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Segment financial information - Summary of Net Assets Classified As Held for Sale (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Segment financial information |  |
Assets held for sale-current | $ 55,878 | $ 0
Liabilities held for sale-current | 59,075 | $ 0
Disposal Group, Held-for-Sale, Not Discontinued Operations | Mahipapa |  |
Segment financial information |  |
Property, plant and equipment, net of accumulated depreciation | 46,051 |
Other assets | 9,827 |
Assets held for sale-current | 55,878 |
Long-term debt, net | 51,116 |
Other liabilities | 7,959 |
Liabilities held for sale-current | $ 59,075 |

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