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, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Trading Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 2,464	$ 2,826	$ 2,573	$ 4,377
Net income	92	304	380	506
Purchases, assets	0	0	0	0
Sales, assets			0	0
Settlements, assets	(251)	(346)	(648)	(2,099)
Net transfers into/(out of) Level 3, assets	0	0	0	0
Ending Balance	2,305	2,784	2,305	2,784
Net unrealized gains/(losses) included in net income	62	244	264	324
SBA - Interest Only Strips
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	1,163		0
Net income	(160)		107
Purchases, assets	0		1,413
Sales, assets			(3,291)
Settlements, assets	0		0
Net transfers into/(out of) Level 3, assets	2,120		4,894
Ending Balance	3,123		3,123
Net unrealized gains/(losses) included in net income	(72)		(122)
Loans Held For Sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	20,587	25,738	21,924	27,418
Net income	390	1,604	1,722	2,375
Purchases, assets	43	198	118	673
Sales, assets			0	0
Settlements, assets	(939)	(2,146)	(3,340)	(4,643)
Net transfers into/(out of) Level 3, assets	0	(2,858)	(343)	(3,287)
Ending Balance	20,081	22,536	20,081	22,536
Net unrealized gains/(losses) included in net income	390	1,604	1,722	2,375
AFS Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance		1,500		1,500
Net income		0		0
Purchases, assets		0		0
Sales, assets				0
Settlements, assets		(1,500)		(1,500)
Net transfers into/(out of) Level 3, assets		0		0
Ending Balance		0		0
Net unrealized gains/(losses) included in net income		0		0
Mortgage Servicing Rights Net
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance		1,406		1,841
Net income		0		31
Purchases, assets		0		0
Sales, assets				(205)
Settlements, assets		(160)		(421)
Net transfers into/(out of) Level 3, assets		0		0
Ending Balance		1,246		1,246
Net unrealized gains/(losses) included in net income		0		0
Net Derivative Liabilities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	(5,700)	(6,835)	(6,245)	(4,810)
Net income	(129)	(4)	(179)	(2,627)
Purchases, liabilities	0	0	0	0
Sales, liabilities			0	0
Settlements, liabilities	299	299	894	897
Net transfers in/(out) level 3, liabilities	0	0	0	0
Ending Balance	(5,530)	(6,540)	(5,530)	(6,540)
Net unrealized gains/(losses) included in other expense	$ (129)	$ (4)	$ (179)	$ (2,627)