Rationalization Charges - Activity in Rationalization Plan Reserves (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Restructuring Reserve [Roll Forward]
Balance at December 31, 2020			$ 41,560
Charged to expense	$ 354	$ 1,942	10,711	$ 4,741
Utilized and currency translation			(8,065)
Balance at June 30, 2021	44,206		44,206
Employee Severance and Benefits
Restructuring Reserve [Roll Forward]
Balance at December 31, 2020			41,005
Charged to expense			6,172
Utilized and currency translation			(3,258)
Balance at June 30, 2021	43,919		43,919
Plant Exit Costs
Restructuring Reserve [Roll Forward]
Balance at December 31, 2020			555
Charged to expense			(5)
Utilized and currency translation			(263)
Balance at June 30, 2021	287		287
Non-Cash Asset Write-Down
Restructuring Reserve [Roll Forward]
Balance at December 31, 2020			0
Charged to expense			4,544
Utilized and currency translation			(4,544)
Balance at June 30, 2021	$ 0		$ 0