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Inventories (Tables)
3 Months Ended
Mar. 31, 2014
Inventory Disclosure [Abstract]  
Schedule Of Inventories
 
As of December 31, 2013
 
As of March 31, 2014
 
(Dollars in thousands)
Inventories:
 
 
 
Raw materials and supplies
$
184,420

 
$
174,255

Work in process
245,160

 
251,485

Finished goods
78,446

 
83,426

 
508,026

 
509,166

Reserves
(17,612
)
 
(17,891
)
         Total
$
490,414

 
$
491,275