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Related Party Transactions (Tables)
6 Months Ended
Jun. 30, 2011
Related Party Transactions  
Schedule of Fees Earned from Related Parties
     Six Months
Ended June 30,
 
     2011      2010  

Management fees

   $ 4,623       $ 4,142   

Leasing fees

     2,801         1,105   

Construction and development fees

     2,396         4,036