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Income taxes (Tax rate reconciliation) (Details) - CAD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Reconciliation Of Accounting Profit Multiplied By Applicable Tax Rates [Abstract] |  |
Earnings before income taxes | $ 256,716 | $ 487,153
Combined federal and provincial tax rate | 26.90% | 26.90%
Computed income tax expense | $ 69,057 | $ 131,044
Increase (decrease) in taxes resulting from: |  |
Difference between Canadian rates and rates applicable to subsidiaries in other countries | (4,482) | 2,990
Change in unrecognized deferred tax assets | 75,923 | 16,759
Non taxable portion of capital loss | 6,775 | 0
Loss (Income) in equity-accounted investees | (60,343) | (41,519)
Change in uncertain tax positions | 0 | (9,331)
Other taxes | 15,453 | 11,709
Foreign exchange permanent differences | (14,939) | 12,044
Other permanent differences | (2,570) | 2,641
Income tax expense | $ 84,874 | $ 126,337

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- Definition The amount of profit (loss) for a period before deducting tax expense. [Refer: Profit (loss)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2024-01-01 -Paragraph 81 -Subparagraph c -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_81_c_i&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2024-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that the entity does not separately disclose in the same statement or note. [Refer: Accounting profit; Applicable tax rate] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2024-01-01 -Paragraph 81 -Subparagraph c -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_81_c_i&doctype=Standard -URIDate 2024-03-27 + Details
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