LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES - ALLOWANCE ACTIVITY (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allowance for loan losses rollforward
Beginning Balance				$ 44,675				$ 42,769	$ 44,675	$ 42,769	$ 32,920
Provision for loan and lease losses	$ 914	$ 3,153	$ 4,460	17,231	$ 5,104	$ 4,077	$ 4,932	17,255	25,758	31,368	27,704
Charged-off									(32,396)	(33,852)	(21,563)
Recoveries									5,314	4,390	3,708
Ending Balance	43,351				44,675				43,351	44,675	42,769
Core Banking Activities
Allowance for loan losses rollforward
Beginning Balance				31,519				30,147	31,519	30,147	27,928
Provision for loan and lease losses									3,066	3,568	3,773
Charged-off									(5,713)	(3,608)	(2,783)
Recoveries									1,127	1,412	1,229
Ending Balance	29,999				31,519				29,999	31,519	30,147
Traditional Banking
Allowance for loan losses rollforward
Beginning Balance				30,347				28,833	30,347	28,833	26,464
Provision for loan and lease losses									2,444	3,710	3,923
Charged-off									(5,713)	(3,608)	(2,783)
Recoveries									1,127	1,412	1,229
Ending Balance	28,205				30,347				28,205	30,347	28,833
Warehouse Lending
Allowance for loan losses rollforward
Provision for loan and lease losses									622	(142)	(150)
Republic Processing Group
Allowance for loan losses rollforward
Beginning Balance				13,156				12,622	13,156	12,622	4,992
Provision for loan and lease losses									22,692	27,800	23,931
Charged-off									(26,683)	(30,244)	(18,780)
Recoveries									4,187	2,978	2,479
Ending Balance	13,352				13,156				13,352	13,156	12,622
Residential Real Estate - Owner Occupied | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance				6,035				6,474	6,035	6,474	7,531
Provision for loan and lease losses									(1,087)	170	(1,014)
Charged-off									(610)	(855)	(300)
Recoveries									391	246	257
Ending Balance	4,729				6,035				4,729	6,035	6,474
Residential Real Estate - Non Owner Occupied | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance				1,662				1,396	1,662	1,396	1,139
Provision for loan and lease losses									125	559	272
Charged-off									(73)	(332)	(30)
Recoveries									23	39	15
Ending Balance	1,737				1,662				1,737	1,662	1,396
Commercial Real Estate | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance				10,030				9,043	10,030	9,043	8,078
Provision for loan and lease losses									1,859	863	826
Charged-off									(1,407)	(7)
Recoveries									4	131	139
Ending Balance	10,486				10,030				10,486	10,030	9,043
Construction & land development | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance				2,555				2,364	2,555	2,364	1,850
Provision for loan and lease losses									(403)	161	508
Recoveries										30	6
Ending Balance	2,152				2,555				2,152	2,555	2,364
Commercial & industrial | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance				2,873				2,198	2,873	2,198	1,511
Provision for loan and lease losses									1,505	824	842
Charged-off									(1,505)	(200)	(189)
Recoveries									9	51	34
Ending Balance	2,882				2,873				2,882	2,873	2,198
Lease Financing Receivables | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance				158				174	158	174	136
Provision for loan and lease losses									(11)	(16)	38
Ending Balance	147				158				147	158	174
Home equity lines of credit | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance				3,477				3,754	3,477	3,754	3,757
Provision for loan and lease losses									(764)	(473)	37
Charged-off									(64)	(115)	(222)
Recoveries									72	311	182
Ending Balance	2,721				3,477				2,721	3,477	3,754
Consumer: Credit cards | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance				1,140				607	1,140	607	490
Provision for loan and lease losses									226	906	247
Charged-off									(402)	(416)	(168)
Recoveries									56	43	38
Ending Balance	1,020				1,140				1,020	1,140	607
Consumer: Overdrafts | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance				1,102				974	1,102	974	675
Provision for loan and lease losses									1,155	1,082	1,031
Charged-off									(1,310)	(1,215)	(960)
Recoveries									222	261	228
Ending Balance	1,169				1,102				1,169	1,102	974
Consumer: Automobile loan | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance				724				687	724	687	526
Provision for loan and lease losses									(42)	57	188
Charged-off									(79)	(24)	(30)
Recoveries									9	4	3
Ending Balance	612				724				612	724	687
Other consumer | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance				591				1,162	591	1,162	771
Provision for loan and lease losses									(119)	(423)	948
Charged-off									(263)	(444)	(884)
Recoveries									341	296	327
Ending Balance	550				591				550	591	1,162
Warehouse lines of credit | Warehouse Lending
Allowance for loan losses rollforward
Beginning Balance				1,172				1,314	1,172	1,314	1,464
Provision for loan and lease losses									622	(142)	(150)
Ending Balance	1,794				1,172				1,794	1,172	1,314
Easy Advances | Republic Processing Group
Allowance for loan losses rollforward
Provision for loan and lease losses									10,643	10,760	6,789
Charged-off									(13,425)	(12,478)	(8,121)
Recoveries									2,782	1,718	1,332
Other TRS loans | Republic Processing Group
Allowance for loan losses rollforward
Beginning Balance				107				12	107	12	25
Provision for loan and lease losses									606	159	(254)
Charged-off									(692)	(74)
Recoveries									213	10	241
Ending Balance	234				107				234	107	12
Republic Credit Solutions | Republic Processing Group
Allowance for loan losses rollforward
Beginning Balance				$ 13,049				$ 12,610	13,049	12,610	4,967
Provision for loan and lease losses									11,443	16,881	17,396
Charged-off									(12,566)	(17,692)	(10,659)
Recoveries									1,192	1,250	906
Ending Balance	$ 13,118				$ 13,049				$ 13,118	$ 13,049	$ 12,610