Net Income Per Share - Computation of Basic and Diluted Net Income Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Earnings Per Share [Abstract]
Net income	$ 511	$ 2,024
Weighted average common basic shares	40,970	40,910
Effect of dilutive securities	313	29
Weighted average common dilutive shares	41,283	40,939
Basic and diluted net income per share	$ 0.01	$ 0.05