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Allowance for Doubtful Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2012	Aug. 31, 2011	Aug. 31, 2010	Aug. 31, 2009
Allowance for Doubtful Accounts
Provision	$ 1,724	$ (1,495)	$ 6,647
Write-offs, net of recoveries	(1,007)	(3,396)	(2,848)
Translation effect	(1,002)	1,161	(873)
Balance	$ 9,190	$ 9,475	$ 13,205	$ 10,279

Amount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected).

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