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Income Taxes - components of income tax expense (Details) - CAD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Income Taxes      
Current taxes $ (1,350) $ (215) $ (95)
Deferred taxes 7,557 (2,074) (4,798)
Resource property revenue taxes (5,658) (7,887) (6,074)
Provision for income taxes $ 549 $ (10,176) $ (10,967)