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SUPPLEMENTAL CASH FLOW DISCLOSURE (Adjustments to reconcile net earnings to cash flows from operating activities) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Jan. 01, 2017
Cash flow statement [Abstract] |  |
Depreciation and amortization (note 20) | $ 162,150 | $ 140,597
Restructuring charges related to property, plant and equipment (note 17) | 930 | 1,716
Gain on remeasurement of contingent consideration in connection with a business acquisition (note 17) | 0 | (6,176)
Loss on disposal of property, plant and equipment and intangible assets | 368 | 1,631
Share-based compensation | 15,867 | 15,373
Deferred income taxes (note 18) | 4,895 | (3,156)
Unrealized net (gain) loss on foreign exchange and financial derivatives | (863) | 1,993
Timing differences between settlement of financial derivatives and transfer of deferred gains and losses in accumulated OCI to net earnings | (10,070) | 10,840
Other non-current assets | (523) | (2,202)
Other non-current liabilities | 2,445 | (2,169)
Adjustments to reconcile net earnings to cash flows from operating activities (note 21(a)) | $ 175,199 | $ 158,447

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