Parent Company only Condensed Financial Information - Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Assets
Cash and cash equivalents	$ 457,370	$ 164,568
Total assets	4,109,463	3,096,562	$ 2,843,452
Liabilities and Shareholders' Equity
Subordinated debt, net of issuance costs	39,554	39,369
Shareholder's equity	576,708	367,466	$ 271,239	$ 259,850
Total liabilities and shareholders' equity	4,109,463	3,096,562
HCC (Parent)
Assets
Cash and cash equivalents	20,260	21,358
Investment in subsidiary bank	594,868	384,516
Other assets	1,761	1,194
Total assets	616,889	407,068
Liabilities and Shareholders' Equity
Subordinated debt, net of issuance costs	39,554	39,369
Other liabilities	627	233
Shareholder's equity	576,708	367,466
Total liabilities and shareholders' equity	$ 616,889	$ 407,068