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Other income (expense) (Other income (expense)) (Details) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Other Income Expense [Abstract]    
Foreign exchange gains (losses) $ 74,132 $ 446
Government assistance 0 21,209
Bargain purchase gain [note 6] 22,802 0
Other 0 (302)
Total other income (expense) $ 96,934 $ 21,353