CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash Flows from Operating Activities:
Net income	$ 171,926	$ 162,420	$ 183,630
Adjustments to reconcile net income to net cash provided by operations:
Depreciation	144,923	133,845	132,048
Amortization	5,033	3,177	2,195
Stock option based compensation	13,728	12,695	13,753
(Recoveries of)/provisions for bad debts	(385)	(595)	1,642
Deferred income taxes	6,844	(9,015)	2,004
Defined benefit plan expense	19,408	14,611	10,908
Equity in results of affiliates in excess of cash distributions received	883	457	17
Changes in balance sheet items, excluding effects from foreign currency adjustments and impact of acquisition:
Accounts and other receivables	(32,806)	16,689	(44,997)
Inventories	(29,918)	(19,712)	(22,332)
Prepaid and other current assets	(6,394)	10,124	(34,252)
Accounts payable and accrued liabilities	1,144	(824)	5,271
Income taxes payable	16,712	2,969	(9,615)
Retirement and deferred compensation plan liabilities	(19,441)	(2,073)	(11,240)
Other changes, net	(6,221)	(10,876)	32,010
Net cash provided by operations	285,436	313,892	261,042
Cash Flows from Investing Activities:
Capital expenditures	(151,510)	(174,053)	(179,692)
Disposition of property and equipment	436	2,629	1,838
Intangible assets	(725)
Acquisition of business, net of cash acquired		(187,840)	(14,883)
Investment in unconsolidated affiliate	(5,256)	(279)	(3,145)
Notes receivable, net	(65)	84	59
Net cash used by investing activities	(157,120)	(359,459)	(195,823)
Cash Flows from Financing Activities:
Proceeds from notes payable	94,184		134,563
Repayments of notes payable		(134,034)
Proceeds from long-term obligations		125,000	10,773
Repayments of long-term obligations	(25,326)	(3,042)	(50,490)
Dividends paid	(66,133)	(58,442)	(53,308)
Credit facility costs	(498)	(1,518)
Proceeds from stock option exercises	43,348	44,637	26,078
Purchase of treasury stock	(118,813)	(79,793)	(102,595)
Excess tax benefit from exercise of stock options	6,104	7,809	6,433
Net cash used by financing activities	(67,134)	(99,383)	(28,546)
Effect of Exchange Rate Changes on Cash	18,924	(2,911)	(35,484)
Net increase/(decrease) in Cash and Equivalents	80,106	(147,861)	1,189
Cash and Equivalents at Beginning of Period	229,755	377,616	376,427
Cash and Equivalents at End of Period	309,861	229,755	377,616
Supplemental Cash Flow Disclosure:
Interest paid	20,679	17,464	17,120
Income taxes paid	$ 47,445	$ 64,523	$ 79,367