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Senior Living Community Management Agreements - Narrative (Details) $ in Thousands		3 Months Ended
	Jun. 09, 2021 USD ($) unit community	Mar. 31, 2022 USD ($) community property unit	Mar. 31, 2021 USD ($) community
Number of properties (property) | property		378
Affiliated Entity
Lease income		$ 388	$ 397
Third Party Investor | Five Star
Property management agreement expense		5,108
Five Star
Property management agreement expense		8,932	13,850
Related party transaction capitalized amount		790	834
Five Star | Operating Expense
Property management agreement expense		$ 8,142	13,016
Five Star | Senior Living Communities
Number of properties (property) | community	120
Related party transactions, termination percentage	10.00%
Percentage target EBITDA of new management agreement not earned	80.00%
Five Star | Senior Living Communities | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations
Number of property units (units) | unit	7,500	7,340
Amounts of transaction	$ 682,000	$ 928
Number of properties transitioned | community		107
Five Star | Senior Living Communities | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations | Scenario, Plan
Number of properties (property) | community	108
Five Star | Senior Living Communities | Closed
Number of properties (property) | community		108
Number of property units (units) | unit	1,500
Five Star | Rehabilitation Services
Expenses from transactions with related party		$ 1,916	$ 5,441
Affiliated Entity | Senior Living Communities | Five Star
Number of communities managed | community		120	235

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