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Revenue - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jul. 01, 2021
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Disaggregation of Revenue [Line Items]            
Monthly resident fees   $ 31.9   $ 31.9   $ 27.5
Revenue recognized       $ 53.1 $ 56.2  
Securities Purchase Agreement | HCA Healthcare, Inc. | Health Care Services            
Disaggregation of Revenue [Line Items]            
Sale of stock, percentage of ownership sold in transaction (as a percent) 80.00%          
Private pay | Revenue Benchmark | Customer Concentration Risk            
Disaggregation of Revenue [Line Items]            
Concentration risk, percentage   93.60% 93.00% 93.50% 84.90%  
Government reimbursement | Revenue Benchmark | Customer Concentration Risk            
Disaggregation of Revenue [Line Items]            
Concentration risk, percentage   5.10% 5.50% 5.10% 11.80%  
Other third-party payor programs | Revenue Benchmark | Customer Concentration Risk            
Disaggregation of Revenue [Line Items]            
Concentration risk, percentage   1.30% 1.50% 1.40% 3.30%  
Deferred Revenue and Credits            
Disaggregation of Revenue [Line Items]            
Contract with customer, liability   $ 74.9   $ 74.9   $ 67.5