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Income Taxes (Details)	3 Months Ended	12 Months Ended
Income Taxes (Details)	Jul. 31, 2011	Apr. 30, 2012
Income Taxes (Textuals) [Abstract]
Effective rate	34.00%
Expected Tax Rate On Ordinary Income		33.10%

- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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