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Capital Management - Bank EBITDA (Details) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Corporate Information And Statement Of IFRS Compliance [Abstract]    
Net income - basic $ 855,605 $ 1,613,600
Financing and interest 104,817 111,159
Unrealized foreign exchange loss (gain) 45,073 (1,905)
Unrealized financial derivatives (gain) loss (135,471) 103,631
Current income tax expense 3,594 1,272
Deferred income tax expense 31,716 79,968
Depletion and depreciation 587,050 464,580
Gain on dispositions (4,898) (9,666)
Impairment reversal (267,744) (1,542,414)
Share-based compensation 3,159 6,389
Exploration and evaluation 30,239 15,212
Interest on lease obligations (193) (223)
Early redemption expense (2,462) (1,851)
Non-cash other income $ (4,009) $ (2,857)