Annual report pursuant to Section 13 and 15(d)

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

v3.10.0.1
Employee Benefits and Share-Based Compensation - (Detail Textuals) - USD ($)
1 Months Ended 12 Months Ended
May 31, 2016
Jan. 31, 2013
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Apr. 30, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Maximum percentage of employee eligible compensation that may be contributed towards 401(k)     100.00%      
Matching contributions vesting period     5 years      
Forfeited contributions utilized     $ 300,000 $ 300,000 $ 100,000  
Recorded expenses related to 401k plan and SERP     $ 9,300,000 $ 7,300,000 $ 6,400,000  
Discount rate used in the net periodic benefit cost calculation     3.60% 4.00% 4.30%  
Amortization period of losses     18 years 11 months 5 days      
Total taxes paid pursuant to net share settlements     $ 13,855,000 $ 6,342,000    
Retained Earnings            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Net cumulative effect of change in accounting policy (forfeitures)       2,200,000    
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% of each participant's contributions            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Employer matching contribution percent     50.00%      
Amounts greater than 3% of each participant's contributions | Minimum            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Defined contribution plan, percentage of employee contribution     3.00%      
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]            
Number of shares authorized to repurchase           2,000,000
Percentage of purchase price discount     15.00%      
Accrued payroll liability     $ 1,900,000 1,500,000    
Shipboard Retirement Plan            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Projected benefit obligation included in accrued expenses and other liabilities     1,000,000 1,100,000    
Projected benefit obligation included in other long term liabilities     23,300,000 23,500,000    
Options            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Total intrinsic value of stock options exercised     16,700,000 18,900,000 $ 5,200,000  
Proceeds from the exercise of share options     $ 25,800,000 $ 27,400,000 $ 7,600,000  
Time Based Options            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Share based award, vesting period 3 years          
Number of share option awards granted     0      
Exercise price of share options granted     $ 0      
Weighted average period for recognition of unrecognized compensation expense     4 months 24 days      
Weighted-average grant-date fair value of options granted         $ 17.11  
Total unrecognized compensation cost related to share options granted     $ 2,900,000      
Time Based Options | 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 Options | 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 Options | 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 Options            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Share based award, vesting period 3 years          
Number of share option awards granted     208,335      
Exercise price of share options granted     $ 59.43      
Weighted average period for recognition of unrecognized compensation expense     0 years      
Weighted-average grant-date fair value of options granted     $ 15.20 $ 8.55 $ 8.67  
Total unrecognized compensation cost related to share options granted     $ 0      
Performance Based Options | Amendment to employment agreement            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Number of share option awards granted     208,335      
Market Based Share Option Awards            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Number of share option awards granted     0      
Exercise price of share options granted     $ 0      
Weighted average period for recognition of unrecognized compensation expense     0 years      
Total unrecognized compensation cost related to share options granted     $ 0      
Restricted Stock            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Total fair value of shares vested       $ 100,000 $ 1,100,000  
Description of share-based awards vesting period     equal installments over four years and are expected to vest on January 1, 2019      
"Time-Based Units" ("TBUs")            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Total unrecognized compensation cost related to restricted share unit awards     $ 97,700,000      
Weighted average period for recognition of unrecognized compensation expense     1 year 9 months 18 days      
"Time-Based Units" ("TBUs") | Employee | Awarded on March 1, 2018            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Share based award, vesting period     3 years      
Restricted share unit awards granted     1,600,000      
"Performance-Based Units" ("PBUs")            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Total unrecognized compensation cost related to restricted share unit awards     $ 25,800,000      
Weighted average period for recognition of unrecognized compensation expense     1 year 10 months 24 days      
Total taxes paid pursuant to net share settlements     $ 300,000      
"Performance-Based Units" ("PBUs") | Management | Awarded on March 1, 2018            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Restricted share unit awards granted     500,000      
Market-based RSUs            
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