Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2022	Jul. 04, 2021	Jul. 03, 2022	Jul. 04, 2021
Income Statement [Abstract]
Revenue	$ 274,628	$ 269,158	$ 557,035	$ 508,185
Cost of revenue	78,143	68,432	156,933	122,477
Gross margin	196,485	200,726	400,102	385,708
Research, development, and engineering expenses	33,991	31,302	70,045	65,407
Selling, general, and administrative expenses	79,950	76,843	160,785	149,267
Loss from fire (Note 17)	17,403	0	17,403	0
Operating income	65,141	92,581	151,869	171,034
Foreign currency gain (loss)	(2,043)	(639)	(2,487)	(1,647)
Investment income	1,505	1,723	2,973	3,277
Other income (expense)	(188)	(127)	(236)	(295)
Income before income tax expense	64,415	93,538	152,119	172,369
Income tax expense	5,514	15,940	25,885	24,923
Net income	$ 58,901	$ 77,598	$ 126,234	$ 147,446
Net income per weighted-average common and common-equivalent share:
Basic (usd per share)	$ 0.34	$ 0.44	$ 0.73	$ 0.84
Diluted (usd per share)	$ 0.34	$ 0.43	$ 0.72	$ 0.82
Weighted-average common and common-equivalent shares outstanding:
Basic (shares)	173,507	176,626	173,830	176,454
Diluted (shares)	174,993	179,991	175,874	179,982
Cash dividends per common share (usd per share)	$ 0.065	$ 0.060	$ 0.130	$ 0.120