Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Detail Textuals)

v3.8.0.1
Summary of Significant Accounting Policies (Detail Textuals)
$ in Thousands, shares in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2018
USD ($)
Berth
shares
Mar. 31, 2017
USD ($)
shares
Dec. 31, 2017
USD ($)
Schedule Of Significant Accounting Policies [Line Items]      
Antidilutive securities excluded from computation of earnings per share | shares 3.4 7.5  
Deferred costs     $ 51,600
Foreign currency transaction gain (loss) $ 1,800 $ 2,800  
U.S. corporate income tax rate 21.00%   35.00%
Capacity of ship, berths | Berth 50,400    
Receivables from customers included in accounts receivable, net $ 12,200   $ 13,800
Contract with customer liability $ 1,200,000   $ 1,000,000
Percentage refundable on cancellation 50.00%    
Revenue recognized included in contract liability $ 800,000    
Net cumulative effect of the change 19,143 $ 4,550  
Costs incurred to obtain customers      
Schedule Of Significant Accounting Policies [Line Items]      
Capitalized contract cost 115,000    
Costs to fulfill contracts with customers      
Schedule Of Significant Accounting Policies [Line Items]      
Capitalized contract cost 25,000    
Retained Earnings      
Schedule Of Significant Accounting Policies [Line Items]      
Net cumulative effect of the change $ 19,131    
Norwegian Bliss      
Schedule Of Significant Accounting Policies [Line Items]      
Capacity of ship, berths | Berth 4,000    
Percentage of capacity to fleet 8.00%    
Minimum      
Schedule Of Significant Accounting Policies [Line Items]      
Final payment period before voyage 75 days    
Maximum      
Schedule Of Significant Accounting Policies [Line Items]      
Final payment period before voyage 180 days    
Revenue      
Schedule Of Significant Accounting Policies [Line Items]      
Concentration risk, benchmark No other individual country's revenues exceed 10% in any given period.    
Revenue | Minimum      
Schedule Of Significant Accounting Policies [Line Items]      
Percentage of revenue attributable to U.S.- sourced passengers 75.00%    
Revenue | Maximum      
Schedule Of Significant Accounting Policies [Line Items]      
Percentage of revenue attributable to U.S.- sourced passengers 80.00%