Earnings Per Share - Schedule of Computations of Basic and Diluted Earnings (Loss) Per Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Numerator:
Net income (loss)	$ 8,431	$ (9,981)	$ 14,917	$ (15,008)
Change in the value of Private Placement Warrants	(858)	12,605	(1,190)	21,658
Net income (loss) Attributable to Parent	$ 7,573	$ (9,981)	$ 13,727	$ (15,008)
Common Shares [Member]
Denominator:
Weighted average common shares outstanding-basic	10,794,229	10,266,176	10,676,792	9,536,687
Incremental shares from assumed exercise of Private Placement Warrants, SAR, restricted stock and contingent consideration	373,369		448,324
Weighted average common shares outstanding-diluted	11,167,598	10,266,176	11,125,116	9,536,687
Earnings (loss) per share of common stock - basic and diluted
Earnings (loss) per share of common stock - basic	$ 0.78	$ (0.97)	$ 1.40	$ (1.57)
Earnings (loss) per share of common stock - diluted	$ 0.68	$ (0.97)	$ 1.23	$ (1.57)