Loans (Balance Of Loans By Portfolio) (Details) (USD $) In Thousands	Sep. 30, 2011		Jun. 30, 2011	Dec. 31, 2010		Sep. 30, 2010		Jun. 30, 2010	Dec. 31, 2009
Participating Mortgage Loans [Line Items]
Loans, net of unearned income	$ 16,241,402	[1],[2]		$ 16,782,572		$ 17,059,489	[1],[2]
Allowance for loan losses	449,645	[1],[2]	524,091	664,799		719,899	[1],[2]	781,269	896,914
Total net loans	15,791,757			16,117,773		16,339,590
Commercial [Member] | Commercial, Financial, And Industrial [Member]
Participating Mortgage Loans [Line Items]
Loans, net of unearned income	7,705,749			7,338,155		7,336,986
Commercial [Member] | Income CRE [Member]
Participating Mortgage Loans [Line Items]
Loans, net of unearned income	1,286,683			1,406,646		1,518,942
Commercial [Member] | Residential CRE [Member]
Participating Mortgage Loans [Line Items]
Loans, net of unearned income	141,657			263,878		323,725
Retail [Member] | Consumer Real Estate [Member]
Participating Mortgage Loans [Line Items]
Loans, net of unearned income	5,305,005			5,617,619		5,787,698
Retail [Member] | Permanent Mortgage [Member]
Participating Mortgage Loans [Line Items]
Loans, net of unearned income	838,020			1,086,859		969,244
Retail [Member] | Credit Card And Other [Member]
Participating Mortgage Loans [Line Items]
Loans, net of unearned income	298,544			311,924		326,365
Retail [Member] | Restricted Real Estate Loans [Member]
Participating Mortgage Loans [Line Items]
Loans, net of unearned income	665,744	[3]		757,491	[3]	796,529	[3]
Restricted Consumer Real Estate Loans [Member]
Participating Mortgage Loans [Line Items]
Loans, net of unearned income	623,300			701,800		735,800
Allowance for loan losses	26,900					41,900
Restricted Permanent Mortgage Loans [Member]
Participating Mortgage Loans [Line Items]
Loans, net of unearned income	42,400			55,700		60,700
Allowance for loan losses	5,500					5,900
Commercial, Financial, And Industrial [Member]
Participating Mortgage Loans [Line Items]
Loans, net of unearned income	7,705,749					7,336,986
Consumer Real Estate [Member]
Participating Mortgage Loans [Line Items]
Loans, net of unearned income	5,928,310					6,523,513
Permanent Mortgage [Member]
Participating Mortgage Loans [Line Items]
Loans, net of unearned income	880,459	[4]				1,029,958	[4]
Credit Card And Other [Member]
Participating Mortgage Loans [Line Items]
Loans, net of unearned income	$ 298,544					$ 326,365

[1] Q3 2011 and Q3 2010 include $26.9 million and $41.9 million of reserves, respectively, and $623.3 million and $735.8 million of balances in restricted consumer real estate loans, respectively.

[2] Q3 2011 and Q3 2010 include $5.5 million and $5.9 million of reserves, respectively, and $42.4 million and $60.7 million of balances in restricted permanent mortgage loans, respectively.

[3] Balances as of September 30, 2011 and 2010, and December 31, 2010, include $623.3 million, $735.8 million, and $701.8 million of consumer real estate loans and $42.4 million, $60.7 million, and $55.7 million of permanent mortgage loans, respectively.

[4] Includes restricted loans.