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Real Estate Investments - Narrative (Details) $ in Thousands | 1 Months Ended | 3 Months Ended |  |
--- | --- | --- | --- | ---
Feb. 28, 2023 USD ($) property | Jun. 30, 2022 USD ($) | Jan. 31, 2022 USD ($) property investor | Dec. 31, 2021 USD ($) | Mar. 31, 2023 USD ($) ft² property state jointVenture | Mar. 31, 2022 USD ($) | Jun. 28, 2022 | Dec. 30, 2021
Real Estate |  |  |  |  |  |  |  |
Number of properties (property) | property |  |  |  |  | 376 |  |  |
Number of states in which properties are located | state |  |  |  |  | 36 |  |  |
Number of states | state |  |  |  |  | 5 |  |  |
Impairment of assets |  |  |  |  | $ 5,925 | $ 0 |  |
Seaport Innovation LLC |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |
Real estate property fair value |  |  |  | $ 1,700,000 |  |  |  |
Aggregate principal amount of mortgage debt |  |  |  | $ 620,000 |  |  |  |
Senior Living Communities |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |
Number of properties (property) | property |  |  |  |  | 1 |  |  |
Impairment of assets |  |  |  |  | $ 3,617 |  |  |
Senior Living Communities | Pennsylvania and South Carolina | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |
Number of properties (property) | property | 3 |  |  |  | 3 |  |  |
Sales price | $ 2,800 |  |  |  | $ 2,800 |  |  |
Senior Living Communities | Skilled nursing bed license |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |
Gain on sale of properties |  |  | $ 327,542 |  |  |  |  |
Medical Office Property |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |
Number of properties (property) | property |  |  |  |  | 1 |  |  |
Impairment of assets |  |  |  |  | $ 2,308 |  |  |
Skilled Nursing Bed Licenses |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |
Gain on sale of properties |  |  |  |  | $ 940 |  |  |
Corporate Joint Venture |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |
Number of properties (property) | property |  |  |  |  | 11 |  |  |
Area of real estate properties (in square feet) | ft² |  |  |  |  | 2,203,242 |  |  |
Real estate property fair value |  |  | 702,500 |  |  |  |  |
Aggregate principal amount of mortgage debt |  |  | 456,600 |  |  |  |  |
Corporate Joint Venture | Medical Office Building and Life Science Building |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |
Proceeds from sale of interest in joint venture, net |  |  | $ 653,300 |  |  |  |  |
Number of third party institutional investors | investor |  |  | 2 |  |  |  |  |
Number of properties included in joint venture agreement | property |  |  | 10 |  |  |  |  |
Corporate Joint Venture | Seaport Innovation LLC |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |
Number of properties (property) | property |  |  |  |  | 1 |  |  |
Area of real estate properties (in square feet) | ft² |  |  |  |  | 1,134,479 |  |  |
Additional equity joint venture percentage |  | 10.00% |  | 35.00% |  |  |  |
Equity method investment ownership percentage |  |  |  |  | 10.00% |  | 20.00% | 55.00%
Proceeds from sale of interest in joint venture, net |  | $ 108,000 |  | $ 378,000 |  |  |  |
Corporate Joint Venture | Seaport Innovation LLC | Medical Office Building and Life Science Building |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |
Equity method investment ownership percentage |  | 10.00% |  |  |  |  |  |
Corporate Joint Venture | Diversified Healthcare Trusts | Medical Office Building and Life Science Building |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |
Equity method investment ownership percentage |  |  | 20.00% |  |  |  |  |
Corporate Joint Venture | Diversified Healthcare Trusts | Medical Office Building and Life Science Building | Unrelated Investor One |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |
Equity method investment ownership percentage |  |  | 41.00% |  |  |  |  |
Corporate Joint Venture | Diversified Healthcare Trusts | Medical Office Building and Life Science Building | Unrelated Investor Two |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |
Equity method investment ownership percentage |  |  | 39.00% |  |  |  |  |
Joint Venture |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |
Number of unconsolidated joint ventures | jointVenture |  |  |  |  | 2 |  |  |

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