CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (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
Net revenues	$ 164,506	[1]	$ 136,496	[1]	$ 481,914	[1]	$ 417,201	[1]
Cost of net revenues	39,416		36,146		120,284		107,291
Gross profit	125,090		100,350		361,630		309,910
Operating expenses:
Sales and marketing	45,224		36,468		135,352		114,272
General and administrative	27,487		24,762		84,862		71,294
Research and development	10,915		9,952		33,113		31,158
Impairment of goodwill	0		24,665		40,693		24,665
Asset Impairment Charges	0		0		26,320		0
Total operating expenses	83,626		95,847		320,340		241,389
Profit from operations	41,464		4,503		41,290		68,521
Interest and other income (expense), net	449		(353)		(874)		(624)
Net profit before provision for income taxes	41,913		4,150		40,416		67,897
Provision for income taxes	7,376		4,494		18,542		18,765
Net profit (loss)	$ 34,537		$ (344)		$ 21,874		$ 49,132
Net profit (loss) per share:
Basic (in usd per share)	$ 0.43		$ 0.00		$ 0.27		$ 0.61
Diluted (in usd per share)	$ 0.42		$ 0.00		$ 0.26		$ 0.59
Shares used in computing net profit (loss) per share:
Basic (in shares)	79,967		81,437		80,592		80,356
Diluted (in shares)	81,848		81,437		82,549		83,016
Effective Income Tax Rate, Continuing Operations	17.60%		45.90%		108.30%		27.60%

[1] .