Business Segment Information - Operating Statements (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Income
Interest income	$ 35,378,000	$ 34,610,000	$ 31,980,000	$ 27,877,000	$ 28,152,000	$ 27,955,000	$ 26,107,000	$ 24,697,000	$ 129,845,000	$ 106,911,000	$ 94,431,000
Total interest expense	2,318,000	2,159,000	1,816,000	1,529,000	1,708,000	1,634,000	1,174,000	871,000	7,822,000	5,387,000	3,211,000
Net interest income	33,060,000	32,451,000	30,164,000	26,348,000	26,444,000	26,321,000	24,933,000	23,826,000	122,023,000	101,524,000	91,220,000
Provision for loan losses	142,000	(425,000)	7,198,000	506,000	(291,000)	115,000	(46,000)	321,000	7,421,000	99,000	1,237,000
Net interest income after provision	32,918,000	32,876,000	22,966,000	25,842,000	26,735,000	26,206,000	24,979,000	23,505,000	114,602,000	101,425,000	89,983,000
Noninterest income	2,393,000	2,206,000	2,780,000	2,195,000	2,564,000	2,460,000	2,293,000	2,295,000	9,574,000	9,612,000	11,625,000
Noninterest expense	16,941,000	17,728,000	24,862,000	15,990,000	15,322,000	14,834,000	15,254,000	15,328,000	75,521,000	60,738,000	57,639,000
Income before income taxes	18,370,000	17,354,000	884,000	12,047,000	13,977,000	13,832,000	12,018,000	10,472,000	48,655,000	50,299,000	43,969,000
Income tax expense	5,138,000	4,979,000	(31,000)	3,238,000	12,719,000	5,249,000	4,569,000	3,934,000	13,324,000	26,471,000	16,588,000
Net income	13,232,000	12,375,000	915,000	8,809,000	1,258,000	$ 8,583,000	$ 7,449,000	$ 6,538,000	35,331,000	23,828,000	27,381,000
Total assets	3,096,562,000				2,843,452,000				3,096,562,000	2,843,452,000	2,570,880,000
Loans, net of deferred fees	1,886,405,000				1,582,667,000				1,886,405,000	1,582,667,000	1,502,607,000
Goodwill	83,753,000				45,664,000				83,753,000	45,664,000	45,664,000
Business Combination One time pre-tax severance, retention, acquisition and integration costs									9,167,000	671,000
Pre-tax acquisition costs	139,000	$ 199,000	$ 8,214,000	$ 615,000	671,000					671,000
Tax Cuts and Jobs Act of 2017 effect on re-measurement of net deferred tax assets					7,103,000					7,103,000
Banking
Operating Income
Interest income									115,147,000	95,027,000	82,175,000
Intersegment interest allocations									1,856,000	1,126,000	1,163,000
Total interest expense									7,822,000	5,387,000	3,211,000
Net interest income									109,181,000	90,766,000	80,127,000
Provision for loan losses									7,224,000	102,000	1,181,000
Net interest income after provision									101,957,000	90,664,000	78,946,000
Noninterest income									8,662,000	8,559,000	10,821,000
Noninterest expense									69,164,000	53,860,000	50,298,000
Intersegment expense allocations									753,000	528,000	804,000
Income before income taxes									42,208,000	45,891,000	40,273,000
Income tax expense									11,418,000	24,266,000	15,036,000
Net income									30,790,000	21,625,000	25,237,000
Total assets	3,028,721,000				2,780,286,000				3,028,721,000	2,780,286,000	2,507,121,000
Loans, net of deferred fees	1,832,815,000				1,533,841,000				1,832,815,000	1,533,841,000	1,452,991,000
Goodwill	70,709,000				32,620,000				70,709,000	32,620,000	32,620,000
Pre-tax acquisition costs									9,167,000
Tax Cuts and Jobs Act of 2017 effect on re-measurement of net deferred tax assets										6,749,000
Factoring
Operating Income
Interest income									14,698,000	11,884,000	12,256,000
Intersegment interest allocations									(1,856,000)	(1,126,000)	(1,163,000)
Net interest income									12,842,000	10,758,000	11,093,000
Provision for loan losses									197,000	(3,000)	56,000
Net interest income after provision									12,645,000	10,761,000	11,037,000
Noninterest income									912,000	1,053,000	804,000
Noninterest expense									6,357,000	6,878,000	7,341,000
Intersegment expense allocations									(753,000)	(528,000)	(804,000)
Income before income taxes									6,447,000	4,408,000	3,696,000
Income tax expense									1,906,000	2,205,000	1,552,000
Net income									4,541,000	2,203,000	2,144,000
Total assets	67,841,000				63,166,000				67,841,000	63,166,000	63,759,000
Loans, net of deferred fees	53,590,000				48,826,000				53,590,000	48,826,000	49,616,000
Goodwill	13,044,000				13,044,000				13,044,000	13,044,000	13,044,000
Tax Cuts and Jobs Act of 2017 effect on re-measurement of net deferred tax assets										354,000
HCC (Parent)
Operating Income
Total interest expense									2,315,000	1,394,000	11,000
Income before income taxes									11,655,000	12,450,000	15,421,000
Income tax expense									(1,515,000)	(1,300,000)	(1,063,000)
Net income									35,331,000	23,828,000	$ 27,381,000
Total assets	$ 407,068,000				$ 310,626,000				$ 407,068,000	$ 310,626,000