Rationalization Charges - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 43,141	$ 41,560
Other Restructuring | Rationalization Plan
Restructuring Cost and Reserve [Line Items]
Remaining expenses	1,200
Remaining cash expenditures	5,900
Annually Through 2040 | Central States Pension Plan withdrawal
Restructuring Cost and Reserve [Line Items]
Remaining cash expenditures	3,100
Accretion expense	1,100
Accrued Liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	7,100
Other Liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 36,000