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Inventories (Tables)
 12 Months Ended
Dec. 31, 2015
Inventory Disclosure [Abstract]  
Inventories
Inventories at December 31, 2015 and 2014 consist of the following:
 
2015
 
2014
 
(Dollars in thousands)
Raw materials
$
76,037

 
$
68,191

Work-in-process
60,218

 
58,526

Finished goods
230,536

 
242,750

 
366,791

 
369,467

Less: Inventory reserves
(36,516
)
 
(33,874
)
Inventories, net
$
330,275

 
$
335,593