Investment in Unconsolidated Joint Venture (Detail) - Liquidation Value [Member] - Worldwide Plaza [Member]	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Cravath, Swaine & Moore LLP [Member]
Revenue, Major Customer [Line Items]
Percentage of total annualized rental income	48.10%	50.50%
Nomura Holdings America, Inc [Member]
Revenue, Major Customer [Line Items]
Percentage of total annualized rental income	29.40%	28.80%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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