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Revenue - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jul. 01, 2021
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Disaggregation of Revenue [Line Items]            
Monthly resident fees   $ 30.9   $ 30.9   $ 27.5
Revenue recognized       $ 48.6 $ 46.2  
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% 81.00% 93.50% 81.20%  
Government reimbursement | Revenue Benchmark | Customer Concentration Risk            
Disaggregation of Revenue [Line Items]            
Concentration risk, percentage   5.10% 14.60% 5.10% 14.60%  
Other third-party payor programs | Revenue Benchmark | Customer Concentration Risk            
Disaggregation of Revenue [Line Items]            
Concentration risk, percentage   1.30% 4.40% 1.40% 4.20%  
Deferred Revenue and Credits            
Disaggregation of Revenue [Line Items]            
Contract with customer, liability   $ 71.8   $ 71.8   $ 67.5