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Revenues - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Capitalized Contract Cost [Line Items]      
Passenger ticket revenues $ 2,032,750 $ 2,439,767  
Customer refunds 847,200 32,900  
Contract liability 470,200   $ 1,700,000
Contract asset 54,900   55,500
Commission, transportation and other      
Capitalized Contract Cost [Line Items]      
Prepaid travel agent commissions $ 33,500   $ 163,200
Minimum      
Capitalized Contract Cost [Line Items]      
Length of cruise 2 days    
Maximum      
Capitalized Contract Cost [Line Items]      
Length of cruise 25 days    
Port Costs      
Capitalized Contract Cost [Line Items]      
Passenger ticket revenues $ 124,500 $ 152,000