Restructuring (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended	24 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2021
Restructuring Cost and Reserve [Line Items]
Restructuring charges incurred	$ (565)	$ (21)	$ (5,567)	$ (10,439)
Restructuring Reserve [Roll Forward]
Balance as of January 1, 2021			22,051
Costs incurred			5,194
Cash disbursements			(23,856)
Translation adjustments and other			(300)
Balance as of September 30, 2021	3,089		3,089		$ 3,089	$ 3,089
2020 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges incurred	(400)		(7,900)		$ (31,600)
2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges incurred	$ 2,800		$ 2,800	$ (10,400)		$ (20,600)