Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Revenues:
Net product sales	$ 142,956	$ 117,781	$ 398,792	$ 317,389
Costs and Expenses:
Cost of sales (excluding amortization of product rights)	20,115	15,755	60,293	43,354
Research and development	22,927	10,188	53,770	29,153
Selling, general and administrative	31,353	24,991	91,729	71,333
Intangible amortization	7,208	7,079	23,261	22,273
Other operating expenses	10,863	532	16,889	532
Total costs and expenses	92,466	58,545	245,942	166,645
Operating income	50,490	59,236	152,850	150,744
Other Income (Expense):
Interest income	121	113	515	232
Interest expense	(3,142)	(2,915)	(9,165)	(8,656)
Other (expense) income, net	(2,949)	5,138	410	1,336
Income before income tax expense	44,520	61,572	144,610	143,656
Income tax expense	16,281	23,233	57,129	55,515
Net income	$ 28,239	$ 38,339	$ 87,481	$ 88,141
Net income per share:
Basic	$ 0.38	$ 0.49	$ 1.15	$ 1.13
Diluted	$ 0.35	$ 0.45	$ 1.04	$ 1.04
Shares used in computing net income per share:
Basic	73,808	77,895	75,871	77,744
Diluted	87,278	90,081	89,242	89,911