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Other Real Estate Owned - Changes in Company’s OREO (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Total OREO |  |
Beginning balance | $ 1,763 | $ 2,540
Transfers of loans | 10,738 | 2,207
Impairments | (18) | (110)
Dispositions | (2,840) | (2,875)
Other | (21) | 1
Ending balance | $ 9,622 | $ 1,763

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- Definition Other Real Estate Impairments + References No definition available. + Details
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Namespace Prefix: | rnst_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Other Real Estate, Other + References No definition available. + Details
Name: | rnst_OtherRealEstateOther
Namespace Prefix: | rnst_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Other real estate transfers of loans. + References No definition available. + Details
Name: | rnst_OtherRealEstateTransfersOfLoans
Namespace Prefix: | rnst_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Total OREO [Abstract] + References No definition available. + Details
Name: | rnst_TotalOREORollForward
Namespace Prefix: | rnst_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Carrying amount of other real estate not separately disclosed, including, but not limited to, real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. This does not include real estate assets taken in settlement of troubled loans through surrender or foreclosure. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10(4)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 + Details
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- Definition Disposals of other real estate not separately disclosed, including, but not limited to, real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. This excludes real estate assets taken in settlement of troubled loans through surrender or foreclosure. + References No definition available. + Details
Name: | us-gaap_OtherRealEstateDisposals
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration