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Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 29, 2013
Dec. 29, 2012
Inventories [Abstract]    
Raw materials $ 59,788 $ 51,216
Work in process 18,912 17,907
Finished goods 65,658 61,309
Inventories, net $ 144,358 $ 130,432