Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018
Operating activities
Net earnings	$ 120,376	$ 165,807
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	81,346	81,174
(Gain) loss on disposal of property and equipment	(162)	(2,242)
Accretion of interest on convertible debt instruments	6,985	2,964
Inventory write-offs for obsolescence	12,643	11,799
Deferred income taxes	(5,601)	(25,669)
Loss on extinguishment of debt	1,307	17,309
Other	4,283	4,148
Change in U.S. transition tax liability	(14,757)	(14,400)
Change in repatriation tax liability	(20,479)	(92,093)
Net change in operating assets and liabilities, net of effects of businesses acquired	(50,122)	(110,627)
Net cash provided by operating activities	135,819	38,170
Investing activities
Capital expenditures	(70,148)	(76,646)
Proceeds from sale of property and equipment	464	8,378
Purchase of businesses, net of cash received	(11,862)	(14,880)
Purchase of short-term investments	(1,970)	(50,193)
Maturity of short-term investments	79,694	447,359
Other investing activities	2,893	(935)
Net cash provided by (used in) investing activities	(929)	313,083
Financing activities
Proceeds from long-term borrowings	0	600,000
Issuance costs	(5,394)	(15,621)
Repurchase of convertible debentures	(22,695)	(584,991)
Net proceeds (payments) on revolving credit lines	28,000	(54,000)
Net changes in short-term borrowings	22	119
Distributions to noncontrolling interests	(600)	(525)
Cash withholding taxes paid when shares withheld for vested equity awards	(2,708)	(2,297)
Net cash used in financing activities	(29,375)	(79,308)
Effect of exchange rate changes on cash and cash equivalents	(641)	(12,921)
Net increase in cash and cash equivalents	104,874	259,024
Cash and cash equivalents at beginning of period	686,032	748,032
Cash and cash equivalents at end of period	790,906	1,007,056
Common Stock [Member]
Financing activities
Dividends paid to common stockholders	(23,822)	(20,148)
Class B Convertible Common Stock [Member]
Financing activities
Dividends paid to common stockholders	$ (2,178)	$ (1,845)