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Income tax - Analysis of income tax expense (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Income tax      
Current year income tax expense $ (15,456) $ (17,903) $ (3,978)
Deferred income tax (expense) benefit 67,595 (12,670) 65,709
Total income tax benefit (expense) 52,139 (30,573) [1] 61,731 [1]
Deferred income tax expense, translation effect   (118) 90
Deferred income tax related to items recognized in OCI during the year      
Net (loss) gain cash flow hedges (80) (274) 2,347
Remeasurement gain of employee benefits (79) 138 39
Deferred income tax recognized in OCI $ (159) $ (136) $ 2,386
[1] The comparative Consolidated financial statements have been re-presented from Mexican peso to U.S. dollar to reflect the Company’s change in presentation currency.