Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2021	Sep. 27, 2020	Oct. 03, 2021	Sep. 27, 2020
Income Statement [Abstract]
Revenue	$ 284,848	$ 251,073	$ 793,033	$ 587,405
Cost of revenue	85,712	59,741	208,189	151,261
Gross margin	199,136	191,332	584,844	436,144
Research, development, and engineering expenses	34,476	30,240	99,883	96,583
Selling, general, and administrative expenses	77,113	64,206	226,380	193,497
Restructuring charges (Note 16)	0	251	0	15,049
Intangible asset impairment charges (Note 8)	0	0	0	19,571
Operating income	87,547	96,635	258,581	111,444
Foreign currency gain (loss)	(586)	2,357	(2,233)	(310)
Investment income	1,748	2,490	5,025	11,010
Other income (expense)	(125)	(173)	(420)	(153)
Income before income tax expense	88,584	101,309	260,953	121,991
Income tax expense	9,684	13,803	34,607	15,150
Net Income	$ 78,900	$ 87,506	$ 226,346	$ 106,841
Net income per weighted-average common and common-equivalent share:
Basic (usd per share)	$ 0.45	$ 0.50	$ 1.28	$ 0.62
Diluted (usd per share)	$ 0.44	$ 0.49	$ 1.26	$ 0.61
Weighted-average common and common-equivalent shares outstanding:
Basic (shares)	176,812	173,943	176,572	172,881
Diluted (shares)	180,342	177,138	180,109	176,038
Cash dividends per common share (usd per share)	$ 0.060	$ 0.055	$ 0.180	$ 0.165