Annual report pursuant to Section 13 and 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 $)
2 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2012
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 $ 6,000    
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 4,400,000 4,400,000  
Accumulated unpaid operating return $ 1,200,000 1,200,000  
Riverwalk Property [Member]
     
Schedule of Equity Method Investments [Line Items]      
Area of property (in square feet)     30,745