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Fair Value Measurements - Debt Securities, Available-for-sale Measured at Fair Value (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Fair value of mortgage and other indebtedness |  | $ 1,754,060 | $ 1,806,486
Available-for-sale securities, amortized cost |  | 235,072 | 261,869
Available-For-Sale Securities Held, Fair Value | [1] | 234,998 | 262,142
U.S Treasury Securities |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Available-for-sale securities, amortized cost |  | 235,072 | 261,869
Available-For-Sale Securities Held, unrealized (loss) gain |  | (74) | 273
Available-For-Sale Securities Held, Fair Value |  | $ 234,998 | $ 262,142
U.S. Treasury securities, maturity date |  | Sep. 30, 2024 |
[1] | As of March 31, 2024, includes $179,986 of assets related to consolidated variable interest entities that can be used only to settle obligations of the consolidated variable interest entities and $205,856 of liabilities of consolidated variable interest entities for which creditors do not have recourse to the general credit of the Company. See Note 7.

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