Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash Flows From Operating Activities
Net income	$ 47,020	$ 41,397
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	83,676	78,315
Deferred compensation	2,729	(856)
Realized and unrealized gains on long-term investments	(3,740)	(2,598)
Stock-based compensation	4,480	3,677
Deferred income taxes	(363)	12,636
Other non-cash items	1,756	1,132
Changes in assets and liabilities:
Receivables, net	(21,688)	25,838
Inventories	(39,003)	122,714
Other current assets	(5,995)	(10,239)
Accounts payable and accrued liabilities	27,455	(152,096)
Pension liabilities	(1,355)	(1,474)
Environmental and legal liabilities	818	(10,817)
Deferred revenues	(2,023)	(1,730)
Net Cash Provided By Operating Activities	93,767	105,899
Cash Flows From Investing Activities
Expenditures for property, plant and equipment	(86,572)	(213,597)
Other, net	5,831	1,669
Net Cash Used In Investing Activities	(80,741)	(211,928)
Cash Flows From Financing Activities
Revolving debt and bank overdrafts, net (Note 14)	83,004	91,003
Other debt repayments (Note 14)	(48,571)	(28,572)
Dividends paid	(25,289)	(24,479)
Stock option exercises	1,023	2,386
Other, net	(3,238)	(3,701)
Net Cash Provided By Financing Activities	6,929	36,637
Effect of Exchange Rate Changes on Cash	(2,498)	1,150
Net Increase (Decrease) in Cash and Cash Equivalents	17,457	(68,242)
Cash and Cash Equivalents at Beginning of Period	129,823	173,750
Cash and Cash Equivalents at End of Period	147,280	105,508
Supplemental Cash Flow Information
Cash payments of income taxes, net of refunds	8,482	26,526
Cash payments of interest	$ 21,513	$ 20,929