Quarterly report pursuant to Section 13 or 15(d)

Investments In Unconsolidated Joint Ventures (Summary Of Company's Equity In Earnings (Loss) Of Unconsolidated Joint Ventures) (Details)

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Investments In Unconsolidated Joint Ventures (Summary Of Company's Equity In Earnings (Loss) Of Unconsolidated Joint Ventures) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Sep. 01, 2021
Mar. 31, 2022
Mar. 31, 2021
Schedule of Equity Method Investments [Line Items]      
Company's equity in earnings (loss) of unconsolidated joint ventures   $ (487) $ (1,456)
Amortization of basis difference   154 143
Unconsolidated Joint Venture Multi-Family Properties [Member] | Metropolitan And Lofts At 40 Park [Member]      
Schedule of Equity Method Investments [Line Items]      
Company's equity in earnings (loss) of unconsolidated joint ventures   $ (139) (231)
Company's Effective Ownership %   25.00%  
Unconsolidated Joint Venture Multi-Family Properties [Member] | RiverTrace At Port Imperial [Member]      
Schedule of Equity Method Investments [Line Items]      
Company's equity in earnings (loss) of unconsolidated joint ventures   $ 67 (5)
Company's Effective Ownership %   22.50%  
Unconsolidated Joint Venture Multi-Family Properties [Member] | PI North - Riverwalk C [Member]      
Schedule of Equity Method Investments [Line Items]      
Company's equity in earnings (loss) of unconsolidated joint ventures   $ 26  
Unconsolidated Joint Venture Multi-Family Properties [Member] | Riverpark At Harrison [Member]      
Schedule of Equity Method Investments [Line Items]      
Company's equity in earnings (loss) of unconsolidated joint ventures     (50)
Company's Effective Ownership %   45.00%  
Unconsolidated Joint Venture Multi-Family Properties [Member] | Station House [Member]      
Schedule of Equity Method Investments [Line Items]      
Company's equity in earnings (loss) of unconsolidated joint ventures   $ (358) (364)
Company's Effective Ownership %   50.00%  
Unconsolidated Joint Venture Multi-Family Properties [Member] | Urby At Harborside [Member]      
Schedule of Equity Method Investments [Line Items]      
Company's equity in earnings (loss) of unconsolidated joint ventures   $ (26) (745)
Company's Effective Ownership %   85.00%  
Unconsolidated Joint Venture Multi-Family Properties [Member] | PI North Pier Land [Member]      
Schedule of Equity Method Investments [Line Items]      
Company's equity in earnings (loss) of unconsolidated joint ventures   $ (70) (57)
Unconsolidated Joint Venture Multi-Family Properties [Member] | Liberty Landing [Member]      
Schedule of Equity Method Investments [Line Items]      
Company's Effective Ownership %   50.00%  
Unconsolidated Joint Venture Office Buildings [Member] | Offices At Crystal Lake [Member]      
Schedule of Equity Method Investments [Line Items]      
Company's equity in earnings (loss) of unconsolidated joint ventures     (118)
Sale price $ 1,900    
Unconsolidated Joint Venture Other Property [Member] | Other [Member]      
Schedule of Equity Method Investments [Line Items]      
Company's equity in earnings (loss) of unconsolidated joint ventures   $ 13 $ 114