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v3.25.0.1

Self-Insurance (Details) $ in Thousands | Dec. 31, 2024 USD ($)
--- | ---
Insurance [Abstract] |
Liability, deductible | $ 135
Maximum coverage by the group | $ 4,500

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- Definition Self Insurance, Aggregate Policy Deductible Per Individual + References No definition available. + Details
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Namespace Prefix: | rrbi_
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- Definition Self Insurance, Maximum Aggregate Policy Deductible Per Group + References No definition available. + Details
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Namespace Prefix: | rrbi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration