Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Revenues:
Net product sales	$ 135,800	$ 127,035
Costs and Expenses:
Cost of sales (excluding amortization of product rights)	32,079	18,869
Research and development	15,399	10,426
Selling, general and administrative	37,949	28,310
Intangible amortization	8,827	8,897
Other operating expenses	1,236	498
Total costs and expenses	95,490	67,000
Operating income	40,310	60,035
Other Income (Expense):
Interest income	136	204
Interest expense	(3,447)	(2,981)
Other income, net	1,061	3,142
Income before income tax expense	38,060	60,400
Income tax expense	18,069	23,954
Net income	$ 19,991	$ 36,446
Net income per share:
Basic	$ 0.28	$ 0.47
Diluted	$ 0.26	$ 0.40
Shares used in computing net income per share:
Basic	70,512	77,849
Diluted	85,026	95,973