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Inventories (Schedule of Inventories) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025 | Dec. 31, 2025
Inventories: |  |  |  |  |
Raw materials and supplies | $ 81,683 |  | $ 81,683 |  | $ 76,115
Work in process | 119,451 |  | 119,451 |  | 116,933
Finished goods | 36,130 |  | 36,130 |  | 31,644
Total | 237,264 |  | 237,264 |  | $ 224,692
Lower of cost or market inventory valuation adjustment | $ 2,521 | $ 1,893 | $ 7,779 | $ 4,676 |

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- Definition Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(6)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480657/210-10-S50-3 + Details
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