Restructuring - Rollforward of Restructuring Liability (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)
Restructuring Cost and Reserve [Line Items]
Liability as of January 1, 2020	$ 86,564
Restructuring costs	1,439
Cash payments	(46,150)
Non-cash charges	(2,307)
Translation	(1,272)
Liability as of March 31, 2020	38,274
Severance and other employee costs
Restructuring Cost and Reserve [Line Items]
Liability as of January 1, 2020	77,597
Restructuring costs	(454)
Cash payments	(44,393)
Non-cash charges	0
Translation	(1,037)
Liability as of March 31, 2020	31,713
Facility and closure costs
Restructuring Cost and Reserve [Line Items]
Liability as of January 1, 2020	8,967
Restructuring costs	(414)
Cash payments	(1,757)
Non-cash charges	0
Translation	(235)
Liability as of March 31, 2020	6,561
Accelerated operating lease costs
Restructuring Cost and Reserve [Line Items]
Liability as of January 1, 2020	0
Restructuring costs	2,071
Cash payments	0
Non-cash charges	(2,071)
Translation	0
Liability as of March 31, 2020	0
Asset impairments
Restructuring Cost and Reserve [Line Items]
Liability as of January 1, 2020	0
Restructuring costs	236
Cash payments	0
Non-cash charges	(236)
Translation	0
Liability as of March 31, 2020	$ 0