CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Net revenues	$ 310,341	$ 238,720
Cost of net revenues	74,716	58,093
Gross profit	235,625	180,627
Operating expenses:
Selling, general and administrative	151,148	112,210
Research and development	22,804	15,083
Total operating expenses	173,952	127,293
Income from operations	61,673	53,334
Interest and other income (expense), net	1,645	(427)
Net income before provision (benefit) for income taxes and equity in losses of investee	63,318	52,907
Provision (benefit) for income taxes	(7,223)	12,361
Equity in losses of investee, net of tax	1,121	0
Net income	$ 69,420	$ 40,546
Net income per share:
Basic (in usd per share)	$ 0.87	$ 0.51
Diluted (in usd per share)	$ 0.85	$ 0.50
Shares used in computing net income per share:
Basic (in shares)	79,904	79,831
Diluted (in shares)	81,534	81,320