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Income and other taxes - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets $ 204,091 $ 152,250 $ 46,353
Current tax expense (income), related to Pillar Two income taxes 3,000    
United States      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deductible temporary differences for which no deferred tax asset is recognised 170,000 201,000  
Trinidad      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Operating loss carryforwards 107,000 82,000  
Deferred tax assets 38,000 29,000  
New Zealand      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Operating loss carryforwards 36,000 25,000  
Deferred tax assets 10,000 7,000  
Canada      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Operating loss carryforwards 47,000 123,000  
Deferred tax assets $ 12,000 $ 30,000