v3.25.4
Cover Page - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Mar. 11, 2026
Jun. 30, 2025
Cover [Abstract]      
Document Type 10-K    
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 1-13445    
Entity Registrant Name Sonida Senior Living, Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 75-2678809    
Entity Address, Address Line One 14755 Preston Road    
Entity Address, Address Line Two Suite 810    
Entity Address, City or Town Dallas    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 75254    
City Area Code 972    
Local Phone Number 770-5600    
Title of 12(b) Security Common Stock, $0.01 par value per share    
Trading Symbol SNDA    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction false    
Entity Shell Company false    
Entity Public Float     $ 155.9
Entity Common Stock, Shares Outstanding (in shares)   47,388,042  
Documents Incorporated by Reference
Portions of the Registrant’s definitive proxy statement pertaining to its 2026 Annual Meeting of Stockholders and filed or to be filed not later than 120 days after the end of the fiscal year pursuant to Regulation 14A are incorporated herein by reference into Part III of this report.
    
Amendment Flag false    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001043000