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Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Jun. 30, 2012
Schedule of Inventory [Line Items]      
Raw materials and work in process $ 142,950 $ 79,216 $ 141,036
Finished goods 650,661 385,841 605,671
Inventories $ 793,611 $ 465,057 $ 746,707