CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2026	Mar. 30, 2025
Cash flows from operating activities:
Net income	$ 398,908	$ 98,896
Adjustments to reconcile net income from operations to net cash provided by operating activities:
Depreciation	30,240	25,523
Stock-based compensation	21,902	15,204
Equity in net earnings of affiliate	4,611	5,584
Losses (gains) on investments	3,317	3,372
Provision for excess and obsolete inventory	4,682	4,945
Amortization	2,415	4,779
Deferred taxes	(7,777)	(7,811)
Other	2,286	3,483
Changes in operating assets and liabilities, net of businesses acquired:
Accounts receivable	(322,017)	13,053
Inventories	20,827	(31,049)
Prepayments and other assets	4,049	13,650
Accounts payable and other liabilities	(15,025)	(9,950)
Deferred revenue and customer advances	51,964	10,200
Retirement plans contributions	(1,534)	(1,282)
Income taxes	66,276	13,040
Net cash provided by operating activities	265,124	161,637
Cash flows from investing activities:
Purchases of property, plant and equipment	(64,733)	(64,021)
Acquisition of businesses, net of cash acquired	0	(17,002)
Purchase of investment in a business	0	(3,011)
Purchases of marketable securities	(40,797)	(10,753)
Proceeds from maturities of marketable securities	10,910	27,381
Proceeds from sales of marketable securities	27,328	5,633
Net cash used for investing activities	(67,292)	(61,773)
Cash flows from financing activities:
Proceeds from borrowings on revolving credit facility	50,000	0
Repayments of borrowings on revolving credit facility	(250,000)	0
Dividend payments	(20,362)	(19,406)
Repurchase of common stock	(5,518)	(157,475)
Payments related to net settlement of employee stock compensation awards	(39,437)	(14,726)
Issuance of common stock under stock purchase and stock option plans	15,101	14,792
Net cash used for financing activities	(250,216)	(176,815)
Effects of exchange rate changes on cash and cash equivalents	577	(771)
Decrease in cash and cash equivalents	(51,807)	(77,722)
Cash and cash equivalents at beginning of period	293,751	553,354
Cash and cash equivalents at end of period	241,944	475,632
Non-cash investing activities:
Capital expenditures incurred but not yet paid:	$ 5,420	$ 7,135