Quarterly report pursuant to Section 13 or 15(d)

Inventories - Classes of Inventory (Detail)

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Inventories - Classes of Inventory (Detail) (USD $)
Mar. 31, 2013
Dec. 31, 2012
Inventory Disclosure [Abstract]    
Raw materials $ 20,400,000 $ 19,600,000
Work in process 2,200,000 1,900,000
Finished goods 311,800,000 317,900,000
Total $ 334,412,000 $ 339,411,000