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Fair Value of Assets and Liabilities - Assets and Liabilities (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($) property	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impairment of assets | $	$ 12,142	$ 5,925
Number of Properties	371
Held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Number of Properties	4
Medical Office
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impairment of assets | $	$ 12,142
Number of Properties	2
Corporate Joint Venture
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Number of Properties	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%
Holding period	10 years
Number of Properties	1
Corporate Joint Venture | Seaport Innovation LLC | Discount Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Measurement input	0.0800
Corporate Joint Venture | Seaport Innovation LLC | Market Capitalization Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Measurement input	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%
Holding period	10 years
Number of Properties	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
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
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	0.0475
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
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 | $	$ 85,922		$ 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 | $	44,377		44,217
Non-Recurring Fair Value Measurements Assets | Medical Office
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Aggregate sales price | $	$ 19,744
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	2
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 | $	$ 19,744		$ 0

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