Investment Securities (Details 1) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Investment Securities
Due in one year, Amortized Cost	$ 2,692
Due after one year through five years, Amortized Cost	4,637
Due after five years through ten years, Amortized Cost	43,900
Due after ten years, Amortized Cost	85,864
Totals, Amortized Cost	137,093
Due in one year, Estimated Fair Value	2,766
Due after one year through five years, Estimated Fair Value	4,872
Due after five years through ten years, Estimated Fair Value	45,569
Due after ten years, Estimated Fair Value	91,247
Totals, Estimated Fair Value	$ 144,454