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Inventories (Tables)
6 Months Ended
Jun. 30, 2023
Inventory Disclosure [Abstract]  
Schedule Of Inventories
Inventories are comprised of the following: 
June 30, 2023December 31, 2022
 (Dollars in thousands)
Inventories:
Raw materials and supplies$185,706 $216,761 
Work in process204,771 192,821 
Finished goods42,630 38,159 
         Total$433,107 $447,741