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Current and long-term debt - CSSC Shipping lease financing (Details)
$ in Thousands
1 Months Ended 2 Months Ended 12 Months Ended
Oct. 31, 2023
USD ($)
Sep. 30, 2021
USD ($)
Nov. 30, 2020
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Jul. 31, 2023
Sep. 01, 2017
vessel
Disclosure of detailed information about borrowings [line items]                
Principal repayments recognized in consolidated cash flow statements       $ 516,127 $ 79,502 $ 56,729    
CSSC Scrubber Lease Financing and CSSC Lease Financing                
Disclosure of detailed information about borrowings [line items]                
Repayments of borrowings     $ 81,700          
Prepayments     $ 1,600          
Principal repayments recognized in consolidated cash flow statements $ 110,400              
Vessels | LR2 | Finance Lease - CSSC Lease Financing, Amended and Restated | STI Gratitude, STI Gladiator, STI Gauntlet, STI Guide and STI Goal                
Disclosure of detailed information about borrowings [line items]                
Borrowings, option to extend   24 months            
Vessels | LR2 | Finance Lease - CSSC Lease Financing, Amended and Restated | Secured Overnight Financing Rate (SOFR) | STI Gratitude, STI Gladiator, STI Gauntlet, STI Guide and STI Goal                
Disclosure of detailed information about borrowings [line items]                
Adjustment to interest rate basis             3.50%  
Vessels | LR2 | NPTI September Closing | CSSC Lease Financing | STI Gallantry, STI Nautilus, STI Guard, STI Guide, STI Goal, STI Gauntlet, STI Gladiator and STI Gratitude                
Disclosure of detailed information about borrowings [line items]                
Number of vessels under finance lease arrangements | vessel               8
Ships to be installed with scrubbers | LR2 | CSSC Lease Financing                
Disclosure of detailed information about borrowings [line items]                
Periodic payment per vessel   $ 200