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Revenue (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Disaggregation of Revenue [Line Items]          
Monthly resident fees $ 31.6   $ 31.6   $ 25.2
Revenue recognized     49.1 $ 53.1  
Deferred Revenue and Credits          
Disaggregation of Revenue [Line Items]          
Contract with customer, liability $ 57.9   $ 57.9   $ 67.3
Private pay | Revenue Benchmark | Customer Concentration Risk          
Disaggregation of Revenue [Line Items]          
Concentration risk, percentage 93.70% 93.60% 93.70% 93.50%  
Government reimbursement | Revenue Benchmark | Customer Concentration Risk          
Disaggregation of Revenue [Line Items]          
Concentration risk, percentage 4.90% 5.10% 4.90% 5.10%  
Other third-party payor programs | Revenue Benchmark | Customer Concentration Risk          
Disaggregation of Revenue [Line Items]          
Concentration risk, percentage 1.40% 1.30% 1.40% 1.40%