LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES - ALLOWANCE ACTIVITY (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Allowance for loan losses rollforward
Beginning Balance	$ 37,898	$ 29,308	$ 32,920	$ 27,491
Provision for loan and lease losses	4,221	2,489	21,633	9,489
Charged-off	(3,369)	(2,071)	(17,250)	(8,617)
Recoveries	1,441	710	2,888	2,073
Ending Balance	40,191	30,436	40,191	30,436
Core Banking Activities
Allowance for loan losses rollforward
Beginning Balance	29,251	26,857	27,928	25,792
Provision for loan and lease losses	609	477	2,575	2,253
Charged-off	(689)	(723)	(1,911)	(2,139)
Recoveries		480	954	1,185
Ending Balance	29,546	27,091	29,546	27,091
Traditional Banking
Allowance for loan losses rollforward
Beginning Balance	27,749	25,392	26,464	24,825
Provision for loan and lease losses	683	289	2,611	1,567
Charged-off	(689)	(723)	(1,911)	(2,139)
Recoveries	375	480	954	1,185
Ending Balance	28,118	25,438	28,118	25,438
Warehouse Lending
Allowance for loan losses rollforward
Provision for loan and lease losses	(74)	188	(36)	686
Republic Processing Group
Allowance for loan losses rollforward
Beginning Balance	8,647	2,451	4,992	1,699
Provision for loan and lease losses	3,612	2,012	19,058	7,236
Charged-off	(2,680)	(1,348)	(15,339)	(6,478)
Recoveries	1,066	230	1,934	888
Ending Balance	10,645	3,345	10,645	3,345
Residential Real Estate - Owner Occupied | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance	6,740	7,893	7,158	8,301
Provision for loan and lease losses	(222)	(562)	(653)	(860)
Charged-off	(52)	(56)	(163)	(317)
Recoveries	107	142	231	293
Ending Balance	6,573	7,417	6,573	7,417
Residential Real Estate - Owner Occupied - Correspondent | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance	324	592	373	623
Provision for loan and lease losses	(10)	(200)	(59)	(231)
Ending Balance	314	392	314	392
Residential Real Estate - Non Owner Occupied | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance	1,237	1,052	1,139	1,052
Provision for loan and lease losses	100	113	212	105
Charged-off			(14)
Recoveries				8
Ending Balance	1,337	1,165	1,337	1,165
Commercial Real Estate | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance	8,368	7,805	8,078	7,672
Provision for loan and lease losses	325	192	577	260
Charged-off				(41)
Recoveries	77	34	115	140
Ending Balance	8,770	8,031	8,770	8,031
Construction & land development | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance	2,508	1,332	1,850	1,303
Provision for loan and lease losses	(435)	66	222	119
Charged-off				(44)
Recoveries	3	10	4	30
Ending Balance	2,076	1,408	2,076	1,408
Commercial & Industrial | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance	1,682	1,441	1,511	1,455
Provision for loan and lease losses	388	(182)	537	130
Charged-off	(152)		(152)	(330)
Recoveries	12	121	34	125
Ending Balance	1,930	1,380	1,930	1,380
Commercial & Industrial | Republic Processing Group
Allowance for loan losses rollforward
Beginning Balance			25
Provision for loan and lease losses			(25)
Lease Financing Receivables | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance	151	115	136	89
Provision for loan and lease losses	11	13	26	39
Ending Balance	162	128	162	128
Home equity lines of credit | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance	3,787	3,016	3,757	2,996
Provision for loan and lease losses	14	633	62	633
Charged-off	(4)	(145)	(99)	(229)
Recoveries	51	31	128	135
Ending Balance	3,848	3,535	3,848	3,535
Consumer: Credit cards | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance	588	456	490	448
Provision for loan and lease losses	50	105	181	163
Charged-off	(38)	(91)	(86)	(153)
Recoveries	6	17	21	29
Ending Balance	606	487	606	487
Consumer: Overdrafts | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance	806	824	675	351
Provision for loan and lease losses	311	(34)	731	639
Charged-off	(276)	(239)	(687)	(571)
Recoveries	51	55	173	187
Ending Balance	892	606	892	606
Consumer: Automobile loan | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance	640	281	526	56
Provision for loan and lease losses	40	178	160	402
Charged-off	(12)	(12)	(19)	(12)
Recoveries	1		2	1
Ending Balance	669	447	669	447
Other consumer | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance	918	585	771	479
Provision for loan and lease losses	111	(33)	615	168
Charged-off	(155)	(180)	(691)	(442)
Recoveries	67	70	246	237
Ending Balance	941	442	941	442
Warehouse lines of credit | Warehouse Lending
Allowance for loan losses rollforward
Beginning Balance	1,502	1,465	1,464	967
Provision for loan and lease losses	(74)	188	(36)	686
Ending Balance	1,428	1,653	1,428	1,653
Easy Advances | Republic Processing Group
Allowance for loan losses rollforward
Provision for loan and lease losses	(840)	(89)	7,041	3,127
Charged-off			(8,123)	(3,474)
Recoveries	840	89	1,082	347
Refund Anticipation Loans | Republic Processing Group
Allowance for loan losses rollforward
Provision for loan and lease losses			(253)	(222)
Recoveries			253	222
Republic Credit Solutions | Republic Processing Group
Allowance for loan losses rollforward
Beginning Balance	8,647	2,451	4,967	1,699
Provision for loan and lease losses	4,452	2,101	12,295	4,331
Charged-off	(2,680)	(1,348)	(7,216)	(3,004)
Recoveries	226	141	599	319
Ending Balance	$ 10,645	$ 3,345	$ 10,645	$ 3,345