Equity-Based Compensation (Details 3) - Stock options - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Stock-based compensation
Contractual life	10 years
Stock options
Outstanding at the beginning of the period (in shares)	81,021
Options granted (in shares)	665,366
Options forfeited (in shares)	(25,500)
Outstanding at the end of the period (in shares)	720,887	81,021
Vested or expected to vest (in shares)	720,887
Exercisable (in shares)	51,021
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 forfeited (in dollars per share)	50.00
Outstanding at the end of the period (in dollars per share)	50.44	$ 53.92
Vested or expected to vest (in dollars per share)	50.44
Exercisable (in dollars per share)	$ 53.79
Weighted average remaining contractual life
Outstanding	9 years 1 month 21 days	8 years 11 months 1 day
Vested or expected to vest	9 years 1 month 21 days
Exercisable	8 years
Weighted-average assumptions used to calculate fair value of stock options granted
Volatility (as a percent)	40.00%	40.00%	35.00%
Risk-free interest rate (as a percent)	1.66%	1.75%	1.48%
Expected life	6 years 3 months	5 years 6 months	6 years 2 months 1 day
Weighted average fair value of options granted (in dollars per share)	$ 14.74	$ 20.55	$ 20.20
Additional disclosures
Unrecognized stock-based compensation expense	$ 8.3
Weighted average period for recognizing unrecognized stock-based compensation expense	3 years 2 months 12 days
Minimum
Stock-based compensation
Vesting period	1 year
Maximum
Stock-based compensation
Vesting period	4 years