Regulatory Capital (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Regulatory Assets
Goodwill	$ (10,835)		$ (10,835)
Core deposit intangible (net of deferred tax liability)	(1,776)		(2,034)
AOCI Losses	(1,044)	$ 473	1,847	$ 2,182	$ 1,898	$ 1,191
Common equity Tier 1 capital	149,989		143,460
TRUPs	12,000		12,000
Tier 1 capital	161,989		155,460
Allowable reserve for credit losses and other Tier 2 adjustments	10,969		11,027
Subordinated notes	23,000		23,000
Tier 2 capital	195,958		189,487
Risk-weighted assets ("RWA")	1,444,651		1,384,807
Average Assets ("AA")	$ 1,708,802		$ 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	10.38%		10.36%
Tier 1 capital to RWA	11.21%		11.23%
Tier 2 capital to RWA	13.56%		13.68%
Tier 1 capital to AA (leverage)	9.48%		9.50%
PCA well capitalized, percent	5.00%
Common Stock [Member]
Regulatory Assets
Common Equity	$ 163,644		$ 154,482
Bank [Member]
Regulatory Assets
Goodwill	(10,835)		(10,835)
Core deposit intangible (net of deferred tax liability)	(1,776)		(2,034)
AOCI Losses	(1,044)		1,847
Common equity Tier 1 capital	182,081		174,051
Tier 1 capital	182,081		174,051
Allowable reserve for credit losses and other Tier 2 adjustments	10,969		11,027
Tier 2 capital	193,050		185,078
Risk-weighted assets ("RWA")	1,442,319		1,383,048
Average Assets ("AA")	$ 1,706,675		$ 1,632,846
Common Tier 1 capital to RWA	12.62%		12.58%
Tier 1 capital to RWA	12.62%		12.58%
Tier 2 capital to RWA	13.38%		13.38%
Tier 1 capital to AA (leverage)	10.67%		10.66%
Bank [Member] | Common Stock [Member]
Regulatory Assets
Common Equity	$ 195,736		$ 185,073