CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash Flows from Operating Activities:
Net income	$ 101,492	$ 89,858
Adjustments to reconcile net income to net cash provided by operations:
Depreciation	72,946	72,303
Amortization	2,767	2,482
Stock based compensation	12,058	9,324
Recovery of doubtful accounts	(69)	(723)
Deferred income taxes	(3,808)	(6,756)
Defined benefit plan expense	8,452	9,668
Equity in results of affiliates in excess of cash distributions received	1,744	323
Changes in balance sheet items, excluding effects from foreign currency adjustments:
Accounts receivable	(71,208)	(67,815)
Inventories	(19,565)	(22,591)
Prepaid and other current assets	(5,868)	(9,670)
Accounts payable and accrued liabilities	17,898	19,745
Income taxes payable	(21,572)	9,258
Retirement and deferred compensation plans	(6,559)	(7,752)
Other changes, net	20,920	11,954
Net Cash Provided by Operations	109,628	109,608
Cash Flows from Investing Activities:
Capital expenditures	(87,068)	(71,741)
Disposition of property and equipment	2,287	2,946
Investment in unconsolidated affiliate		(13)
Notes receivable, net	(163)	(159)
Net Cash Used by Investing Activities	(84,944)	(68,967)
Cash Flows from Financing Activities:
Proceeds (Repayments) of notes payable	77,019	(37,407)
Repayments of long-term obligations	(308)	(1,537)
Dividends paid	(34,693)	(33,103)
Credit facility costs	(299)	(498)
Proceeds from stock option exercises	19,391	31,100
Purchase of treasury stock	(52,884)	(44,588)
Excess tax benefit from exercise of stock options	3,802	3,912
Net Cash Provided (Used) by Financing Activities	12,028	(82,121)
Effect of Exchange Rate Changes on Cash	(5,285)	1,715
Net Increase (Decrease) in Cash and Equivalents	31,427	(39,765)
Cash and Equivalents at Beginning of Period	309,861	229,755
Cash and Equivalents at End of Period	$ 341,288	$ 189,990