Inventories, net - Schedule of Inventories (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Inventory Disclosure [Abstract]
Raw materials and supplies	$ 85,684	$ 101,311
Work in progress	81,645	104,102
Finished goods	233,732	178,292
Inventory, gross, Total	401,061	383,705
Less: allowance for obsolete and excess inventory	(45,648)	(39,247)
Total inventory	$ 355,413	$ 344,458