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Fair Value of Assets and Liabilities - Assets and Liabilities (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($) property	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) property	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impairment of assets | $	$ 6,545	$ 11,299	$ 18,687	$ 17,224
Number of Properties | property	370		370
Held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Number of Properties | property	5		5
Medical Office
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impairment of assets | $			$ 18,789
Number of Properties | property	3		3
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	0.0750		0.0750
Corporate Joint Venture | Seaport Innovation LLC | Market 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	0.0650		0.0650
Corporate Joint Venture | The LSMD Fund REIT LLC | Discount Rate | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Measurement input	0.0800		0.0800
Corporate Joint Venture | The LSMD Fund REIT LLC | Market 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 | Market Capitalization Rate | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Measurement input	0.0700		0.0700
Medical Office
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impairment of assets | $	$ 6,647
Recurring Fair Value Measurements Assets | Level 3 | Joint Venture | Carrying Value | Seaport Innovation LLC
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments in affiliates, fair value | $	64,223		$ 64,223		$ 85,699
Recurring Fair Value Measurements Assets | Level 3 | Joint Venture | Carrying Value | The LSMD Fund REIT LLC
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments in affiliates, fair value | $	44,583		44,583		44,217
Non-Recurring Fair Value Measurements Assets | Medical Office
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Aggregate sales price | $	$ 5,859		$ 5,859
Non-Recurring Fair Value Measurements Assets | Medical Office | Held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Number of Properties | property	1		1
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 | $	$ 5,859		$ 5,859		$ 0

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