Fair Value Of Assets And Liabilities (Summary Of Changes In Level 3 Assets And Liabilities Measured At Fair Value) (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
Trading Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 14,905		$ 22,853		$ 18,059		$ 26,478
Net income	1,068		(750)		2,847		2,183
Other comprehensive income	0		0		0		0
Purchases, assets	0		0		0		0
Issuances, assets	0		0		0		0
Sales, assets	0		0		0		(132)
Settlements, assets	(2,229)		(2,930)		(7,162)		(9,356)
Net transfers into/(out of) Level 3, assets	0		0		0		0
Ending Balance	13,744		19,173		13,744		19,173
Net unrealized gains/(losses) included in net income	707	[1]	(1,116)	[1]	1,595	[1]	944	[1]
Loans Held For Sale [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	214,560		215,870		210,487		207,632
Net income	(2,799)		(3,195)		(849)		1,928
Other comprehensive income	0		0		0		0
Purchases, assets	17,368		1,316		35,119		25,205
Issuances, assets	0		0		0		0
Sales, assets	0		0		0		0
Settlements, assets	(4,914)		(6,199)		(15,539)		(23,192)
Net transfers into/(out of) Level 3, assets	(10,576)	[2]	(940)	[2]	(15,579)	[2]	(4,721)	[2]
Ending Balance	213,639		206,852		213,639		206,852
Net unrealized gains/(losses) included in net income	(2,799)	[1]	(3,195)	[1]	(849)	[1]	1,928	[1]
Investment Portfolio [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	6,162		8,181		7,262		39,391
Net income	0		0		0		0
Other comprehensive income	(25)		87		(195)		(1,601)
Purchases, assets	0		0		0		0
Issuances, assets	0		0		0		0
Sales, assets	0		0		0		(29,217)
Settlements, assets	(435)		(402)		(1,365)		(707)
Net transfers into/(out of) Level 3, assets	0		0		0		0
Ending Balance	5,702		7,866		5,702		7,866
Net unrealized gains/(losses) included in net income	0		0		0		0
Venture Capital Funds [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	9,000		13,179		12,179		13,179
Net income	0		0		5,071		0
Other comprehensive income	0		0		0		0
Purchases, assets	0		0		0		0
Issuances, assets	0		0		0		0
Sales, assets	0		0		(8,250)		0
Settlements, assets	0		0		0		0
Net transfers into/(out of) Level 3, assets	0		0		0		0
Ending Balance	9,000		13,179		9,000		13,179
Net unrealized gains/(losses) included in net income	0	[3]	0	[3]	0	[3]	0	[3]
Mortgage Servicing Rights Net [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	129,291		186,958		144,069		207,319
Net income	(2,098)		(30,800)		(4,541)		(38,159)
Other comprehensive income	0		0		0		0
Purchases, assets	0		0		0		0
Issuances, assets	0		0		0		0
Sales, assets	0		0		0		0
Settlements, assets	(6,656)		(5,355)		(18,991)		(18,357)
Net transfers into/(out of) Level 3, assets	0		0		0		0
Ending Balance	120,537		150,803		120,537		150,803
Net unrealized gains/(losses) included in net income	(2,181)	[1]	(30,330)	[1]	(3,800)	[1]	(37,378)	[1]
Net Derivative Liabilities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	(3,505)		(1,270)		(11,820)		(1,000)
Net income	10		0		(1,601)		(1,132)
Other comprehensive income	0		0		0		0
Purchases, liabilities	0		0		0		0
Issuances, liabilities	0		(2,500)		0		(2,500)
Sales, liabilities	0		0		0		0
Settlements, liabilities	1,155		114		11,081		976
Net transfers in/(out) level 3, liabilities	0		0		0		0
Ending Balance	(2,340)		(3,656)		(2,340)		(3,656)
Net unrealized gains/(losses) included in other expense	10	[4]	0	[4]	(1,601)	[4]	(1,132)	[4]
Other Short Term Borrowings [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	(12,439)		(23,645)		(14,833)		(27,309)
Net income	854		7,831		3,248		11,495
Other comprehensive income	0		0		0		0
Purchases, liabilities	0		0		0		0
Issuances, liabilities	0		0		0		0
Sales, liabilities	0		0		0		0
Settlements, liabilities	0		0		0		0
Net transfers in/(out) level 3, liabilities	0		0		0		0
Ending Balance	(11,585)		(15,814)		(11,585)		(15,814)
Net unrealized gains/(losses) included in net income	$ 854	[1]	$ 7,831	[1]	$ 3,248	[1]	$ 11,495	[1]

[1] Primarily included in mortgage banking income on the Consolidated Condensed Statements of Income.

[2] 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).

[3] Represents recognized gains and losses attributable to venture capital investments classified within securities available-for-sale that are included in securities gains/(losses) in noninterest income.

[4] Included in Other expense.