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Note 1 - Segment information - Tubes Segment Revenues By Market (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Disclosure of operating segments [line items] |  |  |
Net Sales | $ 11,981,157 | $ 12,523,934 | $ 14,868,860
Tubes [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Net Sales | 11,400,000 | 11,907,000 | 14,185,000
Tubes [member] | Oil and natural gas [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Net Sales | 10,172,000 | 10,689,000 | 12,488,000
Tubes [member] | Oil and gas processing plants [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Net Sales | 557,000 | 548,000 | 818,000
Tubes [member] | Industrial, power and others |  |  |
Disclosure of operating segments [line items] |  |  |
Net Sales | $ 671,000 | $ 670,000 | $ 879,000

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