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Income Taxes (Details 2)	12 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Federal statutory rate	35.00%	35.00%	35.00%
State income taxes, net of federal income tax benefit	1.10%	1.20%	1.70%
Foreign	(1.80%)	(1.90%)	(0.40%)
Compensation and fringe benefits	0.10%		0.20%
Other differences	0.60%	0.20%	0.40%
Effective tax rate	35.00%	34.50%	36.90%

X

- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.

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