Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash Flows From Operating Activities
Net income	$ 63,161	$ 50,856
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	49,653	47,933
Deferred compensation	1,228	(9,755)
Realized and unrealized (gains) losses on long-term investments	293	(743)
Stock-based compensation	2,961	606
Deferred income taxes	107	1,996
Other non-cash items	1,867	4,508
Changes in assets and liabilities:
Receivables, net	(10,338)	(30,987)
Inventories	(5,515)	(28,277)
Other current assets	(1,572)	154
Accounts payable and accrued liabilities	23,946	8,375
Pension liabilities	576	(2,267)
Environmental and legal liabilities	(1,503)	3,667
Deferred revenues	(1,063)	(549)
Excess tax benefit from stock options and awards	(260)	(621)
Net Cash Provided By Operating Activities	123,541	44,896
Cash Flows From Investing Activities
Expenditures for property, plant and equipment	(90,328)	(62,413)
Business acquisition (Note 16)	(5,133)
Proceeds from sale of product line (Note14)	3,262
Sale of mutual funds	823	890
Other, net	(4,401)	(5,790)
Net Cash Used In Investing Activities	(95,777)	(67,313)
Cash Flows From Financing Activities
Term loan	100,000
Revolving debt and bank overdrafts, net	(23,656)	2,964
Other debt repayments	(7,228)	(6,322)
Dividends paid	(12,067)	(11,381)
Company stock repurchased	(2,000)	(6,589)
Stock option exercises	431	1,563
Excess tax benefit from stock options and awards	260	621
Other, net	(673)	(433)
Net Cash Provided By (Used In) Financing Activities	55,067	(19,577)
Effect of Exchange Rate Changes on Cash	(7,589)	(2,646)
Net Increase (Decrease) in Cash and Cash Equivalents	75,242	(44,640)
Cash and Cash Equivalents at Beginning of Period	85,215	133,347
Cash and Cash Equivalents at End of Period	160,457	88,707
Supplemental Cash Flow Information
Cash payments of income taxes, net of refunds	12,560	19,402
Cash payments of interest	$ 6,381	$ 6,763