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Share Repurchases (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Aug. 31, 2015 | Aug. 31, 2014 | Jul. 22, 2015 | Jan. 03, 2014
Share Repurchases [Abstract] |  |  |  |
Repurchase authorization amount |  |  |  | $ 150,000
Increase in share repurchase authorization |  |  | $ 100,000 |
Number of shares of common stock repurchased during the period | 1,198,089 | 497,899 |  |
Aggregate purchase price of shares repurchased | $ 96,883 | $ 41,059 |  |
Remaining amount available under the repurchase program | $ 112,100 |  |  |

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