Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Condensed Consolidated Statements of Comprehensive Loss
Net loss	$ (30,886)	$ (79,199)	$ (76,322)	$ (136,155)
Other comprehensive income (loss), net of tax
Foreign currency translation adjustments	1,901	1,133	(204)	2,610
Unrealized pension actuarial gains (losses), net of tax	(116)	802	(205)	1,110
Total other comprehensive loss, net of tax	$ (29,101)	$ (77,264)	$ (76,731)	$ (132,435)