Inventories, Net - Schedule of Inventories (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Inventory Disclosure [Abstract]
Raw materials	$ 111,587	$ 107,357
Work in progress	108,110	112,514
Finished goods	200,646	207,295
Inventory, gross, Total	420,343	427,166
Less: allowance for obsolete and excess inventory	(36,570)	(34,607)
Total inventory	$ 383,773	$ 392,559