CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Net revenues	$ 352,314	$ 600,697	$ 903,277	$ 1,149,668
Cost of net revenues	127,986	168,408	284,593	315,283
Gross profit	224,328	432,289	618,684	834,385
Operating expenses:
Selling, general and administrative	256,967	267,948	539,873	515,058
Research and development	40,361	38,851	81,893	76,354
Impairments and other charges	0	0	0	29,782
Litigation settlement gain	0	(51,000)	0	(51,000)
Total operating expenses	297,328	255,799	621,766	570,194
Income (loss) from operations	(73,000)	176,490	(3,082)	264,191
Interest income	473	3,465	2,459	6,098
Other income (expense), net	(966)	13,892	(19,515)	8,146
Total interest income and other income (expense), net	(493)	17,357	(17,056)	14,244
Net income (loss) before provision for (benefit from) income taxes and equity in losses of investee	(73,493)	193,847	(20,138)	278,435
Provision for (benefit from) income taxes	(32,891)	43,121	(1,497,667)	51,917
Equity in losses of investee, net of tax	0	3,584	0	7,528
Net income (loss)	$ (40,602)	$ 147,142	$ 1,477,529	$ 218,990
Net income (loss) per share:
Basic (in usd per share)	$ (0.52)	$ 1.84	$ 18.78	$ 2.74
Diluted (in usd per share)	$ (0.52)	$ 1.83	$ 18.70	$ 2.71
Shares used in computing net income (loss) per share:
Basic (in shares)	78,769	79,943	78,681	79,901
Diluted (in shares)	78,769	80,590	79,016	80,665