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Description of Business - Narrative (Details) - community |  | 12 Months Ended
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Jul. 01, 2021 | Dec. 31, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Number of communities leased |  | 295
Current Property Ownership Status |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Number of senior living communities |  | 673
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Number of senior living communities |  | 673
Number of communities owned |  | 346
Number of communities leased |  | 295
Number of communities managed by third party |  | 32
Securities Purchase Agreement | HCA Healthcare, Inc. | Health Care Services |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Percentage of ownership sold in transaction | 80.00% |
Percentage of ownership after transaction | 20.00% | 20.00%

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