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Income taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Total deferred tax assets | $ 53,903 | $ 48,191
Deferred tax liabilities | 152,115 | 142,568
Net deferred tax liabilities | 98,212 | 94,377
Provisions and accrued expenses |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Total deferred tax assets | 20,941 | 21,138
Lease liabilities |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Total deferred tax assets | 18,114 | 17,352
Accounts receivable valuation |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Total deferred tax assets | 2,297 | 2,814
Inventory valuation and costing |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Total deferred tax assets | 2,457 | 1,781
Retirement benefit obligations |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Total deferred tax assets | 1,344 | 1,142
Unrealized loss on derivative instruments |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Total deferred tax assets | 2,312 | 828
Other |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Total deferred tax assets | 6,438 | 3,136
Deferred tax liabilities | 7,267 | 9,935
Property, plant and equipment |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax liabilities | 58,005 | 47,677
Goodwill |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax liabilities | 45,920 | 45,920
Mineral deposits |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax liabilities | 19,498 | 19,492
Right-of-use assets |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax liabilities | 18,114 | 16,282
Intangible assets |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax liabilities | $ 3,311 | $ 3,262

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- Definition The amounts of income taxes recoverable in future periods in respect of: (a) deductible temporary differences; (b) the carryforward of unused tax losses; and (c) the carryforward of unused tax credits. [Refer: Temporary differences [member]; Unused tax credits [member]; Unused tax losses [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2024-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_81_g_i&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 54 -Subparagraph o -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_o&doctype=Standard -URIDate 2024-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 56 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_56&doctype=Standard -URIDate 2024-03-27 + Details
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