LOANS AND ALLOWANCE FOR CREDIT LOSSES - ALLOWANCE ACTIVITY (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Allowance for loan losses rollforward
Beginning Balance			$ 70,431	$ 57,961	$ 43,351	$ 44,675
Provision			6,558	4,460	29,072	21,691
Charged-off			(22,311)	(17,163)	(25,586)	(21,616)
Recoveries			419	725	1,526	1,233
Ending Balance	$ 55,097	$ 70,431	55,097	45,983	$ 55,097	45,983
U.S. unemployment rate	11.10%	4.40%
Forecast period of management's expectation for loss rates to revert back to long-term historical averages					1 year
Minimum
Allowance for loan losses rollforward
Forecasted unemployment rate					8.00%
Core Banking
Allowance for loan losses rollforward
Beginning Balance			42,680	31,569	$ 29,999	31,519
Provision			3,553	1,844	9,228	2,258
Charged-off			(700)	(791)	(1,222)	(1,403)
Recoveries			219	361	1,013	609
Ending Balance	$ 45,752	$ 42,680	45,752	32,983	45,752	32,983
Traditional Banking
Allowance for loan losses rollforward
Beginning Balance			40,554	30,172	28,205	30,347
Provision			3,104	1,427	8,447	1,616
Charged-off			(700)	(791)	(1,222)	(1,403)
Recoveries			219	361	1,013	609
Ending Balance	43,177	40,554	43,177	31,169	43,177	31,169
Republic Processing Group
Allowance for loan losses rollforward
Beginning Balance			27,751	26,392	13,352	13,156
Provision			3,005	2,616	19,844	19,433
Charged-off			(21,611)	(16,372)	(24,364)	(20,213)
Recoveries			200	364	513	624
Ending Balance	9,345	27,751	9,345	13,000	9,345	13,000
Residential Real Estate - Owner Occupied | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance			9,387	5,801	4,729	6,035
Provision			(127)	(442)	320	(697)
Charged-off				(367)	(27)	(384)
Recoveries			43	221	82	259
Ending Balance	9,303	9,387	9,303	5,213	9,303	5,213
Residential Real Estate - Non Owner Occupied | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance			2,165	1,720	1,737	1,662
Provision			107	48	385	178
Charged-off				(1)		(73)
Recoveries			2	8	4	8
Ending Balance	2,274	2,165	2,274	1,775	2,274	1,775
Commercial Real Estate | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance			13,381	10,235	10,486	10,030
Provision			3,187	329	5,338	532
Charged-off			(270)		(270)
Recoveries			2	2	473	4
Ending Balance	16,300	13,381	16,300	10,566	16,300	10,566
Construction & land development | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance			4,536	2,443	2,152	2,555
Provision			404	467	1,341	355
Ending Balance	4,940	4,536	4,940	2,910	4,940	2,910
Commercial & industrial | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance			2,541	3,235	2,882	2,873
Provision			15	983	989	1,343
Charged-off			(192)		(192)
Recoveries			41	3	44	5
Ending Balance	2,405	2,541	2,405	4,221	2,405	4,221
Lease Financing Receivables | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance			133	150	147	158
Provision			(8)	31	(22)	23
Ending Balance	125	133	125	181	125	181
Home equity lines of credit | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance			5,290	3,337	2,721	3,477
Provision			(178)	(221)	664	(378)
Charged-off						(13)
Recoveries			12	8	87	38
Ending Balance	5,124	5,290	5,124	3,124	5,124	3,124
Consumer: Credit cards | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance			978	1,079	1,020	1,140
Provision			16	14	38	79
Charged-off			(71)	(76)	(177)	(226)
Recoveries			5	11	14	35
Ending Balance	928	978	928	1,028	928	1,028
Consumer: Overdrafts | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance			758	892	1,169	1,102
Provision			(189)	250	(311)	269
Charged-off			(159)	(299)	(503)	(593)
Recoveries			78	51	133	116
Ending Balance	488	758	488	894	488	894
Consumer: Automobile loan | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance			546	768	612	724
Provision			(74)	(61)	(153)	(23)
Charged-off					(8)
Recoveries			1	1	29	7
Ending Balance	473	546	473	708	473	708
Other consumer | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance			839	512	550	591
Provision			(49)	29	(142)	(65)
Charged-off			(8)	(48)	(45)	(114)
Recoveries			35	56	147	137
Ending Balance	817	839	817	549	817	549
Warehouse lines of credit | Core Banking
Allowance for loan losses rollforward
Beginning Balance			2,126	1,397	1,794	1,172
Provision			449	417	781	642
Ending Balance	2,575	2,126	2,575	1,814	2,575	1,814
Easy Advances | Republic Processing Group
Allowance for loan losses rollforward
