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Financial instruments by category - Income, expense, gains and losses on financial instruments (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure Of Financial Assets And Financial Liabilities [Line Items]      
Interest income $ 5,781 $ 4,081 $ 4,084
Interest expense (50,037) (62,536) $ (58,282)
Foreign exchange gains/(losses) 19,278 18,939  
Loss from derivative financial instruments (9,226) (15,478)  
Finance cost related to lease liabilities (31,113) (16,502)  
Financial asset / liabilities at amortized cost      
Disclosure Of Financial Assets And Financial Liabilities [Line Items]      
Interest income 5,117 4,081  
Interest expense (50,037) (62,536)  
Foreign exchange gains/(losses) 19,278 18,939  
Loss from derivative financial instruments (4,472) 0  
Finance cost related to lease liabilities (31,113) (16,502)  
Financial assets at fair value through profit or loss | Liabilities at fair value through profit or loss      
Disclosure Of Financial Assets And Financial Liabilities [Line Items]      
Interest income 664 0  
Interest expense 0 0  
Foreign exchange gains/(losses) 0 0  
Loss from derivative financial instruments (4,754) (15,478)  
Finance cost related to lease liabilities $ 0 $ 0