CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash Flows from Operating Activities:
Net income	$ 154,091	$ 170,523
Adjustments to reconcile net income to net cash provided by operations:
Depreciation	113,555	107,017
Amortization	9,578	7,643
Stock based compensation	14,829	15,005
Provision for (recovery of) doubtful accounts	190	124
Gain on disposition of fixed assets	(979)	67
Deferred income taxes	(5,414)	(2,265)
Defined benefit plan expense	14,466	12,932
Equity in results of affiliates	130	142
Changes in balance sheet items, excluding effects from acquisitions and foreign currency adjustments:
Accounts and other receivables	(72,620)	(46,038)
Inventories	(41,183)	(1,392)
Prepaid and other current assets	(807)	(10,839)
Accounts payable and accrued liabilities	55,921	49,158
Income taxes payable	(7,481)	2,061
Retirement and deferred compensation plan liabilities	(21,534)	(20,621)
Other changes, net	(3,157)	(18,355)
Net Cash Provided by Operations	209,585	265,162
Cash Flows from Investing Activities:
Capital expenditures	(145,321)	(120,803)
Proceeds from sale of property and equipment	4,056	2,345
Insurance proceeds	10,631
Settlement for derivative		(66,155)
Acquisition of business, net of cash acquired	(527,916)
Acquisition of intangible assets	(346)
Investment in unconsolidated affiliate	(10,000)	(5,000)
Notes receivable, net	216	451
Net Cash Used by Investing Activities	(668,680)	(189,162)
Cash Flows from Financing Activities:
Proceeds from notes payable	18,003
Repayments of notes payable	(6,395)
Proceeds and repayments of short term credit facility, net	139,384	(63,905)
Proceeds from long-term obligations	10,092	625,525
Repayments of long-term obligations	(67,026)	(4,836)
Dividends paid	(60,989)	(60,002)
Credit facility costs		(2,937)
Proceeds from stock option exercises	78,896	66,686
Purchase of treasury stock	(3,905)	(72,270)
Common stock repurchased and retired	(57,787)	(40,994)
Net Cash Provided (Used) by Financing Activities	50,273	447,267
Effect of Exchange Rate Changes on Cash	(7,436)	29,112
Net Increase (Decrease) in Cash and Equivalents and Restricted Cash	(416,258)	552,379
Cash and Equivalents and Restricted Cash at Beginning of Period	712,640	466,287
Cash and Equivalents and Restricted Cash at End of Period	$ 296,382	$ 1,018,666