Restructuring - Summary of Restructuring Charges Presented in Condensed Consolidated Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017
Restructuring Cost And Reserve [Line Items]
Restructuring charges	$ 2,072	$ 7,132
Cost of Sales [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring charges	1,908	6,968
Selling, General and Administrative Expenses [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring charges	$ 164	$ 164