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Vessels - Vessel and Vessel Improvements (Details) - Vessels and Vessel Improvements
$ in Thousands
3 Months Ended
Mar. 31, 2022
USD ($)
Movement in Property, Plant and Equipment [Roll Forward]  
Vessels and vessel improvements, beginning balance $ 908,076
Purchase of vessels and vessel improvements 247
Scrubbers and BWTS 4,245
Depreciation expense (11,648)
Vessels and vessel improvements, ending balance $ 900,920