Investment Securities - Amortized cost and fair values of securities by contractual maturity (Details 1) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Amortized Cost
Within one year	$ 6,755
One to five years	13,152
Five to ten years	32,494
After ten years	27,547
Available for sale securities debt by contracted maturities amortized cost basis, Total	79,948
Government-sponsored enterprise (GSE) residential mortgage-backed and other asset-backed agency securities	42,782
Total amortized cost of available-for-sale securities	122,730
Fair Value
Within one year	6,816
One to five years	13,270
Five to ten years	31,599
After ten years	26,401
Available for sale securities debt by contracted maturities fair value basis, Total	78,086
Government-sponsored enterprise (GSE) residential mortgage-backed and other asset-backed agency securities	41,801
Total fair value of available-for-sale securities	$ 119,887