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Fair Value Measurements (Fair Value Measurements on a Recurring Basis) (Details) - Fair Value, Recurring - USD ($) $ in Thousands | Nov. 30, 2019 | Aug. 31, 2019
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Level 1 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash equivalents | $ 47,257 | $ 27,804
Short-term investments | 16,350 | 14,088
Level 2 | Prepaid expenses and other current assets | Designated as Hedging Instruments | Foreign exchange contracts |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Forward foreign exchange contracts | 1,623 | 904
Level 2 | Prepaid expenses and other current assets | Not Designated as Hedging Instruments | Foreign exchange contracts |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Forward foreign exchange contracts | 14,240 | 6,878
Level 2 | Accrued expenses | Designated as Hedging Instruments | Foreign exchange contracts |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Liabilities | 3,357 | 15,999
Level 2 | Accrued expenses | Designated as Hedging Instruments | Interest rate swaps |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Liabilities | 4,319 | 5,918
Level 2 | Accrued expenses | Not Designated as Hedging Instruments | Foreign exchange contracts |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Liabilities | 13,154 | 55,391
Level 2 | Other liabilities | Designated as Hedging Instruments | Forward interest rate swaps |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Liabilities | 28,784 | 35,045
Level 3 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Senior Non-Convertible Preferred Stock | $ 25,200 | $ 33,102

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- Definition Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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