Summary of Significant Accounting Policies (Textuals) (Details)
$ in Thousands, shares in Millions |
12 Months Ended |
|
Dec. 31, 2019
USD ($)
item
segment
shares
|
Dec. 31, 2018
USD ($)
item
shares
|
Dec. 31, 2017
USD ($)
shares
|
| Schedule Of Significant Accounting Policies [Line Items] |
|
|
|
| Allowance for doubtful accounts |
$ 10,600
|
$ 9,600
|
|
| Advertising costs included in prepaid expenses and other assets |
5,900
|
800
|
|
| Expenses related to advertising costs |
$ 400,600
|
$ 327,300
|
$ 289,100
|
| Antidilutive securities excluded from computation of earnings per share | shares |
4.0
|
4.7
|
5.6
|
| Reduction in estimated residual values, percentage |
15.00%
|
|
|
| Number of reporting units | item |
3
|
|
|
| Goodwill |
$ 1,388,931
|
$ 1,388,931
|
|
| Impairment of goodwill |
0
|
|
|
| Impairment of tradenames |
$ 0
|
|
|
| Number of reportable segments | segment |
1
|
|
|
| Number of cruises ships | item |
27
|
|
|
| Ship, carrying value |
$ 13,135,337
|
12,119,253
|
|
| Foreign currency transaction (gains) losses |
$ 7,000
|
$ 19,800
|
$ 14,200
|
| Income tax expense due to reduction of deferred tax liabilities |
|
|
$ 7,400
|
| Tax Year 2017 |
|
|
|
| Schedule Of Significant Accounting Policies [Line Items] |
|
|
|
| U.S. corporate income tax rate |
|
|
35.00%
|
| Tax Year 2018 |
|
|
|
| Schedule Of Significant Accounting Policies [Line Items] |
|
|
|
| U.S. corporate income tax rate |
21.00%
|
|
|
| Oceania Cruises |
|
|
|
| Schedule Of Significant Accounting Policies [Line Items] |
|
|
|
| Goodwill |
$ 523,000
|
|
|
| Regent |
|
|
|
| Schedule Of Significant Accounting Policies [Line Items] |
|
|
|
| Goodwill |
462,100
|
|
|
| Norwegian Reporting Units [Member] |
|
|
|
| Schedule Of Significant Accounting Policies [Line Items] |
|
|
|
| Goodwill |
$ 403,800
|
|
|
| Sales Revenue, Net |
|
|
|
| Schedule Of Significant Accounting Policies [Line Items] |
|
|
|
| Concentration risk, benchmark |
No other individual country’s revenues exceeded 10% in any of our last three years.
|
No other individual country’s revenues exceeded 10% in any of our last three years.
|
No other individual country’s revenues exceeded 10% in any of our last three years.
|
| BAHAMAS Registry | Ships |
|
|
|
| Schedule Of Significant Accounting Policies [Line Items] |
|
|
|
| Number of cruises ships | item |
19
|
18
|
|
| Ship, carrying value |
$ 10,200,000
|
$ 9,100,000
|
|
| MARSHALL ISLAND Registry | Ships |
|
|
|
| Schedule Of Significant Accounting Policies [Line Items] |
|
|
|
| Number of cruises ships | item |
7
|
7
|
|
| Ship, carrying value |
$ 1,900,000
|
|
|
| United States | Sales Revenue, Net | Passenger ticket |
|
|
|
| Schedule Of Significant Accounting Policies [Line Items] |
|
|
|
| Percentage of revenue attributable to U.S.- sourced passengers |
81.00%
|
77.00%
|
77.00%
|
| United States Registry | Ships |
|
|
|
| Schedule Of Significant Accounting Policies [Line Items] |
|
|
|
| Number of cruises ships | item |
1
|
1
|
|
| Ship, carrying value |
$ 300,000
|
$ 300,000
|
|