Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues:
Net product sales	$ 113,062	$ 91,004	$ 323,922	$ 321,444
Costs and Expenses:
Cost of sales (excluding amortization of product rights)	27,479	21,552	85,496	81,719
Research and development	18,092	16,547	52,453	48,567
Selling, general and administrative	45,499	44,293	134,457	123,337
Intangible amortization	7,689	8,830	24,271	26,444
Impairment loss			104,245
Other operating expenses	3,605	3,955	6,372	6,010
Total costs and expenses	102,364	95,177	407,294	286,077
Operating income (loss)	10,698	(4,173)	(83,372)	35,367
Other Income (Expense):
Interest income	154	128	472	406
Interest expense	(3,698)	(3,529)	(10,989)	(10,494)
Other income (expense) net	3,530	(1,213)	(1,116)	(4,762)
Income (loss) before income tax expense (benefit)	10,684	(8,787)	(95,005)	20,517
Income tax expense (benefit)	6,498	(4,220)	(35,793)	10,878
Net income (loss)	$ 4,186	$ (4,567)	$ (59,212)	$ 9,639
Net income (loss) per share:
Basic (in dollars per share)	$ 0.06	$ (0.07)	$ (0.91)	$ 0.14
Diluted (in dollars per share)	$ 0.06	$ (0.07)	$ (0.91)	$ 0.13
Shares used in computing net income (loss) per share:
Basic (in shares)	65,628	67,606	65,398	69,164
Diluted (in shares)	71,748	67,606	65,398	72,190