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Net income per ordinary share - Schedule of Reconciliation of Net Income Attributable to the Group (Details) - $ / shares
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Net income per Ordinary Share attributable to the Group:        
Basic (in USD per share) $ 1.41 $ 1.42 $ 2.84 $ 2.80
Diluted (in USD per share) $ 1.40 $ 1.41 $ 2.81 $ 2.76