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Real Estate Investments - Narrative (Details) $ in Thousands |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Feb. 24, 2025 USD ($) property | Feb. 25, 2025 USD ($) property | Jan. 31, 2025 USD ($) property | Jun. 30, 2022 USD ($) | Jan. 31, 2022 USD ($) investor | Dec. 31, 2024 USD ($) property | Dec. 31, 2023 USD ($) property | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Real Estate |  |  |  |  |  |  |  |  |
Impairment of assets |  |  |  |  |  | $ 70,734 | $ 18,380 | $ 0 |
Number of properties owned (property) | property |  |  |  |  |  | 367 |  |  |
Redemption of senior notes |  |  |  |  |  | $ 120,000 | 250,000 | 500,000 |
Hurricane damage, loss and deductible amount |  |  |  |  |  |  |  | 11,253 |
Hurricane damage, loss |  |  |  |  |  |  |  | 7,635 |
Proceeds from insurance recoveries |  |  |  |  |  | 1,698 | 534 | 14,466 |
Hurricane damage, loss recovered |  |  |  |  |  |  |  | 7,635 |
Hurricane damage, deductible amount |  |  |  |  |  |  |  | 3,618 |
Hurricane damage, insurance proceeds in excess of loss, liability |  |  |  |  |  | 1,698 | 534 | 3,213 |
Proceeds from sale of interest in joint venture, net |  |  |  | $ 108,424 |  | 0 | 0 | 108,424 |
(Loss) gain on sale of properties |  |  |  |  |  | (18,938) | 1,205 | 321,862 |
Equity in net earnings (losses) of investees |  |  |  |  |  | 1,597 | (20,461) | 6,055 |
Equity method investment |  |  |  |  |  | 24,590 | 0 |  |
Senior Secured Note Due 2026 |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Aggregate principal amount of mortgage debt |  |  |  |  |  | 940,534 |  |  |
AlerisLife Inc |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Equity method investment, difference between carrying amount and underlying equity |  |  |  |  |  | $ 29,500 |  |  |
Seaport Innovation LLC |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Aggregate property valuation amount |  |  |  |  |  |  |  |  | $ 1,700,000
Aggregate principal amount of mortgage debt |  |  |  |  |  |  |  |  | $ 620,000
Corporate Joint Venture |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Number of properties owned (property) | property |  |  |  |  |  | 11 |  |  |
Aggregate property valuation amount |  |  |  |  | $ 702,500 |  |  |  |
Aggregate principal amount of mortgage debt |  |  |  |  | 456,600 |  |  |  |
Equity in net earnings (losses) of investees |  |  |  |  |  | $ (7,550) | $ (20,461) | 6,055 |
Corporate Joint Venture | Seaport Innovation LLC |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Aggregate principal amount of mortgage debt |  |  |  |  |  | $ 620 |  |  |
Seaport Innovation LLC | Corporate Joint Venture |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Proceeds from sale of interest in joint venture, net |  |  |  | $ 108 |  |  |  |  |
Seaport Innovation LLC | Corporate Joint Venture |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Number of properties owned (property) | property |  |  |  |  |  | 1 |  |  |
Equity method investment ownership percentage |  |  |  | 20.00% |  | 10.00% |  |  |
Additional equity joint venture percentage |  |  |  | 10.00% |  |  |  |  |
AlerisLife Inc |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Equity method investment ownership percentage |  |  |  |  |  | 34.00% |  |  |
Equity in net earnings (losses) of investees |  |  |  |  |  | $ 7,919 |  |  |
AlerisLife Inc | Equity Method Investments |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Amortization |  |  |  |  |  | $ 1,228 |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Number of properties owned (property) | property |  |  |  |  |  | 5 | 8 |  |
Sales price |  |  |  |  |  | $ 35,675 | $ 18,880 |  |
Held for sale |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Number of properties owned (property) | property |  |  |  |  |  | 32 |  |  |
Number of real estate properties under agreement | property |  |  |  |  |  | 26 |  |  |
Held for sale | Subsequent Event |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Sales price | $ 219,580 |  |  |  |  |  |  |  |
Number of real estate properties under agreement | property | 26 |  |  |  |  |  |  |  |
Held for sale | Subsequent Event | Senior Secured Note Due 2026 |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Number of real estate properties under agreement | property | 19 |  |  |  |  |  |  |  |
Redemption of senior notes | $ 142,100 |  |  |  |  |  |  |  |
Medical Office Building and Life Science Building |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Impairment of assets |  |  |  |  |  | $ 70,734 | $ 14,034 |  |
Number of properties impaired | property |  |  |  |  |  | 6 | 4 |  |
Number of properties owned (property) | property |  |  |  |  |  | 98 |  |  |
Medical Office Building and Life Science Building | Corporate Joint Venture |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Proceeds from sale of interest in joint venture, net |  |  |  |  | $ 653,300 |  |  |  |
Number of third party institutional investors | investor |  |  |  |  | 2 |  |  |  |
Medical Office Building and Life Science Building | Diversified Healthcare Trusts | Corporate Joint Venture |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Equity method investment ownership percentage |  |  |  |  | 20.00% |  |  |  |
Medical Office Building and Life Science Building | Diversified Healthcare Trusts | Corporate Joint Venture | Unrelated Investor One |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Equity method investment ownership percentage |  |  |  |  | 41.00% |  |  |  |
Medical Office Building and Life Science Building | Diversified Healthcare Trusts | Corporate Joint Venture | Unrelated Investor Two |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Equity method investment ownership percentage |  |  |  |  | 39.00% |  |  |  |
Medical Office Building and Life Science Building | Seaport Innovation LLC | Corporate Joint Venture |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Equity method investment ownership percentage |  |  |  | 10.00% |  |  |  |  |
Medical Office Building and Life Science Building | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Number of properties impaired | property |  |  |  |  |  | 3 |  |  |
Number of properties owned (property) | property |  |  |  |  |  |  | 3 |  |
Medical Office Building and Life Science Building | Held for sale |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Number of properties owned (property) | property |  |  |  |  |  | 3 | 1 |  |
Senior Living Communities |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Impairment of assets |  |  |  |  |  |  | $ 4,346 |  |
Number of properties impaired | property |  |  |  |  |  |  | 2 |  |
Senior Living Communities | Skilled Nursing Bed License |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
(Loss) gain on sale of properties |  |  |  |  | $ 322,468 |  |  | $ (1,428) |
Senior Living Communities | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Number of properties owned (property) | property |  |  |  |  |  |  | 1 |  |
Senior Living Communities | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Subsequent Event |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Number of properties owned (property) | property |  | 1 |  |  |  |  |  |  |
Sales price |  | $ 2,900 |  |  |  |  |  |  |
Skilled Nursing Bed Licenses |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Gain on transaction |  |  |  |  |  |  | $ 940 |  |
Life Science Property, Debt Redemption | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Subsequent Event |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Number of properties owned (property) | property |  |  | 3 |  |  |  |  |  |
Sales price |  |  | $ 159,025 |  |  |  |  |  |
Life Sciences Property And Senior Living Communities, Debt Redemption | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Subsequent Event | Senior Secured Note Due 2026 |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Number of properties owned (property) | property |  |  | 3 |  |  |  |  |  |
Sales price |  |  | $ 159,025 |  |  |  |  |  |
Life Sciences Property And Senior Living Communities, Debt Redemption | Held for sale |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Number of properties owned (property) | property |  |  |  |  |  | 3 |  |  |
Life Science | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Subsequent Event |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |
Number of properties owned (property) | property |  |  | 1 |  |  |  |  |  |
Sales price |  |  | $ 16,800 |  |  |  |  |  |

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