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Income Taxes (Earnings and income taxes by jurisdiction) (Details) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Disclosure of geographical areas [line items] |  |
Earnings (loss) before income taxes | $ 84,795 | $ (103,855)
Current income taxes | 7,673 | 4,247
Deferred income tax recovery | (12,142) | (5,448)
Income tax expense (recovery) | (4,469) | (1,201)
Canada [member] |  |
Disclosure of geographical areas [line items] |  |
Earnings (loss) before income taxes | 99,944 | 58,624
Current income taxes | 2,260 | 2,257
Deferred income tax recovery | (10,178) | (3,937)
Foreign [member] |  |
Disclosure of geographical areas [line items] |  |
Earnings (loss) before income taxes | (15,149) | (162,479)
Current income taxes | 5,413 | 1,990
Deferred income tax recovery | $ (1,964) | $ (1,511)

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