Annual report pursuant to Section 13 and 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 $)
12 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2012
West New York Parcel G Apartments Investors, L.L.C. [Member]
Dec. 31, 2012
Riverwalk G Urban Renewal, L.L.C. [Member]
Dec. 31, 2012
Prudential [Member]
Oct. 23, 2012
PruRose Riverwalk G, L.L.C. [Member]
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Dec. 31, 2012
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]
Dec. 31, 2012
Construction Loan [Member]
West New York Parcel G Apartments Investors, L.L.C. [Member]
Dec. 31, 2012
Construction Loan [Member]
Riverwalk G Urban Renewal, L.L.C. [Member]
Dec. 31, 2012
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             83,100,000 83,100,000  
Percentage of operating return on capital     7.75%              
Capital balance       14,700,000   35,000,000        
Accumulated unpaid operating return           3,700,000        
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                 18,800,000  
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     $ 133,000