Vessels - Vessel and Vessel Improvements (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($)
Movement in Property, Plant and Equipment [Roll Forward]
Beginning balance	$ 891,877
Vessels and vessel improvements, at March 31, 2023	900,659
Vessels and Vessel Improvements
Movement in Property, Plant and Equipment [Roll Forward]
Beginning balance	891,877
Purchase of vessels and vessel improvements	24,513
Sale of vessels	(5,050)
Purchase of BWTS	469
Depreciation expense	(11,150)
Vessels and vessel improvements, at March 31, 2023	$ 900,659