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Asset retirement obligations - Summary of asset retirement obligations (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Disclosure of Asset Retirement Obligations [line items]    
Beginning Balance $ 129,109 $ 109,873
Accretion during the year 5,316 4,718
Revisions to estimate 1,504 18,437
Settlements (3,688) (3,591)
Reclassified to liabilities associated with assets held for sale 755 (328)
Ending Balance 132,996 129,109
Less: Current liability portion (5,071) (4,019)
Non-current liability portion 127,925 125,090
Estimated undiscounted amount 252,617 212,709
Turkiye    
Disclosure of Asset Retirement Obligations [line items]    
Beginning Balance 76,357 54,521
Accretion during the year 2,963 2,224
Revisions to estimate 6,589 20,095
Settlements (635) (483)
Reclassified to liabilities associated with assets held for sale 0 0
Ending Balance 85,274 76,357
Less: Current liability portion 0 0
Non-current liability portion 85,274 76,357
Estimated undiscounted amount 157,040 127,181
Canada    
Disclosure of Asset Retirement Obligations [line items]    
Beginning Balance 15,308 14,215
Accretion during the year 355 336
Revisions to estimate (3,856) 757
Settlements 0 0
Reclassified to liabilities associated with assets held for sale 0 0
Ending Balance 11,807 15,308
Less: Current liability portion 0 0
Non-current liability portion 11,807 15,308
Estimated undiscounted amount 27,740 20,757
Greece    
Disclosure of Asset Retirement Obligations [line items]    
Beginning Balance 37,444 41,137
Accretion during the year 1,551 1,731
Revisions to estimate (27) (2,316)
Settlements (3,053) (3,108)
Reclassified to liabilities associated with assets held for sale 0 0
Ending Balance 35,915 37,444
Less: Current liability portion (5,071) (4,019)
Non-current liability portion 30,844 33,425
Estimated undiscounted amount 67,837 64,771
Romania    
Disclosure of Asset Retirement Obligations [line items]    
Beginning Balance 0 0
Accretion during the year 447 427
Revisions to estimate (1,202) (99)
Settlements 0 0
Reclassified to liabilities associated with assets held for sale 755 (328)
Ending Balance 0 0
Less: Current liability portion 0 0
Non-current liability portion 0 0
Estimated undiscounted amount $ 0 $ 0