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
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Trading Account Assets [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance		$ 2,826	$ 4,929	$ 4,377	$ 5,642
Net income		304	57	506	296
Other comprehensive income			0		0
Purchases, assets		0	0	0	0
Sales, assets				0
Settlements, assets		(346)	(383)	(2,099)	(1,335)
Net transfers into/(out of) Level 3, assets		0	0	0	0
Ending Balance		2,784	4,603	2,784	4,603
Net unrealized gains/(losses) included in net income	[1]	244	57	324	296
Loans Held For Sale [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance		25,738	26,525	27,418	27,910
Net income		1,604	803	2,375	2,193
Other comprehensive income			0		0
Purchases, assets		198	1,902	673	3,080
Sales, assets				0
Settlements, assets		(2,146)	(1,664)	(4,643)	(4,483)
Net transfers into/(out of) Level 3, assets	[2]	(2,858)	(777)	(3,287)	(1,911)
Ending Balance		22,536	26,789	22,536	26,789
Net unrealized gains/(losses) included in net income	[1]	1,604	803	2,375	2,193
AFS Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance		1,500	3,060	1,500	3,307
Net income		0	0	0	0
Other comprehensive income			(16)		(44)
Purchases, assets		0	0	0	0
Sales, assets				0
Settlements, assets		(1,500)	(98)	(1,500)	(317)
Net transfers into/(out of) Level 3, assets		0	0	0	0
Ending Balance		0	2,946	0	2,946
Net unrealized gains/(losses) included in net income		0	0	0	0
Mortgage Servicing Rights Net [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance		1,406	2,158	1,841	2,517
Net income		0	0	31	0
Other comprehensive income			0		0
Purchases, assets		0	0	0	0
Sales, assets				(205)
Settlements, assets		(160)	(165)	(421)	(524)
Net transfers into/(out of) Level 3, assets		0	0	0	0
Ending Balance		1,246	1,993	1,246	1,993
Net unrealized gains/(losses) included in net income		0	0	0	0
Net Derivative Liabilities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance		(6,835)	(4,810)	(4,810)	(5,240)
Net income		(4)	(302)	(2,627)	(466)
Other comprehensive income			0		0
Purchases, liabilities		0	0	0	0
Sales, liabilities				0
Settlements, liabilities		299	302	897	896
Net transfers in/(out) level 3, liabilities		0	0	0	0
Ending Balance		(6,540)	(4,810)	(6,540)	(4,810)
Net unrealized gains/(losses) included in other expense	[3]	$ (4)	$ (302)	$ (2,627)	$ (466)

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

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

[3] Included in Other expense.