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SUPPLEMENTARY INFORMATION RELATING TO THE NATURE OF EXPENSES (Selling, general and administrative expenses) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 30, 2018
Dec. 31, 2017
Analysis of income and expense [abstract]    
Selling expenses $ 108,363 $ 118,560
Administrative expenses 135,735 141,325
Distribution expenses 124,448 117,438
Selling, general and administrative expenses $ 368,546 $ 377,323