Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2021	Aug. 03, 2021
Document and Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2021
Document Transition Report	false
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
Title of 12(b) Security	Class A Common Stock
Trading Symbol	SOI
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Shell Company	false
Entity Central Index Key	0001697500
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Amendment Flag	false
Class A Common Stock
Document and Entity Information
Entity Common Stock, Shares Outstanding		31,862,999
Class B Common Stock
Document and Entity Information
Entity Common Stock, Shares Outstanding		13,818,517