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Inventories
9 Months Ended
Sep. 30, 2022
Inventory Disclosure [Abstract]  
Inventories Inventories
Inventories are comprised of the following: 
September 30, 2022
December 31, 2021
 (Dollars in thousands)
Inventories:
Raw materials and supplies$212,042 $132,113 
Work in process182,657 127,127 
Finished goods44,167 30,192 
         Total$438,866 $289,432