Summary of Significant Accounting Policies	3 Months Ended
Summary of Significant Accounting Policies	Mar. 31, 2026
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies (In Thousands) Nature of Operations: Renasant Corporation (referred to herein as the “Company”) owns and operates Renasant Bank (“Renasant Bank” or the “Bank”), Park Place Capital Corporation and Continental Republic Capital, LLC (doing business as “Republic Business Credit”). Through its subsidiaries, the Company offers a diversified range of financial, wealth management and fiduciary services to its retail and commercial customers from offices located throughout the Southeast and offers factoring and asset-based lending on a nationwide basis. Basis of Presentation: The accompanying unaudited consolidated financial statements of the Company and its subsidiaries have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair statement of the results for the interim periods presented have been included. For further information regarding the Company’s significant accounting policies, refer to the audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2025 filed with the Securities and Exchange Commission (the “SEC”). Use of Estimates: The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates, and such differences may be material. Material estimates that are particularly susceptible to change include the allowance for credit losses and the fair value of assets acquired and liabilities assumed as part of a business acquisition. Impact of Recently-Issued Accounting Standards and Pronouncements: In November 2024, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2024-03, “Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses” (“ASU 2024-03”), which amends the disclosure requirements in the notes to financial statements of specified information about certain costs and expenses. ASU 2024-03 will be effective January 1, 2027 and is not expected to have a significant impact on the Company’s financial statements. In November 2025, FASB issued ASU 2025-08, “Financial Instruments - Credit Losses (Topic 326): Purchased Loans” (“ASU 2025-08”), which amends the guidance on accounting for purchased loans under the current expected credit losses model. The amendments clarify and refine the measurement and recognition requirements for purchased financial assets with credit deterioration and other purchased loans, including guidance on determining the initial allowance for credit losses, the treatment of noncredit discounts and premiums, and subsequent measurement considerations. The standard is intended to improve consistency in practice and reduce complexity in applying the CECL model to purchased loan portfolios. ASU 2025-08 will be effective January 1, 2027, and shall be applied prospectively. The Company is currently evaluating the impact of this guidance on its consolidated financial statements and related disclosures, including the potential effects on the allowance for credit losses and net interest income. The actual impact will depend on the volume and characteristics of loan portfolios purchased after the effective date. In November 2025, FASB issued ASU 2025-09, “Derivatives and Hedging (Topic 815): Hedge Accounting Improvements” (“ASU 2025-09”), which enables entities to apply hedge accounting to a greater number of highly effective economic hedges in the following areas: (1) similar risk assessment for cash flow hedges, (2) hedging forecasted interest payments on choose-your-rate debt instruments, (3) cash flow hedges of nonfinancial forecasted transactions, (4) net written options as hedging instruments, and (5) foreign-currency-denominated debt instrument as hedging instrument and hedged item (dual hedge). ASU 2025-09 will be effective January 1, 2028, and is not expected to have a material impact on the Company's consolidated financial position or results of operations, but it may affect the timing and presentation of gains and losses related to hedging activities and result in expanded disclosures.