Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jul. 02, 2023	Jun. 30, 2024	Jul. 02, 2023
Income Statement [Abstract]
Revenue	$ 239,292	$ 242,512	$ 450,089	$ 443,636
Cost of revenue	72,693	62,829	141,553	120,213
Gross margin	166,599	179,683	308,536	323,423
Research, development, and engineering expenses	34,962	33,585	72,067	72,127
Selling, general, and administrative expenses	93,180	83,423	183,808	166,460
Loss (recovery) from fire (Note 17)	0	(2,500)	0	(2,500)
Operating income	38,457	65,175	52,661	87,336
Foreign currency gain (loss)	(181)	(1,605)	(135)	(1,211)
Investment income	3,116	4,095	6,236	7,682
Other income (expense)	176	112	372	185
Income before income tax expense	41,568	67,777	59,134	93,992
Income tax expense	5,356	10,303	10,900	10,903
Net income	$ 36,212	$ 57,474	$ 48,234	$ 83,089
Net income per weighted-average common and common-equivalent share:
Basic (usd per share)	$ 0.21	$ 0.33	$ 0.28	$ 0.48
Diluted (usd per share)	$ 0.21	$ 0.33	$ 0.28	$ 0.48
Weighted-average common and common-equivalent shares outstanding:
Basic (shares)	171,568	172,429	171,630	172,527
Diluted (shares)	172,733	173,622	172,699	173,791
Cash dividends per common share (usd per share)	$ 0.075	$ 0.070	$ 0.150	$ 0.140