Exit Activity Costs and Asset Impairments (Summary of Exit Activity Costs and Asset Impairments) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 3,660	$ 1,567	$ 3,352	$ 4,775
Cost of sales
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	1,621	860	1,465	382
Selling, general, and administrative expense
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 2,039	$ 707	$ 1,887	$ 4,393