Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Condensed Consolidated Statements of Comprehensive Loss (Unaudited)
Net loss	$ (23,108)	$ (85,282)	$ (99,430)	$ (221,437)
Other comprehensive income (loss), net of tax
Foreign currency translation adjustments	(3,165)	1,978	(3,369)	4,588
Unrealized pension actuarial gains (losses), net of tax	147	824	(58)	1,934
Total other comprehensive loss, net of tax	$ (26,126)	$ (82,480)	$ (102,857)	$ (214,915)