| Document and Entity Information | Feb. 21, 2022 |
| Document and Entity Information [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Feb. 21, 2022 |
| Entity File Number | 001-38090 |
| Entity Registrant Name | SOLARIS OILFIELD INFRASTRUCTURE, INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 81-5223109 |
| Entity Address, Address Line One | 9811 Katy Freeway, Suite 700 |
| Entity Address, City or Town | Houston |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 77024 |
| City Area Code | 281 |
| Local Phone Number | 501-3070 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A Common Stock, $0.01 par value |
| Trading Symbol | SOI |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | true |
| Entity Central Index Key | 0001697500 |
| Amendment Flag | false |
