Note 5 - Derivatives in Cash Flow Hedging Relationships (Details) - Cash Flow Hedging [Member] - Designated as Hedging Instrument [Member] - Foreign Exchange Contract [Member] - Selling, General and Administrative Expenses [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 29, 2016	Feb. 28, 2015	Feb. 29, 2016	Feb. 28, 2015
Foreign currency forward contracts	$ (2,891)	$ 1,192	$ (3,496)	$ 974
Foreign currency forward contracts	$ (4)	$ (152)	$ 52	$ (191)