| Document and Entity Information | Oct. 30, 2020 |
| Document and Entity Information [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Oct. 30, 2020 |
| Entity File Number | 001-37509 |
| Entity Registrant Name | DASEKE, INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 47-3913221 |
| Entity Address, Address Line One | 15455 Dallas Parkway, Suite 550 |
| Entity Address, City or Town | Addison |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 75001 |
| City Area Code | 972 |
| Local Phone Number | 248-0412 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.0001 per share |
| Trading Symbol | DSKE |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001642453 |
| Amendment Flag | false |
