Property, Plant and Equipment, Net - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Property, Plant and Equipment, Net
Property, plant and equipment, net	$ 297,679		$ 297,679		$ 238,404
Depreciation expense	6,300	$ 5,600	17,500	$ 16,500
India and Switzerland
Property, Plant and Equipment, Net
Property, plant and equipment, net	$ 75,900		$ 75,900		$ 65,100