The Company and Significant Accounting Policies - Reconciliation of Basic and Diluted Income (Loss) Per Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Earnings Per Share Basic And Diluted [Abstract]
Net income (loss)	$ 4,388	$ (957)
Denominator:
Weighted average common shares outstanding, basic	88,683,948	86,459,017
Per share:
Net income (loss) per share	$ 0.05	$ (0.01)
Net income (loss)	$ 4,388	$ (957)
Denominator:
Weighted average common shares outstanding	88,683,948	86,459,017
Dilutive securities:
Stock options and restricted stock units	2,259,918
Weighted average common shares outstanding, diluted	90,943,866	86,459,017
Per share:
Net income (loss) per share	$ 0.05	$ (0.01)