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v3.20.2

OTHER ACCRUED LIABILITIES - Narrative (Details) | 9 Months Ended
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Sep. 30, 2020
Minimum |
Accrued Liabilities [Line Items] |
Warranty coverage period | 1 year
Maximum |
Accrued Liabilities [Line Items] |
Warranty coverage period | 5 years
DuraPlate Trailer Panels |
Accrued Liabilities [Line Items] |
Warranty coverage period | 10 years

X
- References No definition available. + Details
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Namespace Prefix: | wnc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Standard Product Warranty, Coverage Period + References No definition available. + Details
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Namespace Prefix: | wnc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=wnc_DuraPlateTrailerPanelsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |