LOANS AND ALLOWANCE FOR CREDIT LOSSES - ALLOWANCE ACTIVITY (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 82,130	$ 70,413	$ 70,413
Provision	30,622	26,766
Charge-offs	(24)		(141)
Charge-offs	(4,927)	(3,430)	(41,214)
Recoveries	877	772
Ending Balance	$ 108,702	96,121	82,130
Forecast period for unemployment and general CRE values	1 year
Adjustment
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Beginning Balance		1,600	1,600
Core Banking Activities
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 59,845	51,718	51,718
Provision	667	3,119
Charge-offs	(382)	(331)
Recoveries	202	254
Ending Balance	60,332	56,360	59,845
Core Banking Activities \| Adjustment
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Beginning Balance		1,600	1,600
Traditional Banking
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Beginning balance	1,061	110	110
Beginning Balance	58,998	50,709	50,709
Provision	22	648
Provision	358	2,984
Charge-offs	(24)
Charge-offs	(382)	(331)
Recoveries	13
Recoveries	202	254
Ending balance	1,072	1,350	1,061
Ending Balance	59,176	55,216	58,998
Traditional Banking \| Adjustment
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Beginning balance		592	592
Beginning Balance		1,600	1,600
Republic Processing Group
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Beginning balance	22,285	18,695	18,695
Provision	29,955	23,647
Charge-offs	(4,545)	(3,099)
Recoveries	675	518
Ending balance	48,370	39,761	22,285
Residential real estate \| Residential Real Estate - Owner Occupied
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Charge-offs	(13)		(26)
Residential real estate \| Residential Real Estate - Owner Occupied \| Traditional Banking
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Beginning balance	10,337	8,909	8,909
Provision	(800)	(120)
Charge-offs	(13)	(6)
Recoveries	58	15
Ending balance	9,582	8,798	10,337
Residential real estate \| Residential Real Estate - Non Owner Occupied \| Traditional Banking
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Beginning balance	3,047	2,831	2,831
Provision	3	64
Recoveries	1
Ending balance	3,051	2,895	3,047
Residential real estate \| Home equity
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Charge-offs			(2)
Residential real estate \| Home equity \| Traditional Banking
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Beginning balance	5,501	4,628	4,628
Provision	247	31
Recoveries	1	1
Ending balance	5,749	4,660	5,501
Commercial real estate \| Traditional Banking
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Beginning balance	25,830	23,739	23,739
Provision	145	1,041
Recoveries	20	47
Ending balance	25,995	24,827	25,830
Construction & land development \| Traditional Banking
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Beginning balance	6,060	4,123	4,123
Provision	640	329
Ending balance	6,700	4,452	6,060
Commercial \| Commercial and Industrial \| Traditional Banking
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Beginning balance	4,236	3,976	3,976
Provision	(79)	602
Recoveries	1	90
Ending balance	4,158	5,676	4,236
Commercial \| Commercial and Industrial \| Traditional Banking \| Adjustment
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Beginning balance		1,008	1,008
Aircraft \| Traditional Banking
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Beginning balance	625	449	449
Provision	(10)	12
Ending balance	615	461	625
Consumer
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Charge-offs			(1,182)
Consumer \| Credit cards \| Traditional Banking
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Beginning balance	1,074	996	996
Provision	83	112
Charge-offs	(81)	(40)
Recoveries	11	12
Ending balance	1,087	1,080	1,074
Consumer \| Overdrafts \| Traditional Banking
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Beginning balance	694	726	726
Provision	27	52
Charge-offs	(238)	(247)
Recoveries	80	64
Ending balance	563	595	694
Consumer \| Automobile loans \| Traditional Banking
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Beginning balance	32	87	87
Provision	(10)	(16)
Charge-offs		(7)
Recoveries	2	2
Ending balance	24	66	32
Consumer \| Other consumer \| Traditional Banking
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Beginning balance	501	135	135
Provision	90	229
Charge-offs	(26)	(31)
Recoveries	15	23
Ending balance	580	356	501
Warehouse lines of credit \| Warehouse Lending
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Beginning balance	847	1,009	1,009
Provision	309	135
Ending balance	1,156	1,144	847
Tax Refund Solution
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Charge-offs			(25,951)
Tax Refund Solution \| Refund Advances \| Republic Processing Group
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Beginning balance	3,929	3,797	3,797
Provision	25,718	21,715
Recoveries	275	285
Ending balance	29,922	25,797	3,929
Tax Refund Solution \| Other TRS commercial and industrial loans \| Republic Processing Group
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Beginning balance	61	91	91
Provision	56	93
Recoveries	30
Ending balance	147	184	61
Republic Credit Solution
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Charge-offs			(13,912)
Republic Credit Solution \| Republic Processing Group
Financing Receivable And Net Investment In Lease, Excluding Interest Allowance for Credit Loss [Roll Forward]
Beginning balance	18,295	14,807	14,807
Provision	4,181	1,839
Charge-offs	(4,545)	(3,099)
Recoveries	370	233
Ending balance	$ 18,301	$ 13,780	$ 18,295

