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Other Assets - Schedule of Other Assets (Details) - USD ($) $ in Thousands | Aug. 31, 2017 | Aug. 31, 2016 | Aug. 31, 2015 | Aug. 31, 2014
--- | --- | --- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Goodwill | $ 154,055 | $ 160,414 | $ 150,115 |
Customer lists, trademarks and other intangible assets | 33,330 | 44,766 |  |
Notes receivable | 51,596 | 358,096 |  |
Deferred purchase price receivable | 345,655 | 0 |  |
Long-term derivative assets | 196,913 | 0 |  |
Prepaid pension and other benefits | 122,433 | 120,693 |  |
Capitalized major maintenance | 105,006 | 169,054 | $ 241,588 | $ 67,643
Cash Surrender Value of Life Insurance | 118,677 | 112,193 |  |
Other | 124,137 | 127,440 |  |
Other assets | 1,251,802 | 1,092,656 |  |
Customer lists |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Customer lists, trademarks and other intangible assets | $ 33,330 | $ 44,766 |  |

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