Annual report pursuant to Section 13 and 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
 12 Months Ended
Jan. 12, 2024
Sep. 01, 2021
Apr. 29, 2021
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]            
Gain on sale from unconsolidated joint ventures       $ 3,102 $ 1,200 $ (4,250)
Gain (loss) from the sale       0 0 (1,886)
Amortization of basis difference       618 154 138
Metropolitan and Lofts at 40 Park | Subsequent Event            
Schedule of Equity Method Investments [Line Items]            
Gain on sale of investments $ 12,100          
Metropolitan and Lofts at 40 Park | Subsequent Event | Veris Residential, Inc.            
Schedule of Equity Method Investments [Line Items]            
Gain on sale of investments $ 6,000          
Riverpark at Harrison            
Schedule of Equity Method Investments [Line Items]            
Litigation Settlement, Expense         900  
Multifamily | Metropolitan and Lofts at 40 Park            
Schedule of Equity Method Investments [Line Items]            
Gain on sale from unconsolidated joint ventures       (1,239) (674) (801)
Multifamily | RiverTrace at Port Imperial            
Schedule of Equity Method Investments [Line Items]            
Gain on sale from unconsolidated joint ventures       546 356 92
Multifamily | Capstone at Port Imperial            
Schedule of Equity Method Investments [Line Items]            
Gain on sale from unconsolidated joint ventures       (294) (212) (506)
Multifamily | Riverpark at Harrison            
Schedule of Equity Method Investments [Line Items]            
Gain on sale from unconsolidated joint ventures       540 234 (1,153)
Multifamily | Station House            
Schedule of Equity Method Investments [Line Items]            
Gain on sale from unconsolidated joint ventures       (299) (722) (1,647)
Multifamily | Urby at Harborside            
Schedule of Equity Method Investments [Line Items]            
Gain on sale from unconsolidated joint ventures       4,110 2,374 (580)
Multifamily | PI North - Land            
Schedule of Equity Method Investments [Line Items]            
Gain on sale from unconsolidated joint ventures       (240) (205) (250)
Multifamily | Liberty Landing            
Schedule of Equity Method Investments [Line Items]            
Gain on sale from unconsolidated joint ventures       (22) 36 (40)
Office | 12 Vreeland Road            
Schedule of Equity Method Investments [Line Items]            
Gain on sale from unconsolidated joint ventures       0 0 2
Gain (loss) from the sale     $ 0      
Sale price     $ 2,000      
Office | Offices At Crystal Lake            
Schedule of Equity Method Investments [Line Items]            
Gain on sale from unconsolidated joint ventures       0 0 (113)
Gain (loss) from the sale   $ 1,900        
Sale price   $ 1,900        
Other            
Schedule of Equity Method Investments [Line Items]            
Gain on sale from unconsolidated joint ventures       3,102 1,200 (4,250)
Other | Other            
Schedule of Equity Method Investments [Line Items]            
Gain on sale from unconsolidated joint ventures       $ 0 $ 13 $ 746