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NET INCOME (LOSS) PER SHARE (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 28, 2020
Jun. 30, 2019
Jun. 28, 2020
Jun. 30, 2019
Earnings Per Share [Abstract]        
Net income (loss) $ (8,168) $ 19,406 $ (158,662) $ 27,682
Weighted average number of common shares used in basic net income (loss) per common share 35,077 39,163 36,166 39,264
Dilutive effect of non-vested restricted stock 0 391 0 355
Weighted average number of common shares used in diluted net income (loss) per common share 35,077 39,554 36,166 39,619
Net income (loss) per common share:        
Basic (in dollars per share) $ (0.23) $ 0.50 $ (4.39) $ 0.71
Diluted (in dollars per share) $ (0.23) $ 0.49 $ (4.39) $ 0.70
Anti-dilutive shares 580 246 565 336