XML 58 R47.htm IDEA: XBRL DOCUMENT v3.25.1

Loans - Narrative (Details)	3 Months Ended
	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Mortgage and commercial loans discontinued past due period	90 days
Consumer and other retail loans charged-off past due period	120 days
Unused commitments	$ 0	$ 85,000
Provision for (recovery of) credit losses on unfunded loan commitments	$ 2,700,000	$ (200,000)
Internal Investment Grade
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, credit quality risk rating grade	10
Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, credit quality risk rating grade	70
Minimum | Internal Investment Grade
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, credit quality risk rating grade	10
Minimum | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, credit quality risk rating grade	10
Minimum | Substandard
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, credit quality risk rating grade	80
Maximum | Internal Investment Grade
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, credit quality risk rating grade	95
Maximum | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, credit quality risk rating grade	60
Maximum | Substandard
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, credit quality risk rating grade	95

X

- Definition

Consumer and other retail loans charged off past due period.

+ References

No definition available.

+ Details

Name:	rnst_ConsumerAndOtherRetailLoansChargedOffPastDuePeriod
Namespace Prefix:	rnst_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Financing Receivable, Internal Risk-rating Grade

+ References

No definition available.

+ Details

Name:	rnst_FinancingReceivableInternalRiskRatingGrade
Namespace Prefix:	rnst_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Mortgage and commercial loans discontinued past due period.

+ References

No definition available.

+ Details

Name:	rnst_MortgageAndCommercialLoansDiscontinuedPastDuePeriod
Namespace Prefix:	rnst_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- 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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph c
-Publisher SEC

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

+ Details

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

X

- Definition

Amount of expense (reversal of expense) for expected credit loss for off-balance sheet credit exposure. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

+ Details

Name:	us-gaap_OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Unused amount of commitments to extend credit to customers.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_InternalInvestmentGradeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_SpecialMentionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_PassMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_SubstandardMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: