Annual report pursuant to Section 13 and 15(d)

Employee Benefits and Share-Based Compensation - (Textuals) (Details)

v3.19.3.a.u2
Employee Benefits and Share-Based Compensation - (Textuals) (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 12 Months Ended 36 Months Ended
Mar. 01, 2019
May 31, 2016
Apr. 30, 2014
Jan. 31, 2013
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Maximum percentage of employee eligible compensation that may be contributed towards 401(k) Plan         100.00%      
Matching contributions vesting period         5 years      
Forfeited contributions utilized         $ 200 $ 300 $ 300  
Recorded expenses related to 401(k) plan         $ 9,100 $ 9,300 $ 7,300  
Discount rate used in the net periodic benefit cost calculation         4.20% 3.60% 4.00%  
Amortization period of losses         18 years 10 months 28 days      
Total taxes paid pursuant to net share settlements         $ 20,939 $ 13,855 $ 6,342  
First 3% of Each Participant's Contributions                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Defined contribution plan, percentage of employee contribution         3.00%      
Employer matching contribution percent         100.00%      
Amounts Greater Than 3%                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Defined contribution plan, percentage of employee contribution         50.00%      
Amounts Greater Than 3% | Minimum                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Employer matching contribution percent         3.00%      
Amounts Greater Than 3% | Maximum                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Employer matching contribution percent         10.00%      
Restated 2013 Performance Incentive Plan                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Number of additional shares authorized   12,430,000            
Ordinary shares authorized       15,035,106        
Maximum number of shares that can be granted   27,465,106            
Maximum number of shares that can be granted to one individual       5,000,000        
Employee Stock Purchase Plan                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Percentage of purchase price discount         15.00%      
Accrued payroll liability         $ 2,100 1,900   $ 2,100
Employee Stock Purchase Plan | Maximum                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Number of additional shares authorized     2,000,000          
Shipboard Retirement Plan                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Projected benefit obligation included in accrued expenses and other liabilities         900 1,000   900
Projected benefit obligation included in other long-term liabilities         27,800 23,300   27,800
Options                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Total intrinsic value of stock options exercised         13,300 16,700 18,900  
Proceeds from the exercise of share options         28,300 $ 25,800 $ 27,400  
Total unrecognized compensation cost related to share options granted         $ 0     $ 0
Time-Based Option Awards                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Number of share option awards granted               0
Time-Based Option Awards | Restated 2013 Performance Incentive Plan                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Description of share-based awards vesting period   The vesting period for time-based options is typically set at three, four or five years with a contractual life ranging from seven to 10 years            
Time-Based Option Awards | Restated 2013 Performance Incentive Plan | Employee | Option Vesting Period, Three Years                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Share-based award, vesting period   3 years            
Time-Based Option Awards | Restated 2013 Performance Incentive Plan | Employee | Option Vesting Period, Four Years                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Share-based award, vesting period   4 years            
Time-Based Option Awards | Restated 2013 Performance Incentive Plan | Employee | Option Vesting Period, Five Years                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Share-based award, vesting period   5 years            
Time-Based Option Awards | Restated 2013 Performance Incentive Plan | Minimum                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Share-based award, contractual life   7 years            
Time-Based Option Awards | Restated 2013 Performance Incentive Plan | Maximum                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Share-based award, contractual life   10 years            
Performance-Based Option Awards                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Number of share option awards granted         0      
Weighted-average grant-date fair value of options granted           $ 15.20 $ 8.55  
Time-Based RSU Awards                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Restricted share unit awards granted         1,929,495      
Total unrecognized compensation cost related to restricted share unit awards         $ 106,500     $ 106,500
Weighted-average period for recognition of unrecognized compensation expense         1 year 9 months 18 days      
Time-Based RSU Awards | Employee | Awarded on March 1, 2019                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Restricted share unit awards granted 1,900,000              
Share-based award, vesting period 3 years              
Performance-Based RSU Awards                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Restricted share unit awards granted         462,282      
Total unrecognized compensation cost related to restricted share unit awards         $ 9,200     9,200
Weighted-average period for recognition of unrecognized compensation expense         1 year 1 month 6 days      
Performance-Based RSU Awards | Members of management team | Awarded on March 1, 2019                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Restricted share unit awards granted 500,000              
Market-Based RSU Awards                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Total unrecognized compensation cost related to restricted share unit awards         $ 0     $ 0
Weighted-average period for recognition of unrecognized compensation expense         0 years      
Restricted Share Units                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Share-based award, vesting period   3 years