LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES - PORTFOLIO CLASS (Details) $ in Thousands	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Allowance for loans losses
Individually evaluated for impairment, excluding PCI loans	$ 2,321	$ 3,300
Collectively evaluated for impairment	40,839	40,911
PCI loans with post acquisition impairment	191	464
Total ending allowance for loan losses	43,351	44,675	$ 42,769	$ 32,920
Impaired loans individually evaluated, excluding PCI loans	48,287	38,782
Loans collectively evaluated for impairment	4,382,778	4,106,765
PCI loans with post acquisition impairment	2,063	2,653
PCI loans without post acquisition impairment	23	27
Carrying value of loans	$ 4,433,151	$ 4,148,227
Allowance to Total Loans	0.98	1.08
Residential Real Estate - Owner Occupied
Allowance for loans losses
Carrying value of loans	$ 949,568	$ 1,001,832
Residential Real Estate - Non Owner Occupied
Allowance for loans losses
Carrying value of loans	258,803	242,846
Home equity lines of credit
Allowance for loans losses
Carrying value of loans	293,186	332,548
Consumer: Credit cards
Allowance for loans losses
Carrying value of loans	17,836	19,095
Consumer: Overdrafts
Allowance for loans losses
Carrying value of loans	1,522	1,102
Consumer: Automobile loan
Allowance for loans losses
Carrying value of loans	52,923	63,475
Other consumer
Allowance for loans losses
Carrying value of loans	68,115	46,642
Republic Credit Solutions
Allowance for loans losses
Carrying value of loans	105,397	88,744
Core Banking Activities
Allowance for loans losses
Individually evaluated for impairment, excluding PCI loans	2,205	3,282
Collectively evaluated for impairment	27,603	27,773
PCI loans with post acquisition impairment	191	464
Total ending allowance for loan losses	29,999	31,519	30,147	27,928
Impaired loans individually evaluated, excluding PCI loans	48,036	38,738
Loans collectively evaluated for impairment	4,263,267	4,004,321
PCI loans with post acquisition impairment	2,063	2,653
PCI loans without post acquisition impairment	23	27
Carrying value of loans	$ 4,313,389	$ 4,045,739
Allowance to Total Loans	0.70	0.78
Traditional Banking
Allowance for loans losses
Individually evaluated for impairment, excluding PCI loans	$ 2,205	$ 3,282
Collectively evaluated for impairment	25,809	26,601
PCI loans with post acquisition impairment	191	464
Total ending allowance for loan losses	28,205	30,347	28,833	26,464
Impaired loans individually evaluated, excluding PCI loans	48,036	38,738
Loans collectively evaluated for impairment	3,545,809	3,535,626
PCI loans with post acquisition impairment	2,063	2,653
PCI loans without post acquisition impairment	23	27
Carrying value of loans	$ 3,595,931	$ 3,577,044
Allowance to Total Loans	0.78	0.85
Traditional Banking \| Residential Real Estate - Owner Occupied
Allowance for loans losses
Individually evaluated for impairment, excluding PCI loans	$ 1,207	$ 2,052
Collectively evaluated for impairment	3,337	3,602
PCI loans with post acquisition impairment	185	381
Total ending allowance for loan losses	4,729	6,035	6,474	7,531
Impaired loans individually evaluated, excluding PCI loans	25,384	25,242
Loans collectively evaluated for impairment	922,764	974,945
PCI loans with post acquisition impairment	1,420	1,645
Carrying value of loans	$ 949,568	$ 1,001,832
Allowance to Total Loans	0.50	0.60
Traditional Banking \| Residential Real Estate - Non Owner Occupied
Allowance for loans losses
Individually evaluated for impairment, excluding PCI loans		$ 4
Collectively evaluated for impairment	$ 1,737	1,658
Total ending allowance for loan losses	1,737	1,662	1,396	1,139
Impaired loans individually evaluated, excluding PCI loans	1,448	2,406
Loans collectively evaluated for impairment	257,355	240,440
Carrying value of loans	$ 258,803	$ 242,846
Allowance to Total Loans	0.67	0.68
Traditional Banking \| Commercial Real Estate
Allowance for loans losses
Individually evaluated for impairment, excluding PCI loans	$ 426	$ 294
Collectively evaluated for impairment	10,054	9,727
PCI loans with post acquisition impairment	6	9
Total ending allowance for loan losses	10,486	10,030	9,043	8,078
Impaired loans individually evaluated, excluding PCI loans	15,144	8,104
Loans collectively evaluated for impairment	1,287,225	1,239,915
PCI loans with post acquisition impairment	631	919
PCI loans without post acquisition impairment		2
Carrying value of loans	$ 1,303,000	$ 1,248,940
Allowance to Total Loans	0.80	0.80
Traditional Banking \| Construction & land development
Allowance for loans losses
Individually evaluated for impairment, excluding PCI loans		$ 4
Collectively evaluated for impairment	$ 2,152	2,551
Total ending allowance for loan losses	2,152	2,555	2,364	1,850
Impaired loans individually evaluated, excluding PCI loans	198	65
