Investment Securities (Investments Classified By Contractual Maturity Date) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Investment Securities [Abstract]
Held-to-maturity Securities, Amortized Cost, Due after one year through five years	$ 17
Held-to-maturity Securities, Amortized Cost, Due after five years through ten years	23,324
Held-to-maturity Securities, Amortized Cost, Due after ten years	30,749
Held-to-maturity Securities, Amortized Cost, Total	54,090	36,427
Held-to-maturity Securities, Estimated Fair Value, Due after one year through five years	17
Held-to-maturity Securities, Estimated Fair Value, Due after five years through ten years	24,346
Held-to-maturity Securities, Estimated Fair Value, Due after ten years	32,097
Held-to-maturity, Estimated Fair Value	56,460	37,681
Available-for-sale Securities, Amortized Cost, Due in one year or less	4,556
Available-for-sale Securities, Amortized Cost, Due after one year through five years	48,786
Available-for-sale Securities, Amortized Cost, Due after five years through ten years	25,304
Available-for-sale Securities, Amortized Cost, Due after ten years	43,704
Available-for-sale Securities, Amortized Cost, No stated maturity	27
Available-for-sale Securities, Amortized Cost Basis, Total	122,377	107,543
Available-for-sale Securities, Estimated Fair Value, Due in one year or less	4,597
Available-for-sale Securities, Estimated Fair Value, Due after one year through five years	49,442
Available-for-sale Securities, Estimated Fair Value, Due after five years through ten years	25,333
Available-for-sale Securities, Estimated Fair Value, Due after ten years	44,514
Available-for-sale Securities, Estimated Fair Value, No stated maturity	14
Available-for-sale Securities, Estimated Fair Value, Total	$ 123,900	$ 107,530