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Noncontrolling Interests (Tables)
12 Months Ended
Dec. 31, 2011
Noncontrolling Interests [Abstract]  
Effect Of Changes In Ownership Interest In Subsidiaries
September 30, September 30, September 30,
       2011        2010        2009  

Net income (loss) attributable to common shareholders

     $ 49,379         $ 23,216         $ (50,800

Transfers from the noncontrolling interests:

              

Increase in equity for conversion of operating partnership units

       592           3,528           3,761   

Increase in equity from purchase of noncontrolling interests

       —             —             647   
    

 

 

      

 

 

      

 

 

 

Change in common equity and net transfers from noncontrolling interests

     $ 49,971         $ 26,744         $ (46,392