Equity-Based Compensation - Summary of Unvested Holdings Unit Activity (Detail) - Unvested Holdings Units [Member] $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Units Outstanding at beginning of period | shares	1,805,783
Units forfeited | shares	(126,482)
Units vested | shares	(654,285)
Units Outstanding at end of period | shares	1,025,016
Weighted average grant date fair value, Outstanding at beginning of period | $ / shares	$ 1.52
Weighted average grant date fair value, Units forfeited | $ / shares	1.52
Weighted average grant date fair value, Units vested | $ / shares	1.52
Weighted average grant date fair value, Outstanding at end of period | $ / shares	$ 1.52
Weighted average remaining contractual term (years), Outstanding at end of period	1 year 4 months 24 days
Aggregate intrinsic value, Outstanding at end of period | $	$ 20,603