Net (Loss) Income Per Share - Summary of Basic Net (Loss) Income Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Weighted average shares outstanding (in shares)									24,671	23,552	19,794
Less: restricted stock issued (in shares)									(76)	(160)	(254)
Basic divisor (in shares)									24,595	23,392	19,540
Dilutive shares:
Restricted stock awards (in shares)									0	0	239
Stock options (in shares)									0	0	272
Diluted divisor (in shares)									24,595	23,392	20,051
Net (loss) income	$ 6,863	$ (6,257)	$ (1,445)	$ 391	$ (2,243)	$ (6,757)	$ 3,222	$ (3,164)	$ (448)	$ (8,942)	$ 5,753
Net (loss) income per share:
Basic (in dollars per share)	$ 0.28	$ (0.26)	$ (0.06)	$ 0.02	$ (0.09)	$ (0.29)	$ 0.14	$ (0.14)	$ (0.02)	$ (0.38)	$ 0.29
Diluted (in dollars per share)	$ 0.27	$ (0.26)	$ (0.06)	$ 0.02	$ (0.09)	$ (0.29)	$ 0.14	$ (0.14)	$ (0.02)	$ (0.38)	$ 0.29