Quarterly report pursuant to Section 13 or 15(d)

Classes of Inventory (Detail)

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Classes of Inventory (Detail) (USD $)
Sep. 30, 2012
Dec. 31, 2011
Components Of Inventory [Line Items]    
Raw materials $ 20,600,000 $ 21,700,000
Work in process 1,900,000 2,500,000
Finished goods 291,100,000 223,500,000
Total $ 313,581,000 $ 247,696,000