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Goodwill and Other Intangible Assets - Additional Information(Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Feb. 29, 2016 | Feb. 28, 2015 | Feb. 29, 2016 | Aug. 31, 2016 | Aug. 31, 2015 | Aug. 31, 2014
Goodwill [Line Items] |  |  |  |  |  |
Impairment charge |  |  | $ 186,511 | $ 186,511 | $ 84,353 | $ 0
Goodwill, Impairment Charge | $ 118,462 | $ 78,530 | 118,122 |  |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) |  |  | 16,653 |  |  |
Impairment of Intangible Assets, Finite-lived |  |  | 27,952 |  |  |
Tangible Asset Impairment Charges |  |  |  | 23,784 |  |
Future amortization expense, 2017 |  |  |  | 20,200 |  |
Future amortization expense, 2018 |  |  |  | 19,900 |  |
Future amortization expense, 2019 |  |  |  | 19,700 |  |
Future amortization expense, 2020 |  |  |  | 19,000 |  |
Future amortization expense, 2021 |  |  |  | 17,900 |  |
Future amortization expense, thereafter |  |  |  | 51,900 |  |
maximatecc |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Impairment charge |  |  | 45,674 |  |  |
Goodwill, Impairment Charge |  |  | 44,521 |  |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) |  |  | 1,153 |  |  |
Impairment of Intangible Assets, Finite-lived |  |  | 0 |  |  |
Tangible Asset Impairment Charges |  |  |  | 0 |  |
Viking |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Impairment charge |  |  | 104,124 |  |  |
Goodwill, Impairment Charge |  |  | 39,099 |  |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) |  |  | 13,289 |  |  |
Impairment of Intangible Assets, Finite-lived |  |  | 27,952 |  |  |
Tangible Asset Impairment Charges |  |  |  | 23,784 |  |
Cortland |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Impairment charge |  |  | 36,713 |  |  |
Goodwill, Impairment Charge |  |  | 34,502 |  |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) |  |  | 2,211 |  |  |
Impairment of Intangible Assets, Finite-lived |  |  | $ 0 |  |  |
Tangible Asset Impairment Charges |  |  |  | 0 |  |
Energy |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Impairment charge |  |  |  | $ 140,938 | 84,353 |
Goodwill, Impairment Charge | $ 73,919 | $ 78,530 |  |  | 78,530 |
Energy | Trade Names |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) |  |  |  |  | $ 6,400 |

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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=51824106&loc=d3e2420-110228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + 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)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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