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Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 29, 2012
Dec. 31, 2011
Inventory Disclosure [Abstract]    
Raw Materials $ 29,434 $ 39,821
Work in Process 87,740 67,258
Finished Goods 36,959 44,498
Total inventories $ 154,133 $ 151,577