EARNINGS PER SHARE - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income (loss) attributable to stockholders of common stock, basic	$ 9,962	$ 34,724	$ (4,107)	$ (14,906)
Net income (loss) attributable to stockholders of common stock, diluted	$ 9,962	$ 34,724	$ (4,107)	$ (14,906)
Weighted average shares used to calculate basic earnings (loss) per share (in shares)	86,002	49,478	81,088	47,585
Dilutive effect of stock options, restricted stock and performance units (in shares)	962	578	0	0
Weighted average shares used to calculate diluted earnings (loss) per share (in shares)	86,964	50,056	81,088	47,585
Basic earnings (loss) per share
Continuing operations (in dollars per share)	$ 0.12	$ 0.70	$ (0.05)	$ (0.35)
Discontinued operations (in dollars per share)	0	0	0	0.04
Basic earnings (loss) per share (in dollars per share)	0.12	0.70	(0.05)	(0.31)
Diluted earnings (loss) per share
Continuing operations (in dollars per share)	0.11	0.69	(0.05)	(0.35)
Discontinued operations (in dollars per share)	0	0	0	0.04
Diluted earnings (loss) per share (in dollars per share)	$ 0.11	$ 0.69	$ (0.05)	$ (0.31)
Continuing Operations
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income (loss) attributable to stockholders of common stock, basic	$ 9,962	$ 34,724	$ (4,107)	$ (16,706)
Discontinued Operations
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income (loss) attributable to stockholders of common stock, basic	$ 0	$ 0	$ 0	$ 1,800