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
CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS [Abstract]
Net loss	$ (85,290)	$ (105,135)	$ (209,613)	$ (170,300)
Unrealized gains (losses) on debt securities, net of tax	(2,000)	(5,018)	6,393	(20,774)
Currency translation adjustment	70	(411)	174	(565)
Comprehensive loss	$ (87,220)	$ (110,564)	$ (203,046)	$ (191,639)