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Description of Business - Narrative (Details)		12 Months Ended
	Jul. 01, 2021	Dec. 31, 2021 community segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of senior living communities		679
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of communities leased		299
Number of reportable segments | segment		3
Current Property Ownership Status
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of communities owned		347
Number of communities leased		299
Number of communities managed by third party		33
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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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8672-108599

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