Equity-Based Compensation - Schedule of Activity Related to Stock Option Awards (Detail) - Jun. 30, 2015 - Long-Term Incentive Options [Member] - USD ($) $ / shares in Units, $ in Thousands	Total
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, granted	1,992,594
Options, Exercised	0
Options, Forfeited	(58,166)
Options, Outstanding, Ending Balance	1,934,428
Options, Exercisable at June 30, 2015	0
Weighted Average Exercise Price, Granted	$ 19.53
Weighted Average Exercise Price, Exercised	0
Weighted Average Exercise Price, Forfeited	18.96
Weighted Average Exercise Price, Outstanding, Ending Balance	19.55
Weighted Average Exercise Price, Exercisable at June 30, 2015	$ 0
Weighted Average Remaining Contractual Life, Outstanding at June 30, 2015	9 years 8 months 12 days
Aggregate Intrinsic Value, Outstanding at June 30, 2015	$ 8,710
Aggregate Intrinsic Value, Exercisable at June 30, 2015	$ 0