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Estimated Future Amortization Expense (Detail) (USD $)
In Thousands, unless otherwise specified
Aug. 31, 2013
Goodwill And Intangible Assets Disclosure [Abstract]  
2014 $ 24,883
2015 21,740
2016 18,491
2017 16,986
2018 16,986
Thereafter 82,954
Total $ 182,040