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INCOME TAXES (Details of income tax expense) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Jan. 01, 2017
Current tax expense (income) and adjustments for current tax of prior periods [abstract] |  |
Current income taxes, includes a recovery of $2,725 (2015 - expense of $3,904) relating to prior taxation years | $ 9,587 | $ 8,356
Adjustments for recovery relating to prior taxation years | 1,368 | 2,725
Reduction in tax rate | (1,633) | 0
Revaluation of deferred taxes on intangible assets | (62,228) | 0
Origination and reversal of temporary differences | 6,576 | (1,059)
Non-recognition of tax benefits related to tax losses and temporary differences | 62,488 | 0
Recognition of tax benefits relating to prior taxation years | (308) | (2,097)
Deferred income taxes | 4,895 | (3,156)
Total income tax expense | $ 14,482 | $ 5,200

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