Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Condensed Consolidated Statements of Operations
Revenues	$ 96,800	$ 109,507	$ 204,559	$ 225,498
Cost of sales:
Cost of goods sold	36,410	36,586	81,334	75,190
Amortization of intangible assets	8,190	3,967	14,942	5,500
Total cost of sales	44,600	40,553	96,276	80,690
Gross profit	52,200	68,954	108,283	144,808
Operating expenses:
Research and development	23,420	21,763	49,193	44,572
Sales and marketing	17,997	18,229	38,722	35,666
General and administrative	11,454	12,807	24,233	25,957
Amortization of intangible assets	1,786	1,021	3,550	1,251
Restructuring and other	1,977	0	23,341	0
Acquisition-related expenses	0	2,484	0	2,484
Total operating expenses	56,634	56,304	139,039	109,930
Income (loss) from operations	(4,434)	12,650	(30,756)	34,878
Other income (expense), net:	(874)	(914)	(1,648)	(1,859)
Income (loss) from operations before provision for (benefit from) income taxes	(5,308)	11,736	(32,404)	33,019
Provision for (benefit from) income taxes	1,156	2,314	(9,944)	9,879
Net income (loss)	$ (6,464)	$ 9,422	$ (22,460)	$ 23,140
Earnings (loss) per share:
Basic	$ (0.09)	$ 0.14	$ (0.33)	$ 0.34
Diluted	$ (0.09)	$ 0.14	$ (0.33)	$ 0.34
Weighted average number of shares outstanding:
Basic	69,054	68,374	68,912	68,005
Diluted	69,054	68,946	68,912	68,856