BUSINESS AND BASIS OF PRESENTATION	12 Months Ended
Dec. 31, 2017
BUSINESS AND BASIS OF PRESENTATION
BUSINESS AND BASIS OF PRESENTATION	NOTE 1—BUSINESS AND BASIS OF PRESENTATION Description of the business: Select Energy Services, Inc. (“Select Inc.” or “the Company”) was incorporated as a Delaware corporation on November 21, 2016. The Company is a holding company whose sole material asset consists of a membership interest in SES Holdings, LLC (“SES Holdings” or the “Predecessor”). Unless otherwise stated or the context otherwise indicates, all references to the “Company” or similar expressions for time periods prior to the reorganization and Select 144A Offering transactions (as defined below) refer to SES Holdings and its subsidiaries. For time periods subsequent to the reorganization and Select 144A Offering transactions, these terms refer to Select Energy Services and its subsidiaries. On November 1, 2017, the Company completed the transactions in which Select merged with Rockwater Energy Solutions, Inc. (“Rockwater”) and Rockwater LLC in a stock-for-stock transaction (the “Rockwater Merger”). See Note 3—Acquisitions for further discussion. Select Energy Services is an oilfield services company that provides total water solutions and chemical solutions to the U.S. conventional oil and natural gas industry. The Company provides complementary water-related services that support oil and gas well completion and production activities including containment, monitoring, treatment, flowback and well testing, hauling and water recycling and disposal. The Company also develops and manufactures a full suite of specialty chemicals used in well completions and production chemicals used to enhance performance over the life of a well. These services are necessary to establish and maintain production of oil and gas over the productive life of a well. The Company also operates a wellsite services group to complement its total water solutions and chemical solutions offering. These services include equipment rental, accommodations, crane and logistics services, wellsite and pipeline construction, field and well services, sand hauling and fluids logistic services. In addition, the Company provides water transfer, fluids hauling, containment and rental services in Canada. The Company conducts its wellsite services activities on a third‑party contractual basis unrelated to its water‑related services. Reorganization: On December 20, 2016, Select Energy Services completed a private placement (the “Select 144A Offering”) of 16,100,000 shares of Class A‑1 Common Stock, par value $0.01 per share (“Class A-1 Common Stock”) at an offering price of $20.00 per share. In conjunction with the Select 144A Offering, SES Holdings’ then existing Class A and Class B units were converted into a single class of common units (the “SES Holdings LLC Units”) and SES Holdings effected a 10.3583 for 1 unit split. In exchange for the contribution of all net proceeds from the Select 144A Offering to SES Holdings, SES Holdings issued 16,100,000 SES Holdings LLC Units to Select Inc., and Select Inc. became the sole managing member of SES Holdings. Select Inc. issued 38,462,541 shares of Class B Common Stock to the other member of SES Holdings, SES Legacy Holdings, LLC (“Legacy Owner Holdco”) or one share for each SES Holdings LLC Unit held by Legacy Owner Holdco. Select Inc. also acquired 3,802,972 SES Holdings LLC Units from certain legacy owners (the “Contributing Legacy Owners”) in exchange for the issuance of 3,802,972 shares of Class A Common Stock. In connection with the closing of the Select 144A Offering, Class A-1 Common Stock was converted into Class A Common Stock. Refer below for further discussion. Shareholders of Class A Common Stock, and Class B Common Stock vote together as a single class on all matters, subject to certain exceptions in the Company’s amended and restated certificate of incorporation. Holders of Class B Common Stock have voting rights only and are not entitled to an economic interest in Select Inc. based on their ownership of Class B Common Stock. The reorganization transactions were treated as a combination of entities under common control with assets and liabilities transferred at their carrying amounts in a manner similar to a pooling of interests. Initial Public Offering: On April 26, 2017, the Company completed its initial public offering (“IPO”) of 8,700,000 shares of Class A Common Stock at a price of $14.00 per share. On May 10, 2017, the underwriters of the IPO exercised their over-allotment option to purchase an additional 1,305,000 shares of Class A Common Stock at the IPO price of $14.00 per share. After deducting underwriting discounts and commissions and estimated offering expenses payable by it, the Company received $128.5 million of the aggregate net proceeds from the IPO (including the over-allotment option). The Company contributed all of the net proceeds received by it to SES Holdings in exchange for SES Holdings LLC Units. SES Holdings used the net proceeds in the following manner: (i) $34.0 million was used to repay borrowings incurred under the Company’s Previous Credit Facility (as defined and discussed in Note 8) to fund the cash portion of the purchase price of the GRR Acquisition, as defined below, (ii) $7.8 million was used for the cash settlement of outstanding phantom unit awards and (iii) the remaining net proceeds are intended to be used for general corporate purposes, including funding capital expenditures. Credit Agreement: Concurrent with the Rockwater Merger, the Company entered into a $300.0 million senior revolving credit facility. In addition, the obligations under the Previous Credit Facility (as defined and discussed in Note 8) were repaid in full and the Previous Credit Facility (as defined and discussed in Note 8) was terminated. See Note 8— Debt for further discussion. Exchange rights: Under the Eighth Amended and Restated Limited Liability Company Agreement of SES Holdings (the “SES Holdings LLC Agreement”), Legacy Owner Holdco and its permitted transferees have the right (an “Exchange Right”) to cause SES Holdings to acquire all or a portion of its SES Holdings LLC Units for, at SES Holdings’ election, (i) shares of Class A Common Stock at an exchange ratio of one share of Class A Common Stock for each SES Holdings LLC Unit exchanged, subject to conversion rate adjustments for stock splits, stock dividends, reclassification and other similar transactions or (ii) cash in an amount equal to the Cash Election Value (as defined within the SES Holdings LLC Agreement) of such Class A Common Stock. Alternatively, upon the exercise of any Exchange Right, Select Inc. has the right (the “Call Right”) to acquire the tendered SES Holdings LLC Units from the exchanging unitholder for, at its election, (i) the number of shares of Class A Common Stock the exchanging unitholder would have received under the Exchange Right or (ii) cash in an amount equal to the Cash Election Value of such Class A Common Stock. In connection with any exchange of SES Holdings LLC Units pursuant to an Exchange Right or Call Right, the corresponding number of shares of Class B Common Stock will be cancelled. Registration rights: In December 2016, in connection with the closing of the Select 144A Offering, Select Inc. entered into a registration rights agreement with FBR Capital Markets & Co. for the benefit of the investors in the Select 144A Offering. Under this registration rights agreement, the Company agreed, at its expense, to file with the SEC, in no event later than April 30, 2017, a shelf registration statement registering for resale the 16,100,000 shares of Class A Common Stock issuable upon conversion of the Class A‑1 Common Stock sold in the Select 144A Offering plus any additional shares of Class A‑1 Common Stock issued in respect thereof whether by stock dividend, stock distribution, stock split or otherwise, and to use commercially reasonable efforts to cause such registration statement to be declared effective by the SEC as soon as practicable but in any event within 60 days after the closing of the IPO. The Company filed this registration statement with the SEC on April 28, 2017 and this registration statement was declared effective by the SEC on June 13, 2017. Accordingly, each share of Class A‑1 Common Stock outstanding automatically converted into a share of Class A Common Stock on a one‑for‑one basis at that time. In addition, Legacy Owner Holdco has the right, under certain circumstances, to cause the Company to register the shares of Class A Common Stock obtained pursuant to the Exchange Right. Tax receivable agreements: In connection with the Company’s restructuring at the Select 144A Offering, Select Inc. entered into two tax receivable agreements (the “Tax Receivable Agreements”) with Legacy Owner Holdco and certain other affiliates of the then-holders of SES Holdings LLC Units (collectively, the “TRA Holders”). On July 18, 2017, the Company’s board of directors approved amendments to each of the Tax Receivable Agreements. See Note 13—Related Party Transactions for further discussion. Basis of presentation: The accompanying consolidated financial statements of the Company have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) and pursuant to the rules and regulations of the SEC. The consolidated financial statements include the accounts of the Company and all of its majority‑owned or controlled subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. In the opinion of management, all adjustments which are of a normal recurring nature and considered necessary for a fair presentation of the Company’s financial statements have been included in these consolidated financial statements. The Company’s historical financial statements prior to the Select 144A Offering and reorganization transactions are prepared using SES Holdings’ historical basis in the assets and liabilities, and include all revenues, costs, assets and liabilities attributed to SES Holdings. For investments in subsidiaries that are not wholly owned, but where the Company exercises control, the equity held by the minority owners and their portion of net income or loss are reflected as noncontrolling interests. Investments in entities in which the Company exercises significant influence over operating and financial policies are accounted for using the equity method, and investments in entities for which the Company does not have significant control or influence are accounted for using the cost method. Discontinued operations: The Company considers a component of its business to be one that comprises operations and cash flows that can be clearly distinguished, operationally and for financial reporting purposes, from the rest of its business. The operating results of a component of its business that either has been disposed of or is classified as held for sale are presented as discontinued operations when the operations and cash flows of the component have been or will be eliminated from its ongoing operations as a result of the disposal transaction and the Company will not have any significant continuing involvement in the operations of the disposed component. Segment reporting: The Company has three operating and reportable segments. Operating segments are defined as components of an enterprise for which separate financial information is evaluated regularly by the chief operating decision maker in deciding how to allocate resources and assess performance. As a result of the Rockwater Merger, the Company reorganized its reporting structure and aligned its segments and underlying businesses to execute on the strategies of the combined company. The Company’s revised operating and reportable segments are Water Solutions, Oilfield Chemicals and Wellsite Services. Accordingly, prior period segment information has been retrospectively revised as of December 31, 2016 and for the years ended December 31, 2016 and 2015. Corporate and other expenses that do not individually meet the criteria for segment reporting are reported separately as Corporate. Reclassifications: Certain reclassifications have been made to the Company’s prior period consolidated financial information in order to conform to the current year presentation. These presentation changes did not impact the Company’s consolidated net income, total assets, total liabilities or total stockholders’ equity.

