Condensed Consolidated Income Statements (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Sales Revenue, Goods, Net	$ 365,485	$ 346,619
Sales Revenue, Services, Net	166,419	158,759
Revenue	531,904	505,378
Cost of Goods Sold	189,021	181,130
Cost of Services	107,363	99,363
Cost of sales	296,384	280,493
Selling, general and administrative expenses	153,204	151,497
Research and development expenses	29,449	34,177
Restructuring and lease charges, net	2,135	3,310
Operating income from continuing operations	50,732	35,901
Interest and other expense, net	11,289	12,040
Income from continuing operations before income taxes	39,443	23,861
Provision for income taxes	5,124	(8,428)
Net income from continuing operations	34,319	32,289
Gain (Loss) on disposition of discontinued operations before income taxes	(72)	(92)
(Benefit from) provision for income taxes on discontinued operations and dispositions	23	(19)
Net income (loss) from discontinued operations and dispositions	(95)	(73)
Net income	$ 34,224	$ 32,216
Basic earnings (loss) per share:
Net income from continuing operations (per share)	$ 0.30	$ 0.28
Net income (loss) from discontinued operations and dispositions (per share)	$ 0.00	$ 0.00
Net Income (per share)	$ 0.30	$ 0.28
Diluted earnings (loss) per share:
Net income from continuing operations (per share)	$ 0.30	$ 0.28
Net income (loss) from discontinued operations and dispositions (per share)	$ 0.00	$ 0.00
Net income (per share)	$ 0.30	$ 0.28
Weighted average shares of common stock outstanding:
Basic (in shares)	112,553	113,454
Diluted (in shares)	113,777	114,716
Cash dividends per common share	$ 0.07	$ 0.07