Deferred Drydock Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Changes in Deferred Drydock Costs [Roll Forward]
Beginning Balance	$ 42,849	$ 37,093
Drydocking expenditures	14,397	18,422	$ 21,906
Accrued drydocking expenditures	701	589
Amortization expense	(13,999)	(13,244)	(8,656)
Write-off due to sale of vessels	(5,231)	(11)
Ending Balance	$ 38,717	$ 42,849	$ 37,093