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INCOME TAXES (Significant components of deferred income tax assets and liabilities) (Details) - USD ($) $ in Thousands | Dec. 30, 2018 | Dec. 31, 2017 | Jan. 01, 2017
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Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Unrecognized deferred income tax assets | $ (85,700) | $ (67,200) |
Deferred tax liabilities | (12,623) | (3,713) |
Deferred income taxes | (12,623) | (3,713) | $ 1,500
Before Offset Amount [Member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Unrecognized deferred income tax assets | (85,724) | (67,152) |
Net deferred tax assets | 26,737 | 30,231 |
Deferred tax liabilities | (39,360) | (33,944) |
Deferred income taxes | (12,623) | (3,713) |
Before Offset Amount [Member] | Temporary differences |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Deferred tax assets | 112,461 | 97,383 |
Before Offset Amount [Member] | Non-capital losses |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Deferred tax assets | 85,800 | 75,433 |
Before Offset Amount [Member] | Non-deductible reserves and accruals |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Deferred tax assets | 11,395 | 5,712 |
Before Offset Amount [Member] | Property, plant and equipment |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Deferred tax assets | 9,227 | 9,629 |
Deferred tax liabilities | (29,095) | (24,239) |
Before Offset Amount [Member] | Other |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Deferred tax assets | 6,039 | 6,609 |
Before Offset Amount [Member] | Intangible assets |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Deferred tax liabilities | $ (10,265) | $ (9,705) |

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