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Inventories
6 Months Ended
Jun. 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)June 30, 2021December 31, 2020
Raw materials$53,904 $44,976 
Work-in-process27,950 25,291 
Finished goods28,907 32,093 
Total inventories$110,761 $102,360