Equity Based Compensation - Summary of Option Activity for Stock Options (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Shares, Outstanding, Beginning Balance	607,500
Shares, Granted
Shares, Exercised	(2,500)
Shares, Expired	(5,000)
Shares, Forfeited
Shares, Outstanding, Ending Balance	600,000	607,500
Shares, Exercisable	600,000
Shares, Expected to vest
Weighted Average Exercise Price, Outstanding, Beginning Balance	$ 8.88
Weighted Average Exercise Price, Granted
Weighted Average Exercise Price, Exercised	$ 7.34
Weighted Average Exercise Price, Expired	$ 37.46
Weighted Average Exercise Price, Forfeited
Weighted Average Exercise Price, Outstanding, Ending Balance	$ 8.65	$ 8.88
Weighted Average Exercise Price, Exercisable	$ 8.65
Weighted Average Exercise Price, Expected to vest
Weighted Average Remaining Contractual Life (Yrs.), Outstanding	5 years 3 months 29 days	6 years 15 days
Weighted Average Remaining Contractual Life (Yrs.), Exercisable	5 years 3 months 29 days
Weighted Average Remaining Contractual Life (Yrs.), Expected to vest	0 years
Aggregate Intrinsic Value, Exercised	$ 70
Aggregate Intrinsic Value, Outstanding	13,400
Aggregate Intrinsic Value, Exercisable	13,400
Aggregate Intrinsic Value, Expected to vest