Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net revenues	$ 100,519	$ 78,171	$ 166,691	$ 151,778
Operating expenses*:
Cost of goods sold	27,216	17,804	42,305	34,408
Research and development	13,626	10,186	25,484	22,180
Selling, general and administrative	74,894	42,585	119,204	89,532
Amortization of purchased intangibles	10,895	0	10,895	0
Contingent consideration	2,258	0	2,258	0
Total operating expenses	128,889	70,575	200,146	146,120
Income (loss) from operations	(28,370)	7,596	(33,455)	5,658
Interest expense	(7,134)		(10,138)
Other income, net	234	128	163	318
Income (loss) before income taxes	(35,270)	7,724	(43,430)	5,976
Income tax benefit	92,358	0	92,358	0
Net income	57,088	7,724	48,928	5,976
Net income per common share:
Basic (in dollars per share)	$ 1.16	$ 0.16	$ 0.99	$ 0.12
Diluted (in dollars per share)	$ 1.15	$ 0.16	$ 0.99	$ 0.12
Shares used to compute net income per common share:
Basic (in shares)	49,280,151	48,575,418	49,263,832	48,624,626
Diluted (in shares)	49,583,377	49,172,212	49,564,918	49,295,336
*includes the following amounts of stock-based compensation expense:
Stock-based compensation expense			7,976	7,572
Cost of goods sold
*includes the following amounts of stock-based compensation expense:
Stock-based compensation expense	38	17	68	37
Research and development
*includes the following amounts of stock-based compensation expense:
Stock-based compensation expense	704	637	1,402	1,244
Selling, general and administrative
*includes the following amounts of stock-based compensation expense:
Stock-based compensation expense	$ 3,475	$ 3,240	$ 6,506	$ 6,291