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				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Trading Account Assets [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 16,459		$ 17,386		$ 17,992		$ 18,059
Net income	1,608		(99)		2,529		1,779
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	(2,190)		(2,382)		(4,644)		(4,933)
Net transfers into/(out of) Level 3, assets	0		0		0		0
Ending Balance	15,877		14,905		15,877		14,905
Net unrealized gains/(losses) included in net income	1,156	[1]	(518)	[1]	1,587	[1]	888	[1]
Loans Held For Sale [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	232,684		214,603		221,094		210,487
Net income	(2,310)		1,078		(2,135)		1,950
Other comprehensive income	0		0		0		0
Purchases, assets	19,042		6,725		37,509		17,752
Issuances, assets	0		0		0		0
Sales, assets	0		0		0		0
Settlements, assets	(10,372)		(4,872)		(14,600)		(10,626)
Net transfers into/(out of) Level 3, assets	(3,964)	[2]	(2,974)	[2]	(6,788)	[3]	(5,003)	[3]
Ending Balance	235,080		214,560		235,080		214,560
Net unrealized gains/(losses) included in net income	(2,310)	[1]	1,078	[1]	(2,135)	[1]	1,950	[1]
Investment Portfolio [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	4,776		6,594		5,253		7,262
Net income	0		0		0		0
Other comprehensive income	(39)		(4)		(76)		(170)
Purchases, assets	0		0		0		0
Issuances, assets	0		0		0		0
Sales, assets	0		0		0		0
Settlements, assets	(383)		(428)		(823)		(930)
Net transfers into/(out of) Level 3, assets	0		0		0		0
Ending Balance	4,354		6,162		4,354		6,162
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		12,179		4,300		12,179
Net income	0		5,071		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		(8,250)		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	109,102		142,956		114,311		144,069
Net income	10,502		(6,914)		11,335		(2,443)
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	(5,751)		(6,751)		(11,793)		(12,335)
Net transfers into/(out of) Level 3, assets	0		0		0		0
Ending Balance	113,853		129,291		113,853		129,291
Net unrealized gains/(losses) included in net income	10,391	[1]	(6,831)	[1]	11,316	[1]	(1,618)	[1]
Net Derivative Liabilities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	(2,050)		(2,960)		(2,175)		(11,820)
Net income	(466)		(869)		(652)		(1,611)
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		324		632		9,926
Net transfers in/(out) level 3, liabilities	0		0		0		0
Ending Balance	(2,195)		(3,505)		(2,195)		(3,505)
Net unrealized gains/(losses) included in other expense	(466)	[5]	(869)	[5]	(652)	[6]	(1,611)	[6]
Other Short Term Borrowings [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	(10,984)		(15,073)		(11,156)		(14,833)
Net income	(1,365)		2,634		(1,193)		2,394
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	(12,349)		(12,439)		(12,349)		(12,439)
Net unrealized gains/(losses) included in net income	$ (1,365)	[1]	$ 2,634	[1]	$ (1,193)	[1]	$ 2,394	[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