CONSOLIDATED STATEMENTS OF EARNINGS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011
Net sales
Net sales of tangible products	$ 234,708	$ 232,762	$ 467,184	$ 458,882
Revenue from services and software	12,369	12,779	23,768	23,960
Total net sales	247,077	245,541	490,952	482,842
Cost of sales
Cost of sales of tangible products	119,980	117,732	239,013	228,513
Cost of services and software	6,720	6,111	11,679	12,633
Total cost of sales	126,700	123,843	250,692	241,146
Gross profit	120,377	121,698	240,260	241,696
Operating expenses:
Selling and marketing	32,158	30,950	64,272	59,478
Research and development	22,336	22,487	42,752	44,168
General and administrative	24,402	20,688	48,722	43,394
Amortization of intangible assets	770	836	1,540	1,671
Acquisition costs	1,252	0	1,506	0
Exit and restructuring costs	0	66	0	1,952
Total operating expenses	80,918	75,027	158,792	150,663
Operating income	39,459	46,671	81,468	91,033
Other income (expense):
Investment income	826	656	1,418	1,216
Foreign exchange loss	(80)	(833)	(422)	(1,127)
Other, net	(486)	(243)	(850)	(497)
Total other income (expense)	260	(420)	146	(408)
Income from continuing operations before income taxes	39,719	46,251	81,614	90,625
Income taxes	9,366	13,082	21,097	27,328
Income from continuing operations	30,353	33,169	60,517	63,297
Income (loss) from discontinued operations, net of tax	300	(205)	300	31,301
Net income	$ 30,653	$ 32,964	$ 60,817	$ 94,598
Basic earnings per share:
Income from continuing operations	$ 0.58	$ 0.60	$ 1.16	$ 1.15
Income (loss) from discontinued operations	$ 0.01	$ 0.00	$ 0.01	$ 0.57
Net income	$ 0.59	$ 0.60	$ 1.17	$ 1.72
Diluted earnings per share:
Income from continuing operations	$ 0.58	$ 0.60	$ 1.16	$ 1.14
Income (loss) from discontinued operations	$ 0.01	$ 0.00	$ 0.01	$ 0.57
Net income	$ 0.59	$ 0.60	$ 1.17	$ 1.71
Basic weighted average shares outstanding	51,771	54,546	51,881	54,981
Diluted weighted average and equivalent shares outstanding	52,030	54,958	52,156	55,395