CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net loss	$ (55,951)	$ (129,633)
Other comprehensive income (loss), net of tax:
Interest rate swaps	1,340	(2,890)
Defined benefit pension plans	(4)	(67)
Foreign currency translation adjustment	18,257	(5,513)
Total other comprehensive income (loss), net of tax	19,593	(8,470)
Comprehensive loss	$ (36,358)	$ (138,103)