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Other Operating Gains (Losses), Net - Schedule of Other Operating Gains (Losses), Net (Details) - CAD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Other Operating Gains (Losses), Net [Abstract]    
Insurance proceeds and other $ 2,102 $ 3,950
Gain on disposal of assets 20
Impairment (84,469)
Other operating gains (losses), net $ (82,347) $ 3,950