NET INCOME (LOSS) PER SHARE - Schedule of Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Basic net income (loss) per share
Net (loss) income	$ (34,499)	$ 41,230	$ (13,605)	$ (14,301)	$ 6,731	$ (27,906)
Weighted average common shares and warrants outstanding (in shares)	98,558		64,480		89,835	64,405
Basic net (loss) income per share (in dollars per share)	$ (0.35)		$ (0.21)		$ 0.07	$ (0.43)
Diluted net income (loss) per share
Add: effect of dilutive stock options, awards, and equivalents (in shares)	0		0		401	0
Denominator for diluted income (loss) per share (in shares)	98,558		64,480		90,236	64,405
Diluted net loss per share (in dollars per share)	$ (0.35)		$ (0.21)		$ 0.07	$ (0.43)