Annual report pursuant to Section 13 and 15(d)

Employee Benefits and Share-Based Compensation - (Details)

v3.20.4
Employee Benefits and Share-Based Compensation - (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 12 Months Ended
Jul. 27, 2020
Mar. 02, 2020
May 31, 2016
Apr. 30, 2014
Jan. 31, 2013
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
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 $ 200 $ 300
Recorded expenses related to 401(k) plan           $ 2,800 $ 9,100 $ 9,300
Discount rate used in the net periodic benefit cost calculation           3.20% 4.20% 3.60%
Amortization period of losses           18 years 6 months 25 days    
Total taxes paid pursuant to net share settlements           $ 15,407 $ 20,939 $ 13,855
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           $ 1,400 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]                
Plan assets           0    
Projected benefit obligation included in accrued expenses and other liabilities           900    
Projected benefit obligation included in other long-term liabilities           30,700 27,800  
Options                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Total intrinsic value of stock options exercised           600 13,300 16,700
Proceeds from the exercise of share options           2,200 $ 28,300 $ 25,800
Total unrecognized compensation cost related to share options 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]                
Weighted-average grant-date fair value of options granted               $ 15.20
Time-Based RSU Awards                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Share awards granted           5,380,123    
Total unrecognized compensation cost related to restricted share unit awards           $ 127,800    
Weighted-average period for recognition of unrecognized compensation expense           1 year 8 months 12 days    
Time-Based RSU Awards | Employee | Awarded on March 2, 2020                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Share-based award, vesting period   3 years            
Share awards granted   2,400,000            
Time-Based RSU Awards | Employee | Awarded on July 27, 2020                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Share awards granted 2,500,000              
Performance-Based RSU Awards                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Share awards granted           945,598    
Total unrecognized compensation cost related to restricted share unit awards           $ 6,100    
Weighted-average period for recognition of unrecognized compensation expense           1 year    
Performance-Based RSU Awards | Members of management team | Awarded on March 2, 2020                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Share awards granted   600,000            
Performance-Based RSU Awards | Members of management team | Awarded on July 27, 2020                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Share awards granted 300,000              
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    
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