Notes Payable and Long-Term Debt - Schedule of Long-Term Debt Payable (Details) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2014
Debt Disclosure [Abstract]
Long-term Debt, Repayments in 2015	$ 156,836
Long-term Debt, Repayments in 2016	139,326
Long-term Debt, Repayments in 2017	149,852
Long-term Debt, Repayments in 2018	162,119
Long-term Debt, Repayments in 2019	150,622
Long-term Debt, Repayments after 2019	693,545
Total long-term debt	$ 1,452,300

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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