Fair Value Measurements (Summary Of Gains And Losses On Level 3 Assets And Liabilities) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Gains and Losses included in earnings for Level 3 assets & liabilities [Line Items]
Total gains or losses included in earnings	$ (2,814)	$ 887	$ (3,255)	$ 4,568
Change in unrealized gains or losses relating to assets still held	(2,043)	1,295	(2,992)	4,568
Loans Fees And Sales [Member]
Gains and Losses included in earnings for Level 3 assets & liabilities [Line Items]
Total gains or losses included in earnings	19	(63)	527	345
Change in unrealized gains or losses relating to assets still held	790	345	790	345
Other Non-Interest Income [Member]
Gains and Losses included in earnings for Level 3 assets & liabilities [Line Items]
Total gains or losses included in earnings	(23)	75	(58)	48
Change in unrealized gains or losses relating to assets still held	(23)	75	(58)	48
Investment Securities Gains (Losses), Net [Member]
Gains and Losses included in earnings for Level 3 assets & liabilities [Line Items]
Total gains or losses included in earnings	(2,810)	875	(3,724)	4,175
Change in unrealized gains or losses relating to assets still held	$ (2,810)	$ 875	$ (3,724)	$ 4,175