Accrued Interest Receivable Fair Value Disclosure.

No definition available.

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

- Definition

Fair value portion of consumer loans held-for-sale.

+ References

No definition available.

+ Details

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

- Definition

Interest Payable, Fair Value Disclosure.

+ References

No definition available.

+ Details

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

- Definition

Amount, after allowance for bad debt, of line of credit and credit card loan receivables held-for-sale, at lower of cost or fair value, that are not part of a disposal group. Excludes loans and leases covered under loss sharing agreements and loans classified as debt securities.

+ References

No definition available.

+ Details

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

- Definition

Securities Sold Under Agreements To Repurchase And Other Short Term Borrowings, Fair Value Disclosure.

+ References

No definition available.

+ Details

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

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=65884222&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26610-111562

+ Details

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

- Definition

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash
-URI http://asc.fasb.org/extlink&oid=6506951

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash Equivalents
-URI http://asc.fasb.org/extlink&oid=6507016

+ Details

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

- Definition

Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits.

+ References

No definition available.

+ Details

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

- Definition

Fair value portion of borrowing from Federal Home Loan Bank (FHLBank).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.13(3)(a))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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

- References

No definition available.

+ Details

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

- References

No definition available.

+ Details

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

- Definition

Fair value of investments in debt securities classified as held-to-maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563

+ Details

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

- Definition

Fair value portion of investments in Federal Home Loan Bank (FHLBank) stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 325
-SubTopic 20
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=29638263&loc=d3e39828-111592

+ Details

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

- Definition

Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Glossary Loan
-URI http://asc.fasb.org/extlink&oid=6517073

+ Details

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

- Definition

Fair value portion of mortgage loans held-for-sale.

+ References

No definition available.

+ Details

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

- Definition

Fair value portion of notes payable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19,20,22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Details

Name:	us-gaap_FairValueByMeasurementBasisAxis=us-gaap_CarryingReportedAmountFairValueDisclosureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByLiabilityClassAxis=rbcaa_NonInterestBearingDepositsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByLiabilityClassAxis=rbcaa_TransactionAndMoneyMarketDepositsLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByLiabilityClassAxis=us-gaap_BankTimeDepositsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByMeasurementBasisAxis=us-gaap_EstimateOfFairValueFairValueDisclosureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

FAIR VALUE - CARRYING AMOUNTS AND FV OF FINANCIAL INSTRUMENTS (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Assets:
Securities available for sale	$ 527,231	$ 481,275
Securities to be held to maturity	65,133	53,249
Aggregate fair value of mortgage loan	5,761	11,662	$ 4,083	$ 6,388
Aggregate fair value of consumer loan	2,677	2,198
Consumer loans held for sale, at the lower of cost or fair value	8,551	1,310	$ 514
Carrying Value
Assets:
Cash and cash equivalents	299,351	289,309
Securities available for sale	527,231	481,275
Securities to be held to maturity	64,227	52,864
Aggregate fair value of mortgage loan	5,761	11,662
Aggregate fair value of consumer loan	2,677	2,198
Consumer loans held for sale, at the lower of cost or fair value	8,551	1,310
Loans, net	3,971,265	3,777,858
Federal Home Loan Bank stock	32,067	28,208
Accrued interest receivable	12,082	10,356
Liabilities:
Securities sold under agreements to repurchase and other short-term borrowings	204,021	173,473
Federal Home Loan Bank advances	737,500	802,500
Subordinated note	41,240	41,240
Accrued interest payable	1,100	948
Carrying Value \| Non Interest Bearing Deposits
Liabilities:
Deposit liabilities, fair value	1,022,042	971,952
Carrying Value \| Transaction deposits
Liabilities:
Deposit liabilities, fair value	2,049,493	1,939,338
Carrying Value \| Time deposits.
Liabilities:
Deposit liabilities, fair value	361,623	249,417
Total Fair Value
Assets:
Cash and cash equivalents	299,351	289,309
Securities available for sale	527,231	481,275
Securities to be held to maturity	65,133	53,249
Aggregate fair value of mortgage loan	5,761	11,662
Aggregate fair value of consumer loan	2,677	2,198
Consumer loans held for sale, at the lower of cost or fair value	8,551	1,310
Loans, net	3,938,998	3,757,698
Accrued interest receivable	12,082	10,356
Liabilities:
Securities sold under agreements to repurchase and other short-term borrowings	204,021	173,473
Federal Home Loan Bank advances	730,712	798,594
Subordinated note	31,763	30,821
Accrued interest payable	1,100	948
Total Fair Value \| Non Interest Bearing Deposits
Liabilities:
Deposit liabilities, fair value	1,022,042	971,952
Total Fair Value \| Transaction deposits
Liabilities:
Deposit liabilities, fair value	2,049,493	1,939,338
Total Fair Value \| Time deposits.
Liabilities:
Deposit liabilities, fair value	358,627	248,684
Total Fair Value \| Fair Value, Inputs, Level 1
Assets:
Cash and cash equivalents	299,351	289,309
Securities available for sale	2,455	2,455
Total Fair Value \| Fair Value, Inputs, Level 2
Assets:
Securities available for sale	516,727	470,843
Securities to be held to maturity	65,133	53,249
Aggregate fair value of mortgage loan	5,761	11,662
Consumer loans held for sale, at the lower of cost or fair value	8,551	1,310
Accrued interest receivable	12,082	10,356
Liabilities:
Securities sold under agreements to repurchase and other short-term borrowings	204,021	173,473
Federal Home Loan Bank advances	730,712	798,594
Subordinated note	31,763	30,821
Accrued interest payable	1,100	948
Total Fair Value \| Fair Value, Inputs, Level 2 \| Non Interest Bearing Deposits
Liabilities:
Deposit liabilities, fair value	1,022,042	971,952
Total Fair Value \| Fair Value, Inputs, Level 2 \| Transaction deposits
Liabilities:
Deposit liabilities, fair value	2,049,493	1,939,338
Total Fair Value \| Fair Value, Inputs, Level 2 \| Time deposits.
Liabilities:
Deposit liabilities, fair value	358,627	248,684
Total Fair Value \| Fair Value, Inputs, Level 3
Assets:
Securities available for sale	8,049	7,977
Aggregate fair value of consumer loan	2,677	2,198
Loans, net	3,938,998	3,757,698
Recurring basis
Assets:
Securities available for sale	527,231	481,275
Aggregate fair value of mortgage loan	5,761	11,662
Aggregate fair value of consumer loan	2,677	2,198
Recurring basis \| Fair Value, Inputs, Level 1
Assets:
Securities available for sale	2,455	2,455
Recurring basis \| Fair Value, Inputs, Level 2
Assets:
Securities available for sale	516,727	470,843
Aggregate fair value of mortgage loan	5,761	11,662
Recurring basis \| Fair Value, Inputs, Level 3
Assets:
Securities available for sale	8,049	7,977
Aggregate fair value of consumer loan	$ 2,677	$ 2,198