Provisions - Summary of classification of provisions (Detail) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Disclosure of other provisions [line items] | ||
| Non-Current | $ 51,513 | $ 33,058 |
| Current | 10,800 | 3,910 |
| Contingencies [Member] | ||
| Disclosure of other provisions [line items] | ||
| Current | 5,244 | 14 |
| Well plugging and abandonment [Member] | ||
| Disclosure of other provisions [line items] | ||
| Non-Current | 51,279 | 31,026 |
| Current | 3,178 | 1,412 |
| Environmental remediation [member] | ||
| Disclosure of other provisions [line items] | ||
| Non-Current | 234 | 2,032 |
| Current | $ 2,378 | $ 2,484 |