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SHARE-BASED COMPENSATION (Stock options and restricted share units Narrative) (Details)
$ / shares in Units, $ in Thousands
 12 Months Ended
Jan. 02, 2022
shares
$ / shares
Jan. 02, 2022
USD ($)
gal
shares
$ / shares
Jan. 03, 2021
shares
$ / shares
Jan. 03, 2021
USD ($)
shares
Jan. 02, 2022
shares
$ / shares
Jan. 03, 2021
shares
$ / shares
Disclosure of terms and conditions of share-based payment arrangement [line items]            
Number of common shares issuable pursuant to the exercise of stock options and vesting of Treasury RSUs for the plan (in shares) 12,000,632       12,000,632  
Number of shares remained authorized for future issuance under the plan (in shares) 132,596       132,596  
Outstanding options exercisable (in shares)     1,304,338     1,304,338
Weighted average exercise price of share options exercisable in share-based payment arrangement | $ / shares $ 36.85   $ 36.73      
Weighted average share price for share options in share-based payment arrangement exercised during period at date of exercise | (per share) $ 48.12 $ 40.58 $ 30.48      
Weighted average fair value of options granted (in dollars per share) | $ / shares   $ 5.09        
Compensation expense included in selling, general and administrative expenses and cost of sales | $   $ 37,660   $ 1,954    
Shares granted (in shares)       1,387,000    
Exercise price, share options granted | $ / shares   $ 26.43        
Stock Appreciation Rights            
Disclosure of terms and conditions of share-based payment arrangement [line items]            
Weighted average fair value of options granted (in dollars per share) | $ / shares   $ 5.60        
Compensation expense included in selling, general and administrative expenses and cost of sales | $   $ 1,500   $ 100    
Shares granted (in shares) | gal   824,406        
Exercise price, share options granted | $ / shares   $ 30        
Vesting period   2 years        
Number of outstanding shares vested (in shares) | gal   0        
Treasury RSUs            
Disclosure of terms and conditions of share-based payment arrangement [line items]            
Compensation expense included in selling, general and administrative expenses and cost of sales | $   $ (200)   $ 600    
Vesting period   5 years        
Number of outstanding shares vested (in shares)   0   0    
Percentage of awards contingent on achievement of performance conditions   50.00%        
Stock options            
Disclosure of terms and conditions of share-based payment arrangement [line items]            
Compensation expense included in selling, general and administrative expenses and cost of sales | $   $ 2,800   $ 1,800    
Non-Treasury RSUs            
Disclosure of terms and conditions of share-based payment arrangement [line items]            
Compensation expense included in selling, general and administrative expenses and cost of sales | $   $ 33,300   $ (500)    
Vesting period   3 years        
Number of outstanding shares vested (in shares)   0   0    
Ratio of awards that can vest to the actual number of shares awarded   2        
CAD            
Disclosure of terms and conditions of share-based payment arrangement [line items]            
Outstanding options exercisable (in shares) 1,235,845       1,235,845  
USD            
Disclosure of terms and conditions of share-based payment arrangement [line items]            
Outstanding options exercisable (in shares) 433,962   334,448   433,962 334,448
Weighted average exercise price of share options exercisable in share-based payment arrangement | $ / shares         $ 29.01 $ 29.01