Allowance For Loan Losses, Allowance For Losses On Lending-Related Commitments And Impaired Loans (Summary Of Recorded Investment Based On Performance Of Loans By Class, Excluding Covered Loans) (Details) (USD $) In Thousands	Sep. 30, 2011		Dec. 31, 2010		Sep. 30, 2010
Loans, net of unearned income, excluding covered loans	$ 10,272,711		$ 9,599,886		$ 9,461,155
Commercial [Member]
Loans, net of unearned income, excluding covered loans	2,337,098		2,049,326		1,952,791
Commercial [Member] | Commercial And Industrial [Member]
Loans, net of unearned income, excluding covered loans	1,414,715		1,310,753		1,263,852
Commercial [Member] | Commercial And Industrial [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	1,393,660		1,294,353		1,244,902
Commercial [Member] | Commercial And Industrial [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	21,055		16,400		18,950
Commercial [Member] | Franchise [Member]
Loans, net of unearned income, excluding covered loans	126,854		119,488		115,380
Commercial [Member] | Franchise [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	125,062		119,488		115,380
Commercial [Member] | Franchise [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	1,792
Commercial [Member] | Mortgage Warehouse Lines Of Credit [Member]
Loans, net of unearned income, excluding covered loans	132,425		131,306		158,597
Commercial [Member] | Mortgage Warehouse Lines Of Credit [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	132,425		131,306		158,597
Commercial [Member] | Community Advantage - Homeowners Association [Member]
Loans, net of unearned income, excluding covered loans	74,281		75,542		66,484
Commercial [Member] | Community Advantage - Homeowners Association [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	74,281		75,542		66,484
Commercial [Member] | Aircraft [Member]
Loans, net of unearned income, excluding covered loans	18,080		24,618		36,523
Commercial [Member] | Aircraft [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	18,080		24,618		36,523
Commercial [Member] | Asset-Based Lending [Member]
Loans, net of unearned income, excluding covered loans	419,737		288,979		241,269
Commercial [Member] | Asset-Based Lending [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	417,748		288,562		240,856
Commercial [Member] | Asset-Based Lending [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	1,989		417		413
Commercial [Member] | Municipal [Member]
Loans, net of unearned income, excluding covered loans	74,723		56,343		38,126
Commercial [Member] | Municipal [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	74,723		56,343		38,126
Commercial [Member] | Leases [Member]
Loans, net of unearned income, excluding covered loans	66,671		41,541		32,559
Commercial [Member] | Leases [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	66,671		41,498		32,478
Commercial [Member] | Leases [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans			43		81
Commercial [Member] | Other [Member]
Loans, net of unearned income, excluding covered loans	2,044		756		1
Commercial [Member] | Other [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	2,044		756		1
Commercial [Member] | Purchased Non-Covered Commercial [Member]
Loans, net of unearned income, excluding covered loans	7,568	[1],[2]		[2]		[2]
Commercial [Member] | Purchased Non-Covered Commercial [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	7,568	[1]
Commercial [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	2,312,262		2,032,466		1,933,347
Commercial [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	24,836		16,860		19,444
Commercial Real-Estate [Member]
Loans, net of unearned income, excluding covered loans	3,465,321		3,338,007		3,331,498
Commercial Real-Estate [Member] | Residential Construction [Member]
Loans, net of unearned income, excluding covered loans	71,941		95,947		102,911
Commercial Real-Estate [Member] | Residential Construction [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	69,478		85,937		97,990
Commercial Real-Estate [Member] | Residential Construction [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	2,463		10,010		4,921
Commercial Real-Estate [Member] | Commercial Construction [Member]
Loans, net of unearned income, excluding covered loans	160,421		131,672		179,667
Commercial Real-Estate [Member] | Commercial Construction [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	157,561		129,852		168,437
Commercial Real-Estate [Member] | Commercial Construction [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	2,860		1,820		11,230
Commercial Real-Estate [Member] | Land [Member]
Loans, net of unearned income, excluding covered loans	199,130		260,189		263,363
Commercial Real-Estate [Member] | Land [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	168,058		222,587		236,229
Commercial Real-Estate [Member] | Land [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	31,072		37,602		27,134
Commercial Real-Estate [Member] | Office [Member]
Loans, net of unearned income, excluding covered loans	533,930		535,331		537,868
Commercial Real-Estate [Member] | Office [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	518,498		522,613		532,123
