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RISK AND CAPITAL MANAGEMENT: FINANCIAL INSTRUMENTS (Narrative) (Details) - CAD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Disclosure of detailed information about financial instruments [line items] |  |
Working capital | $ 75,178 | $ 88,902
Strategic investments | 4,613 | $ 33
Rawhide LLC |  |
Disclosure of detailed information about financial instruments [line items] |  |
Strategic investments | $ 4,580 |
Market Risk [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Potential change in market prices | 10.00% |
Value at risk | $ 9,700 |
Currency Risk [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Potential change in market prices | 10.00% |
Value at risk | $ 6,552 |

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