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Derivative Financial Instruments and Hedging Activities - Pretax Gains (Losses) Relating to Cash Flow Hedges Reclassified from AOCL into Income (Details) - USD ($) $ in Thousands | 12 Months Ended
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Aug. 31, 2021 | Aug. 31, 2020 | Aug. 31, 2019
Interest expense |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Interest rate derivatives | $ 21,262 | $ 23,807 | $ 11,497

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- Definition The amount of net gains or losses on interest rate cash flow hedges reclassified during the period to earnings from accumulated other comprehensive income upon the hedged transaction affecting earnings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959 + Details
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