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Fair Value of Assets and Liabilities - Assets and Liabilities (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 USD ($) property | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Jun. 30, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Impairment of assets | $ 70,734 | $ 18,380 | $ 0 |
Number of properties owned (property) | property | 367 |  |  |
Held for sale |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Number of properties owned (property) | property | 32 |  |  |
Life Sciences Property |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Impairment of assets | $ 29,016 |  |  |
Corporate Joint Venture |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Number of properties owned (property) | property | 11 |  |  |
Non-Recurring Fair Value Measurements Assets | Life Sciences Property |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Aggregate sales price | $ 24,074 |  |  |
Non-Recurring Fair Value Measurements Assets | Life Sciences Property | Held for sale |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Number of properties owned (property) | property | 2 |  |  |
Level 2 | Carrying Value | Non-Recurring Fair Value Measurements Assets |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Real estate properties held for sale | $ 24,074 | 0 |  |
Level 2 | Estimated Fair Value | Non-Recurring Fair Value Measurements Assets |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Real estate properties held for sale | $ 24,074 | 0 |  |
Seaport Innovation LLC | Corporate Joint Venture |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Equity method investment ownership percentage | 10.00% |  |  | 20.00%
Holding period | 10 years |  |  |
Number of properties owned (property) | property | 1 |  |  |
Seaport Innovation LLC | Corporate Joint Venture | Discount Rate |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Measurement input | 0.0700 |  |  |
Seaport Innovation LLC | Corporate Joint Venture | Market Capitalization Rate |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Measurement input | 0.0600 |  |  |
Seaport Innovation LLC | Level 3 | Carrying Value | Recurring Fair Value Measurements Assets | Joint Venture |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Investments in affiliates, fair value | $ 81,949 | 85,699 |  |
Seaport Innovation LLC | Level 3 | Estimated Fair Value | Recurring Fair Value Measurements Assets | Joint Venture |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Investments in affiliates, fair value | $ 81,949 | 85,699 |  |
The LSMD Fund REIT LLC | Corporate Joint Venture |  |  |  |
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 owned (property) | property | 10 |  |  |
The LSMD Fund REIT LLC | Corporate Joint Venture | Discount Rate | Minimum |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Measurement input | 0.0625 |  |  |
The LSMD Fund REIT LLC | Corporate Joint Venture | Discount Rate | Maximum |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Measurement input | 0.0775 |  |  |
The LSMD Fund REIT LLC | Corporate Joint Venture | Market Capitalization Rate | Minimum |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Measurement input | 0.0500 |  |  |
The LSMD Fund REIT LLC | Corporate Joint Venture | Market Capitalization Rate | Maximum |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Measurement input | 0.0700 |  |  |
The LSMD Fund REIT LLC | Level 3 | Carrying Value | Recurring Fair Value Measurements Assets | Joint Venture |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Investments in affiliates, fair value | $ 44,910 | 44,217 |  |
The LSMD Fund REIT LLC | Level 3 | Estimated Fair Value | Recurring Fair Value Measurements Assets | Joint Venture |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Investments in affiliates, fair value | $ 44,910 | $ 44,217 |  |

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