Loans collectively evaluated for impairment	159,504	175,113
Carrying value of loans	$ 159,702	$ 175,178
Allowance to Total Loans	1.35	1.46
Traditional Banking \| Commercial & industrial
Allowance for loans losses
Individually evaluated for impairment, excluding PCI loans	$ 22	$ 130
Collectively evaluated for impairment	2,860	2,743
Total ending allowance for loan losses	2,882	2,873	2,198	1,511
Impaired loans individually evaluated, excluding PCI loans	1,989	1,020
Loans collectively evaluated for impairment	475,225	429,310
PCI loans without post acquisition impairment	22	25
Carrying value of loans	$ 477,236	$ 430,355
Allowance to Total Loans	0.60	0.67
Traditional Banking \| Lease Financing Receivables
Allowance for loans losses
Collectively evaluated for impairment	$ 147	$ 158
Total ending allowance for loan losses	147	158	174	136
Loans collectively evaluated for impairment	14,040	15,031
Carrying value of loans	$ 14,040	$ 15,031
Allowance to Total Loans	1.05	1.05
Traditional Banking \| Home equity lines of credit
Allowance for loans losses
Individually evaluated for impairment, excluding PCI loans	$ 174	$ 286
Collectively evaluated for impairment	2,547	3,117
PCI loans with post acquisition impairment		74
Total ending allowance for loan losses	2,721	3,477	3,754	3,757
Impaired loans individually evaluated, excluding PCI loans	3,276	1,361
Loans collectively evaluated for impairment	289,900	331,101
PCI loans with post acquisition impairment	10	86
Carrying value of loans	$ 293,186	$ 332,548
Allowance to Total Loans	0.93	1.05
Traditional Banking \| Consumer: Credit cards
Allowance for loans losses
Collectively evaluated for impairment	$ 1,020	$ 1,140
Total ending allowance for loan losses	1,020	1,140	607	490
Loans collectively evaluated for impairment	17,836	19,095
Carrying value of loans	$ 17,836	$ 19,095
Allowance to Total Loans	5.72	5.97
Traditional Banking \| Consumer: Overdrafts
Allowance for loans losses
Collectively evaluated for impairment	$ 1,169	$ 1,102
Total ending allowance for loan losses	1,169	1,102	974	675
Loans collectively evaluated for impairment	1,522	1,102
Carrying value of loans	$ 1,522	$ 1,102
Allowance to Total Loans	76.81	100.00
Traditional Banking \| Consumer: Automobile loan
Allowance for loans losses
Individually evaluated for impairment, excluding PCI loans	$ 43	$ 91
Collectively evaluated for impairment	569	633
Total ending allowance for loan losses	612	724	687	526
Impaired loans individually evaluated, excluding PCI loans	247	91
Loans collectively evaluated for impairment	52,676	63,384
Carrying value of loans	$ 52,923	$ 63,475
Allowance to Total Loans	1.16	1.14
Traditional Banking \| Other consumer
Allowance for loans losses
Individually evaluated for impairment, excluding PCI loans	$ 333	$ 421
Collectively evaluated for impairment	217	170
Total ending allowance for loan losses	550	591	1,162	771
Impaired loans individually evaluated, excluding PCI loans	350	449
Loans collectively evaluated for impairment	67,762	46,190
PCI loans with post acquisition impairment	2	3
PCI loans without post acquisition impairment	1
Carrying value of loans	$ 68,115	$ 46,642
Allowance to Total Loans	0.81	1.27
Warehouse Lending \| Warehouse lines of credit
Allowance for loans losses
Collectively evaluated for impairment	$ 1,794	$ 1,172
Total ending allowance for loan losses	1,794	1,172	1,314	1,464
Loans collectively evaluated for impairment	717,458	468,695
Carrying value of loans	$ 717,458	$ 468,695
Allowance to Total Loans	0.25	0.25
Republic Processing Group
Allowance for loans losses
Individually evaluated for impairment, excluding PCI loans	$ 116	$ 18
Collectively evaluated for impairment	13,236	13,138
Total ending allowance for loan losses	13,352	13,156	12,622	4,992
Impaired loans individually evaluated, excluding PCI loans	251	44
Loans collectively evaluated for impairment	119,511	102,444
Carrying value of loans	$ 119,762	$ 102,488
Allowance to Total Loans	11.15	12.84
Republic Processing Group \| Other TRS loans
Allowance for loans losses
Collectively evaluated for impairment	$ 234	$ 107
Total ending allowance for loan losses	234	107	12	25
Loans collectively evaluated for impairment	14,365	13,744
Carrying value of loans	$ 14,365	$ 13,744
Allowance to Total Loans	1.63	0.78
Republic Processing Group \| Republic Credit Solutions
Allowance for loans losses
Individually evaluated for impairment, excluding PCI loans	$ 116	$ 18
Collectively evaluated for impairment	13,002	13,031
Total ending allowance for loan losses	13,118	13,049	$ 12,610	$ 4,967
Impaired loans individually evaluated, excluding PCI loans	251	44
Loans collectively evaluated for impairment	105,146	88,700
Carrying value of loans	$ 105,397	$ 88,744
Allowance to Total Loans	12.45	14.70

