Loans (Rollforward Of The Allowance For Loan Losses By Portfolio Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011		Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	$ 321,051		$ 524,091		$ 384,351		$ 664,799
Charge-offs	(87,022)		(120,655)		(193,833)		(291,350)
Recoveries	7,715		14,209		28,226		42,196
Provision for loan losses	40,000		32,000		63,000		34,000
Ending Balance	281,744	[1],[2]	449,645	[1],[2]	281,744	[1],[2]	449,645	[1],[2]
Allowance - individually evaluated for impairment	81,709		101,541		81,709		101,541
Allowance - collectively evaluated for impairment	200,035		348,104		200,035		348,104
Loans, net of unearned income	16,523,783	[1],[2]	16,241,402	[1],[2]	16,523,783	[1],[2]	16,241,402	[1],[2]	16,397,127
Individually evaluated for impairment	495,332		495,367		495,332		495,367
Collectively evaluated for impairment	16,028,451		15,746,035		16,028,451		15,746,035
Commercial Financial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	110,645		206,278		130,413		239,469
Charge-offs	(7,077)		(17,348)		(23,310)		(42,200)
Recoveries	1,892		4,716		8,568		13,553
Provision for loan losses	1,081		(11,356)		(9,130)		(28,532)
Ending Balance	106,541		182,290		106,541		182,290
Allowance - individually evaluated for impairment	28,672		46,500		28,672		46,500
Allowance - collectively evaluated for impairment	77,869		135,790		77,869		135,790
Loans, net of unearned income	8,466,450		7,705,749		8,466,450		7,705,749
Individually evaluated for impairment	153,480		203,652		153,480		203,652
Collectively evaluated for impairment	8,312,970		7,502,097		8,312,970		7,502,097
Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	41,546		99,467		55,586		155,085
Charge-offs	(4,446)		(10,702)		(18,070)		(34,413)
Recoveries	1,240		2,673		2,779		7,739
Provision for loan losses	(10,991)		(26,287)		(12,946)		(63,260)
Ending Balance	27,349		65,151		27,349		65,151
Allowance - individually evaluated for impairment	183		7,998		183		7,998
Allowance - collectively evaluated for impairment	27,166		57,153		27,166		57,153
Loans, net of unearned income	1,229,855		1,428,340		1,229,855		1,428,340
Individually evaluated for impairment	66,357		130,543		66,357		130,543
Collectively evaluated for impairment	1,163,498		1,297,797		1,163,498		1,297,797
Consumer Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	133,421		162,655		165,077		192,350
Charge-offs	(69,351)	[3]	(39,122)		(132,618)		(130,886)
Recoveries	2,941		4,052		12,255		12,488
Provision for loan losses	48,938	[4]	34,485		71,235		88,118
Ending Balance	115,949	[1]	162,070	[1]	115,949	[1]	162,070	[1]
Allowance - individually evaluated for impairment	31,629		40,509		31,629		40,509
Allowance - collectively evaluated for impairment	84,320		121,561		84,320		121,561
Loans, net of unearned income	5,735,904	[1]	5,928,310	[1]	5,735,904	[1]	5,928,310	[1]
Individually evaluated for impairment	145,481		112,124		145,481		112,124
Collectively evaluated for impairment	5,590,423		5,816,186		5,590,423		5,816,186
Consumer Real Estate Portfolio Segment [Member] | Discharged Bankrupcy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Charge-offs					40,000
Provision for loan losses					30,000
Permanent Mortgage Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	29,112		46,602		26,194		65,009
Charge-offs	(2,889)	[3]	(48,556)	[5]	(10,597)		(69,340)
Recoveries	734		1,728		1,905		5,262
Provision for loan losses	(1,400)	[4]	31,888		8,055		30,731
Ending Balance	25,557	[2]	31,662	[2]	25,557	[2]	31,662	[2]
Allowance - individually evaluated for impairment	20,988		5,692		20,988		5,692
Allowance - collectively evaluated for impairment	4,569		25,970		4,569		25,970
Loans, net of unearned income	805,511	[2]	880,459	[2]	805,511	[2]	880,459	[2]
Individually evaluated for impairment	129,101		47,910		129,101		47,910
Collectively evaluated for impairment	676,410		832,549		676,410		832,549
Credit Card And Other Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	6,327		9,089		7,081		12,886
Charge-offs	(3,259)		(4,927)		(9,238)		(14,511)
Recoveries	908		1,040		2,719		3,154
Provision for loan losses	2,372		3,270		5,786		6,943
Ending Balance	6,348		8,472		6,348		8,472
Allowance - individually evaluated for impairment	237		842		237		842
Allowance - collectively evaluated for impairment	6,111		7,630		6,111		7,630
Loans, net of unearned income	286,063		298,544		286,063		298,544
Individually evaluated for impairment	913		1,138		913		1,138
Collectively evaluated for impairment	285,150		297,406		285,150		297,406
Restricted Consumer Real Estate Loans And Secured Borrowings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending Balance	14,700				14,700
Loans, net of unearned income	417,000		623,300		417,000		623,300		600,200
Restricted Permanent Mortgage Real Estate Loans And Secured Borrowings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending Balance	600		5,500		600		5,500
Loans, net of unearned income	$ 14,200		$ 42,400		$ 14,200		$ 42,400		$ 40,600

[1] Balances as of September 30, 2012 and 2011 include $14.7 million and $26.9 million of reserves, respectively, and $417.0 million and $623.3 million of balances in restricted consumer real estate loans and secured borrowings, respectively.

[2] Balances as of September 30, 2012 and 2011 include $.6 million and $5.5 million of reserves, respectively, and $14.2 million and $42.4 million of balances in restricted permanent mortgage loans and secured borrowings, respectively.

[3] Third quarter 2012 includes approximately $40 million of charge-off associated with implementation of recently issued regulatory guidance.

[4] Third quarter 2012 includes approximately $30 million of loan loss provision associated with implementation of recently issued regulatory guidance.

[5] Third quarter 2011 includes $40.2 million of charge-offs associated with loan sales.