Condensed Consolidated Income Statements (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 01, 2012	Jul. 03, 2011	Jul. 01, 2012	Jul. 03, 2011
Sales Revenue, Goods, Net	$ 364,243	$ 326,419	$ 721,436	$ 632,545
Sales Revenue, Services, Net	157,547	152,646	311,244	293,698
Revenue	521,790	479,065	1,032,680	926,243
Cost of Goods Sold	186,442	176,080	372,899	333,331
Cost of Services	96,554	93,791	188,973	183,407
Cost of sales	282,996	269,871	561,872	516,738
Selling, general and administrative expenses	149,735	138,403	306,584	271,098
Research and development expenses	34,069	28,032	66,693	54,217
Restructuring and lease charges, net	5,203	3,340	11,362	3,340
Operating income from continuing operations	49,787	39,419	86,169	80,850
Interest and other expense, net	11,358	4,271	24,188	10,027
Income from continuing operations before income taxes	38,429	35,148	61,981	70,823
Provision for income taxes	4,861	6,047	6,337	14,431
Net income from continuing operations	33,568	29,101	55,644	56,392
Gain (Loss) on disposition of discontinued operations before income taxes	482	(157)	1,017	(1,741)
(Benefit from) provision for income taxes on discontinued operations and dispositions	417	(817)	459	(23)
Net income (loss) from discontinued operations and dispositions	65	660	558	(1,718)
Net income	$ 33,633	$ 29,761	$ 56,202	$ 54,674
Basic earnings (loss) per share:
Net income from continuing operations (per share)	$ 0.30	$ 0.26	$ 0.49	$ 0.50
Net income (loss) from discontinued operations and dispositions (per share)	$ 0.00	$ 0.01	$ 0.00	$ (0.02)
Net Income (per share)	$ 0.30	$ 0.26	$ 0.50	$ 0.48
Diluted earnings (loss) per share:
Net income from continuing operations (per share)	$ 0.29	$ 0.26	$ 0.49	$ 0.49
Net income (loss) from discontinued operations and dispositions (per share)	$ 0.00	$ 0.01	$ 0.00	$ (0.02)
Net income (per share)	$ 0.29	$ 0.26	$ 0.49	$ 0.48
Weighted average shares of common stock outstanding:
Basic (in shares)	113,515	112,494	113,306	113,246
Diluted (in shares)	114,578	113,623	114,348	114,381
Cash dividends per common share	$ 0.07	$ 0.07	$ 0.14	$ 0.14