CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Net revenues	[1]	$ 278,589	$ 207,636	$ 786,671	$ 615,210
Cost of net revenues		69,387	50,060	191,626	147,910
Gross profit		209,202	157,576	595,045	467,300
Operating expenses:
Selling, general and administrative		126,708	101,751	360,385	290,657
Research and development		20,415	17,779	54,111	47,348
Total operating expenses		147,123	119,530	414,496	338,005
Income from operations		62,079	38,046	180,549	129,295
Interest and other income (expenses), net		1,463	(1,568)	1,161	(2,846)
Net income before provision for income taxes and equity in losses of investee		63,542	36,478	181,710	126,449
Provision for income taxes		11,698	8,862	39,172	31,306
Equity in losses of investee, net of tax		477	0	477	0
Net income		$ 51,367	$ 27,616	$ 142,061	$ 95,143
Net income per share:
Basic (in usd per share)		$ 0.64	$ 0.35	$ 1.78	$ 1.19
Diluted (in usd per share)		$ 0.63	$ 0.34	$ 1.74	$ 1.17
Shares used in computing net income per share:
Basic (in shares)		79,977	79,808	79,920	80,173
Diluted (in shares)		81,466	81,092	81,523	81,576

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