Beginning Balance			15,270	13,381
Provision			4,305	39	19,533	13,420
Charged-off			(19,575)	(13,425)	(19,575)	(13,425)
Recoveries				5	42	5
Ending Balance		15,270
Other TRS loans | Republic Processing Group
Allowance for loan losses rollforward
Beginning Balance			95	149	234	107
Provision			143	353	48	406
Charged-off			(28)	(264)	(72)	(281)
Recoveries			1	(6)	1
Ending Balance	211	95	211	232	211	232
Republic Credit Solutions | Republic Processing Group
Allowance for loan losses rollforward
Beginning Balance			12,386	12,862	13,118	13,049
Provision			(1,443)	2,224	263	5,607
Charged-off			(2,008)	(2,683)	(4,717)	(6,507)
Recoveries			199	365	470	619
Ending Balance	$ 9,134	$ 12,386	$ 9,134	$ 12,768	9,134	$ 12,768
ASU 2016-13
Allowance for loan losses rollforward
Beginning Balance					50,085
ASU 2016-13 | Adjustment
Allowance for loan losses rollforward
Beginning Balance					6,734
ASU 2016-13 | Core Banking
Allowance for loan losses rollforward
Beginning Balance					36,733
ASU 2016-13 | Core Banking | Adjustment
Allowance for loan losses rollforward
Beginning Balance					6,734
ASU 2016-13 | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance					34,939
ASU 2016-13 | Traditional Banking | Adjustment
Allowance for loan losses rollforward
Beginning Balance					6,734
ASU 2016-13 | Republic Processing Group
Allowance for loan losses rollforward
Beginning Balance					13,352
ASU 2016-13 | Residential Real Estate - Owner Occupied | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance					8,928
ASU 2016-13 | Residential Real Estate - Owner Occupied | Traditional Banking | Adjustment
Allowance for loan losses rollforward
Beginning Balance					4,199
ASU 2016-13 | Residential Real Estate - Non Owner Occupied | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance					1,885
ASU 2016-13 | Residential Real Estate - Non Owner Occupied | Traditional Banking | Adjustment
Allowance for loan losses rollforward
Beginning Balance					148
ASU 2016-13 | Commercial Real Estate | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance					10,759
ASU 2016-13 | Commercial Real Estate | Traditional Banking | Adjustment
Allowance for loan losses rollforward
Beginning Balance					273
ASU 2016-13 | Construction & land development | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance					3,599
ASU 2016-13 | Construction & land development | Traditional Banking | Adjustment
Allowance for loan losses rollforward
Beginning Balance					1,447
ASU 2016-13 | Commercial & industrial | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance					1,564
ASU 2016-13 | Commercial & industrial | Traditional Banking | Adjustment
Allowance for loan losses rollforward
Beginning Balance					(1,318)
ASU 2016-13 | Lease Financing Receivables | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance					147
ASU 2016-13 | Home equity lines of credit | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance					4,373
ASU 2016-13 | Home equity lines of credit | Traditional Banking | Adjustment
Allowance for loan losses rollforward
Beginning Balance					1,652
ASU 2016-13 | Consumer: Credit cards | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance					1,053
ASU 2016-13 | Consumer: Credit cards | Traditional Banking | Adjustment
Allowance for loan losses rollforward
Beginning Balance					33
ASU 2016-13 | Consumer: Overdrafts | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance					1,169
ASU 2016-13 | Consumer: Automobile loan | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance					605
ASU 2016-13 | Consumer: Automobile loan | Traditional Banking | Adjustment
Allowance for loan losses rollforward
Beginning Balance					(7)
ASU 2016-13 | Other consumer | Traditional Banking
Allowance for loan losses rollforward
Beginning Balance					857
ASU 2016-13 | Other consumer | Traditional Banking | Adjustment
Allowance for loan losses rollforward
Beginning Balance					307
ASU 2016-13 | Warehouse lines of credit | Core Banking
Allowance for loan losses rollforward
Beginning Balance					1,794
ASU 2016-13 | Other TRS loans | Republic Processing Group
Allowance for loan losses rollforward
Beginning Balance					234
ASU 2016-13 | Republic Credit Solutions | Republic Processing Group
Allowance for loan losses rollforward
Beginning Balance					$ 13,118