Entity Tax Identification Number Entity Tax Identification Number Rollovers EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover Maximum Maximum [Member] Legal Entity [Axis] Legal Entity [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] EBP, Description of Plan [Table] EBP, Description of Plan [Table] Mutual funds Mutual Fund [Member] Subsequent Event Subsequent Event [Member] Renasant Bank Moderate Growth Account EBP, Self-Directed Brokerage Account, Renasant Bank Moderate Growth Account [Member] EBP, Self-Directed Brokerage Account, Renasant Bank Moderate Growth Account EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Table] Total deductions EBP, Change in Net Asset Available for Benefit, Decrease Separately managed accounts EBP, Self-Directed Brokerage Account [Member] Maximum borrowing amount EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount Fair Value Measurements EBP, Investment, Fair Value and NAV [Text Block] Renasant Bank Income Account EBP, Self-Directed Brokerage Account, Renasant Bank Income Account [Member] EBP, Self-Directed Brokerage Account, Renasant Bank Income Account Nondiscretionary Profit Sharing Contribution Vesting Schedule EBP, Nondiscretionary Profit Sharing Contribution Vesting Schedule [Table Text Block] EBP, Nondiscretionary Profit Sharing Contribution Vesting Schedule Total investments EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value Subsequent Event Type [Domain] Subsequent Event Type [Domain] Two, but less than three (percent) EBP, Nondiscretionary Profit Sharing Contribution Vesting Percentage, Two, But Less Than Three Years EBP, Nondiscretionary Profit Sharing Contribution Vesting Percentage, Two, But Less Than Three Years Note receivable from participant, primary residence, maximum borrowing term EBP, Note Receivable From Participant, Account, Primary Residence, Maximum Borrowing Term EBP, Note Receivable From Participant, Account, Primary Residence, Maximum Borrowing Term Level 1 Fair Value, Inputs, Level 1 [Member] Four, but less than five (percent) EBP, Nondiscretionary Profit Sharing Contribution Vesting Percentage, Four, But Less Than Five Years EBP, Nondiscretionary Profit Sharing Contribution Vesting Percentage, Four, But Less Than Five Years EBP, Investment, Fair Value and NAV [Abstract] Total EBP, Asset Statistical Measurement [Axis] Statistical Measurement [Axis] EBP, Statement of Change in Net Asset Available for Benefit [Table] EBP, Statement of Change in Net Asset Available for Benefit [Table] Transfer of assets into plan EBP, Change in Net Asset Available for Benefit, Transfer to (from) Plan Amendment Flag Amendment Flag Less than two (percent) EBP, Nondiscretionary Profit Sharing Contribution Vesting Percentage, Less Than Two Years EBP, Nondiscretionary Profit Sharing Contribution Vesting Percentage, Less Than Two Years Basis of Accounting EBP, Basis of Accounting [Policy Text Block] EBP, Schedule of Asset Held for Investment [Table] EBP, Schedule of Asset Held for Investment [Table] Investment, number of shares (in shares) EBP, Investment, Number of Shares EBP, Description of Plan and Accounting Change [Abstract] Receivables EBP, Receivable [Abstract] EBP, Investment, Fair Value and NAV EBP, Investment, Fair Value and NAV [Table Text Block] Investments [Domain] Investments [Domain] Use of Estimates EBP, Use of Estimate [Policy Text Block] Schedule H, Line 4i, Schedule of Assets (Held At End of Year) EBP, Schedule of Asset Held for Investment [Text Block] Cover [Abstract] Risks and Uncertainties EBP, Risk and Uncertainty [Text Block] Company EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash 401 (k) Plan EBP, 401 (k) Plan [Member] EBP, 401 (k) Plan Balance eligible for rollover upon termination EBP, Balance Eligible for Rollover Upon Termination EBP, Balance Eligible for Rollover Upon Termination Minimum Minimum [Member] Investment Type [Axis] Investment Type [Axis] Total contributions EBP, Change in Net Asset Available for Benefit, Increase from Contribution Participants EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Excluding Rollover Net appreciation in fair value of investments EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment EBP, Description of Plan [Line Items] EBP, Description of Plan [Line Items] EBP, Investment, Fair Value and NAV [Line Items] EBP, Investment, Fair Value and NAV [Line Items] Description of Plan EBP, Description of Plan [Text Block] EBP, Statement of Change in Net Asset Available for Benefit [Line Items] EBP, Statement of Change in Net Asset Available for Benefit [Line Items] EBP, Statement of Net Asset Available for Benefit [Table] EBP, Statement of Net Asset Available for Benefit [Table] EBP, Schedule of Asset Held for Investment [Line Items] EBP, Schedule of Asset Held for Investment [Line Items] Interest EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Investment Renasant Corporation common stock EBP, Employer, Common Stock [Member] EBP, Schedule of Asset Held for Investment [Abstract] EBP, Accounting Policy [Table] EBP, Accounting Policy [Table] Investment income EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment [Abstract] Investment, Identifier [Axis] Investment, Identifier [Axis] Administrative expenses and fees EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Common stock, par value (in dollars per share) EBP, Common Stock, Par Value EBP, Common Stock, Par Value Document Information [Line Items] Document Information [Line Items] Basis spread on variable rate EBP, Participant Loan, Basis Spread On Variable Rate EBP, Participant Loan, Basis Spread On Variable Rate EBP, Risk and Uncertainty [Line Items] EBP, Risk and Uncertainty [Line Items] EBP, Risk and Uncertainty [Table] EBP, Risk and Uncertainty [Table] Involuntary cash-out EBP, Involuntary Cash-out Limit EBP, Involuntary Cash-out Limit Note receivable from participant, maximum