Financial Derivatives (Schedule of Financial Derivatives) (Details) - USD ($) $ in Thousands	May 31, 2019	Aug. 31, 2018	May 31, 2018
Derivatives Designated As Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Total derivatives	$ 533	$ 775	$ 2,100
Derivatives Designated As Hedging Instruments [Member] \| Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	533	775	2,149
Derivatives Designated As Hedging Instruments [Member] \| Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	0	(49)
Derivatives Not Designated As Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Total derivatives	(21)	111	81
Derivatives Not Designated As Hedging Instruments [Member] \| Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	1	123	92
Derivatives Not Designated As Hedging Instruments [Member] \| Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ (22)	$ (12)	$ (11)

Fair value, after the effects of master netting arrangements, of a financial asset or other 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 assets not subject to a master netting arrangement and not elected to be offset.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 210
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- Definition

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

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- Definition

Fair value, after the 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 not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13433-108611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
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-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313

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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

No definition available.

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