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Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014
Acquired Finite And Indefinite Lived Intangible Assets By Major Class [Line Items] |
Intangible Assets Purchase Price Allocation | $ 162,800 wnc_IntangibleAssetsPurchasePriceAllocation
Trademarks and Trade Names [Member] |
Acquired Finite And Indefinite Lived Intangible Assets By Major Class [Line Items] |
Intangible Assets Purchase Price Allocation | 27,600 wnc_IntangibleAssetsPurchasePriceAllocation / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksAndTradeNamesMember
Acquired Finite lived Intangible Asset Weighted Average Useful Lives | 20 years
Technology-Based Intangible Assets [Member] |
Acquired Finite And Indefinite Lived Intangible Assets By Major Class [Line Items] |
Intangible Assets Purchase Price Allocation | 15,300 wnc_IntangibleAssetsPurchasePriceAllocation / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TechnologyBasedIntangibleAssetsMember
Acquired Finite lived Intangible Asset Weighted Average Useful Lives | 12 years
Customer Relationships [Member] |
Acquired Finite And Indefinite Lived Intangible Assets By Major Class [Line Items] |
Intangible Assets Purchase Price Allocation | 119,000 wnc_IntangibleAssetsPurchasePriceAllocation / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember
Acquired Finite lived Intangible Asset Weighted Average Useful Lives | 10 years
Order or Production Backlog [Member] |
Acquired Finite And Indefinite Lived Intangible Assets By Major Class [Line Items] |
Intangible Assets Purchase Price Allocation | $ 900 wnc_IntangibleAssetsPurchasePriceAllocation / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OrderOrProductionBacklogMember
Acquired Finite lived Intangible Asset Weighted Average Useful Lives | Less than 1 year

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