borrowing term EBP, Note Receivable From Participant, General Loan, Maximum Borrowing Term EBP, Note Receivable From Participant, General Loan, Maximum Borrowing Term Participant compensation matched, percentage EBP, Employer Contribution, Participant Compensation Matched, Percentage EBP, Statement of Change in Net Asset Available for Benefit [Abstract] Renasant Bank Growth Account EBP, Self-Directed Brokerage Account, Renasant Bank Growth Account [Member] EBP, Self-Directed Brokerage Account, Renasant Bank Growth Account Three, but less than four (percent) EBP, Nondiscretionary Profit Sharing Contribution Vesting Percentage, Three, But Less Than Four Years EBP, Nondiscretionary Profit Sharing Contribution Vesting Percentage, Three, But Less Than Four Years Subsequent Event Type [Axis] Subsequent Event Type [Axis] EBP, Tax Status [Table] EBP, Tax Status [Table] Net increase in net assets available for benefits EBP, Change in Net Asset Available for Benefit, Increase (Decrease) Related Party Transactions and Party-in-Interest Transactions EBP, Related Party and Party-in-Interest Transactions [Text Block] EBP, Related Party and Party-in-Interest Transactions [Abstract] EBP, Accounting Policy, Accounting Standard Update, and Change in Accounting Principle [Abstract] Total receivables EBP, Receivable Renasant Bank Conservative Growth Account EBP, Self-Directed Brokerage Account, Renasant Bank Conservative Growth Account [Member] EBP, Self-Directed Brokerage Account, Renasant Bank Conservative Growth Account Company contributions EBP, Employer Contribution, Receivable Investments sold EBP, Investment Sold, Excluding Plan Interest in Master Trust, Cost Automatic deferral rate EBP, Participant Contribution, Automatic, Deferral Rate Investments, at fair value EBP, Investment, Fair Value [Abstract] Benefits paid to participants EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Dividends EBP, Change in Net Asset Available for Benefit, Increase from Dividend Income on Investment Investments EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] EBP, Statement of Net Asset Available for Benefit [Abstract] EBP, Accounting Policy [Line Items] EBP, Accounting Policy [Line Items] EBP, Tax Status [Abstract] Renasant Bank Aggressive Growth Account EBP, Self-Directed Brokerage Account, Renasant Bank Aggressive Growth Account [Member] EBP, Self-Directed Brokerage Account, Renasant Bank Aggressive Growth Account Note receivable from participant, minimum borrowing term EBP, Note Receivable From Participant, General Loan, Minimum Borrowing Term EBP, Note Receivable From Participant, General Loan, Minimum Borrowing Term Investment Valuation and Income Recognition EBP, Investment [Policy Text Block] Participant contributions EBP, Participant Contribution, Receivable Fair Value, Inputs, Level 1, Level 2, and Level 3 Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] Document Type Document Type Plan Termination EBP, Plan Termination [Text Block] Entity Central Index Key Entity Central Index Key Participant loan, interest rate EBP, Asset Held for Investment, Participant Loan, Interest Rate EBP, Tax Status [Line Items] EBP, Tax Status [Line Items] EBP, Risk and Uncertainty [Abstract] Deductions EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] Nonvested account, forfeitures EBP, Forfeited Nonvested Account, Decrease from Employer Contribution Notes receivable from participants EBP, Note Receivable from Participant Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Summary of Accounting Policies EBP, Summary of Accounting Policy [Text Block] Entity Registrant Name Entity Registrant Name Investments purchased EBP, Investment Acquired, Excluding Plan Interest in Master Trust, Cost Safe harbor matching contribution vesting (percent) EBP, Safe Harbor Matching Contribution Vesting, Percent EBP, Safe Harbor Matching Contribution Vesting, Percent Investment, cost EBP, Investment, Excluding Plan Interest in Master Trust, Cost Subsequent Events EBP, Subsequent Event [Policy Text Block] Tax Status EBP, Tax Status [Text Block] Maximum borrowing, to total account, percentage EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage Document Information [Table] Document Information [Table] Safe harbor matching contribution vesting, years of service EBP, Safe Harbor Matching Contribution Vesting, Period of Service EBP, Safe Harbor Matching Contribution Vesting, Period of Service Note Receivable from Participants EBP, Note Receivable from Participant [Policy Text Block] Total investment income EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment Annual hours of service EBP, Service Hours EBP, Service Hours Five, but less than six (percent) EBP, Nondiscretionary Profit Sharing Contribution Vesting Percentage, Five, But Less Than Six Years EBP, Nondiscretionary Profit Sharing Contribution Vesting Percentage, Five, But Less Than Six Years EBP, Related Party and Party-in-Interest Transactions [Line Items] EBP, Related Party and Party-in-Interest Transactions [Line Items] Net assets available for benefits Net assets available for benefits, Beginning of year Net assets available for benefits, End of year EBP, Net Asset Available for Benefit Entity [Domain] Entity [Domain] Prime rate EBP, Participant Loan, Prime Rate EBP, Participant Loan, Prime Rate Contributions EBP, Change in Net Asset Available for Benefit, Increase from Contribution [Abstract] Forfeited nonvested account EBP, Forfeited Nonvested Account EBP, Investment, Fair Value and NAV [Table] EBP, Investment, Fair Value and NAV [Table] Six or more (percent) EBP, Nondiscretionary Profit Sharing Contribution Vesting Percentage, Six or More Years EBP, Nondiscretionary Profit Sharing Contribution Vesting Percentage, Six or More Years EBP, Statement of Net Asset Available for Benefit [Line Items] EBP, Statement of Net Asset Available for Benefit [Line Items]