Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash Flows From Operating Activities
Net income	$ 18,997	$ 22,364
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	13,419	12,226
Deferred compensation	4,933	3,499
Realized and unrealized gain on long-term investments	(898)	(1,446)
Stock-based compensation	(219)	628
Deferred income taxes	(2,524)	(814)
Other non-cash items	1,708	916
Changes in assets and liabilities:
Receivables, net	(31,815)	(23,346)
Inventories	(16,488)	(23,222)
Other current assets	(1,097)	(1,691)
Accounts payable and accrued liabilities	5,460	18,054
Pension liabilities	456	(693)
Environmental and legal liabilities	(28)	376
Deferred revenues	(101)	(292)
Excess tax benefit from stock options and awards	(1,705)	(1,878)
Net Cash Provided By (Used In) Operating Activities	(9,902)	4,681
Cash Flows From Investing Activities
Expenditures for property, plant and equipment	(20,980)	(21,322)
Sale of mutual funds	390	535
Other, net	(2,322)	(1,582)
Net Cash Used In Investing Activities	(22,912)	(22,369)
Cash Flows From Financing Activities
Revolving debt and bank overdrafts, net	17,542	1,974
Other debt repayments	(5,190)	(1,458)
Dividends paid	(3,542)	(3,072)
Company stock repurchased		(500)
Stock option exercises	1,875	1,896
Excess tax benefit from stock options and awards	1,705	1,878
Payment to noncontrolling interest (Note 14)		(2,000)
Other, net	(1,059)	(1,258)
Net Cash Provided By (Used In) Financing Activities	11,331	(2,540)
Effect of Exchange Rate Changes on Cash	(622)	775
Net Decrease in Cash and Cash Equivalents	(22,105)	(19,453)
Cash and Cash Equivalents at Beginning of Period	76,875	84,099
Cash and Cash Equivalents at End of Period	54,770	64,646
Supplemental Cash Flow Information
Cash payments of income taxes, net of refunds	2,999	3,635
Cash payments of interest	$ 652	$ 912