Annual report pursuant to Section 13 and 15(d)

Investments In Unconsolidated Joint Ventures (Portside Master Company, L.L.C.) (Narrative) (Details)

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Investments In Unconsolidated Joint Ventures (Portside Master Company, L.L.C.) (Narrative) (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Oct. 23, 2012
Schedule of Equity Method Investments [Line Items]    
Maximum borrowing capacity 600,000,000  
PR II Portside Investors, L.L.C. [Member]
    
Schedule of Equity Method Investments [Line Items]    
Percentage of capital event cash flows distributed 65.00%  
Internal rate of return 12.00%  
Portside Apartment Holdings, L.L.C. [Member]
    
Schedule of Equity Method Investments [Line Items]    
Percentage of operating return on capital 9.00%  
Development management and other services fees 89,000  
Holding and distribution pattern under operating agreement In general, the operating agreement of Portside Apartment Holdings provides that operating cash flows are distributed to members first to Prudential Portside and then to Portside Master 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.  
Portside Master Company, L.L.C. [Member]
    
Schedule of Equity Method Investments [Line Items]    
Indirect residual ownership percentage   38.25%
Investment ownership percentage   85.00%
Percentage of capital event cash flows distributed 35.00%  
Portside Master Company's Interest In Portside Apartment Holdings [Member]
    
Schedule of Equity Method Investments [Line Items]    
Investment ownership percentage   45.00%
Construction Loan [Member] | Portside Apartment Holdings, L.L.C. [Member]
    
Schedule of Equity Method Investments [Line Items]    
Maximum borrowing capacity 42,500,000  
Spread over LIBOR 2.50%  
Loan maturity date Dec. 01, 2015  
Number of extension options 2  
Loan extension period 1 year  
Percentage of debt guaranteed by the company 50.00%  
Percentage of debt guaranteed by the company after project completion 25.00%  
Percentage of debt guaranteed by the company after debt service coverage ratio threshold reached 10.00%  
Construction Loan Extension Number 1 [Member] | Portside Apartment Holdings, L.L.C. [Member]
    
Schedule of Equity Method Investments [Line Items]    
Extension fee 0.125%  
Construction Loan Extension Number 2 [Member] | Portside Apartment Holdings, L.L.C. [Member]
    
Schedule of Equity Method Investments [Line Items]    
Extension fee 0.25%  
Portside At Pier One Building Seven Property [Member]
    
Schedule of Equity Method Investments [Line Items]    
Number of units   176
Total project costs 66,300,000  
Portside At Pier One Building Seven Property [Member] | PR II Portside Investors, L.L.C. [Member]
    
Schedule of Equity Method Investments [Line Items]    
Total project costs 23,800,000  
Portside At Pier One Building Seven Property [Member] | Construction Loan [Member] | Portside Apartment Holdings, L.L.C. [Member]
    
Schedule of Equity Method Investments [Line Items]    
Maximum borrowing capacity 42,500,000  
Minimum [Member] | Construction Loan [Member] | Portside Apartment Holdings, L.L.C. [Member]
    
Schedule of Equity Method Investments [Line Items]    
Threshold of payment guarantee termination, debt service coverage ratio 1.25  
Portside Master Company, L.L.C. [Member] | PR II Portside Investors, L.L.C. [Member]
    
Schedule of Equity Method Investments [Line Items]    
Capital balance 4,300,000  
Accumulated unpaid operating return 25,000