CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenue
Water solutions	$ 125,086	$ 60,975	$ 311,275	$ 173,157
Accommodations and rentals	15,615	5,838	38,457	19,585
Wellsite completion and construction services	13,179	7,094	38,522	22,923
Total revenue	153,880	73,907	388,254	215,665
Costs of revenue
Water solutions	88,087	49,996	226,737	144,653
Accommodations and rentals	11,976	4,969	30,697	15,527
Wellsite completion and construction services	10,888	6,299	32,155	19,817
Depreciation and amortization	23,420	21,613	67,144	73,874
Total costs of revenue	134,371	82,877	356,733	253,871
Gross profit (loss)	19,509	(8,970)	31,521	(38,206)
Operating expenses
Selling, general and administrative	16,087	8,764	49,298	25,928
Depreciation and amortization	375	363	1,312	1,644
Impairment of goodwill and other intangible assets				138,666
Impairment of property and equipment				60,026
Lease abandonment costs	590	13,169	2,871	13,169
Total operating expenses	17,052	22,296	53,481	239,433
Income (Loss) from operations	2,457	(31,266)	(21,960)	(277,639)
Other income (expense)
Interest expense, net	(484)	(4,343)	(1,885)	(11,792)
Other income (expense), net	326	431	3,342	588
Income (loss) before tax expense	2,299	(35,178)	(20,503)	(288,843)
Tax expense	294	(26)	326	(392)
Net income (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
Other income (expense)
Less: Net (income) loss attributable to noncontrolling interests		$ 34,931		$ 285,359
Class A-1 common stock
Other income (expense)
Net income (loss) attributable to Select Energy Services, Inc.			$ (2,679)
EARNINGS PER SHARE
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
Other income (expense)
Net income (loss) attributable to Select Energy Services, Inc.	$ 1,224		$ (4,485)
EARNINGS PER SHARE
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
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