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Capital Management - Bank EBITDA (Details) - CAD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020
Corporate Information And Statement Of IFRS Compliance [Abstract] |  |  |
Net income (loss) - basic |  | $ 1,613,600 | $ (2,438,964)
Financing and interest |  | 111,159 | 125,441
Unrealized foreign exchange (gain) loss |  | (1,905) | 9,232
Unrealized financial derivatives loss |  | 103,631 | 18,500
Current income tax expense |  | 1,272 | 574
Deferred income tax expense (recovery) |  | 79,968 | (160,967)
Depletion and depreciation |  | 464,580 | 486,380
Depletion and depreciation |  |  | 486,380
Gain on dispositions |  | (9,666) | (901)
Impairment (impairment reversal) | $ 2,588,488 | (1,542,414) | 2,360,220
Share-based compensation |  | 6,389 | 7,216
Exploration and evaluation |  | 15,212 | 14,011
Interest on lease obligations |  | (223) | (448)
Early redemption expense |  | (1,851) | (3,312)
Non-cash other income |  | $ (2,857) | $ (2,128)

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