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Revenue - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Jul. 01, 2021
Dec. 31, 2023
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disaggregation of Revenue [Line Items]          
Monthly resident fees   $ 24.1 $ 24.1 $ 25.2  
Revenue recognized     50.2 54.5 $ 60.2
Deferred Revenue and Credits          
Disaggregation of Revenue [Line Items]          
Deferred revenue   $ 48.3 $ 48.3 $ 67.3  
Government reimbursement | Revenue Benchmark | Customer Concentration Risk          
Disaggregation of Revenue [Line Items]          
Revenue (as percent)     4.80% 5.10% 10.30%
CCRCs | Government reimbursement | Revenue Benchmark | Customer Concentration Risk          
Disaggregation of Revenue [Line Items]          
Revenue (as percent)     16.90% 18.00% 18.80%
HCA Healthcare, Inc. | Health Care Services          
Disaggregation of Revenue [Line Items]          
Percentage of ownership sold in transaction 80.00% 20.00%