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Long-term debt - Components of long-term debt (Details) - USD ($)
Dec. 31, 2023
Dec. 31, 2022
Disclosure of detailed information about borrowings [line items]    
Total long-term debt $ 2,141,801,000 $ 2,151,513,000
Less current maturities (314,716,000) (15,133,000)
Non-current portion of long-term debt 1,827,085,000 2,136,380,000
Debt discounts and deferred financing fees 16,800,000 19,400,000
Unsecured notes    
Disclosure of detailed information about borrowings [line items]    
Total long-term debt 1,985,660,000 1,983,374,000
$300 million at 4.25% due December 1, 2024    
Disclosure of detailed information about borrowings [line items]    
Total long-term debt 299,283,000 298,836,000
Notional amount $ 300,000,000  
$300 million at 4.25% due December 1, 2024 | Fixed interest rate    
Disclosure of detailed information about borrowings [line items]    
Interest rate 4.25%  
$700 million at 5.125% due October 15, 2027    
Disclosure of detailed information about borrowings [line items]    
Total long-term debt $ 694,844,000 693,649,000
Notional amount $ 700,000,000  
$700 million at 5.125% due October 15, 2027 | Fixed interest rate    
Disclosure of detailed information about borrowings [line items]    
Interest rate 5.125%  
$700 million at 5.25% due December 15, 2029    
Disclosure of detailed information about borrowings [line items]    
Total long-term debt $ 695,824,000 695,283,000
Notional amount $ 700,000,000  
$700 million at 5.25% due December 15, 2029 | Fixed interest rate    
Disclosure of detailed information about borrowings [line items]    
Interest rate 5.25%  
$300 million at 5.65% due December 1, 2044    
Disclosure of detailed information about borrowings [line items]    
Total long-term debt $ 295,709,000 295,606,000
Notional amount $ 300,000,000  
$300 million at 5.65% due December 1, 2044 | Fixed interest rate    
Disclosure of detailed information about borrowings [line items]    
Interest rate 5.65%  
Other limited recourse debt facilities    
Disclosure of detailed information about borrowings [line items]    
Total long-term debt $ 156,141,000 168,139,000
5.58% due June 30, 2031    
Disclosure of detailed information about borrowings [line items]    
Total long-term debt $ 56,637,000 61,978,000
5.58% due June 30, 2031 | Fixed interest rate    
Disclosure of detailed information about borrowings [line items]    
Interest rate 5.58%  
5.35% due September 30, 2033    
Disclosure of detailed information about borrowings [line items]    
Total long-term debt $ 65,300,000 70,312,000
5.35% due September 30, 2033 | Fixed interest rate    
Disclosure of detailed information about borrowings [line items]    
Interest rate 5.35%  
5.21% due September 15, 2036    
Disclosure of detailed information about borrowings [line items]    
Total long-term debt $ 34,204,000 $ 35,849,000
5.21% due September 15, 2036 | Fixed interest rate    
Disclosure of detailed information about borrowings [line items]    
Interest rate 5.21%