Details Of Certain Accounts - Other Assets, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Prepaids	$ 1,028	$ 5,896
Deferred recertification and dry dock costs, net	21,676	8,525
Deferred costs (Note 9)	33,058	38,574
Charter deposit	12,544	12,544
Other receivable (Note 13)	25,410	0
Other	4,561	4,518
Total other assets, net	$ 98,277	$ 70,057