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Income taxes - Additional Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Income Tax Expenses [Line Items]          
Canadian enacted statutory rate (percent) 26.50%   26.50%    
Income tax benefit $ 5,228 $ 55,958 $ 16,531 $ 31,257  
Renewable Energy Credits          
Income Tax Expenses [Line Items]          
Income tax benefit 17,160 $ 8,095 20,463 $ 20,505  
Tax credits 55,231   55,231   $ 0
Solar Facility          
Income Tax Expenses [Line Items]          
Income tax benefit $ 10,372   10,372    
Minimum          
Income Tax Expenses [Line Items]          
Deferred tax asset, increase (decrease), amount     151,759    
Maximum          
Income Tax Expenses [Line Items]          
Deferred tax asset, increase (decrease), amount     $ 152,705