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INVESTMENTS (Details) - CAD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | ---
DisclosureOfInvestmentsLineItems [Line Items] |  |  |
Current investments | $ 0 | $ 37,807 | $ 0
Noncurrent investments | 2,255 | 7,359 | 5,049
Total investments | 2,255 | 45,166 | 5,049
Debt instruments-fair value through profit and loss |  |  |
DisclosureOfInvestmentsLineItems [Line Items] |  |  |
Total investments | 0 | 37,807 | 0
Equity instruments-fair value through profit and loss |  |  |
DisclosureOfInvestmentsLineItems [Line Items] |  |  |
Total investments | $ 2,255 | $ 7,359 | $ 5,049

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