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Earnings before Income Taxes, Including both Continuing and Discontinued Operations (Detail) - USD ($)
$ in Thousands
12 Months Ended
Aug. 31, 2015
Aug. 31, 2014
Aug. 31, 2013
Income Tax Disclosure [Abstract]      
Domestic $ 14,593 $ 84,854 $ 67,392
Foreign 10,798 89,172 95,557
Earnings from continuing operations before income tax expense $ 25,391 $ 174,026 $ 162,949