Investment Securities - Amortized cost and fair values of securities by contractual maturity (Details 1) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014
Amortized Cost
Within one year	$ 4,016
One to five years	12,617
Five to ten years	30,489
After ten years	25,228
Available for sale securities debt by contracted maturities amortized cost basis, Total	72,350
Government-sponsored enterprise (GSE) residential mortgage-backed and other asset-backed agency securities	46,477
Totals	118,827
Fair Value
Within one year	4,051
One to five years	12,740
Five to ten years	29,928
After ten years	24,985
Available for sale securities debt by contracted maturities fair value basis, Total	71,704
Government-sponsored enterprise (GSE) residential mortgage-backed and other asset-backed agency securities	45,629
Totals	$ 117,333