Summary of Significant Accounting Policies (Tables)
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12 Months Ended |
Dec. 31, 2019 |
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| Accounting Policies [Abstract] |
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| Schedule of reconciliation between basic and diluted EPS |
A reconciliation between basic and diluted earnings per share was as follows (in thousands, except share and per share data): | | | | | | | | | | | | Year Ended December 31, | | | 2019 | | 2018 | | 2017 | Net income | | $ | 930,228 | | $ | 954,843 | | $ | 759,872 | Basic weighted-average shares outstanding | | | 214,929,977 | | | 223,001,739 | | | 228,040,825 | Dilutive effect of share awards | | | 1,545,099 | | | 1,417,466 | | | 1,377,501 | Diluted weighted-average shares outstanding | | | 216,475,076 | | | 224,419,205 | | | 229,418,326 | Basic earnings per share | | $ | 4.33 | | $ | 4.28 | | $ | 3.33 | Diluted earnings per share | | $ | 4.30 | | $ | 4.25 | | $ | 3.31 |
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| Schedule of estimated residual values of ships |
Depreciation is computed on a straight-line basis over the estimated useful lives of the assets, after a 15% reduction for the estimated residual values of ships as follows: | | | | | Useful Life | Ships | | 30 years | Computer hardware and software | | 3‑10 years | Other property and equipment | | 3‑40 years | Leasehold improvements | | Shorter of lease term or asset life | Ship improvements | | Shorter of asset life or life of the ship |
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| Schedule of revenues by destination |
Revenues by destination consisted of the following (in thousands): | | | | | | | | | | | | Year Ended December 31, | | | 2019 | | 2018 | | 2017 | North America | | $ | 3,807,576 | | $ | 3,543,282 | | $ | 3,285,903 | Europe | | | 1,666,751 | | | 1,462,698 | | | 1,347,381 | Asia-Pacific | | | 500,842 | | | 721,404 | | | 394,631 | Other | | | 487,207 | | | 327,742 | | | 368,260 | Total revenue | | $ | 6,462,376 | | $ | 6,055,126 | | $ | 5,396,175 |
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