Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues:
Net product sales	$ 103,711	$ 94,639	$ 210,860	$ 230,439
Costs and Expenses:
Cost of sales (excluding amortization of product rights)	28,158	28,089	58,017	60,167
Research and development	17,165	16,621	34,361	32,020
Selling, general and administrative	46,235	40,883	88,958	79,046
Intangible amortization	7,683	8,787	16,582	17,614
Impairment loss			104,245
Other operating expenses	684	858	2,767	2,054
Total costs and expenses	99,925	95,238	304,930	190,901
Operating income (loss)	3,786	(599)	(94,070)	39,538
Other Income (Expense):
Interest income	153	142	319	278
Interest expense	(3,681)	(3,518)	(7,290)	(6,965)
Other expense, net	(493)	(4,783)	(4,648)	(3,548)
Income (loss) before income tax expense (benefit)	(235)	(8,758)	(105,689)	29,303
Income tax expense (benefit)	(833)	(2,928)	(42,291)	15,142
Net income (loss)	$ 598	$ (5,830)	$ (63,398)	$ 14,161
Net income (loss) per share:
Basic (in dollars per share)	$ 0.01	$ (0.08)	$ (0.97)	$ 0.20
Diluted (in dollars per share)	$ 0.01	$ (0.08)	$ (0.97)	$ 0.19
Shares used in computing net income (loss) per share:
Basic (in shares)	65,355	69,390	65,281	69,951
Diluted (in shares)	68,917	69,390	65,281	73,028