Details Of Certain Accounts - Other Assets, Net (Details) - USD ($) $ in Thousands		12 Months Ended
	Jul. 06, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Note receivable, net		$ 0	$ 3,758
Prepaids		5,896	7,666
Deferred recertification and dry dock costs, net (Note 2)		8,525	12,769
Deferred costs (Note 10)		38,574	63,767
Charter fee deposit		12,544	12,544
Other		4,518	4,701
Total other assets, net		70,057	105,205
Proceeds from sale of notes receivable	$ 2,000
Reversal in AOCI of previously recorded unrealized gain on note receivable		(629)	$ 629	$ 0
Other than temporary loss on note receivable		$ 1,100