Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash Flows from Operating Activities:
Net Income	$ (7,170)	$ 35,614
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	160,480	193,960
Deferred income tax provision	(25,065)	(6,704)
Inventory Write-down		30,490
Net loss (gain) on sales of property and equipment	429	516
Noncash compensation	10,854	10,546
Excluding the effects of acquisitions, increase (decrease) in cash from:
Accounts receivable	25,501	102,361
Inventory	35,000	768
Other operating assets	(20,162)	57,879
Currency translation effect on working capital	253	15,592
Current liabilities	(56,148)	(161,488)
Other operating liabilities	20,042	(17,861)
Total adjustments to net income	151,184	226,059
Net Cash Provided by Operating Activities	144,014	261,673
Cash Flows from Investing Activities:
Purchases of property and equipment	(59,900)	(83,389)
Payments to Acquire Businesses, Net of Cash Acquired	(11,278)	(2,500)
Payments for (Proceeds from) Other Investing Activities	10,777	39,818
Distributions of capital from unconsolidated affiliates	2,556	5,108
Dispositions of property and equipment	635	3,217
Net Cash Used in Investing Activities	(78,764)	(117,382)
Cash Flows from Financing Activities:
Cash Dividends	(44,220)	(79,429)
Proceeds from (Payments for) Other Financing Activities	(1,772)	(1,927)
Net Cash Provided by (Used in) Financing Activities	(45,992)	(81,356)
Effect of Exchange Rate on Cash and Cash Equivalents	2,930	(6,545)
Net Increase (Decrease) in Cash and Cash Equivalents	22,188	56,390
Cash and Cash Equivalents-Beginning of Period	450,193	385,235
Cash and Cash Equivalents-End of Period	$ 472,381	$ 441,625