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Supplementary Balance Sheet Detail (Tables) | 12 Months Ended
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Dec. 31, 2024
Balance Sheet Related Disclosures [Abstract] |
Schedule Of Amounts Recognized In Balance Sheet | The following tables present supplementary balance sheet details:
| December 31, 2024 |  | December 31, 2023
| (Dollars in thousands)
Inventories: |  |  |
Raw materials and supplies | $ | 78,386 |  |  | $ | 109,084 |
Work in process | 122,590 |  |  | 186,473 |
Finished goods | 30,265 |  |  | 34,589 |
| $ | 231,241 |  |  | $ | 330,146 |
Prepaid expenses and other current assets: |  |  |
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 |
| $ | 55,732 |  |  | $ | 66,382 |
Property, plant and equipment: |  |  |
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 |
| $ | 910,247 |  |  | $ | 920,444 |
Other accrued liabilities: |  |  |
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 |
| $ | 55,432 |  |  | $ | 91,702 |
Other long-term obligations: |  |  |
Post-employment benefits | $ | 10,969 |  |  | $ | 12,613 |
Pension and related benefits | 21,919 |  |  | 26,068 |
Other | 15,671 |  |  | 16,964 |
| $ | 48,559 |  |  | $ | 55,645 |
Schedule Of Analysis Of The Allowance For Doubtful Accounts | The following table presents an analysis of the allowance for doubtful accounts for the years ended December 31:
| 2024 |  | 2023 |  | 2022
| (Dollars in thousands)
Balance at beginning of year | $ | 7,708 |  |  | $ | 8,019 |  |  | $ | 6,835 |
(Credit) charge to income | (660) |  |  | (439) |  |  | 1,585 |
Deductions | 66 |  |  | 128 |  |  | (401) |
Balance at end of year | $ | 7,114 |  |  | $ | 7,708 |  |  | $ | 8,019 |
Supplier Finance Program | See below for a rollforward of our SFP obligations.
| (Dollars in thousands)
Confirmed obligations outstanding as of December 31, 2022 | $ | — |
Invoices confirmed during the year | 24,368 |
Confirmed invoices paid during the year | (19,732) |
Confirmed obligations outstanding as of December 31, 2023 | $ | 4,636 |
Invoices confirmed during the year | 17,821 |
Confirmed invoices paid during the year | (16,871) |
Confirmed obligations outstanding as of December 31, 2024 | $ | 5,586 |

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