088
Municipal Bonds [Member]	'
Available-for-sale Securities, Continuous Unrealized Loss Position Less Than 12 Months, Aggregate Losses Accumulated In Investments	1,510
Available-for-sale Securities, Continuous Unrealized Loss Position 12 Months Or Longer, Aggregate Losses Accumulated In Investments	246
Available-for-sale Securities, Continuous Unrealized Loss Position Aggregate Losses Accumulated In Investments	$1,756

Investment_Securities_Summary_2

Investment Securities Summary of Amortized Cost and Fair Values of Corporate Debt Securities (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Available-for-sale Securities, Debt Securities	$2,455,464	'
Corporate Debt Securities Issued by Financial Institutions [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available-for-sale Debt Securities, Amortized Cost Basis	97,763	97,883
Available-for-sale Securities, Debt Securities	97,967	96,164
Single-issuer Trust Preferred Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Number of Trust Preferred Securities Below Investment Grade	22	'
Available-for-sale Debt Securities, Amortized Cost Basis	47,502	47,481
Available-for-sale Securities, Debt Securities	41,879	40,531
Subordinated Debt [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available-for-sale Debt Securities, Amortized Cost Basis	47,436	47,405
Available-for-sale Securities, Debt Securities	50,429	50,327
Pooled Trust Preferred Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Number of Trust Preferred Securities Below Investment Grade	8	'
Available-for-sale Debt Securities, Amortized Cost Basis	2,825	2,997
Available-for-sale Securities, Debt Securities	5,659	5,306
Other Corporate Debt Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available-for-sale Debt Securities, Amortized Cost Basis	2,585	2,585
Available-for-sale Securities, Debt Securities	2,585	2,585
Corporate Debt Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available-for-sale Debt Securities, Amortized Cost Basis	100,348	100,468
Available-for-sale Securities, Debt Securities	$100,552	$98,749

Investment_Securities_Narrativ

Investment Securities Narrative (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Statement of Investments [Line Items]	'	'
Amortized cost	$2,519,248,000	$2,608,210,000
Securities Available-for-sale	2,501,198,000	2,568,434,000
SingleBankStockInvestment, cost basis	20,000,000	'
BankStockInvestmentFairValue	27,900,000	'
PercentOwnershipInAnIndividualFinancialInstitution	70.10%	'
IndividualBankStockInvestmentPercenttoTotalPortfolio	5.00%	'
Proceeds from Sale of Available-for-sale Securities	11,900,000	'
Auction Rate Certificates Not Subject To Any Additional Other Than Temporary Impairment Charges Fair Value	147,700,000	'
Available-for-sale Securities, Amortized Cost Basis	2,519,248,000	2,608,210,000
Available-for-sale Securities	2,501,198,000	2,568,434,000
Domestic Corporate debt securities	100,600,000	'
Available-for-sale Securities Pledged as Collateral	1,800,000,000	0
Equity Securities [Member]	'	'
Statement of Investments [Line Items]	'	'
Amortized cost	34,231,000	33,922,000
Securities Available-for-sale	45,734,000	46,201,000
Available-for-sale Securities, Amortized Cost Basis	34,231,000	33,922,000
Available-for-sale Securities	45,734,000	46,201,000
Equity Securities Financial Institution [Member]	'	'
Statement of Investments [Line Items]	'	'
Available-for-sale Securities, Equity Securities	39,800,000	40,600,000
Amortized cost	28,500,000	'
Securities Available-for-sale	39,800,000	'
Available-for-sale Securities, Amortized Cost Basis	28,500,000	'
Available-for-sale Securities	39,800,000	'
Equity Securities, Other [Member]	'	'
Statement of Investments [Line Items]	'	'
Available-for-sale Securities, Equity Securities	5,900,000	5,600,000
Auction Rate Securities [Member]	'	'
Statement of Investments [Line Items]	'	'
Amortized cost	159,379,000	172,299,000
Securities Available-for-sale	147,713,000	159,274,000
Carrying value auction rate securities below investment grade	4,000,000	'
Percentage Auction Rate Securities Below Investment Grade	3.00%	'
US Government Guaranteed student loans below investment grade	3,000,000	'
Percentage US Government guaranteed student loans below investment grade	59.00%	'
US Government Guaranteed student loan auction rate securities	146,000,000	'
US Government Guaranteed student loan auction rate securities percentage	99.00%	'
Available-for-sale Securities, Amortized Cost Basis	159,379,000	172,299,000
Available-for-sale Securities	147,713,000	159,274,000
Pooled Trust Preferred Securities [Member]	'	'
Statement of Investments [Line Items]	'	'
Number of Trust Preferred Securities Below Investment Grade	8	'
Single-issuer Trust Preferred Securities [Member]	'	'
Statement of Investments [Line Items]	'	'
Unrealized Gain (Loss) on Securities	-5,600,000	'
Number of Trust Preferred Securities Below Investment Grade	22	'
Moody's, A2 Rating [Member] | Auction Rate Securities [Member]	'	'
Statement of Investments [Line Items]	'	'
Carrying Value Auction Rate Securities Rated Investment Grade	103,000,000	'
Percentage Auction Rate Securities Investment Grade	70.00%	'
Moody's, A3 Rating [Member] | Auction Rate Securities [Member]	'	'
Statement of Investments [Line Items]	'	'
Carrying Value Auction Rate Securities Rated Investment Grade	6,000,000	'
Percentage Auction Rate Securities Investment Grade	4.00%	'
External Credit Rating, BBB [Member] | Single-issuer Trust Preferred Securities [Member]	'	'
Statement of Investments [Line Items]	'	'
Amortized cost	4,700,000	'
Securities Available-for-sale	3,800,000	'
Available-for-sale Securities, Amortized Cost Basis	4,700,000	'
Available-for-sale Securities	3,800,000	'
External Credit Rating, Rated Above Investment Grade [Member] | Auction Rate Securities [Member]	'	'
Statement of Investments [Line Items]	'	'
Carrying Value Action Rate Securities Above Investment Grade	143,000,000	'
Percentage Action Rate Securities Above Investment Grade	97.00%	'
External Credit Rating, Rated Below Investment Grade [Member] | Pooled Trust Preferred Securities [Member]	'	'
Statement of Investments [Line Items]	'	'
Amortized cost	2,800,000	'
Securities Available-for-sale	5,700,000	'
Available-for-sale Securities, Amortized Cost Basis	2,800,000	'
Available-for-sale Securities	5,700,000	'
External Credit Rating, Rated Below Investment Grade [Member] | Single-issuer Trust Preferred Securities [Member]	'	'
Statement of Investments [Line Items]	'	'
Amortized cost	13,500,000	'
Securities Available-for-sale	11,700,000	'
Number of Trust Preferred Securities Below Investment Grade	6	'
Available-for-sale Securities, Amortized Cost Basis	13,500,000	'
Available-for-sale Securities	$11,700,000	'

Loans_and_Allowance_for_Credit2

Loans and Allowance for Credit Losses Summary Of Gross Loans (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans, gross of unearned income	$12,744,009	$12,792,016	'
Unearned income	-10,217	-9,796	'
Loans, net of unearned income	12,733,792	12,782,220	12,377,288
Real-estate commercial mortage [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans, gross of unearned income	5,137,454	5,101,922	'
Loans, net of unearned income	5,137,454	5,101,922	4,729,930
Commercial - industrial, financial, and agricultural	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans, gross of unearned income	3,574,130	3,628,420	'
Loans, net of unearned income	3,574,130	3,628,420	3,658,483
Real-estate - home equity [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans, gross of unearned income	1,740,496	1,764,197	'
Loans, net of unearned income	1,740,496	1,764,197	1,689,446
Real-estate - residential mortgage [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans, gross of unearned income	1,331,465	1,337,380	'
Loans, net of unearned income	1,331,465	1,337,380	1,303,454
Real-estate - construction	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans, gross of unearned income	584,217	573,672	'
Loans, net of unearned income	584,217	573,672	597,597
Consumer	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans, gross of unearned income	270,021	283,124	'
Loans, net of unearned income	270,021	283,124	309,138
Leasing and other [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans, gross of unearned income	103,192	99,256	'
Overdrafts [Member]	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans, gross of unearned income	$3,034	$4,045	'

Loans_and_Allowance_for_Credit3

Loans and Allowance for Credit Losses Allowance for Credit Losses (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Loans and Leases Receivable, Allowance [Abstract]	'	'	'	'
Loans and Leases Receivable, Allowance	$197,089	$202,780	$220,041	$223,903
Reserve For Unfunded Lending Commitments	1,917	2,137	'	'
Financing Receivable, Allowance for Credit Losses	$199,006	$204,917	$221,527	$225,439

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, 2014	Mar. 31, 2013
Allowance for Loan and Lease Losses [Roll Forward]	'	'
Balance at beginning of period	$204,917	$225,439
Loans charged off	-10,268	-22,106
Recoveries of loans previously charged off	1,857	3,194
Net loans charged off	-8,411	-18,912
Provision for credit losses	2,500	15,000
Balance at end of period	$199,006	$221,527

