Fair Value Measurements (Summary Of Gains And Losses On Level 3 Assets And Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Gains and Losses included in earnings for Level 3 assets & liabilities [Line Items]
Total gains or losses included in earnings	$ 916	$ 2,775	$ (436)	$ 8,371
Change in unrealized gains or losses relating to assets still held	916	2,737	(436)	6,909
Loan Fees And Sales [Member]
Gains and Losses included in earnings for Level 3 assets & liabilities [Line Items]
Total gains or losses included in earnings	0	0	0	(9)
Change in unrealized gains or losses relating to assets still held	0	0	0	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	51	1	176	6
Change in unrealized gains or losses relating to assets still held	51	(37)	176	(40)
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	865	2,774	(612)	8,374
Change in unrealized gains or losses relating to assets still held	$ 865	$ 2,774	$ (612)	$ 6,949