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INCOME TAXES (Details 3) - CAD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
DisclosureOfDeferredIncomeTaxLiabilitiesLineItems [Line Items] |  |
Deferred income tax liability, beginning | $ (17,422) | $ (20,168)
Recognized in income (loss) | 8,294 | 5,166
Deferred income tax liability, ending | (12,963) | (17,422)
Deferred income tax liability |  |
DisclosureOfDeferredIncomeTaxLiabilitiesLineItems [Line Items] |  |
Deferred income tax liability, beginning | (17,422) | (20,168)
Recognized in income (loss) | 8,294 | 5,166
Recognized in other liabilities (flow-through shares) | (3,835) | (2,420)
Deferred income tax liability, ending | $ (12,963) | $ (17,422)

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