LOANS AND ALLOWANCE FOR CREDIT LOSSES - DELINQUENT LOANS (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Aging or recorded investments in loans
Lease financing receivables	$ 11,333	$ 8,637
Loans	4,289,450	4,496,562
30 - 59 Days Delinquent
Aging or recorded investments in loans
Loans	$ 7,384	$ 5,842
Delinquent acquired bank loans to total acquired bank loans (as a percent)	0.17%	0.13%
60 - 89 Days Delinquent
Aging or recorded investments in loans
Loans	$ 3,232	$ 1,410
Delinquent acquired bank loans to total acquired bank loans (as a percent)	0.08%	0.03%
90 + Days Delinquent
Aging or recorded investments in loans
Loans	$ 1,274	$ 6,213
Delinquent acquired bank loans to total acquired bank loans (as a percent)	0.03%	0.14%
Past Due
Aging or recorded investments in loans
Loans	$ 11,890	$ 13,465
Delinquent acquired bank loans to total acquired bank loans (as a percent)	0.28%	0.30%
Current
Aging or recorded investments in loans
Loans	$ 4,277,560	$ 4,483,097
Residential Real Estate | Residential Real Estate - Owner Occupied
Aging or recorded investments in loans
Carrying value of loans	863,899	820,731
Residential Real Estate | Residential Real Estate - Non Owner Occupied
Aging or recorded investments in loans
Carrying value of loans	321,037	306,323
Residential Real Estate | Home equity
Aging or recorded investments in loans
Carrying value of loans	229,038	210,578
Commercial Real Estate
Aging or recorded investments in loans
Carrying value of loans	1,571,593	1,456,009
Construction & land development
Aging or recorded investments in loans
Carrying value of loans	147,418	129,337
Commercial | Commercial and Industrial
Aging or recorded investments in loans
Carrying value of loans	404,971	340,363
Commercial | Paycheck Protection Program
Aging or recorded investments in loans
Carrying value of loans	7,855	56,014
Aircraft
Aging or recorded investments in loans
Carrying value of loans	166,313	142,894
Consumer
Aging or recorded investments in loans
Carrying value of loans	24,483	31,073
Warehouse lines of credit
Aging or recorded investments in loans
Carrying value of loans	442,238	850,550
Tax Refund Solution
Aging or recorded investments in loans
Carrying value of loans	295	50,987
Republic Credit Solution
Aging or recorded investments in loans
Carrying value of loans	98,977	93,066
Core Banking Activities
Aging or recorded investments in loans
Loans	4,190,178	4,352,509
Core Banking Activities | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Loans	1,575	832
Core Banking Activities | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Loans	1,556	432
Core Banking Activities | 90 + Days Delinquent
Aging or recorded investments in loans
Loans	1,237	6,166
Core Banking Activities | Past Due
Aging or recorded investments in loans
Loans	4,368	7,430
Core Banking Activities | Current
Aging or recorded investments in loans
Loans	4,185,810	4,345,079
Core Banking Activities | Warehouse lines of credit
Aging or recorded investments in loans
Carrying value of loans	442,238	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
Lease financing receivables	11,333	8,637
Loans	3,747,940	3,501,959
Traditional Banking | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	1,575	832
Traditional Banking | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	1,556	432
Traditional Banking | 90 + Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	1,237	6,166
Traditional Banking | Past Due
Aging or recorded investments in loans
Carrying value of loans	4,368	7,430
Traditional Banking | Current
Aging or recorded investments in loans
Lease financing receivables	11,333	8,637
Loans	3,743,572	3,494,529
Traditional Banking | Residential Real Estate | Residential Real Estate - Owner Occupied
Aging or recorded investments in loans
Carrying value of loans	863,899	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	1,373	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	1,512	383
Traditional Banking | Residential Real Estate | Residential Real Estate - Owner Occupied | 90 + Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	876	610
Traditional Banking | Residential Real Estate | Residential Real Estate - Owner Occupied | Past Due
Aging or recorded investments in loans
Carrying value of loans	3,761	1,599
Traditional Banking | Residential Real Estate | Residential Real Estate - Owner Occupied | Current
Aging or recorded investments in loans
Carrying value of loans	860,138	819,132
Traditional Banking | Residential Real Estate | Residential Real Estate - Non Owner Occupied
Aging or recorded investments in loans
Carrying value of loans	321,037	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	320,996	306,323
Traditional Banking | Residential Real Estate | Home equity
Aging or recorded investments in loans
Carrying value of loans	229,038	210,578
Traditional Banking | Residential Real Estate | Home equity | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans		38
Traditional Banking | Residential Real Estate | Home equity | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans		35
Traditional Banking | Residential Real Estate | Home equity | 90 + Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	315	241
Traditional Banking | Residential Real Estate | Home equity | Past Due
Aging or recorded investments in loans
Carrying value of loans	315	314
Traditional Banking | Residential Real Estate | Home equity | Current
Aging or recorded investments in loans
Carrying value of loans	228,723	210,264
Traditional Banking | Commercial Real Estate
Aging or recorded investments in loans
Carrying value of loans	1,571,593	1,456,009
Traditional Banking | Commercial Real Estate | 90 + Days Delinquent
Aging or recorded investments in loans
Carrying value of loans		5,292
Traditional Banking | Commercial Real Estate | Past Due
Aging or recorded investments in loans
