Securities Amortized cost and fair value of securities available for sale by contractual maturity (Details) $ in Thousands	Dec. 31, 2015 USD ($)
Amortized Cost [Abstract]
Due in one year or less	$ 715
Due after one year through five years	10,860
Due after five years through ten years	26,029
Due after ten years	133,029
Total	371,733
Fair Value [Abstract]
Due in one year or less	715
Due after one year through five years	11,200
Due after five years through ten years	25,763
Due after ten years	133,674
Total	374,571
Mortgage-backed securities [Member]
Amortized Cost [Abstract]
Total	142,142
Fair Value [Abstract]
Total	144,438
Other Asset Backed Securities [Member]
Amortized Cost [Abstract]
Total	58,958
Fair Value [Abstract]
Total	$ 58,781