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Fair Value Measurements (Narrative) (Details) (USD $)
Nov. 30, 2012
Aug. 31, 2012
Nov. 30, 2011
Fair Value Measurements [Abstract]      
Carrying amount of long-term debt (including current portion) $ 3,214,000 $ 4,285,000 $ 7,500,000
Fair value of the long-term portion $ 3,200,000 $ 4,300,000 $ 7,400,000