Quarterly report pursuant to Section 13 or 15(d)

Investments in Unconsolidated Real Estate Joint Ventures Unconsolidated Real Estate Joint Ventures (Details)

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Investments in Unconsolidated Real Estate Joint Ventures Unconsolidated Real Estate Joint Ventures (Details) (USD $)
6 Months Ended
Jun. 30, 2011
Dec. 31, 2010
Jun. 30, 2011
Deer Park [Member]
Jun. 30, 2011
Deer Park Warehouse [Member]
Jun. 30, 2011
Wisconsin Dells [Member]
Jun. 30, 2011
Equity Method Investee [Member]
SquareFeet
Schedule of Equity Method Investments [Line Items]            
Equity Method Investment, Ownership Percentage     33.30% [1]   50.00%  
Square Footage of Real Estate Property     683,033 [1] 29,253 265,061 0
Equity Method Investments $ 4,600,000 $ 6,400,000 $ 108,000 [1]   $ 4,300,000 $ 200,000
Joint Venture Debt     $ 269,300,000 [1] $ 2,300,000 $ 24,300,000 $ 0
Reduction in Investment Percentage for Profits Earned From Leasing Services     33.30%   50.00%  
[1] Includes a 29,253 square foot warehouse adjacent to the shopping center with a mortgage note of approximately $2.3 million.