Equity - EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Numerator
Net income (loss) attributable to Solaris	$ (5,540)	$ 13,275	$ (24,623)	$ 25,592
Less income attributable to participating securities		(322)		(575)
Net income attributable to common stockholders	$ (5,540)	$ 12,953	$ (24,623)	$ 25,017
Class A Common Stock
Denominator
Weighted average number of unrestricted outstanding common shares used to calculate basic net income per share (in shares)	28,638	30,609	28,975	29,326
Effect of dilutive securities:
Stock options (in shares)		35		61
Diluted weighted-average shares of Class A common stock outstanding used to calculate diluted net income per share (in shares)	28,638	30,644	28,975	29,387
Earnings per share of Class A common stock - basic (in dollars per share)	$ (0.20)	$ 0.42	$ (0.85)	$ 0.85
Earnings per share of Class A common stock - diluted (in dollars per share)	$ (0.20)	$ 0.42	$ (0.85)	$ 0.85