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Property, Plant and Equipment (Tables)
12 Months Ended
Dec. 31, 2013
Schedule of Property, Plant and Equipment
     (In thousands)
December 31,
 
     2013     2012  

Land and improvements

   $ 555,309      $ 546,234   

Buildings and improvements

     941,379        899,944   

Machinery and equipment

     9,159,151        8,136,206   

Proved oil and gas properties

     487,033        203,959   

Construction in process and equipment deposits

     400,373        652,230   
  

 

 

   

 

 

 
     11,543,245        10,438,573   

Less accumulated depreciation

     (6,626,221     (6,155,517
  

 

 

   

 

 

 
   $ 4,917,024      $ 4,283,056