Loans_and_Allowance_for_Credit5

Loans and Allowance for Credit Losses Allowance for Loan Losses by Portfolio Segment (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013
Beginning Balance	$202,780		$223,903
Loans charged off	-10,268		-22,106
Recoveries of loans previously charged off	1,857		3,194
Net loans charged off	-8,411		-18,912
Provision for loan losses	2,720	[1]	15,050
Ending Balance	197,089		220,041
Real-estate commercial mortage [Member]	'		'
Beginning Balance	55,659		62,928
Loans charged off	-1,386		-4,133
Recoveries of loans previously charged off	44		1,064
Net loans charged off	-1,342		-3,069
Provision for loan losses	-560	[1]	4,126
Ending Balance	53,757		63,985
Commercial - industrial, financial, and agricultural	'		'
Beginning Balance	50,330		60,205
Loans charged off	-5,125		-9,502
Recoveries of loans previously charged off	744		379
Net loans charged off	-4,381		-9,123
Provision for loan losses	4,614	[1]	5,590
Ending Balance	50,563		56,672
Real-estate - home equity [Member]	'		'
Beginning Balance	28,222		22,776
Loans charged off	-1,651		-2,404
Recoveries of loans previously charged off	356		331
Net loans charged off	-1,295		-2,073
Provision for loan losses	5,533	[1]	2,998
Ending Balance	32,460		23,701
Real-estate - residential mortgage [Member]	'		'
Beginning Balance	33,082		34,536
Loans charged off	-846		-3,050
Recoveries of loans previously charged off	116		81
Net loans charged off	-730		-2,969
Provision for loan losses	977	[1]	1,917
Ending Balance	33,329		33,484
Real-estate - construction	'		'
Beginning Balance	12,649		17,287
Loans charged off	-214		-1,986
Recoveries of loans previously charged off	224		671
Net loans charged off	10		-1,315
Provision for loan losses	-2,817	[1]	32
Ending Balance	9,842		16,004
Consumer	'		'
Beginning Balance	3,260		2,367
Loans charged off	-751		-550
Recoveries of loans previously charged off	209		506
Net loans charged off	-542		-44
Provision for loan losses	606	[1]	-37
Ending Balance	3,324		2,286
Leasing and other and overdrafts [Member]	'		'
Beginning Balance	3,370		2,752
Loans charged off	-295		-481
Recoveries of loans previously charged off	164		162
Net loans charged off	-131		-319
Provision for loan losses	-1,228	[1]	354
Ending Balance	2,011		2,787
Unallocated	'		'
Beginning Balance	16,208		21,052
Loans charged off	0		0
Recoveries of loans previously charged off	0		0
Net loans charged off	0		0
Provision for loan losses	-4,405	[1]	70
Ending Balance	$11,803	[2]	$21,122	[2]
[1]	The provision for loan losses excluded a $220,000 decrease in the reserve for unfunded lending commitments for the three months ended MarchB 31, 2014 and excluded a $50,000 decrease in the reserve for unfunded lending commitments for the three months ended MarchB 31, 2013. The total provision for credit losses, comprised of allocations for both funded and unfunded loans, was $2.5 million for the three months ended MarchB 31, 2014 and $15.0 million for the three months ended MarchB 31, 2013.
[2]	The unallocated allowance, which was approximately 6% and 10% of the total allowance for credit losses as of MarchB 31, 2014 and MarchB 31, 2013, 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, 2014		Dec. 31, 2013	Mar. 31, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Allowance for loan losses measured for impairment under FASB ASC Subtopic 450-20	$133,188		'	$139,919		'
Allowance for loan losses evaluated for impairment under FASB ASC Section 310-10-35	63,901		'	80,122		'
Allowance for loan losses	197,089		202,780	220,041		223,903
Loans, net of unearned income, measured for impairment under FASB ASC Subtopic 450-20	12,532,403		'	12,114,733		'
Loans, net of unearned income, evaluated for impairment under FASB ASC Subtopic 310-10-35	201,389		'	262,555		'
Loans, net of unearned income	12,733,792		12,782,220	12,377,288		'
Real-estate commercial mortage [Member]	'		'	'		'
Allowance for loan losses measured for impairment under FASB ASC Subtopic 450-20	37,363		'	40,920		'
Allowance for loan losses evaluated for impairment under FASB ASC Section 310-10-35	16,394		'	23,065		'
Allowance for loan losses	53,757		55,659	63,985		62,928
Loans, net of unearned income, measured for impairment under FASB ASC Subtopic 450-20	5,075,556		'	4,646,355		'
Loans, net of unearned income, evaluated for impairment under FASB ASC Subtopic 310-10-35	61,898		'	83,575		'
Loans, net of unearned income	5,137,454		5,101,922	4,729,930		'
ERROR in label resolution.	'		'	'		'
Allowance for loan losses measured for impairment under FASB ASC Subtopic 450-20	36,859		'	38,988		'
Allowance for loan losses evaluated for impairment under FASB ASC Section 310-10-35	13,704		'	17,684		'
Allowance for loan losses	50,563		50,330	56,672		60,205
Loans, net of unearned income, measured for impairment under FASB ASC Subtopic 450-20	3,528,857		'	3,591,753		'
Loans, net of unearned income, evaluated for impairment under FASB ASC Subtopic 310-10-35	45,273		'	66,730		'
Loans, net of unearned income	3,574,130		3,628,420	3,658,483		'
Home Equity [Member]	'		'	'		'
Allowance for loan losses measured for impairment under FASB ASC Subtopic 450-20	22,969		'	14,947		'
Allowance for loan losses evaluated for impairment under FASB ASC Section 310-10-35	9,491		'	8,754		'
Allowance for loan losses	32,460		28,222	23,701		22,776
Loans, net of unearned income, measured for impairment under FASB ASC Subtopic 450-20	1,726,342		'	1,675,577		'
Loans, net of unearned income, evaluated for impairment under FASB ASC Subtopic 310-10-35	14,154		'	13,869		'
Loans, net of unearned income	1,740,496		1,764,197	1,689,446		'
Real-estate - residential mortgage [Member]	'		'	'		'
Allowance for loan losses measured for impairment under FASB ASC Subtopic 450-20	11,618		'	10,075		'
Allowance for loan losses evaluated for impairment under FASB ASC Section 310-10-35	21,711		'	23,409		'
Allowance for loan losses	33,329		33,082	33,484		34,536
Loans, net of unearned income, measured for impairment under FASB ASC Subtopic 450-20	1,279,783		'	1,247,976		'
Loans, net of unearned income, evaluated for impairment under FASB ASC Subtopic 310-10-35	51,682		'	55,478		'
Loans, net of unearned income	1,331,465		1,337,380	1,303,454		'
Real-estate - construction	'		'	'		'
Allowance for loan losses measured for impairment under FASB ASC Subtopic 450-20	7,256		'	8,838		'
Allowance for loan losses evaluated for impairment under FASB ASC Section 310-10-35	2,586		'	7,166		'
Allowance for loan losses	9,842		12,649	16,004		17,287
Loans, net of unearned income, measured for impairment under FASB ASC Subtopic 450-20	555,852		'	554,757		'
Loans, net of unearned income, evaluated for impairment under FASB ASC Subtopic 310-10-35	28,365		'	42,840		'
Loans, net of unearned income	584,217		573,672	597,597		'
Consumer	'		'	'		'
Allowance for loan losses measured for impairment under FASB ASC Subtopic 450-20	3,309		'	2,271		'
Allowance for loan losses evaluated for impairment under FASB ASC Section 310-10-35	15		'	15		'
Allowance for loan losses	3,324		3,260	2,286		2,367
Loans, net of unearned income, measured for impairment under FASB ASC Subtopic 450-20	270,004		'	309,120		'
Loans, net of unearned income, evaluated for impairment under FASB ASC Subtopic 310-10-35	17		'	18		'
Loans, net of unearned income	270,021		283,124	309,138		'
Leasing and other and overdrafts [Member]	'		'	'		'
Allowance for loan losses measured for impairment under FASB ASC Subtopic 450-20	2,011		'	2,758		'
Allowance for loan losses evaluated for impairment under FASB ASC Section 310-10-35	0		'	29		'
Allowance for loan losses	2,011		3,370	2,787		2,752
Loans, net of unearned income, measured for impairment under FASB ASC Subtopic 450-20	96,009		'	89,195		'
Loans, net of unearned income, evaluated for impairment under FASB ASC Subtopic 310-10-35	0		'	45		'
Loans, net of unearned income	96,009		93,505	89,240		'
Unallocated	'		'	'		'
Allowance for loan losses measured for impairment under FASB ASC Subtopic 450-20	11,803	[1]	'	21,122	[1]	'
Allowance for loan losses	$11,803	[1]	$16,208	$21,122	[1]	$21,052
[1]	The unallocated allowance, which was approximately 6% and 10% of the total allowance for credit losses as of MarchB 31, 2014 and MarchB 31, 2013, 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 Allowance on Sold Loans (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]	'
Unpaid principal balance of loans sold	$13,160
Charge-offs prior to sale	-3,280
Net recorded investment in loans sold	9,880
Proceeds from sale, net of selling expenses	4,640
Total charge-off upon sale	5,240
Existing allocation for credit losses on sold loans	-5,130
Real-estate commercial mortage [Member]	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'
Unpaid principal balance of loans sold	7,690
Charge-offs prior to sale	-2,420
Net recorded investment in loans sold	5,270
Proceeds from sale, net of selling expenses	2,770
Total charge-off upon sale	2,500
Existing allocation for credit losses on sold loans	-2,870
Commercial - industrial, financial, and agricultural	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'
Unpaid principal balance of loans sold	4,730
Charge-offs prior to sale	-710
Net recorded investment in loans sold	4,020
Proceeds from sale, net of selling expenses	1,730
Total charge-off upon sale	2,290
Existing allocation for credit losses on sold loans	-1,960
Real-estate - construction	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'
Unpaid principal balance of loans sold	740
Charge-offs prior to sale	-150
Net recorded investment in loans sold	590
Proceeds from sale, net of selling expenses	140
Total charge-off upon sale	450
Existing allocation for credit losses on sold loans	($300)

