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Mortgages Payable - Schedule of Long-term Debt Instruments (Detail) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2023 | Dec. 31, 2022
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Notes payable | $ 1,091,787 | $ 1,091,051
Mortgages |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Mortgage payable gross | 1,096,544 | 1,096,544
Deferred debt issuance costs, net of accumulated amortization of $16,842 and $16,071, respectively | (4,757) | (5,493)
Notes payable | 1,091,787 | 1,091,051
Deferred debt issuance costs, accumulated amortization | $ 16,842 | 16,071
Mortgages | LIBOR |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Interest cap rate | 6.00% |
Mortgages | Prime Rate |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Interest rate | 8.25% |
Mortgages | 731 Lexington Avenue | Office Space |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Interest rate (in percentage) | 6.09% |
Mortgage payable gross | $ 500,000 | 500,000
Mortgages | 731 Lexington Avenue | Office Space | LIBOR |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Basis spread over LIBOR or SOFR | 0.90% |
Mortgages | 731 Lexington Avenue | Office Space | LIBOR | Maximum |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Interest cap rate | 6.00% |
Mortgages | 731 Lexington Avenue | Office Space | Prime Rate |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Interest rate | 6.00% |
Mortgages | 731 Lexington Avenue | Retail Space |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Interest rate (in percentage) | 1.76% |
Mortgage payable gross | $ 300,000 | 300,000
Mortgages | 731 Lexington Avenue | Retail Space | Secured Overnight Financing Rate (SOFR) |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Basis spread over LIBOR or SOFR | 1.51% |
Mortgages | Rego Park II | Retail Space |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Interest rate (in percentage) | 5.60% |
Mortgage payable gross | $ 202,544 | 202,544
Mortgages | Rego Park II | Retail Space | Secured Overnight Financing Rate (SOFR) |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Basis spread over LIBOR or SOFR | 1.45% |
Mortgages | Rego Park II | Retail Space | Secured Overnight Financing Rate (SOFR) | Maximum |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Interest cap rate | 4.15% |
Mortgages | Alexander Apartment Tower | Apartment Building |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Interest rate (in percentage) | 2.63% |
Mortgage payable gross | $ 94,000 | $ 94,000

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