Loans (Rollforward Of The Allowance For Loan Losses By Portfolio Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011		Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	$ 384,351		$ 664,799
Charge-offs	(57,083)		(87,352)
Recoveries	10,748		10,681
Provision	8,000		1,000
Ending Balance	346,016	[1],[2]	589,128	[1],[2]
Allowance - individually evaluated for impairment	86,387		103,882
Allowance - collectively evaluated for impairment	259,629		485,246
Loans, net of unearned income	15,971,330	[1],[2]	15,972,372	[1],[2]	16,397,127
Individually evaluated for impairment	487,866		619,342
Collectively evaluated for impairment	15,483,464		15,353,030
Commercial, Financial, And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	130,413		239,469
Charge-offs	(6,074)		(12,059)
Recoveries	4,514		1,956
Provision	(9,275)		(8,766)
Ending Balance	119,578	[1],[2]	220,600	[1],[2]
Allowance - individually evaluated for impairment	29,148		56,962
Allowance - collectively evaluated for impairment	90,430		163,638
Loans, net of unearned income	7,705,153	[1],[2]	6,808,163	[1],[2]
Individually evaluated for impairment	157,126		214,167
Collectively evaluated for impairment	7,548,027		6,593,996
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	55,586		155,085
Charge-offs	(9,619)		(14,286)
Recoveries	496		3,315
Provision	(414)		(20,634)
Ending Balance	46,049	[1],[2]	123,480	[1],[2]
Allowance - individually evaluated for impairment	7,975		11,255
Allowance - collectively evaluated for impairment	38,074		112,225
Loans, net of unearned income	1,346,926	[1],[2]	1,618,854	[1],[2]
Individually evaluated for impairment	110,123		221,400
Collectively evaluated for impairment	1,236,803		1,397,454
Consumer Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	165,077		192,350
Charge-offs	(34,133)		(47,238)
Recoveries	4,139		3,782
Provision	6,564		30,500
Ending Balance	141,647	[1],[2]	179,394	[1],[2]
Allowance - individually evaluated for impairment	32,384		20,968
Allowance - collectively evaluated for impairment	109,263		158,426
Loans, net of unearned income	5,858,821	[1],[2]	6,159,774	[1],[2]
Individually evaluated for impairment	117,556		78,571
Collectively evaluated for impairment	5,741,265		6,081,203
Permanent Mortgage Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	26,194		65,009
Charge-offs	(4,638)		(9,417)
Recoveries	523		550
Provision	10,493		(502)
Ending Balance	32,572	[1],[2]	55,640	[1],[2]
Allowance - individually evaluated for impairment	16,639		14,248
Allowance - collectively evaluated for impairment	15,933		41,392
Loans, net of unearned income	788,700	[1],[2]	1,087,524	[1],[2]
Individually evaluated for impairment	102,033		103,890
Collectively evaluated for impairment	686,667		983,634
Credit Card & Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	7,081		12,886
Charge-offs	(2,619)		(4,352)
Recoveries	1,076		1,078
Provision	632		402
Ending Balance	6,170	[1],[2]	10,014	[1],[2]
Allowance - individually evaluated for impairment	241		449
Allowance - collectively evaluated for impairment	5,929		9,565
Loans, net of unearned income	271,730	[1],[2]	298,057	[1],[2]
Individually evaluated for impairment	1,028		1,314
Collectively evaluated for impairment	270,702		296,743
Restricted Consumer Real Estate Loans And Secured Borrowings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending Balance	20,100		36,500
Loans, net of unearned income	467,000		672,400
Restricted Permanent Mortgage Real Estate Loans And Secured Borrowings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending Balance	5,400		3,300
Loans, net of unearned income	$ 38,000		$ 49,900

[1] Balances as of March 31, 2012 and 2011 include $20.1 million and $36.5 million of reserves, respectively, and $467.0 million and $672.4 million of balances in restricted consumer real estate loans and secured borrowings, respectively.

[2] Balances as of March 31, 2012 and 2011 include $5.4 million and $3.3 million of reserves, respectively, and $38.0 million and $49.9 million of balances in restricted permanent mortgage loans and secured borrowings, respectively.