Note 6 - Other Comprehensive (Loss) Income and Accumulated Other Comprehensive Loss (Details) - Components of Other Comprehensive Income (Loss) and Amounts Reclassified Out of Accumulated Other Comprehensive Loss - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014
Components of Other Comprehensive Income (Loss) and Amounts Reclassified Out of Accumulated Other Comprehensive Loss [Abstract]
Foreign currency translation adjustments		$ (4,187)	$ 545	$ (25,753)	$ 12,199
Foreign currency translation adjustments		(4,187)	545	(25,753)	12,199
Realized loss on cash flow hedges reclassified to earnings (1)	[1]	277	59	468	316
Realized loss on cash flow hedges reclassified to earnings (1)	[1]	174	37	294	199
Unrealized (loss) gain on cash flow hedges recognized in accumulated other comprehensive loss		(1,903)	3,673	(929)	8,661
Unrealized (loss) gain on cash flow hedges recognized in accumulated other comprehensive loss		(1,194)	2,304	(583)	5,426
Other comprehensive (loss) income		(5,813)	4,277	(26,214)	21,176
Other comprehensive (loss) income		$ (5,207)	$ 2,886	$ (26,042)	$ 17,824

[1] Reclassified to Selling, General and Administrative Expenses