Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues:
Net product revenues	$ 375,540	$ 235,441	$ 778,519	$ 438,042
Costs and expenses:
Cost of products sold (excluding amortization of product rights and intangibles of $53,910 and $11,162 for the three-month periods ended June 30, 2014 and 2013, and $107,807 and $22,329 for the six-month periods ended June 30, 2014 and 2013, respectively)	104,567	46,489	221,507	79,561
Amortization of product rights and intangible assets	53,910	11,162	107,807	22,329
Change in acquisition-related contingent consideration	10,149	2,100	14,188	4,600
Research and development (as revised)	25,576	35,106	66,798	56,711
Selling, general and administrative (as revised)	138,362	90,442	345,460	175,425
Total cost and expenses	332,564	185,299	755,760	338,626
Income from operations	42,976	50,142	22,759	99,416
Interest expense	(42,442)	(15,459)	(85,152)	(30,788)
Interest and other (expense) income	(23)	622	286	636
Income (loss) before provision for income tax	511	35,305	(62,107)	69,264
Income tax (expense) benefit	(93)	(14,305)	27,948	(25,823)
Net income (loss)	418	21,000	(34,159)	43,441
Net (loss) income per share, basic	$ 0.01	$ 0.34	$ (0.54)	$ 0.71
Net (loss) income per share, diluted	$ 0.01	$ 0.32	$ (0.54)	$ 0.68
Shares used in computing net income (loss) per share, basic	63,437	61,322	63,379	61,234
Shares used in computing net income (loss) per share, diluted	75,453	64,909	63,379	64,253
Comprehensive income (loss)	$ 221	$ 21,411	$ (34,367)	$ 42,916