Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

Derivatives Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Derivatives Narrative (Details) - USD ($) $ in Thousands	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2017	Feb. 29, 2016	Aug. 31, 2016
Derivative [Line Items]
Gain (Loss) on Foreign Currency Fair Value Hedge Derivatives and Not Designated as Hedging Instruments at Fair Value	$ (474)	$ 1,062	$ (1,966)	$ (634)
Fair Value Hedging [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 38,700		$ 38,700		$ 143,400