Quarterly report pursuant to Section 13 or 15(d)

Equity-Based Compensation (Details 3)

v3.3.0.814
Equity-Based Compensation (Details 3) - Stock options - USD ($)
$ / shares in Units, $ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Stock options      
Outstanding at the beginning of the period (in shares) 81,021    
Options granted (in shares) 665,366    
Options cancelled (in shares) (3,833)    
Outstanding at the end of the period (in shares) 742,554   81,021
Expected to vest (in shares) 742,554    
Exercisable (in shares) 25,339    
Weighted average exercise price      
Outstanding at the beginning of the period (in dollars per share) $ 53.92    
Options granted (in dollars per share) 50.00    
Options cancelled (in dollars per share) 50.00    
Outstanding at the end of the period (in dollars per share) 50.43   $ 53.92
Expected to vest (in dollars per share) 50.43    
Exercisable (in dollars per share) $ 54.15    
Weighted average remaining contractual life      
Outstanding 9 years 4 months 21 days   8 years 11 months 1 day
Expected to vest 9 years 4 months 21 days    
Exercisable 8 years 15 days    
Weighted-average assumptions used to calculate fair value of stock options granted      
Volatility (as a percent) 40.00% 40.00%  
Risk-free interest rate (as a percent) 1.66% 1.75%  
Expected life 6 years 3 months 5 years 6 months  
Weighted average fair value of options granted (in dollars per share) $ 14.74 $ 20.55  
Additional disclosures      
Unrecognized stock-based compensation expense $ 9.3    
Weighted average period for recognizing unrecognized stock-based compensation expense 3 years 4 months 24 days    
Minimum      
Stock-based compensation      
Vesting period 1 year    
Maximum      
Stock-based compensation      
Vesting period 4 years    
Contractual life 10 years