Net Income (Loss) per Share - Computation of Basic and Diluted Net Loss Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Numerator:
Net income (loss)	$ 579	$ 5,142	$ 10,774	$ (6,459)
Denominator:
Weighted-average shares outstanding	131,951	131,951	131,951	131,951
Effect of dilutive securities:
Stock options	391	633	506
Weighted-average shares outstanding for diluted income (loss) per share	132,342	132,584	132,457	131,951
Net income (loss) per share:
Basic	$ 0.00	$ 0.04	$ 0.08	$ (0.05)
Diluted	$ 0.00	$ 0.04	$ 0.08	$ (0.05)