Vessels - Vessel and Vessel Improvements (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($)
Movement in Property, Plant and Equipment [Roll Forward]
Beginning balance	$ 891,877
Ending balance	914,108
Vessels and Vessel Improvements
Movement in Property, Plant and Equipment [Roll Forward]
Beginning balance	891,877
Purchase of vessels and vessel improvements	85,572
Sale of vessels	(31,641)
Purchase of BWTS	2,746
Depreciation expense	(34,446)
Ending balance	$ 914,108