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Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Mar. 31, 2013
Inventory [Line Items]      
Raw materials and work in process $ 111,871 $ 89,863 $ 107,166
Finished goods 538,906 478,980 492,735
Inventories $ 650,777 $ 568,843 $ 599,901