LOANS HELD FOR SALE (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Carried at fair value
Balance, beginning of period	$ 2,677	$ 2,198
Origination of consumer loans held for sale	10,439	12,238
Proceeds from the sale of consumer loans held for sale	(10,760)	(10,783)
Net gain on sale of consumer loans held for sale	63	26
Balance, end of period	2,419	3,679
Carried at lower of cost or fair value
Balance, beginning of period	8,551	1,310
Origination of consumer loans held for sale	154,057	114,686
Proceeds from the sale of consumer loans held for sale	(156,802)	(115,658)
Net gain on sale of consumer loans held for sale	1,574	1,082
Balance, end of period	$ 7,380	$ 1,420
Republic Credit Solutions \| Installment loan
Loans held for sale
Percentage of loan receivable held for sale (as a percent)	100.00%
Consumer loans held for sale period	21 days
Republic Credit Solutions \| Line of credit and credit card
Loans held for sale
Percentage of loan receivable held for sale (as a percent)	90.00%
Consumer loans held for sale period	2 days
Interest retained (as a percent)	10.00%

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

No definition available.

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

- Definition

Represents information pertaining to the ownership interest retained from consumer loans held for sale.

+ References

No definition available.

+ Details

Name:	rbcaa_ConsumerLoansHeldForSaleInterestRetained
Namespace Prefix:	rbcaa_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents information pertaining to consumer loans held for sale period within origination.

+ References

No definition available.

+ Details

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

- Definition

Represents information pertaining to gain or loss on sales of consumer loans, at fair value.

+ References

No definition available.

+ Details

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

- Definition

Represents information pertaining to gain or loss on sales of consumer loans lower of cost or fair value.

+ References

No definition available.

+ Details

Name:	rbcaa_GainLossOnSalesOfConsumerLoansLowerOfCostOrFairValue
Namespace Prefix:	rbcaa_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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_LoansHeldForSaleAtFairValueRollForward
Namespace Prefix:	rbcaa_
Data Type:	xbrli:stringItemType
Balance Type:	na
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_LoansHeldForSaleAtLowerOfCostOrFairValueRollForward
Namespace Prefix:	rbcaa_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- 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:	rbcaa_LoansHeldForSaleLineItems
Namespace Prefix:	rbcaa_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- 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

The amount of cash paid for the origination of consumer loans, at fair value).

+ References

No definition available.

+ Details

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

- Definition

The amount of cash paid for the origination of consumer loans that are held for sale (lower of cost or fair value).

+ References

No definition available.

+ Details

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

- Definition

Represents information pertaining to percentage of consumer loans receivables held for sale.

+ References

No definition available.

+ Details

Name:	rbcaa_PercentageOfLoanReceivableHeldForSale
Namespace Prefix:	rbcaa_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash inflow resulting from the sale of consumer loans that are held with the intention to resell in the near future, at fair value.

+ References

No definition available.

+ Details

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

- Definition

The cash inflow resulting from the sale of consumer loans that are held with the intention to resell in the near future (lower of cost or fair value).

+ References

No definition available.

+ Details

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

- Details

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

- Details

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

- Details

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