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SEGMENTS - Narrative (Details) | 3 Months Ended
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Mar. 31, 2020 business_unit product_category segment
Segment Reporting Information [Line Items] |
Number of segments | segment | 3
Number of products | product_category | 4
Diversified Products |
Segment Reporting Information [Line Items] |
Number of strategic business units | business_unit | 3

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment. + References No definition available. + Details
Name: | us-gaap_NumberOfReportingUnits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Number Of Product Categories + References No definition available. + Details
Name: | wnc_NumberOfProductCategories
Namespace Prefix: | wnc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=wnc_DiversifiedProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |