Inventories - Schedule of Inventory Current (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Finished goods	$ 91,835	$ 81,194
Work-in-progress	54,619	52,578
Raw materials	90,047	82,734
Total	$ 236,501	$ 216,506