CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Oct. 01, 2011	Oct. 02, 2010	Oct. 01, 2011	Oct. 02, 2010
Revenues	$ 215,988	$ 236,998	$ 669,096	$ 625,314
Cost of goods sold	140,632	139,039	414,204	373,373
Gross profit	75,356	97,959	254,892	251,941
Operating expenses:
Research, development and engineering	36,479	32,978	110,910	96,397
Selling, general and administrative	22,799	23,308	73,415	71,594
Litigation expense	4,058	2,807	16,968	5,133
Total operating expenses	63,336	59,093	201,293	173,124
Income from operations	12,020	38,866	53,599	78,817
Other income (expense), net:
Interest income	40	85	249	308
Interest expense	(367)	(189)	(1,107)	(559)
Foreign currency gain (loss)	(309)	(202)	(278)	(411)
Recovery of investment	360	0	867	0
Other, net	7	248	101	316
Total other income (expense), net	(269)	(58)	(168)	(346)
Income before income tax	11,751	38,808	53,431	78,471
Income tax expense	(3,087)	(73,367)	9,589	(69,872)
Net income	$ 14,838	$ 112,175	$ 43,842	$ 148,343
Net income per common share:
Basic	$ 0.09	$ 0.72	$ 0.27	$ 0.96
Diluted	$ 0.09	$ 0.69	$ 0.25	$ 0.92
Common equivalent shares:
Basic	164,812	155,734	163,773	154,737
Diluted	171,027	162,653	173,082	161,146