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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Cash Flows From Operating Activities    
Net income $ 41,397 $ 136,319
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 78,315 69,958
Deferred compensation (856) (13,038)
Realized and unrealized (gains) losses on long-term investments (2,598) 8,073
Stock-based compensation 3,677 10,012
Deferred income taxes 12,636 (2,110)
Goodwill impairment (Note 18)   978
Other non-cash items 1,132 1,698
Changes in assets and liabilities:    
Receivables, net 25,838 (82,512)
Inventories 122,714 (100,101)
Other current assets (10,239) (5,030)
Accounts payable and accrued liabilities (152,096) 42,625
Pension liabilities (1,474) (1,685)
Environmental and legal liabilities (10,817) 10,264
Deferred revenues (1,730) (524)
Net Cash Provided By Operating Activities 105,899 74,927
Cash Flows From Investing Activities    
Expenditures for property, plant and equipment (213,597) (205,337)
Business acquisition, net of cash acquired (Note 17)   (9,693)
Other, net 1,669 3,156
Net Cash Used In Investing Activities (211,928) (211,874)
Cash Flows From Financing Activities    
Revolving debt and bank overdrafts, net (Note 14) 91,003 155,141
Other debt borrowings (Note 14)   75,000
Other debt repayments (28,572) (28,571)
Dividends paid (24,479) (22,458)
Company stock repurchased   (22,257)
Stock option exercises 2,386 353
Other, net (3,701) (2,650)
Net Cash Provided By Financing Activities 36,637 154,558
Effect of Exchange Rate Changes on Cash 1,150 (11,111)
Net Increase (Decrease) in Cash and Cash Equivalents (68,242) 6,500
Cash and Cash Equivalents at Beginning of Period 173,750 159,186
Cash and Cash Equivalents at End of Period 105,508 165,686
Supplemental Cash Flow Information    
Cash payments of income taxes, net of refunds 26,526 23,595
Cash payments of interest $ 20,929 $ 11,297