v3.26.1
Related Person Transactions (Details)
$ in Thousands
3 Months Ended
Jan. 09, 2026
USD ($)
Jul. 15, 2025
USD ($)
Feb. 14, 2025
USD ($)
Mar. 31, 2026
USD ($)
agreement
Mar. 31, 2025
USD ($)
Related person transactions          
Equity method investment distributions       $ 27,200 $ 17,000
Total residents fees and services       $ 366,471 386,864
AlerisLife Inc          
Related person transactions          
Equity method investment ownership percentage       34.00%  
Equity method investment distributions $ 27,200 $ 3,400 $ 17,000    
Rental income          
Related person transactions          
Total residents fees and services       $ 49,246 58,558
RMR LLC | Rental income          
Related person transactions          
Total residents fees and services       108 $ 107
RMR LLC | Related Party          
Related person transactions          
Related party transaction, closing cost       $ 3,965  
Number of management agreements | agreement       2  
ABP Trust | AlerisLife Inc          
Related person transactions          
Equity method investment ownership percentage       66.00%  
AlerisLife Inc          
Related person transactions          
Payments of dividends $ 80,000 $ 10,000 $ 50,000    
Diversified Healthcare Trust | ABP Trust And Adam D. Portnoy          
Related person transactions          
Noncontrolling interest, ownership percentage by parent       9.80%