Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Condensed Consolidated Statements Of Operations
Net product sales	$ 185,699	$ 125,834	$ 351,825	$ 243,412
Cost of sales	21,745	13,721	40,973	27,720
Operating expenses:
Research and development	35,646	23,690	66,456	46,064
Selling, general and administrative	78,180	56,098	144,037	106,733
Acquisition-related costs	1,000		10,928
Amortization of purchased intangible assets	104		174
Total operating expenses	114,930	79,788	221,595	152,797
Operating income	49,024	32,325	89,257	62,895
Other income and expense:
Investment income	772	336	1,168	586
Interest expense	(203)	(158)	(401)	(368)
Foreign currency loss	(506)	(420)	(111)	(957)
Income before income taxes	49,087	32,083	89,913	62,156
Income tax provision	14,342	10,310	28,338	19,449
Net income	$ 34,745	$ 21,773	$ 61,575	$ 42,707
Earnings per common share
Basic	$ 0.19	$ 0.12	$ 0.34	$ 0.24
Diluted	$ 0.18	$ 0.12	$ 0.32	$ 0.23
Shares used in computing earnings per common share
Basic	182,962	178,004	182,347	177,510
Diluted	191,187	185,150	190,790	184,680