Loans_and_Allowance_for_Credit8

Loans and Allowance for Credit Losses Total Impaired Loans by Class Segments (Details) (USD $)

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Real-estate commercial mortage [Member]

Real-estate commercial mortage [Member]

Commercial - Secured [Member]

Commercial - Secured [Member]

Commercial - unsecured [Member]

Commercial - unsecured [Member]

Real-estate - home equity [Member]

Real-estate - home equity [Member]

Real-estate - residential mortgage [Member]

Real-estate - residential mortgage [Member]

Construction - commercial residential [Member]

Construction - commercial residential [Member]

Construction - Commercial [Member]

Construction - Commercial [Member]

Construction other [Member]

Construction other [Member]

Consumer - direct [Member]

Consumer - direct [Member]

Consumer - Indirect [Member]

Consumer - Indirect [Member]

Nonperforming Financing Receivable [Member]

Impaired Financing Receivables [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Impaired Loans Balances, Real Estate as Collateral

$1,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Financing Receivable, Recorded Investment, Days Outstanding

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

90

Unpaid principal balance, with no related allowance

81,478,000

75,120,000

27,433,000

28,892,000

23,862,000

23,890,000

'

'

399,000

399,000

317,000

0

26,475,000

18,943,000

2,992,000

2,996,000

'

'

'

'

'

'

'

Unpaid principal balance, with related allowance

182,147,000

189,713,000

47,010,000

43,282,000

36,309,000

34,267,000

693,000

1,113,000

19,420,000

20,383,000

61,733,000

63,682,000

15,753,000

25,769,000

481,000

485,000

718,000

719,000

15,000

11,000

15,000

2,000

'

Unpaid Principal Balance

263,625,000

264,833,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Recorded investment, with no related allowance

67,642,000

61,893,000

23,491,000

24,494,000

20,867,000

21,383,000

'

'

300,000

300,000

317,000

0

20,705,000

13,740,000

1,962,000

1,976,000

'

'

'

'

'

'

'

Recorded investment, with related allowance

133,747,000

139,971,000

38,407,000

35,830,000

23,765,000

22,324,000

641,000

1,048,000

13,854,000

14,337,000

51,365,000

51,097,000

4,963,000

14,579,000

191,000

195,000

544,000

548,000

15,000

11,000

2,000

2,000

'

Recorded Investment

201,389,000

201,864,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Related Allowance

$63,901,000

$63,198,000

$16,394,000

$14,444,000

$13,232,000

$13,315,000

$472,000

$752,000

$9,491,000

$9,059,000

$21,711,000

$21,745,000

$2,212,000

$3,493,000

$76,000

$77,000

$298,000

$301,000

$13,000

$10,000

$2,000

$2,000

'

Loans_and_Allowance_for_Credit9

Loans and Allowance for Credit Losses Average Impaired Loans by Class Segment (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013
Financing Receivable, Impaired [Line Items]	'		'
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	$64,769		$92,444
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	182	[1]	272	[1]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	136,861		174,008
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	520	[1]	667	[1]
Impaired Financing Receivable, Average Recorded Investment	201,630		266,452
Impaired Financing Receivable, Interest Income, Accrual Method	702	[1]	939	[1]
Real-estate commercial mortage [Member]	'		'
Financing Receivable, Impaired [Line Items]	'		'
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	23,993		32,140
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	86	[1]	160	[1]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	37,119		54,464
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	132	[1]	221	[1]
Commercial - Secured [Member]	'		'
Financing Receivable, Impaired [Line Items]	'		'
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	21,125		31,413
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	35	[1]	34	[1]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	23,045		35,864
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	38	[1]	43	[1]
Commercial - unsecured [Member]	'		'
Financing Receivable, Impaired [Line Items]	'		'
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	0		66
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	0	[1]	0	[1]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	845		1,743
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	1	[1]	2	[1]
Real-estate - home equity [Member]	'		'
Financing Receivable, Impaired [Line Items]	'		'
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	300		205
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	0	[1]	1	[1]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	14,096		13,301
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	20	[1]	16	[1]
Real-estate - residential mortgage [Member]	'		'
Financing Receivable, Impaired [Line Items]	'		'
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	159		991
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	1	[1]	12	[1]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	51,231		53,797
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	294	[1]	339	[1]
Construction - Commercial Residential [Member]	'		'
Financing Receivable, Impaired [Line Items]	'		'
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	17,223		22,650
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	60	[1]	63	[1]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	9,771		11,496
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	35	[1]	42	[1]
Construction - Commercial [Member]	'		'
Financing Receivable, Impaired [Line Items]	'		'
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	1,969		4,979
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	0	[1]	2	[1]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	193		2,758
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	0	[1]	3	[1]
Construction other [Member]	'		'
Financing Receivable, Impaired [Line Items]	'		'
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	546		533
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	0	[1]	1	[1]
Consumer - direct [Member]	'		'
Financing Receivable, Impaired [Line Items]	'		'
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	13		24
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	2		0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	0	[1]	0	[1]
Leasing and other and overdrafts [Member]	'		'
Financing Receivable, Impaired [Line Items]	'		'
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	0		28
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 MarchB 31, 2014 and 2013 represents amounts earned on accruing TDRs.

Recovered_Sheet1

Loans and Allowance for Credit Losses Credit Quality Indicators (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	$12,744,009	$12,792,016
Commercial Loans, Commerical Mortgages, Constructions Loans [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	9,224,221	9,235,208
Percentage of total loans rated	100.00%	100.00%
Real-estate commercial mortage [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	5,137,454	5,101,922
Commercial - industrial, financial, and agricultural	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	3,574,130	3,628,420
Commercial - Secured [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	3,375,041	3,404,163
Commercial - Unsecured [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	199,089	224,257
Construction, Excluding Contstruction Other [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	512,637	504,866
Construction - Commercial Residential [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	229,541	235,369
Construction - Commercial [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	283,096	269,497
Pass [Member] | Commercial Loans, Commerical Mortgages, Constructions Loans [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	8,554,787	8,545,473
Percentage of total loans rated	92.70%	92.60%
Pass [Member] | Real-estate commercial mortage [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	4,833,982	4,763,987
Pass [Member] | Commercial - industrial, financial, and agricultural	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	3,293,273	3,377,004
Pass [Member] | Commercial - Secured [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	3,109,539	3,167,168
Pass [Member] | Commercial - Unsecured [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	183,734	209,836
Pass [Member] | Construction, Excluding Contstruction Other [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	427,532	404,482
Pass [Member] | Construction - Commercial Residential [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	153,495	146,041
Pass [Member] | Construction - Commercial [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	274,037	258,441
Special Mention [Member] | Commercial Loans, Commerical Mortgages, Constructions Loans [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	302,945	298,746
Percentage of total loans rated	3.30%	3.20%
Special Mention [Member] | Real-estate commercial mortage [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	122,929	141,013
Special Mention [Member] | Commercial - industrial, financial, and agricultural	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	147,545	123,279
Special Mention [Member] | Commercial - Secured [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	137,176	111,613
Special Mention [Member] | Commercial - Unsecured [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	10,369	11,666
Special Mention [Member] | Construction, Excluding Contstruction Other [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	32,471	34,454
Special Mention [Member] | Construction - Commercial Residential [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	29,556	31,522
Special Mention [Member] | Construction - Commercial [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	2,915	2,932
Substandard [Member] | Commercial Loans, Commerical Mortgages, Constructions Loans [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	366,489	390,989
Percentage of total loans rated	4.00%	4.20%
Substandard [Member] | Real-estate commercial mortage [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	180,543	196,922
Substandard [Member] | Commercial - industrial, financial, and agricultural	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	133,312	128,137
Substandard [Member] | Commercial - Secured [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	128,326	125,382
Substandard [Member] | Commercial - Unsecured [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	4,986	2,755
Substandard [Member] | Construction, Excluding Contstruction Other [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	52,634	65,930
Substandard [Member] | Construction - Commercial Residential [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	46,490	57,806
Substandard [Member] | Construction - Commercial [Member]	'	'
Internal risk ratings for loans by segment [Line Items]	'	'
Loans, gross of unearned income	$6,144	$8,124

Recovered_Sheet2

Loans and Allowance for Credit Losses Summary of Delinquency and Non-Performing Status by Portfolio Segment (Details) (USD $)

