Long-term debt, net - Schedule Of Long Term Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2016
Debt Instrument [Line Items]
Total debt	$ 373,555	$ 383,193
Less unamortized debt issuance costs	(6,645)	(7,212)
Total debt, net	366,910	375,981
Less current portion, net	(44,383)	(42,614)
Total long-term debt, net	322,527	333,367
Experience Vessel Financing [Member]
Debt Instrument [Line Items]
Total debt	120,656	123,750	$ 247,500
2017 Bank Loans [Member]
Debt Instrument [Line Items]
Total debt	72,157	74,013
EE Revolver [Member]
Debt Instrument [Line Items]
Total debt	0	0
Term Loan Facility [Member]
Debt Instrument [Line Items]
Total debt	$ 180,742	$ 185,430