Annual report pursuant to Section 13 and 15(d)

Investments In Unconsolidated Joint Ventures (PruRose Port Imperial South 13, LLC) (Narrative) (Details)

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Investments In Unconsolidated Joint Ventures (PruRose Port Imperial South 13, LLC) (Narrative) (Details) (USD $)
 2 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2012
PruRose Port Imperial South 13, L.L.C. [Member]
Dec. 31, 2012
PruRose Port Imperial South 13, L.L.C. [Member]
Oct. 23, 2012
PruRose Port Imperial South 13, L.L.C. [Member]
Dec. 31, 2012
PruRose Port Imperial South 13, L.L.C. [Member]
PR II Port Imperial South 13 Investor, L.L.C. [Member]
Dec. 31, 2012
PruRose Port Imperial South 13, L.L.C. [Member]
Parent Company [Member]
Dec. 31, 2012
Port Imperial 13 [Member]
Oct. 23, 2012
Port Imperial 13 [Member]
item
Dec. 31, 2012
Port Imperial 13 [Member]
PR II Port Imperial South 13 Investor, L.L.C. [Member]
Dec. 31, 2012
Construction Loan [Member]
PruRose Port Imperial South 13, L.L.C. [Member]
Dec. 31, 2012
Construction Loan [Member]
Port Imperial 13 [Member]
PruRose Port Imperial South 13, L.L.C. [Member]
Dec. 31, 2012
Construction Loan Extension Number 1 [Member]
PruRose Port Imperial South 13, L.L.C. [Member]
Dec. 31, 2012
Construction Loan Extension Number 2 [Member]
PruRose Port Imperial South 13, L.L.C. [Member]
Dec. 31, 2012
Land [Member]
Dec. 31, 2012
Land [Member]
PR II Port Imperial South 13 Investor, L.L.C. [Member]
Dec. 31, 2012
Land [Member]
PruRose Port Imperial South 13, L.L.C. [Member]
Parent Company [Member]
Dec. 31, 2012
1.25 [Member]
Construction Loan [Member]
PruRose Port Imperial South 13, L.L.C. [Member]
Dec. 31, 2012
1.40 [Member]
Construction Loan [Member]
PruRose Port Imperial South 13, L.L.C. [Member]
Dec. 31, 2012
Minimum [Member]
Dec. 31, 2012
Minimum [Member]
Construction Loan [Member]
PruRose Port Imperial South 13, L.L.C. [Member]
Dec. 31, 2012
Maximum [Member]
Dec. 31, 2012
Maximum [Member]
Construction Loan [Member]
PruRose Port Imperial South 13, L.L.C. [Member]
Jan. 01, 2016
Scenario, Forecast [Member]
Construction Loan [Member]
PruRose Port Imperial South 13, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]                                              
Percentage of interest in venture       20.00%                             7.50%   80.00%    
Number of units               280                              
Total project costs             $ 96,400,000   $ 23,100,000                            
Contributed capital                           21,000,000 19,200,000 1,800,000              
Maximum borrowing capacity 600,000,000                 73,400,000 73,400,000                        
Percentage of operating return on capital     9.00%                                        
Capital balance         28,800,000 1,800,000                                  
Accumulated unpaid operating return         400,000 1,800                                  
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%                                        
Spread over LIBOR                   2.25%                          
Loan maturity date                   Jun. 01, 2016                          
Loan extension period                       1 year 6 months                    
Extension fee                       0.25% 0.25%                    
Amount of debt guaranteed by company                   11,000,000                          
Amount of debt guaranteed by the company after debt service coverage ratio threshold reached                                 7,400,000 0          
Threshold of payment guarantee reduction, debt service coverage ratio                                       1.25      
Threshold of payment guarantee termination, debt service coverage ratio                                       1.40      
Percentage of loan that has a fixed interest rate                                           95.00%  
Interest rate                                             2.89%
Development management and other services fees   $ 203,000                                          
Holding and distribution pattern under operating agreement     In general, the operating agreement of PruRose 13 provides that operating cash flows are distributed to members first to Prudential 13 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.