Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2023	Jul. 03, 2022	Jul. 02, 2023	Jul. 03, 2022
Income Statement [Abstract]
Revenue	$ 242,512	$ 274,628	$ 443,636	$ 557,035
Cost of revenue	62,829	78,143	120,213	156,933
Gross margin	179,683	196,485	323,423	400,102
Research, development, and engineering expenses	33,585	33,991	72,127	70,045
Selling, general, and administrative expenses	83,423	79,950	166,460	160,785
Loss (recovery) from fire (Note 17)	(2,500)	17,403	(2,500)	17,403
Operating income	65,175	65,141	87,336	151,869
Foreign currency gain (loss)	(1,605)	(2,043)	(1,211)	(2,487)
Investment income	4,095	1,505	7,682	2,973
Other income (expense)	112	(188)	185	(236)
Income before income tax expense	67,777	64,415	93,992	152,119
Income tax expense	10,303	5,514	10,903	25,885
Net income	$ 57,474	$ 58,901	$ 83,089	$ 126,234
Net income per weighted-average common and common-equivalent share:
Basic (usd per share)	$ 0.33	$ 0.34	$ 0.48	$ 0.73
Diluted (usd per share)	$ 0.33	$ 0.34	$ 0.48	$ 0.72
Weighted-average common and common-equivalent shares outstanding:
Basic (shares)	172,429	173,507	172,527	173,830
Diluted (shares)	173,622	174,993	173,791	175,874
Cash dividends per common share (usd per share)	$ 0.070	$ 0.065	$ 0.140	$ 0.130