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Derivative financial instruments - Additional information (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of derivative financial instruments [Line Items] |  |  |
Hedge operations | $ 12,774,000 | $ (51,952,000) | $ (6,464,000)
Unrealized gain (loss) before tax | 10,696,000 | 6,678,000 | (11,142,000)
Hedge ineffectiveness | 454,000 | 1,403,000 | (1,857,000)
Effect on settlement of hedging financial instruments | 818,000 | 1,547,000 | 146,000
Interest rate hedge |  |  |
Disclosure of derivative financial instruments [Line Items] |  |  |
Unrealized gain (loss) before tax | 644,000 | 1,991,000 | (2,635,000)
Effect on settlement of hedging financial instruments | 818,000 | (1,547,000) | (146,000)
Unrealized gain (loss) net of tax income | 454,000 | 1,404,000 | (1,858,000)
Copper and Zinc prices hedge |  |  |
Disclosure of derivative financial instruments [Line Items] |  |  |
Unrealized gain (loss) before tax | 15,171,000 | 9,472,000 | 15,804,000
Balance payable |  | 1,200,000 |
Balance receivable | 2,500,000 |  |
Unrealized gain (loss) net of tax income | 10,696,000 | 6,678,000 | 11,142,000
Other reserves [member] | Copper and Zinc prices hedge |  |  |
Disclosure of derivative financial instruments [Line Items] |  |  |
Hedge operations | $ 12,774,000 | $ (51,952,000) | $ (6,464,000)

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- Definition The amount of closed hedging financial instruments accounts payable. + References No definition available. + Details
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- Definition The amount of closed hedging financial instruments receivable. + References No definition available. + Details
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- Definition Represents the finance cost related to settlement of hedging financial instruments. + References No definition available. + Details
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- Definition The gain (loss) recognised in other comprehensive income on hedge ineffectiveness. [Refer: Gain (loss) on hedge ineffectiveness] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 24C -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_24C_a_i&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of other comprehensive income, before tax, after reclassification adjustments, related to cash flow hedges. [Refer: Cash flow hedges [member]; Other comprehensive income, before tax] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 91 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_91_b&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 7 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_7&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of other comprehensive income, net of tax, after reclassification adjustments, related to cash flow hedges. [Refer: Cash flow hedges [member]; Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 91 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_91_a&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 7 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_7&doctype=Standard -URIDate 2022-03-24 + Details
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