EARNINGS (LOSS) PER SHARE - Summary (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Net income (loss)	$ 5,094	$ (56,421)
Basic weighted-average common shares outstanding (shares)	17,545	17,336
Effect of dilutive options and restricted stock awards (shares)	343	0
Diluted weighted-average common shares outstanding (shares)	17,888	17,336
Earnings (loss) per share:
Basic (USD per share)	$ 0.29	$ (3.25)
Diluted (USD per share)	$ 0.28	$ (3.25)