Amount of allowance for credit loss on financing receivable and net investment in lease.

No definition available.

Name:	rbcaa_FinancingReceivableAndNetInvestmentInLeaseAllowanceForCreditLossExcludingAccruedInterest
Namespace Prefix:	rbcaa_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

Name:	rbcaa_FinancingReceivableAndNetInvestmentInLeaseExcludingAccruedInterestAllowanceForCreditLossRecovery
Namespace Prefix:	rbcaa_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

Name:	rbcaa_FinancingReceivableAndNetInvestmentInLeaseExcludingAccruedInterestAllowanceForCreditLossWriteoff
Namespace Prefix:	rbcaa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount, excluding accrued interest, of credit loss expense (reversal of expense) on financing receivable and net investment in lease.

+ References

No definition available.

+ Details

Name:	rbcaa_FinancingReceivableAndNetInvestmentInLeaseExcludingAccruedInterestCreditLossExpenseReversal
Namespace Prefix:	rbcaa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

Name:	rbcaa_FinancingReceivableAndNetInvestmentInLeaseExcludingInterestAllowanceForCreditLossRollForward
Namespace Prefix:	rbcaa_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Forecast period of for unemployment and general CRE values.

+ References

No definition available.

+ Details

Name:	rbcaa_ForecastPeriodForUnemploymentAndCommercialRealEstateValues
Namespace Prefix:	rbcaa_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, excluding accrued interest, of increase in allowance for credit loss on net investment in lease from recovery.

+ References

No definition available.

+ Details

Name:	rbcaa_NetInvestmentInLeaseExcludingAccruedInterestAllowanceForCreditLossRecovery
Namespace Prefix:	rbcaa_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

Name:	rbcaa_NetInvestmentInLeaseExcludingAccruedInterestAllowanceForCreditLossWriteoff
Namespace Prefix:	rbcaa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount, excluding accrued interest, of credit loss expense (reversal of expense) on net investment in lease.

+ References

No definition available.

+ Details

Name:	rbcaa_NetInvestmentInLeaseExcludingAccruedInterestCreditLossExpenseReversal
Namespace Prefix:	rbcaa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount excluding accrued interest, of allowance for credit loss on 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

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, excluding accrued interest, of increase in allowance for credit loss on financing receivable from recovery. 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 13
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-13

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

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
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-13

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount, excluding accrued interest, of credit loss expense (reversal of expense) on financing receivable. 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 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-13

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount, excluding accrued interest, of allowance for credit loss on net investment in sales-type and direct financing leases.

+ References

+ Details

Name:	us-gaap_NetInvestmentInLeaseAllowanceForCreditLossExcludingAccruedInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	srt_RestatementAxis=srt_RevisionOfPriorPeriodReclassificationAdjustmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=rbcaa_CoreBankingActivitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=rbcaa_TraditionalBankingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=rbcaa_RepublicProcessingGroupMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rbcaa_OwnerOccupiedResidentialRealEstateLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rbcaa_NonOwnerOccupiedResidentialRealEstateLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_HomeEquityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=rbcaa_ConstructionAndLandDevelopmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rbcaa_CommercialAndIndustrialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=rbcaa_AircraftPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CreditCardReceivablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rbcaa_ConsumerOverdraftFinancingReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_AutomobileLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rbcaa_OtherConsumerFinancingReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=rbcaa_WarehousePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=rbcaa_WarehouseLendingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=rbcaa_TaxRefundSolutionsPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rbcaa_RefundAdvancesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rbcaa_OtherTrsLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=rbcaa_RepublicCreditSolutionsPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: