Investment Securities (Gross Realized Gains And Losses On Sales Of Available-For-Sale Securities) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Investment Holdings [Line Items]
Gains	$ 7	$ 378
Losses	0	230
U.S. Treasury And Agencies [Member]
Investment Holdings [Line Items]
Gains	0	371
Losses	0	0
Obligations Of States And Political Subdivisions [Member]
Investment Holdings [Line Items]
Gains	7	2
Losses	0	0
Residential Mortgage-Backed Securities And Collateralized Mortgage Obligations [Member]
Investment Holdings [Line Items]
Gains	0	0
Losses	0	230
Other Debt Securities [Member]
Investment Holdings [Line Items]
Gains	0	5
Losses	$ 0	$ 0