Financial Derivatives (Schedule of Derivative Instruments, Effect on Other Comprehensive Income) (Parenthetical) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Feb. 29, 2020	Feb. 28, 2019	Feb. 29, 2020	Feb. 28, 2019
Foreign Currency Forward Contracts [Member]
Derivatives, Fair Value [Line Items]
Tax (benefit) expense	$ (86)	$ 25	$ (60)	$ 186

Amount of income tax expense (benefit) from transactions on foreign currency derivatives that are designated as, and are effective as, economic hedges of a net investment in a foreign entity.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section 45
-Paragraph 20
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900

Name:	us-gaap_DerivativesUsedInNetInvestmentHedgeTaxExpenseBenefit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration