Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Detail Textuals)

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Subsequent Events (Detail Textuals) - USD ($)
$ in Millions
1 Months Ended
Apr. 04, 2018
Apr. 19, 2018
Apr. 17, 2018
Mar. 31, 2018
Subsequent Event [Line Items]        
Value of shares to be issued under repurchase program       $ 263.5
Subsequent Event | Senior notes        
Subsequent Event [Line Items]        
Term loan amount $ 700.0      
Interest rate 4.75%      
Redemption amount $ 135.0      
Percentage of principal amount of redeemed 100.00%      
Debt premium amount $ 5.2      
Debt accrued interest 1.9      
Write-off deferred financing fees 1.2      
Outstanding amount-after partial redemption $ 565.0      
Subsequent Event | Share repurchase program | Board of Directors        
Subsequent Event [Line Items]        
Value of shares to be issued under repurchase program     $ 1,000.0  
Share repurchase program period     3 years  
Subsequent Event | Norwegian Bliss        
Subsequent Event [Line Items]        
Contract price percentage   80.00%    
Term loan amount   $ 850.0    
Interest rate   3.92%    
Maturity date   Apr. 19, 2030