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Income Taxes (Earnings and income taxes by jurisdiction) (Details) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Disclosure of geographical areas [line items]    
Earnings (loss) before income taxes $ 84,795 $ (103,855)
Current income taxes 7,673 4,247
Deferred income tax recovery (12,142) (5,448)
Income tax expense (recovery) (4,469) (1,201)
Canada [member]    
Disclosure of geographical areas [line items]    
Earnings (loss) before income taxes 99,944 58,624
Current income taxes 2,260 2,257
Deferred income tax recovery (10,178) (3,937)
Foreign [member]    
Disclosure of geographical areas [line items]    
Earnings (loss) before income taxes (15,149) (162,479)
Current income taxes 5,413 1,990
Deferred income tax recovery $ (1,964) $ (1,511)