Restatement of Previously Issued Financial Statements - Consolidated Statements of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net loss	$ 28,424	$ (131,567)	$ (55,951)	$ (181,986)	$ (25,281)	$ (129,633)	$ (159,094)	$ (336,900)
Interest rate swaps	333			1,092			1,884	(2,052)
Defined benefit pension plans	(4)			(15)			(12)	(57)
Foreign currency translation adjustment	(241,420)			9,359			(176,246)	1,795
Other Comprehensive Income (Loss), Net of Tax	(241,091)	47,124	19,593	10,436	(2,280)	(8,470)	(174,374)	(314)
Other comprehensive loss	(212,667)			(171,550)			(333,468)	(337,214)
Accumulated Other Comprehensive Income (Loss)
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Other Comprehensive Income (Loss), Net of Tax	(241,091)	$ 47,124	$ 19,593	10,436	$ (2,280)	$ (8,470)	(174,374)
Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net loss	23,312			(37,233)			(82,852)	(112,725)
Interest rate swaps	333			1,092			1,884	(2,052)
Defined benefit pension plans	(4)			(15)			(12)	(57)
Foreign currency translation adjustment	(246,979)			9,359			(180,489)	1,795
Other Comprehensive Income (Loss), Net of Tax	(246,650)			10,436			(178,617)	(314)
Other comprehensive loss	(223,338)			(26,797)			(261,469)	(113,039)
Revision of Prior Period, Error Correction, Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net loss	5,112			(144,753)			(76,242)	(224,175)
Interest rate swaps	0						0
Defined benefit pension plans	0						0
Foreign currency translation adjustment	5,559						4,243
Other Comprehensive Income (Loss), Net of Tax	5,559						4,243
Other comprehensive loss	$ 10,671			$ (144,753)			$ (71,999)	$ (224,175)