Unaudited condensed consolidated statements of comprehensive loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net loss	$ (137,933)	$ (163,324)	$ (220,327)	$ (396,234)
Other comprehensive income (loss), net of tax of nil:
Foreign currency translation adjustments	30,325	(5,241)	28,132	(2,341)
Comprehensive loss	$ (107,608)	$ (168,565)	$ (192,195)	$ (398,575)