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Inventories
 9 Months Ended
Sep. 30, 2016
Inventories  
Inventories

Note 4.  Inventories



Inventories are stated at lower of cost or market. Cost is determined using a weighted average cost method for scrap, and on a first-in, first-out, basis for other inventory. Inventory consisted of the following (in thousands):











 

 

 

 

 

 

 

 

 



 

 

 

 

 

 

 

 

 



 

 

September 30,

 

December 31,

 

 



 

 

2016

 

2015

 

 



 

Raw materials

$

 490,164 

 

$

 419,608 

 

 



 

Supplies

 

 392,433 

 

 

 396,349 

 

 



 

Work in progress

 

 124,428 

 

 

 90,486 

 

 



 

Finished goods

 

 268,550 

 

 

 242,947 

 

 



 

Total inventories

$

 1,275,575 

 

$

 1,149,390