NOTE 1—BUSINESS AND BASIS OF PRESENTATION

Description of the business: Select Energy Services, Inc. (“Select Inc.” or “the Company”) was incorporated as a Delaware corporation on November 21, 2016. The Company is a holding company whose sole material asset consists of a membership interest in SES Holdings, LLC (“SES Holdings” or the “Predecessor”). Unless otherwise stated or the context otherwise indicates, all references to the “Company” or similar expressions for time periods prior to the reorganization and Select 144A Offering transactions (as defined below) refer to SES Holdings and its subsidiaries. For time periods subsequent to the reorganization and Select 144A Offering transactions, these terms refer to Select Energy Services and its subsidiaries.

On November 1, 2017, the Company completed the transactions in which Select merged with Rockwater Energy Solutions, Inc. (“Rockwater”) and Rockwater LLC in a stock-for-stock transaction (the “Rockwater Merger”). See Note 3—Acquisitions for further discussion.

Select Energy Services is an oilfield services company that provides total water solutions and chemical solutions to the U.S. conventional oil and natural gas industry. The Company provides complementary water-related services that support oil and gas well completion and production activities including containment, monitoring, treatment, flowback and well testing, hauling and water recycling and disposal. The Company also develops and manufactures a full suite of specialty chemicals used in well completions and production chemicals used to enhance performance over the life of a well. These services are necessary to establish and maintain production of oil and gas over the productive life of a well.

The Company also operates a wellsite services group to complement its total water solutions and chemical solutions offering. These services include equipment rental, accommodations, crane and logistics services, wellsite and pipeline construction, field and well services, sand hauling and fluids logistic services. In addition, the Company provides water transfer, fluids hauling, containment and rental services in Canada. The Company conducts its wellsite services activities on a third‑party contractual basis unrelated to its water‑related services.

