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Gross Carrying Amount and Accumulated Amortization of Other Intangible Assets (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Nov. 30, 2017 | Aug. 31, 2017
Indefinite And Finite Lived Intangible Assets [Line Items] |  |
Accumulated Amortization | $ 198,686 | $ 192,660
Gross Carrying Value | 414,718 | 413,149
Net Book Value | 216,032 | 220,489
Tradenames |  |
Indefinite And Finite Lived Intangible Assets [Line Items] |  |
Accumulated Amortization | 0 | 0
Net Book Value | 91,825 | 91,080
Gross Carrying Value | $ 91,825 | 91,080
Customer relationships |  |
Indefinite And Finite Lived Intangible Assets [Line Items] |  |
Weighted Average Amortization Period (Years) | 15 years |
Gross Carrying Value | $ 264,409 | 263,498
Accumulated Amortization | 158,245 | 153,003
Net Book Value | $ 106,164 | 110,495
Patents |  |
Indefinite And Finite Lived Intangible Assets [Line Items] |  |
Weighted Average Amortization Period (Years) | 10 years |
Gross Carrying Value | $ 30,448 | 30,401
Accumulated Amortization | 24,476 | 24,027
Net Book Value | $ 5,972 | 6,374
Trademarks and tradenames |  |
Indefinite And Finite Lived Intangible Assets [Line Items] |  |
Weighted Average Amortization Period (Years) | 18 years |
Gross Carrying Value | $ 21,324 | 21,498
Accumulated Amortization | 9,637 | 9,396
Net Book Value | $ 11,687 | 12,102
Other intangibles |  |
Indefinite And Finite Lived Intangible Assets [Line Items] |  |
Weighted Average Amortization Period (Years) | 3 years |
Gross Carrying Value | $ 6,712 | 6,672
Accumulated Amortization | 6,328 | 6,234
Net Book Value | $ 384 | $ 438

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + 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)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + 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)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + 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)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit. + 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 (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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