CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023
Cash flows from operating activities:
Net income	$ 396,119	$ 331,698
Adjustments to reconcile net income from operations to net cash provided by operating activities:
Depreciation	74,480	68,858
Stock-based compensation	45,267	45,236
Provision for excess and obsolete inventory	15,516	23,069
Amortization	14,133	14,083
Losses (gains) on investments	10,139	(3,159)
Equity in net earnings of affiliate	1,075
Gain on sale of business	(57,486)	0
Deferred taxes	(26,261)	(24,026)
Retirement plan actuarial losses (gains)	(2,512)	0
Other	(5,041)	(13)
Changes in operating assets and liabilities
Accounts receivable	(65,266)	30,191
Inventories	11,127	6,395
Prepayments and other assets	61,438	(63,982)
Accounts payable and other liabilities	(63,666)	3,999
Deferred revenue and customer advances	3,624	(49,517)
Retirement plans contributions	(4,169)	(3,698)
Income taxes	(18,898)	(42,683)
Net cash provided by operating activities	389,619	336,451
Cash flows from investing activities:
Purchases of property, plant and equipment	(140,710)	(115,306)
Purchase of investment in a business	(527,060)	0
Purchases of marketable securities	(35,097)	(137,786)
Issuance of convertible loan		(5,000)
Proceeds from the sale of a business, net of cash and cash equivalents sold	90,348	0
Proceeds from maturities of marketable securities	33,163	71,447
Proceeds from sales of marketable securities	23,600	36,963
Proceeds from insurance	873	460
Net cash used for investing activities	(554,883)	(149,222)
Cash flows from financing activities:
Repayments of borrowings on revolving credit facility	(185,000)	0
Dividend payments	(56,936)	(51,081)
Repurchase of common stock	(55,053)	(346,492)
Payments related to net settlement of employee stock compensation awards	(13,833)	(20,586)
Payments of convertible debt principal	0	(26,735)
Proceeds from borrowings on revolving credit facility	185,000	0
Issuance of common stock under stock purchase and stock option plans	37,265	34,084
Net cash used for financing activities	(88,557)	(410,810)
Effects of exchange rate changes on cash and cash equivalents	6,286	5,769
Decrease in cash and cash equivalents	(247,535)	(217,812)
Cash and cash equivalents at beginning of period	757,571	854,773
Cash and cash equivalents at end of period	510,036	636,961
Non-cash investing activities:
Capital expenditures incurred but not yet paid:	$ 3,679	$ 2,392