Consolidated Condensed Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Oct. 01, 2016
Operating activities
Net earnings	$ 157,941	$ 97,977
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	121,319	119,143
(Gain) loss on disposal of property and equipment	(106)	(1,373)
Accretion of interest on convertible debentures	3,703	3,425
Inventory write-offs for obsolescence	12,157	17,085
Impairment of goodwill and long-lived assets	0	1,559
Deferred income taxes	9,115	(1,750)
Non-cash loss on disposal of equity affiliate	7,060	0
Gain on early extinguishment of debt	0	(4,597)
Other	6,531	(4,944)
Net change in operating assets and liabilities, net of effects of businesses acquired	(71,875)	(13,455)
Net cash provided by operating activities	245,845	213,070
Investing activities
Capital expenditures	(84,790)	(81,346)
Proceeds from sale of property and equipment	1,484	1,241
Purchase of short-term investments	(598,937)	(472,938)
Maturity of short-term investments	610,573	491,867
Other investing activities	(6,663)	2,886
Net cash provided by (used in) investing activities	(78,333)	(58,290)
Financing activities
Principal payments on long-term debt and capital leases	0	(34,044)
Net proceeds (payments) on revolving credit lines	(5,000)	(41,000)
Common stock repurchase	(37,564)	(16,981)
Net changes in short-term borrowings	22	(626)
Proceeds from stock options exercised	1,260	0
Distributions to noncontrolling interests	(1,140)	(707)
Acquisition of noncontrolling interests	(4,100)	0
Cash withholding taxes paid when shares withheld for vested equity awards	(1,971)	(442)
Other financing activities	(1,255)	0
Net cash provided by (used in) financing activities	(77,076)	(121,403)
Effect of exchange rate changes on cash and cash equivalents	13,168	2,703
Net increase (decrease) in cash and cash equivalents	103,604	36,080
Cash and cash equivalents at beginning of period	471,781	475,507
Cash and cash equivalents at end of period	575,385	511,587
Common Stock [Member]
Financing activities
Dividends and Interest Paid	(25,054)	(25,329)
Class B Convertible Common Stock [Member]
Financing activities
Dividends and Interest Paid	$ (2,274)	$ (2,274)