Vessels - Vessel and Vessel Improvements (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Movement in Property, Plant and Equipment [Roll Forward]
Beginning balance	$ 891,877
Vessel held for sale	11,052	$ 0
Vessels and vessel improvements, at March 31, 2023	925,632
Vessels and Vessel Improvements
Movement in Property, Plant and Equipment [Roll Forward]
Beginning balance	891,877
Purchase of vessels and vessel improvements	85,402
Sale of vessels	(22,160)
Vessel held for sale	(9,477)
Purchase of BWTS	2,541
Depreciation expense	(22,551)
Vessels and vessel improvements, at March 31, 2023	$ 925,632