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Fair Value of Financial Instruments - Nonrecurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Apr. 27, 2014	Jan. 26, 2014
Equipment [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value on a nonrecurring basis	$ 890us-gaap_AssetsFairValueDisclosureNonrecurring / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_EquipmentMember	$ 890us-gaap_AssetsFairValueDisclosureNonrecurring / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_EquipmentMember
Non-compete Agreement [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value on a nonrecurring basis	882us-gaap_AssetsFairValueDisclosureNonrecurring / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember	882us-gaap_AssetsFairValueDisclosureNonrecurring / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember
Customer Relationships [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value on a nonrecurring basis	868us-gaap_AssetsFairValueDisclosureNonrecurring / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember	868us-gaap_AssetsFairValueDisclosureNonrecurring / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember
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	890us-gaap_AssetsFairValueDisclosureNonrecurring / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_EquipmentMember	890us-gaap_AssetsFairValueDisclosureNonrecurring / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_EquipmentMember
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	882us-gaap_AssetsFairValueDisclosureNonrecurring / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember	882us-gaap_AssetsFairValueDisclosureNonrecurring / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember
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	$ 868us-gaap_AssetsFairValueDisclosureNonrecurring / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember	$ 868us-gaap_AssetsFairValueDisclosureNonrecurring / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember

X

- 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

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X

- Details

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X

- Details

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- Details

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X

- Details

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X

- Details

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