CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS
Net loss	$ (881,708)	$ (2,003,815)	$ (1,457,816)
Other comprehensive (loss) income, net of tax of nil:
Foreign currency translation adjustments	(25,464)	(90,421)	13,714
Pension liability adjustments, net	(5,611)	365	1,865
Unrealized holding loss, net	9,046	(5,311)	(4,571)
Comprehensive loss	$ (903,737)	$ (2,099,182)	$ (1,446,808)