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2013

Mar. 31, 2014

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

In Thousands, unless otherwise specified

Commercial - Unsecured [Member]

Commercial - Unsecured [Member]

Commercial Loans, Commerical Mortgages, Constructions Loans [Member]

Commercial Loans, Commerical Mortgages, Constructions Loans [Member]

Real-estate - home equity [Member]

Real-estate - home equity [Member]

Real-estate - home equity [Member]

Real-estate - residential mortgage [Member]

Real-estate - residential mortgage [Member]

Real-estate - residential mortgage [Member]

Construction other [Member]

Construction other [Member]

Total Consumer

Total Consumer

Total Consumer

Consumer - direct [Member]

Consumer - direct [Member]

Consumer - Indirect [Member]

Consumer - Indirect [Member]

Leasing and other and overdrafts [Member]

Leasing and other and overdrafts [Member]

Leasing and other and overdrafts [Member]

Nonperforming Financing Receivable [Member]

Nonperforming Financing Receivable [Member]

Nonperforming Financing Receivable [Member]

Nonperforming Financing Receivable [Member]

Nonperforming Financing Receivable [Member]

Nonperforming Financing Receivable [Member]

Nonperforming Financing Receivable [Member]

Nonperforming Financing Receivable [Member]

Nonperforming Financing Receivable [Member]

Nonperforming Financing Receivable [Member]

Nonperforming Financing Receivable [Member]

Nonperforming Financing Receivable [Member]

Nonperforming Financing Receivable [Member]

Nonperforming Financing Receivable [Member]

Nonperforming Financing Receivable [Member]

Nonperforming Financing Receivable [Member]

Nonperforming Financing Receivable [Member]

Performing Financing Receivable [Member]

Performing Financing Receivable [Member]

Performing Financing Receivable [Member]

Performing Financing Receivable [Member]

Performing Financing Receivable [Member]

Performing Financing Receivable [Member]

Performing Financing Receivable [Member]

Performing Financing Receivable [Member]

Performing Financing Receivable [Member]

Performing Financing Receivable [Member]

Performing Financing Receivable [Member]

Performing Financing Receivable [Member]

Performing Financing Receivable [Member]

Performing Financing Receivable [Member]

Performing Financing Receivable [Member]

Performing Financing Receivable [Member]

Commercial Loans, Commerical Mortgages, Constructions Loans [Member]

Commercial Loans, Commerical Mortgages, Constructions Loans [Member]

Real-estate - home equity [Member]

Real-estate - home equity [Member]

Real-estate - residential mortgage [Member]

Real-estate - residential mortgage [Member]

Construction other [Member]

Construction other [Member]

Total Consumer

Total Consumer

Consumer - direct [Member]

Consumer - direct [Member]

Consumer - Indirect [Member]

Consumer - Indirect [Member]

Leasing and other and overdrafts [Member]

Leasing and other and overdrafts [Member]

Commercial Loans, Commerical Mortgages, Constructions Loans [Member]

Commercial Loans, Commerical Mortgages, Constructions Loans [Member]

Real-estate - home equity [Member]

Real-estate - home equity [Member]

Real-estate - residential mortgage [Member]

Real-estate - residential mortgage [Member]

Construction other [Member]

Construction other [Member]

Total Consumer

Total Consumer

Consumer - direct [Member]

Consumer - direct [Member]

Consumer - Indirect [Member]

Consumer - Indirect [Member]

Leasing and other and overdrafts [Member]

Leasing and other and overdrafts [Member]

Financing Receivable, Impaired [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Financing Receivable, Recorded Investment, Days Outstanding

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

90

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Loans and Leases Receivable, Net of Deferred Income

$12,733,792

$12,782,220

$12,377,288

$199,089

$224,257

$3,509,571

$3,547,012

$1,740,496

$1,764,197

$1,689,446

$1,331,465

$1,337,380

$1,303,454

$71,580

$68,806

$270,021

$283,124

$309,138

$123,254

$132,643

$146,767

$150,481

$96,009

$93,505

$89,240

'

$50,010

$51,469

$17,088

$16,983

$29,305

$31,347

$544

$548

$2,999

$2,543

$2,872

$2,391

$127

$152

$74

$48

$3,419,489

$3,448,756

$1,711,430

$1,731,185

$1,281,854

$1,282,754

$70,096

$68,258

$260,968

$273,683

$116,748

$126,666

$144,220

$147,017

$95,141

$92,876

Loans And Leases Receivable Percentage Of Loans Within Delinquecy Category By Total Non Risk Rated Loans

'

'

'

'

'

100.00%

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.40%

1.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

97.40%

97.20%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Recovered_Sheet3

Loans and Allowance for Credit Losses Non-Performing Assets (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Receivables [Abstract]	'	'
Non-accrual loans	$133,705	$133,753
Accruing loans greater than 90 days past due	21,225	20,524
Total non-performing loans	154,930	154,277
Other real estate owned (OREO)	15,300	15,052
Total non-performing assets	$170,230	$169,329

Recovered_Sheet4

Loans and Allowance for Credit Losses Loans Modified Under Troubled Debt Restructurings (Details) (USD $)	Mar. 31, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Modifications [Line Items]	'		'
Total accruing TDRs	$67,684		$68,111
Non-accrual TDRs	27,487	[1]	30,209	[1]
Total TDRs	95,171		98,320
Real-estate - residential mortgage [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Total accruing TDRs	30,363		28,815
Real-estate commercial mortage [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Total accruing TDRs	19,514		19,758
Commercial - Secured [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Total accruing TDRs	6,674		7,933
Construction - Commercial Residential [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Total accruing TDRs	8,430		10,117
Home Equity [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Total accruing TDRs	2,606		1,365
Commercial - unsecured [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Total accruing TDRs	81		112
Consumer Other Financing Receivable [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Total accruing TDRs	$1		$0
[1]	Included within non-accrual loans in the preceding table detailing non-performing assets.

Recovered_Sheet5

Loans and Allowance for Credit Losses Troubled Debt Restructuring Modification (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
	loans	loans
Financing Receivable, Modifications [Line Items]	'	'
Number of loans modified as TDRs during the reporting periods	31	58
Recorded investment of loans modified as TDRs during the reporting periods	$9,258	$8,898
Number of loans modified as TDRs within the previous 12 months which had a payment default during the reporting period	31	74
Recorded investment of loans modified as TDRs within the previous 12 months which had a payment default during the reporting period	4,710	16,921
Real-estate commercial mortage [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of loans modified as TDRs during the reporting periods	7	5
Recorded investment of loans modified as TDRs during the reporting periods	7,470	2,652
Number of loans modified as TDRs within the previous 12 months which had a payment default during the reporting period	3	12
Recorded investment of loans modified as TDRs within the previous 12 months which had a payment default during the reporting period	126	6,893
Real-estate - residential mortgage [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of loans modified as TDRs during the reporting periods	6	28
Recorded investment of loans modified as TDRs during the reporting periods	706	3,966
Number of loans modified as TDRs within the previous 12 months which had a payment default during the reporting period	12	31
Recorded investment of loans modified as TDRs within the previous 12 months which had a payment default during the reporting period	2,522	5,849
Construction - commercial residential [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of loans modified as TDRs during the reporting periods	1	2
Recorded investment of loans modified as TDRs during the reporting periods	548	628
Real-estate - home equity [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of loans modified as TDRs during the reporting periods	10	17
Recorded investment of loans modified as TDRs during the reporting periods	529	1,180
Number of loans modified as TDRs within the previous 12 months which had a payment default during the reporting period	14	20
Recorded investment of loans modified as TDRs within the previous 12 months which had a payment default during the reporting period	1,432	1,233
Commercial - Secured [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of loans modified as TDRs during the reporting periods	0	5
Recorded investment of loans modified as TDRs during the reporting periods	0	457
Number of loans modified as TDRs within the previous 12 months which had a payment default during the reporting period	1	6
Recorded investment of loans modified as TDRs within the previous 12 months which had a payment default during the reporting period	11	708
Commercial - unsecured [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of loans modified as TDRs during the reporting periods	0	1
Recorded investment of loans modified as TDRs during the reporting periods	0	15
Construction - Commercial [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of loans modified as TDRs within the previous 12 months which had a payment default during the reporting period	0	1
Recorded investment of loans modified as TDRs within the previous 12 months which had a payment default during the reporting period	0	930
Consumer - direct [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of loans modified as TDRs during the reporting periods	4	0
Recorded investment of loans modified as TDRs during the reporting periods	4	0
Consumer - Indirect [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of loans modified as TDRs during the reporting periods	3	0
Recorded investment of loans modified as TDRs during the reporting periods	$1	$0

