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Related Party Transactions (Details)
$ in Millions
 3 Months Ended
Aug. 26, 2016
Mar. 31, 2017
USD ($)
aircraft
Mar. 31, 2016
USD ($)
Dec. 31, 2016
USD ($)
Related Party Transaction [Line Items]        
Aircraft, held-for-sale | aircraft   2    
Conversion ratio, preferred stock to common stock 1      
Percentage of tax benefits realized payable (as a percent)   85.00%    
Percentage retained under tax receivable agreement (as a percent)   15.00%    
Tax receivable agreement, liability   $ 124.6   $ 124.6
Time period over which the cash savings is expected to be realized (in years)   20 years    
Expected TRA payment   $ 2.1    
Estimated termination payment   $ 98.4    
Discount rate tax receivable agreement liability (as a percent)   5.71%    
Affiliated Entity        
Related Party Transaction [Line Items]        
Rent expense   $ 1.8 $ 2.7