Represents the number of shares held as a percentage of the total shares outstanding at the end of the period.

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- Definition

Investment Owned Balance Per Shares

+ References

No definition available.

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- Definition

Investment Sale, Percentage Of Investee Equity Eligible For Sale

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- Definition

Related Party, Management Agreements

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- Definition

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- Definition

Balance held at close of period in number of shares.

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- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Related Person Transactions (Details) $ / shares in Units, $ in Thousands		3 Months Ended
	Feb. 02, 2023 $ / shares shares	Mar. 31, 2023 USD ($) agreement	Mar. 31, 2022 USD ($)	Mar. 20, 2023 shares
Related person transactions
Revenues		$ 346,030	$ 310,733
AlerisLife Inc
Related person transactions
Investment owned balance per shares \| $ / shares	$ 1.31
Investment Sale, Percentage Of Investee Equity Eligible For Sale	31.90%
Rental income
Related person transactions
Revenues		66,438	65,285
Reit Management And Research L L C \| Rental income
Related person transactions
Revenues		61	$ 70
AlerisLife Inc
Related person transactions
Equity securities investment (in shares) \| shares	10,691,658			10,691,658
AlerisLife Inc
Related person transactions
Investment owned, percentage of total shares outstanding				31.90%
RMR
Related person transactions
Related party transaction, closing cost		$ 8,612
Number of management agreements \| agreement		2
AlerisLife Inc \| AlerisLife Inc
Related person transactions
Noncontrolling interest, ownership percentage by parent				6.10%