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Income taxes - Additional information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Major components of tax expense income [line items]    
Reduction in Greek income tax rate $ 11,434 $ 0
Increase in Turkish income tax rate 6,150 0
Tax losses 192,880 181,667
Deferred tax expense (income) relating to origination and reversal of temporary differences 85,142 39,394
Temporary differences associated with investments in subsidiaries 1,032,084 927,295
Deferred tax expense recognized 54,587 $ 10,636
Turkish lira    
Major components of tax expense income [line items]    
Deferred tax expense recognized 37,126  
Euro    
Major components of tax expense income [line items]    
Deferred tax expense recognized $ 12,930