Investment Securities (Summary Of Held-To-Maturity Securities) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities, Amortized Cost	$ 2,750	$ 3,819	$ 4,385
Held-to-maturity, Gross Unrecognized Gains	246	258	234
Held-to-maturity Securities, Fair Value	2,996	4,077	4,619
Municipal Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities, Amortized Cost	2,750	3,819	4,385
Held-to-maturity, Gross Unrecognized Gains	246	258	234
Held-to-maturity Securities, Fair Value	$ 2,996	$ 4,077	$ 4,619