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Investment Activity (Assets Held for Sale and Long-Lived Assets) (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 USD ($) property | Dec. 31, 2023 USD ($) property | Dec. 31, 2022 USD ($)
Real Estate [Line Items] |  |  |
Number of properties | property |  | 1 |
Rental income | $ 257,049 | $ 249,227 | $ 217,700
Impairment of property | 0 | $ 1,173 | 21,531
Real estate properties, impaired, sold or classified as held for sale | property |  | 4 |
Real estate assets held for development and sale |  | $ 1,600 |
Real Estate Investments |  |  |
Real Estate [Line Items] |  |  |
Impairment of property | $ 700 | $ 1,600 | 51,600
Real estate properties, impaired, sold or classified as held for sale | property | 1 | 3 |
Real estate assets held for development and sale |  | $ 500 |
Senior Living Campuses | Disposal Group, Held-for-sale, Not Discontinued Operations | Two Thousand Twenty Four Disposal Group |  |  |
Real Estate [Line Items] |  |  |
Disposal group, including discontinued operation, consideration | $ 38,500 |  |
Lease income, annual rent | 2,800 |  |
Disposal group, including discontinued operation, assets | 19,100 |  |
Asset Held For Sale In 2022 |  |  |
Real Estate [Line Items] |  |  |
Rental income | $ 900 | $ 1,700 | $ 900

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