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Other Assets - Schedule of Goodwill (Details) - USD ($) |  |  | 12 Months Ended
--- | --- | --- | ---
Mar. 01, 2019 | Jul. 31, 2018 | Aug. 31, 2019
Goodwill [Roll Forward] |  |  |
Impairment |  | $ 0 |
Balances, end of period |  |  | $ 172,404,000
Corporate and Other |  |  |
Goodwill [Line Items] |  |  |
Goodwill, Foreign Currency Translation Gain (Loss) |  |  | 0
Goodwill [Roll Forward] |  |  |
Balances, beginning of period |  |  | 10,574,000
Balances, end of period |  |  | 10,574,000
Operating Segments |  |  |
Goodwill [Line Items] |  |  |
Goodwill, Acquired During Period |  |  | 61,358,000
Goodwill [Roll Forward] |  |  |
Balances, beginning of period |  |  | 138,464,000
Impairment |  |  | (27,418,000)
Balances, end of period |  |  | 172,404,000
Energy |  |  |
Goodwill [Line Items] |  |  |
Goodwill, Foreign Currency Translation Gain (Loss) |  |  | 0
Goodwill [Roll Forward] |  |  |
Balances, beginning of period |  |  | 552,000
Balances, end of period |  |  | 552,000
Ag |  |  |
Goodwill [Line Items] |  |  |
Goodwill, Acquired During Period |  |  | 61,358,000
Goodwill [Roll Forward] |  |  |
Balances, beginning of period |  |  | 127,338,000
Impairment |  |  | (27,418,000)
Balances, end of period |  |  | $ 161,278,000
West Central [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill, Acquired During Period | $ 61,358,000 |  |

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