Loans (Rollforward Of The Allowance For Loan Losses By Portfolio Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011		Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	$ 346,016		$ 589,128		$ 384,351		$ 664,799
Charge-offs	(49,728)		(83,344)		(106,811)		(170,695)
Recoveries	9,763		17,307		20,511		27,987
Provision	15,000		1,000		23,000		2,000
Ending Balance	321,051	[1],[2]	524,091	[1],[2]	321,051	[1],[2]	524,091	[1],[2]
Allowance - individually evaluated for impairment	96,205		99,464		96,205		99,464
Allowance - collectively evaluated for impairment	224,846		424,627		224,846		424,627
Loans, net of unearned income	16,185,763	[1],[2]	16,061,646	[1],[2]	16,185,763	[1],[2]	16,061,646	[1],[2]	16,397,127
Individually evaluated for impairment	494,018		594,565		494,018		594,565
Collectively evaluated for impairment	15,691,745		15,467,081		15,691,745		15,467,081
Commercial, Financial, And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	119,578		220,600		130,413		239,469
Charge-offs	(10,159)		(12,793)		(16,233)		(24,852)
Recoveries	2,162		6,881		6,676		8,837
Provision	(936)		(8,410)		(10,211)		(17,176)
Ending Balance	110,645		206,278		110,645		206,278
Allowance - individually evaluated for impairment	31,458		50,673		31,458		50,673
Allowance - collectively evaluated for impairment	79,187		155,605		79,187		155,605
Loans, net of unearned income	7,981,365		7,180,261		7,981,365		7,180,261
Individually evaluated for impairment	155,863		215,904		155,863		215,904
Collectively evaluated for impairment	7,825,502		6,964,357		7,825,502		6,964,357
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	46,049		123,480		55,586		155,085
Charge-offs	(4,002)		(9,426)		(13,621)		(23,711)
Recoveries	1,043		1,752		1,539		5,066
Provision	(1,544)		(16,339)		(1,958)		(36,973)
Ending Balance	41,546		99,467		41,546		99,467
Allowance - individually evaluated for impairment	7,707		9,797		7,707		9,797
Allowance - collectively evaluated for impairment	33,839		89,670		33,839		89,670
Loans, net of unearned income	1,314,169		1,493,636		1,314,169		1,493,636
Individually evaluated for impairment	92,645		174,379		92,645		174,379
Collectively evaluated for impairment	1,221,524		1,319,257		1,221,524		1,319,257
Consumer Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	141,647		179,394		165,077		192,350
Charge-offs	(29,136)		(44,526)		(63,269)		(91,764)
Recoveries	5,175		4,654		9,314		8,436
Provision	15,735		23,133		22,299		53,633
Ending Balance	133,421	[1]	162,655	[1]	133,421	[1]	162,655	[1]
Allowance - individually evaluated for impairment	32,688		23,656		32,688		23,656
Allowance - collectively evaluated for impairment	100,733		138,999		100,733		138,999
Loans, net of unearned income	5,855,564	[1]	6,032,401	[1]	5,855,564	[1]	6,032,401	[1]
Individually evaluated for impairment	125,040		88,088		125,040		88,088
Collectively evaluated for impairment	5,730,524		5,944,313		5,730,524		5,944,313
Permanent Mortgage Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	32,572		55,640		26,194		65,009
Charge-offs	(3,071)		(11,367)		(7,709)		(20,784)
Recoveries	648		2,984		1,171		3,534
Provision	(1,037)		(655)		9,456		(1,157)
Ending Balance	29,112	[2]	46,602	[2]	29,112	[2]	46,602	[2]
Allowance - individually evaluated for impairment	24,131		14,586		24,131		14,586
Allowance - collectively evaluated for impairment	4,981		32,016		4,981		32,016
Loans, net of unearned income	755,707	[2]	1,059,975	[2]	755,707	[2]	1,059,975	[2]
Individually evaluated for impairment	119,537		115,008		119,537		115,008
Collectively evaluated for impairment	636,170		944,967		636,170		944,967
Credit Card & Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	6,170		10,014		7,081		12,886
Charge-offs	(3,360)		(5,232)		(5,979)		(9,584)
Recoveries	735		1,036		1,811		2,114
Provision	2,782		3,271		3,414		3,673
Ending Balance	6,327		9,089		6,327		9,089
Allowance - individually evaluated for impairment	221		752		221		752
Allowance - collectively evaluated for impairment	6,106		8,337		6,106		8,337
Loans, net of unearned income	278,958		295,373		278,958		295,373
Individually evaluated for impairment	933		1,186		933		1,186
Collectively evaluated for impairment	278,025		294,187		278,025		294,187
Restricted Consumer Real Estate Loans And Secured Borrowings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending Balance	19,000		29,900		19,000		29,900
Loans, net of unearned income	447,500		649,200		447,500		649,200		600,200
Restricted Permanent Mortgage Real Estate Loans And Secured Borrowings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending Balance	1,300		3,100		1,300		3,100
Loans, net of unearned income	$ 16,900		$ 44,900		$ 16,900		$ 44,900		$ 40,600

[1] Balances as of June 30, 2012 and 2011 include $19.0 million and $29.9 million of reserves, respectively, and $447.5 million and $649.2 million of balances in restricted consumer real estate loans and secured borrowings, respectively.

[2] Balances as of June 30, 2012 and 2011 include $1.3 million and $3.1 million of reserves, respectively, and $16.9 million and $44.9 million of balances in restricted permanent mortgage loans and secured borrowings, respectively.