CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands	Class A Common Stock	Class A-1 Common Stock	Class A-2 Common Stock	Class B Common Stock	Total Stockholders’ Equity	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests	Total
Beginning balance (Predecessor) at Dec. 31, 2015										$ 317,161
Beginning balance at Dec. 31, 2015								$ (7)	$ 10,621	$ 327,775
Beginning balance (in shares) (Predecessor) at Dec. 31, 2015										38,398,649
Member contributions | Predecessor										$ 23,519
Member contributions										$ 23,519
Member contributions (in shares) | Predecessor										3,866,864
Purchase of additional controlling interest | Predecessor										$ 707
Purchase of additional controlling interest									(1,055)	(348)
Noncontrolling interest in subsidiary									138	138
Equity-based compensation | Predecessor										317
Equity-based compensation										317
Net loss prior to 144A Offering | Predecessor										(306,481)
Net loss prior to 144A Offering									(4,407)	(310,888)
Reorganization and 144A Offering | Predecessor										(35,223)
Reorganization and 144A Offering	$ 38	$ 161		$ 385	$ 332,471	$ 331,887				$ 297,248
Reorganization and 144A Offering (in shares) | Predecessor										(42,265,513)
Reorganization and 144A Offering (in shares)	3,802,972	16,100,000		38,462,541
Initial allocation of noncontrolling interest of Select Energy Services, Inc. effective on date of 144A Offering					(218,712)	(218,712)			218,712
Net loss subsequent to reorganization and 144A Offering					(1,043)		$ (1,043)		(2,017)	$ (3,060)
Net loss | Predecessor										(306,481)
Net loss										(313,948)
Ending balance at Dec. 31, 2016	$ 38	$ 161		$ 385	112,716	113,175	(1,043)		221,992	334,708
Ending balance (in shares) at Dec. 31, 2016	3,802,972	16,100,000		38,462,541
Fair value of interest rate swap								7		7
Balance prior to reorganization and 144A Offering transactions | Predecessor										35,223
Balance prior to reorganization and 144A Offering transactions									5,297	$ 40,520
Balance prior to reorganization and 144A Offering transactions (in shares) | Predecessor										42,265,513
Balance subsequent to reorganization and 144A Offering transactions	$ 38	$ 161		$ 385	113,759	113,175			224,009	$ 337,768
Balance subsequent to reorganization and 144A Offering transactions (in shares)	3,802,972	16,100,000		38,462,541
Noncontrolling interest in subsidiary									(368)	(368)
Equity-based compensation					4,346	4,346			3,345	7,691
Conversion of Class A-1 to Class A	$ 161	$ (161)
Conversion of Class A-1 to Class A (in shares)	16,100,000	(16,100,000)
Exchange of shares of Class B common stock and SES Holdings, LLC common units for shares of Class A common stock	$ 25			$ (25)	16,298	16,298			(16,298)
Exchange of shares of Class B common stock and SES Holdings, LLC common units for shares of Class A common stock (in shares)	2,487,029			(2,487,029)
Issuance of shares for acquisition	$ 6				5,001	4,995			4,879	9,880
Issuance of shares for acquisition (in shares)	560,277
Issuance of shares for merger	$ 262		$ 67	$ 44	447,615	447,242			170,276	617,891
Issuance of shares for merger (in shares)	26,246,115		6,731,845	4,356,477
Issuance of shares for initial public offering	$ 100				87,369	87,269			41,135	128,504
Issuance of shares for initial public offering (in shares)	10,005,000
Treasury stock purchase					(184)	(184)			(113)	(297)
Treasury stock purchase ( in shares)	(19,217)
Foreign currency translation adjustment					302			302	185	487
Net loss					(16,816)		(16,816)		(18,311)	(35,127)
Ending balance at Dec. 31, 2017	$ 592		$ 67	$ 404	$ 656,647	$ 673,141	$ (17,859)	$ 302	$ 406,722	$ 1,063,369
Ending balance (in shares) at Dec. 31, 2017	59,182,176		6,731,845	40,331,989