CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash Flows from Operating Activities:
Net income	$ 374,178	$ 284,176	$ 239,555
Adjustments to reconcile net income to net cash provided by operations:
Depreciation	219,667	203,873	190,132
Amortization	44,117	44,720	43,574
Stock-based compensation	47,650	41,293	40,937
Provision for CECL	1,016	8,077	3,213
(Gain) loss on disposition of fixed assets	(52)	(3,584)	397
Net (gain) loss on remeasurement of equity securities	(1,713)	(1,413)	2,110
Deferred income taxes	(21,406)	(19,883)	(12,106)
Defined benefit plan expense	12,049	14,198	24,560
Equity in results of affiliates	(87)	(2,226)	(467)
Impairment loss	254	257	307
Change in fair value of contingent consideration	0	0	(8,598)
Changes in balance sheet items, excluding effects from foreign currency adjustments and acquisitions:
Accounts and other receivables	(18,079)	15,431	(27,937)
Inventories	21,901	(10,641)	(60,354)
Prepaid and other current assets	(2,368)	(3,900)	(6,787)
Accounts payable, accrued and other liabilities	(23,705)	14,596	55,098
Income taxes payable	4,064	(8,301)	17,081
Retirement and deferred compensation plan liabilities	(14,259)	2,984	(13,093)
Other changes, net	186	(4,418)	(9,005)
Net Cash Provided by Operations	643,413	575,239	478,617
Cash Flows from Investing Activities:
Capital expenditures	(276,481)	(312,342)	(310,427)
Proceeds from government grants	0	0	27,795
Proceeds from sale of property, plant and equipment	1,506	5,348	93
Maturity of short-term investments	0	0	740
Purchase of short-term investments	(2,242)	0	0
Acquisition of business, net of cash acquired and release of escrow	0	(16,570)	(4,100)
Acquisition of intangible assets, net	(17,709)	(6,061)	(5,189)
Investment in equity securities	(99,055)	0	0
Proceeds from sale of investment in equity securities	0	5,604	1,599
Notes receivable, net	(2,740)	(442)	(6,153)
Net Cash Used by Investing Activities	(396,721)	(324,463)	(295,642)
Cash Flows from Financing Activities:
Proceeds from notes payable and overdrafts	22,302	25,531	39,944
Repayments of notes payable and overdrafts	(23,344)	(28,643)	(38,837)
Proceeds and (repayments) of short term revolving credit facility, net	108,848	76,966	(143,055)
Proceeds from long-term obligations	168,581	403	412,021
Repayments of long-term obligations	(373,847)	(125,809)	(265,085)
Payment of contingent consideration obligation	0	(22,750)	0
Dividends paid	(114,055)	(103,683)	(99,461)
Credit facility costs	0	0	(4,009)
Proceeds from stock option exercises	54,809	53,983	28,512
Purchase of treasury stock	(68,638)	(47,552)	(92,126)
Net Cash Used by Financing Activities	(225,344)	(171,554)	(162,096)
Effect of Exchange Rate Changes on Cash	(21,147)	2,189	(1,072)
Net Increase in Cash and Equivalents and Restricted Cash	201	81,411	19,807
Cash and Equivalents and Restricted Cash at Beginning of Period	224,143	142,732	122,925
Cash and Equivalents and Restricted Cash at End of Period	224,344	224,143	142,732
Supplemental Cash Flow Disclosure:
Interest paid	43,520	39,599	35,509
Income taxes paid	89,374	111,994	87,529
Restricted cash included in the line item prepaid and other on the Consolidated Balance Sheets as shown below represents amounts held in escrow
Cash and equivalents	223,844	223,643	141,732
Restricted cash included in prepaid and other	500	500	1,000
Total Cash and Equivalents and Restricted Cash shown in the Statement of Cash Flows	$ 224,344	$ 224,143	$ 142,732