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Interests in Resource Properties (Details) - CAD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Interests in Resource Properties      
Interests in resource properties $ 201,802 $ 254,706  
Interest in an iron ore development project      
Interests in Resource Properties      
Interests in resource properties 201,802 206,439  
Hydrocarbon development and production assets      
Interests in Resource Properties      
Interests in resource properties   31,260  
Hydrocarbon Probable Reserves      
Interests in Resource Properties      
Interests in resource properties 0 12,367 $ 12,367
Hydrocarbon Undeveloped lands      
Interests in Resource Properties      
Interests in resource properties $ 0 $ 4,640 $ 4,640