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Financial Instruments and Fair Value Measurements - Schedule of Carrying Values Different from Estimated Fair Values (Detail) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Mortgage Indebtedness $ 248,702 $ 301,373
Fair Value [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Mortgage Indebtedness $ 254,808 $ 309,228