Vessels - Additional Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($) vessel	Sep. 30, 2018 USD ($) vessel
Property, Plant and Equipment [Line Items]
Number of vessels | vessel	53
Ballast Water Treatment System
Property, Plant and Equipment [Line Items]
Number of vessels | vessel		39
Projected project costs | $		$ 0.5
Number Of Vessels, Installation Complete | vessel	28
Transfer from Advances Paid For Vessel Purchases | $	$ 15.7
Scrubbers and BWTS reclassified | $	$ 3.4