Note 8 . Goodwill (Detail) - Changes in the carrying amount of goodwill by segment (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Feb. 29, 2012
Balance at August 31, 2011	$ 228,265
Balance at February 29, 2012	225,275
Goodwill acquired during the period	0
Foreign currency translations	(2,990)
United States [Member]
Balance at August 31, 2011	145,826
Balance at February 29, 2012	145,826
Goodwill acquired during the period	0
Foreign currency translations	0
Europe [Member]
Balance at August 31, 2011	78,172
Balance at February 29, 2012	75,417
Goodwill acquired during the period	0
Foreign currency translations	(2,755)
Asia Pacific [Member]
Balance at August 31, 2011	4,267
Balance at February 29, 2012	4,032
Goodwill acquired during the period	0
Foreign currency translations	$ (235)