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
	Mar. 31, 2012		Mar. 31, 2011
Trading Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 18,059		$ 26,478
Net income	1,878		2,200
Purchases, assets
Issuances, assets
Sales, assets
Settlements, assets	(2,551)		(3,308)
Net transfers into/(out of) Level 3, assets
Ending Balance	17,386		25,370
Net unrealized gains/(losses) included in net income	1,406	[1]	1,774	[1]
Loans Held-For-Sale [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	210,487		207,632
Net income	872		(4,125)
Purchases, assets	11,442		16,041
Issuances, assets
Sales, assets
Settlements, assets	(8,344)		(9,350)
Net transfers into/(out of) Level 3, assets	146	[2]	(335)	[2]
Ending Balance	214,603		209,863
Net unrealized gains/(losses) included in net income	872	[1]	(4,125)	[1]
Investment Portfolio [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	7,262		39,391
Other comprehensive income	(166)		(1,746)
Purchases, assets
Issuances, assets
Sales, assets			(29,217)
Settlements, assets	(502)
Net transfers into/(out of) Level 3, assets
Ending Balance	6,594		8,428
Net unrealized gains/(losses) included in net income
Venture Capital Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	12,179		13,179
Purchases, assets
Issuances, assets
Sales, assets
Settlements, assets
Net transfers into/(out of) Level 3, assets
Ending Balance	12,179		13,179
Net unrealized gains/(losses) included in net income		[3]		[3]
Mortgage Servicing Rights, Net [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	144,069		207,319
Net income	4,471		7,647
Purchases, assets
Issuances, assets
Sales, assets
Settlements, assets	(5,584)		(7,218)
Net transfers into/(out of) Level 3, assets
Ending Balance	142,956		207,748
Net unrealized gains/(losses) included in net income	5,213	[1]	7,763	[1]
Net Derivative Liabilities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	(11,820)		(1,000)
Net income	(742)		(1,100)
Purchases, liabilities
Issuances, liabilities
Sales, liabilities
Settlements, liabilities	9,602
Net transfers in/(out) level 3, liabilities
Ending Balance	(2,960)		(2,100)
Net unrealized gains/(losses) included in other expense	(742)	[4]	(1,100)	[4]
Other Short-Term Borrowings [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	(14,833)		(27,309)
Net income	(240)		(682)
Purchases, liabilities
Issuances, liabilities
Sales, liabilities
Settlements, liabilities
Net transfers in/(out) level 3, liabilities
Ending Balance	(15,073)		(27,991)
Net unrealized gains/(losses) included in net income	$ (240)	[1]	$ (682)	[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.