CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Net revenues	$ 136,496	[1]	$ 125,894	[1]	$ 417,201	[1]	$ 350,836	[1]
Cost of net revenues	36,146		33,524		107,291		85,103
Gross profit	100,350		92,370		309,910		265,733
Operating expenses:
Sales and marketing	36,468		34,655		114,272		106,062
General and administrative	23,892		21,609		68,670		66,695
Research and development	9,952		8,926		31,158		27,586
Impairment of goodwill	24,665		0		24,665		0
Amortization of acquired intangible assets	870		868		2,624		1,460
Total operating expenses	95,847		66,058		241,389		201,803
Profit from operations	4,503		26,312		68,521		63,930
Interest and other income (expense), net	(353)		(118)		(624)		(335)
Net profit before provision for income taxes	4,150		26,194		67,897		63,595
Provision for income taxes	4,494		6,930		18,765		17,328
Net profit (loss)	$ (344)		$ 19,264		$ 49,132		$ 46,267
Net profit (loss) per share:
Basic (in usd per share)	$ 0.00		$ 0.25		$ 0.61		$ 0.60
Diluted (in usd per share)	$ 0.00		$ 0.24		$ 0.59		$ 0.58
Shares used in computing net profit (loss) per share:
Basic (in shares)	81,437		78,455		80,356		77,735
Diluted (in shares)	81,437		80,266		83,016		80,040

[1] Net Revenues are attributed to countries based on location of where revenue is recognized.