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NET INCOME PER SHARE (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 23, 2016
Sep. 25, 2015
Sep. 23, 2016
Sep. 25, 2015
Earnings Per Share [Abstract]        
Net income (loss) $ 23,429 $ 20,090 $ (33,338) $ 43,079
Weighted average number of common shares used in basic net income (loss) per common share 41,762 41,296 41,651 41,189
Dilutive effect of non-vested restricted stock 294 324 0 357
Weighted average number of common shares used in diluted net income (loss) per common share 42,056 41,620 41,651 41,546
Net income (loss) per common share:        
Basic (in dollars per share) $ 0.56 $ 0.49 $ (0.80) $ 1.05
Diluted (in dollars per share) $ 0.56 $ 0.48 $ (0.80) $ 1.04
Anti-dilutive shares 302 91 521 227