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Exploration and Evaluation Assets - Schedule of Assets (Details) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Exploration and evaluation assets, beginning of year $ 90,919  
Exploration and evaluation expense (779) $ (8,896)
Exploration and evaluation assets, end of year 124,355 90,919
Exploration and evaluation assets    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Exploration and evaluation assets, beginning of year 90,919 168,684
Property acquisitions 39,355 19,519
Divestitures (2,009) (2,998)
Exploration and evaluation expense (779) (8,896)
Transfers to oil and gas properties (3,131) (83,530)
Foreign currency translation 0 (1,860)
Exploration and evaluation assets, end of year $ 124,355 $ 90,919