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Inventories
6 Months Ended
Jun. 29, 2013
Inventory, Net [Abstract]  
Inventories
Inventories (in thousands):

 
June 29,
2013
 
December 29,
2012
Work in progress
$
28,878

  
$
27,915

Finished goods
20,776

  
16,279

Total inventories
$
49,654

  
$
44,194