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Leases and Management Agreements with Five Star - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue
Revenue	$ 1,383,212	$ 1,632,026	$ 1,040,155
Senior Living Communities
Disaggregation of Revenue
Revenue	974,623	1,204,811	433,597
Residents fees and services
Disaggregation of Revenue
Revenue	974,623	1,204,811	433,597
Residents fees and services | Basic housing and support services | Senior Living Communities
Disaggregation of Revenue
Revenue	750,644	856,687	353,699
Residents fees and services | Medicare and Medicaid programs | Senior Living Communities
Disaggregation of Revenue
Revenue	98,273	173,878	31,324
Residents fees and services | Private pay and other third party payer SNF services | Senior Living Communities
Disaggregation of Revenue
Revenue	$ 125,706	$ 174,246	$ 48,574

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