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INTANGIBLE ASSETS AND GOODWILL (Recoverability of cash-generating units) (Details) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 29, 2020
Jan. 03, 2021
Dec. 29, 2019
Dec. 30, 2018
Disclosure of information for cash-generating units [line items]        
Goodwill   $ 206,636,000 $ 227,865,000  
Intangible assets (note 10)   289,901,000 383,864,000 $ 383,864,000
Impairments $ 94,000,000.0 93,989,000 0  
Cash-generating units        
Disclosure of information for cash-generating units [line items]        
Impairments   0    
Cash-generating units | Branded Apparel        
Disclosure of information for cash-generating units [line items]        
Goodwill   206,636,000 206,636,000  
Intangible assets (note 10)   27,869,000 33,066,000  
Indefinite life intangible assets   93,400,000 93,400,000  
Intangible assets and goodwill   327,905,000 333,102,000  
Cash-generating units | Printwear        
Disclosure of information for cash-generating units [line items]        
Goodwill   0 21,229,000  
Intangible assets (note 10)   63,230,000 101,906,000  
Indefinite life intangible assets   86,129,000 129,272,000  
Intangible assets and goodwill   $ 149,359,000 $ 252,407,000