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Income taxes - Summary of income tax expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Major components of tax expense (income) [abstract]    
Current tax expense $ 114,087 $ 85,804
Deferred tax expense (recovery) 20,671 (28,229)
Income tax expense $ 134,758 $ 57,575