LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES - COMPOSITION OF LOANS (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015
Loans disclosures
Total loans	$ 3,916,320		$ 3,810,778
Allowance for loan and lease losses	(37,898)	$ (42,362)	(32,920)	$ (29,308)	$ (31,475)	$ (27,491)
Loans, net	3,878,422		3,777,858
Core Banking Activities
Loans disclosures
Total loans	3,874,210		3,771,831
Allowance for loan and lease losses	(29,251)	(27,990)	(27,928)	(26,857)	(26,006)	(25,792)
Traditional Banking
Loans disclosures
Total loans	3,273,580		3,186,392
Allowance for loan and lease losses	(27,749)	(26,752)	(26,464)	(25,392)	(25,021)	(24,825)
Republic Processing Group
Loans disclosures
Total loans	42,110		38,947
Allowance for loan and lease losses	(8,647)	(14,372)	(4,992)	(2,451)	(5,469)	(1,699)
Residential Real Estate - Owner Occupied | Traditional Banking
Loans disclosures
Total loans	961,405		1,000,148
Allowance for loan and lease losses	(6,740)	(7,071)	(7,158)	(7,893)	(8,049)	(8,301)
Residential Real Estate - Owner Occupied - Correspondent | Traditional Banking
Loans disclosures
Total loans	129,792		149,028
Allowance for loan and lease losses	(324)	(353)	(373)	(592)	(607)	(623)
Residential Real Estate - Non Owner Occupied | Traditional Banking
Loans disclosures
Total loans	172,684		156,605
Allowance for loan and lease losses	(1,237)	(1,198)	(1,139)	(1,052)	(1,095)	(1,052)
Commercial Real Estate | Traditional Banking
Loans disclosures
Total loans	1,104,026		1,060,496
Allowance for loan and lease losses	(8,368)	(7,898)	(8,078)	(7,805)	(7,678)	(7,672)
Construction & land development | Traditional Banking
Loans disclosures
Total loans	137,877		119,650
Allowance for loan and lease losses	(2,508)	(2,233)	(1,850)	(1,332)	(1,348)	(1,303)
Commercial & Industrial | Traditional Banking
Loans disclosures
Total loans	314,433		259,026
Allowance for loan and lease losses	(1,682)	(1,488)	(1,511)	(1,441)	(1,384)	(1,455)
Commercial & Industrial | Republic Processing Group
Loans disclosures
Total loans			6,695
Allowance for loan and lease losses			(25)
Lease Financing Receivables | Traditional Banking
Loans disclosures
Total loans	14,371		13,614
Allowance for loan and lease losses	(151)	(145)	(136)	(115)	(97)	(89)
Home equity lines of credit | Traditional Banking
Loans disclosures
Total loans	344,946		341,285
Allowance for loan and lease losses	(3,787)	(3,831)	(3,757)	(3,016)	(3,054)	(2,996)
Consumer: Credit cards | Traditional Banking
Loans disclosures
Total loans	17,879		13,414
Allowance for loan and lease losses	(588)	(506)	(490)	(456)	(466)	(448)
Consumer: Overdrafts | Traditional Banking
Loans disclosures
Total loans	902		803
Allowance for loan and lease losses	(806)	(641)	(675)	(824)	(450)	(351)
Consumer: Automobile loan | Traditional Banking
Loans disclosures
Total loans	59,921		52,579
Allowance for loan and lease losses	(640)	(563)	(526)	(281)	(145)	(56)
Other consumer | Traditional Banking
Loans disclosures
Total loans	15,344		19,744
Allowance for loan and lease losses	(918)	(825)	(771)	(585)	(648)	(479)
Warehouse lines of credit | Warehouse Lending
Loans disclosures
Total loans	600,630		585,439
Allowance for loan and lease losses	(1,502)	(1,238)	(1,464)	(1,465)	(985)	(967)
Easy Advances | Republic Processing Group
Loans disclosures
Allowance for loan and lease losses		(7,741)			(3,169)
Republic Credit Solutions | Republic Processing Group
Loans disclosures
Total loans	42,110		32,252
Allowance for loan and lease losses	$ (8,647)	$ (6,631)	$ (4,967)	$ (2,451)	$ (2,300)	$ (1,699)