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Notes Payable and Long-Term Debt - Schedule of Interest, Net (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Nov. 30, 2013
Nov. 30, 2012
Debt Disclosure [Abstract]    
Interest expense $ 23,519 $ 24,436
Interest-purchase of NCRA noncontrolling interest 11,124 46,696
Interest Costs Capitalized (2,265) (2,902)
Interest income (1,593) (1,020)
Interest Income (Expense), Net $ 30,785 $ 67,210