Regulatory Capital (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Regulatory Assets
Goodwill	$ (10,835)		$ (10,835)
Core deposit intangible (net of deferred tax liability)	(1,653)		(2,034)
AOCI Losses	(1,715)	$ (1,044)	1,847	$ 2,633	$ 2,182	$ 1,191
Common equity Tier 1 capital	153,206		143,460
TRUPs	12,000		12,000
Tier 1 capital	165,206		155,460
Allowable reserve for credit losses and other Tier 2 adjustments	11,303		11,027
Subordinated notes	23,000		23,000
Tier 2 capital	199,509		189,487
Risk-weighted assets ("RWA")	1,479,901		1,384,807
Average Assets ("AA")	$ 1,740,743		$ 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	10.35%		10.36%
Tier 1 capital to RWA	11.16%		11.23%
Tier 2 capital to RWA	13.48%		13.68%
Tier 1 capital to AA (leverage)	9.49%		9.50%
PCA well capitalized, percent	5.00%
Common Stock [Member]
Regulatory Assets
Common Equity	$ 167,409		$ 154,482
Bank [Member]
Regulatory Assets
Goodwill	(10,835)		(10,835)
Core deposit intangible (net of deferred tax liability)	(1,653)		(2,034)
AOCI Losses	(1,715)		1,847
Common equity Tier 1 capital	184,735		174,051
Tier 1 capital	184,735		174,051
Allowable reserve for credit losses and other Tier 2 adjustments	11,303		11,027
Tier 2 capital	196,038		185,078
Risk-weighted assets ("RWA")	1,478,474		1,383,048
Average Assets ("AA")	$ 1,738,619		$ 1,632,846
Common Tier 1 capital to RWA	12.49%		12.58%
Tier 1 capital to RWA	12.49%		12.58%
Tier 2 capital to RWA	13.26%		13.38%
Tier 1 capital to AA (leverage)	10.63%		10.66%
Bank [Member] | Common Stock [Member]
Regulatory Assets
Common Equity	$ 198,938		$ 185,073