CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash Flows from Operating Activities:
Net income	$ 39,978	$ 43,813
Adjustments to reconcile net income to net cash provided by operations:
Depreciation	34,934	32,205
Amortization	1,237	349
Stock option based compensation	6,534	5,774
(Recovery)/Provision for doubtful accounts	(311)	(721)
Deferred income taxes	(4,668)	(252)
Defined benefit plan expense	5,123	3,585
Equity in results of affiliates in excess of cash distributions received	262	131
Changes in balance sheet items, excluding effects from foreign currency adjustments:
Accounts receivable	(52,022)	(42,498)
Inventories	(9,720)	(8,818)
Prepaid and other current assets	(8,947)	265
Accounts payable and accrued liabilities	5,528	5,015
Income taxes payable	4,509	4,033
Retirement and deferred compensation plans	(3,118)	(6,338)
Other changes, net	6,790	(22,885)
Net Cash Provided/(Used) by Operations	26,109	13,658
Cash Flows from Investing Activities:
Capital expenditures	(34,832)	(42,496)
Disposition of property and equipment	2,162	771
Investment in unconsolidated affiliate		(279)
Notes receivable, net		20
Net Cash Used by Investing Activities	(32,670)	(41,984)
Cash Flows from Financing Activities:
Proceeds/(Repayments) from notes payable	14,754	(31,967)
Repayments of long-term obligations	(585)	(761)
Dividends paid	(16,493)	(14,530)
Credit facility costs	(497)	(1,121)
Proceeds from stock option exercises	19,540	19,674
Purchase of treasury stock	(10,768)	(10,096)
Excess tax benefit from exercise of stock options	2,403	6,433
Net Cash Provided/(Used) by Financing Activities	8,354	(32,368)
Effect of Exchange Rate Changes on Cash	(6,444)	12,883
Net Decrease in Cash and Equivalents	(4,651)	(47,811)
Cash and Equivalents at Beginning of Period	229,755	377,616
Cash and Equivalents at End of Period	$ 225,104	$ 329,805