Regulatory Capital Requirements (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 common equity, (to risk-weighted assets), Actual Amount	$ 313,803		$ 300,589
Tier 1 common equity, (to risk-weighted assets), Actual Ratio (as a percent)	10.84%		12.39%
Tier 1 common equity, (to risk-weighted assets), Minimum Capital Requirement, Actual Amount			$ 154,613
Tier 1 common equity, (to risk-weighted assets), Minimum Capital Requirement, Ratio (as a percent)		7.00%	6.38%
Capital	$ 405,171		$ 352,360
Capital to Risk Weighted Assets	13.99%		14.53%
Capital Required for Capital Adequacy			$ 239,498
Capital Required for Capital Adequacy to Risk Weighted Assets		10.50%	9.88%
Tier 1 capital (to risk-weighted assets), Actual Amount	$ 313,803		$ 300,589
Tier 1 capital (to risk-weighted assets), Actual Ratio (as a percent)	10.84%		12.39%
Tier 1 capital (to risk-weighted assets), Minimum Capital Requirement, Amount			$ 190,992
Tier 1 capital (to risk-weighted assets), Minimum Capital Requirement, Ratio (as a percent)		8.50%	7.88%
Tier 1 capital (to average assets), Actual Amount	$ 313,803		$ 300,589
Tier 1 capital (to average assets), Actual Ratio (as a percent)	7.64%		9.00%
Tier 1 capital (to average assets), Minimum Capital Requirement, Amount			$ 133,602
Tier 1 capital (to average assets), Minimum Capital Requirement, Ratio (as a percent)		4.00%	4.00%
Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 common equity, (to risk-weighted assets), Actual Amount	$ 341,242		$ 286,012
Tier 1 common equity, (to risk-weighted assets), Actual Ratio (as a percent)	11.80%		11.81%
Tier 1 common equity, (to risk-weighted assets), Minimum Capital Requirement, Actual Amount			$ 154,407
Tier 1 common equity, (to risk-weighted assets), Minimum Capital Requirement, Ratio (as a percent)			6.38%
Tier One Common Equity Required to be Well Capitalized	$ 188,017		$ 157,435
Tier One Common Equity Required to be Well Capitalized to Risk Weighted Assets	6.50%		6.50%
Capital	$ 363,082		$ 300,908
Capital to Risk Weighted Assets	12.55%		12.55%
Capital Required for Capital Adequacy			$ 239,180
Capital Required for Capital Adequacy to Risk Weighted Assets			9.88%
Capital Required to be Well Capitalized	$ 289,257		$ 242,207
Capital Required to be Well Capitalized to Risk Weighted Assets	10.00%		10.00%
Tier 1 capital (to risk-weighted assets), Actual Amount	$ 341,242		$ 286,012
Tier 1 capital (to risk-weighted assets), Actual Ratio (as a percent)	11.80%		11.81%
Tier 1 capital (to risk-weighted assets), Minimum Capital Requirement, Amount			$ 190,738
Tier 1 capital (to risk-weighted assets), Minimum Capital Requirement, Ratio (as a percent)			7.88%
Tier 1 capital (to risk-weighted assets), Minimum to be Wel Capitalized Under Prompt Corrective Actions, Amount	$ 231,406		$ 193,766
Tier 1 capital (to risk-weighted assets), Minimum to be Wel Capitalized Under Prompt Corrective Actions, Ratio (as a percent)	8.00%		8.00%
Tier 1 capital (to average assets), Actual Amount	$ 341,242		$ 286,012
Tier 1 capital (to average assets), Actual Ratio (as a percent)	8.32%		8.57%
Tier 1 capital (to average assets), Minimum Capital Requirement, Amount			$ 133,474
Tier 1 capital (to average assets), Minimum Capital Requirement, Ratio (as a percent)			4.00%
Tier 1 capital (to average assets), Minimum to be Well Capitalized Under Prompt Corrective Actions, Amount	$ 205,151		$ 166,843
Tier 1 capital (to average assets), Minimum to be Well Capitalized Under Prompt Corrective Actions, Ratio (as a percent)	5.00%		5.00%
2016 Period
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 common equity, (to risk-weighted assets), Minimum Capital Requirement, Actual Amount		$ 202,661
Tier 1 common equity, (to risk-weighted assets), Minimum Capital Requirement, Ratio (as a percent)		7.00%
Capital Required for Capital Adequacy		$ 303,991
Capital Required for Capital Adequacy to Risk Weighted Assets		10.50%
Tier 1 capital (to risk-weighted assets), Minimum Capital Requirement, Amount		$ 246,088
Tier 1 capital (to risk-weighted assets), Minimum Capital Requirement, Ratio (as a percent)		8.50%
Tier 1 capital (to average assets), Minimum Capital Requirement, Amount		$ 164,219
Tier 1 capital (to average assets), Minimum Capital Requirement, Ratio (as a percent)		4.00%
2016 Period | Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 common equity, (to risk-weighted assets), Minimum Capital Requirement, Actual Amount		$ 202,480
Tier 1 common equity, (to risk-weighted assets), Minimum Capital Requirement, Ratio (as a percent)		7.00%
Capital Required for Capital Adequacy		$ 303,720
Capital Required for Capital Adequacy to Risk Weighted Assets		10.50%
Tier 1 capital (to risk-weighted assets), Minimum Capital Requirement, Amount		$ 245,869
Tier 1 capital (to risk-weighted assets), Minimum Capital Requirement, Ratio (as a percent)		8.50%
Tier 1 capital (to average assets), Minimum Capital Requirement, Amount		$ 164,121
Tier 1 capital (to average assets), Minimum Capital Requirement, Ratio (as a percent)		4.00%
Two Thousand Fifteen Period
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 common equity, (to risk-weighted assets), Minimum Capital Requirement, Actual Amount		$ 169,771
Tier 1 common equity, (to risk-weighted assets), Minimum Capital Requirement, Ratio (as a percent)		7.00%
Capital Required for Capital Adequacy		$ 254,656
Capital Required for Capital Adequacy to Risk Weighted Assets		10.50%
Tier 1 capital (to risk-weighted assets), Minimum Capital Requirement, Amount		$ 206,150
Tier 1 capital (to risk-weighted assets), Minimum Capital Requirement, Ratio (as a percent)		8.50%
Tier 1 capital (to average assets), Minimum Capital Requirement, Amount		$ 133,602
Tier 1 capital (to average assets), Minimum Capital Requirement, Ratio (as a percent)		4.00%
Two Thousand Fifteen Period | Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 common equity, (to risk-weighted assets), Minimum Capital Requirement, Actual Amount		$ 169,545
Tier 1 common equity, (to risk-weighted assets), Minimum Capital Requirement, Ratio (as a percent)		7.00%
Capital Required for Capital Adequacy		$ 254,318
Capital Required for Capital Adequacy to Risk Weighted Assets		10.50%
Tier 1 capital (to risk-weighted assets), Minimum Capital Requirement, Amount		$ 205,876
Tier 1 capital (to risk-weighted assets), Minimum Capital Requirement, Ratio (as a percent)		8.50%
Tier 1 capital (to average assets), Minimum Capital Requirement, Amount		$ 133,474
Tier 1 capital (to average assets), Minimum Capital Requirement, Ratio (as a percent)		4.00%