Consolidated Statements Of Earnings (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Apr. 02, 2011
Net sales:
Net sales of tangible products	$ 232,476	$ 226,120
Revenue from services and software	11,399	11,181
Total net sales	243,875	237,301
Cost of sales:
Cost of sales of tangible products	119,053	110,781
Cost of services and software	4,959	6,522
Total cost of sales	124,012	117,303
Gross profit	119,863	119,998
Operating expenses:
Selling and marketing	32,114	28,528
Research and development	20,419	21,681
General and administrative	24,551	22,706
Amortization of intangible assets	770	835
Exit and restructuring costs	0	1,886
Total operating expenses	77,854	75,636
Operating income	42,009	44,362
Other income (expense):
Investment income	592	560
Foreign exchange loss	(342)	(294)
Other, net	(364)	(254)
Total other income (expense)	(114)	12
Income from continuing operations before income taxes	41,895	44,374
Income taxes	11,731	14,246
Income from continuing operations	30,164	30,128
Income from discontinued operations, net of tax	0	31,506
Net income	$ 30,164	$ 61,634
Basic earnings per share:
Income from continuing operations	$ 0.58	$ 0.54
Income from discontinued operations	$ 0.00	$ 0.57
Net income	$ 0.58	$ 1.11
Diluted earnings per share:
Income from continuing operations	$ 0.58	$ 0.54
Income from discontinued operations	$ 0.00	$ 0.56
Net income	$ 0.58	$ 1.10
Basic weighted average shares outstanding	51,998	55,353
Diluted weighted average and equivalent shares outstanding	52,301	55,774