Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Oct. 02, 2011	Oct. 03, 2010	Oct. 02, 2011	Oct. 03, 2010
Condensed Consolidated Statements Of Operations [Abstract]
Net revenue	$ 301,800	$ 236,017	$ 871,863	$ 643,521
Cost of revenue	205,490	160,310	597,390	425,428
Gross profit	96,310	75,707	274,473	218,093
Operating expenses:
Research and development	12,738	10,564	35,102	29,814
Sales and marketing	39,600	34,069	115,284	95,216
General and administrative	10,851	9,358	31,044	26,697
Restructuring and other charges		(8)	2,094	(76)
Litigation reserves, net	44		(234)	211
Total operating expenses	63,233	53,983	183,290	151,862
Income from operations	33,077	21,724	91,183	66,231
Interest income	115	132	350	302
Other income (expense), net	(267)	(326)	(938)	(388)
Income before income taxes	32,925	21,530	90,595	66,145
Provision for income taxes	6,178	8,435	22,062	28,858
Net income	$ 26,747	$ 13,095	$ 68,533	$ 37,287
Net income per share:
Basic	$ 0.71	$ 0.37	$ 1.85	$ 1.06
Diluted	$ 0.70	$ 0.36	$ 1.81	$ 1.04
Weighted average shares outstanding used to compute net income per share:
Basic	37,483	35,441	36,967	35,218
Diluted	38,080	36,009	37,812	35,891