Annual report pursuant to Section 13 and 15(d)

Property and Equipment, Net (Details)

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Property and Equipment, Net (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Property Plant And Equipment [Line Items]    
Property and equipment, gross $ 15,525,164 $ 13,921,511
Less: accumulated depreciation (3,405,911) (2,881,023)
Property and equipment, net 12,119,253 11,040,488
Ships    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 13,032,555 11,814,409
Ships improvements    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 1,407,989 1,060,049
Ships under construction    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 491,632 521,597
Land and land improvements    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 34,936 37,535
Other    
Property Plant And Equipment [Line Items]    
Property and equipment, gross $ 558,052 $ 487,921