Annual report pursuant to Section 13 and 15(d)

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

v3.19.3.a.u2
Investments In Unconsolidated Joint Ventures (Summary Of Unconsolidated Joint Ventures) (Details)
 1 Months Ended 9 Months Ended 12 Months Ended
Feb. 28, 2019
USD ($)
Jan. 31, 2019
USD ($)
item
Jan. 30, 2019
USD ($)
Dec. 11, 2018
USD ($)
Aug. 02, 2018
USD ($)
item
Jan. 31, 2020
USD ($)
Oct. 31, 2019
USD ($)
Sep. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
ft²
item
Dec. 31, 2018
USD ($)
item
Dec. 31, 2017
USD ($)
Aug. 01, 2018
USD ($)
Schedule of Equity Method Investments [Line Items]                        
Number of Apartment Units | item                 208 1,317    
Carrying Value                 $ 209,091,000 $ 232,750,000    
Balance                   45,242,000 $ 45,734,000  
Purchase price of property                 $ 97,504,000 $ 112,511,000 $ 90,422,000  
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%      
Marbella Tower Urban Renewal Associates LLC [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Number of Apartment Units | item         412              
Company's Effective Ownership %                       24.27%
Balance         $ 131,000,000             $ 95,000,000
Property Debt, Interest Rate, Spread Over LIBOR         4.07%              
Percentage of additional interest acquired         50.00%              
Repayment of mortgage loans         $ 95,000,000              
Purchase price of property         $ 65,600,000              
Mortgage loan, maturity month and year                 August 2026      
Metropolitan At 40 Park [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Rentable Square Feet (sf) | ft²                 50,973      
Purchase price of property       $ 1,300,000                
Crystal House [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Percentage of interest in developable land                 50.00%      
Number of approved units available for development | item                 738      
PI North - Riverwalk C [Member] | Construction Loan [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Maximum borrowing capacity                 $ 112,000,000      
Red Bank [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Percentage of interest sold 50.00%                      
Gain on sale $ 900,000                      
12 Vreeland Road [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Impairment of Real Estate                 $ 3,700,000      
The Shops At 40 Park Property [Member] | Metropolitan At 40 Park [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Property Debt, Interest Rate, Spread Over LIBOR             1.50%          
Residual ownership interest       12.50%         25.00% 25.00%    
Mortgage loan, maturity month and year             October 2021          
Lofts At 40 Park Property [Member] | Metropolitan At 40 Park [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Number of Apartment Units | item                 59      
Balance               $ 6,067,000        
Property Debt, Interest Rate, Spread Over LIBOR               2.25%        
Residual ownership interest       25.00%         50.00%      
Indirect ownership interest                 50.00%      
Number of stories | item                 5      
Mortgage loan, maturity month and year               October 2019        
Lofts At 40 Park Property [Member] | Metropolitan At 40 Park [Member] | Construction Loan [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Balance             $ 13,145,000          
Property Debt, Interest Rate, Spread Over LIBOR             2.50%          
Maximum borrowing capacity             $ 13,950,000          
Mortgage loan, maturity month and year             February 2020          
Lofts At 40 Park Property [Member] | Metropolitan At 40 Park [Member] | Subsequent Event [Member] | Construction Loan [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Property Debt, Interest Rate, Spread Over LIBOR           1.50%            
Maximum borrowing capacity           $ 18,200,000            
Mortgage loan, maturity month and year           January 2023            
Metropolitan Property [Member] | Metropolitan At 40 Park [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Balance                 $ 35,161,000      
Property Debt, Interest Rate                 3.25%      
Mortgage loan, maturity month and year               September 2020        
Unconsolidated Joint Venture Multi-Family Properties [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Number of Apartment Units | item                 2,611      
Unconsolidated Joint Venture Multi-Family Properties [Member] | Marbella Tower Urban Renewal Associates LLC [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Number of Apartment Units | item   311                    
Company's Effective Ownership %   74.27% 24.27%   74.27%             24.27%
Balance   $ 117,000,000 $ 74,700,000                  
Property Debt, Interest Rate, Spread Over LIBOR   4.20%                    
Percentage of additional interest acquired   50.00% 50.00%   50.00%              
Repayment of mortgage loans   $ 74,700,000                    
