CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Apr. 02, 2023	Apr. 03, 2022
Cash flows from operating activities:
Net income	$ 83,531	$ 161,928
Adjustments to reconcile net income from operations to net cash provided by operating activities:
Depreciation	22,680	22,503
Stock-based compensation	18,885	12,894
Amortization	4,926	5,233
Deferred taxes	(7,634)	11,288
(Gains) losses on investments	(2,238)	2,001
Provision for excess and obsolete inventory	5,610	1,590
Other	108	177
Changes in operating assets and liabilities
Accounts receivable	37,204	208
Inventories	(23,697)	(9,480)
Prepayments and other assets	(15,380)	(74,305)
Accounts payable and other accrued expenses	(83,208)	(124,382)
Deferred revenue and customer advances	(32,705)	6,747
Retirement plan contributions	(1,234)	(1,329)
Income taxes	12,488	(7,611)
Net cash provided by operating activities	19,336	7,462
Cash flows from investing activities:
Purchases of property, plant and equipment	(41,444)	(43,999)
Purchases of marketable securities	(69,276)	(165,977)
Proceeds from sales of marketable securities	7,929	30,581
Proceeds from maturities of marketable securities	7,468	96,682
Proceeds from life insurance	460	0
Net cash used for investing activities	(94,863)	(82,713)
Cash flows from financing activities:
Issuance of common stock under stock purchase and stock option plans	15,997	16,475
Repurchase of common stock	(93,308)	(201,465)
Payments related to net settlement of employee stock compensation awards	(19,870)	(31,048)
Dividend payments	(17,165)	(17,895)
Payments of convertible debt principal	(15,155)	(20,694)
Net cash used for financing activities	(129,501)	(254,627)
Effects of exchange rate changes on cash and cash equivalents	(537)	2,282
Decrease in cash and cash equivalents	(205,565)	(327,596)
Cash and cash equivalents at beginning of period	854,773	1,122,199
Cash and cash equivalents at end of period	649,208	794,603
Non-cash investing activities:
Capital expenditures incurred but not yet paid:	$ 3,823	$ 2,500