CONSOLIDATED STATEMENTS OF EARNINGS (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011
Net sales
Net sales of tangible products	$ 239,786	$ 241,686	$ 706,970	$ 700,568
Revenue from services and software	12,251	11,652	36,019	35,612
Total net sales	252,037	253,338	742,989	736,180
Cost of sales
Cost of sales of tangible products	118,751	122,529	357,764	351,042
Cost of services and software	6,362	7,256	18,041	19,889
Total cost of sales	125,113	129,785	375,805	370,931
Gross profit	126,924	123,553	367,184	365,249
Operating expenses:
Selling and marketing	32,321	31,942	96,593	91,420
Research and development	22,007	22,584	64,759	66,752
General and administrative	22,481	18,978	71,203	62,372
Amortization of intangible assets	1,670	843	3,210	2,514
Acquisition costs	566	188	2,072	188
Exit and restructuring costs	0	138	0	2,090
Asset impairment charge	9,114	0	9,114	0
Total operating expenses	88,159	74,673	246,951	225,336
Operating income	38,765	48,880	120,233	139,913
Other income (expense):
Investment income	541	134	1,959	1,350
Foreign exchange loss	(514)	(173)	(936)	(1,300)
Other, net	(294)	(859)	(1,144)	(1,356)
Total other income (expense)	(267)	(898)	(121)	(1,306)
Income from continuing operations before income taxes	38,498	47,982	120,112	138,607
Income taxes	11,917	13,795	33,014	41,123
Income from continuing operations	26,581	34,187	87,098	97,484
Income from discontinued operations, net of tax	516	10,814	816	42,115
Net income	$ 27,097	$ 45,001	$ 87,914	$ 139,599
Basic earnings per share:
Income from continuing operations	$ 0.52	$ 0.64	$ 1.68	$ 1.79
Income from discontinued operations	$ 0.01	$ 0.20	$ 0.02	$ 0.77
Net income	$ 0.53	$ 0.84	$ 1.70	$ 2.56
Diluted earnings per share:
Income from continuing operations	$ 0.51	$ 0.64	$ 1.67	$ 1.78
Income from discontinued operations	$ 0.01	$ 0.20	$ 0.02	$ 0.77
Net income	$ 0.52	$ 0.84	$ 1.69	$ 2.55
Basic weighted average shares outstanding	51,566	53,339	51,775	54,405
Diluted weighted average and equivalent shares outstanding	51,809	53,628	52,041	54,770