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Investments subject to significant influence (Tables) | 3 Months Ended
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Mar. 31, 2026
Equity Method Investments and Joint Ventures [Abstract] |
Schedule of investments subject to significant influence |
| Equity Method |  | Carried at fair value |  |
| Maaden Joint Venture |  | VRB China |  | Other |  | Sama |  | Total
Balance at December 31, 2025 | $ | 8,227 |  |  | $ | 47,156 |  |  | $ | 827 |  |  | $ | 2,189 |  |  | $ | 58,399 |
Investment | 6,250 |  |  | — |  |  | — |  |  | — |  |  | 6,250 |
Change in fair value | — |  |  | — |  |  | — |  |  | 323 |  |  | 323 |
Share of (loss) income | (2,323) |  |  | (1,485) |  |  | 33 |  |  | — |  |  | (3,775) |
Foreign currency translation | — |  |  | (128) |  |  | (15) |  |  | — |  |  | (143) |
Balance at March 31, 2026 | $ | 12,154 |  |  | $ | 45,543 |  |  | $ | 845 |  |  | $ | 2,512 |  |  | $ | 61,054 |

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- Definition Tabular disclosure of equity method investments including, but not limited to, name of each investee or group of investments, percentage ownership, difference between recorded amount of an investment and the value of the underlying equity in the net assets, and summarized financial information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481687/323-10-50-3 + Details
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