Recovered_Sheet6

Loans and Allowance for Credit Losses Past Due Loan Status and Non-Accrual Loans by Portfolio Segment (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
In Thousands, unless otherwise specified
31-59 Days Past Due	$54,071	$60,774	'
60-89 Days Past Due	17,339	16,893	'
>90 Days Past Due and Accruing	21,225	20,524	'
Non-accrual	133,705	133,753	'
Total >90 Days	154,930	154,277	'
Total Past Due	226,340	231,944	'
Current	12,507,452	12,550,276	'
Loans, net of unearned income	12,733,792	12,782,220	12,377,288
Real-estate commercial mortage [Member]	'	'	'
31-59 Days Past Due	13,290	15,474	'
60-89 Days Past Due	4,633	4,009	'
>90 Days Past Due and Accruing	3,492	3,502	'
Non-accrual	42,384	40,566	'
Total >90 Days	45,876	44,068	'
Total Past Due	63,799	63,551	'
Current	5,073,655	5,038,371	'
Loans, net of unearned income	5,137,454	5,101,922	4,729,930
Commercial - industrial, financial, and agricultural	'	'	'
31-59 Days Past Due	9,674	9,248	'
60-89 Days Past Due	2,161	1,490	'
>90 Days Past Due and Accruing	312	1,311	'
Non-accrual	38,518	36,710	'
Total >90 Days	38,830	38,021	'
Total Past Due	50,665	48,759	'
Current	3,523,465	3,579,661	'
Loans, net of unearned income	3,574,130	3,628,420	3,658,483
Commercial - Secured [Member]	'	'	'
31-59 Days Past Due	9,370	8,916	'
60-89 Days Past Due	1,886	1,365	'
>90 Days Past Due and Accruing	308	1,311	'
Non-accrual	37,958	35,774	'
Total >90 Days	38,266	37,085	'
Total Past Due	49,522	47,366	'
Current	3,325,519	3,356,797	'
Loans, net of unearned income	3,375,041	3,404,163	'
Commercial - unsecured [Member]	'	'	'
31-59 Days Past Due	304	332	'
60-89 Days Past Due	275	125	'
>90 Days Past Due and Accruing	4	0	'
Non-accrual	560	936	'
Total >90 Days	564	936	'
Total Past Due	1,143	1,393	'
Current	197,946	222,864	'
Loans, net of unearned income	199,089	224,257	'
Real-estate - home equity [Member]	'	'	'
31-59 Days Past Due	9,347	13,555	'
60-89 Days Past Due	2,631	2,474	'
>90 Days Past Due and Accruing	5,540	3,711	'
Non-accrual	11,548	13,272	'
Total >90 Days	17,088	16,983	'
Total Past Due	29,066	33,012	'
Current	1,711,430	1,731,185	'
Loans, net of unearned income	1,740,496	1,764,197	1,689,446
Real-estate - residential mortgage [Member]	'	'	'
31-59 Days Past Due	14,682	16,969	'
60-89 Days Past Due	5,624	6,310	'
>90 Days Past Due and Accruing	7,986	9,065	'
Non-accrual	21,319	22,282	'
Total >90 Days	29,305	31,347	'
Total Past Due	49,611	54,626	'
Current	1,281,854	1,282,754	'
Loans, net of unearned income	1,331,465	1,337,380	1,303,454
Construction other [Member]	'	'	'
31-59 Days Past Due	940	0	'
60-89 Days Past Due	0	0	'
>90 Days Past Due and Accruing	0	0	'
Non-accrual	544	548	'
Total >90 Days	544	548	'
Total Past Due	1,484	548	'
Current	70,096	68,258	'
Loans, net of unearned income	71,580	68,806	'
Real-estate - construction	'	'	'
31-59 Days Past Due	2,292	14	'
60-89 Days Past Due	228	645	'
>90 Days Past Due and Accruing	823	346	'
Non-accrual	19,935	20,921	'
Total >90 Days	20,758	21,267	'
Total Past Due	23,278	21,926	'
Current	560,939	551,746	'
Loans, net of unearned income	584,217	573,672	597,597
Construction - Commercial Residential [Member]	'	'	'
31-59 Days Past Due	1,352	0	'
60-89 Days Past Due	228	645	'
>90 Days Past Due and Accruing	796	346	'
Non-accrual	17,238	18,202	'
Total >90 Days	18,034	18,548	'
Total Past Due	19,614	19,193	'
Current	209,927	216,176	'
Loans, net of unearned income	229,541	235,369	'
Construction - Commercial [Member]	'	'	'
31-59 Days Past Due	0	14	'
60-89 Days Past Due	0	0	'
>90 Days Past Due and Accruing	27	0	'
Non-accrual	2,153	2,171	'
Total >90 Days	2,180	2,171	'
Total Past Due	2,180	2,185	'
Current	280,916	267,312	'
Loans, net of unearned income	283,096	269,497	'
Total Consumer	'	'	'
31-59 Days Past Due	4,455	4,955	'
60-89 Days Past Due	1,599	1,943	'
>90 Days Past Due and Accruing	2,998	2,541	'
Non-accrual	1	2	'
Total >90 Days	2,999	2,543	'
Total Past Due	9,053	9,441	'
Current	260,968	273,683	'
Loans, net of unearned income	270,021	283,124	309,138
Consumer - direct [Member]	'	'	'
31-59 Days Past Due	2,495	2,091	'
60-89 Days Past Due	1,139	1,495	'
>90 Days Past Due and Accruing	2,872	2,391	'
Non-accrual	0	0	'
Total >90 Days	2,872	2,391	'
Total Past Due	6,506	5,977	'
Current	116,748	126,666	'
Loans, net of unearned income	123,254	132,643	'
Consumer - Indirect [Member]	'	'	'
31-59 Days Past Due	1,960	2,864	'
60-89 Days Past Due	460	448	'
>90 Days Past Due and Accruing	126	150	'
Non-accrual	1	2	'
Total >90 Days	127	152	'
Total Past Due	2,547	3,464	'
Current	144,220	147,017	'
Loans, net of unearned income	146,767	150,481	'
Leasing and other and overdrafts [Member]	'	'	'
31-59 Days Past Due	331	559	'
60-89 Days Past Due	463	22	'
>90 Days Past Due and Accruing	74	48	'
Non-accrual	0	0	'
Total >90 Days	74	48	'
Total Past Due	868	629	'
Current	95,141	92,876	'
Loans, net of unearned income	96,009	93,505	89,240
Commercial Loans, Commerical Mortgages, Constructions Loans [Member]	'	'	'
Loans, net of unearned income	3,509,571	3,547,012	'
Loans And Leases Receivable Percentage Of Loans Within Delinquecy Category By Total Non Risk Rated Loans	100.00%	100.00%	'
Delinquent [Member] | Real-estate - home equity [Member]	'	'	'
Loans, net of unearned income	11,978	16,029	'
Delinquent [Member] | Real-estate - residential mortgage [Member]	'	'	'
Loans, net of unearned income	20,306	23,279	'
Delinquent [Member] | Construction other [Member]	'	'	'
Loans, net of unearned income	940	0	'
Delinquent [Member] | Total Consumer	'	'	'
Loans, net of unearned income	6,054	6,898	'
Delinquent [Member] | Consumer - direct [Member]	'	'	'
Loans, net of unearned income	3,634	3,586	'
Delinquent [Member] | Consumer - Indirect [Member]	'	'	'
Loans, net of unearned income	2,420	3,312	'
Delinquent [Member] | Leasing and other and overdrafts [Member]	'	'	'
Loans, net of unearned income	794	581	'
Delinquent [Member] | Commercial Loans, Commerical Mortgages, Constructions Loans [Member]	'	'	'
Loans, net of unearned income	40,072	46,787	'
Loans And Leases Receivable Percentage Of Loans Within Delinquecy Category By Total Non Risk Rated Loans	1.20%	1.30%	'
Nonperforming Financing Receivable [Member] | Real-estate - home equity [Member]	'	'	'
Loans, net of unearned income	17,088	16,983	'
Nonperforming Financing Receivable [Member] | Real-estate - residential mortgage [Member]	'	'	'
Loans, net of unearned income	29,305	31,347	'
Nonperforming Financing Receivable [Member] | Construction other [Member]	'	'	'
Loans, net of unearned income	544	548	'
Nonperforming Financing Receivable [Member] | Total Consumer	'	'	'
Loans, net of unearned income	2,999	2,543	'
Nonperforming Financing Receivable [Member] | Consumer - direct [Member]	'	'	'
Loans, net of unearned income	2,872	2,391	'
Nonperforming Financing Receivable [Member] | Consumer - Indirect [Member]	'	'	'
Loans, net of unearned income	127	152	'
Nonperforming Financing Receivable [Member] | Leasing and other and overdrafts [Member]	'	'	'
Loans, net of unearned income	74	48	'
Nonperforming Financing Receivable [Member] | Commercial Loans, Commerical Mortgages, Constructions Loans [Member]	'	'	'
Loans, net of unearned income	50,010	51,469	'
Loans And Leases Receivable Percentage Of Loans Within Delinquecy Category By Total Non Risk Rated Loans	1.40%	1.50%	'
Performing Financing Receivable [Member] | Real-estate - home equity [Member]	'	'	'
Loans, net of unearned income	1,711,430	1,731,185	'
Performing Financing Receivable [Member] | Real-estate - residential mortgage [Member]	'	'	'
Loans, net of unearned income	1,281,854	1,282,754	'
Performing Financing Receivable [Member] | Construction other [Member]	'	'	'
Loans, net of unearned income	70,096	68,258	'
Performing Financing Receivable [Member] | Total Consumer	'	'	'
Loans, net of unearned income	260,968	273,683	'
Performing Financing Receivable [Member] | Consumer - direct [Member]	'	'	'
Loans, net of unearned income	116,748	126,666	'
Performing Financing Receivable [Member] | Consumer - Indirect [Member]	'	'	'
Loans, net of unearned income	144,220	147,017	'
Performing Financing Receivable [Member] | Leasing and other and overdrafts [Member]	'	'	'
Loans, net of unearned income	95,141	92,876	'
Performing Financing Receivable [Member] | Commercial Loans, Commerical Mortgages, Constructions Loans [Member]	'	'	'
Loans, net of unearned income	$3,419,489	$3,448,756	'
Loans And Leases Receivable Percentage Of Loans Within Delinquecy Category By Total Non Risk Rated Loans	97.40%	97.20%	'

