Capital Requirements - General Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Capital Requirements
Phase-in period (in years)			4 years
Capital conservation buffer (as a percent)			1.25%	0.625%
Subordinated Debt.			$ 39,183,000
Dividends paid to parent company			16,000,000	$ 18,000,000
Forecast
Capital Requirements
Capital conservation buffer (as a percent)	2.50%	1.875%
HCC (Parent)
Capital Requirements
Subordinated Debt.			$ 39,183,000
HBC (Wholly-owned Subsidiary)
Capital Requirements
Capital conservation buffer (as a percent)			1.25%	0.625%