Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Details 2)

v3.10.0.1
Summary of Significant Accounting Policies (Details 2) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]    
Prepaid expenses and other assets $ 329,135 $ 216,065
Total assets 15,329,646 14,094,869
Advance ticket sales 1,951,701 1,303,498
Total liabilities and shareholders' equity 15,329,646 $ 14,094,869
Adjustments    
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]    
Prepaid expenses and other assets, Adjustments (81,936)  
Total assets, Adjustments (81,936)  
Advance ticket sales, Adjustments (81,936)  
Total liabilities and shareholders' equity, Adjustments (81,936)  
Balances without adoption of Topic 606    
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]    
Prepaid expenses and other assets 247,199  
Total assets 15,247,710  
Advance ticket sales 1,869,765  
Total liabilities and shareholders' equity $ 15,247,710