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RELATED PARTY TRANSACTIONS (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Disclosure of transactions between related parties [line items] |  |
Key management personnel compensation | $ 18,137 | $ 13,736
Key management personnel compensation (in shares) | 1,194,190 |
Key management personnel compensation, share-based payment | $ 6,276 | $ 4,289
Techint Holdings S.à.r.l | Entities with joint control or significant influence over entity |  |
Disclosure of transactions between related parties [line items] |  |
Percentage of Company shares owned | 62.02% |
Tenaris Investments S.a.r.l. | Entities with joint control or significant influence over entity |  |
Disclosure of transactions between related parties [line items] |  |
Percentage of Company shares owned | 11.46% |

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