v3.26.1
Tax matters - Components of current and deferred tax expense (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Tax matters      
Current income tax charge $ 3,670 $ 28,004 $ 62,110
Adjustments in current income tax in respect of prior years (300) (1,183) (1,533)
Total 3,370 26,821 60,577
Origination and reversal of temporary differences (9,162) (7,758) (3,216)
Impact of tax rate changes   (48) (555)
Write-down of deferred tax assets 7,292    
Adjustments in deferred tax in respect of prior years 968 (2,763) 734
Total (902) (10,569) (3,037)
Income tax expense $ 2,468 $ 16,252 $ 57,540