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SHARE-BASED COMPENSATION (Deferred share unit plan Narrative) (Details) | 12 Months Ended |
--- | --- | ---
Dec. 29, 2019 USD ($) shares | Dec. 30, 2018 USD ($) shares | Dec. 31, 2017 shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Compensation expense included in selling, general and administrative expenses | $ 16,272,000 | $ 19,974,000 |
DSUs |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Minimum percentage of annual board retainer in the form of share-based payment arrangement | 50.00% |  |
Number of other equity instruments outstanding (in shares) | shares | 234,827 | 274,794 | 293,000
Other equity instruments outstanding amount | $ 6,900,000 | $ 8,300,000 |
Fair value per unit outstanding (in dollars per share) | 29.55 | 30.24 |
Compensation expense included in selling, general and administrative expenses | $ 1,800,000 | $ 1,700,000 |

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