INCOME TAXES - Schedule of Provision for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal									$ 0	$ 0	$ 0
State									636	327	42
Foreign									1,896	1,589	1,233
Total									2,532	1,916	1,275
Deferred:
Federal									(13,445)	(56,959)	(35)
State									(3,672)	(17,458)	(21)
Foreign									0	1,467	179
Total									(17,117)	(72,950)	123
Income taxes (benefit) provision	$ (1,639)	$ 5,483	$ (6,561)	$ (11,868)	$ (72,245)	$ 272	$ 591	$ 348	$ (14,585)	$ (71,034)	$ 1,398