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Asset retirement obligations - Summary of asset retirement obligations (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Disclosure of Asset Retirement Obligations [line items]    
Beginning Balance $ 109,873 $ 135,455
Accretion during the year 4,718 2,242
Revisions to estimate 18,437 (14,311)
Settlements (3,591) (3,202)
Reclassified to liabilities associated with assets held for sale (328) (10,311)
Ending Balance 129,109 109,873
Less: Current liability portion (4,019) (3,980)
Non-current liability portion 125,090 105,893
Estimated undiscounted amount 212,709 185,668
Turkiye    
Disclosure of Asset Retirement Obligations [line items]    
Beginning Balance 54,521 54,594
Accretion during the year 2,224 965
Revisions to estimate 20,095 161
Settlements (483) (1,199)
Reclassified to liabilities associated with assets held for sale 0 0
Ending Balance 76,357 54,521
Less: Current liability portion 0 0
Non-current liability portion 76,357 54,521
Estimated undiscounted amount 127,181 92,673
Canada    
Disclosure of Asset Retirement Obligations [line items]    
Beginning Balance 14,215 15,838
Accretion during the year 336 144
Revisions to estimate 757 (1,767)
Settlements 0 0
Reclassified to liabilities associated with assets held for sale 0 0
Ending Balance 15,308 14,215
Less: Current liability portion 0 0
Non-current liability portion 15,308 14,215
Estimated undiscounted amount 20,757 20,022
Greece    
Disclosure of Asset Retirement Obligations [line items]    
Beginning Balance 41,137 51,535
Accretion during the year 1,731 871
Revisions to estimate (2,316) (9,266)
Settlements (3,108) (2,003)
Reclassified to liabilities associated with assets held for sale 0 0
Ending Balance 37,444 41,137
Less: Current liability portion (4,019) (3,980)
Non-current liability portion 33,425 37,157
Estimated undiscounted amount 64,771 72,973
Romania    
Disclosure of Asset Retirement Obligations [line items]    
Beginning Balance 0 13,488
Accretion during the year 427 262
Revisions to estimate (99) (3,439)
Settlements 0 0
Reclassified to liabilities associated with assets held for sale (328) (10,311)
Ending Balance 0 0
Less: Current liability portion 0 0
Non-current liability portion 0 0
Estimated undiscounted amount $ 0 $ 0