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Note 8 - Equity in earnings of non-consolidated companies (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of Equity in Earnings of Nonconsolidated Companies [Line Items] |  |  |
Earnings from non-consolidated companies | $ 8,548 | $ 79,411 |
Bargain purchase gain | 2,212 | 3,162 |
Impairment loss on non-consolidated companies |  |  | (34,041)
Equity in earnings of non-consolidated companies | 8,548 | 95,404 | 208,702
Net of Effect Participation Increase [Member] |  |  |
Disclosure of Equity in Earnings of Nonconsolidated Companies [Line Items] |  |  |
Earnings from non-consolidated companies | 8,548 | 104,897 | 242,743
Usiminas |  |  |
Disclosure of Equity in Earnings of Nonconsolidated Companies [Line Items] |  |  |
Impairment loss on non-consolidated companies |  |  | (19,100)
Net loss related to participation increase in Usiminas |  | (25,500) |
Usiminas | Effect Participation Increase [Member] |  |  |
Disclosure of Equity in Earnings of Nonconsolidated Companies [Line Items] |  |  |
Net loss related to participation increase in Usiminas |  | (25,486) |
Global Pipe Company [Member] |  |  |
Disclosure of Equity in Earnings of Nonconsolidated Companies [Line Items] |  |  |
Remeasurement of previously held interest |  | 4,506 |
Bargain purchase gain |  | $ 11,487 |

X
- Definition The gain (loss) recognised as result of remeasuring to fair value the equity interest in the acquiree held by the acquirer before the business combination. [Refer: Total for all business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2024-01-01 -Paragraph B64 -Subparagraph p -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2024-en-r&anchor=para_B64_p_ii&doctype=Appendix&subtype=B -URIDate 2024-03-27 + Details
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- Definition The amount of any gain recognised in a business combination in which the net of the identifiable assets acquired and the liabilities assumed exceeds the aggregate of the consideration transferred, non-controlling interest in the acquiree and fair value of the acquirer's previously held equity interest in the acquiree. [Refer: Total for all business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2024-01-01 -Paragraph B64 -Subparagraph n -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2024-en-r&anchor=para_B64_n_i&doctype=Appendix&subtype=B -URIDate 2024-03-27 + Details
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- Definition The entity's share of the profit (loss) of associates and joint ventures accounted for using the equity method. [Refer: Total for all associates [member]; Investments accounted for using equity method; Total for all joint ventures [member]; Profit (loss)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2024-01-01 -Paragraph 28 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2024-en-r&anchor=para_28_e&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2024-01-01 -Paragraph 23 -Subparagraph g -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2024-en-r&anchor=para_23_g&doctype=Standard -URIDate 2024-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 82 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_82_c&doctype=Standard -URIDate 2024-03-27 + Details
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