CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Net revenues	[1]	$ 269,362	$ 209,488	$ 508,082	$ 407,574
Cost of net revenues		64,146	50,854	122,239	97,850
Gross profit		205,216	158,634	385,843	309,724
Operating expenses:
Selling, general and administrative		121,467	100,625	233,677	188,906
Research and development		18,613	15,684	33,696	29,569
Total operating expenses		140,080	116,309	267,373	218,475
Income from operations		65,136	42,325	118,470	91,249
Interest and other income (expenses), net		125	174	(302)	(1,278)
Net income before provision for income taxes		65,261	42,499	118,168	89,971
Provision for income taxes		15,113	11,149	27,474	22,444
Net income		$ 50,148	$ 31,350	$ 90,694	$ 67,527
Net income per share:
Basic (in usd per share)		$ 0.63	$ 0.39	$ 1.14	$ 0.84
Diluted (in usd per share)		$ 0.62	$ 0.39	$ 1.11	$ 0.83
Shares used in computing net income per share:
Basic (in shares)		79,951	80,257	79,891	80,358
Diluted (in shares)		81,281	81,394	81,440	81,729

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