Net (Loss) Income Per Share - Computation of Basic and Diluted Net (Loss) Income Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Earnings Per Share [Abstract]
Net (loss) income	$ (19,899)	$ 315	$ (25,404)	$ 801
Weighted average common basic shares	41,064	41,020	41,062	41,018
Effect of dilutive securities		364		329
Weighted average common dilutive shares	41,064	41,384	41,062	41,347
Basic and diluted net (loss) income per share	$ (0.48)	$ 0.01	$ (0.62)	$ 0.02