Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenues:
Net product sales	$ 107,149	$ 135,800
Costs and Expenses:
Cost of sales (excluding amortization of product rights)	29,859	32,079
Research and development	17,197	15,399
Selling, general and administrative	42,724	37,949
Intangible amortization	8,899	8,827
Impairment loss	104,245
Other operating expenses	2,084	1,236
Total costs and expenses	205,008	95,490
Operating income (loss)	(97,859)	40,310
Other Income (Expense):
Interest income	165	136
Interest expense	(3,609)	(3,447)
Other (expense) income, net	(4,152)	1,061
Income (loss) before income tax expense (benefit)	(105,455)	38,060
Income tax expense (benefit)	(41,458)	18,069
Net income (loss)	$ (63,997)	$ 19,991
Net income (loss) per share:
Basic (in dollars per share)	$ (0.98)	$ 0.28
Diluted (in dollars per share)	$ (0.98)	$ 0.26
Shares used in computing net income (loss) per share:
Basic (in shares)	65,207	70,512
Diluted (in shares)	65,207	85,026