Quarterly report pursuant to Section 13 or 15(d)

Investments In Unconsolidated Joint Ventures (PruRose Port Imperial South 15, L.L.C) (Narrative) (Details)

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Investments In Unconsolidated Joint Ventures (PruRose Port Imperial South 15, L.L.C) (Narrative) (Details) (USD $)
 0 Months Ended 3 Months Ended 9 Months Ended 9 Months Ended
Jul. 15, 2013
Sep. 30, 2013
PruRose Port Imperial South 15, L.L.C. [Member]
Sep. 30, 2013
PruRose Port Imperial South 15, L.L.C. [Member]
Oct. 23, 2012
PruRose Port Imperial South 15, L.L.C. [Member]
item
sqft
Sep. 30, 2013
PruRose Port Imperial South 15, L.L.C. [Member]
Prudential-Port [Member]
Sep. 30, 2013
Refinance Loan [Member]
PruRose Port Imperial South 15, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]            
Percentage of interest in venture       50.00%    
Number of units       236    
Area of property (in square feet)       214,402    
Third party ownership percentage       50.00%    
Percentage of operating return on capital     9.00%      
Capital balance         $ 33,800,000  
Accumulated unpaid operating return         5,100,000  
Percent of distributions paid to third party after threshold reached     20.00%      
Threshold of internal rate of return for distributions to third party     8.00%      
Mortgage loans, carrying amount   57,000,000 57,000,000     57,500,000
Spread over LIBOR 1.25%   2.35%      
Mortgage loan, maturity date     August 2013     September 2020
Interest rate           4.32%
Management, leasing and other services fees   $ 62,000 $ 185,000      
Holding and distribution pattern under operating agreement     In general, the operating agreement of Port Imperial 15 provides that operating cash flows are distributed to members first to Prudential-Port 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 their ownership percentages.