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Interim Financial Statements (Details)
Jun. 30, 2011
Dec. 31, 2010
Notes to Financial Statements [Abstract]    
Number of urban and suburban shopping centers in the Company's owned portfolio 23  
Number of states in which the Company has shopping centers 10  
Westfarms [Member]
   
Schedule of Equity Method Investments [Line Items]    
Ownership percentage (in hundredths) 79.00% 79.00%