CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2022	Oct. 02, 2021	Oct. 01, 2022	Oct. 02, 2021
Revenues:
Total net sales	$ 708,555	$ 659,233	$ 2,113,446	$ 1,949,425
Costs and operating expenses:
Selling and administrative expenses	164,417	152,545	483,769	453,954
Research and development expenses	43,435	41,986	127,913	125,027
Purchased intangibles amortization	1,592	1,759	4,863	5,408
Acquired in-process research and development			9,797	0
Total costs and operating expenses	516,545	467,418	1,526,334	1,389,918
Operating income	192,010	191,815	587,112	559,507
Other income (expense), net	895	(607)	2,600	18,073
Interest expense	(12,420)	(11,081)	(34,898)	(34,054)
Interest income	2,896	2,548	7,536	10,347
Income before income taxes	183,381	182,675	562,350	553,873
Provision for income taxes	27,383	21,490	81,657	77,269
Net income	$ 155,998	$ 161,185	$ 480,693	$ 476,604
Net income per basic common share	$ 2.61	$ 2.63	$ 7.98	$ 7.72
Weighted-average number of basic common shares	59,801	61,359	60,200	61,771
Net income per diluted common share	$ 2.6	$ 2.6	$ 7.94	$ 7.66
Weighted-average number of diluted common shares and equivalents	60,081	61,888	60,521	62,244
Product [Member]
Revenues:
Total net sales	$ 464,923	$ 419,133	$ 1,385,393	$ 1,242,110
Costs and operating expenses:
Costs and operating expenses	199,918	171,364	593,884	506,985
Service [Member]
Revenues:
Total net sales	243,632	240,100	728,053	707,315
Costs and operating expenses:
Costs and operating expenses	$ 107,183	$ 99,764	$ 306,108	$ 298,544