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Property, Plant and Equipment (Tables)
12 Months Ended
Dec. 31, 2011
Property, Plant and Equipment [Abstract]  
Property Plant and Equipment
Property, plant, and equipment, at December 31, consist of the following:
 
   
2011
  
2010
 
Land and improvements
 $13,021  $13,040 
Buildings and improvements
  320,552   318,767 
Machinery and equipment
  1,387,010   1,381,524 
Construction in progress
  162,161   144,287 
    1,882,744   1,857,618 
Less accumulated depreciation
  (664,519)  (600,648)
Property, plant, and equipment - net
 $1,218,225  $1,256,970