CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 29, 2025	Jun. 30, 2024	Jun. 29, 2025	Jun. 30, 2024
Revenues:
Total revenues	$ 651,797	$ 729,879	$ 1,337,477	$ 1,329,698
Cost of revenues:
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below)	278,785	304,035	549,128	564,572
Gross profit	373,012	425,844	788,349	765,126
Operating expenses:
Selling and administrative	157,782	154,470	315,039	303,658
Engineering and development	118,382	111,816	236,570	215,015
Acquired intangible assets amortization	3,733	4,664	8,306	9,361
Restructuring and other	2,372	2,012	16,887	6,440
Gain on sale of business	0	(57,486)	0	(57,486)
Total operating expenses	282,269	215,476	576,802	476,988
Income from operations	90,743	210,368	211,547	288,138
Non-operating (income) expense:
Interest income	(4,351)	(6,715)	(9,427)	(14,582)
Interest expense	805	1,530	1,600	2,190
Other (income) expense, net	(2,270)	(3,850)	3,790	8,225
Income before income taxes and equity in net earnings of affiliate	96,559	219,403	215,584	292,305
Income tax provision	12,260	33,130	26,804	41,835
Income before equity in net earnings of affiliate	84,299	186,273	188,780	250,470
Equity in net earnings of affiliate	(5,927)	0	(11,511)	0
Net income	$ 78,372	$ 186,273	$ 177,269	$ 250,470
Net income per common share:
Basic	$ 0.49	$ 1.18	$ 1.1	$ 1.61
Diluted	$ 0.49	$ 1.14	$ 1.1	$ 1.54
Weighted average common shares—basic	159,967	157,804	160,734	155,426
Weighted average common shares—diluted	160,135	163,470	161,065	162,909
Product [Member]
Revenues:
Total revenues	$ 522,657	$ 596,877	$ 1,084,614	$ 1,055,310
Cost of revenues:
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below)	232,422	250,236	456,564	450,999
Service [Member]
Revenues:
Total revenues	129,140	133,002	252,863	274,388
Cost of revenues:
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below)	$ 46,363	$ 53,799	$ 92,564	$ 113,573