Capital Requirements - Tabular Disclosure (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Total Capital (to risk-weighted assets)
Actual, Amount	$ 468,876	$ 457,158
Required For Capital Adequacy Purposes, Amount	$ 331,450	$ 329,306
Actual, Ratio (as a percent)	14.90%	14.60%
Required For Capital Adequacy Purposes, Ratio (as a percent)	10.50%	10.50%
Tier 1 Capital (to risk-weighted assets)
Actual, Amount	$ 389,796	$ 393,432
Required For Capital Adequacy Purposes, Amount	$ 268,317	$ 266,581
Actual, Ratio (as a percent)	12.30%	12.50%
Required For Capital Adequacy Purposes, Ratio (as a percent)	8.50%	8.50%
Common Equity Tier 1 Capital (to risk-weighted assets)
Actual, Amount	$ 389,796	$ 393,432
Required For Capital Adequacy Purposes, Amount	$ 220,967	$ 219,538
Actual, Ratio (as a percent)	12.30%	12.50%
Required For Capital Adequacy Purposes, Ratio (as a percent)	7.00%	7.00%
Tier 1 Capital (to average assets)
Actual, Amount	$ 389,796	$ 393,432
Required For Capital Adequacy Purposes, Amount	$ 153,703	$ 161,677
Actual, Ratio (as a percent)	10.10%	9.70%
Required For Capital Adequacy Purposes, Ratio (as a percent)	4.00%	4.00%
HBC (Wholly-owned Subsidiary)
Total Capital (to risk-weighted assets)
Actual, Amount	$ 444,676	$ 435,757
To Be Well Capitalized Under Regulatory Requirements, Amount	315,256	313,485
Required For Capital Adequacy Purposes, Amount	$ 331,018	$ 329,159
Actual, Ratio (as a percent)	14.10%	13.90%
To Be Well Capitalized Under Regulatory Requirements, Ratio (as a percent)	10.00%	10.00%
Required For Capital Adequacy Purposes, Ratio (as a percent)	10.50%	10.50%
Tier 1 Capital (to risk-weighted assets)
Actual, Amount	$ 405,247	$ 411,585
To Be Well Capitalized Under Regulatory Requirements, Amount	252,204	250,788
Required For Capital Adequacy Purposes, Amount	$ 267,967	$ 266,462
Actual, Ratio (as a percent)	12.90%	13.10%
To Be Well Capitalized Under Regulatory Requirements, Ratio (as a percent)	8.00%	8.00%
Required For Capital Adequacy Purposes, Ratio (as a percent)	8.50%	8.50%
Common Equity Tier 1 Capital (to risk-weighted assets)
Actual, Amount	$ 405,247	$ 411,585
To Be Well Capitalized Under Regulatory Requirements, Amount	204,916	203,765
Required For Capital Adequacy Purposes, Amount	$ 220,679	$ 219,439
Actual, Ratio (as a percent)	12.90%	13.10%
To Be Well Capitalized Under Regulatory Requirements, Ratio (as a percent)	6.50%	6.50%
Required For Capital Adequacy Purposes, Ratio (as a percent)	7.00%	7.00%
Tier 1 Capital (to average assets)
Actual, Amount	$ 405,247	$ 411,585
To Be Well Capitalized Under Regulatory Requirements, Amount	191,927	202,013
Required For Capital Adequacy Purposes, Amount	$ 153,542	$ 161,611
Actual, Ratio (as a percent)	10.60%	10.20%
To Be Well Capitalized Under Regulatory Requirements, Ratio (as a percent)	5.00%	5.00%
Required For Capital Adequacy Purposes, Ratio (as a percent)	4.00%	4.00%