CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash Flows from Operating Activities:
Net income	$ 239,555	$ 243,638	$ 214,090
Adjustments to reconcile net income to net cash provided by operations:
Depreciation	190,132	193,781	180,513
Amortization	43,574	41,072	39,787
Stock-based compensation	40,937	38,870	34,148
Provision for CECL	3,213	1,601	865
Loss on disposition of fixed assets	397	217	2,627
Net loss (gain) on remeasurement of equity securities	2,110	(4,709)	(64)
Deferred income taxes	(12,106)	(14,356)	(8,198)
Defined benefit plan expense	24,560	29,188	23,372
Equity in results of affiliates	(467)	692	1,443
Impairment loss	307	376	0
Change in fair value of contingent consideration	(8,598)	2,768	5,230
Changes in balance sheet items, excluding effects from foreign currency adjustments and acquisitions:
Accounts and other receivables	(27,937)	(123,251)	13,455
Inventories	(60,354)	(79,961)	13,722
Prepaid and other current assets	(6,787)	(5,538)	(3,078)
Accounts payable, accrued and other liabilities	55,098	52,305	65,592
Income taxes payable	17,081	(4,631)	(6,091)
Retirement and deferred compensation plan liabilities	(13,093)	(8,726)	(7,267)
Other changes, net	(9,005)	107	7
Net Cash Provided by Operations	478,617	363,443	570,153
Cash Flows from Investing Activities:
Capital expenditures	(310,427)	(307,935)	(245,954)
Proceeds from government grants	27,795	2,003	0
Proceeds from sale of property, plant and equipment	93	5,231	5,261
Maturity of short-term investments	740	0	0
Purchase of short-term investments	0	(497)	(243)
Acquisition of business, net of cash acquired	(4,100)	(148,420)	(164,181)
Acquisition of intangible assets	(5,189)	0	(6,092)
Investment in equity securities	0	(6,870)	(39,628)
Proceeds from sale of investment in equity securities	1,599	2,434	0
Notes receivable, net	(6,153)	(3,185)	(1,141)
Net Cash Used by Investing Activities	(295,642)	(457,239)	(451,978)
Cash Flows from Financing Activities:
Proceeds from notes payable and overdrafts	39,944	14,931	22,342
Repayments of notes payable and overdrafts	(38,837)	(13,701)	(36,314)
Proceeds and repayments of short term revolving credit facility, net	(143,055)	92,863	27,000
Proceeds from long-term obligations	412,021	11,703	4,852
Repayments of long-term obligations	(265,085)	(68,845)	(64,735)
Payment of contingent consideration obligation	0	0	(2,765)
Dividends paid	(99,461)	(98,509)	(92,658)
Credit facility costs	(4,009)	(1,718)	0
Proceeds from stock option exercises	28,512	59,906	68,555
Purchase of treasury stock	(92,126)	(78,148)	0
Net Cash Used by Financing Activities	(162,096)	(81,518)	(73,723)
Effect of Exchange Rate Changes on Cash	(1,072)	(6,731)	13,545
Net Increase (Decrease) in Cash and Equivalents and Restricted Cash	19,807	(182,045)	57,997
Cash and Equivalents and Restricted Cash at Beginning of Period	122,925	304,970	246,973
Cash and Equivalents and Restricted Cash at End of Period	142,732	122,925	304,970
Supplemental Cash Flow Disclosure:
Interest paid	35,509	29,070	33,317
Income taxes paid	$ 87,529	$ 94,968	$ 93,575