Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Detail Textuals)

v3.6.0.2
Summary of Significant Accounting Policies (Detail Textuals)
$ in Thousands, shares in Millions
 12 Months Ended
Dec. 31, 2016
USD ($)
CruiseShip
segment
shares
Dec. 31, 2015
USD ($)
CruiseShip
shares
Dec. 31, 2014
USD ($)
shares
Schedule Of Significant Accounting Policies [Line Items]      
Allowance for doubtful accounts $ 4,700 $ 3,700  
Advertising costs included in prepaid expenses and other assets 1,300 3,400  
Expenses related to advertising costs $ 270,500 $ 232,200 $ 122,500
Antidilutive securities excluded from computation of earnings per share | shares 7.1 2.8 3.2
Reduction in estimated residual values, percentage 15.00%    
Amounts of tax included on a gross basis $ 286,600 $ 243,800 $ 240,700
Foreign currency transaction gain $ 4,500 11,000 $ 6,000
Number of reportable segments | segment 1    
Number of cruises ships | CruiseShip 24    
Ship, carrying value $ 10,117,689 9,458,805  
Increase in accrued liabilities and decrease in accounts payable 7,200 (5,900)  
Goodwill 1,388,931 $ 1,388,931  
Oceania Cruises      
Schedule Of Significant Accounting Policies [Line Items]      
Goodwill 523,000    
Regent Seven Seas      
Schedule Of Significant Accounting Policies [Line Items]      
Goodwill 462,100    
Norwegian Reporting Units      
Schedule Of Significant Accounting Policies [Line Items]      
Goodwill $ 403,800    
Sales Revenue, Net      
Schedule Of Significant Accounting Policies [Line Items]      
Revenue attributable to North American guests 81.00% 75.00% 73.00%
Concentration Risk, Additional Characteristic No other individual country's revenues exceeded 10% in any of our last three years.    
Bahamas Registry      
Schedule Of Significant Accounting Policies [Line Items]      
Number of cruises ships | CruiseShip 16    
Ship, carrying value $ 7,100,000 $ 7,200,000  
Marshall Island Registry      
Schedule Of Significant Accounting Policies [Line Items]      
Number of cruises ships | CruiseShip 7 6  
Ship, carrying value $ 1,900,000 $ 1,400,000  
U.S. Registry      
Schedule Of Significant Accounting Policies [Line Items]      
Number of cruises ships | CruiseShip 1    
Ship, carrying value $ 300,000 $ 300,000