Note 6. Segment Information (Detail) - Schedule of Revenues From Countries That Are 10% Or More Of Revenues (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2012		Aug. 31, 2011		Aug. 31, 2010
Revenues*
Total revenues	$ 805,793	[1]	$ 726,510	[1]	$ 641,059	[1]
United States [Member]
Revenues*
Total revenues	550,474	[1]	497,564	[1]	435,351	[1]
United Kingdom [Member]
Revenues*
Total revenues	114,435	[1]	104,698	[1]	94,749	[1]
All other European Countries [Member]
Revenues*
Total revenues	82,969	[1]	73,995	[1]	66,900	[1]
Asia Pacific [Member]
Revenues*
Total revenues	$ 57,915	[1]	$ 50,253	[1]	$ 44,059	[1]

[1] Revenues are attributed to countries based on the location of the client.