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Inventories
3 Months Ended
Mar. 31, 2015
Inventory Disclosure [Abstract]  
Inventories
Inventories
Inventories consist of the following components:
 
 
March 31,
2015
 
December 31,
2014
 
 
(dollars in thousands)
Finished goods
 
$
196,950

 
$
194,690

Work in process
 
30,010

 
30,790

Raw materials
 
74,480

 
69,150

Total inventories
 
$
301,440

 
$
294,630