Annual report pursuant to Section 13 and 15(d)

Acquisition of Rental Property (Details)

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Acquisition of Rental Property (Details) (USD $)
 12 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2011
Prime Outlets at Jeffersonville [Member]
SquareFeet
Dec. 31, 2011
Atlantic City and Ocean City [Member]
Dec. 31, 2011
Atlantic City Outlets The Walk [Member]
SquareFeet
Dec. 31, 2011
The Outlets at Hershey [Member]
SquareFeet
Jun. 30, 2011
Bridge Loan [Member]
Acquistion of Rental Property [Line Items]            
Business Acquisition, Effective Date of Acquisition   June 28, 2011     September 30, 2011  
Business Acquisition, Total Consideration Transfered For, and In Connection With The Acquisition         $ 56,000,000  
Business Acquisition, Purchase Price Allocation, Liabilities Assumed     83,500,000   31,400,000  
Business Acquisition, Cost of Acquired Entity, Purchase Price     200,300,000      
Business Acquisition, Cost of Acquired Entity, Cash Paid   134,000,000 116,800,000   24,600,000  
Long-term Debt           150,000,000
Square Footage of Real Estate Property   410,000   490,000 247,000  
Business Acquisition, Contingent Consideration, Potential Cash Payment     3,000,000      
Outlet Center Occupancy Percentage 99.00%          
Notes Receivable, Related Parties         6,200,000  
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual 18,500,000          
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual $ (1,500,000)