CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Apr. 02, 2023
Cash flows from operating activities:
Net income	$ 64,197	$ 83,531
Adjustments to reconcile net income from operations to net cash provided by operating activities:
Depreciation	23,354	22,680
Stock-based compensation	15,758	18,885
Provision for excess and obsolete inventory	6,177	5,610
Amortization	4,766	4,926
Deferred taxes	(9,669)	(7,634)
Losses (gains) on investments	10,466	(2,238)
Other	787	108
Changes in operating assets and liabilities
Accounts receivable	(8,055)	37,204
Inventories	(6,932)	(23,697)
Prepayments and other assets	11,089	(15,380)
Accounts payable and other liabilities	(105,548)	(83,208)
Deferred revenue and customer advances	(1,444)	(32,705)
Retirement plans contributions	(1,421)	(1,234)
Income taxes	3,754	12,488
Net cash provided by operating activities	7,279	19,336
Cash flows from investing activities:
Purchases of property, plant and equipment	(44,023)	(41,444)
Purchases of marketable securities	(16,042)	(69,276)
Proceeds from maturities of marketable securities	14,438	7,468
Proceeds from sales of marketable securities	20,734	7,929
Proceeds from insurance	873	460
Net cash used for investing activities	(24,020)	(94,863)
Cash flows from financing activities:
Repurchase of common stock	(22,117)	(93,308)
Dividend payments	(18,370)	(17,165)
Payments of convertible debt principal	0	(15,155)
Payments related to net settlement of employee stock compensation awards	(13,115)	(19,870)
Issuance of common stock under stock purchase and stock option plans	16,934	15,997
Net cash used for financing activities	(36,668)	(129,501)
Effects of exchange rate changes on cash and cash equivalents	3,241	(537)
Decrease in cash and cash equivalents	(50,168)	(205,565)
Cash and cash equivalents at beginning of period	757,571	854,773
Cash and cash equivalents at end of period	707,403	649,208
Non-cash investing activities:
Capital expenditures incurred but not yet paid:	$ 3,086	$ 3,823