Condensed Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash Flows from Operating Activities
Net Income	$ 81,702,000	$ 42,965,000
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization	26,583,000	25,026,000
Amortization of lease right-of-use asset	20,353,000	0
Net pension benefit	(13,653,000)	(17,295,000)
(Gain) loss on marketable equity securities and cost method investments, net	(25,357,000)	14,102,000
Stock-based compensation expense, net	1,611,000	2,111,000
Gain on disposition of businesses, property, plant and equipment and investments, net	(29,204,000)	(8,739,000)
Foreign exchange gain	(514,000)	(177,000)
Gain on sale of equity affiliate	(28,994,000)	0
Equity in earnings of affiliates, net of distributions	1,021,000	(2,115,000)
Provision (benefit) for deferred income taxes	5,892,000	(7,436,000)
Change in operating assets and liabilities:
Accounts receivable, net	30,556,000	87,311,000
Inventories	(8,807,000)	(5,429,000)
Accounts payable and accrued liabilities	(84,663,000)	(85,955,000)
Deferred revenue	(16,459,000)	(8,783,000)
Income taxes receivable	17,964,000	18,718,000
Other assets and other liabilities, net	(45,327,000)	(35,757,000)
Other	380,000	404,000
Net Cash (Used in) Provided by Operating Activities	(37,922,000)	18,951,000
Cash Flows from Investing Activities
Investments in certain businesses, net of cash acquired	(83,721,000)	(2,619,000)
Net proceeds (payments) from disposition of businesses, property, plant and equipment and investments	34,718,000	(17,890,000)
Purchases of property, plant and equipment	(28,252,000)	(17,506,000)
Proceeds from sales of marketable equity securities	17,162,000	49,635,000
Purchases of marketable equity securities	(7,499,000)	0
Investments in equity affiliates, cost method and other investments	(3,401,000)	(4,552,000)
Loan to related party and advance related to Kaplan University transaction	(3,500,000)	(20,000,000)
Return of investment in equity affiliates	615,000	1,402,000
Net Cash Used in Investing Activities	(73,878,000)	(11,530,000)
Cash Flows from Financing Activities
Common shares repurchased	0	(79,001,000)
Issuance of borrowings	30,000,000	0
Net proceeds from vehicle floor plan payable	9,529,000	0
Dividends paid	(7,391,000)	(7,319,000)
Contribution of noncontrolling interest	6,000,000	0
Other	(1,104,000)	(4,653,000)
Net Cash Provided by (Used in) Financing Activities	37,034,000	(90,973,000)
Effect Of Currency Exchange Rate Change	1,776,000	4,171,000
Net Decrease in Cash and Cash Equivalents and Restricted Cash	(72,990,000)	(79,381,000)
Beginning Cash and Cash Equivalents and Restricted Cash	264,115,000	407,566,000
Ending Cash and Cash Equivalents and Restricted Cash	$ 191,125,000	$ 328,185,000