Investment Securities (Investments Classified By Contractual Maturity Date) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Investment Securities [Abstract]
Held-to-maturity Securities, Amortized Cost, Due after one year through five years	$ 32
Held-to-maturity Securities, Amortized Cost, Due after five years through ten years	23,530
Held-to-maturity Securities, Amortized Cost, Due after ten years	32,451
Held-to-maturity Securities, Amortized Cost, Total	56,013	36,427
Held-to-maturity Securities, Estimated Fair Value, Due after one year through five years	32
Held-to-maturity Securities, Estimated Fair Value, Due after five years through ten years	23,892
Held-to-maturity Securities, Estimated Fair Value, Due after ten years	33,460
Held-to-maturity, Estimated Fair Value	57,384	37,681
Available-for-sale Securities, Amortized Cost, Due in one year or less	2,541
Available-for-sale Securities, Amortized Cost, Due after one year through five years	54,368
Available-for-sale Securities, Amortized Cost, Due after five years through ten years	26,448
Available-for-sale Securities, Amortized Cost, Due after ten years	43,654
Available-for-sale Securities, Amortized Cost, No stated maturity	27
Available-for-sale Securities, Amortized Cost Basis, Total	127,038	107,543
Available-for-sale Securities, Estimated Fair Value, Due in one year or less	2,541
Available-for-sale Securities, Estimated Fair Value, Due after one year through five years	54,454
Available-for-sale Securities, Estimated Fair Value, Due after five years through ten years	26,388
Available-for-sale Securities, Estimated Fair Value, Due after ten years	44,304
Available-for-sale Securities, Estimated Fair Value, No stated maturity	14
Available-for-sale Securities, Estimated Fair Value, Total	$ 127,701	$ 107,530