CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net income	$ 362,131	$ 767,042	$ 645,607
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	631,508	612,702	563,582
Amortization of deferred debt issuance costs and premiums	3,523	3,247	2,508
Deferred income taxes	13,394	(11,623)	10,676
Gain on disposal of fixed assets, net	(2,200)	(2,807)	(1,446)
Share-based compensation	8,277	13,562	10,970
Other, net	16,660	(1,957)	13,752
Changes in assets and liabilities:
Accounts receivable	205,491	(103,990)	(298,854)
Inventories	233,797	(148,137)	(190,555)
Other current assets	2,673	(23,802)	5,335
Other assets	10,875	(34,835)	14,746
Trade accounts payable	(134,618)	86,574	215,646
Accrued expenses	(48,389)	(40,637)	108,283
Pension and severance obligations	(844)	(10,547)	(30,013)
Net operating lease ROU asset	50,650	(14,483)	(14,781)
Operating lease liabilities	(52,543)	1,574	16,293
Other non-current liabilities	(30,365)	6,873	49,546
Net cash provided by operating activities	1,270,020	1,098,756	1,121,295
Cash flows from investing activities:
Payments for property, plant and equipment	(749,467)	(908,294)	(779,779)
Proceeds from sale of property, plant and equipment	8,444	3,148	3,157
Proceeds from foreign exchange forward contracts	44,013	33,578	16,608
Payments for foreign exchange forward contracts	(75,786)	(104,703)	(69,835)
Payments for short-term investments	(657,583)	(438,803)	(414,208)
Proceeds from sale of short-term investments	94,242	33,972	87,273
Proceeds from maturities of short-term investments	379,344	370,924	204,679
Other investing activities	4,883	3,009	8,226
Net cash used in investing activities	(951,910)	(1,007,169)	(943,879)
Cash flows from financing activities:
Proceeds from revolving credit facilities	370,000	80,000	0
Payments of revolving credit facilities	(370,000)	(80,000)	0
Proceeds from short-term debt	20,712	29,711	15,514
Payments of short-term debt	(19,448)	(27,187)	(19,927)
Proceeds from issuance of long-term debt	168,335	366,386	353,587
Payments of long-term debt	(175,427)	(214,290)	(316,635)
Payments for debt issuance costs	(1,385)	(7,297)	(1,294)
Payments of finance lease obligations	(66,398)	(40,673)	(20,373)
Proceeds from issuance of stock through share-based compensation plans	3,562	5,635	12,787
Payments of dividends	(74,686)	(55,116)	(51,213)
Other financing activities	(4,472)	(1,572)	(2,548)
Net cash (used in) provided by financing activities	(149,207)	55,597	(30,102)
Effect of exchange rate fluctuations on cash, cash equivalents and restricted cash	(10,692)	(16,299)	(17,990)
Net increase in cash, cash equivalents and restricted cash	158,211	130,885	129,324
Cash, cash equivalents and restricted cash, beginning of period	962,406	831,521	702,197
Cash, cash equivalents and restricted cash, end of period	1,120,617	962,406	831,521
Cash paid during the period for:
Interest	54,306	54,355	46,932
Income taxes	90,458	97,333	24,011
Non-cash investing and financing activities:
Property, plant and equipment included in capital expenditures payable	104,109	142,160	211,421
Right of use assets acquired through operating lease liabilities	6,270	64,849	63,314
Right of use assets acquired through finance lease liabilities	58,232	58,166	73,894
Dividends declared and unpaid	$ 0	$ 25	$ 58