Derivative Financial Instruments and Hedging Activities - Schedule of Derivative Instruments in Statement of Financial Position, Fair Value (Details) - USD ($) $ in Thousands	Nov. 30, 2018	Aug. 31, 2018
Derivative [Line Items]
Derivative Assets	$ 212,335	$ 352,029
Derivative Liabilities	286,370	445,755
Designated as Hedging Instrument \| Interest rate swap derivatives
Derivative [Line Items]
Derivative Liabilities	10,407	9,452
Designated as Hedging Instrument \| Derivative Liabilities Current [Member] \| Interest rate swap derivatives
Derivative [Line Items]
Derivative Liabilities	687	771
Designated as Hedging Instrument \| Other Liabilities \| Interest rate swap derivatives
Derivative [Line Items]
Derivative Liabilities	$ 9,720	$ 8,681

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4D
-Subparagraph (c)(2)
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (a),(c)
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313

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