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Basis for preparation, consolidation and accounting policies - Impact of Adoption of IFRIC 23 on consolidated statement of financial position (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Liabilities        
Current tax liabilities, current $ 3,026 $ 3,162    
Total liabilities 2,023,280 1,179,760 $ 1,139,074  
Equity, net        
Retained earnings 1,239,526 1,503,785    
Total equity, net $ 2,538,531 $ 2,799,857 $ 2,968,200 $ 3,028,226