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SHARE-BASED COMPENSATION (Employee share purchase plans) (Details)
$ in Thousands
 12 Months Ended
Dec. 30, 2018
USD ($)
shares
Dec. 31, 2017
USD ($)
shares
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Compensation expense included in selling, general and administrative expenses | $ $ 19,974 $ 16,065
Employee share purchase plan    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Percentage of payroll deductions from salary to purchase from Treasury (up to) 10.00%  
Share price as a percentage of current share price 90.00%  
Service period for share-based compensation plan 2 years  
Common shares reserved for issuance under the plans (in shares) | shares 5,000,000  
Number of shares issued (in shares) | shares 910,159 852,255
Compensation expense included in selling, general and administrative expenses | $ $ 200 $ 200