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Property and Equipment (Tables)
9 Months Ended
Sep. 30, 2011
Property and Equipment

Property and equipment consisted of the following at September 30, 2011 and December 31, 2010 (in thousands):

 

     September 30,
2011
    December 31,
2010
 

Equipment

   $ 4,537,408      $ 3,972,891   

Oil and natural gas properties

     122,484        110,749   

Buildings

     62,887        61,425   

Land

     11,209        11,074   
  

 

 

   

 

 

 
     4,733,988        4,156,139   

Less accumulated depreciation and depletion

     (1,708,382     (1,535,239
  

 

 

   

 

 

 

Property and equipment, net

   $ 3,025,606      $ 2,620,900