CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jul. 03, 2022	Jul. 04, 2021
Cash flows from operating activities:
Net income	$ 359,715	$ 533,831
Adjustments to reconcile net income from operations to net cash provided by operating activities:
Depreciation	44,460	45,848
Stock-based compensation	25,122	23,231
Amortization	10,095	19,343
Deferred taxes	(23,597)	(800)
Losses (gains) on investments	8,973	(4,650)
Provision for excess and obsolete inventory	6,695	3,625
Contingent consideration fair value adjustments	0	(7,227)
Loss on convertible debt conversions	0	5,244
Retirement plan actuarial (gains) losses	0	(627)
Other	522	199
Changes in operating assets and liabilities, net of businesses acquired:
Accounts receivable	(146,384)	(372,698)
Inventories	(46,682)	19,908
Prepayments and other assets	(94,751)	(117,416)
Accounts payable and other liabilities	(43,611)	86,790
Deferred revenue and customer advances	14,163	15,189
Retirement plans contributions	(2,618)	(2,739)
Income taxes	10,815	(2,628)
Net cash provided by operating activities	122,917	244,423
Cash flows from investing activities:
Purchases of property, plant and equipment	(89,743)	(73,957)
Purchases of marketable securities	(247,881)	(398,086)
Proceeds from maturities of marketable securities	139,652	460,213
Proceeds from sales of marketable securities	143,642	116,112
Purchase of investment	0	(12,000)
Net cash provided by (used for) investing activities	(54,330)	92,282
Cash flows from financing activities:
Issuance of common stock under stock purchase and stock option plans	16,536	32,581
Repurchase of common stock	(532,799)	(196,584)
Payments related to net settlement of employee stock compensation awards	(32,780)	(31,794)
Payments of convertible debt principal	(42,292)	(66,828)
Dividend payments	(35,442)	(33,271)
Net cash used for financing activities	(626,777)	(295,896)
Effects of exchange rate changes on cash and cash equivalents	8,014	(489)
(Decrease) increase in cash and cash equivalents	(550,176)	40,320
Cash and cash equivalents at beginning of period	1,122,199	914,121
Cash and cash equivalents at end of period	572,023	954,441
Non-cash investing activities:
Capital expenditures incurred but not yet paid	$ 1,855	$ 4,503