Equity-Based Compensation - Schedule of Activity Related to Stock Option Awards (Detail) - Long-Term Incentive Options [Member] $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, granted | shares	2,409,282
Options, Forfeited | shares	(88,144)
Options, Outstanding, Ending Balance | shares	2,321,138
Options, Exercisable at September 30, 2015 | shares	0
Weighted Average Exercise Price, Granted	$ 19.20
Weighted Average Exercise Price, Forfeited	18.96
Weighted Average Exercise Price, Outstanding, Ending Balance	19.21
Weighted Average Exercise Price, Exercisable at September 30, 2015	$ 0
Weighted Average Remaining Contractual Life, Outstanding at September 30, 2015	9 years 6 months 22 days
Aggregate Intrinsic Value, Outstanding at September 30, 2015 | $	$ 101
Aggregate Intrinsic Value, Exercisable at September 30, 2015 | $	$ 0