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Current and long-term debt - 2021 Ocean Yield financing (Details)
 1 Months Ended
Dec. 31, 2021
USD ($)
vessel
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Nov. 30, 2021
USD ($)
Disclosure of detailed information about borrowings [line items]        
Borrowings   $ 1,588,290,000 $ 1,436,224,000  
2021 Ocean Yield Lease Financing        
Disclosure of detailed information about borrowings [line items]        
Borrowings $ 70,200,000 $ 58,100,000 $ 63,900,000  
Borrowings, bareboat charter term 10 years      
Net debt to capitalization ratio 0.60      
Consolidated tangible net worth $ 1,000,000,000      
Cumulative positive net income 25.00%      
Net proceeds of equity issuance 50.00%      
2021 Ocean Yield Lease Financing | Consolidated Liquidity Requirement - Scenario One        
Disclosure of detailed information about borrowings [line items]        
Covenant liquidity requirement amount $ 25,000,000      
2021 Ocean Yield Lease Financing | Consolidated Liquidity Requirement - Scenario Two        
Disclosure of detailed information about borrowings [line items]        
Consolidated liquidity requirement per each owned vessel $ 500,000      
Consolidated liquidity requirement per each chartered-in vessel       $ 250,000
STI Gallantry and STI Guard | 2021 Ocean Yield Lease Financing | Vessels | LR2        
Disclosure of detailed information about borrowings [line items]        
Number of vessels under finance lease arrangements | vessel 2      
Periodic payment per vessel $ 200,000