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Income Taxes (Details 4) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2012	Aug. 31, 2011
Reconciliation of the Gross Unrecognized Tax Benefits
Unrecognized tax benefits - beginning of fiscal year	$ 1,374	$ 3,600
Gross increases - tax positions in prior periods	7	90
Gross decreases - tax positions in prior periods	(67)	0
Gross increases - current period tax positions	422	202
Gross decreases - current period tax positions	0	(2,105)
Expirations of statute of limitations for assessment	(406)	(291)
Settlements	(307)	(122)
Unrecognized tax benefits - end of fiscal year	$ 1,023	$ 1,374

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