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Inventories (Tables)
6 Months Ended
Jun. 30, 2019
Inventory Disclosure [Abstract]  
Schedule Of Inventories
Inventories are comprised of the following: 
 
As of
June 30, 2019
 
As of
December 31, 2018
 
(Dollars in thousands)
Inventories:
 
 
 
Raw materials
$
99,241

 
$
99,935

Work in process
145,821

 
125,767

Finished goods
69,811

 
68,015

         Total
$
314,873

 
$
293,717