Quarterly report pursuant to Section 13 or 15(d)

Investments In Unconsolidated Joint Ventures (PruRose Riverwalk G, L.L.C.) (Narrative) (Details)

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Investments In Unconsolidated Joint Ventures (PruRose Riverwalk G, L.L.C.) (Narrative) (Details) (USD $)
 6 Months Ended 3 Months Ended 6 Months Ended 6 Months Ended
Jul. 15, 2013
Jun. 30, 2013
Jun. 30, 2013
West New York Parcel G Apartments Investors, L.L.C. [Member]
Jun. 30, 2013
Riverwalk G Urban Renewal, L.L.C. [Member]
Jun. 30, 2013
Riverwalk G Urban Renewal, L.L.C. [Member]
Jun. 30, 2013
Prudential [Member]
Jun. 30, 2013
PruRose Riverwalk G, L.L.C. [Member]
Oct. 23, 2012
PruRose Riverwalk G, L.L.C. [Member]
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Jun. 30, 2013
PruRose Riverwalk G, L.L.C. [Member]
West New York Parcel G Apartments Investors, L.L.C. [Member]
Oct. 23, 2012
PruRose Riverwalk G's Interest In Riverwalk G Urban Renewal [Member]
Jun. 30, 2013
Construction Loan [Member]
West New York Parcel G Apartments Investors, L.L.C. [Member]
Jun. 30, 2013
Construction Loan [Member]
Riverwalk G Urban Renewal, L.L.C. [Member]
Jun. 30, 2013
RiverTrace Project [Member]
West New York Parcel G Apartments Investors, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]                          
Indirect residual ownership percentage               25.00%          
Number of stories               12          
Number of units               316          
Percentage of interest in venture               50.00%          
Investment ownership percentage                   50.00%      
Total project costs     $ 118,100,000                   $ 35,000,000
Maximum borrowing capacity 600,000,000 600,000,000                 83,100,000 83,100,000  
Percentage of operating return on capital         7.75%                
Capital balance           14,800,000     35,000,000        
Accumulated unpaid operating return                 5,200,000        
Percentage of capital event cash flows distributed     100.00%                    
Internal rate of return     7.75%                    
Amount of company's initial distributions to be redirected           1,300,000              
Amount outstanding                       41,400,000  
Interest rate                       6.00%  
Loan maturity date                       Jul. 01, 2021  
Period of loan guarantee by company following completion of project                       6 months  
Development management and other services fees       $ 174,000 $ 349,000                
Holding and distribution pattern under operating agreement             In general, the operating agreement of Riverwalk G provides that operating cash flows are distributed to members first to Investor and then to PruRose Riverwalk based on a 7.75 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.