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Inventories (Tables)
6 Months Ended
Jun. 30, 2012
Inventories [Abstract]  
Inventories
                 
    June 30,
2012
    December 31,
2011
 
    (Dollars in thousands)  

Raw materials

  $ 78,489     $ 78,199  

Work in process

    41,736       42,111  

Finished goods

    97,075       108,503  
   

 

 

   

 

 

 

Total inventories

  $ 217,300     $ 228,813