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Income Taxes - Net Operating Loss Carryforwards and Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands | Aug. 31, 2016 | Aug. 31, 2015
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Operating Loss Carryforwards [Line Items] |  |
Total unused net operating loss carryforwards | $ 221,567 |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |
Unrecognized tax benefits | 0 | $ 0
U.S. Federal |  |
Operating Loss Carryforwards [Line Items] |  |
Operating Loss Carryforwards | 11,578 |
Foreign |  |
Operating Loss Carryforwards [Line Items] |  |
Operating Loss Carryforwards | 107,540 |
Net operating loss carryforwards (expiring over the next 5 years) | 8,018 |
Net operating loss carryforwards (expiring in more than 5 years) | $ 94,431 |

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