Carrying value of loans		5,292
Traditional Banking | Commercial Real Estate | Current
Aging or recorded investments in loans
Carrying value of loans	1,571,593	1,450,717
Traditional Banking | Construction & land development
Aging or recorded investments in loans
Carrying value of loans	147,418	129,337
Traditional Banking | Construction & land development | Current
Aging or recorded investments in loans
Carrying value of loans	147,418	129,337
Traditional Banking | Commercial | Commercial and Industrial
Aging or recorded investments in loans
Carrying value of loans	404,971	340,363
Traditional Banking | Commercial | Commercial and Industrial | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	1	8
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	1	21
Traditional Banking | Commercial | Commercial and Industrial | Current
Aging or recorded investments in loans
Carrying value of loans	404,970	340,342
Traditional Banking | Commercial | Paycheck Protection Program
Aging or recorded investments in loans
Carrying value of loans	7,855	56,014
Traditional Banking | Commercial | Paycheck Protection Program | Current
Aging or recorded investments in loans
Carrying value of loans	7,855	56,014
Traditional Banking | Aircraft
Aging or recorded investments in loans
Carrying value of loans	166,313	142,894
Traditional Banking | Aircraft | Current
Aging or recorded investments in loans
Carrying value of loans	166,313	142,894
Traditional Banking | Consumer | Credit cards
Aging or recorded investments in loans
Carrying value of loans	14,897	14,510
Traditional Banking | Consumer | Credit cards | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	23	19
Traditional Banking | Consumer | Credit cards | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	10	11
Traditional Banking | Consumer | Credit cards | Past Due
Aging or recorded investments in loans
Carrying value of loans	33	30
Traditional Banking | Consumer | Credit cards | Current
Aging or recorded investments in loans
Carrying value of loans	14,864	14,480
Traditional Banking | Consumer | Overdrafts
Aging or recorded investments in loans
Carrying value of loans	723	683
Traditional Banking | Consumer | Overdrafts | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	155	160
Traditional Banking | Consumer | Overdrafts | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	2	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	157	164
Traditional Banking | Consumer | Overdrafts | Current
Aging or recorded investments in loans
Carrying value of loans	566	519
Traditional Banking | Consumer | Automobile loans
Aging or recorded investments in loans
Carrying value of loans	7,890	14,448
Traditional Banking | Consumer | Automobile loans | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	18
Traditional Banking | Consumer | Automobile loans | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	31
Traditional Banking | Consumer | Automobile loans | 90 + Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	4	9
Traditional Banking | Consumer | Automobile loans | Past Due
Aging or recorded investments in loans
Carrying value of loans	53	9
Traditional Banking | Consumer | Automobile loans | Current
Aging or recorded investments in loans
Carrying value of loans	7,837	14,439
Traditional Banking | Consumer | Other consumer
Aging or recorded investments in loans
Carrying value of loans	973	1,432
Traditional Banking | Consumer | Other consumer | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	5	1
Traditional Banking | Consumer | Other consumer | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	1
Traditional Banking | Consumer | Other consumer | 90 + 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	7	1
Traditional Banking | Consumer | Other consumer | Current
Aging or recorded investments in loans
Carrying value of loans	966	1,431
Warehouse Lending | Warehouse lines of credit
Aging or recorded investments in loans
Carrying value of loans	442,238
Warehouse Lending | Warehouse lines of credit | Current
Aging or recorded investments in loans
Carrying value of loans	442,238
Republic Processing Group
Aging or recorded investments in loans
Carrying value of loans	99,272	144,053
Republic Processing Group | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	5,809	5,010
Republic Processing Group | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	1,676	978
Republic Processing Group | 90 + Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	37	47
Republic Processing Group | Past Due
Aging or recorded investments in loans
Carrying value of loans	7,522	6,035
Republic Processing Group | Current
Aging or recorded investments in loans
Carrying value of loans	91,750	138,018
Republic Processing Group | Tax Refund Solution | Other TRS loans
Aging or recorded investments in loans
Carrying value of loans	295	50,987
Republic Processing Group | Tax Refund Solution | Other TRS loans | Current
Aging or recorded investments in loans
Carrying value of loans	295	50,987
Republic Processing Group | Republic Credit Solution
Aging or recorded investments in loans
Carrying value of loans	98,977	93,066
Republic Processing Group | Republic Credit Solution | 30 - 59 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	5,809	5,010
Republic Processing Group | Republic Credit Solution | 60 - 89 Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	1,676	978
Republic Processing Group | Republic Credit Solution | 90 + Days Delinquent
Aging or recorded investments in loans
Carrying value of loans	37	47
Republic Processing Group | Republic Credit Solution | Past Due
Aging or recorded investments in loans
Carrying value of loans	7,522	6,035
Republic Processing Group | Republic Credit Solution | Current
Aging or recorded investments in loans
Carrying value of loans	$ 91,455	$ 87,031