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, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Gains and Losses included in earnings for Level 3 assets & liabilities [Line Items]
Total gains or losses included in earnings	$ 887	$ (4,765)	$ 4,568	$ 12,134
Change in unrealized gains or losses relating to assets still held	1,295	(4,769)	4,568	(6,263)
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	(63)	0	345	0
Change in unrealized gains or losses relating to assets still held	345	0	345	0
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	75	93	48	198
Change in unrealized gains or losses relating to assets still held	75	89	48	194
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	875	(4,858)	4,175	11,936
Change in unrealized gains or losses relating to assets still held	$ 875	$ (4,858)	$ 4,175	$ (6,457)