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Cover Page - shares
 6 Months Ended
Jun. 30, 2025
Aug. 07, 2025
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
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 Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding (in shares)   18,823,108
Amendment Flag false  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2  
Entity Central Index Key 0001043000  
Current Fiscal Year End Date --12-31