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Inventories
12 Months Ended
Dec. 31, 2012
Inventory, Net [Abstract]  
Inventories [Text Block]
4. Inventories, net

 
December 31, 2012
 
December 31, 2011
Raw materials
$
386,119

 
$
340,556

Work in progress
182,060

 
158,825

Finished goods
360,168

 
289,771

Subtotal
928,347

 
789,152

Less LIFO reserve
(55,506
)
 
(55,345
)
Total
$
872,841

 
$
733,807



At December 31, 2012 and 2011, approximately 28% and 31%, respectively, of the Company's total inventories were accounted for using the LIFO method.