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Property, Plant and Equipment (Tables)
12 Months Ended
Dec. 31, 2012
Property, Plant and Equipment [Abstract]  
Summary of Property, Plant and Equipment
                     
    Estimated   December 31,  
    Useful Life   2012     2011  

Land owned

      $ 5,937     $ 5,851  

Land under capital lease

        1,396       1,378  

Buildings and improvements owned

  15-40 years     43,751       42,634  

Buildings under capital lease

  20 years     3,082       3,039  

Machinery and equipment

  3-12 years     244,138       237,051  

Construction in process

        20,283       8,434  
       

 

 

   

 

 

 
          318,587       298,387  

Less—accumulated depreciation

        198,900       177,859  
       

 

 

   

 

 

 

Property, plant and equipment, net

      $ 119,687     $ 120,528