Net Income (Loss) Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Numerator:
Net income (loss) used in computing basic and diluted net income (loss) per share	$ 2,253	$ (219)
Denominator:
Shares used in computation of basic net income (loss) per share (weighted average common shares outstanding)	27,424	27,941
Dilutive potential common shares:
Shares used in computation of diluted net income (loss) per share	28,294	27,941
Basic net income (loss) per share	$ 0.08	$ (0.01)
Diluted net income (loss) per share	$ 0.08	$ (0.01)
Restricted Stock and RSUs [Member]
Dilutive potential common shares:
Dilutive potential common shares	303	0
Stock Options [Member]
Dilutive potential common shares:
Dilutive potential common shares	567	0