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NET INCOME PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Oct. 01, 2017	Jul. 02, 2017	Apr. 02, 2017	Jan. 01, 2017	Sep. 23, 2016	Jun. 24, 2016	Mar. 25, 2016	Dec. 31, 2017	Jan. 01, 2017	Dec. 25, 2015
Earnings Per Share [Abstract]
Net income (loss)	$ 16,427	$ 21,221	$ 13,134	$ 4,674	$ 18,087	$ 23,429	$ (63,735)	$ 6,968	$ 55,456	$ (15,251)	$ 71,247
Weighted average number of common shares used in basic net income (loss) per common share									41,202	41,648	41,226
Dilutive effect of non-vested restricted stock									239	0	396
Weighted average number of common shares used in diluted net income (loss) per common share									41,441	41,648	41,622
Net income (loss) per common share:
Basic (in dollars per share)	$ 0.41	$ 0.52	$ 0.32	$ 0.11	$ 0.43	$ 0.56	$ (1.53)	$ 0.17	$ 1.35	$ (0.37)	$ 1.73
Diluted (in dollars per share)	$ 0.40	$ 0.51	$ 0.31	$ 0.11	$ 0.43	$ 0.56	$ (1.53)	$ 0.17	$ 1.34	$ (0.37)	$ 1.71
Anti-dilutive shares									418	0	89

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