Basis Of Presentation (Tables)

9 Months Ended

Sep. 30, 2012

Basis Of Presentation [Abstract]

Reconciliation Of The Numerator And Denominators Of The Basic And Diluted Net Income Per Share Computations

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
		2012		2011		2012		2011
Numerator:
Net income (loss)	$	(13,542)	$	10,230	$	5,757	$	16,062
Denominator:
Weighted-average shares outstanding used to
compute basic net income (loss) per share		56,617		58,331		57,184		54,044
Effect of dilutive securities		—		2,106		1,977		2,382
Weighted-average shares outstanding used to
compute diluted net income (loss) per share		56,617		60,437		59,161		56,426
Basic net income (loss) per share	$	(0.24)	$	0.18	$	0.10	$	0.30
Diluted net income (loss) per share	$	(0.24)	$	0.17	$	0.10	$	0.28