Capital Requirements - Tabular Disclosure (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Total Capital (to risk-weighted assets)
Actual, Amount	$ 234,629	$ 218,915
Required For Capital Adequacy Purposes, Amount	$ 161,868	$ 140,041
Actual, Ratio (as a percent)	12.50%	12.50%
Required For Capital Adequacy Purposes, Ratio (as a percent)	8.625%	8.00%
Capital conservation buffer (as a percent)	0.625%
Tier 1 Capital (to risk-weighted assets)
Actual, Amount	$ 214,924	$ 199,299
Required For Capital Adequacy Purposes, Amount	$ 124,333	$ 105,031
Actual, Ratio (as a percent)	11.50%	11.40%
Required For Capital Adequacy Purposes, Ratio (as a percent)	6.625%	6.00%
Common Equity Tier 1 Capital (to risk-weighted assets)
Actual, Amount	$ 214,924	$ 181,221
Required For Capital Adequacy Purposes, Amount	$ 96,183	$ 78,773
Actual, Ratio (as a percent)	11.50%	10.40%
Required For Capital Adequacy Purposes, Ratio (as a percent)	5.125%	4.50%
Tier 1 Capital (to average assets)
Actual, Amount	$ 214,924	$ 199,299
Required For Capital Adequacy Purposes, Amount	$ 100,625	$ 92,918
Actual, Ratio (as a percent)	8.50%	8.60%
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	$ 231,069	$ 219,943
To Be Well Capitalized Under Regulatory Requirements, Amount	187,602	175,022
Required For Capital Adequacy Purposes, Amount	$ 161,807	$ 140,018
Actual, Ratio (as a percent)	12.30%	12.60%
To Be Well Capitalized Under Regulatory Requirements, Ratio (as a percent)	10.00%	10.00%
Required For Capital Adequacy Purposes, Ratio (as a percent)	8.625%	8.00%
Capital conservation buffer (as a percent)	0.625%
Tier 1 Capital (to risk-weighted assets)
Actual, Amount	$ 211,364	$ 200,327
To Be Well Capitalized Under Regulatory Requirements, Amount	150,082	140,018
Required For Capital Adequacy Purposes, Amount	$ 124,287	$ 105,013
Actual, Ratio (as a percent)	11.30%	11.40%
To Be Well Capitalized Under Regulatory Requirements, Ratio (as a percent)	8.00%	8.00%
Required For Capital Adequacy Purposes, Ratio (as a percent)	6.625%	6.00%
Common Equity Tier 1 Capital (to risk-weighted assets)
Actual, Amount	$ 211,364	$ 200,327
To Be Well Capitalized Under Regulatory Requirements, Amount	121,942	113,764
Required For Capital Adequacy Purposes, Amount	$ 96,146	$ 78,760
Actual, Ratio (as a percent)	11.30%	11.40%
To Be Well Capitalized Under Regulatory Requirements, Ratio (as a percent)	6.50%	6.50%
Required For Capital Adequacy Purposes, Ratio (as a percent)	5.125%	4.50%
Tier 1 Capital (to average assets)
Actual, Amount	$ 211,364	$ 200,327
To Be Well Capitalized Under Regulatory Requirements, Amount	125,746	116,112
Required For Capital Adequacy Purposes, Amount	$ 100,597	$ 92,889
Actual, Ratio (as a percent)	8.40%	8.60%
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%