Quarterly report pursuant to Section 13 or 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 $)
 3 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended
Mar. 31, 2013
Mar. 31, 2013
PruRose Port Imperial South 13, L.L.C. [Member]
Oct. 23, 2012
PruRose Port Imperial South 13, L.L.C. [Member]
Mar. 31, 2013
PruRose Port Imperial South 13, L.L.C. [Member]
PR II Port Imperial South 13 Investor, L.L.C. [Member]
Mar. 31, 2013
PruRose Port Imperial South 13, L.L.C. [Member]
Parent Company [Member]
Mar. 31, 2013
Port Imperial 13 [Member]
Oct. 23, 2012
Port Imperial 13 [Member]
item
Mar. 31, 2013
Port Imperial 13 [Member]
PR II Port Imperial South 13 Investor, L.L.C. [Member]
Mar. 31, 2013
Construction Loan [Member]
PruRose Port Imperial South 13, L.L.C. [Member]
Mar. 31, 2013
Construction Loan [Member]
Port Imperial 13 [Member]
PruRose Port Imperial South 13, L.L.C. [Member]
Mar. 31, 2013
Construction Loan Extension Number 1 [Member]
PruRose Port Imperial South 13, L.L.C. [Member]
Mar. 31, 2013
Construction Loan Extension Number 2 [Member]
PruRose Port Imperial South 13, L.L.C. [Member]
Mar. 31, 2013
Land [Member]
Mar. 31, 2013
Land [Member]
PR II Port Imperial South 13 Investor, L.L.C. [Member]
Mar. 31, 2013
Land [Member]
PruRose Port Imperial South 13, L.L.C. [Member]
Parent Company [Member]
Mar. 31, 2013
1.25 [Member]
Construction Loan [Member]
PruRose Port Imperial South 13, L.L.C. [Member]
Mar. 31, 2013
1.40 [Member]
Construction Loan [Member]
PruRose Port Imperial South 13, L.L.C. [Member]
Mar. 31, 2013
Minimum [Member]
Mar. 31, 2013
Minimum [Member]
Construction Loan [Member]
PruRose Port Imperial South 13, L.L.C. [Member]
Mar. 31, 2013
Maximum [Member]
Mar. 31, 2013
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                        
Amount outstanding                 0                          
Percentage of operating return on capital   9.00%                                        
Capital balance       30,000,000 1,800,000                                  
Accumulated unpaid operating return       1,100,000 43,000                                  
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%                                        
Spread over LIBOR                 2.15%                          
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                                           2.79%
Development management and other services fees   $ 42,000                                        
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.