Commercial Real-Estate [Member] | Office [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	15,432		12,718		5,745
Commercial Real-Estate [Member] | Industrial [Member]
Loans, net of unearned income, excluding covered loans	538,248		500,301		472,556
Commercial Real-Estate [Member] | Industrial [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	536,088		496,821		468,991
Commercial Real-Estate [Member] | Industrial [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	2,160		3,480		3,565
Commercial Real-Estate [Member] | Retail [Member]
Loans, net of unearned income, excluding covered loans	519,235		510,527		492,633
Commercial Real-Estate [Member] | Retail [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	515,571		507,262		490,549
Commercial Real-Estate [Member] | Retail [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	3,664		3,265		2,084
Commercial Real-Estate [Member] | Multi-Family [Member]
Loans, net of unearned income, excluding covered loans	324,777		290,954		279,127
Commercial Real-Estate [Member] | Multi-Family [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	321,354		286,160		269,788
Commercial Real-Estate [Member] | Multi-Family [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	3,423		4,794		9,339
Commercial Real-Estate [Member] | Mixed Use And Other [Member]
Loans, net of unearned income, excluding covered loans	1,063,282		1,013,086		1,003,373
Commercial Real-Estate [Member] | Mixed Use And Other [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	1,053,582		992,812		984,051
Commercial Real-Estate [Member] | Mixed Use And Other [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	9,700		20,274		19,322
Commercial Real-Estate [Member] | Purchased Non-Covered Commercial Real-Estate [Member]
Loans, net of unearned income, excluding covered loans	54,357	[1],[2]		[2]		[2]
Commercial Real-Estate [Member] | Purchased Non-Covered Commercial Real-Estate [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	54,357	[1]
Commercial Real-Estate [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	3,394,547		3,244,044		3,248,158
Commercial Real-Estate [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	70,774		93,963		83,340
Home Equity [Member]
Loans, net of unearned income, excluding covered loans	879,180		914,412		919,824
Home Equity [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	863,754		906,987		913,680
Home Equity [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	15,426		7,425		6,144
Residential Real-Estate [Member]
Loans, net of unearned income, excluding covered loans	326,207		353,336		342,009
Residential Real-Estate [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	318,661		347,251		335,365
Residential Real-Estate [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	7,546		6,085		6,644
Commercial Insurance [Member]
Loans, net of unearned income, excluding covered loans	1,417,572		1,265,500		1,323,934
Commercial Insurance [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	1,406,031		1,248,817		1,307,999
Commercial Insurance [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	11,541		16,683		15,935
Life Insurance [Member]
Loans, net of unearned income, excluding covered loans	1,035,667		826,299		669,390
Life Insurance [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	1,032,905		826,119		667,946
Life Insurance [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	2,762		180		1,444
Purchased Life Insurance [Member]
Loans, net of unearned income, excluding covered loans	635,776	[1],[2]	695,587	[1],[2]	765,604	[1],[2]
Purchased Life Insurance [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	635,776	[1]	695,587	[1]	765,604	[1]
Indirect Consumer [Member]
Loans, net of unearned income, excluding covered loans	62,452		51,147		56,575
Indirect Consumer [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	62,014		50,638		55,774
Indirect Consumer [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	438		509		801
Consumer And Other [Member]
Loans, net of unearned income, excluding covered loans	112,801		106,272		99,530
Consumer And Other [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	112,148		106,019		98,959
Consumer And Other [Member] | Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	653		253		571
Purchased Non-Covered Consumer And Other [Member]
Loans, net of unearned income, excluding covered loans	637	[1],[2]		[2]		[2]
Purchased Non-Covered Consumer And Other [Member] | Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	637	[1]
Performing Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	10,138,735		9,457,928		9,326,832
Nonperforming Financing Receivable [Member]
Loans, net of unearned income, excluding covered loans	$ 133,976		$ 141,958		$ 134,323

[1] Purchased loans represent loans acquired with evidence of credit quality deterioration since origination, in accordance with ASC 310-30.

[2] Purchased loans represent loans acquired with evidence of credit quality deterioration since origination, in accordance with ASC 310-30. Loan agings are based upon contractually required payments.