Equity-Based Compensation - Schedule of Activity Related to Stock Option Awards (Detail) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($) $ / shares shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Options, Outstanding, Beginning Balance | shares	2,274,385
Options, granted | shares	1,336,853
Options, Forfeited | shares	(53,001)
Options, Exercised | shares	(1,361)
Options, Outstanding, Ending Balance | shares	3,556,876
Options, Exercisable at March 31,2016 | shares	184,163
Weighted Average Exercise Price, Outstanding, Beginning Balance | $ / shares	$ 19.21
Weighted Average Exercise Price, Granted | $ / shares	18.17
Weighted Average Exercise Price, Forfeited | $ / shares	18.84
Weighted Average Exercise Price, Exercised | $ / shares	18.96
Weighted Average Exercise Price, Outstanding, Ending Balance | $ / shares	18.83
Weighted Average Exercise Price, Exercisable at March 31, 2016 | $ / shares	$ 18.96
Weighted Average Remaining Contractual Life, Outstanding at March 31, 2016	9 years 4 months 17 days
Weighted Average Remaining Contractual Life, Exercisable at March 31, 2016	8 years 11 months 1 day
Aggregate Intrinsic Value, Outstanding at March 31, 2016 | $	$ 7,946
Aggregate Intrinsic Value, Exercisable at March 31, 2016 | $	$ 387