Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Nov. 02, 2017
Entity Registrant Name	SOLARIS OILFIELD INFRASTRUCTURE, INC.
Entity Central Index Key	0001697500
Document Type	10-Q
Document Period End Date	Sep. 30, 2017
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q3
Class A Common Stock
Entity Common Stock, Shares Outstanding		11,316,438
Class B Common Stock
Entity Common Stock, Shares Outstanding		32,365,823