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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

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