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Inventories (Tables)
3 Months Ended
Mar. 31, 2017
Inventory Disclosure [Abstract]  
Schedule Of Inventories
nventories are comprised of the following: 
 
As of
December 31, 2016
 
As of
March 31, 2017
 
(Dollars in thousands)
Inventories:
 
 
 
Raw materials and supplies
$
54,469

 
$
51,037

Work in process
52,379

 
60,979

Finished goods
49,263

 
47,377

         Total
$
156,111

 
$
159,393