Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 28, 2014		Sep. 29, 2013		Sep. 28, 2014		Sep. 29, 2013
Net revenues:
Products	$ 402,987		$ 365,825		$ 1,110,861		$ 943,212
Services	75,023		67,551		213,726		199,420
Total net revenues	478,010		433,376		1,324,587		1,142,632
Cost of revenues:
Cost of products	182,591		150,365		509,450		405,569
Cost of services	34,298		28,717		96,556		88,119
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below)	216,889		179,082		606,006		493,688
Gross profit	261,121		254,294		718,581		648,944
Operating expenses:
Engineering and development	71,953		68,918		212,452		199,442
Selling and administrative	73,064		72,917		228,556		210,037
Acquired intangible assets amortization	18,271		18,064		54,813		54,163
Restructuring and other	(405)		889		167		1,480
Total operating expenses	162,883		160,788		495,988		465,122
Income from operations	98,238		93,506		222,593		183,822
Interest income	1,922		948		4,224		2,923
Interest expense and other (income) expense	(510)		6,902		6,628		20,262
Income before income taxes	100,670	[1],[2]	87,552	[1],[2]	220,189	[1],[2]	166,483	[1],[2]
Income tax provision	17,721		18,093		35,106		23,879
Net income	$ 82,949		$ 69,459		$ 185,083		$ 142,604
Net income per common share:
Basic	$ 0.40		$ 0.36		$ 0.93		$ 0.75
Diluted	$ 0.38		$ 0.29		$ 0.83		$ 0.61
Weighted average common shares-basic	207,381		191,307		198,367		190,521
Weighted average common shares-diluted	218,333		235,828		223,795		235,165
Cash dividend declared per common share	$ 0.06				$ 0.12

[1] Pension and postretirement actuarial gains and losses, interest income, and interest expense and other are included in Corporate and Eliminations.

[2] Included in the income (loss) before income taxes for each of the segments are charges and credits for the three and nine months ended September 28, 2014 and September 29, 2013 that include restructuring and other, and provision for excess and obsolete inventory, as follows: