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Discontinued Operations (Tables)
12 Months Ended
Dec. 31, 2010
Discontinued Operations [Abstract]  
Schedule Of Discontinued Operations
     For the Years Ended December 31,  
     2010      2009      2008  

Revenues

   $ 3,838       $ 3,269       $ 12,970   

Gain on sale

     9,072         278         9,305   

Income from discontinued operations

     9,784         2,697         14,143   

Income from discontinued operations — diluted per share/units

   $ 0.10       $ 0.04       $ 0.23