Securities Amortized cost and fair value of securities available for sale by contractual maturity (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Amortized Cost [Abstract]
Due in one year or less	$ 3,893
Due after one year through five years	32,395
Due after five years through ten years	31,430
Due after ten years	38,233
Total	328,027
Fair Value [Abstract]
Due in one year or less	3,965
Due after one year through five years	32,896
Due after five years through ten years	30,541
Due after ten years	36,585
Total	328,423
Mortgage-backed securities [Member]
Amortized Cost [Abstract]
Total	188,124
Fair Value [Abstract]
Total	189,944
Other Asset Backed Securities [Member]
Amortized Cost [Abstract]
Total	33,883
Fair Value [Abstract]
Total	34,418
Corporate preferred stock [Member]
Amortized Cost [Abstract]
Total	69
Fair Value [Abstract]
Total	$ 74