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		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share Basic And Diluted [Abstract]
Net income (loss)	$ 8,735	$ 5,073	$ 13,123	$ 4,116
Denominator:
Weighted average common shares outstanding, basic	89,276,794	87,074,952	88,982,009	86,768,686
Basic earnings per share:
Net income (loss) per share, basic	$ 0.10	$ 0.06	$ 0.15	$ 0.05
Net income (loss)	$ 8,735	$ 5,073	$ 13,123	$ 4,116
Denominator:
Weighted average common shares outstanding, basic	89,276,794	87,074,952	88,982,009	86,768,686
Dilutive securities:
Stock options and restricted stock units	1,925,938	2,153,838	2,092,928	1,379,228
Weighted average common shares outstanding, diluted	91,202,732	89,228,790	91,074,937	88,147,914
Diluted earnings per share:
Net income (loss) per share, diluted	$ 0.10	$ 0.06	$ 0.14	$ 0.05