Consolidated Statements of Income (unaudited) (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
Net sales	$ 173,987	$ 163,465	$ 517,762	$ 465,375
Cost of sales	105,516	96,212	314,594	285,459
Gross profit	68,471	67,253	203,168	179,916
Selling, general and administrative expenses	32,015	27,553	87,851	80,208
Research and development expenses	5,297	4,345	14,754	12,698
Amortization of intangibles	1,585	1,247	4,780	3,752
[OperatingExpenses]	38,897	33,145	107,385	96,658
Operating income	29,574	34,108	95,783	83,258
Interest expense	414	313	1,271	1,096
Other (income) expense, net	(1,897)	(29)	(1,934)	(1,328)
Income before income taxes	31,057	33,824	96,446	83,490
Income taxes	6,118	10,486	24,660	24,405
Net income	$ 24,939	$ 23,338	$ 71,786	$ 59,085
Net income per share (see note 9):
Basic (in Dollars per share)	$ 1.13	$ 1.06	$ 3.25	$ 2.68
Diluted (in Dollars per share)	$ 1.12	$ 1.04	$ 3.19	$ 2.64
Weighted average shares and equivalent shares outstanding:
Basic (in Shares)	22,000	21,968	22,023	21,945
Diluted (in Shares)	22,287	22,344	22,407	22,316