Restructuring Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 4,854	$ 625	$ 1,431
Total COGS and SGA
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 8,200	$ 600	$ 1,400