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Fair Value (Tables)
6 Months Ended
Jun. 30, 2013
Fair Value Disclosures [Abstract]  
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]
Major categories of assets and liabilities measured at fair value at June 30, 2013 and December 31, 2012 are classified as follows:
 
 
 
 
June 30, 2013
 
December 31, 2012
 
 
 
Level 1
 
Level 2
 
Level 3
 
Level 1
 
Level 2
 
Level 3
 
Assets:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Inventories
 
$
105,547
 
 
 
 
 
 
 
$
124,274
 
 
 
 
 
 
 
Aluminum futures contracts
 
 
3,332
 
 
 
 
 
 
 
 
-
 
 
 
 
 
 
 
Foreign currency forward contracts
 
 
875
 
 
 
 
 
 
 
 
-
 
 
 
 
 
 
 
Liabilities:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Foreign currency forward contracts
 
 
-
 
 
 
 
 
 
 
 
27
 
 
 
 
 
 
 
Interest rate swap contracts
 
 
 
 
$
80
 
 
 
 
 
 
 
$
111
 
 
 
 
Aluminum futures contracts
 
 
-
 
 
 
 
 
 
 
 
842
 
 
 
 
 
 
 
Embedded conversion option
 
 
 
 
 
 
 
$
4,163
 
 
 
 
 
 
 
$
1,996