Annual report pursuant to Section 13 and 15(d)

Investments In Unconsolidated Joint Ventures (Summary Of Unconsolidated Joint Ventures) (Details)

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Investments In Unconsolidated Joint Ventures (Summary Of Unconsolidated Joint Ventures) (Details)
$ in Thousands
 9 Months Ended 12 Months Ended
Dec. 22, 2021
USD ($)
Sep. 01, 2021
USD ($)
Apr. 29, 2021
USD ($)
Sep. 30, 2020
USD ($)
Dec. 31, 2021
USD ($)
ft²
item
Dec. 31, 2020
USD ($)
ft²
item
Dec. 31, 2019
USD ($)
Schedule of Equity Method Investments [Line Items]              
Number of Apartment Units | item         506 326  
Rentable Square Feet (sf) | ft²         3,049,313 2,725,639  
Carrying Value         $ 137,772 $ 162,382  
Purchase price of property         $ 65,101 138,688 $ 88,240
Property impairments on continuing operations       $ 36,600      
Sale price   $ 1,900          
Minimum [Member]              
Schedule of Equity Method Investments [Line Items]              
Company's Effective Ownership %         20.00%    
Maximum [Member]              
Schedule of Equity Method Investments [Line Items]              
Company's Effective Ownership %         85.00%    
PI North - Riverwalk C [Member]              
Schedule of Equity Method Investments [Line Items]              
Repayments of Long-term Debt $ 108,300            
Debt Instrument, Face Amount 135,000            
Proceeds from Issuance of Debt $ 9,200            
Urby At Harborside [Member]              
Schedule of Equity Method Investments [Line Items]              
Company's Effective Ownership %         85.00%    
Guaranteed amount         $ 22,000    
PI North - Land [Member]              
Schedule of Equity Method Investments [Line Items]              
Residual ownership interest         20.00%    
Number of units available for development | item         771    
12 Vreeland Road [Member]              
Schedule of Equity Method Investments [Line Items]              
Sale price     $ 2,000        
Offices At Crystal Lake [Member]              
Schedule of Equity Method Investments [Line Items]              
Sale price   1,900          
The Shops At 40 Park Property [Member]              
Schedule of Equity Method Investments [Line Items]              
Rentable Square Feet (sf) | ft²         50,973    
Investment Ownership Percentage         25.00%    
Balance         $ 6,067    
Property Debt, Interest Rate, Spread Over LIBOR         1.50%    
Lofts At 40 Park Property [Member]              
Schedule of Equity Method Investments [Line Items]              
Number of Apartment Units | item         59    
Investment Ownership Percentage         50.00%    
Balance         $ 18,200    
Property Debt, Interest Rate, Spread Over LIBOR         1.50%    
Number of stories | item         5    
Metropolitan Property [Member]              
Schedule of Equity Method Investments [Line Items]              
Balance         $ 36,500    
Property Debt, Interest Rate, Spread Over LIBOR         2.85%    
Unconsolidated Joint Venture Multi-Family Properties [Member]              
Schedule of Equity Method Investments [Line Items]              
Number of Apartment Units | item         2,146    
Unconsolidated Joint Venture Multi-Family Properties [Member] | Metropolitan And Lofts At 40 Park [Member]              
Schedule of Equity Method Investments [Line Items]              
Number of Apartment Units | item         189    
Company's Effective Ownership %         25.00%    
Carrying Value         $ 2,547 3,347  
Balance         $ 60,767    
Unconsolidated Joint Venture Multi-Family Properties [Member] | RiverTrace At Port Imperial [Member]              
Schedule of Equity Method Investments [Line Items]              
Number of Apartment Units | item         316    
Company's Effective Ownership %         22.50%    
Carrying Value         $ 6,077 6,667  
Balance         $ 82,000    
Property Debt, Maturity Date         Nov. 10, 2026    
Property Debt, Interest Rate         3.21%    
Unconsolidated Joint Venture Multi-Family Properties [Member] | PI North - Riverwalk C [Member]              
Schedule of Equity Method Investments [Line Items]              
Number of Apartment Units | item         360    
Company's Effective Ownership %         40.00%    
Carrying Value         $ 27,401 36,992  
Balance         $ 135,000    
Property Debt, Maturity Date         Dec. 22, 2024    
Property Debt, Interest Rate         1.20%    
Unconsolidated Joint Venture Multi-Family Properties [Member] | Riverpark At Harrison [Member]              
Schedule of Equity Method Investments [Line Items]              
Number of Apartment Units | item         141    
Company's Effective Ownership %         45.00%    
Carrying Value           681  
Balance         $ 30,192    
Property Debt, Maturity Date         Jul. 01, 2035    
Property Debt, Interest Rate         3.19%    
Unconsolidated Joint Venture Multi-Family Properties [Member] | Station House [Member]              
Schedule of Equity Method Investments [Line Items]              
Number of Apartment Units | item         378    
Company's Effective Ownership %         50.00%    
Carrying Value         $ 33,004 34,026  
Balance         $ 93,329    
Property Debt, Maturity Date         Jul. 01, 2033    
Property Debt, Interest Rate         4.82%    
Unconsolidated Joint Venture Multi-Family Properties [Member] | Urby At Harborside [Member]              
Schedule of Equity Method Investments [Line Items]              
Number of Apartment Units | item         762    
Company's Effective Ownership %         85.00%    
Carrying Value         $ 66,418 72,752  
Balance         $ 191,160    
Property Debt, Maturity Date         Aug. 01, 2029    
Property Debt, Interest Rate         5.197%    
Unconsolidated Joint Venture Multi-Family Properties [Member] | PI North - Land [Member]              
Schedule of Equity Method Investments [Line Items]              
Number of Apartment Units | item         771    
Company's Effective Ownership %         20.00%    
Carrying Value         $ 1,678 1,678  
Unconsolidated Joint Venture Multi-Family Properties [Member] | Liberty Landing [Member]              
Schedule of Equity Method Investments [Line Items]              
Number of Apartment Units | item         850    
Company's Effective Ownership %         50.00%    
Carrying Value         $ 300 337  
Unconsolidated Joint Venture Office Buildings [Member] | 12 Vreeland Road [Member]              
Schedule of Equity Method Investments [Line Items]              
Rentable Square Feet (sf) | ft²         139,750    
Company's Effective Ownership %         50.00%    
Carrying Value           1,811  
Sale price     $ 2,000        
Unconsolidated Joint Venture Office Buildings [Member] | Offices At Crystal Lake [Member]              
Schedule of Equity Method Investments [Line Items]              
Rentable Square Feet (sf) | ft²         106,345    
Company's Effective Ownership %         31.25%    
Carrying Value           3,744  
Sale price   $ 1,900          
Unconsolidated Joint Venture Other Property [Member]              
Schedule of Equity Method Investments [Line Items]              
Carrying Value         $ 137,772 162,382  
Balance         $ 692,448    
Unconsolidated Joint Venture Other Property [Member] | Hyatt Regency Hotel Jersey City [Member]              
Schedule of Equity Method Investments [Line Items]              
Number of Apartment Units | item         351    
Company's Effective Ownership %         50.00%    
Balance         $ 100,000    
Property Debt, Maturity Date         Oct. 01, 2026    
Property Debt, Interest Rate         3.668%    
Unconsolidated Joint Venture Other Property [Member] | Other [Member]              
Schedule of Equity Method Investments [Line Items]              
Carrying Value         $ 347 $ 347