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Note 22 - Deferred tax assets and liabilities - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |  |
At the beginning of the year |  | $ (327,357) |  | $ (158,010) |
Translation differences |  | (1,309) |  | 764 |
Changes due to business combinations |  |  | [1] | 1,761 | [2]
Decrease due to deconsolidation of subsidiaries | [3] | (8) |  |  |
Charged to other comprehensive income |  | (1,646) |  | 217 |
Income statement (credit) / charge |  | (61,600) |  | (172,089) |
At the end of the year |  | (391,920) |  | (327,357) |
Deferred tax assets, provisions and allowances [member] |  |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |  |
At the beginning of the year |  | 55,925 |  | 31,511 |
Translation differences |  | 88 |  | (22) |
Changes due to business combinations |  |  | [4] |  | [5]
Charged to other comprehensive income |  |  |  |  |
Income statement (credit) / charge |  | 7,532 |  | 24,436 |
At the end of the year |  | 63,545 |  | 55,925 |
Deferred tax assets, inventory [member] |  |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |  |
At the beginning of the year |  | 153,915 |  | 199,019 |
Translation differences |  | 868 |  | (277) |
Changes due to business combinations |  |  | [4] | 88 | [1]
Charged to other comprehensive income |  |  |  |  |
Income statement (credit) / charge |  | 11,987 |  | (44,915) |
At the end of the year |  | 166,770 |  | 153,915 |
Deferred tax assets, tax loss [member] |  |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |  |
At the beginning of the year |  | 714,798 |  | 634,894 |
Translation differences |  | 122 |  | (76) |
Changes due to business combinations |  | 3,014 | [6] | (414) | [1]
Charged to other comprehensive income |  | 153 |  | (2,006) |
Income statement (credit) / charge |  | (56,032) |  | 82,400 |
At the end of the year |  | 662,055 |  | 714,798 |
Deferred tax assets, other [member] |  |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |  |
At the beginning of the year |  | 160,804 |  | 185,997 |
Translation differences |  | 1,290 |  | (829) |
Changes due to business combinations |  |  | [4] | 1,821 | [1]
Charged to other comprehensive income |  | 1,237 |  | 885 |
Income statement (credit) / charge |  | 3,375 |  | (27,070) |
At the end of the year |  | 166,706 |  | 160,804 |
Deferred tax assets [member] |  |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |  |
At the beginning of the year |  | 1,085,442 |  | 1,051,421 |
Translation differences |  | 2,368 |  | (1,204) |
Changes due to business combinations |  | 3,014 | [6] | 1,495 | [1]
Charged to other comprehensive income |  | 1,390 |  | (1,121) |
Income statement (credit) / charge |  | (33,138) |  | 34,851 |
At the end of the year |  | 1,059,076 |  | 1,085,442 |
Deferred tax liabilities, fixed assets [member] |  |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |  |
At the beginning of the year |  | 568,638 |  | 618,874 |
Translation differences |  | 646 |  | (194) |
Changes due to business combinations |  | 3,014 | [6] | 1,223 | [5]
Decrease due to deconsolidation of subsidiaries | [3] | (8) |  |  |
Charged to other comprehensive income |  |  |  |  |
Income statement (credit) / charge |  | (35,792) |  | (51,265) |
At the end of the year |  | 536,498 |  | 568,638 |
Deferred tax liabilities, inventory [member] |  |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |  |
At the beginning of the year |  | 75,230 |  | 114,335 |
Translation differences |  |  |  | (72) |
Changes due to business combinations |  |  | [6] |  | [5]
Decrease due to deconsolidation of subsidiaries | [3] |  |  |  |
Charged to other comprehensive income |  |  |  |  |
Income statement (credit) / charge |  | (29,331) |  | (39,033) |
At the end of the year |  | 45,899 |  | 75,230 |
Deferred tax liabilities, intangible assets and other [member] |  |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |  |
At the beginning of the year |  | 114,217 |  | 160,202 |
Translation differences |  | 413 |  | (174) |
Changes due to business combinations |  |  | [6] | 2,033 | [5]
Decrease due to deconsolidation of subsidiaries | [3] |  |  |  |
Charged to other comprehensive income |  | (256) |  | (904) |
Income statement (credit) / charge |  | (29,615) |  | (46,940) |
At the end of the year |  | 84,759 |  | 114,217 |
Deferred Tax liabilities [member] |  |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |  |
At the beginning of the year |  | 758,085 |  | 893,411 |
Translation differences |  | 1,059 |  | (440) |
Changes due to business combinations |  | 3,014 | [6] | 3,256 | [5]
Decrease due to deconsolidation of subsidiaries | [3] | (8) |  |  |
Charged to other comprehensive income |  | (256) |  | (904) |
Income statement (credit) / charge |  | (94,738) |  | (137,238) |
At the end of the year |  | $ 667,156 |  | $ 758,085 |
[1] | For the year 2024, related to Mattr’s pipe coating business unit acquisition.
[2] | For the year 2024, related to Mattr’s pipe coating business unit acquisitions.
[3] | For the year 202 5, related to the deconsolidation of Amaja Tubular Services Limited.
[4] | For the year 2025, related to the acquisition of a scrap processing business in Beaver Falls, Pennsylvania. For more information see note 34.
[5] | For the year 2024, related to Mattr’s pipe coating business unit acquisition.
[6] | For the year 2025, related to the acquisition of a scrap processing business in Beaver Falls, Pennsylvania. For more information see note 34.

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