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NET INCOME (LOSS) PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2021	Sep. 27, 2020	Sep. 26, 2021	Sep. 27, 2020
Earnings Per Share [Abstract]
Net income (loss)	$ 18,642	$ 8,795	$ 41,424	$ (149,867)
Weighted average number of common shares used in basic net income (loss) per common share	34,873	34,597	34,788	35,643
Dilutive effect of non-vested stock-based awards	602	307	467	0
Weighted average number of common shares used in diluted net income (loss) per common share	35,475	34,904	35,255	35,643
Net income (loss) per common share:
Basic (in dollars per share)	$ 0.53	$ 0.25	$ 1.19	$ (4.20)
Diluted (in dollars per share)	$ 0.53	$ 0.25	$ 1.17	$ (4.20)
Anti-dilutive shares	24	595	47	1,006

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