Quarterly report pursuant to Section 13 or 15(d)

Investments In Unconsolidated Joint Ventures (Roseland/North Retail, L.L.C.) (Narrative) (Details)

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Investments In Unconsolidated Joint Ventures (Roseland/North Retail, L.L.C.) (Narrative) (Details) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2013
Oct. 23, 2012
Port Imperial North Retail, L.L.C. [Member]
      
Schedule of Equity Method Investments [Line Items]      
Residual ownership interest     20.00%
Percentage of operating return on capital   9.00%  
Management, leasing and other services fees $ 8,000 $ 23,000  
Holding and distribution pattern under operating agreement   In general, the operating agreement of PI North Retail provides that operating cash flows are distributed first to Prudential-PI and then to the Company based on a nine percent operating return on each members' capital balance in priorities as detailed in the operating agreement. Excess operating cash flows are distributed to the members in accordance with ownership percentages.  
Roseland/North Retail, L.L.C. [Member] | PR II Port Imperial Retail, L.L.C. [Member]
      
Schedule of Equity Method Investments [Line Items]      
Capital balance 4,300,000 4,300,000  
Accumulated unpaid operating return 1,600,000 1,600,000  
Roseland/North Retail, L.L.C. [Member] | Parent Company [Member]
      
Schedule of Equity Method Investments [Line Items]      
Capital balance $ 0 $ 0  
Riverwalk Property [Member]
      
Schedule of Equity Method Investments [Line Items]      
Area of property (in square feet)     30,745