Capital Requirements - Tabular Disclosure (Details) $ in Thousands	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Total Capital (to risk-weighted assets)
Actual, Amount	$ 473,095	$ 457,158
Required For Capital Adequacy Purposes, Amount	$ 313,273	$ 329,306
Actual, Ratio (as a percent)	0.159	0.146
Required For Capital Adequacy Purposes, Ratio (as a percent)	0.105	0.105
Tier 1 Capital (to risk-weighted assets)
Actual, Amount	$ 396,142	$ 393,432
Required For Capital Adequacy Purposes, Amount	$ 253,602	$ 266,581
Actual, Ratio (as a percent)	0.133	0.125
Required For Capital Adequacy Purposes, Ratio (as a percent)	0.085	0.085
Common Equity Tier 1 Capital (to risk-weighted assets)
Actual, Amount	$ 396,142	$ 393,432
Required For Capital Adequacy Purposes, Amount	$ 208,849	$ 219,538
Actual, Ratio (as a percent)	0.133%	0.125%
Required For Capital Adequacy Purposes, Ratio (as a percent)	0.07%	0.07%
Tier 1 Capital (to average assets)
Actual, Amount	$ 396,142	$ 393,432
Required For Capital Adequacy Purposes, Amount	$ 169,290	$ 161,677
Actual, Ratio (as a percent)	0.094	0.097
Required For Capital Adequacy Purposes, Ratio (as a percent)	0.040	0.040
HBC (Wholly-owned Subsidiary)
Total Capital (to risk-weighted assets)
Actual, Amount	$ 450,839	$ 435,757
To Be Well Capitalized Under Regulatory Requirements, Amount	298,153	313,485
Required For Capital Adequacy Purposes, Amount	$ 313,060	$ 329,159
Actual, Ratio (as a percent)	0.151	0.139
To Be Well Capitalized Under Regulatory Requirements, Ratio (as a percent)	0.100	0.100
Required For Capital Adequacy Purposes, Ratio (as a percent)	0.105	0.105
Tier 1 Capital (to risk-weighted assets)
Actual, Amount	$ 413,557	$ 411,585
To Be Well Capitalized Under Regulatory Requirements, Amount	238,522	250,788
Required For Capital Adequacy Purposes, Amount	$ 253,430	$ 266,462
Actual, Ratio (as a percent)	0.139	0.131
To Be Well Capitalized Under Regulatory Requirements, Ratio (as a percent)	0.080	0.080
Required For Capital Adequacy Purposes, Ratio (as a percent)	0.085	0.085
Common Equity Tier 1 Capital (to risk-weighted assets)
Actual, Amount	$ 413,557	$ 411,585
To Be Well Capitalized Under Regulatory Requirements, Amount	193,799	203,765
Required For Capital Adequacy Purposes, Amount	$ 208,707	$ 219,439
Actual, Ratio (as a percent)	0.139%	0.131%
To Be Well Capitalized Under Regulatory Requirements, Ratio (as a percent)	0.065%	0.065%
Required For Capital Adequacy Purposes, Ratio (as a percent)	0.07%	0.07%
Tier 1 Capital (to average assets)
Actual, Amount	$ 413,557	$ 411,585
To Be Well Capitalized Under Regulatory Requirements, Amount	211,518	202,013
Required For Capital Adequacy Purposes, Amount	$ 169,214	$ 161,611
Actual, Ratio (as a percent)	0.098	0.102
To Be Well Capitalized Under Regulatory Requirements, Ratio (as a percent)	0.050	0.050
Required For Capital Adequacy Purposes, Ratio (as a percent)	0.040	0.040