Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash Flows From Operating Activities
Net income	$ 38,227	$ 37,376
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	32,859	32,482
Deferred compensation	8,150	(5,665)
Realized and unrealized gains on long-term investments	(642)	(555)
Stock-based compensation	3,162	770
Deferred income taxes	(1,953)	1,735
Other non-cash items	508	3,234
Changes in assets and liabilities:
Receivables, net	(679)	(39,083)
Inventories	(245)	(30,614)
Other current assets	(2,438)	1,288
Accounts payable and accrued liabilities	3,386	16,505
Pension liabilities	358	(970)
Environmental and legal liabilities	(1,408)	(510)
Deferred revenues	(781)	(366)
Excess tax benefit from stock options and awards	(236)	(580)
Net Cash Provided By Operating Activities	78,268	15,047
Cash Flows From Investing Activities
Expenditures for property, plant and equipment	(54,021)	(39,063)
Business acquisition (Note 16)	(5,133)
Proceeds from sale of product line (Note14)	3,262
Sale of mutual funds	823	890
Other, net	(2,569)	(4,277)
Net Cash Used In Investing Activities	(57,638)	(42,450)
Cash Flows From Financing Activities
Revolving debt and bank overdrafts, net	(9,435)	2,090
Other debt repayments	(2,503)	(1,371)
Dividends paid	(8,061)	(7,592)
Company stock repurchased		(4,924)
Stock option exercises	359	1,449
Excess tax benefit from stock options and awards	236	580
Other, net	(275)	(133)
Net Cash (Used In) Financing Activities	(19,679)	(9,901)
Effect of Exchange Rate Changes on Cash	(3,801)	405
Net Decrease in Cash and Cash Equivalents	(2,850)	(36,899)
Cash and Cash Equivalents at Beginning of Period	85,215	133,347
Cash and Cash Equivalents at End of Period	82,365	96,448
Supplemental Cash Flow Information
Cash payments of income taxes, net of refunds	6,873	16,753
Cash payments of interest	$ 6,046	$ 6,221