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Property and equipment - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Property, Plant and Equipment [Line Items]        
Discount rate, full cost ceiling (as a percent)     10.00%  
Impairment expense     $ 1,005,242 $ 0
Impairment expense $ 419,955 $ 0 1,005,242 $ 0
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Working Interest, Oil And Gas Properties        
Property, Plant and Equipment [Line Items]        
Proceeds from dispositions after transaction costs $ 30,500   30,500  
Removal of asset retirement obligations     $ 8,400