Basis of Presentation (Details) (USD $)
1 Months Ended
Nov. 30, 2014
Mar. 31, 2015
Dec. 31, 2014
Oct. 31, 2014
Related Party Transaction [Line Items]        
Due to related-party $ 684,800,000      
Repayments of related-party debt 156,500,000      
Related-party debt, proceeds from IPO 56,500,000      
Repayments of related-party debt, release of collateral 100,000,000      
Credit card receivables   19,000,000 9,600,000  
Credit Card Holdbacks   32,500,000 0  
Credit card holdbacks and receivables   51,525,000 9,563,000  
Convertible Preferred Stock Converted to Common Stock        
Related Party Transaction [Line Items]        
Conversion of stock number of shares converted 1,950,937      
Conversion ratio 1      
Common Class A Stock Converted to Common Stock        
Related Party Transaction [Line Items]        
Conversion of stock number of shares converted 1,950,937      
Conversion ratio 1      
Common Class A-1 Stock Converted to Common Stock        
Related Party Transaction [Line Items]        
Conversion of stock number of shares converted 1,950,937      
Conversion ratio 1      
Common Class B Stock Converted to Common Stock        
Related Party Transaction [Line Items]        
Conversion of stock number of shares converted 1,950,937      
Conversion ratio 1      
Common Class C Stock Converted to Common Stock        
Related Party Transaction [Line Items]        
Conversion of stock number of shares converted 1,950,937      
Conversion ratio 1      
Common Class G Stock Converted to Common Stock        
Related Party Transaction [Line Items]        
Conversion of stock number of shares converted 1,950,937      
Conversion ratio 1      
Related-Party Warrants Converted to Common Stock | Related-Party Warrant        
Related Party Transaction [Line Items]        
Number of related-party warrants exchanged for common stock 26,067,475      
Conversion of stock number of shares issued 5,742,543      
Number of canceled shares of common stock 16,175,126      
Principal Owner | Exchange of certain Related-Party Notes for common stock        
Related Party Transaction [Line Items]        
Debt conversion number of shares issued 22,159,070      
Virgin Group | Principal Owner        
Related Party Transaction [Line Items]        
Fair value of related party debt 38,500,000     728,300,000
Virgin Group | Principal Owner | Post-IPO Note Issued for Extinguishment of Previous Debt        
Related Party Transaction [Line Items]        
Fair value of related party debt 50,000,000      
Extinguishment of debt 50,000,000      
Fair value of related party debt 38,500,000      
Cyrus Capital | Principal Owner | Exchange of certain Related-Party Notes for common stock        
Related Party Transaction [Line Items]        
Converted instrument premium (percent) 117.00%      
Virgin Group | Line of Credit | Letter of Credit        
Related Party Transaction [Line Items]        
Maximum borrowing capacity   $ 100,000,000