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Fair Value Measurements - Debt Securities, Available-for-sale Measured at Fair Value (Details) (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fair value of mortgage and other indebtedness $ 1,806,486 $ 1,833,992
Available-for-sale securities, amortized cost 261,869 293,476
Available-For-Sale Securities Held, Fair Value [1] 262,142 292,422
U.S Treasury Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Available-for-sale securities, amortized cost 261,869 293,476
Available-For-Sale Securities Held, unrealized gains/(losses) 273 (1,054)
Available-For-Sale Securities Held, Fair Value $ 262,142 $ 292,422
U.S. Treasury securities, maturity date Jul. 31, 2024  
[1] As of December 31, 2023, includes $187,221 of assets related to consolidated variable interest entities that can be used only to settle obligations of the consolidated variable interest entities and $209,637 of liabilities of consolidated variable interest entities for which creditors do not have recourse to the general credit of the Company. See Note 10.