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Supplementary Balance Sheet Detail (Tables)

12 Months Ended

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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Allowance For Doubtful Accounts Receivable Rollforward

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Tabular disclosure of the amounts that are recognized in the balance sheet (or statement of financial position) for pension plans and/or other employee benefit plans, showing separately the assets and current and noncurrent liabilities (if applicable) recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
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Tabular disclosure of supplier finance program.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 405
-SubTopic 50
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479468/405-50-50-3

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-Topic 405
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-Name Accounting Standards Codification
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