Investment Securities (Gross Realized Gains And Losses On Sales Of Available-For-Sale Securities Table) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Investment Holdings [Line Items]
Gains	$ 1,484	$ 6,482	$ 1,862	$ 6,482
Losses	454	804	684	804
U.S. Treasury And Agencies [Member]
Investment Holdings [Line Items]
Gains			371
Obligations Of States And Political Subdivisions [Member]
Investment Holdings [Line Items]
Gains		7	2	7
Losses			1
Residential Mortgage-Backed Securities And Collateralized Mortgage Obligations [Member]
Investment Holdings [Line Items]
Gains	1,484	6,475	1,484	6,475
Losses	454	804	683	804
Other Debt Securities [Member]
Investment Holdings [Line Items]
Gains			$ 5