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Revenue - Additional Information (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Jul. 01, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disaggregation of Revenue [Line Items] |  |  |  |
Monthly resident fees |  | $ 25.2 | $ 27.5 |
Revenue recognized |  | $ 54.5 | $ 60.2 | $ 60.6
Government reimbursement | Revenue Benchmark | Customer Concentration Risk |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue |  | 5.10% | 10.30% | 14.50%
CCRCs | Government reimbursement | Revenue Benchmark | Customer Concentration Risk |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue |  | 18.00% | 18.80% | 18.50%
Securities Purchase Agreement | HCA Healthcare, Inc. | Health Care Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Percentage of ownership sold in transaction | 80.00% |  |  |
Deferred Revenue and Credits |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Deferred revenue |  | $ 67.3 | $ 67.5 |

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