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INCOME TAXES INCOME TAXES - Unrecognized Tax Benefits Roll Forward (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Jan. 01, 2017
Dec. 25, 2015
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Balance, beginning of fiscal year $ 2,242 $ 2,195 $ 2,039
Increases for tax positions related to the current year 356 348 436
Reductions due to lapsed statute of limitations (388) (301) (280)
Balance, end of fiscal year $ 2,210 $ 2,242 $ 2,195