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Long-Term Debt and Lines of Credit (Detail) (USD $) In Thousands, unless otherwise specified	Apr. 27, 2014	Apr. 28, 2013
Debt Disclosure [Abstract]
unsecured senior term notes	$ 4,400	$ 6,600
current maturities of long-term debt	(2,200)	(2,200)
long-term debt, less current maturities	$ 2,200	$ 4,400

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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-Publisher SEC

-Name Regulation S-X (SX)

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-Subparagraph (SX 210.5-02.22)

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-Number 210

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

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Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19,20)

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+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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