Parent Company only Condensed Financial Information - Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Condensed statements of income
Interest expense	$ (1,940)	$ (2,087)	$ (2,192)	$ (2,362)	$ (3,242)	$ (2,625)	$ (2,573)	$ (2,407)	$ (8,581)	$ (10,847)	$ (7,822)
Income before income taxes	16,052	15,395	14,892	2,729	7,773	15,910	15,976	16,653	49,068	56,312	48,655
Income tax benefit	(4,429)	(4,198)	(4,274)	(868)	(2,088)	(4,633)	(4,623)	(4,507)	(13,769)	(15,851)	(13,324)
Net income	$ 11,623	$ 11,197	$ 10,618	$ 1,861	$ 5,685	$ 11,277	$ 11,353	$ 12,146	35,299	40,461	35,331
HCC (Parent)
Condensed statements of income
Dividend from subsidiary bank									32,000	22,500	17,000
Other Income										121
Interest expense									(2,321)	(2,314)	(2,315)
Other expenses									(3,263)	(3,084)	(3,030)
Income before income taxes									26,416	17,223	11,655
Equity in undistributed net income of subsidiary bank									7,255	21,757	22,161
Income tax benefit									1,628	1,481	1,515
Net income									$ 35,299	$ 40,461	$ 35,331