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Post Closing Purchase Price (Detail) (USD $) In Thousands, unless otherwise specified	Feb. 04, 2013
Business Combination Allocation Of Purchase Price [Line Items]
Intangibles	$ 8,860us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
Beall Corporation
Business Combination Allocation Of Purchase Price [Line Items]
Current assets	1,035us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets / dei_LegalEntityAxis = wnc_BeallCorporationMember
Property, plant and equipment	2,714us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / dei_LegalEntityAxis = wnc_BeallCorporationMember
Intangibles	8,860us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / dei_LegalEntityAxis = wnc_BeallCorporationMember
Goodwill	1,784us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount / dei_LegalEntityAxis = wnc_BeallCorporationMember
Total assets	14,393us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets / dei_LegalEntityAxis = wnc_BeallCorporationMember
Current liabilities	(462)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities / dei_LegalEntityAxis = wnc_BeallCorporationMember
Total liabilities	(462)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities / dei_LegalEntityAxis = wnc_BeallCorporationMember
Acquisition	$ 13,931us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet / dei_LegalEntityAxis = wnc_BeallCorporationMember

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The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes.

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Amount of assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount of liabilities due within one year or within the normal operating cycle, if longer, assumed at the acquisition date.

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The amount of identifiable intangible assets recognized as of the acquisition date.

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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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