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Other Assets (Tables) | 12 Months Ended
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Aug. 31, 2017
Other Assets [Abstract] |
Schedule of Finite-Lived Intangible Assets [Table Text Block] | Intangible assets subject to amortization primarily include customer lists, trademarks and non-compete agreements, and are amortized over their respective useful lives (ranging from 2 to 30 years). Information regarding intangible assets included in other assets on our Consolidated Balance Sheets is as follows:
| August 31, 2017 |  | August 31, 2016
| Carrying Amount |  | Accumulated Amortization |  | Net |  | Carrying Amount |  | Accumulated Amortization |  | Net
| (Dollars in thousands)
Customer lists | $ | 46,180 |  |  | $ | (14,695 | ) |  | $ | 31,485 |  |  | $ | 51,554 |  |  | $ | (15,550 | ) |  | $ | 36,004 |
Trademarks and other intangible assets | 23,623 |  |  | (21,778 | ) |  | 1,845 |  |  | 35,015 |  |  | (26,253 | ) |  | 8,762 |
Total intangible assets | $ | 69,803 |  |  | $ | (36,473 | ) |  | $ | 33,330 |  |  | $ | 86,569 |  |  | $ | (41,803 | ) |  | $ | 44,766 |
Schedule of Other Assets | Other assets as of August 31, 2017, and 2016, are as follows:
| 2017 |  | 2016
| (Dollars in thousands)
Goodwill | $ | 154,055 |  |  | $ | 160,414 |
Customer lists, trademarks and other intangible assets | 33,330 |  |  | 44,766 |
Notes receivable | 51,596 |  |  | 358,096 |
Deferred purchase price receivable | 345,655 |  |  | — |
Long-term derivative assets | 196,913 |  |  | — |
Prepaid pension and other benefits | 122,433 |  |  | 120,693 |
Capitalized major maintenance | 105,006 |  |  | 169,054 |
Cash value life insurance | 118,677 |  |  | 112,193 |
Other | 124,137 |  |  | 127,440 |
| $ | 1,251,802 |  |  | $ | 1,092,656 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense | The estimated annual amortization expense related to intangible assets subject to amortization for the next five years is as follows:
| (Dollars in thousands)
Year 1 | $ | 3,396 |
Year 2 | 3,394 |
Year 3 | 3,152 |
Year 4 | 3,069 |
Year 5 | 2,828 |
Thereafter | 17,395 |
Total | $ | 33,234 |
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure | capitalized major maintenance costs is summarized below:
| Balance at Beginning of Year |  | Cost Deferred |  | Amortization |  | Balance at End of Year
| (Dollars in thousands)
2017 | $ | 169,054 |  |  | $ | 3,010 |  |  | $ | (67,058 | ) |  | $ | 105,006 |
2016 | 241,588 |  |  | 949 |  |  | (73,483 | ) |  | 169,054 |
2015 | 67,643 |  |  | 219,898 |  |  | (45,953 | ) |  | 241,588 |
Schedule of Goodwill [Table Text Block] | Changes in the net carrying amount of goodwill for the years ended August 31, 2017, and 2016, by segment, are as follows:
| Energy |  | Ag |  | Corporate and Other |  | Total
| (Dollars in thousands)
Balances, August 31, 2015 | $ | 552 |  |  | $ | 142,665 |  |  | $ | 6,898 |  |  | $ | 150,115 |
Goodwill acquired during the period | — |  |  | 5,726 |  |  | 4,048 |  |  | 9,774 |
Effect of foreign currency translation adjustments | — |  |  | 1,220 |  |  | — |  |  | 1,220 |
Goodwill disposed due to sale of business | — |  |  | (695 | ) |  | — |  |  | (695 | )
Balances, August 31, 2016 | $ | 552 |  |  | $ | 148,916 |  |  | $ | 10,946 |  |  | $ | 160,414 |
Effect of foreign currency translation adjustments | — |  |  | 121 |  |  | — |  |  | 121 |
Impairment | — |  |  | (5,542 | ) |  | — |  |  | (5,542 | )
Other | — |  |  | (566 | ) |  | (372 | ) |  | (938 | )
Balances, August 31, 2017 | $ | 552 |  |  | $ | 142,929 |  |  | $ | 10,574 |  |  | $ | 154,055 |

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- Definition Tabular disclosure of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer; the aggregate carrying amount of current assets, not separately presented elsewhere in the balance sheet; and other deferred costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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