CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash Flows from Operating Activities:
Net income	$ 183,630	$ 173,589	$ 124,597
Adjustments to reconcile net income to net cash provided by operations:
Depreciation	132,048	129,339	127,709
Amortization	2,195	3,620	5,304
Stock option based compensation	13,753	11,215	9,761
Provision for bad debts	1,642	(252)	701
Facilities consolidation and severance expenses	(71)	93	4,435
Deferred income taxes	2,004	503	(1,329)
Defined benefit plan expense	10,908	8,622	9,031
Equity in results of affiliates in excess of cash distributions received	17	(15)	(164)
Changes in balance sheet items, excluding effects from foreign currency adjustments and impact of acquisition:
Accounts and other receivables	(44,997)	(50,143)	34,289
Inventories	(22,332)	(47,388)	21,768
Prepaid and other current assets	(34,252)	4,390	7,437
Accounts payable and accrued liabilities	5,342	59,054	(36,724)
Income taxes payable	(9,615)	9,306	(2,947)
Retirement and deferred compensation plan liabilities	9,747	(5,657)	(32,816)
Other changes, net	11,023	(17,581)	8,737
Net cash provided by operations	261,042	278,695	279,789
Cash Flows from Investing Activities:
Capital expenditures	(179,692)	(118,804)	(144,926)
Disposition of property and equipment	1,838	1,398	1,670
Intangible assets		(459)	(308)
Acquisition of business, net of cash acquired	(14,883)	(3,014)	(7,577)
Investment in unconsolidated affiliate	(3,145)
Notes receivable, net	59	(120)	77
Net cash used by investing activities	(195,823)	(120,999)	(151,064)
Cash Flows from Financing Activities:
Proceeds from notes payable	134,563		63,670
Repayments of notes payable		(57,860)
Proceeds from long-term obligations	10,773	101,618	9,626
Repayments of long-term obligations	(50,490)	(26,766)	(26,993)
Dividends paid	(53,308)	(44,485)	(40,604)
Proceeds from stock option exercises	26,078	28,820	9,227
Purchase of treasury stock	(102,595)	(86,473)	(29,971)
Excess tax benefit from exercise of stock options	6,433	5,555	1,859
Net cash used by financing activities	(28,546)	(79,591)	(13,186)
Effect of Exchange Rate Changes on Cash	(35,484)	(34,642)	25,353
Net increase in Cash and Equivalents	1,189	43,463	140,892
Cash and Equivalents at Beginning of Period	376,427	332,964	192,072
Cash and Equivalents at End of Period	377,616	376,427	332,964
Supplemental Cash Flow Disclosure:
Interest paid	17,120	15,701	17,538
Income taxes paid	$ 79,367	$ 77,101	$ 60,931