Purchase price of property   $ 77,500,000                    
Mortgage loan, maturity month and year                 August 2026      
Unconsolidated Joint Venture Multi-Family Properties [Member] | Metropolitan 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                 $ 7,257,000 $ 7,679,000    
Balance                 $ 54,373,000      
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                 $ 7,463,000 8,112,000    
Balance                 $ 82,000,000      
Property Debt, Maturity Date                 Nov. 10, 2026      
Property Debt, Interest Rate                 3.21%      
Unconsolidated Joint Venture Multi-Family Properties [Member] | Crystal House [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Number of Apartment Units | item                 825      
Company's Effective Ownership %                 25.00%      
Carrying Value                 $ 28,823,000 29,570,000    
Balance                 $ 159,492,000      
Property Debt, Maturity Date                 Apr. 01, 2020      
Property Debt, Interest Rate                 3.17%      
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                 $ 35,527,000 27,175,000    
Balance                 $ 28,208,000      
Property Debt, Maturity Date                 Dec. 06, 2021      
Property Debt, Interest Rate                 2.75%      
Unconsolidated Joint Venture Multi-Family Properties [Member] | Marbella II [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Number of Apartment Units | item                 311      
Company's Effective Ownership %   74.27% 24.27%           24.27%      
Carrying Value                   15,414,000    
Percentage of additional interest acquired   50.00%                    
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                 $ 1,015,000 1,272,000    
Balance                 $ 29,261,000      
Property Debt, Maturity Date                 Aug. 01, 2025      
Property Debt, Interest Rate                 3.70%      
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                 $ 35,676,000 37,675,000    
Balance                 $ 96,861,000      
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                 $ 79,790,000 85,317,000    
Balance                 $ 192,000,000      
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                 836      
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 Multi-Family Properties [Member] | Hillsborough 206 [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Rentable Square Feet (sf) | ft²                 160,000      
Company's Effective Ownership %                 50.00%      
Carrying Value                 $ 1,962,000 1,962,000    
Unconsolidated Joint Venture Office Buildings [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Rentable Square Feet (sf) | ft²                 200,000      
Unconsolidated Joint Venture Office Buildings [Member] | Red Bank [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Rentable Square Feet (sf) | ft²                 92,878      
Company's Effective Ownership %                 50.00%      
Carrying Value                   3,127,000    
Gain on sale $ 900,000                      
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                 $ 3,846,000 7,019,000    
Balance                 $ 6,267,000      
Property Debt, Maturity Date                 Jul. 01, 2023      
Property Debt, Interest Rate                 2.87%      
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                 $ 3,521,000 3,442,000    
Balance                 $ 3,322,000      
Property Debt, Maturity Date                 Nov. 01, 2023      
Property Debt, Interest Rate                 4.76%      
Unconsolidated Joint Venture Other Property [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Carrying Value                 $ 209,091,000 232,750,000    
Balance                 $ 751,784,000      
Unconsolidated Joint Venture Other Property [Member] | Marbella Tower Urban Renewal Associates LLC [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Number of Apartment Units | item   311                    
Company's Effective Ownership %     24.27%                  
Balance   $ 117,000,000                    
Percentage of additional interest acquired   50.00%                    
Repayment of mortgage loans     $ 74,700,000                  
Purchase price of property   $ 77,500,000                    
Unconsolidated Joint Venture Other Property [Member] | Riverwalk Retail [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Rentable Square Feet (sf) | ft²                 30,745      
Company's Effective Ownership %                 20.00%      
Carrying Value                 $ 1,467,000 1,539,000    
Unconsolidated Joint Venture Other Property [Member] | Hyatt Regency Jersey City [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Number of Apartment Units | item                 351      
Company's Effective Ownership %                 50.00%      
Carrying Value                   112,000    
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                 $ 729,000 $ 1,320,000