v3.26.1
Provisions - Summary of movements in provision (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of other provisions [line items]      
Discount for well plugging and abandonment (Note 10.3) $ 2,434 $ 1,312 $ 2,387
Asset retirement obligation [member]      
Disclosure of other provisions [line items]      
Amounts at beginning of year 32,438 15,287  
Discount for well plugging and abandonment (Note 10.3) 2,434 1,312  
Increase in the change in capitalized estimates (Note 12) 5,397 23,325  
Incorporation through business combination (Note 1.2.2 and 32) 12,013 0  
Increase (decrease) in the change in estimates of conventional assets 2,340 (7,486)  
Settlements (165) 0  
Amounts at end of year 54,457 32,438 15,287
Environmental remediation [member]      
Disclosure of other provisions [line items]      
Amounts at beginning of year 4,516 1,084  
Increase (decrease) in the change in estimates of conventional assets (611) 3,442  
Increases (Note 9.2) 201 359  
Foreign exchange differences (1,494) (369)  
Amounts at end of year 2,612 4,516 1,084
Provisions for contingencies [member]      
Disclosure of other provisions [line items]      
Amounts at beginning of year 14 101  
Incorporation through business combination (Note 1.2.2 and 32) 12,051 0  
Increases (Note 9.2) 735 688  
Amounts incurred for payments/settlements (3,512) (751)  
Foreign exchange differences (4,044) (24)  
Amounts at end of year $ 5,244 $ 14 $ 101