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Supplemental information on oil and gas activities (Schedule of Costs Incurred in Exploration, Property Acquisitions and Development) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure Of Supplemental information on oil and gas activities [Line Items]      
Acquisition of properties, Proved $ 0 $ 0 $ 202,913
Acquisition of properties, Unproved 0 0 73,310
Total property acquisition 0 0 276,223
Exploration 76,187 45,769 29,951
Development 99,619 81,000 51,930
Total costs incurred 175,806 126,769 81,881
Colombia [Member]      
Disclosure Of Supplemental information on oil and gas activities [Line Items]      
Acquisition of properties, Proved 0 0 202,913
Acquisition of properties, Unproved 0 0 73,310
Total property acquisition 0 0 276,223
Exploration 48,771 40,828 19,142
Development 89,231 81,310 51,793
Total costs incurred 138,002 122,138 70,935
Chile [Member]      
Disclosure Of Supplemental information on oil and gas activities [Line Items]      
Acquisition of properties, Proved 0 0 0
Acquisition of properties, Unproved 0 0 0
Total property acquisition 0 0 0
Exploration 116 3,940 9,447
Development 9,952 1,900 3,580
Total costs incurred 10,068 5,840 13,027
Brazil [Member]      
Disclosure Of Supplemental information on oil and gas activities [Line Items]      
Acquisition of properties, Proved 0 0 0
Acquisition of properties, Unproved 0 0 0
Total property acquisition 0 0 0
Exploration 0 3 668
Development (212) (2,212) 412
Total costs incurred (212) (2,209) 1,080
Argentina [Member]      
Disclosure Of Supplemental information on oil and gas activities [Line Items]      
Acquisition of properties, Proved 0 0 0
Acquisition of properties, Unproved 0 0 0
Total property acquisition 0 0 0
Exploration 779 998 694
Development 0 2 (3,855)
Total costs incurred 779 $ 1,000 $ (3,161)
Ecuador [Member]      
Disclosure Of Supplemental information on oil and gas activities [Line Items]      
Acquisition of properties, Proved 0    
Acquisition of properties, Unproved 0    
Total property acquisition 0    
Exploration 26,521    
Development 648    
Total costs incurred $ 27,169