Vessels and Vessel Improvements - Schedule of Vessels and Vessel Improvements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Movement in Property, Plant and Equipment [Roll Forward]
Beginning balance	$ 891,877
Acquisition of vessels and vessel improvements	2,300	$ 6,200
Depreciation expense	(200)	(200)	$ (300)
Ending balance	904,298	891,877
Vessels and Vessel Improvements
Movement in Property, Plant and Equipment [Roll Forward]
Beginning balance	891,877	908,076
Acquisition of vessels and vessel improvements	86,255	28,289
Sale of vessels	(31,641)	(5,592)
Purchase and installation of BWTS	4,128	8,794
Depreciation expense	(46,321)	(47,690)
Ending balance	$ 904,298	$ 891,877	$ 908,076