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Inventories
9 Months Ended
Sep. 30, 2021
Inventory Disclosure [Abstract]  
Inventories Inventories
Inventories, which are valued at the lower of cost or net realizable value, consisted of the following:
(Dollars in thousands)September 30, 2021December 31, 2020
Raw materials$56,406 $44,976 
Work-in-process28,247 25,291 
Finished goods33,563 32,093 
Total inventories$118,216 $102,360