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Financial Instruments - Interest rate risk sensitivity analysis (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
CAD ($)
Financial Instruments  
Decrease in other comprehensive loss from continuing operations if equity prices strengthened 10% with all other variables held constant $ 330
Bottom of range | Interest rate risk  
Financial Instruments  
Increase in Loss from continuing operations if 1% benchmark interest rate is higher with all other variables held constant 660
Decrease in Loss from continuing operations 1% if benchmark interest rate is lower with all other variables held constant 574
Bottom of range | Other price risk  
Financial Instruments  
Increase in Loss from continuing operations if equity prices weakened 10% with all other variables held constant 330
Top of range | Other price risk  
Financial Instruments  
Increase in other comprehensive loss from continuing operations if equity prices weakened 10% with all other variables held constant $ 330