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Supplementary Balance Sheet Detail (Schedule Of Amounts Recognized In Balance Sheet) (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
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Balance Sheet Related Disclosures [Abstract] |  |
Raw materials and supplies | $ 78,386 | $ 109,084
Work in process | 122,590 | 186,473
Finished goods | 30,265 | 34,589
Inventories | 231,241 | 330,146
Prepaid expenses | 11,258 | 11,176
Value-added tax and other indirect taxes receivable | 21,922 | 28,629
Spare parts inventory | 14,189 | 15,242
Other current assets | 8,363 | 11,335
Prepaid Expense and Other Assets, Current | 55,732 | 66,382
Land and improvements | 49,212 | 49,962
Buildings | 85,871 | 87,820
Machinery and equipment and other | 731,783 | 717,002
Construction in progress | 43,381 | 65,660
Property, plant and equipment | 910,247 | 920,444
Payrolls (including incentive programs) | 9,979 | 22,369
Employee benefits | 6,074 | 7,018
Deferred Revenue | 11,223 | 31,583
Other | 28,156 | 30,732
Accrued liabilities, net | 55,432 | 91,702
Post-employment benefits | 10,969 | 12,613
Pension and related benefits | 21,919 | 26,068
Other | 15,671 | 16,964
Other long - term obligations | $ 48,559 | $ 55,645

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