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Inventories (Tables)
6 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current
Inventories consist of the following components (dollars in thousands):
 
 
June 30,
2020
 
December 31,
2019
Finished goods
 
$
73,320

 
$
68,350

Work in process
 
30,670

 
30,560

Raw materials
 
36,900

 
33,750

Total inventories
 
$
140,890

 
$
132,660