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Inventories (Schedule Of Inventories) (Details) (USD $)
Jun. 30, 2013
Dec. 31, 2012
Inventory Disclosure [Abstract]    
Raw materials $ 74,712,375 $ 114,750,525
Work-in-process 20,821,296 24,588,734
Finished goods 20,468,299 20,591,007
Total Inventory $ 116,001,970 $ 159,930,266