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Inventories (Detail) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Inventory Disclosure [Abstract]    
Raw materials $ 130,567 $ 131,228
Work in process 201,729 185,066
Finished goods 1,621,622 1,524,271
Total Inventories $ 1,953,918 $ 1,840,565