Regulatory Capital (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Regulatory Assets
Common Equity	$ 104,426	$ 99,783
Total stockholders' equity	104,426	99,783	$ 116,559	$ 110,730
AOCI Losses (Gains)	928	251	378	1,057
Common equity Tier 1 capital	105,354	100,034
TRUPs	12,000	12,000
Tier 1 capital	117,354	112,034
Allowable reserve for credit losses and other Tier 2 adjustments	9,860	8,540
Subordinated notes	23,000	23,000
Tier 2 capital	150,214	143,574
Risk-weighted assets ("RWA")	1,104,505	984,614
Average Assets ("AA")	$ 1,300,445	$ 1,118,843
Common Tier 1 capital to RWA, 2019 Regulatory Min. Ratio + CCB	7.00%
Tier 1 capital to RWA, 2019 Regulatory Min. Ratio + CCB	8.50%
Tier 2 capital to RWA, 2019 Regulatory Min. Ratio + CCB	10.50%
Common Tier 1 capital to RWA	9.54%	10.16%
Tier 1 capital to RWA	10.62%	11.38%
Tier 2 capital to RWA	13.60%	14.58%
Tier 1 capital to AA (leverage)	9.02%	10.01%
Common Stock [Member]
Regulatory Assets
Total stockholders' equity	$ 46	$ 46	47	46
SBLF Preferred Stock [Member]
Regulatory Assets
Total stockholders' equity			$ 20,000	$ 20,000
Bank [Member]
Regulatory Assets
Common Equity	136,109	132,571
Total stockholders' equity	136,109	132,571
AOCI Losses (Gains)	928	251
Common equity Tier 1 capital	137,037	132,822
Tier 1 capital	137,037	132,822
Allowable reserve for credit losses and other Tier 2 adjustments	9,860	8,540
Tier 2 capital	146,897	141,362
Risk-weighted assets ("RWA")	1,102,116	982,347
Average Assets ("AA")	$ 1,298,145	$ 1,116,576
Common Tier 1 capital to RWA	12.43%	13.52%
Tier 1 capital to RWA	12.43%	13.52%
Tier 2 capital to RWA	13.33%	14.39%
Tier 1 capital to AA (leverage)	10.56%	11.90%