Details Of Certain Accounts - Other Assets, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Prepaids	$ 945	$ 5,896
Deferred recertification and dry dock costs, net	19,108	8,525
Deferred costs (Note 9)	26,832	38,574
Charter deposit	12,544	12,544
Other receivable (Note 13)	25,996	0
Goodwill (Note 2)	6,763	0
Intangible assets with finite lives, net (Note 2)	3,828	1,402
Other	2,692	3,116
Total other assets, net	$ 98,708	$ 70,057