Rationalization Charges - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 42,195	$ 43,713
Other Restructuring | Rationalization Plan
Restructuring Cost and Reserve [Line Items]
Remaining expenses	2,100
Remaining cash expenditure	3,900
Annually Over Next Twenty Years | Central States Pension Plan withdrawal
Restructuring Cost and Reserve [Line Items]
Remaining interest accretion expense	1,100
Remaining cash expenditure	3,100
Accrued Liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	4,800
Other Liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 37,400