Recovered_Sheet7

Loans and Allowance for Credit Losses Narrative (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Provision for loan losses gross	$200,000	$50,000	'
Provision for credit losses	2,500,000	15,000,000	'
Percentage of unallocated allowance	6.00%	10.00%	'
Recorded Investment, Loans Sold	'	9,880,000	'
Charge-offs Upon Sale, Loan Sold	'	5,240,000	'
Minimum balance of loans evaluated individually for impairment	1,000,000	'	'
Impaired loans with principal balances approximately in percentage	79.00%	73.00%	'
Impaired loans balances, real estate as collateral	1,000,000	'	'
Loan to value ratio in the Corporation's policy	70.00%	'	'
Recorded investment, with no related allowance	67,642,000	'	61,893,000
TDR additional commitments to lend	$5,200,000	'	$9,600,000
Delinquent [Member] | Minimum [Member]	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Days past due	31	'	'
Delinquent [Member] | Maximum [Member]	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Days past due	89	'	'
Non-performing [Member]	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'
Days past due	90	'	'

Recovered_Sheet8

Loans and Allowance for Credit Losses Allocation for Credit Losses on Loans Sold (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Unpaid principal balance of loans sold	$13,160
Charge-offs prior to sale	-3,280
Net recorded investment in loans sold	9,880
Proceeds from sale, net of selling expenses	4,640
Total charge-off upon sale	5,240
Existing allocation for credit losses on sold loans	-5,130
Commercial - industrial, financial, and agricultural	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Unpaid principal balance of loans sold	4,730
Charge-offs prior to sale	-710
Net recorded investment in loans sold	4,020
Proceeds from sale, net of selling expenses	1,730
Total charge-off upon sale	2,290
Existing allocation for credit losses on sold loans	-1,960
Real-estate - construction	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Unpaid principal balance of loans sold	740
Charge-offs prior to sale	-150
Net recorded investment in loans sold	590
Proceeds from sale, net of selling expenses	140
Total charge-off upon sale	450
Existing allocation for credit losses on sold loans	-300
Real-estate commercial mortage [Member]	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Unpaid principal balance of loans sold	7,690
Charge-offs prior to sale	-2,420
Net recorded investment in loans sold	5,270
Proceeds from sale, net of selling expenses	2,770
Total charge-off upon sale	2,500
Existing allocation for credit losses on sold loans	($2,870)

Mortgage_Servicing_Rights_Summ

Mortgage Servicing Rights Summary of Changes in Mortgage Servicing Rights (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Valuation Allowance:	'	'
Mortgage Servicing Rights (MSR) Impairment (Recovery)	'	($2,130,000)
Servicing Asset at Fair Value, Amount	48,200,000	'
Residential Mortgage [Member]	'	'
Amortized Cost:	'	'
Balance at beginning of period	42,452,000	39,737,000
Originations of mortgage servicing rights	1,115,000	4,227,000
Amortization	-1,899,000	-2,958,000
Balance at end of period	41,668,000	41,006,000
Valuation Allowance:	'	'
Valuation Allowance	0	-3,680,000
Net MSRs at end of period	$41,668,000	$37,326,000

StockBased_Compensation_Compen

Stock-Based Compensation Compensation Expense and Related Tax Benefits (Details) (USD $)	3 Months Ended		0 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Apr. 01, 2014	Apr. 01, 2014
			Restricted Stock Units (RSUs) [Member]	Employee Stock Option [Member]
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	'	'	96,000	289,000
Stock-based compensation expense	$1,033	$847	'	'
Tax benefit	-263	-224	'	'
Stock-based compensation expense, net of tax	$770	$623	'	'

StockBased_Compensation_Narrat

Stock-Based Compensation Narrative (Details)	3 Months Ended		3 Months Ended	0 Months Ended
	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2014	Apr. 01, 2014	Apr. 01, 2014	Apr. 01, 2014
		Directors' Plan [Member]	Employee Stock Option [Member]	Performance Shares [Member]	Restricted Stock Units (RSUs) [Member]	Employee Stock Option [Member]
Statement [Line Items]	'	'	'	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award Options Expiration Term	'10 years	'	'	'	'	'
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	'	438,000	11,000,000	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	'	'	'	389,000	96,000	289,000

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, 2014		Mar. 31, 2013
Pension Plan [Member]	'	'		'
Define Benefit Plan Disclosure [Line Items]	'	'		'
Service cost	'	$92,000	[1]	$51,000	[1]
Interest cost	'	853,000		772,000
Expected return on plan assets	'	-811,000		-800,000
Net amortization and deferral	'	244,000		596,000
Net periodic benefit cost	'	378,000		619,000
Postretirement Plan [Member]	'	'		'
Define Benefit Plan Disclosure [Line Items]	'	'		'
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments	1,500,000	'		'
Defined Benefit Plan, Curtailments	'	3,300,000		'
Service cost	'	15,000		57,000
Interest cost	'	61,000		81,000
Expected return on plan assets	'	0		0
Net accretion and deferral	'	-95,000		-91,000
Net periodic benefit cost	'	($19,000)		$47,000
[1]	The Pension Plan service cost recorded for the three months ended MarchB 31, 2014 and 2013, respectively, was related to administrative costs associated with the plan and was not due to the accrual of additional participant benefits.

Derivative_Financial_Instrumen2

Derivative Financial Instruments Notional Amounts and Fair Values of Derivative Financial Instruments (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Foreign Currency Open Position	$500,000	'
Derivative, Fair Value, Net	1,012	2,197
Negative Fair Values [Member]	'	'
Asset (Liability) Fair Value	-3,317	888
Interest Rate Lock Commitments [Member]	'	'
Asset (Liability) Fair Value	1,197	808
Interest Rate Lock Commitments [Member] | Positive Fair Values [Member]	'	'
Asset, Fair Value	1,202	867
Derivative, Notional Amount	91,145	75,217
Interest Rate Lock Commitments [Member] | Negative Fair Values [Member]	'	'
Derivative, Notional Amount	1,258	11,393
Liability, Fair Value	-5	-59
Forward Commitments [Member]	'	'
Asset (Liability) Fair Value	-240	1,258
Forward Commitments [Member] | Positive Fair Values [Member]	'	'
Asset, Fair Value	2	1,263
Derivative, Notional Amount	4,904	87,904
Forward Commitments [Member] | Negative Fair Values [Member]	'	'
Derivative, Notional Amount	95,750	2,373
Liability, Fair Value	-242	-5
InterestRateSwapWithCustomer [Domain]	'	'
Asset (Liability) Fair Value	3,317	-888
InterestRateSwapWithCustomer [Domain] | Positive Fair Values [Member]	'	'
Asset, Fair Value	4,955	2,105
Derivative, Notional Amount	228,588	111,899
InterestRateSwapWithCustomer [Domain] | Negative Fair Values [Member]	'	'
Derivative, Notional Amount	81,163	105,673
Liability, Fair Value	-1,638	-2,993
InterestRateSwapWithCounterparty [Domain] | Positive Fair Values [Member]	'	'
Asset, Fair Value	1,638	2,993
Derivative, Notional Amount	81,163	105,673
InterestRateSwapWithCounterparty [Domain] | Negative Fair Values [Member]	'	'
Derivative, Notional Amount	228,588	111,899
Liability, Fair Value	-4,955	-2,105
ForeignCurrencyForwardWithCustomer [Domain]	'	'
Foreign Currency Derivatives at Fair Value, Net	-127	-319
ForeignCurrencyForwardWithCustomer [Domain] | Positive Fair Values [Member]	'	'
Derivative, Notional Amount	9,927	2,150
Foreign Currency Contract, Asset, Fair Value Disclosure	56	24
ForeignCurrencyForwardWithCustomer [Domain] | Negative Fair Values [Member]	'	'
Derivative, Notional Amount	9,965	12,775
Foreign Currency Contracts, Liability, Fair Value Disclosure	-183	-343
ForeignCurrencyForwardWithCorrespondentBanks [Domain]	'	'
Foreign Currency Derivatives at Fair Value, Net	182	450
ForeignCurrencyForwardWithCorrespondentBanks [Domain] | Positive Fair Values [Member]	'	'
Derivative, Notional Amount	15,036	17,348
Foreign Currency Contract, Asset, Fair Value Disclosure	198	498
ForeignCurrencyForwardWithCorrespondentBanks [Domain] | Negative Fair Values [Member]	'	'
Derivative, Notional Amount	4,466	5,872
Foreign Currency Contracts, Liability, Fair Value Disclosure	($16)	($48)

