Property and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Property Plant And Equipment [Abstract]
Ships	$ 10,781,703	$ 10,266,874
Ships improvements	807,233	506,880
Ships under construction	450,372	300,575
Land and land improvements	37,535	19,138
Other	483,744	408,523
Property Plant And Equipment, Gross	12,560,587	11,501,990
Less: accumulated depreciation	(2,442,898)	(2,043,185)
Property and equipment, net	$ 10,117,689	$ 9,458,805