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Related parties - Shareholders (Details) $ in Thousands		12 Months Ended
Related parties - Shareholders (Details) $ in Thousands	Nov. 06, 2020 vessel	Dec. 31, 2024 USD ($) shareholder vessel T	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Oct. 09, 2023 vessel shareholder
Disclosure of transactions between related parties [line items]
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Proportion of ownership interest in subsidiary		100.00%
Number of time charter agreements entered into \| vessel	2
Suezmax
Disclosure of transactions between related parties [line items]
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Vessels \| Sapphira - Sale
Disclosure of transactions between related parties [line items]
Property plant and equipment, boat carrying capacity		150,205
Vessels \| Statia - Sale
Disclosure of transactions between related parties [line items]
Property plant and equipment, boat carrying capacity		150,205
Vessels \| Selena - Sale
Disclosure of transactions between related parties [line items]
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Vessels \| Cap Victor - Sale
Disclosure of transactions between related parties [line items]
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Vessels \| Cap Felix - Sale
Disclosure of transactions between related parties [line items]
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Subsidiaries \| MCA Facilities
Disclosure of transactions between related parties [line items]
Lease agreement, term		3 years
Leases as lessee, related party transactions \| $		$ 1,264	$ 335	$ 420
Trade payables \| $		197	$ 157
Parent [member] \| CMB
Disclosure of transactions between related parties [line items]
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Auxiliary services true-up percentage		0.05
Shipping services true-up percentage		0.0125
Services received, related party transactions \| $		$ 9,800
CMB.TECH NV \| CMB
Disclosure of transactions between related parties [line items]
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Percentage of voting equity interests acquired		92.02%
24 VLCC tankers
Disclosure of transactions between related parties [line items]
Number of shareholders involved in transaction \| shareholder					2
Number of vessels sold \| vessel					24