Reorganization: On December 20, 2016, Select Energy Services completed a private placement (the “Select 144A Offering”) of 16,100,000 shares of Class A‑1 Common Stock, par value $0.01 per share (“Class A-1 Common Stock”) at an offering price of $20.00 per share. In conjunction with the Select 144A Offering, SES Holdings’ then existing Class A and Class B units were converted into a single class of common units (the “SES Holdings LLC Units”) and SES Holdings effected a 10.3583 for 1 unit split. In exchange for the contribution of all net proceeds from the Select 144A Offering to SES Holdings, SES Holdings issued 16,100,000 SES Holdings LLC Units to Select Inc., and Select Inc. became the sole managing member of SES Holdings. Select Inc. issued 38,462,541 shares of Class B Common Stock to the other member of SES Holdings, SES Legacy Holdings, LLC (“Legacy Owner Holdco”) or one share for each SES Holdings LLC Unit held by Legacy Owner Holdco. Select Inc. also acquired 3,802,972 SES Holdings LLC Units from certain legacy owners (the “Contributing Legacy Owners”) in exchange for the issuance of 3,802,972 shares of Class A Common Stock. In connection with the closing of the Select 144A Offering, Class A-1 Common Stock was converted into Class A Common Stock. Refer below for further discussion. Shareholders of Class A Common Stock, and Class B Common Stock vote together as a single class on all matters, subject to certain exceptions in the Company’s amended and restated certificate of incorporation. Holders of Class B Common Stock have voting rights only and are not entitled to an economic interest in Select Inc. based on their ownership of Class B Common Stock. The reorganization transactions were treated as a combination of entities under common control with assets and liabilities transferred at their carrying amounts in a manner similar to a pooling of interests.

Initial Public Offering: On April 26, 2017, the Company completed its initial public offering (“IPO”) of 8,700,000 shares of Class A Common Stock at a price of $14.00 per share. On May 10, 2017, the underwriters of the IPO exercised their over-allotment option to purchase an additional 1,305,000 shares of Class A Common Stock at the IPO price of $14.00 per share. After deducting underwriting discounts and commissions and estimated offering expenses payable by it, the Company received $128.5 million of the aggregate net proceeds from the IPO (including the over-allotment option). The Company contributed all of the net proceeds received by it to SES Holdings in exchange for SES Holdings LLC Units. SES Holdings used the net proceeds in the following manner: (i) $34.0 million was used to repay borrowings incurred under the Company’s Previous Credit Facility (as defined and discussed in Note 8) to fund the cash portion of the purchase price of the GRR Acquisition, as defined below, (ii) $7.8 million was used for the cash settlement of outstanding phantom unit awards and (iii) the remaining net proceeds are intended to be used for general corporate purposes, including funding capital expenditures.

Credit Agreement: Concurrent with the Rockwater Merger, the Company entered into a $300.0 million senior revolving credit facility. In addition, the obligations under the Previous Credit Facility (as defined and discussed in Note 8) were repaid in full and the Previous Credit Facility (as defined and discussed in Note 8) was terminated. See Note 8— Debt for further discussion.

Exchange rights: Under the Eighth Amended and Restated Limited Liability Company Agreement of SES Holdings (the “SES Holdings LLC Agreement”), Legacy Owner Holdco and its permitted transferees have the right (an “Exchange Right”) to cause SES Holdings to acquire all or a portion of its SES Holdings LLC Units for, at SES Holdings’ election, (i) shares of Class A Common Stock at an exchange ratio of one share of Class A Common Stock for each SES Holdings LLC Unit exchanged, subject to conversion rate adjustments for stock splits, stock dividends, reclassification and other similar transactions or (ii) cash in an amount equal to the Cash Election Value (as defined within the SES Holdings LLC Agreement) of such Class A Common Stock. Alternatively, upon the exercise of any Exchange Right, Select Inc. has the right (the “Call Right”) to acquire the tendered SES Holdings LLC Units from the exchanging unitholder for, at its election, (i) the number of shares of Class A Common Stock the exchanging unitholder would have received under the Exchange Right or (ii) cash in an amount equal to the Cash Election Value of such Class A Common Stock. In connection with any exchange of SES Holdings LLC Units pursuant to an Exchange Right or Call Right, the corresponding number of shares of Class B Common Stock will be cancelled.

