LOANS AND ALLOWANCE FOR CREDIT LOSSES - DELINQUENT LOANS (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Aging or recorded investments in loans
Carrying value of loans	$ 4,362,233	$ 4,496,562
30 - 59 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	$ 6,477	$ 5,842
Delinquent acquired bank loans to total acquired bank loans (as a percent)	0.15%	0.13%
60 - 89 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	$ 2,278	$ 1,410
Delinquent acquired bank loans to total acquired bank loans (as a percent)	0.05%	0.03%
90 + Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	$ 2,696	$ 6,213
Delinquent acquired bank loans to total acquired bank loans (as a percent)	0.06%	0.14%
Past Due
Aging or recorded investments in loans
Carrying value of loans	$ 11,451	$ 13,465
Delinquent acquired bank loans to total acquired bank loans (as a percent)	0.26%	0.30%
Current
Aging or recorded investments in loans
Carrying value of loans	$ 4,350,782	$ 4,483,097
Residential Real Estate | Residential Real Estate - Owner Occupied
Aging or recorded investments in loans
Carrying value of loans	832,137	820,731
Residential Real Estate | Residential Real Estate - Non Owner Occupied
Aging or recorded investments in loans
Carrying value of loans	313,534	306,323
Residential Real Estate | Home equity
Aging or recorded investments in loans
Carrying value of loans	214,069	210,578
Commercial Real Estate
Aging or recorded investments in loans
Carrying value of loans	1,569,119	1,456,009
Construction & land development
Aging or recorded investments in loans
Carrying value of loans	137,452	129,337
Commercial | Commercial and Industrial
Aging or recorded investments in loans
Carrying value of loans	394,175	340,363
Commercial | Paycheck Protection Program
Aging or recorded investments in loans
Carrying value of loans	14,657	56,014
Lease Financing Receivables
Aging or recorded investments in loans
Carrying value of loans	11,345	8,637
Aircraft
Aging or recorded investments in loans
Carrying value of loans	159,958	142,894
Consumer
Aging or recorded investments in loans
Carrying value of loans	27,144	31,073
Warehouse lines of credit
Aging or recorded investments in loans
Carrying value of loans	596,678	850,550
Tax Refund Solution
Aging or recorded investments in loans
Carrying value of loans	149	50,987
Republic Credit Solution
Aging or recorded investments in loans
Carrying value of loans	91,816	93,066
Core Banking Activities
Aging or recorded investments in loans
Carrying value of loans	4,270,268	4,352,509
Core Banking Activities | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	1,563	832
Core Banking Activities | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	1,135	432
Core Banking Activities | 90 + Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	2,654	6,166
Core Banking Activities | Past Due
Aging or recorded investments in loans
Carrying value of loans	5,352	7,430
Core Banking Activities | Current
Aging or recorded investments in loans
Carrying value of loans	4,264,916	4,345,079
Core Banking Activities | Warehouse lines of credit
Aging or recorded investments in loans
Carrying value of loans	596,678	850,550
Core Banking Activities | Warehouse lines of credit | Current
Aging or recorded investments in loans
Carrying value of loans		850,550
Traditional Banking
Aging or recorded investments in loans
Carrying value of loans	3,673,590	3,501,959
Traditional Banking | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	1,563	832
Traditional Banking | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	1,135	432
Traditional Banking | 90 + Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	2,654	6,166
Traditional Banking | Past Due
Aging or recorded investments in loans
Carrying value of loans	5,352	7,430
Traditional Banking | Current
Aging or recorded investments in loans
Carrying value of loans	3,668,238	3,494,529
Traditional Banking | Residential Real Estate | Residential Real Estate - Owner Occupied
Aging or recorded investments in loans
Carrying value of loans	832,137	820,731
Traditional Banking | Residential Real Estate | Residential Real Estate - Owner Occupied | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	1,340	606
Traditional Banking | Residential Real Estate | Residential Real Estate - Owner Occupied | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	796	383
Traditional Banking | Residential Real Estate | Residential Real Estate - Owner Occupied | 90 + Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	333	610
Traditional Banking | Residential Real Estate | Residential Real Estate - Owner Occupied | Past Due
Aging or recorded investments in loans
Carrying value of loans	2,469	1,599
Traditional Banking | Residential Real Estate | Residential Real Estate - Owner Occupied | Current
Aging or recorded investments in loans
Carrying value of loans	829,668	819,132
Traditional Banking | Residential Real Estate | Residential Real Estate - Non Owner Occupied
Aging or recorded investments in loans
Carrying value of loans	313,534	306,323
Traditional Banking | Residential Real Estate | Residential Real Estate - Non Owner Occupied | 90 + Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	41
Traditional Banking | Residential Real Estate | Residential Real Estate - Non Owner Occupied | Past Due
Aging or recorded investments in loans
Carrying value of loans	41
Traditional Banking | Residential Real Estate | Residential Real Estate - Non Owner Occupied | Current
Aging or recorded investments in loans
Carrying value of loans	313,493	306,323
Traditional Banking | Residential Real Estate | Home equity
Aging or recorded investments in loans
Carrying value of loans	214,069	210,578
Traditional Banking | Residential Real Estate | Home equity | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	8	38
Traditional Banking | Residential Real Estate | Home equity | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	10	35
Traditional Banking | Residential Real Estate | Home equity | 90 + Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	132	241
Traditional Banking | Residential Real Estate | Home equity | Past Due
Aging or recorded investments in loans
Carrying value of loans	150	314
Traditional Banking | Residential Real Estate | Home equity | Current
Aging or recorded investments in loans
Carrying value of loans	213,919	210,264
Traditional Banking | Commercial Real Estate
Aging or recorded investments in loans
Carrying value of loans	1,569,119	1,456,009
