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Acquisitions (Narrative) (Details)	12 Months Ended
	Apr. 30, 2013 Y store
Acquisitions [Abstract]
Number of stores acquired	34
Number of stores opened	26
Number of stores closed	6
Number of stores expected to open in next fiscal year	2
Goodwill deductible for income tax purposes, period (years)	15

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- Definition

Goodwill Deductible For Income Tax Purposes, Period

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- Definition

Total number of stoes acquired through a variety of single and multi-store transactions.

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- Definition

Number of stores closed

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- Definition

Number of stores expected to open in next fiscal year

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- Definition

Number of stores opened in the period

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