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Property Plant and Equipment (Tables)
12 Months Ended
Dec. 31, 2012
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment

Property, plant and equipment is comprised of the following:

 

                     
    December 31,
2011
    December 31,
2012
    Estimated
Useful Lives

Land and improvements

  $ 92,386     $ 91,456     10 to 25 years

Buildings and improvements

    193,189       197,330     10 to 40 years

Machinery and equipment

    415,828       511,753     5 to 10 years

Construction in progress

    78,884       95,414      
   

 

 

   

 

 

     
      780,287       895,953      

Accumulated depreciation

    (160,570     (267,345    
   

 

 

   

 

 

     

Property, plant and equipment, net

  $ 619,717     $ 628,608