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Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 30, 2013
Dec. 29, 2012
Inventory, Net [Abstract]    
Raw materials $ 38,362 $ 26,749
Work-in-progress 13,054 11,589
Finished goods 118,643 79,627
Inventory, net $ 170,059 $ 117,965