Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash Flows from Operating Activities
Net Income	$ 353,327	$ 299,968	$ 327,879
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and goodwill and other long-lived asset impairment	162,225	161,207	121,648
Amortization of lease right-of-use asset	73,752	89,956	84,185
Net pension benefit, settlement, and special separation benefit expense	(91,898)	(41,573)	(137,909)
Gain on marketable equity securities and cost method investments, net	(254,844)	(57,669)	(103,748)
Credit loss expense and provision for other receivables	6,824	10,667	22,726
Stock-based compensation expense, net	5,659	6,348	6,278
Contingent consideration fair value measurements and accretion	(4,207)	2,895	0
Foreign exchange loss	179	2,153	1,070
Gain on disposition and write-downs of businesses, property, plant and equipment, investments and other assets, net	(8,554)	(214,926)	(28,346)
Equity in earnings of affiliates, net of distributions	4,917	6,592	(2,678)
Provision for deferred income taxes	65,046	14,377	69,751
Change in operating assets and liabilities:
Accounts receivable	(59,292)	61,328	(53,602)
Inventories	4,551	3,786	(5,317)
Accounts payable and accrued liabilities	32,397	(32,714)	(47,069)
Deferred revenue	19,086	(25,728)	30,487
Income taxes receivable/payable	(8,689)	3,310	1,828
Lease liabilities	(85,147)	(91,478)	(88,597)
Other assets and other liabilities, net	(14,144)	11,735	(33,655)
Other	1,238	429	233
Net Cash Provided by Operating Activities	202,426	210,663	165,164
Cash Flows from Investing Activities
Investments in certain businesses, net of cash acquired	(351,882)	(20,080)	(179,421)
Purchases of property, plant and equipment	(162,537)	(69,591)	(93,504)
Proceeds from sales of marketable equity securities	65,499	93,775	19,303
Purchases of marketable equity securities	(48,036)	(20,004)	(7,499)
Net proceeds from sales of businesses, property, plant and equipment and other assets	10,295	225,570	54,495
Investments in equity affiliates, cost method and other investments	(8,531)	(12,367)	(27,529)
Loans to related party	0	0	(3,500)
Other	557	2,068	920
Net Cash (Used in) Provided by Investing Activities	(494,635)	199,371	(236,735)
Cash Flows from Financing Activities
Net borrowings under revolving credit facilities	134,696	76,241	0
Issuance of borrowings	70,184	2,084	41,250
Common shares repurchased	(55,683)	(161,829)	(2,103)
Repayments of borrowings	(49,645)	(83,360)	(8,702)
Deferred payments of acquisitions	(30,866)	(19,348)	(2,255)
Dividends paid	(30,136)	(29,970)	(29,553)
Net (repayments of) proceeds from vehicle floor plan payable	(10,563)	(14,160)	14,384
Issuance of noncontrolling interest	3,777	0	6,000
Purchase of noncontrolling interest	(3,508)	0	(550)
Proceeds from (repayments of) bank overdrafts	3,410	1,636	(185)
Proceeds from exercise of stock options	0	25,129	481
Other	(639)	(425)	(33)
Net Cash Provided by (Used in) Financing Activities	31,027	(204,002)	18,734
Effect of Currency Exchange Rate Change	(3,029)	2,978	2,766
Net (Decrease) Increase in Cash and Cash Equivalents and Restricted Cash	(264,211)	209,010	(50,071)
Cash and Cash Equivalents and Restricted Cash at Beginning of Year	423,054	214,044	264,115
Cash and Cash Equivalents and Restricted Cash at End of Year	158,843	423,054	214,044
Cash paid during the year for:
Income taxes	39,000	91,000	28,000
Interest	$ 30,000	$ 31,000	$ 30,000