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FINANCIAL RISK MANAGEMENT - Currency Risk Positions (Details) - Currency risk $ in Thousands | Dec. 31, 2019 CAD ($) $ / $ | Dec. 31, 2018 CAD ($) $ / $
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Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |
Notional amount | $ | $ 30,000 | $ 54,140
Estimated usage | 40.30% | 71.20%
Hedging price ($/gallon and $/litre) |  | 1.36
Floor price |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |
Hedging price ($/gallon and $/litre) | 1.2614 | 1.2500
Cap price |  |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |  |
Hedging price ($/gallon and $/litre) | 1.3710 | 1.3348

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