Goodwill (Changes In The Carrying Amount Of Goodwill By Segment) (Details) (USD $) In Thousands	12 Months Ended
Aug. 31, 2011	Aug. 31, 2010	Aug. 31, 2009
Goodwill [Line Items]
Goodwill impairment	$ 0	$ 0	$ 0
Beginning Balance	221,991	181,355
Goodwill acquired during the period	0	46,130
Foreign currency translations	6,274	(5,494)
Ending Balance	228,265	221,991	181,355
U.S. [Member]
Goodwill [Line Items]
Beginning Balance	145,826	99,696
Goodwill acquired during the period	0	46,130
Foreign currency translations	0	0
Ending Balance	145,826	145,826
Europe [Member]
Goodwill [Line Items]
Beginning Balance	72,278	78,140
Goodwill acquired during the period	0	0
Foreign currency translations	5,894	(5,862)
Ending Balance	78,172	72,278
Asia Pacific [Member]
Goodwill [Line Items]
Beginning Balance	3,887	3,519
Goodwill acquired during the period	0	0
Foreign currency translations	380	368
Ending Balance	$ 4,267	$ 3,887

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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+ Details

- Definition

Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

+ References

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+ Details