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Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jul. 27, 2013	Jul. 28, 2012
Income Taxes [Abstract]
Effective tax rate (in hundredths)	35.50%	37.00%
Liability for uncertain tax positions	$ 1.4
Liability for uncertain tax positions to be settled within 12 months	$ 0.2
Statutory rate (in hundredths)	35.00%

X

- 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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X

- Definition

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Name Statement of Financial Accounting Standard (FAS)

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- Definition

The current portion of the amount recognized for uncertain tax positions as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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-Publisher FASB

-Name FASB Interpretation (FIN)

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-Paragraph 6, 7, 8

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- Definition

The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.

+ References

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