Registration rights: In December 2016, in connection with the closing of the Select 144A Offering, Select Inc. entered into a registration rights agreement with FBR Capital Markets & Co. for the benefit of the investors in the Select 144A Offering. Under this registration rights agreement, the Company agreed, at its expense, to file with the SEC, in no event later than April 30, 2017, a shelf registration statement registering for resale the 16,100,000 shares of Class A Common Stock issuable upon conversion of the Class A‑1 Common Stock sold in the Select 144A Offering plus any additional shares of Class A‑1 Common Stock issued in respect thereof whether by stock dividend, stock distribution, stock split or otherwise, and to use commercially reasonable efforts to cause such registration statement to be declared effective by the SEC as soon as practicable but in any event within 60 days after the closing of the IPO. The Company filed this registration statement with the SEC on April 28, 2017 and this registration statement was declared effective by the SEC on June 13, 2017. Accordingly, each share of Class A‑1 Common Stock outstanding automatically converted into a share of Class A Common Stock on a one‑for‑one basis at that time. In addition, Legacy Owner Holdco has the right, under certain circumstances, to cause the Company to register the shares of Class A Common Stock obtained pursuant to the Exchange Right.

Tax receivable agreements: In connection with the Company’s restructuring at the Select 144A Offering, Select Inc. entered into two tax receivable agreements (the “Tax Receivable Agreements”) with Legacy Owner Holdco and certain other affiliates of the then-holders of SES Holdings LLC Units (collectively, the “TRA Holders”). On July 18, 2017, the Company’s board of directors approved amendments to each of the Tax Receivable Agreements. See Note 13—Related Party Transactions for further discussion.

Basis of presentation: The accompanying consolidated financial statements of the Company have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) and pursuant to the rules and regulations of the SEC. The consolidated financial statements include the accounts of the Company and all of its majority‑owned or controlled subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation.

In the opinion of management, all adjustments which are of a normal recurring nature and considered necessary for a fair presentation of the Company’s financial statements have been included in these consolidated financial statements.

The Company’s historical financial statements prior to the Select 144A Offering and reorganization transactions are prepared using SES Holdings’ historical basis in the assets and liabilities, and include all revenues, costs, assets and liabilities attributed to SES Holdings.

For investments in subsidiaries that are not wholly owned, but where the Company exercises control, the equity held by the minority owners and their portion of net income or loss are reflected as noncontrolling interests. Investments in entities in which the Company exercises significant influence over operating and financial policies are accounted for using the equity method, and investments in entities for which the Company does not have significant control or influence are accounted for using the cost method.

Discontinued operations: The Company considers a component of its business to be one that comprises operations and cash flows that can be clearly distinguished, operationally and for financial reporting purposes, from the rest of its business. The operating results of a component of its business that either has been disposed of or is classified as held for sale are presented as discontinued operations when the operations and cash flows of the component have been or will be eliminated from its ongoing operations as a result of the disposal transaction and the Company will not have any significant continuing involvement in the operations of the disposed component.

Segment reporting: The Company has three operating and reportable segments. Operating segments are defined as components of an enterprise for which separate financial information is evaluated regularly by the chief operating decision maker in deciding how to allocate resources and assess performance. As a result of the Rockwater Merger, the Company reorganized its reporting structure and aligned its segments and underlying businesses to execute on the strategies of the combined company. The Company’s revised operating and reportable segments are Water Solutions, Oilfield Chemicals and Wellsite Services. Accordingly, prior period segment information has been retrospectively revised as of December 31, 2016 and for the years ended December 31, 2016 and 2015. Corporate and other expenses that do not individually meet the criteria for segment reporting are reported separately as Corporate.

Reclassifications: Certain reclassifications have been made to the Company’s prior period consolidated financial information in order to conform to the current year presentation. These presentation changes did not impact the Company’s consolidated net income, total assets, total liabilities or total stockholders’ equity.