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EMPLOYEE BENEFIT PLANS - Deferred Compensation (Details) - Executive - Deferred Bonus - USD ($)
12 Months Ended
Dec. 27, 2017
Dec. 28, 2016
Dec. 25, 2013
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]      
Deferred compensation award due to executive     $ 2,450,000
Deferred compensation expense $ 0 $ 0 $ 2,054,000