Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating activities
Net earnings (loss)	$ 346,537	$ (19,560)	$ 49,373
Adjustments to reconcile net earnings (loss) to net cash provided by operating activities:
Depreciation and amortization	161,863	163,146	159,363
(Gain) loss on disposal of property and equipment	(2,216)	(265)	(4,054)
Accretion of interest on convertible debentures	10,769	4,984	4,610
Inventory write-offs for obsolescence	23,872	17,771	22,619
Impairment of goodwill and long-lived assets	0	0	1,559
U.S. pension settlement charges	0	0	79,321
Pensions and other postretirement benefits, net of contributions	(1,549)	(2,425)	(3,282)
Non-cash loss on disposal of equity affiliate	0	6,112	0
Gain on early extinguishment of debt	26,583	0	(4,597)
Deferred income taxes excluding impact of TCJA	(55,206)	52,377	(2,519)
Other	21,194	13,044	(1,678)
U.S. transition tax (net)	(14,757)	180,000	0
Repatriation taxes	(156,767)	0	0
Net change in operating assets and liabilities, net of effects of businesses acquired	(101,817)	(46,407)	(4,206)
Net cash provided by operating activities	258,506	368,777	296,509
Investing activities
Capital expenditures	(229,899)	(170,432)	(134,635)
Proceeds from sale of property and equipment	55,561	1,685	5,701
Purchase and deposits for businesses, net of cash acquired	(14,880)	0	0
Purchase of short-term investments	(175,403)	(749,600)	(555,250)
Maturity of short-term investments	636,108	887,729	532,601
Other investing activities	(2,058)	(4,189)	2,942
Net cash used in investing activities	269,429	(34,807)	(148,641)
Financing activities
Proceeds from long-term borrowings	600,000	0	0
Debt issuance costs	(15,621)	0	0
Repurchase of convertible debentures	(960,995)	0	0
Principal payments on long-term debt and capital leases	0	0	(34,044)
Net (payments) proceeds on revolving credit lines	(150,000)	7,000	(47,000)
Common stock repurchases	0	(39,944)	(23,159)
Net changes in short-term borrowings	15	1	(723)
Distributions to noncontrolling interests	(525)	(1,140)	(707)
Acquisition of noncontrolling interests	0	(4,100)	0
Proceeds from stock options exercised	0	1,260	356
Cash withholding taxes paid when shares withheld for vested equity awards	(2,297)	(1,971)	(542)
Other financing activities	0	(1,255)	0
Net cash provided by (used in) financing activities	(575,932)	(77,198)	(142,544)
Effect of exchange rate changes on cash and cash equivalents	(14,003)	19,479	(9,050)
Net decrease in cash and cash equivalents	(62,000)	276,251	(3,726)
Cash and cash equivalents at beginning of year	748,032	471,781	475,507
Cash and cash equivalents at end of year	686,032	748,032	471,781
Common Stock [Member]
Financing activities
Dividends and Interest Paid	(42,608)	(33,956)	(33,693)
Class B Convertible Common Stock [Member]
Financing activities
Dividends and Interest Paid	$ (3,901)	$ (3,093)	$ (3,032)