LOANS AND ALLOWANCE FOR CREDIT LOSSES - NONACCRUAL (Details) $ in Thousands	3 Months Ended
Mar. 31, 2020 USD ($) item	Dec. 31, 2019 USD ($)
Aging or recorded investments in loans
Nonaccrual with ACLL	$ 4,212
Nonaccrual with no ACLL	16,146
Nonaccrual	20,358	$ 23,332
Financing Receivable, 90 Days or More Past Due, Still Accruing	495	157
Interest Income Recognized on Nonaccrual Loans	$ 962
Number of consecutive months payments received before non-accrual loans returned to accrual status (in months) \| item	6
Residential Real Estate - Owner Occupied
Aging or recorded investments in loans
Nonaccrual with ACLL	$ 2,909
Nonaccrual with no ACLL	10,211
Nonaccrual	13,120
Interest Income Recognized on Nonaccrual Loans	191
Residential Real Estate - Non Owner Occupied
Aging or recorded investments in loans
Nonaccrual with no ACLL	620
Nonaccrual	620
Interest Income Recognized on Nonaccrual Loans	2
Commercial Real Estate
Aging or recorded investments in loans
Nonaccrual with ACLL	900
Nonaccrual with no ACLL	2,208
Nonaccrual	3,108
Interest Income Recognized on Nonaccrual Loans	727
Commercial & industrial
Aging or recorded investments in loans
Nonaccrual with ACLL	109
Nonaccrual with no ACLL	1,385
Nonaccrual	1,494
Interest Income Recognized on Nonaccrual Loans	11
Home equity lines of credit
Aging or recorded investments in loans
Nonaccrual with ACLL	156
Nonaccrual with no ACLL	1,676
Nonaccrual	1,832
Interest Income Recognized on Nonaccrual Loans	28
Consumer
Aging or recorded investments in loans
Nonaccrual with ACLL	138
Nonaccrual with no ACLL	46
Nonaccrual	184
Interest Income Recognized on Nonaccrual Loans	3
Core Banking Activities
Aging or recorded investments in loans
Nonaccrual	20,358	23,332
Traditional Banking
Aging or recorded investments in loans
Nonaccrual	20,358	23,332
Traditional Banking \| Residential Real Estate - Owner Occupied
Aging or recorded investments in loans
Nonaccrual	13,120	12,220
Traditional Banking \| Residential Real Estate - Non Owner Occupied
Aging or recorded investments in loans
Nonaccrual	620	623
Traditional Banking \| Commercial Real Estate
Aging or recorded investments in loans
Nonaccrual	3,108	6,865
Traditional Banking \| Construction & land development
Aging or recorded investments in loans
Nonaccrual		143
Traditional Banking \| Commercial & industrial
Aging or recorded investments in loans
Nonaccrual	1,494	1,424
Traditional Banking \| Home equity lines of credit
Aging or recorded investments in loans
Nonaccrual	1,832	1,865
Traditional Banking \| Consumer: Automobile loan
Aging or recorded investments in loans
Nonaccrual	169	179
Traditional Banking \| Other consumer
Aging or recorded investments in loans
Nonaccrual	15	13
Republic Processing Group
Aging or recorded investments in loans
Financing Receivable, 90 Days or More Past Due, Still Accruing	495	157
Republic Processing Group \| Other TRS loans
Aging or recorded investments in loans
Financing Receivable, 90 Days or More Past Due, Still Accruing	189	53
Republic Processing Group \| Republic Credit Solutions
Aging or recorded investments in loans
Financing Receivable, 90 Days or More Past Due, Still Accruing	$ 306	$ 104

Represents the number of consecutive months payments received before non-accrual loans are returned to accrual status.

No definition available.

Name:	rbcaa_ConsecutiveMonthsPaymentsReceivedBeforeNonaccrualLoansReturnedToAccrualStatus
Namespace Prefix:	rbcaa_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of financing receivable on nonaccrual status with allowance for credit loss.

+ References

No definition available.

+ Details

Name:	rbcaa_FinancingReceivableNonaccrualWithAllowance
Namespace Prefix:	rbcaa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of interest income on financing receivable on nonaccrual status.

+ References

+ Details

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

- Definition

Amount of financing receivable on nonaccrual status with no allowance for credit loss.

+ References

+ Details

Name:	us-gaap_FinancingReceivableNonaccrualNoAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of financing receivable 90 days or more past due and still accruing.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 16
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919258-210447

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5111-111524

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 55
-Paragraph 80
-URI http://asc.fasb.org/extlink&oid=118955255&loc=SL82922355-210448

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of financing receivable on nonaccrual status.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5111-111524

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 16
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919258-210447

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- 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_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rbcaa_CommercialAndIndustrialMember
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_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rbcaa_ConsumerPurchasedWholeLoansMember
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_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rbcaa_ConstructionAndLandDevelopmentMember
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_StatementBusinessSegmentsAxis=rbcaa_RepublicProcessingGroupMember
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_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rbcaa_RepublicCreditSolutionsDivisionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: