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INVESTMENT SECURITIES - TRUST PREFERRED SECURITY (Details) - Trust Preferred Securities Subject to Mandatory Redemption [Member] $ in Millions | 12 Months Ended
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Dec. 31, 2015 USD ($)
Marketable Securities [Line Items] |
Par value of trust preferred security | $ 5
Interest rate - basis spread | 1.59%
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:SecuredOvernightFinancingRateSofrMember

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- Definition The average percentage points added to the reference rate to compute the variable rate on the group of interest rate on securities. + References No definition available. + Details
Name: | rbcaa_CouponRateAverageBasisSpreadOnVariableRate
Namespace Prefix: | rbcaa_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Par value of trust preferred security. + References No definition available. + Details
Name: | rbcaa_TrustPreferredSecurityParValue
Namespace Prefix: | rbcaa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Indicates type of variable interest rate on debt instrument. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 470 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477734/942-470-50-3 + Details
Name: | us-gaap_DebtInstrumentVariableInterestRateTypeExtensibleEnumeration
Namespace Prefix: | us-gaap_
Data Type: | enum2:enumerationSetItemType
Balance Type: | na
Period Type: | duration

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- 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_MarketableSecuritiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_TrustPreferredSecuritiesSubjectToMandatoryRedemptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |