Vessels - Vessel and Vessel Improvements (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Movement in Property, Plant and Equipment [Roll Forward]
Vessel held for sale	$ (5,592)	$ 0
Discontinued Operations, Held-for-sale
Movement in Property, Plant and Equipment [Roll Forward]
Vessel held for sale	(5,592)
Vessels and Vessel Improvements
Movement in Property, Plant and Equipment [Roll Forward]
Vessels and vessel improvements, beginning balance	908,076
Purchase of vessels and vessel improvements	466
Scrubbers and BWTS	5,760
Depreciation expense	(23,455)
Vessels and vessel improvements, ending balance	885,255
Vessel Cardinal
Movement in Property, Plant and Equipment [Roll Forward]
Vessel held for sale	$ (5,600)