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Gross Carrying Value and Accumulated Amortization of Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Aug. 31, 2019 | Aug. 31, 2018
Indefinite And Finite Lived Intangible Assets [Line Items] |  |
Intangible assets, gross | $ 169,224 | $ 175,240
Finite-Lived Accumulated Amortization | 116,849 | 103,583
Net Book Value | 52,375 | 71,657
Trade Names |  |
Indefinite And Finite Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | 20,420 | 24,138
Finite-Lived Accumulated Amortization | 0 | 0
Net Book Value | 20,420 | 24,138
Customer Relationships |  |
Indefinite And Finite Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | 126,229 | 128,561
Finite-Lived Accumulated Amortization | 96,817 | 84,029
Net Book Value | $ 29,412 | 44,532
Weighted Average Amortization Period | 14 years |
Patents |  |
Indefinite And Finite Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | $ 13,227 | 13,324
Finite-Lived Accumulated Amortization | 12,276 | 11,915
Net Book Value | $ 951 | 1,409
Weighted Average Amortization Period | 12 years |
Trademarks and Tradenames |  |
Indefinite And Finite Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | $ 4,513 | 4,275
Finite-Lived Accumulated Amortization | 2,921 | 2,826
Net Book Value | $ 1,592 | 1,449
Weighted Average Amortization Period | 16 years |
Non-Compete Agreements and Other |  |
Indefinite And Finite Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | $ 4,835 | 4,942
Finite-Lived Accumulated Amortization | 4,835 | 4,813
Net Book Value | $ 0 | $ 129
Weighted Average Amortization Period | 3 years |

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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://fasb.org/us-gaap/role/ref/legacyRef -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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