Restructuring (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		21 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021
Restructuring Cost and Reserve [Line Items]
Restructuring charges incurred	$ 2,114	$ 167	$ (5,002)	$ (10,418)
Restructuring Reserve [Roll Forward]
Balance as of January 1, 2021			22,051
Costs incurred			4,629
Cash disbursements			(21,376)
Translation adjustments and other			(214)
Balance as of June 30, 2021	5,090		5,090		$ 5,090
2020 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges incurred	(600)		(7,600)		(31,200)
2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges incurred	$ 2,800	$ 200	$ 2,800	$ (10,400)	$ (20,600)