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Income Taxes - Schedule of Reconciliation of the Statutory Income Tax Rate (Details) - CAD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Schedule of Reconciliation of the Statutory Income Tax Rate [Abstract]        
Income (loss) before tax $ (137,904) $ 73,006 $ (109,116) $ 184,956
Multiplied by the statutory income tax rates 26.39% 26.40% 26.39% 26.40%
Statutory income tax rate $ (36,393) $ 19,274 $ (28,796) $ 48,828
Income tax recorded at rates different from the Canadian tax rate (521) (578) (5,216) (8,452)
Permanent differences 9,581 (8,626) 12,615 (10,895)
Effect of temporary differences not recognized as deferred tax assets 16,984 (5,568) 4,217 12,994
Foreign taxes (36) (170)
Change in estimates related to prior periods 36 (293) 126 (255)
Foreign exchange (6,569) 1,065 4,608 (1,972)
Other 97 (110) 511 (56)
Tax expense (recovery) $ (16,821) $ 5,164 $ (12,105) $ 40,192
Effective income tax rate 12.20% 7.07% 11.09% 21.73%