v3.26.1
Cover - USD ($)
 12 Months Ended
Dec. 31, 2025
Feb. 20, 2026
Jun. 30, 2025
Cover [Abstract]      
Document Type 10-K/A    
Document Annual Report true    
Document Period End Date Dec. 31, 2025    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-13253    
Registrant Name RENASANT CORP    
Entity Incorporation, State or Country Code MS    
Entity Tax Identification Number 64-0676974    
Entity Address, Address Line One 209 Troy Street,    
Entity Address, City or Town Tupelo,    
Entity Address, State or Province MS    
Entity Address, Postal Zip Code 38804-4827    
City Area Code 662    
Local Phone Number 680-1001    
Title of 12(b) Security Common stock, par value $5.00 per share    
Trading Symbol RNST    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 3,347,830,064
Entity Common Stock, Shares Outstanding   94,142,307  
Documents Incorporated by Reference [Text Block]
DOCUMENTS INCORPORATED BY REFERENCE
Portions of the Proxy Statement for the 2026 Annual Meeting of Shareholders of Renasant Corporation are incorporated by reference into Part III of this Form 10-K.
    
Central Index Key 0000715072    
Amendment Flag false    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY