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Inventories (Tables)
9 Months Ended
Oct. 03, 2015
Inventory Items, Net Of Reserves Alternative [Abstract]  
Inventory, Net of Reserves

Inventories are classified as follows (in thousands):

   October 3, 2015 December 31, 2014
Raw materials $94,226 $84,952
Work in progress  21,814  16,749
Finished goods  165,746  144,729
 Total inventories $281,786 $246,430