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Components of Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Inventory Disclosure [Abstract]    
Work-in-process $ 595,380 $ 492,064
Finished goods 562,882 517,904
Inventory, Net, Total $ 1,158,262 $ 1,009,968