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Income taxes - Expense (benefit) (Details) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Income Tax Disclosure [Abstract] |  |
Income before income taxes | $ 60,035 | $ 85,963
Equity earnings in affiliates and joint ventures | (15,299) | (25,199)
Income (loss) from continuing operations | $ 44,736 | $ 60,764
Tax rate | 23.00% | 23.00%
Expected expense | $ 10,289 | $ 13,976
Adjustments related to: |  |
Stock-based compensation | 1,241 | 1,092
Foreign tax rate differential | 2,463 | 2,164
Tax on equity earnings in affiliates and joint ventures | 3,519 | 5,794
Other | (1,562) | (204)
Total income tax expense | 15,950 | 22,822
Current income tax expense | (3,280) | 6,841
Deferred income tax expense | $ 19,230 | $ 15,981

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