Note 6 - Other Comprehensive Income and Accumulated Other Comprehensive Loss (Details) - Components of Other Comprehensive Income and Amounts Reclassified out of Accumulated Other Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	May 31, 2014		May 31, 2013		May 31, 2014		May 31, 2013
Components of Other Comprehensive Income and Amounts Reclassified out of Accumulated Other Comprehensive Income [Abstract]
Foreign currency translation adjustments	$ 545		$ (2,478)		$ 12,199		$ (4,135)
Foreign currency translation adjustments	545		(2,478)		12,199		(4,135)
Realized loss on cash flow hedges reclassified to earnings (1)	59	[1]	160	[1]	316	[1]	557	[1]
Realized loss on cash flow hedges reclassified to earnings (1)	37	[1]	100	[1]	199	[1]	345	[1]
Unrealized gain (loss) on cash flow hedges recognized in accumulated other comprehensive loss	3,673		(1,037)		8,661		759
Unrealized gain (loss) on cash flow hedges recognized in accumulated other comprehensive loss	2,304		(649)		5,426		477
Other comprehensive income (loss)	4,277		(3,355)		21,176		(2,819)
Other comprehensive income (loss)	$ 2,886		$ (3,027)		$ 17,824		$ (3,313)

[1] Reclassified to Selling, General and Administrative Expenses