Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2023	Oct. 02, 2022	Oct. 01, 2023	Oct. 02, 2022
Income Statement [Abstract]
Revenue	$ 197,241	$ 209,622	$ 640,877	$ 766,657
Cost of revenue	54,467	57,383	174,680	214,316
Gross margin	142,774	152,239	466,197	552,341
Research, development, and engineering expenses	32,580	33,954	104,707	103,999
Selling, general, and administrative expenses	82,307	75,371	248,767	236,156
Loss (recovery) from fire (Note 17)	(2,750)	2,891	(5,250)	20,294
Operating income	30,637	40,023	117,973	191,892
Foreign currency gain (loss)	(8,699)	(1,880)	(9,910)	(4,367)
Investment income	4,891	1,416	12,573	4,389
Other income (expense)	173	(214)	358	(450)
Income before income tax expense	27,002	39,345	120,994	191,464
Income tax expense	8,086	5,365	18,989	31,250
Net income	$ 18,916	$ 33,980	$ 102,005	$ 160,214
Net income per weighted-average common and common-equivalent share:
Basic (usd per share)	$ 0.11	$ 0.20	$ 0.59	$ 0.92
Diluted (usd per share)	$ 0.11	$ 0.19	$ 0.59	$ 0.91
Weighted-average common and common-equivalent shares outstanding:
Basic (shares)	172,169	173,256	172,408	173,640
Diluted (shares)	173,354	174,327	173,659	175,233
Cash dividends per common share (usd per share)	$ 0.070	$ 0.065	$ 0.210	$ 0.195