Inventories - Impairment of value of inventory (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
|
| Inventories. | |||
| Beginning Balance | $ 34,762 | $ 29,842 | $ 30,774 |
| Provision for finished and in progress goods, note 21(a) | (4,049) | (10,536) | (7,243) |
| Reversal for finished and in progress goods, note 21(a) | (10,536) | (6,685) | (8,314) |
| Total of provision (reversal) for finished and in progress goods | (6,487) | 3,851 | (1,071) |
| Provision for spare parts and supplies, note 28(a) | 27,304 | 20,478 | 22,533 |
| Reversal for spare parts and supplies, note 28(a) | (25,377) | (19,409) | (22,394) |
| Provision (reversal) for impairment of spare parts and supplies | 1,927 | 1,069 | 139 |
| Final balance | $ 30,202 | $ 34,762 | $ 29,842 |