Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Revenues:
Net product sales	$ 544,374	$ 439,012	$ 310,449
Costs and Expenses:
Cost of sales (excluding amortization of product rights)	79,976	61,288	40,214
Research and development	66,477	39,613	52,083
Selling, general and administrative	127,775	95,664	89,316
Intangible amortization	31,035	29,357	28,183
Goodwill impairment			65,099
Impairment loss	8,495		3,424
Other operating expenses	8,488	1,390
Total costs and expenses	322,246	227,312	278,319
Operating income	222,128	211,700	32,130
Other Income (Expense):
Interest income	655	372	352
Interest expense	(12,640)	(11,616)	(11,609)
Other (expense) income, net	(2,136)	430
Gain on long-term debt repurchase			9,079
Income before income tax expense	208,007	200,886	29,952
Income tax expense	67,348	75,278	41,029
Net income (loss)	$ 140,659	$ 125,608	$ (11,077)
Net income (loss) per share:
Basic	$ 1.89	$ 1.61	$ (0.14)
Diluted	$ 1.68	$ 1.47	$ (0.14)
Shares used in computing net income (loss) per share:
Basic	74,517	77,820	77,423
Diluted	88,076	90,081	77,423