Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.2
Investments In Unconsolidated Joint Ventures (Summary Of Unconsolidated Joint Ventures) (Details)
 9 Months Ended
Sep. 01, 2021
USD ($)
Apr. 29, 2021
USD ($)
Sep. 30, 2021
USD ($)
ft²
item
Sep. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Schedule of Equity Method Investments [Line Items]          
Carrying Value     $ 148,507,000   $ 162,382,000
Purchase price of property     $ 49,129,000 $ 123,797,000  
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%    
Construction Loan [Member]          
Schedule of Equity Method Investments [Line Items]          
Debt, Loan Extension Term     1 year    
PI North - Riverwalk C [Member] | Construction Loan [Member]          
Schedule of Equity Method Investments [Line Items]          
Maximum borrowing capacity     $ 112,000,000    
Percent of principal loan outstanding     10.00%    
Riverpark At Harrison [Member]          
Schedule of Equity Method Investments [Line Items]          
Settlement Obligations     $ 500,000    
PI North - Land [Member]          
Schedule of Equity Method Investments [Line Items]          
Number of Apartment Units | item     771    
Residual ownership interest     20.00%    
12 Vreeland Road [Member]          
Schedule of Equity Method Investments [Line Items]          
Gain on sale   $ 2,000,000      
Sale price   $ 2,000,000      
Offices At Crystal Lake [Member]          
Schedule of Equity Method Investments [Line Items]          
Sale price $ 1,900,000        
The Shops At 40 Park Property [Member] | Metropolitan And Lofts At 40 Park [Member]          
Schedule of Equity Method Investments [Line Items]          
Rentable Square Feet (sf) | ft²     50,973    
Balance     $ 6,067,000    
Property Debt, Interest Rate, Spread Over LIBOR     0.015%    
Residual ownership interest     25.00%    
Mortgage loan, maturity month and year     October 2022    
Lofts At 40 Park Property [Member] | Metropolitan And Lofts At 40 Park [Member]          
Schedule of Equity Method Investments [Line Items]          
Number of Apartment Units | item     59    
Balance     $ 18,200,000    
Property Debt, Interest Rate, Spread Over LIBOR     0.015%    
Indirect ownership interest     50.00%    
Number of stories | item     5    
Mortgage loan, maturity month and year     January 2023    
Metropolitan Property [Member] | Metropolitan And Lofts At 40 Park [Member]          
Schedule of Equity Method Investments [Line Items]          
Balance     $ 36,500,000    
Property Debt, Interest Rate, Spread Over LIBOR     0.0285%    
Mortgage loan, maturity month and year     October 2023    
Unconsolidated Joint Venture Multi-Family Properties [Member]          
Schedule of Equity Method Investments [Line Items]          
Number of Apartment Units | item     1,786    
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     $ 2,688,000   3,347,000
Balance     $ 60,767,000    
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     $ 6,139,000   6,667,000
Balance     $ 82,000,000    
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     $ 36,709,000   36,992,000
Balance     $ 103,954,000    
Property Debt, Maturity Date     Dec. 06, 2021    
Property Debt, Interest Rate     2.75%    
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     $ (521,000)   681,000
Balance     $ 30,192,000    
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     $ 33,542,000   34,026,000
Balance     $ 93,789,000    
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     $ 67,588,000   72,752,000
Balance     $ 191,805,000    
Property Debt, Maturity Date     Aug. 01, 2029    
Property Debt, Interest Rate     5.197%    
Guaranteed amount     $ 22,000,000    
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     $ 1,678,000   1,678,000
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     $ 337,000   337,000
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         1,811,000
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         3,744,000
Gain on sale (1,900,000)        
Sale price $ 1,900,000        
Unconsolidated Joint Venture Other Property [Member]          
Schedule of Equity Method Investments [Line Items]          
Carrying Value     $ 148,507,000   162,382,000
Balance     $ 662,507,000    
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     $ 100,000,000    
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     $ 347,000   $ 347,000