Regulatory Capital (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Regulatory Assets
Goodwill	$ (10,835)	$ (10,835)
Core deposit intangible (net of deferred tax liability)	(1,903)	(2,034)
AOCI Losses	473	1,847	$ 1,898	$ 1,191
Common equity Tier 1 capital	146,815	143,460
TRUPs	12,000	12,000
Tier 1 capital	158,815	155,460
Allowable reserve for credit losses and other Tier 2 adjustments	10,897	11,027
Subordinated notes	23,000	23,000
Tier 2 capital	192,712	189,487
Risk-weighted assets ("RWA")	1,413,324	1,384,807
Average Assets ("AA")	$ 1,687,948	$ 1,635,594
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	10.39%	10.36%
Tier 1 capital to RWA	11.24%	11.23%
Tier 2 capital to RWA	13.64%	13.68%
Tier 1 capital to AA (leverage)	9.41%	9.50%
Capital required for capital adequacy to risk weighted assets	8.00%
Common Stock [Member]
Regulatory Assets
Common Equity	$ 159,080	$ 154,482
Bank [Member]
Regulatory Assets
Goodwill	(10,835)	(10,835)
Core deposit intangible (net of deferred tax liability)	(1,903)	(2,034)
AOCI Losses	473	1,847
Common equity Tier 1 capital	178,891	174,051
Tier 1 capital	178,891	174,051
Allowable reserve for credit losses and other Tier 2 adjustments	10,897	11,027
Tier 2 capital	189,788	185,078
Risk-weighted assets ("RWA")	1,411,172	1,383,048
Average Assets ("AA")	$ 1,686,046	$ 1,632,846
Common Tier 1 capital to RWA	12.68%	12.58%
Tier 1 capital to RWA	12.68%	12.58%
Tier 2 capital to RWA	13.45%	13.38%
Tier 1 capital to AA (leverage)	10.61%	10.66%
Bank [Member] | Common Stock [Member]
Regulatory Assets
Common Equity	$ 191,156	$ 185,073