Quarterly report [Sections 13 or 15(d)]

INVESTMENTS IN UNCONSOLIDATED JOINT VENTURES - Schedule of Company's Equity In Earnings (Loss) of Unconsolidated Joint Ventures (Details)

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INVESTMENTS IN UNCONSOLIDATED JOINT VENTURES - Schedule of Company's Equity In Earnings (Loss) of Unconsolidated Joint Ventures (Details) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended
Apr. 30, 2025
Jan. 31, 2025
Jan. 31, 2024
Mar. 31, 2025
Mar. 31, 2024
Schedule of Equity Method Investments [Line Items]          
Equity in earnings (losses) of unconsolidated joint ventures       $ 3,842 $ 254
Amortization of basis difference       154 154
Multifamily | Metropolitan and Lofts at 40 Park          
Schedule of Equity Method Investments [Line Items]          
Equity in earnings (losses) of unconsolidated joint ventures       (249) (427)
Multifamily | RiverTrace at Port Imperial          
Schedule of Equity Method Investments [Line Items]          
Equity in earnings (losses) of unconsolidated joint ventures       160 159
Multifamily | The Capstone at Port Imperial          
Schedule of Equity Method Investments [Line Items]          
Equity in earnings (losses) of unconsolidated joint ventures       161 49
Multifamily | Riverpark at Harrison          
Schedule of Equity Method Investments [Line Items]          
Equity in earnings (losses) of unconsolidated joint ventures       54 68
Multifamily | Station House          
Schedule of Equity Method Investments [Line Items]          
Equity in earnings (losses) of unconsolidated joint ventures       (11) (38)
Multifamily | Urby at Harborside          
Schedule of Equity Method Investments [Line Items]          
Equity in earnings (losses) of unconsolidated joint ventures       3,727 503
Multifamily | PI North - Land          
Schedule of Equity Method Investments [Line Items]          
Equity in earnings (losses) of unconsolidated joint ventures       $ 0 (60)
Unconsolidated Joint Venture Office Buildings | Metropolitan and Lofts at 40 Park          
Schedule of Equity Method Investments [Line Items]          
Sale price   $ 30,300 $ 30,300    
Gain on sale of investments     $ 7,100   $ 7,100
Unconsolidated Joint Venture Office Buildings | Metropolitan and Lofts at 40 Park | Subsequent Event          
Schedule of Equity Method Investments [Line Items]          
Sale price $ 7,100