Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash Flows from Operating Activities
Net Income	$ 21,086	$ 38,215
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	21,488	23,023
Net pension benefit	(14,688)	(12,059)
Stock-based compensation expense, net	2,866	3,254
Loss (gain) on disposition of businesses, property, plant and equipment, investments and other assets, net	335	(20,449)
Foreign exchange (gain) loss	(1,728)	5,443
Equity in earnings of affiliates, net of distributions	(649)	(1,004)
Provision for deferred income taxes	7,443	2,037
Change in operating assets and liabilities:
Accounts receivable, net	122,605	41,749
Accounts payable and accrued liabilities	(55,584)	(45,930)
Deferred revenue	4,603	17,695
Income taxes receivable	(6,490)	17,926
Other assets and other liabilities, net	(9,489)	(9,187)
Other	103	169
Net Cash Provided by Operating Activities	91,901	60,882
Cash Flows from Investing Activities
Investments in certain businesses, net of cash acquired	(85,415)	(198,179)
Purchases of property, plant and equipment	(15,664)	(10,690)
Net proceeds from sales of businesses, property, plant and equipment, investments and other assets	1,748	21,285
Proceeds from sales of marketable equity securities	0	4,392
Purchases of marketable equity securities	0	(13,271)
Investments in equity affiliates and cost method investments	(865)	(389)
Return of investment in equity affiliate	200	0
Net Cash Used in Investing Activities	(99,996)	(196,852)
Cash Flows from Financing Activities
Dividends paid	(7,102)	(6,938)
Common shares repurchased	(395)	(81,346)
Other	(2,092)	13,427
Net Cash Used in Financing Activities	(9,589)	(74,857)
Effect Of Currency Exchange Rate Change	4,210	1,095
Net Decrease in Cash and Cash Equivalents and Restricted Cash	(13,474)	(209,732)
Beginning Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	670,816	774,952
Ending Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 657,342	$ 565,220