Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash Flows from Operating Activities
Net Income	$ 106,512,000	$ 177,148,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and goodwill and other long-lived asset impairments	91,796,000	69,121,000
Amortization of lease right-of-use asset	32,614,000	33,245,000
Net pension benefit, early retirement programs and special separation benefit expense	(40,313,000)	(46,074,000)
Gain on marketable equity securities and cost method investments, net	(123,036,000)	(99,774,000)
Gain on disposition of a business, property, plant and equipment and investments, net	(3,481,000)	(11,755,000)
Credit loss expense and provision for other receivables	1,632,000	1,909,000
Stock-based compensation expense, net of forfeitures	3,092,000	3,334,000
Foreign exchange loss (gain)	1,083,000	(100,000)
Equity in (earnings) losses of affiliates, net of distributions	1,551,000	8,386,000
Provision for deferred income taxes	8,526,000	26,224,000
Accretion expense and change in fair value of contingent consideration liabilities	(69,000)	(4,466,000)
Change in operating assets and liabilities:
Accounts receivable, net	60,708,000	83,226,000
Inventories	(25,380,000)	(32,276,000)
Accounts payable and accrued liabilities	(28,510,000)	(50,664,000)
Deferred revenue	(68,344,000)	(48,235,000)
Income taxes receivable/payable	11,125,000	13,908,000
Lease liabilities	(31,850,000)	(34,878,000)
Other assets and other liabilities, net	54,297,000	(26,009,000)
Other	1,155,000	(31,000)
Net Cash Provided by Operating Activities	53,108,000	62,239,000
Cash Flows from Investing Activities
Purchases of property, plant and equipment	(39,560,000)	(40,909,000)
Investments in certain businesses, net of cash acquired	(3,828,000)	(237,000)
Net proceeds from disposition of a business, property, plant and equipment and investments	3,700,000	3,234,000
Investments in equity affiliates, cost method investments	(1,759,000)	(11,982,000)
Loan to related party	(2,000,000)	(30,000,000)
Proceeds from sales of marketable equity securities	0	61,979,000
Purchases of marketable equity securities	0	(6,162,000)
Other	1,663,000	1,105,000
Net Cash Used in Investing Activities	(41,784,000)	(22,972,000)
Cash Flows from Financing Activities
Common shares repurchased	(49,514,000)	(69,082,000)
Net borrowings (payments) under revolving credit facilities	33,245,000	(15,000,000)
Net proceeds from vehicle floor plan payable	26,612,000	28,982,000
Dividends paid	(15,352,000)	(15,746,000)
Repayments of borrowings	(9,883,000)	(7,983,000)
Proceeds from bank overdrafts	204,000	3,656,000
Other	(6,573,000)	(2,707,000)
Net Cash Used in Financing Activities	(21,261,000)	(77,880,000)
Effect Of Currency Exchange Rate Change	(4,339,000)	561,000
Net Decrease in Cash and Cash Equivalents and Restricted Cash	(14,276,000)	(38,052,000)
Beginning Cash and Cash Equivalents and Restricted Cash	201,891,000	190,432,000
Ending Cash and Cash Equivalents and Restricted Cash	$ 187,615,000	$ 152,380,000