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Inventories - Summary of Inventories (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Inventory Disclosure [Abstract]    
Raw material $ 150,150 $ 78,352
Work-in-process 39,105 23,297
Finished goods 86,614 50,982
Inventories $ 275,869 $ 152,631