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Inventories | 3 Months Ended
--- | ---
Mar. 31, 2023
Inventory Disclosure [Abstract] |
Inventories | Inventories Inventories are comprised of the following:
| March 31, 2023 |  | December 31, 2022
| (Dollars in thousands)
Inventories: |  |  |
Raw materials and supplies | $ | 217,587 |  |  | $ | 216,761 |
Work in process | 206,732 |  |  | 192,821 |
Finished goods | 44,290 |  |  | 38,159 |
Total | $ | 468,609 |  |  | $ | 447,741 |

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI https://asc.fasb.org/topic&trid=2126998 + Details
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