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Inventories - Summary of Inventories Net (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Sep. 30, 2011
Inventory Net [Line Items]    
Raw materials $ 58,515 $ 59,928
Work-in-process 23,434 25,465
Finished goods 370,684 349,237
Inventory, net $ 452,633 $ 434,630