Traditional Banking | Commercial Real Estate | 90 + Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	2,142	5,292
Traditional Banking | Commercial Real Estate | Past Due
Aging or recorded investments in loans
Carrying value of loans	2,142	5,292
Traditional Banking | Commercial Real Estate | Current
Aging or recorded investments in loans
Carrying value of loans	1,566,977	1,450,717
Traditional Banking | Construction & land development
Aging or recorded investments in loans
Carrying value of loans	137,452	129,337
Traditional Banking | Construction & land development | Current
Aging or recorded investments in loans
Carrying value of loans	137,452	129,337
Traditional Banking | Commercial | Commercial and Industrial
Aging or recorded investments in loans
Carrying value of loans	394,175	340,363
Traditional Banking | Commercial | Commercial and Industrial | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans		8
Traditional Banking | Commercial | Commercial and Industrial | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	321
Traditional Banking | Commercial | Commercial and Industrial | 90 + Days Delinquent
Aging or recorded investments in loans
Carrying value of loans		13
Traditional Banking | Commercial | Commercial and Industrial | Past Due
Aging or recorded investments in loans
Carrying value of loans	321	21
Traditional Banking | Commercial | Commercial and Industrial | Current
Aging or recorded investments in loans
Carrying value of loans	393,854	340,342
Traditional Banking | Commercial | Paycheck Protection Program
Aging or recorded investments in loans
Carrying value of loans	14,657	56,014
Traditional Banking | Commercial | Paycheck Protection Program | Current
Aging or recorded investments in loans
Carrying value of loans	14,657	56,014
Traditional Banking | Lease Financing Receivables
Aging or recorded investments in loans
Carrying value of loans	11,345	8,637
Traditional Banking | Lease Financing Receivables | Current
Aging or recorded investments in loans
Carrying value of loans	11,345	8,637
Traditional Banking | Aircraft
Aging or recorded investments in loans
Carrying value of loans	159,958	142,894
Traditional Banking | Aircraft | Current
Aging or recorded investments in loans
Carrying value of loans	159,958	142,894
Traditional Banking | Consumer | Credit cards
Aging or recorded investments in loans
Carrying value of loans	15,419	14,510
Traditional Banking | Consumer | Credit cards | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	19	19
Traditional Banking | Consumer | Credit cards | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	5	11
Traditional Banking | Consumer | Credit cards | Past Due
Aging or recorded investments in loans
Carrying value of loans	24	30
Traditional Banking | Consumer | Credit cards | Current
Aging or recorded investments in loans
Carrying value of loans	15,395	14,480
Traditional Banking | Consumer | Overdrafts
Aging or recorded investments in loans
Carrying value of loans	901	683
Traditional Banking | Consumer | Overdrafts | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	196	160
Traditional Banking | Consumer | Overdrafts | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	3	3
Traditional Banking | Consumer | Overdrafts | 90 + Days Delinquent
Aging or recorded investments in loans
Carrying value of loans		1
Traditional Banking | Consumer | Overdrafts | Past Due
Aging or recorded investments in loans
Carrying value of loans	199	164
Traditional Banking | Consumer | Overdrafts | Current
Aging or recorded investments in loans
Carrying value of loans	702	519
Traditional Banking | Consumer | Automobile loans
Aging or recorded investments in loans
Carrying value of loans	9,579	14,448
Traditional Banking | Consumer | Automobile loans | 90 + Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	6	9
Traditional Banking | Consumer | Automobile loans | Past Due
Aging or recorded investments in loans
Carrying value of loans	6	9
Traditional Banking | Consumer | Automobile loans | Current
Aging or recorded investments in loans
Carrying value of loans	9,573	14,439
Traditional Banking | Consumer | Other consumer
Aging or recorded investments in loans
Carrying value of loans	1,245	1,432
Traditional Banking | Consumer | Other consumer | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans		1
Traditional Banking | Consumer | Other consumer | Past Due
Aging or recorded investments in loans
Carrying value of loans		1
Traditional Banking | Consumer | Other consumer | Current
Aging or recorded investments in loans
Carrying value of loans	1,245	1,431
Warehouse Lending | Warehouse lines of credit
Aging or recorded investments in loans
Carrying value of loans	596,678
Warehouse Lending | Warehouse lines of credit | Current
Aging or recorded investments in loans
Carrying value of loans	596,678
Republic Processing Group
Aging or recorded investments in loans
Carrying value of loans	91,965	144,053
Republic Processing Group | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	4,914	5,010
Republic Processing Group | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	1,143	978
Republic Processing Group | 90 + Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	42	47
Republic Processing Group | Past Due
Aging or recorded investments in loans
Carrying value of loans	6,099	6,035
Republic Processing Group | Current
Aging or recorded investments in loans
Carrying value of loans	85,866	138,018
Republic Processing Group | Tax Refund Solution | Other TRS loans
Aging or recorded investments in loans
Carrying value of loans	149	50,987
Republic Processing Group | Tax Refund Solution | Other TRS loans | Current
Aging or recorded investments in loans
Carrying value of loans	149	50,987
Republic Processing Group | Republic Credit Solution
Aging or recorded investments in loans
Carrying value of loans	91,816	93,066
Republic Processing Group | Republic Credit Solution | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	4,914	5,010
Republic Processing Group | Republic Credit Solution | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	1,143	978
Republic Processing Group | Republic Credit Solution | 90 + Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	42	47
Republic Processing Group | Republic Credit Solution | Past Due
Aging or recorded investments in loans
Carrying value of loans	6,099	6,035
Republic Processing Group | Republic Credit Solution | Current
Aging or recorded investments in loans
Carrying value of loans	$ 85,717	$ 87,031