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Income taxes - Disclosure of reconciliation of statutory weighted average tax rate applicable to income (Details) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Major components of tax expense (income) [abstract] |  |
(Loss) earnings from continuing operations before income taxes | $ (35,086) | $ 113,123
Income tax provision on continuing operations calculated using the combined Canadian federal and provincial statutory income tax rate | (9,298) | 29,978
Increase (decrease) in income taxes resulting from: |  |
Non-deductible expenses, net | 97 | 335
Non-taxable portion of capital losses, net | 13,179 | 3,422
Differences in foreign statutory tax rates | 1,100 | (4,056)
Changes in unrecognized deferred tax assets | 9,868 | (367)
Foreign withholding taxes | 283 | 482
Adjustments in respect of prior years | (2,289) | (2,716)
Other | 317 | 760
Total income tax expense on continuing operations | $ 13,257 | $ 27,838

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