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Inventories (Details) (USD $)
In Thousands
Jul. 02, 2011
Dec. 25, 2010
Inventories [Abstract]    
Raw materials and supplies $ 57,532 $ 47,737
Work-in-process 64,607 34,784
Finished goods 179,820 131,921
Valuation reserves (4,960) (4,550)
Inventories $ 296,999 $ 209,892