Investment Securities - MBS Maturities (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Available for sale securities, Amortized cost
Due one year or less	$ 39,563	$ 51,049
Due after one year through five years	149,395	153,444
Due after five years through ten years	167,301	182,996
Due after ten years	82,011	62,642
Total	438,270	450,131
Available for sale securities, Fair Value
Due one year or less	39,648	50,978
Due after one year through five years	150,587	152,916
Due after five years through ten years	173,908	184,870
Due after ten years	82,734	62,171
Total	446,877	450,935
Securities pledged to secure public deposits
Available for sale securities, Amortized cost
Total	165,600	153,900
Available for sale securities, Fair Value
Total	$ 170,200	$ 155,200