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Vessels - Vessel deliveries (Details) $ in Thousands	1 Months Ended		3 Months Ended			12 Months Ended			24 Months Ended
Vessels - Vessel deliveries (Details) $ in Thousands	Aug. 31, 2021 equipment	Jul. 31, 2018 equipment	Sep. 30, 2022 vessel	Jun. 30, 2022 vessel	Mar. 31, 2022 vessel	Dec. 31, 2023 USD ($) tanker vessel	Dec. 31, 2022 USD ($) vessel tanker	Dec. 31, 2021 USD ($)	Dec. 31, 2023 vessel tanker	Feb. 28, 2021 tanker	Dec. 31, 2019 tanker	Nov. 30, 2018 agreement tanker
Disclosure of detailed information about property, plant and equipment [line items]
Number of vessels \| vessel						1			1
Write-off of deposits on scrubbers \| $						$ 10,508	$ 0	$ 0
Percentage of equipment cost estimated to require replacement value of vessel						10.00%	10.00%
Number of vessels sold \| vessel			2	9	7		18		20
Ballast water treatment systems
Disclosure of detailed information about property, plant and equipment [line items]
Number of pieces of equipment		55				4	4
Ships to be installed with scrubbers
Disclosure of detailed information about property, plant and equipment [line items]
Number of vessels												77
Exhaust gas cleaning system
Disclosure of detailed information about property, plant and equipment [line items]
Number of agreements \| agreement												2
Number of vessels						6			6
Exhaust gas cleaning system \| Option exercised
Disclosure of detailed information about property, plant and equipment [line items]
Number of vessels											21
Postpone installation of scrubbers \| Option exercised
Disclosure of detailed information about property, plant and equipment [line items]
Number of vessels										19
Scrubbers
Disclosure of detailed information about property, plant and equipment [line items]
Number of pieces of equipment \| equipment	6