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Inventories (Tables)
9 Months Ended
Sep. 29, 2018
Inventory Disclosure [Abstract]  
Inventory, Net of Reserves

Inventories are classified as follows (in thousands):

 

     September 29, 2018      December 31, 2017  

Raw materials

   $ 112,588      $ 99,033  

Work in progress

     18,838        15,324  

Finished goods

     182,188        155,937  
  

 

 

    

 

 

 

Total inventories

   $ 313,614      $ 270,294