LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES - COMPOSITION OF LOANS (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Loans disclosures
Total loans	$ 3,823,031		$ 3,326,610
Allowance for loan losses	(30,436)	$ (29,308)	(27,491)	$ (26,959)	$ (25,248)	$ (24,410)
Loans, net	3,792,595		3,299,119
Residential Real Estate - Owner Occupied
Loans disclosures
Total loans	1,028,471		1,081,934
Allowance for loan losses	(7,417)	(7,893)	(8,301)	(8,455)	(8,202)	(8,565)
Owner Occupied - Correspondent
Loans disclosures
Total loans	159,955		249,344
Allowance for loan losses	(392)	(592)	(623)	(615)	(608)	(567)
Residential Real Estate - Non Owner Occupied
Loans disclosures
Total loans	149,610		116,294
Allowance for loan losses	(1,165)	(1,052)	(1,052)	(890)	(904)	(837)
Commercial Real Estate
Loans disclosures
Total loans	999,852		824,887
Allowance for loan losses	(7,995)	(7,769)	(7,636)	(8,013)	(7,840)	(7,740)
Commercial real estate - purchased whole loans
Loans disclosures
Total loans	36,085		35,674
Allowance for loan losses	(36)	(36)	(36)	(35)	(35)	(34)
Construction & land development
Loans disclosures
Total loans	94,289		66,500
Allowance for loan losses	(1,408)	(1,332)	(1,303)	(1,131)	(1,100)	(926)
Commercial & Industrial
Loans disclosures
Total loans	250,094		229,721
Allowance for loan losses	(1,380)	(1,441)	(1,455)	(1,444)	(1,191)	(1,167)
Lease Financing Receivables
Loans disclosures
Total loans	12,186		8,905
Allowance for loan losses	(128)	(115)	(89)	(83)	(76)	(25)
Warehouse lines of credit
Loans disclosures
Total loans	661,186		386,729
Allowance for loan losses	(1,653)	(1,465)	(967)	(984)	(1,222)	(799)
Home equity lines of credit
Loans disclosures
Total loans	335,116		289,194
Allowance for loan losses	(3,535)	(3,016)	(2,996)	(2,833)	(2,765)	(2,730)
Consumer: Republic Processing Group Loans
Loans disclosures
Total loans	16,453		7,204
Allowance for loan losses	(3,345)	(2,451)	(1,699)	(1,227)	(252)	(44)
Consumer: Credit cards
Loans disclosures
Total loans	12,581		11,068
Allowance for loan losses	(487)	(456)	(448)	(415)	(399)	(285)
Consumer: Overdrafts
Loans disclosures
Total loans	795		685
Allowance for loan losses	(606)	(824)	(351)	(335)	(286)	(382)
Consumer: Purchased Whole Loans
Loans disclosures
Total loans	6,895		5,892
Allowance for loan losses	(489)	(535)	(392)	(337)	(207)	(185)
Other consumer
Loans disclosures
Total loans	59,463		12,579
Allowance for loan losses	$ (400)	$ (331)	$ (143)	$ (162)	$ (161)	$ (124)