Consolidated Condensed Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jul. 03, 2021	Jul. 04, 2020
Operating activities
Net earnings	$ 165,024	$ 52,279
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	83,879	82,158
(Gain) loss on disposal of property and equipment	(207)	(43)
Accretion of interest on convertible debt instruments	0	7,125
Inventory write-offs for obsolescence	9,550	11,587
Deferred income taxes	519	(4,370)
Loss on extinguishment of debt	0	4,066
Other	5,758	954
Change in U.S. transition tax liability	(14,757)	0
Change in repatriation tax liability	0	(16,258)
Net change in operating assets and liabilities	(74,983)	(12,589)
Net cash provided by operating activities	174,783	124,909
Investing activities
Capital expenditures	(60,710)	(48,832)
Proceeds from sale of property and equipment	234	230
Purchase of short-term investments	(27,488)	(157,086)
Maturity of short-term investments	53,679	108,044
Other investing activities	347	(529)
Net cash provided by (used in) investing activities	(33,938)	(98,173)
Financing activities
Repurchase of convertible debt instruments	(300)	(90,525)
Net proceeds (payments) on revolving credit lines	0	0
Net changes in short-term borrowings	0	(113)
Distributions to noncontrolling interests	(800)	(600)
Cash withholding taxes paid when shares withheld for vested equity awards	(1,963)	(2,016)
Net cash provided by (used in) financing activities	(30,577)	(120,738)
Effect of exchange rate changes on cash and cash equivalents	(3,383)	(201)
Net increase (decrease) in cash and cash equivalents	106,885	(94,203)
Cash and cash equivalents at beginning of period	619,874	694,133
Cash and cash equivalents at end of period	726,759	599,930
Common Stock [Member]
Financing activities
Dividends paid to common stockholders	(25,216)	(25,185)
Class B Convertible Common Stock [Member]
Financing activities
Dividends paid to common stockholders	$ (2,298)	$ (2,299)