LOANS AND ALLOWANCE FOR CREDIT LOSSES - RISK CATEGORY (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Loans
Revolving Loans Amortized Cost Basis			$ 864,686
Revolving Loans Converted To Term Loans			161,226
Loans, Gross Charge-offs
Revolving Loans Amortized Cost Basis			15,061
Lease
Year One	$ 7,362		46,253
Year Two	43,362		24,088
Year Three	22,079		10,427
Year Four	9,169		4,754
Year Five	4,135		2,371
Prior	2,165		698
Total Loans	88,272		88,591
Lease, Gross Charge-offs
Year One			20
Year Two	24		113
Prior			8
Total	24		141
Loans and Lease
Year One	151,635		1,353,074
Year Two	894,783		981,145
Year Three	902,506		758,188
Year Four	688,521		439,564
Year Five	638,276		206,951
Prior	782,158		475,027
Total loans	5,224,292		5,239,861
Loans and Lease, Gross Charge-offs
Year One			20,447
Year Two	24		5,667
Year Three			24
Year Four	13
Prior			15
Total, YTD Gross Charge-offs	4,927	$ 3,430	41,214
Loans held for investment fair value	0		0
Pass or not rated
Loans
Revolving Loans Amortized Cost Basis			858,643
Revolving Loans Converted To Term Loans			160,406
Lease
Year One	7,362		45,824
Year Two	42,950		23,956
Year Three	21,864		10,265
Year Four	9,023		4,571
Year Five	3,979		2,344
Prior	2,117		545
Total Loans	87,295		87,505
Loans and Lease
Year One	151,635		1,328,184
Year Two	893,824		975,037
Year Three	891,265		752,275
Year Four	680,460		438,155
Year Five	628,848		201,876
Prior	739,480		451,439
Total loans			5,166,015
Special Mention
Loans
Revolving Loans Amortized Cost Basis			2,493
Lease
Year One			429
Year Two	412		30
Year Three	28		162
Year Four	108		183
Year Five	156		27
Prior	17		88
Total Loans	721		919
Loans and Lease
Year One			24,841
Year Two	719		3,444
Year Three	7,353		4,009
Year Four	6,258		183
Year Five	7,312		3,695
Prior	31,783		13,229
Total loans			51,894
Substandard
Loans
Revolving Loans Amortized Cost Basis			3,550
Revolving Loans Converted To Term Loans			820
Lease
Year Two			102
Year Three	187
Year Four	38
Prior	31		65
Total Loans	256		167
Loans and Lease
Year One			49
Year Two	240		2,664
Year Three	3,888		1,904
Year Four	1,803		1,226
Year Five	2,116		1,380
Prior	10,895		10,359
Total loans			21,952
Traditional Banking
Lease
Total Loans	88,272		88,591
Lease, Gross Charge-offs
Total	24
Loans and Lease
Total loans	4,573,650		4,618,569
Loans and Lease, Gross Charge-offs
Total, YTD Gross Charge-offs	382	331
Residential real estate \| Residential Real Estate - Owner Occupied
Loans
Year One	20,990		346,236
Year Two	257,838		203,241
Year Three	203,035		176,915
Year Four	173,719		168,719
Year Five	166,155		61,022
Prior	239,900		186,077
Revolving Loans Converted To Term Loans	2,434		2,474
Loans	1,064,071		1,144,684
Loans, Gross Charge-offs
Year Two			10
Year Three			16
Year Four	13
Total	13		26
Residential real estate \| Residential Real Estate - Owner Occupied \| Pass or not rated
Loans
Year One	20,990		346,195
Year Two	257,598		200,715
Year Three	199,426		175,030
Year Four	171,956		167,493
Year Five	164,679		59,982
Prior	223,861		170,402
Revolving Loans Converted To Term Loans	2,434		2,474
Loans	1,040,944		1,122,291
Residential real estate \| Residential Real Estate - Owner Occupied \| Special Mention
Loans
Year One			41
Prior	5,757		6,309
Loans	5,757		6,350
Residential real estate \| Residential Real Estate - Owner Occupied \| Substandard
Loans
Year Two	240		2,526
Year Three	3,609		1,885
Year Four	1,763		1,226
Year Five	1,476		1,040
Prior	10,282		9,366
Loans	17,370		16,043
Residential real estate \| Residential Real Estate - Owner Occupied \| Traditional Banking
Loans
Loans	1,064,071		1,144,684
Loans, Gross Charge-offs
Total	13	6
Residential real estate \| Residential Real Estate - Non Owner Occupied
Loans
Year One	2,567		63,575
Year Two	57,662		71,798
Year Three	65,110		82,830
Year Four	74,295		47,395
Year Five	65,051		28,416
Prior	70,160		44,354
Revolving Loans Converted To Term Loans	7,636		7,597
Loans	342,481		345,965
Residential real estate \| Residential Real Estate - Non Owner Occupied \| Pass or not rated
Loans
Year One	2,567		63,405
Year Two	57,493		69,827
Year Three	63,182		82,814
Year Four	74,295		47,395
Year Five	65,051		28,416
Prior	70,075		44,280
Revolving Loans Converted To Term Loans	7,636		7,597
Loans	340,299		343,734
Residential real estate \| Residential Real Estate - Non Owner Occupied \| Special Mention
Loans
Year One			170
Year Two	169		1,971
Year Three	1,928
Prior	25		26
Loans	2,122		2,167
Residential real estate \| Residential Real Estate - Non Owner Occupied \| Substandard
Loans
Year Three			16
Prior	60		48
Loans	60		64
Residential real estate \| Residential Real Estate - Non Owner Occupied \| Traditional Banking
Loans
Loans	342,481		345,965
Residential real estate \| Home equity
Loans
Revolving Loans Amortized Cost Basis	309,083		295,133
Loans	309,083		295,133
Loans, Gross Charge-offs
Revolving Loans Amortized Cost Basis			2
Total			2
Residential real estate \| Home equity \| Pass or not rated
Loans
Revolving Loans Amortized Cost Basis	306,523		292,890
Loans	306,523		292,890
Residential real estate \| Home equity \| Special Mention
Loans
Revolving Loans Amortized Cost Basis	250		235
Loans	250		235
Residential real estate \| Home equity \| Substandard
Loans
Revolving Loans Amortized Cost Basis	2,310		2,008
Loans	2,310		2,008
Residential real estate \| Home equity \| Traditional Banking
Loans
Loans	309,083		295,133
Commercial real estate
Loans
Year One	38,884		366,510
Year Two	217,232		440,663
Year Three	350,573		351,974
Year Four	300,051		174,093
Year Five	336,504		88,125