Represents the valuation allowance related to purchased credit impaired loans with post acquisition impairment.

No definition available.

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

- Definition

Represents the balance of purchased credit impaired loans with post acquisition impairment.

+ References

No definition available.

+ Details

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

- Definition

Represents the balance of purchased credit impaired loans without post acquisition impairment.

+ References

No definition available.

+ Details

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

- Definition

Percentage of allowance to cover probable credit losses on loans and leases to gross carrying amount.

+ References

No definition available.

+ Details

Name:	rbcaa_LoansAndLeasesReceivableAllowanceToGrossCarryingAmountPercentage
Namespace Prefix:	rbcaa_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524

+ Details

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

- Definition

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

+ References

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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_FinancingReceivableAllowanceForCreditLossesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The balance of financing receivables that were collectively evaluated for impairment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524

+ Details

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

- Definition

The balance of financing receivables that were individually evaluated for impairment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524

+ Details

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

- Definition

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7(d))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (b)(1)(ii)
-URI http://asc.fasb.org/extlink&oid=118939070&loc=d3e15032-111544

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 6.L.1)
-URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707

+ Details

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

- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522

+ Details

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

- 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_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rbcaa_ConsumerCreditCardsFinancingReceivableMember
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_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rbcaa_RepublicCreditSolutionsDivisionMember
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=us-gaap_CommercialRealEstatePortfolioSegmentMember
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=rbcaa_CommercialAndIndustrialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_FinanceLeasesPortfolioSegmentMember
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_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rbcaa_WarehouseLinesOfCreditFinancingReceivableMember
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: