Inventories, net - Schedule of Inventories (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Inventory Disclosure [Abstract]
Raw materials	$ 82,154	$ 85,684
Work in progress	76,070	81,645
Finished goods	235,783	233,732
Inventory, gross, Total	394,007	401,061
Less: allowance for obsolete and excess inventory	(47,270)	(45,648)
Net inventory	$ 346,737	$ 355,413