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Income tax - Reconciliation of statutory corporate income tax rate to effective tax rate (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Reconciliation of accounting profit multiplied by applicable tax rates [abstract]      
Statutory income tax rate $ 2,233 $ (39,709) $ 41,108
Amendment tax return effects and other tax adjustments 7,074 1,242 29
Inflation on furniture, intangible and equipment (1,370) (309) (2,323)
Inflation of tax losses (6,734) (4,335) (1,971)
Foreign countries difference with Mexican statutory rate 21 (9) 124
Annual inflation adjustment (3,262) (11,200) (7,971)
Effect of unrecognized (recognized) NOLs 3,030 7 (434)
Non-deductible expenses 26,132 7,695 2,069
Difference in Foreign Exchange losses for tax purposes (27,501) (5,521)  
Total income tax expense $ (377) $ (52,139) $ 30,573
Statutory income tax rate 30.00% 30.00% 30.00%
Amendment tax return effects and other tax adjustments 95.05% (0.94%) (0.02%)
Inflation on furniture, intangible and equipment (18.41%) 0.23% (1.70%)
Inflation of tax losses (90.48%) 3.28% (1.44%)
Foreign countries difference with Mexican statutory rate 0.28% 0.00% 0.10%
Annual inflation adjustment (43.83%) 8.46% (5.82%)
Effect of unrecognized (recognized) NOLs 40.71%   (0.32%)
Recorded deferred taxes on tax losses   0.00%  
Non-deductible expenses 351.15% (5.81%) 1.51%
Difference in Foreign Exchange losses for tax purposes (369.53%) 4.17%  
Total effective tax rate (5.06%) 39.39% 22.31%