| Document and Entity Information | Sep. 22, 2021 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0000879526 |
| Document Type | 8-K |
| Document Period End Date | Sep. 22, 2021 |
| Entity Registrant Name | WABASH NATIONAL CORPORATION |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-10883 |
| Entity Tax Identification Number | 52-1375208 |
| Entity Address, Address Line One | 3900 McCarty Lane |
| Entity Address, City or Town | Lafayette |
| Entity Address, State or Province | IN |
| Entity Address, Postal Zip Code | 47905 |
| City Area Code | (765) |
| Local Phone Number | 771-5310 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, $0.01 par value |
| Trading Symbol | WNC |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
