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Asset Retirement Obligations - Changes In Asset Retirement Obligations (Details) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Reconciliation of changes in other provisions [Abstract] |  |
Accretion | $ 15,683 | $ 12,381
Government grants | (4,009) | (2,857)
Less current portion of asset retirement obligations | 12,813 | 11,080
Non-current portion of asset retirement obligations | 576,110 | 732,603
Asset retirement obligation |  |
Reconciliation of changes in other provisions [Abstract] |  |
Balance, beginning of the year | 743,683 | 760,383
Liabilities incurred | 19,942 | 14,845
Liabilities settled | (18,351) | (6,662)
Liabilities acquired from property acquisitions | 950 | 249
Liabilities divested | (3,464) | (3,161)
Proceeds from dispositions | 0 | (4,113)
Accretion | 15,683 | 12,381
Government grants | (4,009) | (2,857)
Change in estimate | 6,124 | (9,686)
Changes in discount rates and inflation rates | (173,086) | (17,381)
Foreign currency translation | 1,451 | (315)
Balance, end of the year | $ 588,923 | $ 743,683

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