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Related Person Transactions (Details) $ in Thousands	1 Months Ended		9 Months Ended
	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2022 USD ($) investor property agreement jointVenture_arrangement	Jun. 28, 2022	Dec. 30, 2021	Mar. 31, 2017
AlerisLife Inc
Related person transactions
Investment owned, percentage of total shares outstanding			32.80%
RMR
Related person transactions
Number joint venture arrangements | jointVenture_arrangement			2
Number of third party institutional investors | investor			2
Number of medical office and life science properties | property			10
Related party transaction, closing cost | $			$ 9,558
Number of management agreements | agreement			2
Corporate Joint Venture | Seaport Innovation LLC
Related person transactions
Additional equity joint venture percentage	10.00%	35.00%
Equity method investment ownership percentage		20.00%	10.00%	20.00%	55.00%	55.00%
AlerisLife Inc | AlerisLife Inc
Related person transactions
Noncontrolling interest, ownership percentage by parent			6.20%

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

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