Investment Securities (Details 1) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Available-for-sale securities, Due in one year or less, Amortized Cost	$ 2,595
Available-for-sale securities, Due after one year through five years, Amortized Cost	15,056
Available-for-sale securities, Due after five years through ten years, Amortized Cost	39,530
Available-for-sale securities, Due after ten years, Amortized Cost	56,560
Available-for-sale securities, MBS/CMO/REMIC, Amortized Cost	145,250
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis	258,991
Available-for-sale securities, Due in one year or less, Fair Value	2,602
Available-for-sale securities, Due after one year through five years, Fair Value	15,331
Available-for-sale securities, Due after five years through ten years, Fair Value	41,614
Available-for-sale securities, Due after ten years, Fair Value	59,026
Available-for-sale securities, MBS/CMO/REMIC, Fair Value	150,525
Available-for-sale securities, Debt Maturities, Fair Value	269,098	232,919
Held-to-maturity securities, Due in one year or less, Amortized Cost	60
Held-to-maturity securities, Due after one year through five years, Amortized Cost	0
Held-to-maturity securities, Due after five years through ten years, Amortized Cost	217
Held-to-maturity securities, Due after ten years, Amortized Cost	0
Held-to-maturity securities, MBS/CMO/REMIC, Amortized Cost	308
Held-to-maturity securities, Debt Maturities, Amortized Cost	585	0
Held-to-maturity securities, Due in one year or less, Fair Value	61
Held-to-maturity securities, Due after one year through five years, Fair Value	0
Held-to-maturity securities, Due after five years through ten years, Fair Value	217
Held-to-maturity securities, Due after ten years, Fair Value	0
Held-to-maturity securities, MBS/CMO/REMIC, Fair Value	317
Held-to-maturity Securities, Debt Maturities, Fair Value	$ 595