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Notes Payable and Long-Term Debt - Schedule of Interest, Net (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Aug. 31, 2014
Aug. 31, 2013
Aug. 31, 2012
Debt Disclosure [Abstract]      
Interest expense $ 79,614 $ 99,271 $ 94,090
Interest-purchase of NCRA noncontrolling interest 70,843 149,087 113,184
Capitalized Interest (8,528) (10,579) (8,882)
Interest income (6,987) (6,212) (5,129)
Interest, net $ 134,942 $ 231,567 $ 193,263