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New Accounting Pronouncements (Details) - USD ($)	3 Months Ended
	Nov. 30, 2018	Nov. 30, 2017	Sep. 01, 2018	Aug. 31, 2018
ASU 2016-15
New Accounting Pronouncement, Early Adoption [Line Items]
Proceeds from corporate-owned life insurance policies	$ 600,000	$ 0
ASC 606
New Accounting Pronouncement, Early Adoption [Line Items]
ASC 606 adjustments			$ 13,000,000	$ 13,000,000

X

- Definition

Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

Amount of cash inflow for proceeds from settlement of corporate-owned life insurance policy, classified as investing activities. Includes, but is not limited to, bank-owned life insurance policy.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 21C
-URI http://asc.fasb.org/extlink&oid=109223946&loc=SL94080552-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585

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