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EARNINGS PER SHARE (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Basic:        
Net income (loss) available to common stockholders $ (33,929) $ (127,316) $ (67,304) $ (12,825)
Weighted average basic number of common shares outstanding 16,268 16,204 16,250 16,204
Basic net income (loss) per share of common share (in dollars per share) $ (2.09) $ (7.86) $ (4.14) $ (0.79)
Diluted:        
Net Income (Loss) Available to Common Stockholders, Diluted $ (33,929) $ (127,316) $ (67,304) $ (12,825)
Net income (loss) available to common stockholders (33,929) (127,316) (67,304) (12,825)
Net income (loss) diluted $ (33,929) $ (127,316) $ (67,304) $ (12,825)
Weighted average basic number of common shares outstanding 16,268 16,204 16,250 16,204
Weighted average diluted number of common shares outstanding 16,268 16,204 16,250 16,204
Diluted net income (loss) per share of common stock (in dollars per share) $ (2.09) $ (7.86) $ (4.14) $ (0.79)
Common stock equivalents excluded from computation of diluted earnings per share of common stock because of anti-dilutive effect 7,700 7,800 7,700 7,600