Parent Company only Condensed Financial Information - Statements of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net income	$ 4,423	$ 3,459	$ 4,477	$ 4,138	$ 3,602	$ 3,425	$ 3,324	$ 3,076	$ 16,497	$ 13,427	$ 11,540
Adjustments to reconcile net income to net cash provided by (used in) operations:
Amortization of restricted stock award, net									265	(9)	200
Net Cash Provided by (used in) Operating Activities, continuing operations									28,494	19,384	16,263
Cash flows from financing activities:
Repayment of subordinated debt											(9,279)
Net change in purchased funds and other short-term borrowings									3,000
Proceeds from issuance of common stock, net of issuance costs									315	262	88
Payment of repurchase of common stock warrant											(140)
Net cash provided by (used in) financing activities									261,699	65,022	(204,394)
Net increase (decrease) in cash and cash equivalents									221,689	9,798	(260,960)
Cash and cash equivalents, beginning of period				122,403				112,605	122,403	112,605	373,565
Cash and cash equivalents, end of period	344,092				122,403				344,092	122,403	112,605
HCC (Parent)
Cash flows from operating activities:
Net income									16,497	13,427	11,540
Adjustments to reconcile net income to net cash provided by (used in) operations:
Amortization of restricted stock award, net									265	(9)	200
Equity in undistributed loss/(net income) of subsidiary bank									(18,081)	(14,614)	2,845
Net change in other assets and liabilities									269	(2,158)	4,478
Net Cash Provided by (used in) Operating Activities, continuing operations									(1,050)	(3,354)	19,063
Cash flows from financing activities:
Repayment of subordinated debt											(9,279)
Net change in purchased funds and other short-term borrowings									3,000
Payment of cash dividends									(10,738)	(5,758)	(1,916)
Proceeds from issuance of common stock, net of issuance costs									315	262	88
Payment of repurchase of common stock warrant											(140)
Net cash provided by (used in) financing activities									(7,423)	(5,496)	(11,247)
Net increase (decrease) in cash and cash equivalents									(8,473)	(8,850)	7,816
Cash and cash equivalents, beginning of period				$ 10,159				$ 19,009	10,159	19,009	11,193
Cash and cash equivalents, end of period	$ 1,686				$ 10,159				$ 1,686	$ 10,159	$ 19,009