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Derivative Instruments and Hedging Activities - Narrative (Details) $ in Thousands, $ in Millions | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Aug. 31, 2019 USD ($) | Aug. 31, 2019 CAD ($) | Aug. 25, 2018 USD ($) | Jun. 30, 2018 CAD ($) contract | Jan. 31, 2015 CAD ($) contract
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |
Amount reclassified from accumulated other comprehensive loss | $ (33,688) |  | $ (25,159) |  |
Canadian Dollars |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |
Average exchange rate |  |  |  | 0.7814 | 0.7825
Forward Contracts |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |
Notional value (CAD) |  | $ 9.5 |  | $ 12.1 | $ 31.0
Amount reclassified from accumulated other comprehensive loss | 200 |  |  |  |
Reclassification from accumulated other comprehensive loss to revenue | 200 |  |  |  |
Forward Contracts | Other Long-Term Assets |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |
Fair value of the contracts | 100 |  |  |  |
Forward Contracts | Prepaid Expenses and Other Current Assets |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |
Fair value of the contracts | $ 100 |  |  |  |
Forward Contracts | Canadian Dollars |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |
Number of derivatives entered into to exchange Canadian dollars for U.S. dollars | contract |  |  |  | 12 | 16

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e637-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e681-108580 + Details
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