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Goodwill and Other Intangibles Assets (Tables)
6 Months Ended
Jun. 30, 2011
Goodwill and Other Intangible Assets [Abstract]  
Carrying amount of goodwill
         
Balance as of December 31, 2010 (as previously reported)
  $ 4,199,905  
Goodwill allocated to disposal and hospitals held for sale
    (49,658 )
 
     
Balance as of December 31, 2010 (as adjusted)
    4,150,247  
Goodwill acquired as part of acquisitions during 2011
    77,760  
Consideration adjustments and purchase price allocation adjustments for prior year’s acquisitions
    (37 )
 
     
Balance as of June 30, 2011
  $ 4,227,970