EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Calculation of basic and diluted earnings per share:
Antidilutive shares	597,749		977,352
Net loss	$ 2,593	$ (35,204)	$ (20,177)	$ (289,235)
Less: Net (income) loss attributable to noncontrolling interests	(1,369)	273	13,013	3,876
Net income (loss) attributable to Select Energy Services, Inc.	1,224		(7,164)	(285,359)
Predecessor
Calculation of basic and diluted earnings per share:
Less: Net (income) loss attributable to noncontrolling interests		$ 34,931		$ 285,359
Class A-1 common stock
Calculation of basic and diluted earnings per share:
Net income (loss) attributable to Select Energy Services, Inc.			$ (2,679)
Weighted average shares outstanding, basic			9,671,795
Net income (loss) per share attributable to common stockholders, basis			$ (0.28)
Weighted average shares outstanding, diluted			9,671,795
Net income (loss) per share attributable to common stockholders, diluted			$ (0.28)
Class A common stock
Calculation of basic and diluted earnings per share:
Net income (loss) attributable to Select Energy Services, Inc.	$ 1,224		$ (4,485)
Weighted average shares outstanding, basic	30,336,923		16,189,997
Net income (loss) per share attributable to common stockholders, basis	$ 0.04		$ (0.28)
Weighted average shares outstanding, diluted	30,357,572		16,189,997
Net income (loss) per share attributable to common stockholders, diluted	$ 0.04		$ (0.28)
Class B common stock
Calculation of basic and diluted earnings per share:
Weighted average shares outstanding, basic	38,462,541		38,462,541
Weighted average shares outstanding, diluted	38,462,541		38,462,541