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Assets and liabilities held for sale and discontinued operations - Schedule of assets held for sale (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets held for sale beginning balance $ 18,459 $ 0  
Assets held for sale ending balance 871,876 18,459 $ 0
Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
(Expected) Gain 411,044 22,064 0
Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets held for sale beginning balance 18,459 0  
Assets held for sale ending balance 870,844 18,459 0
tankers | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets held for sale beginning balance 18,459 0  
Assets held for sale ending balance 870,844 18,459 0
FSO | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets held for sale beginning balance 0 0  
Assets held for sale ending balance 0 0 0
Corporate      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets held for sale beginning balance 0 0  
Assets held for sale ending balance 1,032 0 0
Corporate | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 1,031    
Corporate | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
(Expected) Gain 969    
Book Value      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets held for sale beginning balance 18,459 0  
Assets held for sale ending balance 871,876 18,459 0
Book Value | Corporate | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 1,031    
Impairment Loss      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets held for sale beginning balance 0 0  
Assets held for sale ending balance 0 0 0
Impairment Loss | Corporate | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 0    
(Estimated) Net sale price | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets held for sale beginning balance 40,523 0  
Assets held for sale ending balance 1,282,920 40,523 $ 0
(Estimated) Net sale price | Corporate | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 2,000    
Cap Charles | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale   18,459  
Assets sold from assets held for sale (18,459)    
Cap Charles | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
(Expected) Gain (22,064) 22,064  
Cap Charles | Book Value | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale   18,459  
Assets sold from assets held for sale (18,459)    
Cap Charles | Impairment Loss | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale   0  
Assets sold from assets held for sale 0    
Cap Charles | (Estimated) Net sale price | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale   $ 40,523  
Assets sold from assets held for sale (40,523)    
Alice | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 61,626    
Alice | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
(Expected) Gain 24,528    
Alice | Book Value | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 61,626    
Alice | Impairment Loss | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 0    
Alice | (Estimated) Net sale price | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 86,153    
Anne | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 62,820    
Anne | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
(Expected) Gain 23,797    
Anne | Book Value | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 62,820    
Anne | Impairment Loss | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 0    
Anne | (Estimated) Net sale price | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 86,617    
Aquitaine | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 58,657    
Aquitaine | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
(Expected) Gain 31,796    
Aquitaine | Book Value | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 58,657    
Aquitaine | Impairment Loss | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 0    
Aquitaine | (Estimated) Net sale price | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 90,453    
Dominica | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 52,826    
Dominica | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
(Expected) Gain 30,014    
Dominica | Book Value | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 52,826    
Dominica | Impairment Loss | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 0    
Dominica | (Estimated) Net sale price | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 82,840    
Desirade | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 56,071    
Desirade | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
(Expected) Gain 30,082    
Desirade | Book Value | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 56,071    
Desirade | Impairment Loss | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 0    
Desirade | (Estimated) Net sale price | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 86,153    
Alboran | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 56,367    
Alboran | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
(Expected) Gain 30,136    
Alboran | Book Value | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 56,367    
Alboran | Impairment Loss | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 0    
Alboran | (Estimated) Net sale price | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 86,503    
Aral | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 56,445    
Aral | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
(Expected) Gain 30,352    
Aral | Book Value | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 56,445    
Aral | Impairment Loss | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 0    
Aral | (Estimated) Net sale price | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 86,797    
Andaman | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 56,636    
Andaman | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
(Expected) Gain 30,494    
Andaman | Book Value | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 56,636    
Andaman | Impairment Loss | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 0    
Andaman | (Estimated) Net sale price | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 87,130    
Hatteras | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 59,368    
Hatteras | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
(Expected) Gain 30,969    
Hatteras | Book Value | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 59,368    
Hatteras | Impairment Loss | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 0    
Hatteras | (Estimated) Net sale price | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 90,337    
Delos | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 83,611    
Delos | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
(Expected) Gain 29,409    
Delos | Book Value | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 83,611    
Delos | Impairment Loss | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 0    
Delos | (Estimated) Net sale price | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 113,020    
Doris | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 84,438    
Doris | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
(Expected) Gain 28,892    
Doris | Book Value | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 84,438    
Doris | Impairment Loss | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 0    
Doris | (Estimated) Net sale price | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 113,330    
Derius | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 81,458    
Derius | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
(Expected) Gain 23,212    
Derius | Book Value | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 81,458    
Derius | Impairment Loss | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 0    
Derius | (Estimated) Net sale price | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 104,670    
Camus | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 92,228    
Camus | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
(Expected) Gain 31,569    
Camus | Book Value | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 92,228    
Camus | Impairment Loss | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 0    
Camus | (Estimated) Net sale price | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 123,797    
Oceania      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets held for sale beginning balance      
Assets held for sale ending balance 8,300    
Oceania | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 8,294    
Oceania | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
(Expected) Gain 34,826    
Oceania | Book Value | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 8,294    
Oceania | Impairment Loss | Vessels      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale 0    
Oceania | (Estimated) Net sale price | Vessels | Forecast      
Disclosure Of Assets And Liabilities Held For Sale [Line Items]      
Assets transferred to assets held for sale $ 43,120