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Capital disclosures (Details) - USD ($)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of liquidity and capitalization [Line Items]      
Cash and cash equivalents $ 458,015,000 $ 857,747,000 $ 932,069,000
Total liquidity 758,015,000 1,457,747,000  
Total debt 2,141,801,000 2,151,513,000  
Non-controlling interests 242,090,000 317,444,000  
Shareholders’ equity 1,930,927,000 2,112,013,000  
Total capitalization $ 4,314,818,000 $ 4,580,970,000  
Total debt to capitalization 50.00% 47.00%  
Net debt to capitalization 44.00% 35.00%  
Undrawn credit facility      
Disclosure of liquidity and capitalization [Line Items]      
Undrawn credit facility $ 300,000,000 $ 300,000,000  
G3 construction facility      
Disclosure of liquidity and capitalization [Line Items]      
Undrawn credit facility 0 300,000,000  
Cancellation of non-revolving construction facility 300,000,000    
Unsecured notes      
Disclosure of liquidity and capitalization [Line Items]      
Total debt 1,985,660,000 1,983,374,000  
Other limited recourse debt facilities      
Disclosure of liquidity and capitalization [Line Items]      
Total debt $ 156,141,000 $ 168,139,000