(LOSS) EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Numerator:
Net income	$ (7,111)	$ 36,200	$ 3,816	$ 49,223
Denominator:
Weighted average basic shares (in shares)	50,655,154	53,253,455	50,870,735	46,103,264
Dilutive potential common shares (in shares)	0	263,000	40,000	335,000
Weighted average fully diluted shares (in shares)	50,655,154	53,516,000	50,910,790	46,438,173
(Loss) earnings per share:
Basic (in dollars per share)	$ (0.14)	$ 0.68	$ 0.08	$ 1.07
Diluted (in dollars per share)	$ (0.14)	$ 0.68	$ 0.07	$ 1.06
Outstanding common stock equivalents having no dilutive effect (in shares)	48,000	1,000	15,000	1,000
Securities excluded from computation of earnings per share, (in shares)	14,000