Stock-based Compensation (Tables)
 12 Months Ended
Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Compensation, Restricted Stock Units Award Activity
The following table presents information regarding outstanding RSAs as of December 31, 2015 and changes during the year then ended, after giving effect to the conversion of restricted Class C common stock to restricted Class A common stock on a 178.8491-for-one basis:
 
 
Number of RSAs Outstanding
 
Weighted Average Grant Date Fair Value Per Share
 
Aggregate Intrinsic Value
(in millions)
Balance at January 1, 2015
 
5,606,918

 
$
0.12

 
 
Granted
 
6,303,519

 
0.21

 
 
Forfeited
 
(4,135,883
)
 
0.15

 
 
Balance at December 31, 2015
 
7,774,554

 
$
0.18

 
$
43.5
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity
The following table presents information regarding outstanding RSUs as of December 31, 2015 and changes during the year then ended, after taking into effect to the conversion of restricted Class C common stock to restricted Class A common stock on a 178.8491-for-one basis:
 
 
Number of RSUs Outstanding
 
Aggregate Intrinsic Value
(in millions)
 
Weighted Average 
Remaining
Contractual Life (In Years)
Balance at January 1, 2015
 
277,216

 
 
 
 
Granted
 
2,593,833

 
 
 
 
Converted
 
(12,500
)
 
 
 
 
Forfeited
 
(12,500
)
 
 
 
 
Balance at December 31, 2015
 
2,846,049

 
$
15.9

 
2.2