Prior	371,247		186,047
Revolving Loans Amortized Cost Basis	37,626		34,207
Revolving Loans Converted To Term Loans	148,684		143,670
Loans	1,800,801		1,785,289
Commercial real estate \| Pass or not rated
Loans
Year One	38,884		342,658
Year Two	217,232		439,643
Year Three	350,566		351,600
Year Four	295,191		174,093
Year Five	330,055		84,457
Prior	347,829		179,849
Revolving Loans Amortized Cost Basis	35,856		32,491
Revolving Loans Converted To Term Loans	148,684		143,670
Loans	1,764,297		1,748,461
Commercial real estate \| Special Mention
Loans
Year One			23,852
Year Two			1,020
Year Three			374
Year Four	4,860
Year Five	5,809		3,668
Prior	23,247		5,330
Revolving Loans Amortized Cost Basis	1,770		1,716
Loans	35,686		35,960
Commercial real estate \| Substandard
Loans
Year Three	7
Year Five	640
Prior	171		868
Loans	818		868
Commercial real estate \| Traditional Banking
Loans
Loans	1,800,801		1,785,289
Construction & land development
Loans
Year One	5,061		107,827
Year Two	79,899		89,106
Year Three	117,704		16,936
Year Four	22,655		297
Year Five	2,689		125
Prior	5,217		125
Revolving Loans Amortized Cost Basis	385		225
Revolving Loans Converted To Term Loans	4,388		2,697
Loans	237,998		217,338
Construction & land development \| Pass or not rated
Loans
Year One	5,061		107,827
Year Two	79,899		89,106
Year Three	117,704		16,936
Year Four	22,655		297
Year Five	2,689		125
Prior	5,217		125
Revolving Loans Amortized Cost Basis	385		225
Revolving Loans Converted To Term Loans	4,388		2,697
Loans	237,998		217,338
Construction & land development \| Traditional Banking
Loans
Loans	237,998		217,338
Commercial \| Commercial and Industrial
Loans
Year One	15,456		141,151
Year Two	100,796		87,956
Year Three	82,264		73,625
Year Four	65,823		13,150
Year Five	35,060		10,514
Prior	35,119		12,258
Revolving Loans Amortized Cost Basis	115,317		120,636
Revolving Loans Converted To Term Loans	4,136		4,788
Loans	453,971		464,078
Commercial \| Commercial and Industrial \| Pass or not rated
Loans
Year One	15,456		140,753
Year Two	100,658		87,497
Year Three	76,782		70,149
Year Four	64,531		13,150
Year Five	33,713		10,175
Prior	32,042		10,782
Revolving Loans Amortized Cost Basis	115,105		120,069
Revolving Loans Converted To Term Loans	3,793		3,968
Loans	442,080		456,543
Commercial \| Commercial and Industrial \| Special Mention
Loans
Year One			349
Year Two	138		423
Year Three	5,397		3,473
Year Four	1,290
Year Five	1,347
Prior	2,737		1,476
Revolving Loans Amortized Cost Basis	187		542
Loans	11,096		6,263
Commercial \| Commercial and Industrial \| Substandard
Loans
Year One			49
Year Two			36
Year Three	85		3
Year Four	2
Year Five			339
Prior	340
Revolving Loans Amortized Cost Basis	25		25
Revolving Loans Converted To Term Loans	343		820
Loans	795		1,272
Commercial \| Commercial and Industrial \| Traditional Banking
Loans
Loans	453,971		464,078
Aircraft
Loans
Year One	8,049		97,761
Year Two	93,208		55,896
Year Three	55,071		44,721
Year Four	42,213		30,628
Year Five	27,419		14,195
Prior	20,100		6,850
Loans	246,060		250,051
Aircraft \| Pass or not rated
Loans
Year One	8,049		97,761
Year Two	93,208		55,896
Year Three	55,071		44,721
Year Four	42,213		30,628
Year Five	27,419		14,195
Prior	20,100		6,850
Loans	246,060		250,051
Aircraft \| Traditional Banking
Loans
Loans	246,060		250,051
Consumer
Loans
Year One	3,331		3,947
Year Two	4,554		1,194
Year Three	1,124		181
Year Four	144		74
Year Five	54		1,187
Prior	2,899		2,246
Revolving Loans Amortized Cost Basis			18,611
Loans			27,440
Loans, Gross Charge-offs
Year One			9
Year Two			11
Year Three			8
Prior			7
Revolving Loans Amortized Cost Basis			1,147
Total			1,182
Consumer \| Pass or not rated
Loans
Year One	3,331		3,947
Year Two	4,554		1,194
Year Three	1,124		181
Year Four	144		74
Year Five	54		1,186
Prior	2,888		2,234
Revolving Loans Amortized Cost Basis			18,611
Loans			27,427
Consumer \| Substandard
Loans
Year Five			1
Prior	11		12
Loans			13
Consumer \| Credit cards \| Traditional Banking
Loans
Loans	16,858		16,654
Loans, Gross Charge-offs
Total	81	40
Consumer \| Overdrafts \| Traditional Banking
Loans
Loans	629		694
Loans, Gross Charge-offs
Total	238	247
Consumer \| Automobile loans \| Traditional Banking
Loans
Loans	2,054		2,664
Loans, Gross Charge-offs
Total		7
Consumer \| Other consumer \| Traditional Banking
Loans
Loans	11,372		7,428
Loans, Gross Charge-offs
Total	26	$ 31
Warehouse lines of credit
Loans
Revolving Loans Amortized Cost Basis			339,723
Loans			339,723
Warehouse lines of credit \| Pass or not rated
Loans
Revolving Loans Amortized Cost Basis			339,723
Loans			339,723
Tax Refund Solution
Loans
Year One	41,099		149,207
Year Two	16,398
Loans			149,207
Loans, Gross Charge-offs
Year One			20,418
Year Two			5,533
Total			25,951
Tax Refund Solution \| Pass or not rated
Loans
Year One	41,099		149,207
Year Two	16,398
Loans			149,207
Republic Credit Solution
Loans
Year One	8,836		30,607
Year Two	23,834		7,203
Year Three	5,546		579
Year Four	452		454
Year Five	1,209		996
Prior	35,351		36,372
Revolving Loans Amortized Cost Basis			56,151
Loans			132,362
Loans, Gross Charge-offs
Revolving Loans Amortized Cost Basis			13,912
Total			13,912
Republic Credit Solution \| Pass or not rated
Loans
Year One	8,836		30,607
Year Two	23,834		7,203
Year Three	5,546		579
Year Four	452		454
Year Five	1,209		996
Prior	$ 35,351		36,372
Revolving Loans Amortized Cost Basis			54,634
Loans			130,845
Republic Credit Solution \| Substandard
Loans
Revolving Loans Amortized Cost Basis			1,517
Loans			$ 1,517

