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Inventories (Tables)
6 Months Ended
Jun. 28, 2014
Inventory Items, Net Of Reserves Alternative [Abstract]  
Inventory, Net of Reserves

Inventories are classified as follows (in thousands):

   June 28, 2014 December 31, 2013
Raw materials $88,054 $76,930
Work in progress  20,317  19,656
Finished goods  164,393  146,214
 Total inventories $272,764 $242,800