Fair Value Of Assets And Liabilities (Summary Of Changes In Level 3 Assets And Liabilities Measured At Fair Value) (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended		3 Months Ended				3 Months Ended				9 Months Ended				3 Months Ended				9 Months Ended				3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended				3 Months Ended				9 Months Ended				3 Months Ended	9 Months Ended		3 Months Ended				9 Months Ended
	Sep. 30, 2010 Securities Available For Sale [Member] Investment Portfolio [Member]		Sep. 30, 2011 Securities Available For Sale [Member] Investment Portfolio [Member]		Sep. 30, 2010 Securities Available For Sale [Member] Venture Capital [Member]		Sep. 30, 2011 Securities Available For Sale [Member] Venture Capital [Member]	Dec. 31, 2010 Securities Available For Sale [Member] Venture Capital [Member]	Sep. 30, 2011 Trading Securities [Member]		Sep. 30, 2010 Trading Securities [Member]		Sep. 30, 2011 Trading Securities [Member]		Sep. 30, 2010 Trading Securities [Member]		Sep. 30, 2011 Loans Held For Sale [Member]		Sep. 30, 2010 Loans Held For Sale [Member]		Sep. 30, 2011 Loans Held For Sale [Member]		Sep. 30, 2010 Loans Held For Sale [Member]		Sep. 30, 2011 Investment Portfolio [Member]		Sep. 30, 2010 Investment Portfolio [Member]		Sep. 30, 2011 Venture Capital [Member]	Sep. 30, 2011 Venture Capital [Member]		Sep. 30, 2010 Venture Capital [Member]		Sep. 30, 2011 Mortgage Servicing Rights, Net [Member]		Sep. 30, 2010 Mortgage Servicing Rights, Net [Member]		Sep. 30, 2011 Mortgage Servicing Rights, Net [Member]		Sep. 30, 2010 Mortgage Servicing Rights, Net [Member]		Sep. 30, 2011 Net Derivative Assets And Liabilities [Member]	Sep. 30, 2011 Net Derivative Assets And Liabilities [Member]		Sep. 30, 2011 Other Short-Term Borrowings And Commercial Paper [Member]		Sep. 30, 2010 Other Short-Term Borrowings And Commercial Paper [Member]		Sep. 30, 2011 Other Short-Term Borrowings And Commercial Paper [Member]		Sep. 30, 2010 Other Short-Term Borrowings And Commercial Paper [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 90,995	[1]	$ 39,391	[1]	$ 16,141		$ 13,179	$ 13,179	$ 22,853	[2]	$ 28,898	[2]	$ 26,478	[2]	$ 56,132	[2]	$ 215,870		$ 209,748		$ 207,632		$ 206,227		$ 8,181	[1]	$ 99,173	[1]	$ 13,179			$ 15,743		$ 186,958		$ 201,746		$ 207,319		$ 302,611		$ (1,270)	$ (1,000)		$ 23,645		$ 25,886		$ 27,309		$ 39,662
Net transfers in/(out) level 3, assets																	(645)	[3]			(2,727)	[3]
Net income					(2,962)				(750)	[2]	1,110	[2]	2,183	[2]	4,272	[2]	(3,195)		4,524		1,928		6,166									(2,962)		(30,800)		(529)		(38,159)		(57,885)			(1,132)		(7,831)		(4,074)		(11,495)		(17,850)
Other comprehensive income	3,073	[1]	(1,601)	[1]																					87	[1]	3,024	[1]
Purchases, assets																	3,408				42,528
Issuances, assets
Issuances, liabilities																																										(2,500)	(2,500)
Sales, assets			(29,217)	[1]									(132)	[2]
Settlements, assets			(707)	[1]					(2,930)	[2]			(9,356)	[2]			(8,586)				(42,509)				(402)	[1]								(5,355)				(18,357)
Settlements, liabilities																																										114	976
Adjustment due to adoption of amendments to ASC 810, assets															(4,776)	[2]																								(2,293)
Purchases, sales, issuances, and settlements, net, assets	(4,673)	[1]									(3,866)	[2]			(29,486)	[2]			1,441				3,320				(12,802)	[1]				398				(9,274)				(50,490)
Purchases, sales, issuances, and settlements, net, liabilities
Ending Balance	89,395	[1]	7,866	[1]	13,179		13,179	13,179	19,173	[2]	26,142	[2]	19,173	[2]	26,142	[2]	206,852		215,713		206,852		215,713		7,866	[1]	89,395	[1]	13,179	13,179		13,179		150,803		191,943		150,803		191,943		(3,656)	(3,656)		15,814		21,812		15,814		21,812
Net unrealized gains/(losses) included in net income									(1,116)	[2],[4]	248	[2],[4]	944	[2],[4]	2,934	[2],[4]	(3,195)	[4]	4,524	[4]	1,928	[4]	6,166	[4]										(30,330)	[4]	(299)	[4]	(37,378)	[4]	(55,066)	[4]				(7,831)	[4]	(4,074)	[4]	(11,495)	[4]	(17,850)	[4]
Net unrealized gains/(losses) included in net income		[1]			(2,962)	[5]																									[5]	(2,962)	[5]
Net unrealized gains/(losses) included in other expense																																											$ (1,132)	[6]

[1] Primarily represents other U.S. government agencies. States and municipalities are not significant.

[2] Primarily represents certificated interest only strips and excess interest mortgage banking trading securities. Capital markets Level 3 trading securities are not significant.

[3] Transfers out of recurring level 3 balances reflect movements out of loans held for sale and into real estate acquired by foreclosure (level 3 nonrecurring).

[4] Primarily included in Mortgage banking income on the Consolidated Condensed Statements of Income.

[5] Represents recognized gains and losses attributable to venture capital investments classified within securities AFS that are included in securities gains/(losses) in noninterest income.

[6] Included in Other expense.