Senior Living Community Management Agreements - Narrative (Details) $ in Thousands	3 Months Ended
Mar. 31, 2023 USD ($) community property	Mar. 31, 2022 USD ($) community	Dec. 31, 2021 community unit
Number of properties (property) \| property	376
Five Star
Property management agreement expense	$ 10,014	$ 8,932
Related party transaction capitalized amount	877	790
Five Star \| Rehabilitation Services
Expenses from transactions with related party	879	1,916
Five Star \| Operating Expense
Property management agreement expense	9,137	$ 8,142
Senior Living Communities \| Third Party Investor
Number of communities managed \| community		107
Property management agreement expense	$ 5,238	$ 5,108
Senior Living Communities \| Five Star \| Closed
Number of properties (property) \| community			108
Senior Living Communities \| Five Star \| Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations
Number of property units (units) \| unit			7,340
Number of properties transitioned \| community	111		107
Amounts of transaction		$ 928
Senior Living Communities \| Affiliated Entity \| Five Star
Number of communities managed \| community	119	120

Represents the number of communities managed by a related party.

No definition available.

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- Definition

Number Of Real Estate Properties Transitioned

+ References

No definition available.

+ Details

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- Definition

Related Party Transaction Capitalized Amount

+ References

No definition available.

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- Definition

Expenses recognized during the period resulting from property management transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party during the period.

+ References

No definition available.

+ Details

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- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

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- Definition

The number of units in a real estate property owned as of the balance sheet date.

+ References

No definition available.

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- Definition

Amount of transactions with related party during the financial reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

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-Section 50
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864

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- Definition

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

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