LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES - ALLOWANCE ACTIVITY (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Allowance for loan losses rollforward
Beginning Balance	$ 45,983	$ 45,047	$ 44,675	$ 42,769
Provision for loan and lease losses	3,153	4,077	24,844	26,264
Charged-off	(4,860)	(6,875)	(26,476)	(28,397)
Recoveries	2,656	1,575	3,889	3,188
Ending Balance	46,932	43,824	46,932	43,824
Core Banking Activities
Allowance for loan losses rollforward
Beginning Balance	32,983	31,334	31,519	30,147
Provision for loan and lease losses	2,175	513	4,433	2,246
Charged-off	(1,971)	(671)	(3,374)	(2,195)
Recoveries	300	231	909	1,209
Ending Balance	33,487	31,407	33,487	31,407
Traditional Banking
Allowance for loan losses rollforward
Beginning Balance	31,169	29,749	30,347	28,833
Provision for loan and lease losses	1,555	696	3,171	2,158
Charged-off	(1,971)	(671)	(3,374)	(2,195)
Recoveries	300	231	909	1,209
Ending Balance	31,053	30,005	31,053	30,005
Warehouse Lending
Allowance for loan losses rollforward
Provision for loan and lease losses	620	(183)	1,262	88
Republic Processing Group
Allowance for loan losses rollforward
Beginning Balance	13,000	13,713	13,156	12,622
Provision for loan and lease losses	978	3,564	20,411	24,018
Charged-off	(2,889)	(6,204)	(23,102)	(26,202)
Recoveries	2,356	1,344	2,980	1,979
Ending Balance	13,445	12,417	13,445	12,417
Residential Real Estate - Owner Occupied | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance	5,016	6,035	5,798	6,182
Provision for loan and lease losses	(296)	(136)	(953)	(443)
Charged-off	(17)	(46)	(401)	(85)
Recoveries	121	18	380	217
Ending Balance	4,824	5,871	4,824	5,871
Residential Real Estate - Owner Occupied - Correspondent | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance	197	263	237	292
Provision for loan and lease losses	(18)	(15)	(58)	(44)
Ending Balance	179	248	179	248
Residential Real Estate - Non Owner Occupied | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance	1,775	1,552	1,662	1,396
Provision for loan and lease losses	40	42	218	491
Charged-off		(1)	(73)	(320)
Recoveries	5		13	26
Ending Balance	1,820	1,593	1,820	1,593
Commercial Real Estate | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance	10,566	9,815	10,030	9,043
Provision for loan and lease losses	1,390	187	1,922	831
Charged-off	(1,407)		(1,407)
Recoveries		1	4	129
Ending Balance	10,549	10,003	10,549	10,003
Construction & land development | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance	2,910	2,825	2,555	2,364
Provision for loan and lease losses	(93)	(160)	262	274
Recoveries		3		30
Ending Balance	2,817	2,668	2,817	2,668
Commercial & industrial | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance	4,221	2,318	2,873	2,198
Provision for loan and lease losses	155	281	1,498	491
Charged-off		(75)		(200)
Recoveries	1	4	6	39
Ending Balance	4,377	2,528	4,377	2,528
Lease Financing Receivables | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance	181	160	158	174
Provision for loan and lease losses	(25)		(2)	(14)
Ending Balance	156	160	156	160
Home equity lines of credit | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance	3,124	3,658	3,477	3,754
Provision for loan and lease losses	(102)	(81)	(480)	(372)
Charged-off		(14)	(13)	(48)
Recoveries	23	59	61	288
Ending Balance	3,045	3,622	3,045	3,622
Consumer: Credit cards | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance	1,028	805	1,140	607
Provision for loan and lease losses	54	148	133	507
Charged-off	(77)	(94)	(303)	(282)
Recoveries	18	9	53	36
Ending Balance	1,023	868	1,023	868
Consumer: Overdrafts | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance	894	878	1,102	974
Provision for loan and lease losses	491	372	760	685
Charged-off	(363)	(332)	(956)	(891)
Recoveries	53	65	169	215
Ending Balance	1,075	983	1,075	983
Consumer: Automobile loan | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance	708	664	724	687
Provision for loan and lease losses	(32)	110	(55)	90
Charged-off	(23)	(7)	(23)	(11)
Recoveries		2	7	3
Ending Balance	653	769	653	769
Other consumer | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance	549	776	591	1,162
Provision for loan and lease losses	(9)	(52)	(74)	(338)
Charged-off	(84)	(102)	(198)	(358)
Recoveries	79	70	216	226
Ending Balance	535	692	535	692
Warehouse lines of credit | Core Banking Activities
Allowance for loan losses rollforward
Beginning Balance	1,814	1,585	1,172	1,314
Provision for loan and lease losses	620	(183)	1,262	88
Ending Balance	2,434	1,402	2,434	1,402
Easy Advances | Republic Processing Group
Allowance for loan losses rollforward
Provision for loan and lease losses	(2,098)	(1,036)	11,322	11,360
Charged-off			(13,425)	(12,478)
Recoveries	2,098	1,036	2,103	1,118
Other TRS loans | Republic Processing Group
Allowance for loan losses rollforward
Beginning Balance	232	67	107	12
Provision for loan and lease losses	90	8	496	113
Charged-off	(90)		(371)	(55)
Recoveries	2		2	5
Ending Balance	234	75	234	75
Republic Credit Solutions | Republic Processing Group
Allowance for loan losses rollforward
Beginning Balance	12,768	13,646	13,049	12,610
Provision for loan and lease losses	2,986	4,592	8,593	12,545
Charged-off	(2,799)	(6,204)	(9,306)	(13,669)
Recoveries	256	308	875	856
Ending Balance	$ 13,211	$ 12,342	$ 13,211	$ 12,342