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EQUITY (Normal course issuer bid Narrative) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Feb. 19, 2020
Aug. 01, 2018
Feb. 21, 2018
Dec. 29, 2019
Dec. 30, 2018
Feb. 20, 2019
Disclosure of classes of share capital [line items]            
Number of shares authorized to be repurchased (in shares) 9,939,154 21,575,671 10,960,391     10,337,017
Number of shares authorized to be repurchased as a percentage of issued and outstanding common shares 5.00% 10.00% 5.00%      
Shares repurchased for cancellation (in shares)       8,217,715 12,634,693  
Shares repurchased for cancellation       $ 257,233 $ 367,529  
Stock Repurchase Program, Maximum Shares To Be Repurchased Daily 149,602          
Average Daily Trading Volume, Percentage 25.00%          
Number of shares in entity held by entity or by its subsidiaries or associates       9,206 3,797  
Value of shares in entity held by entity or by its subsidiaries or associates       $ 200 $ 100  
Share capital            
Disclosure of classes of share capital [line items]            
Shares repurchased for cancellation (in shares)       8,218,000 12,635,000  
Shares repurchased for cancellation       $ 6,738 $ 9,231  
Retained earnings            
Disclosure of classes of share capital [line items]            
Shares repurchased for cancellation       $ 250,495 $ 358,298