Facility Closures - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2018	Jun. 30, 2017
Restructuring Cost and Reserve [Line Items]
Loss on dispositions of assets				$ 70	$ 3,030
Facility Closing Wolverhampton, United Kingdom [Member]
Restructuring Cost and Reserve [Line Items]
Loss on dispositions of assets			$ (3,200)
Cost of Sales [Member] | Facility Closing Bangalore, India [Member]
Restructuring Cost and Reserve [Line Items]
Facility closure costs	$ 600
Cost of Sales [Member] | Facility Closing Reynosa, Mexico [Member]
Restructuring Cost and Reserve [Line Items]
Future Lease Obligation, Net of Sublease Income	(1,100)	$ 1,500
Restructuring and Related Cost, Accelerated Depreciation		$ 1,200
Selling, General and Administrative Expenses [Member] | Facility Closing Bangalore, India [Member]
Restructuring Cost and Reserve [Line Items]
Facility closure costs	$ 700
Selling, General and Administrative Expenses [Member] | Facility Closing Wolverhampton, United Kingdom [Member]
Restructuring Cost and Reserve [Line Items]
Gain (Loss) on Disposition of Business			$ (3,500)