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, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Trading Account Assets [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 15,877		$ 14,905		$ 17,992		$ 18,059
Net income	1,944		1,068		4,474		2,847
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	(2,102)		(2,229)		(6,747)		(7,162)
Net transfers into/(out of) Level 3, assets	0		0		0		0
Ending Balance	15,719		13,744		15,719		13,744
Net unrealized gains/(losses) included in net income	1,540	[1]	707	[1]	3,127	[1]	1,595	[1]
Loans Held For Sale [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	235,080		214,560		221,094		210,487
Net income	(1,805)		(2,799)		(3,940)		(849)
Other comprehensive income	0		0		0		0
Purchases, assets	12,338		23,561		49,847		41,313
Issuances, assets	0		0		0		0
Sales, assets	0		0		0		0
Settlements, assets	(11,390)		(11,107)		(25,990)		(21,733)
Net transfers into/(out of) Level 3, assets	(4,463)	[2]	(10,576)	[2]	(11,251)	[3]	(15,579)	[3]
Ending Balance	229,760		213,639		229,760		213,639
Net unrealized gains/(losses) included in net income	(1,805)	[1]	(2,799)	[1]	(3,940)	[1]	(849)	[1]
Investment Portfolio [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	4,354		6,162		5,253		7,262
Net income	0		0		0		0
Other comprehensive income	(17)		(25)		(93)		(195)
Purchases, assets	0		0		0		0
Issuances, assets	0		0		0		0
Sales, assets	0		0		0		0
Settlements, assets	(309)		(435)		(1,132)		(1,365)
Net transfers into/(out of) Level 3, assets	0		0		0		0
Ending Balance	4,028		5,702		4,028		5,702
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	4,300		9,000		4,300		12,179
Net income	0		0		0		5,071
Other comprehensive income	0		0		0		0
Purchases, assets	0		0		0		0
Issuances, assets	0		0		0		0
Sales, assets	0		0		0		(8,250)
Settlements, assets	0		0		0		0
Net transfers into/(out of) Level 3, assets	0		0		0		0
Ending Balance	4,300		9,000		4,300		9,000
Net unrealized gains/(losses) included in net income	0	[4]	0	[4]	0	[4]	0	[4]
Mortgage Servicing Rights Net [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	113,853		129,291		114,311		144,069
Net income	8,932		(2,098)		20,267		(4,541)
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	(6,099)		(6,656)		(17,892)		(18,991)
Net transfers into/(out of) Level 3, assets	0		0		0		0
Ending Balance	116,686		120,537		116,686		120,537
Net unrealized gains/(losses) included in net income	9,107	[1]	(2,181)	[1]	20,424	[1]	(3,800)	[1]
Net Derivative Liabilities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	(2,195)		(3,505)		(2,175)		(11,820)
Net income	(871)		10		(1,522)		(1,601)
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	321		1,155		952		11,081
Net transfers in/(out) level 3, liabilities	0		0		0		0
Ending Balance	(2,745)		(2,340)		(2,745)		(2,340)
Net unrealized gains/(losses) included in other expense	(871)	[5]	10	[5]	(1,523)	[6]	(1,601)	[6]
Other Short Term Borrowings [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	(12,349)		(12,439)		(11,156)		(14,833)
Net income	634		854		(559)		3,248
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	(11,715)		(11,585)		(11,715)		(11,585)
Net unrealized gains/(losses) included in net income	$ 634	[1]	$ 854	[1]	$ (559)	[1]	$ 3,248	[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] Transfers out of recurring loans held-for-sale level 3 balances reflect movements out of loans held-for-sale and into real estate acquired by foreclosure (level 3 nonrecurring).

[4] 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.

[5] Included in Other expense.

[6] Included in Other expense