Equity Based Compensation - Summary of Option Activity for Stock Options (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 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, Exercised	(2,500)
Shares, Expired	(5,000)
Shares, Outstanding, Ending Balance	600,000	607,500
Shares, Exercisable	595,000
Shares, Expected to vest	4,977
Weighted Average Exercise Price, Outstanding, Beginning Balance	$ 8.88
Weighted Average Exercise Price, Exercised	$ 7.34
Weighted Average Exercise Price, Expired	$ 37.46
Weighted Average Exercise Price, Outstanding, Ending Balance	$ 8.65	$ 8.88
Weighted Average Exercise Price, Exercisable	$ 8.67
Weighted Average Exercise Price, Expected to vest	$ 6.23
Weighted Average Remaining Contractual Life (Yrs.), Outstanding	5 years 7 months 2 days	6 years 15 days
Weighted Average Remaining Contractual Life (Yrs.), Exercisable	5 years 6 months 26 days
Weighted Average Remaining Contractual Life (Yrs.), Expected to vest	7 years 1 month 2 days
Aggregate Intrinsic Value, Exercised	$ 70
Aggregate Intrinsic Value, Outstanding	15,890
Aggregate Intrinsic Value, Exercisable	15,746
Aggregate Intrinsic Value, Expected to vest	$ 143