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Goodwill and Other Intangible Assets (Tables) | 6 Months Ended
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Feb. 28, 2017
Finite-Lived Intangible Assets [Line Items] |
Schedule of Goodwill [Table Text Block] |
| Energy |  | Ag |  | Corporate and Other |  | Total
| (Dollars in thousands)
Balances, August 31, 2016 | $ | 552 |  |  | $ | 148,916 |  |  | $ | 10,946 |  |  | $ | 160,414 |
Effect of foreign currency translation adjustments | — |  |  | (284 | ) |  | — |  |  | (284 | )
Other | — |  |  | — |  |  | (372 | ) |  | (372 | )
Balances, February 28, 2017 | $ | 552 |  |  | $ | 148,632 |  |  | $ | 10,574 |  |  | $ | 159,758 |
Schedule of Intangible Assets and Goodwill [Table Text Block] |
| February 28, 2017 |  | August 31, 2016
| Carrying Amount |  | Accumulated Amortization |  | Net |  | Carrying Amount |  | Accumulated Amortization |  | Net
| (Dollars in thousands)
Customer lists | $ | 49,379 |  |  | $ | (13,899 | ) |  | $ | 35,480 |  |  | $ | 51,554 |  |  | $ | (15,550 | ) |  | $ | 36,004 |
Trademarks and other intangible assets | 31,569 |  |  | (24,015 | ) |  | 7,554 |  |  | 35,015 |  |  | (26,253 | ) |  | 8,762 |
Total intangible assets | $ | 80,948 |  |  | $ | (37,914 | ) |  | $ | 43,034 |  |  | $ | 86,569 |  |  | $ | (41,803 | ) |  | $ | 44,766 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense |
| (Dollars in thousands)
Year 1 | $ | 3,991 |
Year 2 | 3,989 |
Year 3 | 3,810 |
Year 4 | 3,526 |
Year 5 | 3,423 |

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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 goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + 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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