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INVESTMENTS (Details 1) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
DisclosureOfInvestmentsLineItems [Line Items]    
Investments, beginning $ 2,255 $ 45,166
Transfer from investment in associates at fair value (note 10) 10,423 0
Fair value changes through profit and loss (note 22) (1,085) (5,411)
Investments, ending 12,104 2,255
Equity instruments    
DisclosureOfInvestmentsLineItems [Line Items]    
Purchases, equity $ 511  
Debt instruments - GIC redemption    
DisclosureOfInvestmentsLineItems [Line Items]    
Sales, debt   $ (37,500)