Property, plant and equipment (Details) - USD ($) $ in Thousands |
6 Months Ended | |
---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
|
Property, plant and equipment | ||
Additions | $ 32,759 | $ 28,723 |
Depreciation on property, plant and equipment | 37,882 | 34,096 |
Mine development | ||
Property, plant and equipment | ||
Additions | 14,022 | 11,318 |
Construction in progress | ||
Property, plant and equipment | ||
Additions | $ 18,706 | $ 17,149 |