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Fair Value of Assets and Liabilities - Assets and Liabilities (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($) property	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) property	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impairment of assets	$ 93,243	$ 23,031	$ 162,708	$ 41,718
Number of Properties | property	335		335
Held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Number of Properties | property	50		50
Medical Office
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impairment of assets	$ 57,331
Aggregate sales price	$ 82,288		$ 82,288
Medical Office | Held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Number of Properties | property	12		12
Senior Living Communities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impairment of assets	$ 35,912
Aggregate sales price	$ 47,634		$ 47,634
Senior Living Communities | Held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Number of Properties | property	24		24
Corporate Joint Venture
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Number of Properties | property	11		11
Corporate Joint Venture | Seaport Innovation LLC
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Equity method investment ownership percentage	10.00%		10.00%
Holding period			10 years
Number of Properties | property	1		1
Corporate Joint Venture | Seaport Innovation LLC | Discount Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Measurement input	0.0700		0.0700
Corporate Joint Venture | Seaport Innovation LLC | Exit Capitalization Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Measurement input	0.0600		0.0600
Corporate Joint Venture | The LSMD Fund REIT LLC
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Equity method investment ownership percentage	20.00%		20.00%
Holding period			10 years
Number of Properties | property	10		10
Corporate Joint Venture | The LSMD Fund REIT LLC | Discount Rate | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Measurement input	0.0625		0.0625
Corporate Joint Venture | The LSMD Fund REIT LLC | Discount Rate | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Measurement input	0.0875		0.0875
Corporate Joint Venture | The LSMD Fund REIT LLC | Exit Capitalization Rate | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Measurement input	0.0525		0.0525
Corporate Joint Venture | The LSMD Fund REIT LLC | Exit Capitalization Rate | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Measurement input	0.0800		0.0800
Recurring Fair Value Measurements Assets | Level 3 | Carrying Value | Joint Venture | Seaport Innovation LLC
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments in affiliates, fair value	$ 67,060		$ 67,060		$ 81,949
Recurring Fair Value Measurements Assets | Level 3 | Carrying Value | Joint Venture | The LSMD Fund REIT LLC
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments in affiliates, fair value	45,709		45,709		44,910
Recurring Fair Value Measurements Assets | Level 2 | Carrying Value | Interest Rate Cap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivative asset	1		1		0
Non-Recurring Fair Value Measurements Assets | Level 2 | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Real estate properties held for sale	$ 129,922		$ 129,922		$ 0

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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
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-Paragraph 2
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
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-Section 50
-Paragraph 2E
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-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E

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