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	$ 284,176	$ 239,555	$ 243,638
Adjustments to reconcile net income to net cash provided by operations:
Depreciation	203,873	190,132	193,781
Amortization	44,720	43,574	41,072
Stock-based compensation	41,293	40,937	38,870
Provision for CECL	8,077	3,213	1,601
(Gain) loss on disposition of fixed assets	(3,584)	397	217
Net (gain) loss on remeasurement of equity securities	(1,413)	2,110	(4,709)
Deferred income taxes	(19,883)	(12,106)	(14,356)
Defined benefit plan expense	14,198	24,560	29,188
Equity in results of affiliates	(2,226)	(467)	692
Impairment loss	257	307	376
Change in fair value of contingent consideration	0	(8,598)	2,768
Changes in balance sheet items, excluding effects from foreign currency adjustments and acquisitions:
Accounts and other receivables	15,431	(27,937)	(123,251)
Inventories	(10,641)	(60,354)	(79,961)
Prepaid and other current assets	(3,900)	(6,787)	(5,538)
Accounts payable, accrued and other liabilities	14,596	55,098	52,305
Income taxes payable	(8,301)	17,081	(4,631)
Retirement and deferred compensation plan liabilities	2,984	(13,093)	(8,726)
Other changes, net	(4,418)	(9,005)	107
Net Cash Provided by Operations	575,239	478,617	363,443
Cash Flows from Investing Activities:
Capital expenditures	(312,342)	(310,427)	(307,935)
Proceeds from government grants	0	27,795	2,003
Proceeds from sale of property, plant and equipment	5,348	93	5,231
Maturity of short-term investments	0	740	0
Purchase of short-term investments	0	0	(497)
Acquisition of business, net of cash acquired and release of escrow	(16,570)	(4,100)	(148,420)
Acquisition of intangible assets, net	(6,061)	(5,189)	0
Investment in equity securities	0	0	(6,870)
Proceeds from sale of investment in equity securities	5,604	1,599	2,434
Notes receivable, net	(442)	(6,153)	(3,185)
Net Cash Used by Investing Activities	(324,463)	(295,642)	(457,239)
Cash Flows from Financing Activities:
Proceeds from notes payable and overdrafts	25,531	39,944	14,931
Repayments of notes payable and overdrafts	(28,643)	(38,837)	(13,701)
Proceeds and (repayments) of short term revolving credit facility, net	76,966	(143,055)	92,863
Proceeds from long-term obligations	403	412,021	11,703
Repayments of long-term obligations	(125,809)	(265,085)	(68,845)
Payment of contingent consideration obligation	(22,750)	0	0
Dividends paid	(103,683)	(99,461)	(98,509)
Credit facility costs	0	(4,009)	(1,718)
Proceeds from stock option exercises	53,983	28,512	59,906
Purchase of treasury stock	(47,552)	(92,126)	(78,148)
Net Cash Used by Financing Activities	(171,554)	(162,096)	(81,518)
Effect of Exchange Rate Changes on Cash	2,189	(1,072)	(6,731)
Net Increase (Decrease) in Cash and Equivalents and Restricted Cash	81,411	19,807	(182,045)
Cash and Equivalents and Restricted Cash at Beginning of Period	142,732	122,925	304,970
Cash and Equivalents and Restricted Cash at End of Period	224,143	142,732	122,925
Supplemental Cash Flow Disclosure:
Interest paid	39,599	35,509	29,070
Income taxes paid	111,994	87,529	94,968
Restricted cash included in the line item prepaid and other on the Condensed Consolidated Balance Sheets as shown below represents amounts held in escrow.
Cash and equivalents	223,643	141,732	122,925
Restricted cash included in prepaid and other	500	1,000	0
Total Cash and Equivalents and Restricted Cash shown in the Statement of Cash Flows	$ 224,143	$ 142,732	$ 122,925