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, 2014	Mar. 31, 2013
Mortgage Banking Income [Member] | Interest rate lock with customers [Member]	'	'
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments	$389	($2,538)
Mortgage Banking Income [Member] | Forward Commitments [Member]	'	'
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments	-1,498	428
Other Income [Member]	'	'
Derivative Instruments, Gain (Loss) Recognized in Income, Net	-1,185	-1,232
Other Income [Member] | InterestRateSwapWithCustomer [Domain]	'	'
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments	4,205	-408
Other Income [Member] | Interest Rate Swap [Member]	'	'
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments	-4,205	408
Other Income [Member] | ForeignCurrencyForwardWithCustomer [Domain]	'	'
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net	192	460
Other Income [Member] | ForeignCurrencyForwardWithCustomer [Domain]	'	'
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net	($268)	$418

Balance_Sheet_Offsetting_Detai

Balance Sheet Offsetting (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Foreign Exchange Contract [Member]	'	'
Offsetting Assets [Line Items]	'	'
Gross Amounts Recognized on the Consolidated Balance Sheets	$198	'
Gross Amounts Not Offset on the Consolidated Balance Sheets, Financial Instruments	-16	'
Gross Amounts Not Offset on the Consolidated Balance Sheets, Cash Collateral	0	'
Net Amount	182	'
Offsetting Liabilities [Line Items]	'	'
Gross Amounts Recognized on the Consolidated Balance Sheets	16	'
Gross Amounts Not Offset on the Consolidated Balance Sheets, Financial Instruments	-16	'
Gross Amounts Not Offset on the Consolidated Balance Sheets, Cash Collateral	0	'
Net Amount	0	'
Interest Rate Swap [Member]	'	'
Offsetting Assets [Line Items]	'	'
Gross Amounts Recognized on the Consolidated Balance Sheets	6,593	5,098
Gross Amounts Not Offset on the Consolidated Balance Sheets, Financial Instruments	-1,830	-2,104
Gross Amounts Not Offset on the Consolidated Balance Sheets, Cash Collateral	0	0
Net Amount	4,763	2,994
Offsetting Liabilities [Line Items]	'	'
Gross Amounts Recognized on the Consolidated Balance Sheets	6,593	5,098
Gross Amounts Not Offset on the Consolidated Balance Sheets, Financial Instruments	-1,830	-2,104
Gross Amounts Not Offset on the Consolidated Balance Sheets, Cash Collateral	-3,870	-730
Net Amount	$893	$2,264

Commitments_and_Contingencies_1

Commitments and Contingencies Outstanding Commitments to Extend Credit and Letters of Credit (Details) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Residential Mortgage Principal Balance Repurchase Request Received	$500,000	$8,800,000
Residential Mortgage, Settlement Agreement, Amount	4,500,000	'
Residential Mortgage, Settlement Agreement Resulting in Reduction to Outstanding Repurchase Request	7,500,000	'
Residential Mortgage, Settlement Agreement Resulting in Reduction to Reserves for Repurchase	5,100,000	'
Decrease in Operating Risk Loss	600,000	'
Residential Mortgage Principal Balance FHLB Credit Enhancement	175,000,000	'
Residential Mortgage Repurchase Reserves FHLB Credit Enhancement	3,200,000	3,600,000
Commitments to Extend Credit [Member] | Reserve for Off-balance Sheet Activities [Member]	'	'
Valuation allowances and Reserves, Balance	4,258,552,000	4,379,578,000
Standby Letters of Credit [Member] | Reserve for Off-balance Sheet Activities [Member]	'	'
Valuation allowances and Reserves, Balance	387,424,000	391,445,000
Commercial Letters of Credit [Member] | Reserve for Off-balance Sheet Activities [Member]	'	'
Valuation allowances and Reserves, Balance	35,404,000	36,344,000
Residential Mortgage [Member] | Reserve for Off-balance Sheet Activities [Member]	'	'
Valuation allowances and Reserves, Balance	$3,600,000	$8,600,000

Fair_Value_Option_Summary_of_C

Fair Value Option Summary of Corporation's Mortgage Loans Held for Sale (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013
			Mortgage Loans Held For Sale [Member]	Mortgage Loans Held For Sale [Member]	Mortgage Loans Held For Sale [Member]	Mortgage Loans Held For Sale [Member]	Mortgage Loans Held For Sale [Member]	Mortgage Loans Held For Sale [Member]
					Cost [Member]	Cost [Member]	Fair Value	Fair Value
Fair Value, Option, Quantitative Disclosures [Line Items]	'	'	'	'	'	'	'	'
Loans Held-for-sale, Mortgages	$24,417,000	$21,351,000	'	'	$23,941,000	$21,172,000	$24,417,000	$21,351,000
Gain (loss) in fair values of mortgage loans held for sale	'	'	$300,000	$700,000	'	'	'	'

Fair_Value_Measurements_Assets

Fair Value Measurements Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Available-for-sale Securities, Fair Value Disclosure	$2,501,198	$2,568,434
Equity Securities [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	45,734	46,201
U.S. Government Securities [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	526	525
U.S. Government-Sponsored Agency Securities [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	280	726
State and Municipal Securities [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	283,453	284,849
Corporate Debt Securities [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	100,552	98,749
Collateralized Mortgage Obligations [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	1,006,737	1,032,398
Mortgage-Backed Securities [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	'	945,712
Auction Rate Securities [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	147,713	159,274
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Mortgages Held-for-sale, Fair Value Disclosure	0	0
Available-for-sale Securities, Fair Value Disclosure	45,734	46,201
Other Assets, Fair Value Disclosure	15,943	15,779
Assets, Fair Value Disclosure	61,677	61,980
Liabilities, Fair Value Disclosure	15,886	15,648
Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	45,734	46,201
Fair Value, Inputs, Level 1 [Member] | U.S. Government Securities [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member] | U.S. Government-Sponsored Agency Securities [Member] | Fair Value, Measurements, Recurring [Member]	'	'
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]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member] | Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member] | Collateralized Mortgage Obligations [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member] | Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member] | Auction Rate Securities [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Mortgages Held-for-sale, Fair Value Disclosure	24,417	21,351
Available-for-sale Securities, Fair Value Disclosure	2,298,272	2,353,872
Other Assets, Fair Value Disclosure	7,798	7,227
Assets, Fair Value Disclosure	2,330,487	2,382,450
Liabilities, Fair Value Disclosure	6,841	5,161
Fair Value, Inputs, Level 2 [Member] | Equity Securities [Member] | Fair Value, Measurements, Recurring [Member]	'	'
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]	'	'
Available-for-sale Securities, Fair Value Disclosure	526	525
Fair Value, Inputs, Level 2 [Member] | U.S. Government-Sponsored Agency Securities [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	280	726
Fair Value, Inputs, Level 2 [Member] | State and Municipal Securities [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	283,453	284,849
Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	91,073	89,662
Fair Value, Inputs, Level 2 [Member] | Collateralized Mortgage Obligations [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	1,006,737	1,032,398
Fair Value, Inputs, Level 2 [Member] | Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	916,203	945,712
Fair Value, Inputs, Level 2 [Member] | Auction Rate Securities [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Level 3 [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Mortgages Held-for-sale, Fair Value Disclosure	0	0
Available-for-sale Securities, Fair Value Disclosure	157,192	168,361
Other Assets, Fair Value Disclosure	0	0
Assets, Fair Value Disclosure	157,192	168,361
Liabilities, Fair Value Disclosure	0	0
Level 3 [Member] | Equity Securities [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Level 3 [Member] | U.S. Government Securities [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Level 3 [Member] | U.S. Government-Sponsored Agency Securities [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Level 3 [Member] | State and Municipal Securities [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Level 3 [Member] | Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	9,479	9,087
Level 3 [Member] | Collateralized Mortgage Obligations [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Level 3 [Member] | Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	0	0
Level 3 [Member] | Auction Rate Securities [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	147,713	159,274
Total [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Mortgages Held-for-sale, Fair Value Disclosure	24,417	21,351
Available-for-sale Securities, Fair Value Disclosure	2,501,198	2,568,434
Other Assets, Fair Value Disclosure	23,741	23,006
Assets, Fair Value Disclosure	2,549,356	2,612,791
Liabilities, Fair Value Disclosure	22,727	20,809
Total [Member] | Equity Securities [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	45,734	46,201
Total [Member] | U.S. Government Securities [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	526	525
Total [Member] | U.S. Government-Sponsored Agency Securities [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	280	726
Total [Member] | State and Municipal Securities [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	283,453	284,849
Total [Member] | Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	100,552	98,749
Total [Member] | Collateralized Mortgage Obligations [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	1,006,737	1,032,398
Total [Member] | Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	916,203	945,712
Total [Member] | Auction Rate Securities [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Available-for-sale Securities, Fair Value Disclosure	$147,713	$159,274

