Equity Based Compensation - Summary of Option Activity for Stock Options With Market Condition Vesting (Detail) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Shares, Outstanding, Beginning Balance	550,000
Shares, Forfeited	0
Shares, Outstanding, Ending Balance	550,000	550,000
Shares, Exercisable	550,000
Shares, Expected to vest	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price [Abstract]
Weighted Average Exercise Price, Outstanding, Beginning Balance (in usd per share)	$ 8.67
Weighted Average Exercise Price, Forfeited (in usd per share)	0.00
Weighted Average Exercise Price, Outstanding, Ending Balance (in usd per share)	8.67	$ 8.67
Weighted Average Exercise Price, Exercisable (in usd per share)	8.67
Weighted Average Exercise Price, Expected to vest (in usd per share)	$ 0.00
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted Average Remaining Contractual Life (Yrs.), Outstanding	3 years 7 months 6 days	4 years 1 month 6 days
Weighted Average Remaining Contractual Life (Yrs.), Exercisable	3 years 7 months 6 days
Aggregate Intrinsic Value, Exercised	$ 0
Aggregate Intrinsic Value, Outstanding	11,797	$ 7,848
Aggregate Intrinsic Value, Exercisable	11,797
Aggregate Intrinsic Value, Expected to vest	$ 0
Market Based Vesting Conditions [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Shares, Outstanding, Beginning Balance	73,334
Shares, Forfeited	0
Shares, Outstanding, Ending Balance	73,334	73,334
Shares, Exercisable	40,000
Shares, Expected to vest	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price [Abstract]
Weighted Average Exercise Price, Outstanding, Beginning Balance (in usd per share)	$ 25.95
Weighted Average Exercise Price, Forfeited (in usd per share)	0.00
Weighted Average Exercise Price, Outstanding, Ending Balance (in usd per share)	25.95	$ 25.95
Weighted Average Exercise Price, Exercisable (in usd per share)	25.95
Weighted Average Exercise Price, Expected to vest (in usd per share)	$ 0.00
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted Average Remaining Contractual Life (Yrs.), Outstanding	9 months 18 days	1 year 3 months 11 days
Weighted Average Remaining Contractual Life (Yrs.), Exercisable	9 months 18 days
Aggregate Intrinsic Value, Exercised	$ 0
Aggregate Intrinsic Value, Outstanding	306	$ 0
Aggregate Intrinsic Value, Exercisable	167
Aggregate Intrinsic Value, Expected to vest	$ 0