Investment Securities Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in one year or less, amortized cost	$ 1,006
Due after one year through five years, amortized cost	18,976
Due after five years through ten years, amortized cost	27,565
Due after ten years, amortized cost	36,854
Subtotal before securities without single maturities, amortized cost	84,401
Collateralized mortgage obligations and mortgage-backed securities, amortized cost	234,713
Equity securities, amortized cost	1,484
Available for sale securities, amortized cost	320,598	$ 272,595
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in one year or less, fair value	1,017
Due after one year through five years, fair value	19,283
Due after five years through ten years, fair value	28,251
Due after ten years, fair value	36,939
Subtotal before securities without single maturities, fair value	85,490
Collateralized mortgage obligations and mortgage-backed securities, fair value	233,703
Equity securities, fair value	1,521
Available-for-sale securities, fair value	320,714	272,790
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [Abstract]
Due after one year through five years, amortized cost	277
Due after five years through ten years, amortized cost	16,570
Due after ten years, amortized cost	34,412
Held-to-maturity securities, amortized cost	51,259	51,343
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Fair Value, Rolling Maturity [Abstract]
Due after one year through five years, fair value	272
Due after five years through ten years, fair value	16,754
Due after ten years, fair value	34,892
Held-to-maturity securities, fair value	$ 51,918	$ 51,501