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) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013		Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Available-for-sale Securities, Debt Securities	$2,455,464		'		'
Corporate Debt Securities [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Available-for-sale Securities, Debt Securities	100,552		'		98,749
Pooled Trust Preferred Securities [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Available-for-sale Securities, Debt Securities	5,659		'		5,306
Single-issuer Trust Preferred Securities [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Available-for-sale Securities, Debt Securities	41,879		'		40,531
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]	'		'		'
Available-for-sale Securities, Debt Securities	5,700		'		5,300
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'
Balance, beginning of period	5,306		6,927		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	0		'		'
Unrealized adjustment to fair value	521	[1]	1,429	[1]	'
Settlements - calls	-172		0		'
(Premium amortization) discount accretion	4	[2]	0	[2]	'
Balance, end of period	5,659		8,356		'
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]	'		'		'
Available-for-sale Securities, Debt Securities	3,800		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'
Balance, beginning of period	3,781		3,360		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	0		'		'
Unrealized adjustment to fair value	38	[1]	7	[1]	'
Settlements - calls	0		0		'
(Premium amortization) discount accretion	1	[2]	3	[2]	'
Balance, end of period	3,820		3,370		'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Auction Rate Securities [Member]	'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'
Balance, beginning of period	159,274		149,339		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	-11,912		'		'
Unrealized adjustment to fair value	124	[1]	5,360	[1]	'
Settlements - calls	0		-342		'
(Premium amortization) discount accretion	227	[2]	282	[2]	'
Balance, end of period	147,713		154,639		'
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]	'		'		'
Available-for-sale Securities, Debt Securities	50,400		'		50,300
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]	'		'		'
Available-for-sale Securities, Debt Securities	$38,100		'		$36,700
[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 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, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Inputs, Level 1 [Member]	'	'
Net loans	$0	$0
Total assets	0	0
Fair Value, Inputs, Level 1 [Member] | Other Assets [Member]	'	'
Other finanical assets	0	0
Fair Value, Inputs, Level 2 [Member]	'	'
Net loans	0	0
Total assets	0	0
Fair Value, Inputs, Level 2 [Member] | Other Assets [Member]	'	'
Other finanical assets	0	0
Level 3 [Member]	'	'
Net loans	137,488	138,666
Total assets	194,456	196,170
Level 3 [Member] | Other Assets [Member]	'	'
Other finanical assets	56,968	57,504
Total [Member]	'	'
Net loans	137,488	138,666
Total assets	194,456	196,170
Total [Member] | Other Assets [Member]	'	'
Other finanical assets	$56,968	$57,504

Fair_Value_Measurements_Detail

Fair Value Measurements Details of Book Value and Fair Value of Financial Instruments (Details) (USD $)	Mar. 31, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Balance Sheet Grouping, FinancialStatement Captions[Line Items]	'		'
Securities Available-for-sale	$2,501,198		$2,568,434
Reported Value Measurement [Member]	'		'
Fair Value, Balance Sheet Grouping, FinancialStatement Captions[Line Items]	'		'
Cash and Cash Equivalents	260,389		218,540
Interest-Rate Deposits with Other Banks	225,428		163,988
Loans Held-for-sale	24,417	[1]	21,351	[1]
Securities Available-for-sale	2,501,198	[1]	2,568,434	[1]
Loans, net of unearned income	12,733,792	[1]	12,782,220	[1]
Accrued Interest Receivable	43,376		44,037
Other Financial Assets	149,453	[1]	146,933	[1]
Demand and Savings Deposit Liabilities, Fair Value Disclosure	9,667,357		9,573,264
Time Deposit Liabilities, Fair Value Disclosure	3,002,560		2,917,922
Short-term borrowings	1,069,684		1,258,629
Accrued interest payable	16,972		15,218
Other Financial Liabilities	133,848	[1]	124,440	[1]
Federal Home Loan Bank Advances And Debt Long Term, Fair Value Disclosre	883,461		883,584
Estimate of Fair Value Measurement [Member]	'		'
Fair Value, Balance Sheet Grouping, FinancialStatement Captions[Line Items]	'		'
Cash and Cash Equivalents	260,389		218,540
Interest-Rate Deposits with Other Banks	225,428		163,988
Loans Held-for-sale	24,417	[1]	21,351	[1]
Securities Available-for-sale	2,501,198	[1]	2,568,434	[1]
Loans, net of unearned income	12,628,983	[1]	12,688,774	[1]
Accrued Interest Receivable	43,376		44,037
Other Financial Assets	149,453	[1]	146,933	[1]
Demand and Savings Deposit Liabilities, Fair Value Disclosure	9,667,357		9,573,264
Time Deposit Liabilities, Fair Value Disclosure	3,011,698		2,927,374
Short-term borrowings	1,069,684		1,258,629
Accrued interest payable	16,972		15,218
Other Financial Liabilities	133,848	[1]	124,440	[1]
Federal Home Loan Bank Advances And Debt Long Term, Fair Value Disclosre	881,197		875,984
Interest-bearing Deposits [Member] | Reported Value Measurement [Member]	'		'
Fair Value, Balance Sheet Grouping, FinancialStatement Captions[Line Items]	'		'
Investment in Federal Home Loan Bank Stock, Fair Value Disclosure	81,634		84,173
Interest-bearing Deposits [Member] | Estimate of Fair Value Measurement [Member]	'		'
Fair Value, Balance Sheet Grouping, FinancialStatement Captions[Line Items]	'		'
Investment in Federal Home Loan Bank Stock, Fair Value Disclosure	$81,634		$84,173
[1]	{F|ahBzfndlYmZpbGluZ3MtaHJkcmoLEgZYTUxEb2MiXlhCUkxEb2NHZW5JbmZvOmUxM2UwMzg5OWY5MDRhMjViODhjNGZhMTAzNDZhYTk4fFRleHRTZWxlY3Rpb246RDFEOTA2RENCMzAzQ0E4RkVDQ0QyN0M4OEUzOUYxQ0EM}

Fair_Value_Measurements_Narrat

Fair Value Measurements Narrative (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Fair Value, Equity Securities, Value Test Coverage, Percent	75.00%	'
Fair Value, Equity Securities, Fair Value Price Difference Threshold, Percent	5.00%	'
Corporate debt securities	$2,455,464,000	'
Significant Input, Assumed Market Return to Liquidity, Years	'5 years	'
Other real estate owned (OREO)	15,300,000	15,052,000
Short Term Borrowings, Reprice Period, In Days	90	'
Minimum [Member]	'	'
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Prepayment Speed	11.20%	'
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Discount Rate	9.10%	'
Equity Securities Financial Institution [Member]	'	'
Available-for-sale Securities, Equity Securities	39,800,000	40,600,000
Other Equity Securities [Member]	'	'
Available-for-sale Securities, Equity Securities	5,900,000	5,600,000
Corporate Debt Securities [Member]	'	'
Corporate debt securities	100,552,000	98,749,000
Single-issuer Trust Preferred Securities [Member]	'	'
Corporate debt securities	41,879,000	40,531,000
Pooled Trust Preferred Securities [Member]	'	'
Corporate debt securities	5,659,000	5,306,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Equity Securities Financial Institution [Member]	'	'
Available-for-sale Securities, Equity Securities	39,800,000	40,600,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other Equity Securities [Member]	'	'
Available-for-sale Securities, Equity Securities	5,900,000	5,600,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Financial Institutions Subordinated Debt [Member]	'	'
Corporate debt securities	50,400,000	50,300,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Single-issuer Trust Preferred Securities [Member]	'	'
Corporate debt securities	38,100,000	36,700,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other Corporate Debt [Member]	'	'
Corporate debt securities	2,600,000	2,600,000
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member] | Single-issuer Trust Preferred Securities [Member]	'	'
Corporate debt securities	41,900,000	40,500,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Single-issuer Trust Preferred Securities [Member]	'	'
Corporate debt securities	3,800,000	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Pooled Trust Preferred Securities [Member]	'	'
Corporate debt securities	5,700,000	5,300,000
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]	'	'
Other real estate owned (OREO)	15,300,000	15,100,000
Servicing Asset at Amortized Value, Fair Value	41,700,000	42,500,000
Trust for Benefit of Employees [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]	'	'
Other financial assets	15,700,000	15,300,000
Foreign Exchange Contract [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]	'	'
Other financial assets	300,000	500,000
Forward Contracts [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]	'	'
Other financial assets	1,200,000	2,100,000
Other financial liabilities	200,000	100,000
Interest Rate Swap [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]	'	'
Other financial assets	6,600,000	5,100,000
Other financial liabilities	6,600,000	5,100,000
Foreign Exchange Contract [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]	'	'
Other financial liabilities	199,000	400,000
Trust for Benefit of Employees [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]	'	'
Other financial liabilities	$15,700,000	$15,300,000

Common_Stock_Repurchase_Plan_D

Common Stock Repurchase Plan (Details) (USD $)	Oct. 22, 2013	Feb. 19, 2014
		Subsequent Event [Member]
Class of Stock [Line Items]	'	'
Stock Repurchased During Period, Shares	'	4,000,000
Treasury Stock Acquired, Average Cost Per Share	'	$12.45
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	4,000,000	'
AuthorizedShareRepurchasePlanPercentOfCommonSharesOutstanding	2.10%	'