INCOME TAXES - Components of Pre-Tax Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Domestic	$ (240,064)	$ (34,720)	$ (90,822)
Foreign	(11,854)	1,867	(3,387)
Loss before income taxes	$ (251,918)	$ (32,853)	$ (94,209)