CONSOLIDATED STATEMENTS OF EARNINGS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Net sales:
Net sales of tangible products	$ 249,919	$ 239,786	$ 714,949	$ 706,970
Revenue from services and software	13,604	12,251	38,671	36,019
Total net sales	263,523	252,037	753,620	742,989
Cost of sales:
Cost of sales of tangible products	128,191	118,751	370,966	357,764
Cost of services and software	6,722	6,362	20,072	18,041
Total cost of sales	134,913	125,113	391,038	375,805
Gross profit	128,610	126,924	362,582	367,184
Operating expenses:
Selling and marketing	34,395	32,321	101,740	96,593
Research and development	22,376	22,007	67,435	64,759
General and administrative	22,452	22,481	71,781	71,203
Amortization of intangible assets	1,831	1,670	5,557	3,210
Acquisition costs	268	566	1,368	2,072
Exit and restructuring costs	519	0	3,515	0
Asset impairment charge	0	9,114	0	9,114
Total operating expenses	81,841	88,159	251,396	246,951
Operating income	46,769	38,765	111,186	120,233
Other income (expense):
Investment income	550	541	1,700	1,959
Foreign exchange loss	(173)	(514)	(733)	(936)
Other, net	(5)	(294)	1,468	(1,144)
Total other income (expense)	372	(267)	2,435	(121)
Income from continuing operations before income taxes	47,141	38,498	113,621	120,112
Income taxes	8,541	11,917	20,921	33,014
Income from continuing operations	38,600	26,581	92,700	87,098
Income from discontinued operations, net of tax	0	516	8	816
Net income	$ 38,600	$ 27,097	$ 92,708	$ 87,914
Basic earnings per share:
Income from continuing operations	$ 0.76	$ 0.52	$ 1.82	$ 1.68
Income from discontinued operations	$ 0.00	$ 0.01	$ 0.00	$ 0.02
Net income	$ 0.76	$ 0.53	$ 1.82	$ 1.70
Diluted earnings per share:
Income from continuing operations	$ 0.76	$ 0.51	$ 1.81	$ 1.67
Income from discontinued operations	$ 0.00	$ 0.01	$ 0.00	$ 0.02
Net income	$ 0.76	$ 0.52	$ 1.81	$ 1.69
Basic weighted average shares outstanding	50,590	51,566	50,808	51,775
Diluted weighted average and equivalent shares outstanding	50,924	51,809	51,171	52,041