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Lease liabilities - Summary (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Lease liabilities      
Non-current $ 283,549 $ 201,718  
Current 54,431 45,136  
Lease liabilities $ 337,980 $ 246,854 $ 195,772