The fair value of consumer loans held for investment.

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Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable and net investment in lease from writeoff.

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Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable and net investment in lease.

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Amortized cost excluding accrued interest, of financing receivable and net investment in lease originated more than five years prior to current fiscal year.

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Amortized cost excluding accrued interest, of financing receivable and net investment in lease originated in five years prior to current fiscal year.

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Amortized cost excluding accrued interest, of financing receivable and net investment in lease originated in four years prior to current fiscal year.

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Amount, excluding accrued interest, of writeoff of financing receivable and net investment in sales-type and direct financing leases originated more than five years before current fiscal year.

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Amount, excluding accrued interest, of writeoff of financing receivable and net investment in sales-type and direct financing leases originated in three years before current fiscal year.

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Amortized cost excluding accrued interest, of financing receivable and net investment in lease originated in current fiscal year.

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Amount, excluding accrued interest, of writeoff of financing receivable and net investment in sales-type and direct financing leases originated in current fiscal year.

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Amount, excluding accrued interest, of writeoff of financing receivable and net investment in sales-type and direct financing leases originated in two years before current fiscal year.

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Amortized cost excluding accrued interest, of financing receivable and net investment in lease originated two years prior to current fiscal year.

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Amount, excluding accrued interest, of writeoff of financing receivable and net investment in sales-type and direct financing leases originated in fiscal year before current fiscal year.

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Amortized cost excluding accrued interest, of financing receivable and net investment in lease originated in fiscal year prior to current fiscal year.

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Amount, excluding accrued interest, of decrease in allowance for credit loss on net investment in lease from write-off.

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Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479344/326-20-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-3B

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-5

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- Definition

Amortized cost excluding accrued interest, of financing receivable originated more than five years prior to current fiscal year. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-6

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
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