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Derivative Financial Instruments (Details) - Schedule of Fair Values for Derivative Financial Instruments - USD ($)
$ in Thousands
Jul. 31, 2016
Jul. 31, 2015
Commodity Contract [Member]    
Derivative Financial Instruments (Details) - Schedule of Fair Values for Derivative Financial Instruments [Line Items]    
Asset Derivatives, Fair Value [1] $ 632 $ 448
Liability Derivatives, Fair Value [1]
Forward Contracts [Member]    
Derivative Financial Instruments (Details) - Schedule of Fair Values for Derivative Financial Instruments [Line Items]    
Asset Derivatives, Fair Value [2]
Liability Derivatives, Fair Value [2] $ 695 $ 469
[1] Commodity futures are included in other prepaid expense and other current assets. These futures contracts are for approximately 1.3 million and approximately 1.6 million bushels of corn at July 31, 2016 and 2015, respectively.
[2] Forward purchase contracts are included in accrued expenses and other current liabilities. These contracts are for purchases of approximately 0.9 million and approximately 1.1 million bushels of corn at July 31, 2016 and 2015, respectively.