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Fair Value of Financial Instruments - Nonrecurring Basis (Detail) (USD $) In Thousands, unless otherwise specified | Apr. 27, 2014 | Jul. 28, 2013
--- | --- | ---
Equipment [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Assets measured at fair value on a nonrecurring basis | $ 890 | $ 890
Non-compete Agreement [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Assets measured at fair value on a nonrecurring basis | 882 | 882
Customer Relationships [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Assets measured at fair value on a nonrecurring basis | 868 | 868
Significant other observable inputs - Level 2 [Member] | Equipment [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Assets measured at fair value on a nonrecurring basis | 890 | 890
Significant unobservable inputs - Level 3 [Member] | Non-compete Agreement [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Assets measured at fair value on a nonrecurring basis | 882 | 882
Significant unobservable inputs - Level 3 [Member] | Customer Relationships [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Assets measured at fair value on a nonrecurring basis | $ 868 | $ 868

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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
Name: | us-gaap_AssetsFairValueDisclosureNonrecurring
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_FairValueInputsAssetsQuantitativeInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration