Condensed Consolidated Income Statements (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Sales Revenue, Goods, Net	$ 374,025	$ 364,243	$ 720,644	$ 721,436
Sales Revenue, Services, Net	169,272	157,547	328,031	311,244
Revenue	543,297	521,790	1,048,675	1,032,680
Cost of Goods Sold	195,756	186,442	376,886	372,899
Cost of Services	105,242	96,554	204,605	188,973
Cost of sales	300,998	282,996	581,491	561,872
Selling, general and administrative expenses	148,755	149,735	300,252	306,584
Research and development expenses	34,603	34,069	68,780	66,693
Restructuring and lease charges, net	19,277	5,203	22,587	11,362
Operating income from continuing operations	39,664	49,787	75,565	86,169
Interest and other expense, net	12,865	11,358	24,905	24,188
Income from continuing operations before income taxes	26,799	38,429	50,660	61,981
Provision for income taxes	(137)	4,861	(8,565)	6,337
Net income from continuing operations	26,936	33,568	59,225	55,644
Gain (Loss) on disposition of discontinued operations before income taxes	613	482	521	1,017
(Benefit from) provision for income taxes on discontinued operations and dispositions	(376)	417	(395)	459
Net income (loss) from discontinued operations and dispositions	989	65	916	558
Net income	$ 27,925	$ 33,633	$ 60,141	$ 56,202
Basic earnings (loss) per share:
Net income from continuing operations (per share)	$ 0.24	$ 0.30	$ 0.53	$ 0.49
Net income (loss) from discontinued operations and dispositions (per share)	$ 0.01	$ 0.00	$ 0.01	$ 0.00
Net Income (per share)	$ 0.25	$ 0.30	$ 0.53	$ 0.50
Diluted earnings (loss) per share:
Net income from continuing operations (per share)	$ 0.24	$ 0.29	$ 0.52	$ 0.49
Net income (loss) from discontinued operations and dispositions (per share)	$ 0.01	$ 0.00	$ 0.01	$ 0.00
Net income (per share)	$ 0.25	$ 0.29	$ 0.53	$ 0.49
Weighted average shares of common stock outstanding:
Basic (in shares)	111,575	113,515	112,515	113,306
Diluted (in shares)	112,718	114,578	113,717	114,348
Cash dividends per common share	$ 0.07	$ 0.07	$ 0.14	$ 0.14